CN1071097A - Handle the method for waste gas containing fluoride - Google Patents
Handle the method for waste gas containing fluoride Download PDFInfo
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- CN1071097A CN1071097A CN 91109344 CN91109344A CN1071097A CN 1071097 A CN1071097 A CN 1071097A CN 91109344 CN91109344 CN 91109344 CN 91109344 A CN91109344 A CN 91109344A CN 1071097 A CN1071097 A CN 1071097A
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Abstract
The processing method of waste gas containing fluoride.Adopt " four towers " flow process, replenish clear water and add the 3rd, two and one tower by the 4th tower, adopt the acid of overflow string, to guarantee and to stablize the recycle acid operation concentration of each tower, be provided with the fluosilicic acid shower nozzle in the gas pipeline to solve the silica gel blockage problem, tower groove one reduces floor space.Be a kind of absorptivity height, device good airproof performance, the process of the processing waste gas containing fluoride of convenient operation and management.Can administer the pollution of waste gas containing fluoride effectively, the protection environment, and waste gas can be reclaimed again, make the high fluosilicic acid product of concentration, turn waste into wealth, increase the economic benefit of factory.
Description
The present invention is a kind of processing method of waste gas containing fluoride, is applicable to the processing of waste gas containing fluoride in the production of acid system phosphate fertilizer and phosphoric acid by wet process, is specially adapted to the absorption of the waste gas containing fluoride that produces in the Production of Single Superphosphate is handled.
Rock phosphate in powder is the important source material of phosphate fertilizer and phosphoric acid production, and the main component of rock phosphate in powder is a fluor-apatite, and in the acid system phosphate fertilizer of usefulness inorganic acid decomposing phosphate rock stone and the production of phosphoric acid by wet process, using more inorganic acid is sulfuric acid.In the process that acid and rock phosphate in powder react, fluorine in the rock phosphate in powder changes into hydrofluoric acid (HF), under the situation that has silica to exist, overflow with the form of ocratation again, escaped quantity accounts for the 40-50% of rock phosphate in powder fluorinated volume, and the waste gas of producing one ton of calcium superphosphate discharge is about the 250-300 cubic meter.The harm of " three wastes " in the Production of Single Superphosphate mainly is the harm of fluorine, and the toxicity of fluorine is big, and environment is caused serious pollution.Therefore, how waste gas containing fluoride effectively being absorbed processing, is the problem that can not be ignored in the Production of Single Superphosphate.Up to now, in production of phosphate fertilizer the absorption flow process that adopts " one tower, three foam removals of two Room ", promptly with two tubular drying wheel absorption chambers, three demisters of a jet cleaning tower (or churning tower).This flow process exists following problems (1) fluorine absorptivity lower, and most enterprises do not reach discharging standards; (2) Zhuan Zhi dynamic sealing point is more, and the leakage problem of equipment is difficult for solving, and influences operating environment; (3) product (fluosilicic acid) concentration low (8-12%) of absorption gained; (4) equipment and pipeline easily for silica gel stops up, clean difficulty.
Purpose of the present invention is to provide a kind of fluorine absorptivity height, and the device dynamic sealing point is few, and operating condition is better, the method for the processing waste gas containing fluoride of convenient management, thereby the pollution of administering waste gas containing fluoride effectively, protection environment; And waste gas can be reclaimed again, make the high fluosilicic acid product of concentration, turn waste into wealth, increase the economic benefit of factory.
Content of the present invention is, use water as absorbent, the absorption of adopting four absorption towers to carry out waste gas containing fluoride is handled, and first tower is a spray absorber, second tower is a spray cup absorber, the 3rd tower is a spray absorber, and the 4th tower is a rotating stream tray scrubber, replenishes clear water and is added by the 4th tower, three, two and one tower, adopt the acid of overflow string,, improve the fluorine absorptivity to guarantee and to stablize the recycle acid operation concentration of each tower.Be provided with the fluosilicic acid shower nozzle in the gas pipeline to solve the silica gel blockage problem, tower groove one, easy cleaning, minimizing floor space.Select for use the exhausting amount than the twice line with rubber air exhauster of general design air flow, be lower than 60 ℃ to guarantee intrasystem operating temperature.Whole materials of the equipment pipe in the absorption system all adopt PVC-U.The fluosilicic acid circulation fluid adopts the circulation of line with rubber pumping each tower self to absorb.
Accompanying drawing is a process flow diagram of the present invention.
Spray absorber (1), spray cup absorber (2), spray absorber (3), rotating stream tray scrubber (4) air exhauster (5), fluosilicic acid circulating pump (6,7,8,9), fluosilicic acid discharge pump (10), rare fluosilicic acid pump (11), plastic vertical pump (12), pan tank (13), rare fluosilicic acid storage tank (14), underground tank (15).
Below in conjunction with accompanying drawing and embodiment shown in the drawings, the present invention is further detailed explanation, but summary of the invention is not limited to shown in the accompanying drawing.
Embodiment:
Be used for calcium superphosphate fluorine absorption system (100,000 tons of general calcium/years of production capacity), adopt process of the present invention, total fluorine absorptivity is up to 99.95%, fluoro-gas enter absorption tower (1) in tower by by after the washing of the fluosilicic acid circulation fluid counter-current absorption under the top spray, come out from cat head, enter by spray cup absorber (2) top, fluorine is absorbed by catadromous fluosilicic acid circulation fluid in tower, come out from the bottom of tower then, enter the bottom of spray absorber (3), in tower,, come out, enter the rotating stream tray scrubber bottom from top of tower by after the fluosilicic acid circulation fluid counter-current absorption.Absorb circulation fluid and enter, in tower, after the washing of 5 blocks of column plates, enter the eddy flow defoaming plate on top, come out to enter air exhauster (5), deliver to 35 meters aiutage discharging from cat head by rotating stream tray scrubber top.The clear water that replenishes adds from the 4th tower, later overflow successively is to the operation concentration of last tower with stable its circulation fluosilicic acid of control, the byproduct fluosilicic acid leads to fluosilicic acid pan tank (13) from first absorption tower, later on again by fluosilicic acid discharge pump (10), deliver to storage tank and sell.After flushing sewage is collected by rare fluosilicic acid storage tank (14) and underground tank (15), send for flush cycle by rare fluosilicic acid pump (11) and plastic vertical pump (12) again and use or add the 3rd absorption tower, turn back in the system, form the closed circulation of without sewage discharge.
The fluosilicic acid circulating pump of first, second, third and fourth tower (6,7,8,9) is a rubber lined pump, its model is 125F7-27, the model of air exhauster (5) is a 9-19No11.2D type liner rubber blower fan, 21714 cubic metres/hour of air quantity (air quantity of general design is 10000 cubic metres/hour), blast 672mm water column, first, second, third and fourth tower is of a size of 02000 * 8000, the 4th tower bottom diameter 02800, upper diameter is 02100, and height overall 12600(unit is mm).
Fluorine absorption system measurement technology economic data is shown in table 1, table 2.
Table 1.
| One tower import | Exhaust emissions | The fluorine absorptivity | |
| Fluoro-containing concentration (Grams Per Hour. cubic meter) | Fluorine content (Grams Per Hour. cubic meter) | Discharge capacity (kg/h) | ％ |
| 12.34 | 0.012 | 0.128 | 99.86 |
| 15.53 | 0.0087 | 0.018 | 99.93 |
| 17.10 | 0.0202 | 0.178 | 99.88 |
The temperature and the concentration of table 2. circulation fluosilicic acid
| One tower | Two towers | Three towers | Four towers | |
| Temperature (℃) | 53?-?56? | 55?-?58 | 55?-?58 | 48?-?52 |
| Concentration (%) | 15.5-?18 | 4?-?10 | 1?-?4 | 0?-?1 |
The present invention compared with prior art has the following advantages:
1, absorptivity height, exhaust emissions concentration are lower than national standard 0.1 gram/cubic meter;
2, byproduct fluosilicic acid concentration height, general 15-16% reaches as high as 20-22%, for condition has been created in the utilization of fluosilicic acid;
3, because dynamic sealing point reduces, leak fewly, improve operating environment, and because waste gas absorbing system is unobstructed, whole Production of Single Superphosphate system operates under little negative pressure, and working environment is greatly improved, and has created condition for realizing cleaning civilized factory.
4, realized the totally-enclosed circulation of sewage, no waste water is discharged, and has avoided environmental pollution.
5, owing to adopted the blower fan of big air quantity, so the material of equipment and pipeline can select PVC-U cheap and easy to get for use, reduced cost.
6, tower groove one, easy cleaning has reduced floor space.
Claims (4)
1, a kind of absorbent that uses water as, the method for processing waste gas containing fluoride is characterized in that adopting four absorption towers to carry out the absorption processing of waste gas containing fluoride, first tower is a spray absorber, second tower is a spray cup absorber, and the 3rd tower is a spray absorber, and the 4th tower is a rotating stream tray scrubber, replenishing clear water is added by the 4th tower, three, two, one tower adopts the acid of overflow string, to guarantee and to stablize the operation concentration of each tower, be provided with the fluosilicic acid shower nozzle in the gas pipeline to solve silica gel blockage problem, tower groove one.
2, according to the processing method of claim 1, it is characterized in that selecting for use the exhausting amount than the twice line with rubber air exhauster of general design air flow, intrasystem operating temperature is lower than 80 ℃.
3,, it is characterized in that whole materials of the equipment pipe in the absorption system all adopt PVC-U according to claim 1,2 processing method.
4,, it is characterized in that the fluosilicic acid circulation fluid adopts the circulation of line with rubber pumping each tower self to absorb according to claim 1,2 processing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109344 CN1071097A (en) | 1991-09-28 | 1991-09-28 | Handle the method for waste gas containing fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109344 CN1071097A (en) | 1991-09-28 | 1991-09-28 | Handle the method for waste gas containing fluoride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1071097A true CN1071097A (en) | 1993-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91109344 Pending CN1071097A (en) | 1991-09-28 | 1991-09-28 | Handle the method for waste gas containing fluoride |
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| Country | Link |
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| CN (1) | CN1071097A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424007C (en) * | 2007-05-14 | 2008-10-08 | 湖北三新磷酸有限公司 | Method for absorbing and extracting phosphor and fluorin from phosphoric acid produced in kiln method |
| CN100434363C (en) * | 2006-11-03 | 2008-11-19 | 浙江三美化工有限公司 | Method of producing refined fluorosilicic acid using fluorine containing tail gas in hydrofluoric acid production device |
| CN101972584A (en) * | 2010-11-01 | 2011-02-16 | 山东聊城鲁西化工第四化肥有限公司 | Device and process for washing phosphoric acid tail gas and cogenerating sodium fluosilicate |
| CN102001666A (en) * | 2010-11-03 | 2011-04-06 | 贵州大学 | Method for producing high-purity silicon tetrafluoride in wet processing of phosphate ore |
| CN102641660A (en) * | 2012-05-09 | 2012-08-22 | 四川省川宏精细化工有限公司 | Recycling method of fluorine in fluorophlogopite process gas |
| CN103936011A (en) * | 2014-05-06 | 2014-07-23 | 瓮福（集团）有限责任公司 | Method for increasing fluorine recovery rate |
| WO2014194570A1 (en) * | 2013-06-04 | 2014-12-11 | 四川玖长科技有限公司 | Phosphorus absorption by hydration and fluorine recovery for smoke exiting kiln in kiln process for production of phosphoric acid |
| CN105180486A (en) * | 2015-08-11 | 2015-12-23 | 瓮福（集团）有限责任公司 | Method for comprehensively recycling waste heat of phosphate fertilizer plant |
| CN106587073A (en) * | 2016-12-26 | 2017-04-26 | 杨海 | Fluosilicic acid comprehensive recycling technology |
| CN107158918A (en) * | 2017-07-10 | 2017-09-15 | 临沂圣大环保工程有限公司 | A kind of nitrate method phosphoric acid tail gas defluorinate denitration process system and processing method |
| CN107281900A (en) * | 2017-06-20 | 2017-10-24 | 宁夏农丰源肥业科技有限公司 | The processing method of tail gas during calcium superphosphate is produced using Waste Sulfuric Acid |
| CN109647137A (en) * | 2019-01-04 | 2019-04-19 | 襄阳泽东化工集团有限公司 | A kind of fluorine absorption system for phosphoric acid by wet process |
-
1991
- 1991-09-28 CN CN 91109344 patent/CN1071097A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434363C (en) * | 2006-11-03 | 2008-11-19 | 浙江三美化工有限公司 | Method of producing refined fluorosilicic acid using fluorine containing tail gas in hydrofluoric acid production device |
| CN100424007C (en) * | 2007-05-14 | 2008-10-08 | 湖北三新磷酸有限公司 | Method for absorbing and extracting phosphor and fluorin from phosphoric acid produced in kiln method |
| CN101972584A (en) * | 2010-11-01 | 2011-02-16 | 山东聊城鲁西化工第四化肥有限公司 | Device and process for washing phosphoric acid tail gas and cogenerating sodium fluosilicate |
| CN102001666A (en) * | 2010-11-03 | 2011-04-06 | 贵州大学 | Method for producing high-purity silicon tetrafluoride in wet processing of phosphate ore |
| CN102001666B (en) * | 2010-11-03 | 2012-12-05 | 贵州大学 | Method for producing high-purity silicon tetrafluoride in wet processing of phosphate ore |
| CN102641660B (en) * | 2012-05-09 | 2014-09-03 | 四川省川宏精细化工有限公司 | Recycling method of fluorine in fluorophlogopite process gas |
| CN102641660A (en) * | 2012-05-09 | 2012-08-22 | 四川省川宏精细化工有限公司 | Recycling method of fluorine in fluorophlogopite process gas |
| WO2014194570A1 (en) * | 2013-06-04 | 2014-12-11 | 四川玖长科技有限公司 | Phosphorus absorption by hydration and fluorine recovery for smoke exiting kiln in kiln process for production of phosphoric acid |
| CN104211035A (en) * | 2013-06-04 | 2014-12-17 | 四川玖长科技有限公司 | Method for hydration absorption of phosphorus and recovery of fluorine from flue gas discharged from kiln of kiln-method phosphoric acid technology |
| CN104211035B (en) * | 2013-06-04 | 2016-08-31 | 四川玖长科技有限公司 | From the kiln discharge flue gas of kiln-process phosphoric acid technique, aquation inhales phosphorus and the method reclaiming fluorine |
| US10023463B2 (en) | 2013-06-04 | 2018-07-17 | Sichuan Ko Chang Technology Co., Ltd. | Phosphorus absorption by hydration and fluorine recovery for fume exiting kiln in kiln phosphoric acid process |
| CN103936011A (en) * | 2014-05-06 | 2014-07-23 | 瓮福（集团）有限责任公司 | Method for increasing fluorine recovery rate |
| CN103936011B (en) * | 2014-05-06 | 2015-11-18 | 瓮福（集团）有限责任公司 | A kind of method improving the fluorine rate of recovery |
| CN105180486A (en) * | 2015-08-11 | 2015-12-23 | 瓮福（集团）有限责任公司 | Method for comprehensively recycling waste heat of phosphate fertilizer plant |
| CN106587073A (en) * | 2016-12-26 | 2017-04-26 | 杨海 | Fluosilicic acid comprehensive recycling technology |
| CN107281900A (en) * | 2017-06-20 | 2017-10-24 | 宁夏农丰源肥业科技有限公司 | The processing method of tail gas during calcium superphosphate is produced using Waste Sulfuric Acid |
| CN107158918A (en) * | 2017-07-10 | 2017-09-15 | 临沂圣大环保工程有限公司 | A kind of nitrate method phosphoric acid tail gas defluorinate denitration process system and processing method |
| CN109647137A (en) * | 2019-01-04 | 2019-04-19 | 襄阳泽东化工集团有限公司 | A kind of fluorine absorption system for phosphoric acid by wet process |
| CN109647137B (en) * | 2019-01-04 | 2021-08-10 | 襄阳泽东化工集团有限公司 | Fluorine absorption system for wet-process phosphoric acid |
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