224

`70 `SO2 NOX

`CO2` `87 67 60 ` `71

[1]

`2010` `SO2``10

[2]

/Selective Catalytic Reduction ` `SCR

-`1 `2* `2 1. 200093

2. 201620Han Hengchao 1 Liu Weijun 2* Cao Weiwu 2 (1. School of Energy & Power Engineering,University of Shanghai for Science and Technology, Shanghai 200093;2. College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620)

` `

` `

Abstract With the continuously intensifying environmental policies, it becomes more important to chooseappropriate and effective flue gas cleaning technologies for industrial coal-fired boilers for ensuring environmentalbenefits as well as enterprise profits. Several typical combined technologies for simultaneously removing two ormore flue gas pollutants in coal-fired boilers were summarised and classified into combined desulphurisation anddust collecting technology, simultaneous desulphurisation and denitrification technology, and combineddesulphurisation, nitrogen and dust removing technology. Based on researches and practices for many years, anew dry type of “electro-cyclonic integrated installation” has been put forward. This device combines coronadischarge plasma technology with electro-cyclonic dedusting technology, and utilises hydrotalcite-like compoundsas additives. It could realize various flue gas pollutant removals with low investment and operation costs. Thisinstallation would be suitable for small- and medium-sized coal boilers.

Key words: Coal-fired boiler Flue gas Desulphurisation Denitrification DedustingCombined removal Electro-cyclonic

1986` 2009`

* lwj_1119@yahoo.com.cn

225

[3]

`2`

SO2`

CaCO3 [CaO Ca OH 2]`CaO MgO Fe2O3`

`SO2`

SO2`

[4]

1.1

[5]

/

1.2 SSX`SSX`

`1 `35`t/h

`SO2

`95 `70 [6]

`3` `1`

1.3

`3` `1`

`2

226

`1

`SO2` `NaOH`[7]

1.4

`SO2`

`70 98

`2 ` `90

[8]

1.5 (LIFAC)[8 10]

`1`CaCO3 `CaO`

`SO2` CaSO4

CaSO3 `3LIFAC`

`CaO``SO2

`75

`85

1.6 CFB FGD`20` `80`

`Lurgi``4

[11]

`ABB`NID

NID``5 `CaO`

`Ca OH 2

`2 `5`SO2`

`95

227

`80 ` SO3 HCl` `HF `98`CaO` `Ca OH 2`

`SO2 [12]

`SO2` `NOX`SCR

`SO2` `NOX``SO2`

`NOX`

`WFGD+Fe EDTA`[13]

`SO2` `NOX`

/

2.1 /2.1.1`

`19``20` `70`

[14]`

[15]`

`SO2

`SO2``NH3` `NOX`

NOX

`N2[14] `HCl

HF`98 ` `80 `

[16]

2.2 CuO`CuO` [17 18]` `CuO`

`CuO/Al2O3` `CuO/SiO2 CuO``4 6 `300 450

`SO2` `CuO``CuSO4 CuSO4` `CuO`

`NOX `CuSO4``SO2` `Claus`

`90 ` `SO2` `75 80 ``NOX`

CuO``CuO`

`SO2`2.3

Hydrotalcite `HT

`Mg6Al2 OH 16CO3

4H2O` `1` `Mg2+` `Al3+``Cu2+ Co2+` `Fe3+

Cr3+` Hydrotalcite-like compounds `HTLcs

[19]

` S O 2 ` ` N O X ``SO2` `O2`

NOX` `NH3``CO`

H2 CO`

[20 21]

[22]` `O2` SO2` `NO`

`SO2` `NOX

`4`NiMgAlO` `CuMgAlO` `ZnMgAlO` `FeMgAlO

`NiMgAlO` `SO2` `NO`

2.4

228

[23]

[24]`

`SO2` `NO

`95.5 ``64.8

[25]`

`SO3` `HCN` `HCl` `HF`

2.5

`H2O O2` `O OH` `O3``SO2` `NOX`

`NH3`

`2`19` `70`

EBA

Masuda` [26]`

PPCP

[27]`

[28]` `1 000 3 000`Nm3/h` `40 00050 000`Nm3/h`

`80 ` `50 `

Chang J S` [29]`

Corona Radical Shower `CRS`1 000~1 500 Nm3/h`

`99 ` `75

[30 31]

3.1 SNRB`SNRB` [8 11]` `Babcock & Wilcox`

`1``6 `SO2`

NOX`

`SO2`

SO2` `SO3``0.5

`90 `90 `99`84 95 `HF` `HCl`

SNRB`

`300 500

3.2

1989` `Clements J S [32]`

`SO2 NOX`

229

PEERChang[33]`

`VOCs`[34]` `1`

+

`1/3`

`30 [35] [36]`

3.3 [37 39]

Electro-cyclonic Integrtated Installation

`7

`SOX``NOX``

`2`

230

-

2011 07 19

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Met One In-

struments