CN1128003C - Flue gas desulfurization and denitration absorbing liquor for jet bubbling method - Google Patents
Flue gas desulfurization and denitration absorbing liquor for jet bubbling method Download PDFInfo
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- CN1128003C CN1128003C CN 00112240 CN00112240A CN1128003C CN 1128003 C CN1128003 C CN 1128003C CN 00112240 CN00112240 CN 00112240 CN 00112240 A CN00112240 A CN 00112240A CN 1128003 C CN1128003 C CN 1128003C
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Abstract
The present invention discloses flue gas desulfurization and denitration absorbing liquid for jet bubbling, which is used for purifying coal-fired flue gas, and comprises lime slurry or limestone slurry, wherein the content of lime or limestone in the lime slurry or the limestone slurry is 0.5% to 25% according to the weight percentage, organic acid with water solubility is added in the lime slurry or the limestone slurry containing 0.5% to 25% of lime or limestone according to the weight percentage, and the adding quantity of the organic acid with water solubility is only 0.05% to 0.5% of lime slurry or limestone slurry according to the weight percentage. The present invention can make the action of desulfurization and denitration at the same time, and has the advantage of high efficiency of desulfurization and denitration.
Description
The present invention relates to a kind of absorption liquid that is used to purify coal-fired flue-gas, refer in particular to flue gas desulfurization and denitration absorbing liquor for jet bubbling method.
Existing absorption liquid consist of lime or lime stone slurry, this absorption liquid is effective to desulfurization, and is little to denitration effect, and desulfuration efficiency is not high.This is because the pH value fluctuation is big during the lime slurry desulfurization, is difficult to stable operation, and in the lime stone slurry because lime stone solubility is low, reaction is subjected to the restriction of lime stone dissolving, thereby their desulfuration efficiency is not too high.
Goal of the invention of the present invention is to provide a kind of flue gas desulfurization and denitration absorbing liquor for jet bubbling method that can improve purification efficiency.
The present invention adopts following technical scheme to realize its goal of the invention:
The present invention is a kind of JBR flue gas desulfurization and denitration absorbing liquor that is used to purify coal-fired flue-gas, comprise: lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are 0.5%～25% lime or lime stone slurries, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant in lime that contains 0.5%～25% (percentage by weight) or lime stone slurry, its addition is 0.05%～0.5% (percentage by weight) of lime or lime stone slurry.
Compared with prior art, the present invention has following advantage:
1. owing to contain the water-soluble organic acid that is lower than sulfurous acid first dissociation constant in the present invention, can form cushioning liquid, so be lower than the water-soluble organic acid of sulfurous acid first dissociation constant pH value of the present invention is produced cushioning effect, make its pH value maintain more stable level, avoided the fluctuation of operation, organic acid has promoted the dissolving of lime or lime stone, has improved desulfuration efficiency.In addition, the present invention can also absorb the nitrogen dioxide in the flue gas.So the present invention is desulphurization denitration simultaneously, and can improve the purification efficiency of flue gas.
2. the zinc among the present invention, iron, copper, ferrous, cuprous series metal chelate have catalytic action, can make nitric oxide in the flue gas change nitrogen dioxide into apace and absorbed by the present invention, so, the adding of metallo-chelate has further improved denitration efficiency, makes gas cleaning efficient be able to further raising.
Below be specific embodiments of the present invention:
The present invention is a kind of JBR flue gas desulfurization and denitration absorbing liquor that is used to purify coal-fired flue-gas, comprise: lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are 0.5%～25% lime or lime stone slurries, in the lime lime stone slurry that contains 0.5%～25% (percentage by weight), add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant, its addition is 0.05%～0.5% (percentage by weight) of lime or lime stone slurry, also add metallo-chelate in lime or lime stone slurry, its addition (percentage by weight) is 0.03%～0.3% of lime or a lime stone slurry.
Embodiment 1:
Flue gas desulfurization and denitration absorbing liquor for jet bubbling method of the present invention, comprise lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are 0.5% lime or lime stone slurries, in lime that contains 0.5% (percentage by weight) or lime stone slurry, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant, for example: formic acid, its addition (percentage by weight) is 0.05% of lime or a lime stone slurry, the present invention also adds metallo-chelate in above-mentioned lime or lime stone slurry, its addition (percentage by weight) is 0.03%, above-mentioned metallo-chelate is an iron series metal chelate, the described technical scheme of present embodiment can make the denitration efficiency of flue gas be increased to 80%, and desulfuration efficiency has improved more than 5% with respect to existing lime slurry absorption liquid, and desulfuration efficiency has improved more than 15% with respect to existing lime stone slurry.
Embodiment 2:
Flue gas desulfurization and denitration absorbing liquor for jet bubbling method of the present invention, comprise lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are lime stone slurries in 1% the lime, in lime that contains 1% (percentage by weight) or lime stone slurry, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant, for example: acetate, its addition (percentage by weight) is 0.1% of lime or a lime stone slurry, the present invention also adds metallo-chelate in above-mentioned lime or lime stone slurry, its addition (percentage by weight) is 0.07%, above-mentioned metallo-chelate is a copper series metal chelate, the described technical scheme of present embodiment can make the denitration efficiency of flue gas be increased to 80%, and desulfuration efficiency has improved more than 5% with respect to existing lime slurry absorption liquid, and desulfuration efficiency has improved more than 15% with respect to existing lime stone slurry.
Embodiment 3:
Flue gas desulfurization and denitration absorbing liquor for jet bubbling method of the present invention, comprise lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are lime stone slurries in 10% the lime, in lime that contains 10% (percentage by weight) or lime stone slurry, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant, for example: succinic acid, its addition (percentage by weight) is 0.25% of lime or a lime stone slurry, the present invention also adds metallo-chelate in above-mentioned lime or lime stone slurry, its addition (percentage by weight) is 0.1%, above-mentioned metallo-chelate is ferrous series metal chelate, the described technical scheme of present embodiment can make the denitration efficiency of flue gas be increased to 80%, and desulfuration efficiency has improved more than 5% with respect to existing lime slurry absorption liquid, and desulfuration efficiency has improved more than 15% with respect to existing lime stone slurry.
Embodiment 4:
Flue gas desulfurization and denitration absorbing liquor for jet bubbling method of the present invention, comprise lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are lime stone slurries in 18% the lime, in lime that contains 18% (percentage by weight) or lime stone slurry, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant, for example: adipic acid, its addition (percentage by weight) is 0.35% of lime or a lime stone slurry, the present invention also adds metallo-chelate in above-mentioned lime or lime stone slurry, its addition (percentage by weight) is 0.15%, above-mentioned metallo-chelate is a zinc series metal chelate, the described technical scheme of present embodiment can make the denitration efficiency of flue gas be increased to 80%, and desulfuration efficiency has improved more than 5% with respect to existing lime slurry absorption liquid, and desulfuration efficiency has improved more than 15% with respect to existing lime stone slurry.
Embodiment 5:
Flue gas desulfurization and denitration absorbing liquor for jet bubbling method of the present invention, comprise lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are lime stone slurries in 25% the lime, in lime that contains 25% (percentage by weight) or lime stone slurry, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant, for example: acetate, its addition (percentage by weight) is 0.5% of lime or a lime stone slurry, the present invention also adds metallo-chelate in above-mentioned lime or lime stone slurry, its addition (percentage by weight) is 0.21%, above-mentioned metallo-chelate is cuprous series metal chelate, the described technical scheme of present embodiment can make the denitration efficiency of flue gas be increased to 80%, and desulfuration efficiency has improved more than 5% with respect to existing lime slurry absorption liquid, and desulfuration efficiency has improved more than 15% with respect to existing lime stone slurry.
Embodiment 6:
Flue gas desulfurization and denitration absorbing liquor for jet bubbling method of the present invention, comprise lime or lime stone slurry, this lime or lime stone slurry are that lime or limestone content (percentage by weight) are lime stone slurries in 7% the lime, in lime that contains 7% (percentage by weight) or lime stone slurry, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant, for example: succinic acid, its addition (percentage by weight) is 0.45% of lime or a lime stone slurry, the present invention also adds metallo-chelate in above-mentioned lime or lime stone slurry, its addition (percentage by weight) is 0.04%, above-mentioned metallo-chelate is an iron series metal chelate, the described technical scheme of present embodiment can make the denitration efficiency of flue gas be increased to 80%, and desulfuration efficiency has improved more than 5% with respect to existing lime slurry absorption liquid, and desulfuration efficiency has improved more than 15% with respect to existing lime stone slurry.
Claims (7)
1. JBR flue gas desulfurization and denitration absorbing liquor that is used to purify coal-fired flue-gas, comprise: lime or lime stone slurry, it is characterized in that this lime or lime stone slurry are that lime or limestone content (percentage by weight) are 0.5%～25% lime or lime stone slurries, add the water-soluble organic acid that is lower than sulfurous acid first dissociation constant in lime that contains 0.5%～25% (percentage by weight) or lime stone slurry, its addition is 0.05%～0.5% (percentage by weight) of lime or lime stone slurry.
2. flue gas desulfurization and denitration absorbing liquor for jet bubbling method according to claim 1 is characterized in that also adding metallo-chelate in lime or lime stone slurry, its addition (percentage by weight) is 0.03%～0.3% of lime or a lime stone slurry.
3. flue gas desulfurization and denitration absorbing liquor for jet bubbling method according to claim 2 is characterized in that metallo-chelate is an iron series metal chelate.
4. flue gas desulfurization and denitration absorbing liquor for jet bubbling method according to claim 2 is characterized in that metallo-chelate is a copper series metal chelate.
5. flue gas desulfurization and denitration absorbing liquor for jet bubbling method according to claim 2 is characterized in that metallo-chelate is ferrous series metal chelate.
6. flue gas desulfurization and denitration absorbing liquor for jet bubbling method according to claim 2 is characterized in that metallo-chelate is a zinc series metal chelate.
7. flue gas desulfurization and denitration absorbing liquor for jet bubbling method according to claim 2 is characterized in that metallo-chelate is cuprous series metal chelate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112240 CN1128003C (en) | 2000-04-28 | 2000-04-28 | Flue gas desulfurization and denitration absorbing liquor for jet bubbling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112240 CN1128003C (en) | 2000-04-28 | 2000-04-28 | Flue gas desulfurization and denitration absorbing liquor for jet bubbling method |
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| Publication Number | Publication Date |
|---|---|
| CN1321539A CN1321539A (en) | 2001-11-14 |
| CN1128003C true CN1128003C (en) | 2003-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 00112240 Expired - Fee Related CN1128003C (en) | 2000-04-28 | 2000-04-28 | Flue gas desulfurization and denitration absorbing liquor for jet bubbling method |
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| CN1321539A (en) | 2001-11-14 |
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