Onoda Cement Co., Ltd.

Waseda University

Hajime Nagayama

Akinori Watanabe

Akira Hirata

Hiroshi Hagiwara

Masaru Shirasaka

Kenji Shimaji

Kouji Nitta

A three phase fluidized bed water purifying process comprises purifying effluents in a three phase fluidized bed composed of solid particles, an effluent, and a gas in fluidized state, the solid particles being made by mixing a binder with an inorganic material based on aluminium silicate, granulating the resulting mixture, and firing the granules to sinter them. The present invention permits the purification of effluent for a long period of time without oxygen deficiency.

Three phase fluidized bed water purifying process

A hardened product prepared by mixing cement with limestone or dolomite and hardening it by incorporating water can be used as a heat medium for a fluidized bed heating furnace and also act as a preferred desulfurizing agent having a high desulfurizing performance which can effectively absorb to eliminate the sulfur components in exhaust or product gases from the heating furnace. The strength as the heat medium and the desulfurizing performance can further be increased by setting the cement content in the mixture between 10-70% by weight and the particle size for the mixture between 0.7 and 2.0 mm. Furthermore, the desulfurizing agent can be produced preferably by previously setting the particle size of the mixture to less than 0.3 mm and then adding 5-20% by weight of the seed material between 0.3 mm and 1.2 mm in particle size, followed by pelletization.

Desulfurizing agent

Growing community of inventors

Hino, Japan

Hajime Nagayama