Title:
EXHAUST GAS TREATMENT METHOD, AND EXHAUST GAS TREATMENT DEVICE
Document Type and Number:
Japanese Patent JP2015073955
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust gas treatment method and an exhaust gas treatment device which improve removal performance of sulfuric acid mist, by enlarging a particle size of sulfuric acid mist without bringing about complication of an exhaust gas treatment system.SOLUTION: In an exhaust gas treatment method for removing sulfur oxide contained in exhaust gas from a combustion device such as a boiler, heat is recovered from the exhaust gas by heat exchange between heating medium which primarily comprising water and the exhaust gas, thereby, a temperature of the exhaust gas is lowered to a dew point of anhydrous sulfuric acid or less, vapor is generated from the heating medium to recover the vapor, the vapor is added into the exhaust gas after recovering heat and, thereafter, sulfur oxide is removed. The vapor generated by utilizing heat of exhaust gas is added into exhaust gas of which exhaust gas temperature is lowered, thereby, a particle size of sulfuric acid mist increases and, therefore, sulfuric acid mist is easily removed. Further, a heat recovery unit installed in an exhaust gas treatment device is utilized for recovery of heat and, therefore, a simple exhaust gas treatment system can be constructed without installing an additional device for generating vapor.
Inventors:
OMINE SHIGETO
IMADA NORIYUKI
ISHIZAKA HIROSHI
IMADA NORIYUKI
ISHIZAKA HIROSHI
Application Number:
JP2013212578A
Publication Date:
April 20, 2015
Filing Date:
October 10, 2013
Export Citation:
Assignee:
MITSUBISHI HITACHI POWER SYS
International Classes:
B01D53/50; B01D47/06; B01D51/04; B01D53/68; B01D53/77
Attorney, Agent or Firm:
Takayoshi Matsunaga
Iizuka Muko
Kamei Takeyuki
Go Sasaki
Iizuka Muko
Kamei Takeyuki
Go Sasaki