219

`75 `

`SO2

`40 ` `SO2

[1]

1998` `1` `21`

[1998]5`

1 `

1 `

`2010`

`SO2`

3

( )

`30

(

)

`20` `60`

`20` `80`

LIMB `Tampel la `

Limestone Injection

200233

Liu Li Cheng Yangxue Yu Wenxi (Shanghai Academy of Environmental Sciences, Shanghai 200233)

Abstract As the acid rain resulted from SO2 emission of coal-fired power plants has damaged the people’sliving environment seriously, the flue gas desulphurisation (FGD) has been put in the agenda of the governmentin China, and coal-fired power plants are forced to equip FGD installations. Several widely used FGD processeswere summarized and compared each other. Finally, some opinions about home FGD market and its technologi-cal domesticization were given.

Key words: Flue gas desulphurisation (FGD) Desulphurisation process Wet process of desulphurisationSemi-dry process of desulphurisation Dry process of desulphurisationFGD technological domesticization

1981` 2004`

220

into the Furnace and Activation of Calcium

L I F A C

F l u e G a s D e s u l f u r i z a t i o n

`FGD `SO2`

20` `60`

`EPRI( ) [2]

`300` `FGD`

`SO2`

(WFGD) (DFGD) (SDFGD)

`1 `

3

` 4 ` /

(Circulat ing

Fluidized Bed Flue Gas Desulfurization `CFB

F G D )

SO2

/

CaCO3

Ca(OH)2

CaO

Na2CO3

NaOH

+Ca(OH)2

NH3

MgO

Na2SO3+CaCO3

CaO

Ca(OH)2

CaCO 3 Ca(OH)2

CaO Ca(OH) 2

CaCO 3 Ca(OH)2

Ca(OH)2

CaSO3,CaSO4

Na2SO3

(NH4)2SO4

MgSO3/MgSO4

CaSO3/CaSO4

CaSO3/CaSO4

CaSO3/CaSO4

CaSO3/CaSO4

CaSO3/CaSO4

CaSO3/CaSO4

2.1 /

`Ca/S=1.1 1.25` `98

/ `FGD`

`70 3

`1 `

`FGD`

221

SO2`

1 . 5

2.2

`20` `20`

`20` `70`

`SO2`

` 2 `

`SO 2 `

`CaSO3`

/

`1.0 2.5

`Ca/S` `1 .1 1.6 `

` 8 0 9 0

/

[ 1 ]

2.3

`20` `50`

( `15 40 )

(15 ) `20 ` `70 `

20` `80` `Tampella`

L I F A C

3

`80 `

`1.0 2.5

2.4

CFB FGD `20`

`80 ` Lurgi

[ 4 ]

4`

` S O 2 `

`SO2`

222

`98

`30min`

`4`

` 2 `

1.2

85

5 7

80

Ca/S

/

1.5

1.1 1.2

90

15 20

90

1 3

1.5 2

80 90

10 15

50 55

2

2.5

60 80

4 7

35 40

`SO2` `SO2`

`700 kW `1 000

kW `3.845 kW` 4.42

`90

`90

`1 000`

4.1

( 1 )

( )/

`1 000` /`kW `600` /`kW`

`30 kW` `1 `

(2) `SO2`

`SO 2 `

(3)

4.2

(1)

( 2 )

223

(3)

( 4 )

4.3

(1)

(2)

(3)

(4)

4.4

4.4.1`

`40`

4.4.2`

`10`

SO 2

4.4.3`

SO2

`SO 2 `

4.4.4`

SO 2`

`SO2`

2006 04 18