HEAT RECOVERY DEVICE OF EXHAUST GAS AND EXHAUST GAS TREATMENT SYSTEM USING THE SAME

• Main Authors: ANDO MASAHIRO, KOJIMA TAIJI, YAMAMOTO HASHIRA, TORII TOYOHIKO, HASHIMA HIDEKAZU
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2015
• Subjects: BLASTING; CHEMISTRY; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; GLASS; HEAT EXCHANGE IN GENERAL; HEATING; LIGHTING; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; MECHANICAL ENGINEERING; METALLURGY; MINERAL OR SLAG WOOL; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a heat recovery device of an exhaust gas where heat recovery from the exhaust gas can be efficiently achieved from a high temperature region to a low temperature region and exhaust gas treatment corresponding to the acid dew point of the exhaust gas can be performed.SOLUTION: In a heat recovery device of an exhaust gas having a first cooling unit 1, a desulfurization treatment unit 2, a dust removal treatment unit 3 and a second cooling unit 4: dust removal treatment is achieved by using a heat-resistant filter medium 3a in the dust removal treatment unit 3; cooling treatment is achieved so that the temperature of a second exhaust gas G2 is an acid dew point or higher and the heat-resistant temperature of the filter medium 3a or lower in the first cooling unit 1; cooling treatment is achieved so that the surface temperature of a ceramic pipe 4n is the acid dew point of a third exhaust gas G3 or lower using the ceramic pipe 4n whose main component is SiC in the second cooling unit 4; and the third exhaust gas G3 is heat-exchanged with a heat medium M supplied to the inside of the ceramic pipe 4n and the warm heat of the heated heat medium M is recovered. 【課題】 排ガスからの熱回収を、高温領域から低温領域まで効率よく行うことができ、かつ排ガスの酸露点に対応した排ガス処理を行うことができること。【解決手段】 第１冷却部１と、脱硫処理部２と、除塵処理部３と、第２冷却部４と、を有し、除塵処理部３において、耐熱性の濾過材３ａを用いて除塵処理され、第１冷却部１において、第２排ガスＧ２が酸露点以上濾過材３ａの耐熱温度以下となるように冷却処理され、第２冷却部４において、ＳｉＣを主成分としたセラミックス管４ｎを用い、セラミックス管４ｎの表面温度が、第３排ガスＧ３の酸露点以下となるように冷却処理されるとともに、第３排ガスＧ３が、セラミックス管４ｎの内部に供給された熱媒体Ｍと熱交換され、加熱処理された熱媒体Ｍの温熱が回収されることを特徴とする。【選択図】 図１