Mitsubishi Gas Chemical Company, Inc.

Kazuo Yamamoto

Takehiko Takahashi

Hiromi Nakamura

Norio Sayama

Norio Narazaki

The present invention relates to a method for efficiently recovering energy from off-gas with high temperatures and high pressures released from the oxidation reactor of aromatic compounds such as xylene, pseudocumene, durene and the like. More particularly, the present invention relates to a method for energy recovery from oxidation reactor off-gas, which comprises subjecting off-gas with high temperature and high pressure from an oxidation reactor to heat exchange with cooling water to cool the off-gas, subjecting the cooled off-gas to direct counter-flow contact with the water heated by said heat exchange to obtain a mixture of off-gas and steam, and cooled water, circulating the cooled water for reuse as said cooling water for said high temperature and high pressure off-gas, and sending the mixture of off-gas and steam to an expander to recover energy therefrom. According to the present invention, the energy recovered from off-gas increases by an amount equivalent to the amount of steam saturating in and accompanying the off-gas.

Method for energy recovery from oxidation reactor off-gas

In a regenerative gas turbine cycle in which heat recovery is carried out by multi-phase and multi-component mixture of compressed air/liquid phase water/steam (hereinafter referred to as MPC mixture), said mixture being obtained by injection of liquid phase water (hereinafter referred to simply as water) into a part of or the whole of compressed gas using air or air based gas (hereinafter referred to as air) as a combustion supporting/working medium gas; the improvement comprising

Regenerative gas turbine cycle

A regenerative gas turbine cycle wherein heat recovery is carried out by a mixture of air/steam which is obtained by contact between water and compressed air, the compressed air being compressed by a compressor for compressing gas using air or air based gas as a combustion supporting/working medium gas. The cycle includes the improvement whereby mixture of air/steam and liquid phase cooled water is obtained through contact between the compressed air and heated water which is used as heat recovering medium; the cooled water being used as heat recovering medium not only for heat recovery of turbine exhaust gas but also, for

In a regenerative gas turbine cycle in which heat recovery is carried out by a mixture of air/steam which is obtained by contact between water and a part of or the whole of compressed air, said compressed air being compressed by a compressor for compressing gas using air or air based gas as a combustion supporting/working medium gas; the improvement comprising: the mixture of air/steam and liquid phase cooled water being obtained through the contact between the compressed air and heated water which is used as heat recovering medium; said cooled water being used as heat recovering medium not only for heat recovery of turbine exhaust gas but also, for

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Kanagawa, Japan

Kazuo Yamamoto