CN101429070B - Method for producing azophoska complex fertilizer with boiler flue gas and sulphuric acid tail gas - Google Patents
Method for producing azophoska complex fertilizer with boiler flue gas and sulphuric acid tail gas Download PDFInfo
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- CN101429070B CN101429070B CN200810237751XA CN200810237751A CN101429070B CN 101429070 B CN101429070 B CN 101429070B CN 200810237751X A CN200810237751X A CN 200810237751XA CN 200810237751 A CN200810237751 A CN 200810237751A CN 101429070 B CN101429070 B CN 101429070B
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- desulfurizing tower
- fume desulfurizing
- sulfuric acid
- tower
- tail gas
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Abstract
The invention provides a method for preparing a nitrogen-phosphorus-kalium compound fertilizer from boiler flue gas and vitriol tail gas. The method comprises the followings steps: the boiler flue gas and vitriol tail gas are sent to a first flue gas desulfurization tower and added with ammonia to generate imide solution containing ammonium bisulfite and ammonium sulfite; the gas is sent to a second flue gas desulfurization tower and is added with ammonia to further perform desulfurization and washing and exhaust the gas; the partial imide solution in the second flue gas desulfurization tower is returned to the first flue gas desulfurization tower for cyclical washing; the partial imide solution in the first flue gas desulfurization tower is sent to a reaction tank and added with phosphoric acid to displace SO2 from the imide solution, and the reaction slime is sent to a SO2 desorption tower to analyze the SO2 by air; the SO2 obtained by displacement and analysis is used to produce vitriol; the vitriol is used to produce the phosphoric acid; the phosphoric acid is sent to the reaction tank for recycling; and the reaction slime in the SO2 desorption tower is finally injected in a nitrogen-phosphorus-kalium compound fertilizer slime tank, evenly mixed with KC1 and conveyed to a slime spraying granulation compound fertilizer producing device to produce the NPK compound fertilizer.
Description
Technical field
The present invention relates to handle the processing method of boiler smoke, sulfuric acid tail gas, specifically is the method for utilizing boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer.
Background technology
SO in present boiler smoke, the sulfuric acid tail gas
2The improvement method roughly has several: limestone powder method, lime white method, ammoniacal liquor method etc.Wingdale is divided into dry desulfurization, only limits to boiler flue gas desulfurization, and sulphur enters in the slag; Lime white method, ammoniacal liquor method are fit to SO in boiler smoke, the sulfuric acid tail gas
2Administer, but the gypsum that the lime white method generates, use is very little, forms solid useless again; Ammoniacal liquor method by-product imonium or sulphur ammonium as fertilizer sources, but added value is low, also bad sale.
Summary of the invention
In order to overcome the shortcoming that above-mentioned prior art exists, the object of the present invention is to provide a kind of method of utilizing boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer, it makes full use of the sulphur resource in the flue gas, with a kind of production technique that flue gas treatment technology, sulfuric acid, phosphoric acid, nitrogen-phosphorus-potassium compound fertilizer production technology are joined together, improved the utilization ratio of flue gas, sulfuric acid tail gas.
Technical scheme of the present invention is: utilize boiler smoke and sulfuric acid tail gas to produce the method for nitrogen-phosphorus-potassium compound fertilizer, it is characterized in that may further comprise the steps:
1) desulfurization thickening and washing: boiler smoke, sulfuric acid tail gas are delivered in first fume desulfurizing tower, and in first fume desulfurizing tower, adding ammoniacal liquor, sulfuric acid tail gas in ammoniacal liquor and the tower and the reaction of the acid gas in the boiler smoke generate the imonium liquid that contains ammonium bisulfite and ammonium sulphite; Simultaneously the top of the scum dredger in first fume desulfurizing tower downwards spray irrigation water prevent that scum dredger from blocking;
Boiler smoke, sulfuric acid tail gas after the first fume desulfurizing tower desulfurization washing concentrating are delivered to second fume desulfurizing tower, also add ammoniacal liquor in second fume desulfurizing tower, and simultaneously the top of the scum dredger in second fume desulfurizing tower downwards spray irrigation water prevent that scum dredger from blocking; After realization was washed boiler smoke, the further desulfurization of sulfuric acid tail gas, gas was discharged through the chimney of second fume desulfurizing tower; A washings part that contains ammonium bisulfite and ammonium sulphite that generates is back to the cat head of second fume desulfurizing tower through second desulfur pump, spray is to boiler smoke, sulfuric acid tail gas circulation cleaning downwards, and another part is carried back the washing of the first fume desulfurizing tower internal recycle through second desulfur pump;
Because enter higher, the SO of the gas temperature of first fume desulfurizing tower
2Concentration is higher, and cycles of washing liquid Central Asia ammonium concentration is improved and transpiring moisture, evaporation concentration, raising imonium content; First fume desulfurizing tower plays inspissated;
2) displacement, parsing SO
2: an imonium liquid part that contains ammonium bisulfite and ammonium sulphite that obtains in first fume desulfurizing tower is transported to the cat head of first fume desulfurizing tower by first desulfur pump, and spray washs boiler smoke, sulfuric acid tail gas downwards then; Another part is transported in the reactive tank by first desulfur pump, and adds phosphoric acid in reactive tank, stirs, with SO
2From imonium liquid, cement out, then the reaction slurry that obtains is delivered to SO by first shurry pump
2Desorption tower used, at SO
2Utilize air with dissolved SO in the reaction slurry in desorption tower used
2Parse;
The SO that parses
2Gas with at the mid-SO that gets in return of reactive tank
2Gas enters scum dredger together, is used to produce sulfuric acid then; The sulfuric acid of producing is used further to produce phosphoric acid; The phosphoric acid of producing is delivered in the reactive tank again, thereby forms recycle;
3) reaction slurry in desorption tower used enters and takes off the analysis of material stock tank, squeezes into the NpK complex fertilizer stock tank by second shurry pump then, after the KCl mixing and stirring, is transported to spray granulating composite fertilizer production equipment by the NpK complex fertilizer stock pump and produces NPK composite fertilizer.
As further technical scheme of the present invention:
First fume desulfurizing tower, second fume desulfurizing tower all adopt the top to be provided with the spray void tower of the glass reinforced plastic material of traverse baffle scum dredger; Empty tower gas velocity 1.6m/s; Contain SO in boiler smoke and the sulfuric acid tail gas altogether
2Concentration 800～4000ppm; Ammonia concn 18～25%.
By regulating the amount of the ammoniacal liquor that first fume desulfurizing tower adds, make that the mass ratio of ammonium bisulfite and ammonium sulphite is 3:1 in the washings in first fume desulfurizing tower, total concn 550～the 650g/L of ammonium bisulfite and ammonium sulphite, washings density 1.22～1.24g/cm
3By regulating the amount of the ammoniacal liquor that second fume desulfurizing tower adds, make the ratio 3:1 of ammonium bisulfite and ammonium sulphite in the washings in second fume desulfurizing tower, total concn 400～the 450g/L of ammonium bisulfite and ammonium sulphite, washings density 1.18～1.20g/cm
3
Enter the reaction slurry in the nitrogen-phosphorus-potassium compound fertilizer reaction material stock tank, the density after mixing with KCL is 1.4～1.43g/cm
3
Described reactive tank adopts the steel lining plastic structure, in establish line with rubber and stir, mixing speed is 60r/min.
Described SO
2Desorption tower used with take off the analysis of material stock tank and adopt tower groove integrative-structure, SO
2Desorption tower used employing glass-reinforced plastic material is made, take off the analysis of material stock tank and adopt the steel lining plastic structure, in establish line with rubber and stir, mixing speed is 36r/min.
Described NpK complex fertilizer stock tank adopts the steel lining plastic structure, in establish line with rubber and stir, stir and be rotating speed 60r/min.
The invention has the beneficial effects as follows: it makes full use of the sulphur resource in the flue gas, a kind of new process of production that flue gas treatment technology, sulfuric acid, phosphoric acid, nitrogen-phosphorus-potassium compound fertilizer production technology are joined together, belong to the recycling economy project, improved the added value of flue gas, sulfuric acid tail gas.
Description of drawings
Accompanying drawing 1 is a process structure synoptic diagram of the present invention,
Among the figure: 1 first fume desulfurizing tower, 2 first desulfur pumps, 3 second fume desulfurizing towers, 31 chimneys, 4 second desulfur pumps, 5 reactive tanks, 6 first shurry pumps, 7 SO
2Desorption tower used, 8 take off the analysis of material stock tank, 9 NpK complex fertilizer stock tanks, 10 NpK complex fertilizer stock pumps, 11 scum dredgers, 12 sulfuric acid production plants, 13 phosphoric acid production devices, 14 spray granulating nitrogen-phosphorus-potassium compound fertilizer production equipments, 15 second shurry pumps.
Embodiment
As shown in Figure 1, the method that this utilizes boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer is characterized in that may further comprise the steps:
1) desulfurization thickening and washing: boiler smoke, sulfuric acid tail gas are delivered in first fume desulfurizing tower 1, and in first fume desulfurizing tower 1, add ammoniacal liquor, ammonia concn 18～25%.Sulfuric acid tail gas in ammoniacal liquor and the tower and the reaction of the acid gas in the boiler smoke generate the imonium liquid that contains ammonium bisulfite and ammonium sulphite.By regulating the amount of the ammoniacal liquor that adds in first fume desulfurizing tower 1, make that the ratio of ammonium bisulfite and ammonium sulphite is that mass ratio is 3:1 in the washings in this tower, total concn 550～the 650g/L of ammonium bisulfite and ammonium sulphite, washings density 1.22～1.24g/cm
3Scum dredger in first fume desulfurizing tower top spray irrigation water downwards prevents that scum dredger from blocking simultaneously.
Boiler smoke, sulfuric acid tail gas after first fume desulfurizing tower, 1 desulfurization washing concentrating are delivered to second fume desulfurizing tower 3.Also add ammoniacal liquor in second fume desulfurizing tower 3, ammonia concn 18～25%.And prevent that from second fume desulfurizing tower, the 3 interior downward spray irrigation water in scum dredger top scum dredger from blocking simultaneously.Realize that in second fume desulfurizing tower 3 gas is that tail gas is discharged through the chimney 31 of second fume desulfurizing tower, contains SO in boiler smoke and the sulfuric acid tail gas altogether to after boiler smoke, the further desulfurization washing of sulfuric acid tail gas
2Concentration 800～4000ppm.The washings that contains ammonium bisulfite and ammonium sulphite that generates in second fume desulfurizing tower 3, a part is back to the cat head of second fume desulfurizing tower 3 through second desulfur pump 4, spray is to boiler smoke, sulfuric acid tail gas circulation cleaning downwards, and another part is carried back the washing of first fume desulfurizing tower, 1 internal recycle through second desulfur pump 4.By regulating the amount of the ammoniacal liquor that second fume desulfurizing tower 3 adds, make that the ratio of ammonium bisulfite and ammonium sulphite is 3:1 in the washings in this tower, the total concn 400～450g/L of ammonium bisulfite and ammonium sulphite, washings density is 1.18～1.20g/cm
3
Because enter higher, the SO of the gas temperature of first fume desulfurizing tower
2Concentration is higher, and cycles of washing liquid Central Asia ammonium concentration is improved and transpiring moisture, evaporation concentration, raising imonium content; First fume desulfurizing tower plays inspissated.
First fume desulfurizing tower 1, second fume desulfurizing tower 3 all adopt the top to be provided with the spray void tower of the glass reinforced plastic material of traverse baffle scum dredger, empty tower gas velocity 1.6m/s.Glass reinforced plastic is corrosion-resistant, anti-aging, wear-resisting, the work-ing life of energy prolong smoke thionizer, and cost is low.
2) displacement, parsing SO
2: an imonium liquid part that contains ammonium bisulfite and ammonium sulphite that obtains in first fume desulfurizing tower 1 is transported to the cat head of first fume desulfurizing tower 1 by first desulfur pump 2, and spray washs boiler smoke, sulfuric acid tail gas downwards then; Another part is transported in the reactive tank 5 by first desulfur pump 2, and reactive tank 5 adopts the steel lining plastic structures, in establish line with rubber and stir, and in reactive tank 5, add phosphoric acid, stir, mixing speed is 60r/min, with SO
2From imonium liquid, cement out.Then the reaction slurry that obtains is delivered to SO by first shurry pump 6
2Desorption tower used 7, at SO
2Utilize air with dissolved SO in the reaction slurry in desorption tower used 7
2Parse.SO
2Desorption tower used 7 adopt glass-reinforced plastic material to make.
The SO that parses
2Gas with at the reactive tank 3 mid-SO that get in return
2Gas enters scum dredger 11 together, is delivered to sulfuric acid production plant 12 then and is used to produce sulfuric acid.The sulfuric acid of producing is delivered to phosphoric acid production device 13 again and is used to produce phosphoric acid.The phosphoric acid of producing is delivered in the reactive tank again, thereby forms recycle.
3) SO
2Desorption tower used 7 li reaction slurry enter its below one with it take off analysis of material stock tank 8, take off analysis of material stock tank 8 and adopt the steel lining plastic structures, in establish line with rubber and stir, mixing speed is 36r/min.Squeeze into NpK complex fertilizer stock tank 9 by second shurry pump 15 then, NpK complex fertilizer stock tank 9 adopts the steel lining plastic structures, in establish line with rubber and stir, after the KCl mixing and stirring, stir and be rotating speed 60r/min.Pulp density density after stirring is 1.4～1.43g/cm
3, be transported to spray granulating composite fertilizer production equipment 14 by NpK complex fertilizer stock pump 10 then and produce NPK composite fertilizer.Wherein the amount of KCl contains K amount according to production composite fertilizer difference and carries out proportioning and calculate.
Claims (6)
1. utilize boiler smoke and sulfuric acid tail gas to produce the method for nitrogen-phosphorus-potassium compound fertilizer, it is characterized in that may further comprise the steps:
1) desulfurization thickening and washing: boiler smoke and sulfuric acid tail gas are delivered in first fume desulfurizing tower, and in first fume desulfurizing tower, adding ammoniacal liquor, sulfuric acid tail gas in ammoniacal liquor and the tower and the reaction of the acid gas in the boiler smoke generate the imonium liquid that contains ammonium bisulfite and ammonium sulphite; Simultaneously the top of the scum dredger in first fume desulfurizing tower downwards spray irrigation water prevent that scum dredger from blocking;
Boiler smoke, sulfuric acid tail gas after first fume desulfurizing tower desulfurization washing are delivered to second fume desulfurizing tower, also add ammoniacal liquor in second fume desulfurizing tower, and simultaneously the top of the scum dredger in second fume desulfurizing tower downwards spray irrigation water prevent that scum dredger from blocking; After realization was washed boiler smoke, the further desulfurization of sulfuric acid tail gas, gas was discharged through the chimney of second fume desulfurizing tower; A washings part that contains ammonium bisulfite and ammonium sulphite that generates is back to the cat head of second fume desulfurizing tower through second desulfur pump, spray is to boiler smoke, sulfuric acid tail gas circulation cleaning downwards, and another part is carried back the washing of the first fume desulfurizing tower internal recycle through second desulfur pump;
Because enter higher, the SO of the gas temperature of first fume desulfurizing tower
2Concentration is higher, and cycles of washing liquid Central Asia ammonium concentration is improved and transpiring moisture, evaporation concentration, raising imonium content; First fume desulfurizing tower plays inspissated;
2) displacement, parsing SO
2: an imonium liquid part that contains ammonium bisulfite and ammonium sulphite that obtains in first fume desulfurizing tower is transported to the cat head of first fume desulfurizing tower by first desulfur pump, and spray washs boiler smoke, sulfuric acid tail gas downwards then; Another part is transported in the reactive tank by first desulfur pump, and adds phosphoric acid in reactive tank, stirs, with SO
2From imonium liquid, cement out, then the reaction slurry that obtains is delivered to SO by first shurry pump
2Desorption tower used, at SO
2Utilize air with dissolved SO in the reaction slurry in desorption tower used
2Parse;
The SO that parses
2Gas with at the mid-SO that gets in return of reactive tank
2Gas enters scum dredger together, is used to produce sulfuric acid then; The sulfuric acid of producing is used further to produce phosphoric acid; The phosphoric acid of producing is delivered in the reactive tank again, thereby forms recycle;
3) reaction slurry in desorption tower used enters and takes off the analysis of material stock tank, squeezes into the NpK complex fertilizer stock tank by second shurry pump then, after the KCl mixing and stirring, is transported to spray granulating composite fertilizer production equipment by the NpK complex fertilizer stock pump and produces NPK composite fertilizer;
First fume desulfurizing tower, second fume desulfurizing tower all adopt the top to be provided with the spray void tower of the glass reinforced plastic material of traverse baffle scum dredger; Empty tower gas velocity 1.6m/s; Contain SO in boiler smoke and the sulfuric acid tail gas altogether
2Concentration 800～4000ppm; Ammonia concn 18～25%.
2. the method for utilizing boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer according to claim 1, it is characterized in that: by regulating the amount of the ammoniacal liquor that first fume desulfurizing tower adds, make that the mass ratio of ammonium bisulfite and ammonium sulphite is 3: 1 in the washings in first fume desulfurizing tower, total concn 550～the 650g/L of ammonium bisulfite and ammonium sulphite, washings density 1.22～1.24g/cm
3By regulating the amount of the ammoniacal liquor that second fume desulfurizing tower adds, make the ratio 3: 1 of ammonium bisulfite and ammonium sulphite in the washings in second fume desulfurizing tower, total concn 400～the 450g/L of ammonium bisulfite and ammonium sulphite, washings density 1.18～1.20g/cm
3
3. the method for utilizing boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer according to claim 1, it is characterized in that: enter the reaction slurry in the nitrogen-phosphorus-potassium compound fertilizer reaction material stock tank, the density after mixing with KCL is 1.4～1.43g/cm
3
4. the method for utilizing boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer according to claim 1 is characterized in that: described reactive tank adopts the steel lining plastic structure, in establish line with rubber and stir, mixing speed is 60r/min.
5. the method for utilizing boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer according to claim 1 is characterized in that: described SO
2Desorption tower used with take off the analysis of material stock tank and adopt tower groove integrative-structure, SO
2Desorption tower used employing glass-reinforced plastic material is made, take off the analysis of material stock tank and adopt the steel lining plastic structure, in establish line with rubber and stir, mixing speed is 36r/min.
6. the method for utilizing boiler smoke and sulfuric acid tail gas to produce nitrogen-phosphorus-potassium compound fertilizer according to claim 1 is characterized in that: described NpK complex fertilizer stock tank adopts the steel lining plastic structure, in establish line with rubber and stir, stir and be rotating speed 60r/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810237751XA CN101429070B (en) | 2008-12-05 | 2008-12-05 | Method for producing azophoska complex fertilizer with boiler flue gas and sulphuric acid tail gas |
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| CN200810237751XA CN101429070B (en) | 2008-12-05 | 2008-12-05 | Method for producing azophoska complex fertilizer with boiler flue gas and sulphuric acid tail gas |
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| CN101429070A CN101429070A (en) | 2009-05-13 |
| CN101429070B true CN101429070B (en) | 2011-05-04 |
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| CN104496605B (en) * | 2014-12-24 | 2017-06-06 | 金正大诺泰尔化学有限公司 | The method and device of sulphur dioxide production alkaline fertilizer in a kind of recycling furnace gas |
| CN105502465A (en) * | 2015-12-31 | 2016-04-20 | 贵州开磷集团股份有限公司 | Comprehensive utilization method of ammonium sulfate solution |
| CN107597797A (en) * | 2017-09-15 | 2018-01-19 | 山东百川同创能源有限公司 | The high instant joint disposal of wet basis Chinese medicine slag energy utilizes system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194176A (en) * | 1997-03-21 | 1998-09-30 | 沈阳环境科学研究所 | New technology for absorbing and eliminating sulfur dioxide in smoke chemically |
| KR20020044254A (en) * | 2000-12-05 | 2002-06-15 | 이구택 | Method for treating tail gas in sintering process |
| WO2004022205A1 (en) * | 2002-09-09 | 2004-03-18 | East China University Of Science & Technology | Method and apparatus for eliminating and recovering s02 from fume |
| CN1736559A (en) * | 2005-07-15 | 2006-02-22 | 洛阳市天誉环保工程有限公司 | Ammonia-ammonia sulfate dry type flue gas desulfurizing denitrifying equipment and technique |
-
2008
- 2008-12-05 CN CN200810237751XA patent/CN101429070B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194176A (en) * | 1997-03-21 | 1998-09-30 | 沈阳环境科学研究所 | New technology for absorbing and eliminating sulfur dioxide in smoke chemically |
| KR20020044254A (en) * | 2000-12-05 | 2002-06-15 | 이구택 | Method for treating tail gas in sintering process |
| WO2004022205A1 (en) * | 2002-09-09 | 2004-03-18 | East China University Of Science & Technology | Method and apparatus for eliminating and recovering s02 from fume |
| CN1736559A (en) * | 2005-07-15 | 2006-02-22 | 洛阳市天誉环保工程有限公司 | Ammonia-ammonia sulfate dry type flue gas desulfurizing denitrifying equipment and technique |
Non-Patent Citations (1)
| Title |
|---|
| 张新利.氨水法在烧结烟气脱硫中的应用.《山西科技》.2006,(第4期),112-113. * |
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