CN103908885A - Preparation method and application of zinc oxide slurry for flue gas desulfurization - Google Patents
Preparation method and application of zinc oxide slurry for flue gas desulfurization Download PDFInfo
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- CN103908885A CN103908885A CN201410134932.5A CN201410134932A CN103908885A CN 103908885 A CN103908885 A CN 103908885A CN 201410134932 A CN201410134932 A CN 201410134932A CN 103908885 A CN103908885 A CN 103908885A
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- zinc oxide
- flue gas
- oxide slurries
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- gas desulfurization
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Abstract
The invention relates to a preparation method and application of zinc oxide slurry for flue gas desulfurization. The preparation method comprises the following steps: firstly, mixing water and zinc oxide to form zinc oxide slurry; mixing alkanolamine, an inorganic salt and a surfactant; and finally, adding a mixture of the alkanolamine, the inorganic salt and the surfactant into the zinc oxide slurry formed by mixing the water and the zinc oxide to prepare zinc oxide slurry containing the mixture of the alkanolamine, the inorganic salt and the surfactant. The zinc oxide slurry is used for tail gas desulfurization in smelting industry. The zinc oxide slurry is capable of remarkably improving a sulfur dioxide absorbing effect, reducing the viscosity of the zinc oxide slurry, preventing blockage in a production process, further reducing the pollution, saving resources, and increasing economic benefits.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of preparation method and application of the flue gas desulfurization that contains the mixture being mixed by alkanolamine, inorganic salts and surfactant zinc oxide slurries.
Background technology
Sulfur dioxide, as one of main gas of atmosphere pollution, has caused people's extensive concern.Flue gas desulfurization is the effective ways that reduce sulphur emissions, the countries in the world desulfur technology that begins one's study from the 1950's, so far desulfur technology has reached kind more than 200, and main method has the multiple sulfur removal technologies such as wet desulphurization, semi-dry desulphurization, dry desulfurization, the desulfurization of rotary spraying and drying method, E-beam absorption.Use at present more generally limestone/lime method, soda method, renewable solvent absorption cycle and ammonia process both at home and abroad.
But for Lead And Zinc Smelter, these methods exist that raw material sources are difficult for, byproduct is disposed difficulty or processing cost and crossed the problems such as high.
Zinc oxide method is a kind of sulfur method for zinc smeltery flue gas, flue dust, waste residue and waste electrolyte that its raw material oxide powder and zinc can utilize zinc metallurgical process to produce make, for absorbing the sulfur dioxide gas of flue gas, generating product is zinc sulfite solid, zinc sulfate liquid or zinc sulfate solid.Zinc sulfite solid can be decomposed into zinc oxide and sulfur dioxide by adding thermal decomposition or acid, and zinc oxide returns and makees absorbent, and sulfur dioxide can be produced sulfuric acid or sulfur dioxide liquid processed; Also can zinc sulfite be oxidized to soluble zinc sulfate by oxidizing process, zinc sulfate liquid or the zinc sulfate solid obtaining by evaporative crystallization all can return to smelting shop and re-use.As can be seen here, this technology is combined closely sulfur removal technology and original smelting process, absorbent adopts the flue dust containing zinc oxide in factory, waste residue and waste electrolyte, the solution of zinc sulfate producing, solid slags etc. all can return to relevant workshop in factory and again utilize, the source of absorbent and the processing problem of product are well solved, reach the maximization of the utilization of resources, reduce circulating fund, reduce operating cost, but in actual application, find that the method exists assimilation effect poor, zinc oxide paste fluid viscosity is large, the problems such as easy obstruction, not only absorb and not exclusively can continue to cause environmental pollution, also can affect normal production simultaneously.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind ofly have compared with low viscosity, good absorbing effect, be not easy to stop up, the preparation method of energy consumption is little, cost is low flue gas desulfurization zinc oxide slurries.
For achieving the above object, the technical solution used in the present invention is:
A preparation method for zinc oxide slurries for flue gas desulfurization, comprises the following steps:
(1) water, zinc oxide are mixed and made into zinc oxide slurries;
(2) alkanolamine, inorganic salts and surfactant are mixed;
(3) mixture of step (2) gained is added in the zinc oxide slurries of step (1).
In described step (1), in zinc oxide slurries, the weight percentage of zinc oxide is 35%-75%.
In described step (2), the part by weight of alkanolamine, inorganic salts, surfactant is (1-2): (0.2-0.5): (0.5-1.5).
Described alkanolamine is one or both combination of triethanolamine or 2-amino-2-methyl-1-propanol.
Described inorganic salts are one or both combination of calcium chloride or sodium chloride.
Described surfactant is one or more the combination in neopelex, Tween 80, PEG 20000.
The weight of the mixture being made up of alkanolamine, inorganic salts and surfactant adding in zinc oxide slurries in described step (3) accounts for the 0.05%-0.5% of zinc oxide slurries gross weight.
Described zinc oxide slurries are for the desulfurization of smelting industry tail gas.
Adopt after technique scheme, the beneficial effect that the present invention reaches is:
(1) alkanolamine of the present invention, inorganic salts and surfactant add to after mixing has increased contacting of flue gas and zinc oxide slurries in zinc oxide slurries, the oxidized zinc slurries of sulfur dioxide in flue gas are fully absorbed, thereby reach the object of thorough desulfurization;
(2) the present invention has reduced the viscosity of zinc oxide slurries by add the mixture being made up of alkanolamine, inorganic salts and surfactant in zinc oxide slurries, has reduced sedimentation, has significantly improved zinc oxide slurries and has flowed, and has avoided the phenomenons such as obstruction.
Therefore, the inventive method is simple, pollution-free, cost is low, and the zinc oxide slurries that simultaneously contain the mixture being made up of alkanolamine, inorganic salts and surfactant can significantly improve the assimilation effect of sulfur dioxide, reduces zinc oxide paste fluid viscosity, avoid the obstruction in production process, further reduce pollution, saved resource, improved economic benefit.
Detailed description of the invention
The invention will be further described by the following examples, its objective is in order to understand better content of the present invention, but it does not limit the scope of the invention.
embodiment 1
(1) first water and zinc oxide are mixed and made into zinc oxide slurries by weight the ratio that is 1:1;
(2) part by weight of triethanolamine (TEA), sodium chloride (NaCl), Tween 80 being pressed to 1.2:0.4:0.5 mixes;
(3) mixture of being made up of triethanolamine (TEA), sodium chloride (NaCl), Tween 80 is added and in zinc oxide slurries, made the flue gas desulfurization zinc oxide slurries that contain the mixture being made up of triethanolamine (TEA), sodium chloride (NaCl), Tween 80 in 0.2% ratio of zinc oxide slurries gross weight.With these zinc oxide slurries to Mou Xin smeltery containing SO
2concentration is 12000mg/m
3flue gas carry out desulfurization, after testing, SO in the tail gas after desulfurization
2content is 450 mg/m
3.
embodiment 2
(1) first water and zinc oxide are mixed and made into zinc oxide slurries by weight the ratio that is 1:0.54;
(2) by triethanolamine (TEA), calcium chloride (CaCl
2), PEG 20000 presses 2:0:5: 1.5 part by weight mixes;
(3) will be by triethanolamine (TEA), calcium chloride (CaCl
2), the mixture made of PEG 20000 adds in zinc oxide slurries and makes and contain by triethanolamine (TEA), calcium chloride (CaCl in 0.05% ratio of zinc oxide slurries gross weight
2), the flue gas desulfurization zinc oxide slurries of the mixture of PEG 20000 composition.With these zinc oxide slurries to Mou Xin smeltery containing SO
2concentration is 10000 mg/m
3flue gas carry out desulfurization, after testing, SO in the tail gas after desulfurization
2content is 200mg/m
3.
embodiment 3
(1) first water and zinc oxide are mixed and made into zinc oxide slurries by weight the ratio that is 1:3;
(2) by 2-amino-2-methyl-1-propanol, calcium chloride (CaCl
2), neopelex press 1:0.2:0.5 part by weight mix;
(3) by 2-amino-2-methyl-1-propanol, calcium chloride (CaCl
2), the mixture made of neopelex adds in zinc oxide slurries and makes and contain by 2-amino-2-methyl-1-propanol, calcium chloride (CaCl in 0.5% ratio of zinc oxide slurries gross weight
2), the flue gas desulfurization zinc oxide slurries of the mixture of neopelex composition.With these zinc oxide slurries to Mou Xin smeltery containing SO
2concentration is 15000 mg/m
3flue gas carry out desulfurization, after testing, SO in the tail gas after desulfurization
2content is 190mg/m
3.
embodiment 4
(1) first water and zinc oxide are mixed and made into zinc oxide slurries by weight the ratio that is 1:2;
(2) by 2-amino-2-methyl-1-propanol (AMP), calcium chloride (CaCl
2), PEG 20000 press 2:0.3:1.2 part by weight mix;
(3) by 2-amino-2-methyl-1-propanol (AMP), calcium chloride (CaCl
2), the mixture made of PEG 20000 adds in zinc oxide slurries and makes and contain by 2-amino-2-methyl-1-propanol (AMP), calcium chloride (CaCl in 0.3% ratio of zinc oxide slurries gross weight
2), the flue gas desulfurization zinc oxide slurries of the mixture of PEG 20000 composition.With these zinc oxide slurries to Mou Xin smeltery containing SO
2concentration is 12000mg/m
3flue gas carry out desulfurization, after testing, SO in the tail gas after desulfurization
2content is 180mg/m
3.
Claims (8)
1. a preparation method for zinc oxide slurries for flue gas desulfurization, comprises the following steps:
(1) water, zinc oxide are mixed and made into zinc oxide slurries;
(2) alkanolamine, inorganic salts and surfactant are mixed;
(3) mixture of step (2) gained is added in the zinc oxide slurries of step (1).
2. the preparation method of zinc oxide slurries for a kind of flue gas desulfurization according to claim 1, is characterized in that: in described step (1), in zinc oxide slurries, the weight percentage of zinc oxide is 35%-75%.
3. the preparation method of zinc oxide slurries for a kind of flue gas desulfurization according to claim 1, is characterized in that: in described step (2), the part by weight of alkanolamine, inorganic salts, surfactant is (1-2): (0.2-0.5): (0.5-1.5).
4. the preparation method of zinc oxide slurries for a kind of flue gas desulfurization according to claim 1, is characterized in that: described alkanolamine is one or both combination of triethanolamine or 2-amino-2-methyl-1-propanol.
5. the preparation method of zinc oxide slurries for a kind of flue gas desulfurization according to claim 1, is characterized in that: described inorganic salts are one or both combination of calcium chloride or sodium chloride.
6. the preparation method of zinc oxide slurries for a kind of flue gas desulfurization according to claim 1, is characterized in that: described surfactant is one or more the combination in neopelex, Tween 80, PEG 20000.
7. the preparation method of zinc oxide slurries for a kind of flue gas desulfurization according to claim 1, is characterized in that: the weight of the mixture being made up of alkanolamine, inorganic salts and surfactant adding in zinc oxide slurries in described step (3) accounts for the 0.05%-0.5% of zinc oxide slurries gross weight.
8. according to the prepared a kind of flue gas desulfurization zinc oxide slurries of claim 1, it is characterized in that: described zinc oxide slurries are for the desulfurization of smelting industry tail gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134932.5A CN103908885A (en) | 2014-04-04 | 2014-04-04 | Preparation method and application of zinc oxide slurry for flue gas desulfurization |
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|---|---|---|---|
| CN201410134932.5A CN103908885A (en) | 2014-04-04 | 2014-04-04 | Preparation method and application of zinc oxide slurry for flue gas desulfurization |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873673A (en) * | 1971-09-07 | 1975-03-25 | Monsanto Co | Wet scrubbing of flue gas for SO{HD x {b removal |
| CN1163925A (en) * | 1996-11-15 | 1997-11-05 | 覃戊文 | Combustion enhancing sweetening agent |
| CN1531991A (en) * | 2003-03-18 | 2004-09-29 | 于文波 | Sulfur dioxide removing agent |
| CN102755826A (en) * | 2012-07-06 | 2012-10-31 | 江苏恒丰伟业科技工程有限公司 | Tail gas desulfuration adopting zinc oxide method in smelting industry |
-
2014
- 2014-04-04 CN CN201410134932.5A patent/CN103908885A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873673A (en) * | 1971-09-07 | 1975-03-25 | Monsanto Co | Wet scrubbing of flue gas for SO{HD x {b removal |
| CN1163925A (en) * | 1996-11-15 | 1997-11-05 | 覃戊文 | Combustion enhancing sweetening agent |
| CN1531991A (en) * | 2003-03-18 | 2004-09-29 | 于文波 | Sulfur dioxide removing agent |
| CN102755826A (en) * | 2012-07-06 | 2012-10-31 | 江苏恒丰伟业科技工程有限公司 | Tail gas desulfuration adopting zinc oxide method in smelting industry |
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Address after: 225400, No. 68, Huan Xi Road, Taixing City Industrial Zone, Jiangsu, Taizhou Applicant after: JIANGSU LANDIAN ENVIRONMENTAL PROTION CO., LTD. Address before: 225400, Zhenxing Road, Taixing Industrial Zone, Taizhou, Jiangsu 6, China Applicant before: TAIXING ELECTROSTATIC PRECIPITATION EQUIPMENT FACTORY CO., LTD. |
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Application publication date: 20140709 |