CN103936011A - Method for increasing fluorine recovery rate - Google Patents
Method for increasing fluorine recovery rate Download PDFInfo
- Publication number
- CN103936011A CN103936011A CN201410187320.2A CN201410187320A CN103936011A CN 103936011 A CN103936011 A CN 103936011A CN 201410187320 A CN201410187320 A CN 201410187320A CN 103936011 A CN103936011 A CN 103936011A
- Authority
- CN
- China
- Prior art keywords
- overflowing
- fluorine
- sealing groove
- overflow
- recovery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 27
- 239000011737 fluorine Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000005406 washing Methods 0.000 abstract description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 13
- 210000005056 cell body Anatomy 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006210 lotion Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Silicon Compounds (AREA)
Abstract
The invention provides a method for increasing fluorine recovery rate. The method comprises the following steps: (1) arranging overflowing ports in the upper parts of sealing grooves, and unifying the elevation of the overflowing ports of the sealing grooves; (2) interconnecting the overflowing ports of the sealing grooves through overflowing connecting pipelines; (3) keeping the installation height of the overflowing connecting pipelines consistent with the overflowing ports; (4) mounting a butterfly valve at the overflowing port of each of the sealing grooves, on each of the overflowing connecting pipelines. The method has the beneficial effects that the mechanical loss caused by tankful of fluorine washing liquid can be effectively avoided, more benefits are created for an enterprise, the environment of a production site is improved, the mechanical loss due to the recovery of fluorine can be effectively decreased, and the fluorine recovery rate is also raised. The method is applicable to the field of fluorine recovery in phosphoric acid production.
Description
Technical field
The present invention relates to phosphoric acid production technical field, furthermore, relate to the recovery of fluorine in production process of phosphoric acid, relate in particular to a kind of method that improves the fluorine rate of recovery.
Background technology
In phosphorus ore, contain fluorine, fluorine is useful precious resources, and in production process of phosphoric acid, fluorine is essential reclaims, and is to produce silicofluoric acid form to reclaim mostly.In Wet-process Phosphoric Acid Production process, part fluorine element is present in dilute phosphoric acid with silicofluoric acid form after reaction, extraction step, and a part is present in reaction flue gas with gaseous form in addition.In follow-up diluted acid concentration process due to the rising of temperature, the reduction of pressure, silicofluoric acid resolves into hydrogen fluoride and silicon tetrafluoride gas, major part is concentrated vacuum system with gaseous form and takes away, minority resides in concentrated acid, in order to ensure that this part gaseous fluorine element can efficient recovery, before spraying tail gas with recirculated water, be provided with multistage fluorine washing, be to obtain silicofluoric acid after water absorbs hydrogen fluoride and silicon tetrafluoride, most domestic producer is all two-stage washing at present, wherein to wash make up water used be cleaning water or low phosphorus-containing wastewater to secondary, one-level washing washing lotion is secondary washings, after two-stage washing, silicofluoric acid concentration can reach 13%-20% substantially, concrete production concentration is determined by washing time and concentrated load, every grade of washing is all provided with some sealing grooves, washings enters sealing groove, then remove concentration systems.The height of the fluorine rate of recovery depends primarily on internal circulating load and the concentrated load of washing lotion, and most patented technology is all conceived to improve this piece of washing lotion internal circulating load, has ignored the impact of mechanical loss on the fluorine rate of recovery.
In Chinese patent database, also there is no at present and reduce the relevant technical scheme of the mechanical loss raising fluorine rate of recovery.
Summary of the invention
Object of the present invention aims to provide a kind of mechanical loss reducing in silicofluoric acid production process, improves the method for the fluorine rate of recovery.
Reclaim mechanical loss part in silicofluoric acid production process for realizing, through field observation repeatedly, invented a kind of mechanical loss part that can effectively reduce silicofluoric acid production process and improve the method for the fluorine rate of recovery, comprise the steps:
1. on sealing groove top, overflow port is set, and each sealing groove overflow port absolute altitude is unified;
2. each sealing groove overflow port is interconnection with overflow connecting tube;
3. overflow connecting tube mounting height and overflow port are consistent;
4. on overflow connecting tube, a butterfly valve is installed at each sealing groove overflow port place.
In aforesaid method the 1st step, described sealing groove overflow port absolute altitude refers to the overflow port level height that each different size sealing groove cell body arranges;
In aforesaid method the 2nd step, described each sealing groove refers to that each producer's washing concentrating system tricks is different, has several systems just to connect the sealing groove of several systems;
In aforesaid method the 3rd step, it is for convenience of liquid-flow that described overflow connecting tube mounting height and overflow port are consistent;
In aforesaid method the 4th step, it is to avoid acid solution to flow in the cell body in maintenance while facilitating single sealing groove maintenance that butterfly valve is installed.
The invention has the beneficial effects as follows: the tankful mechanical loss of effectively having stopped fluorine washings, improved the fluorine rate of recovery, brought larger benefit to enterprise, sealing groove top is provided with overflow spout simultaneously, avoid tankful to make acid liquid corrosion cell body, improved production on-site environment.The present invention is applicable to fluorine in production process of phosphoric acid and reclaims field.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention;
In figure, 1,2,3 is sealing groove; 4,5,6 is butterfly valve; 7 is overflow connecting tube.
Embodiment
Embodiment:
Below in conjunction with accompanying drawing, the present invention will be further described.
There are three fluorine washing concentrating series in certain factory, and the sealing groove overflow of fluorine washing has been adopted to technology of the present invention, and concrete scheme is as follows:
1. by three serial fluorine washing sealing groove 1,2,3 uniform specification, on sealing groove 1,2,3 tops, overflow port is set, each sealing groove overflow port level height is consistent, and cell body adopts carbon steel line with rubber;
2. make communicating pipe with PP pipe, each sealing groove overflow port is interconnection with overflow connecting tube 7; PP tubing light weight, is convenient to raise;
3. overflow connecting tube 7 mounting heights and overflow port keep level;
4. on overflow connecting tube 7, a steel lining plastic butterfly valve 4,5,6 is installed at each sealing groove overflow port place.
In the time that three cover washing concentrating are normally driven, keep three butterfly valves often to open, ensure overflow mutually between each sealing groove; In the time that an independent series is stopped, close the butterfly valve on sealing groove, stop acid solution and flow in sealing groove.
Claims (1)
1. a method that improves the fluorine rate of recovery, comprises the steps:
1. on sealing groove top, overflow port is set, and each sealing groove overflow port absolute altitude is unified;
2. each sealing groove overflow port is interconnection with overflow connecting tube;
3. overflow connecting tube mounting height and overflow port are consistent;
4. on overflow connecting tube, a butterfly valve is installed at each sealing groove overflow port place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187320.2A CN103936011B (en) | 2014-05-06 | 2014-05-06 | A kind of method improving the fluorine rate of recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187320.2A CN103936011B (en) | 2014-05-06 | 2014-05-06 | A kind of method improving the fluorine rate of recovery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103936011A true CN103936011A (en) | 2014-07-23 |
| CN103936011B CN103936011B (en) | 2015-11-18 |
Family
ID=51183938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410187320.2A Active CN103936011B (en) | 2014-05-06 | 2014-05-06 | A kind of method improving the fluorine rate of recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103936011B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3811246A (en) * | 1973-01-16 | 1974-05-21 | W Erickson | Closed loop system for the elimination of fluorine pollution from phosphoric plants |
| US3966877A (en) * | 1974-09-11 | 1976-06-29 | Vladimir Sergeevich Kalach | Method of processing of waste gases |
| CN1071097A (en) * | 1991-09-28 | 1993-04-21 | 云南昆明磷肥厂 | Handle the method for waste gas containing fluoride |
| CN102826552A (en) * | 2012-09-18 | 2012-12-19 | 贵州开磷（集团）有限责任公司 | Method for recycling fluosilicic acid from phosphoric acid extraction tail gas |
| CN103360282A (en) * | 2013-05-16 | 2013-10-23 | 甘肃银光聚银化工有限公司 | Device and method for continuously preparing hexamethylene diisocyanate |
-
2014
- 2014-05-06 CN CN201410187320.2A patent/CN103936011B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3811246A (en) * | 1973-01-16 | 1974-05-21 | W Erickson | Closed loop system for the elimination of fluorine pollution from phosphoric plants |
| US3966877A (en) * | 1974-09-11 | 1976-06-29 | Vladimir Sergeevich Kalach | Method of processing of waste gases |
| CN1071097A (en) * | 1991-09-28 | 1993-04-21 | 云南昆明磷肥厂 | Handle the method for waste gas containing fluoride |
| CN102826552A (en) * | 2012-09-18 | 2012-12-19 | 贵州开磷（集团）有限责任公司 | Method for recycling fluosilicic acid from phosphoric acid extraction tail gas |
| CN103360282A (en) * | 2013-05-16 | 2013-10-23 | 甘肃银光聚银化工有限公司 | Device and method for continuously preparing hexamethylene diisocyanate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103936011B (en) | 2015-11-18 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 550500 Guizhou Province, Qiannan Buyei and Miao Autonomous Prefecture Fuquan Racecourse town Yingbin Road No. 1 Wengfu group Patentee after: WENGFU GROUP Co.,Ltd. Address before: 23, 550002 floor, International Building, No. 57, South City Road, Nanming District, Guiyang, Guizhou Patentee before: WENGFU GROUP Co.,Ltd. |