Desulfurization device

Patent metadata

Field	Value
Publication number	US-9446345-B2
Application number	US-201514858611-A
Country	US
Kind code	B2
Filing date	Sep 18, 2015
Priority date	Jun 6, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

Provided are a downward-inclined-flow passage to which flows flue gas from the flue path connecting a boiler with a stack, a sprayer arranged upstream in the downward-inclined-flow passage to inject absorbing liquid absorptive of sulfur oxides in a direction same as that of flue gas flow, an upward-inclined-flow passage to guide flue gas from the downward-inclined-flow passage to the flue path, a reservoir arranged between lower ends of the flow passages, an auxiliary sprayer arranged in the downward-inclined-flow passage downstream of the sprayer to inject absorbing liquid for uniformization thereof in the downward-inclined-flow passage and a baffle plate arranged in the downward-inclined-flow passage downstream of the auxiliary sprayer and in an upper zone of the flow passage to throttle the flow-passage inner diameter.

First claim

The invention claimed is:

1. A desulfurizer comprising
a descending downward-inclined flow passage through which flows flue gas from a flue path connecting a fuel combustor with a stack,
a sprayer arranged upstream in the downward-inclined flow passage to inject absorbing liquid absorptive of sulfur oxides in a direction same as that of flue gas flow,
an ascending upward-inclined flow passage to guide the flue gas from the downward-inclined flow passage to the flue path,
a reservoir arranged between lower ends of the upward- and downward-inclined flow passages,
an auxiliary sprayer arranged in the downward-inclined flow passage downstream of the sprayer to inject absorbing liquid axially of the downward-inclined flow passage from a vertically upper side in the downward-inclined flow passage, and
a baffle plate arranged in the downward-inclined flow passage downstream of the auxiliary sprayer and in an upper zone of the flow passage, said baffle plate being a plate member projected diametrically inwardly from the vertically upper side of the downward-inclined flow passage.

2. The desulfurizer as claimed in claim 1 , wherein a mist eliminator to remove mist of the absorbing liquid is arranged downstream in the upward-inclined flow passage.

3. The desulfurizer as claimed in claim 1 , wherein the upward-inclined flow passage has a flow-passage cross sectional area greater than that of the downward-inclined flow passage.

4. The desulfurizer as claimed in claim 2 , wherein the upward-inclined flow passage has a flow-passage cross sectional area greater than that of the downward-inclined flow passage.

5. The desulfurizer as claimed in claim 1 , wherein the flue path includes a bypass damper, and the flue gas flows from the fuel combustor to the stack through the descending downward-inclined flow passage and the ascending upward-inclined flow passage when the bypass damper is closed.

Assignees

• Ihi Corp

Inventors

• Naito Toshiyuki

Classifications

• B01D2251/404

  of calcium · CPC title

• F23J15/04

  using washing fluids {(scrubbers for removing solids only F23J15/022)} · CPC title

• B01D2258/0283

  Flue gases · CPC title

• F23J2215/20

  Sulfur; Compounds thereof · CPC title

• F23J2217/20

  by baffles · CPC title