US 8,298,321 B2 · River water utilizing flue gas desulfurization system and humic substance removing method

Abstract

A river water utilizing flue gas desulfurization system 10 according to an embodiment of the present invention includes: a pre-treatment facility 13 that removes humic substances in river water 11 to produce makeup water 12; and a desulfurization apparatus 17 that brings sulfur content in flue gas 15 into contact with limestone gypsum slurry 16 in an apparatus body 14. The pre-treatment facility 13 includes a flocculant mixing basin 22 in which a flocculant 21 is added to the river water 11 to flocculate and remove the humic substances contained in the river water 11; and an activated carbon absorption unit 23 in which the humic substances contained in the river water 11 are absorbed and removed by way of activated carbon.

Claims17

Dependent claims

A river water utilizing flue gas desulfurization system comprising:

a pre-treatment facility that removes humic substances contained in river water to produce makeup water;
and
a desulfurization apparatus that brings sulfur content in flue gas into contact with water to wash out the sulfur content in an apparatus body, wherein
the pre-treatment facility includes a coal-based activated carbon absorption unit that allows the coal-based activated carbon to absorb and remove the humic substances contained in the river water.

1 more element

A humic substance removing method comprising:

a first step of measuring a concentration of humic substances in river water;
a step of flocculating and removing the humic substances in and from the river water by adding a flocculant to the river water;
and
a step of absorbing and removing the humic substances in and from the river water by way of a coal-based activated carbon, wherein
the concentration of the humic substances in the river water is measured at the first step of measuring;
and
the flocculant is added to the river water based on a predetermined relationship between the concentration of the humic substances in the river water and an amount of the flocculant required to be added to remove the humic substances from the river water at the step of flocculating and removing.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/674,270Filed 25 Nov 2009

Priority

JP 2009-15283026 Jun 2009

Published

US 2011/0259195 A127 Oct 2011

Granted

30 Oct 2012

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

B01D 53/502
By treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound: characterised by a specific solution or…
C02F 1/283
By sorption: using coal, charred products, or inorganic mixtures containing them
C02F 1/5209
By flocculation or precipitation of suspended impurities: regulation methods for flocculation or precipitation
C02F 1/5245
Using inorganic agents: using basic salts, e.g. of aluminium and iron

River water utilizing flue gas desulfurization system and humic substance removing method

Life of this patent

River water utilizing flue gas desulfurization system and humic substance removing method

Life of this patent

Abstract

Claims17