CN103043637A - System for recovering low-grade phosphorus from sludge - Google Patents
System for recovering low-grade phosphorus from sludge Download PDFInfo
- Publication number
- CN103043637A CN103043637A CN2012105826057A CN201210582605A CN103043637A CN 103043637 A CN103043637 A CN 103043637A CN 2012105826057 A CN2012105826057 A CN 2012105826057A CN 201210582605 A CN201210582605 A CN 201210582605A CN 103043637 A CN103043637 A CN 103043637A
- Authority
- CN
- China
- Prior art keywords
- phosphoric acid
- tank
- circulation groove
- drain pipe
- acid circulation
- 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.)
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 40
- 239000011574 phosphorus Substances 0.000 title claims abstract description 40
- 239000010802 sludge Substances 0.000 title abstract 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 108
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 54
- 238000011084 recovery Methods 0.000 claims abstract description 30
- 230000036571 hydration Effects 0.000 claims abstract description 20
- 238000006703 hydration reaction Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 239000003513 alkali Substances 0.000 claims abstract description 13
- 238000002425 crystallisation Methods 0.000 claims abstract description 12
- 230000008025 crystallization Effects 0.000 claims abstract description 12
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 11
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 19
- 239000000779 smoke Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 abstract description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 2
- 239000010452 phosphate Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract 2
- 230000008020 evaporation Effects 0.000 abstract 2
- 239000012467 final product Substances 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000003016 phosphoric acids Chemical class 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 1
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a system for recovering low-grade phosphorus from sludge. The system is mounted on a sludge phosphorus recovering system. The sludge phosphorus recovering system comprises a sludge phosphorus combustion furnace, a hydration tower, a Venturi tube, a cyclone demisting device, a wire-mesh demisting device, a tail gas combustion furnace, a phosphoric acid circulation groove and a phosphoric acid final product tank. An alkali liquid tank and a storage tank are connected with the phosphoric acid circulation groove, the liquid outlet pipe of the storage tank is connected with a filter, the liquid outlet pipe of the filter is connected with a neutralization tank, the liquid outlet pipe of the neutralization tank is connected with an evaporation/crystallization tank, the liquid outlet pipe of the evaporation/crystallization tank is connected with a centrifugal dehydration device, a liquid drain pipe and a discharge pipe are arranged on the centrifugal dehydration device, the liquid drain pipe is connected with an alkali tank, and the discharge pipe is connected with a drying machine. During recovery of poor phosphorus from sludge, P2O5 in the combustible gas of the sludge phosphorus is absorbed by an alkali liquid from the alkali tank, the absorption efficiency is greatly increased, and the resulting phosphate solution is recovered and recycled through the Neutralization, crystallization, separation and drying procedures. The whole process has reasonable configuration and high work efficiency, makes full use of heat energy, achieves the purpose of recycling liquid, and avoids waste of energy and materials.
Description
Technical field
The invention belongs to the phosphorous slurry recovery equipment technical field, relate to a kind of low-grade phosphorous slurry recovery system.
Background technology
Mud phosphorus is the by product that a kind of phosphorus of forming in the phosphorus production process and impurity mix, and main component comprises the phosphorus of 9%-50%, the solid impurity of 1%-5%, the water of 45%-90%.In the mud phosphorus; the solia particle that phosphorus is had high absorption capacity wraps up; and form a kind of emulsoid with water; at high temperature; the dipole molecule of phosphorus and water wraps up mutually; by form one deck solvation film protective layer after the hydration of the material such as silicon, iron, calcium and dust on the surface of phosphorus; protective layer has stoped the cohesion that is in contact with one another of yellow phosphorus particulate; make phosphorus be difficult to separate with other impurity; cause the recovery difficulty of phosphorus in the mud phosphorus; contain some hypertoxic phosphides in the mud phosphorus, do not deal carefully with and to cause severe contamination to environment.
Be the phosphorus composition in the efficient recovery mud phosphorus, the applicant studies and has invented patented technology " phosphorous slurry recovery system ", the patent No.: ZL201120194463.8, and this patent utilization mud phosphorus burning is to the P in the combustion gas
2O
5Carry out water-soluble recovery, in practice, obtain good result.Yet the applicant also finds in actual applications, and for the lower mud phosphorus of grade, " phosphorous slurry recovery system " although patented technology also can reclaim phosphorus composition, and the equipment cycle operation often, the time is long, and the energy that expends is many, and economical and practical property is under some influence.
Summary of the invention
The present invention is directed in the prior art, phosphorus composition in the low-grade mud phosphorus is reclaimed difficulty, there is the equipment cycle operation in existing recovery technology often, time is long, the problem that the energy that expends is many, phosphorus composition in the low-grade mud phosphorus of a kind of low-grade phosphorous slurry recovery system recoveries is provided, this system is installed in the phosphorous slurry recovery system, the phosphorous slurry recovery system includes mud phosphorus roasting kiln, the hydration tower, one-level venturi, one-level cyclone defroster device, the secondary Venturi meter, secondary whirlwind demister, the silk screen demister, tail-gas combustion stove, the strong phosphoric acid circulation groove, dilute phosphoric acid circulation groove and finished product phosphoric acid groove, the hydration tower is connected on mud phosphorus roasting kiln rear class, behind the hydration tower, be connected to one-level venturi, one-level cyclone defroster device, the secondary Venturi meter, secondary whirlwind demister, behind secondary whirlwind demister, connect the silk screen demister, tail-gas combustion stove connects silk screen demister rear class, the strong phosphoric acid circulation groove is connected on the hydration tower, one-level venturi, one-level cyclone defroster device outlet end, the dilute phosphoric acid circulation groove is connected on the secondary Venturi meter, secondary whirlwind demister, the silk screen demister, the tail-gas combustion stove lower end, the dilute phosphoric acid circulation groove has the liquid pipe to connect the strong phosphoric acid circulation groove, the strong phosphoric acid circulation groove has drain pipe to be connected into the product phosphoric acid groove, at the strong phosphoric acid circulation groove one group of liquid-inlet pipe and drain pipe are arranged, liquid-inlet pipe is connected with lye vat, drain pipe is connected with hold tank, the drain pipe of hold tank connects strainer, the drain pipe of strainer connects neutralization tank, the drain pipe of neutralization tank connects the evaporative crystallization tank, the discharge nozzle of evaporative crystallization tank connects centrifugal dehumidifier, drain pipe and discharge nozzle are installed on the centrifugal dehumidifier, drain pipe connects the alkali lye pond, discharge nozzle connects dryer, and the finished product output tube is housed on the dryer.
In the phosphorous slurry recovery system, the smoke discharge pipe of tail-gas combustion stove is connected with dryer.
Adopt technique scheme, in the phosphorous slurry recovery system, mud phosphorus is after the burning of mud phosphorus roasting kiln, and the impurity that contains in the mud phosphorus forms harmless slag, and the gas of generation is P soluble in water
2O
5Gas, P
2O
5Gas enters the hydration tower, in the hydration tower, by the soluble liquid that pumps in the strong phosphoric acid circulation groove to P
2O
5Spray, dissolve, P
2O
5Be dissolved in after the liquid, be back in the strong phosphoric acid circulation groove, in the hydration tower, do not dissolve the clean P that contains
2O
5Gas, after continuation is dissolved in one-level venturi, one-level cyclone defroster device, secondary Venturi meter, secondary cyclone defroster, is liquefied, flow into strong phosphoric acid circulation groove and dilute phosphoric acid circulation groove, solution in the dilute phosphoric acid circulation groove pumps into the strong phosphoric acid circulation groove and recycles, after repeatedly circulating, spraying, liquid is recoverable after reaching finite concentration.
Owing in the technical program, the strong phosphoric acid circulation groove is connected with an alkali lye pond, when processing low-grade mud phosphorus, alkali lye is fed the strong phosphoric acid circulation groove from the alkali lye pond, feed the hydration tower again the P in the spray hydration tower from the strong phosphoric acid circulation groove
2O
5Gas, the easier and P of alkali lye
2O
5Chemical reaction occurs form the phosphoric acid saline solution, circulation-supplied was in hydration tower, one-level venturi, one-level cyclone defroster device, secondary Venturi meter, secondary whirlwind demister, silk screen demister, tail-gas combustion stove again by system after the phosphoric acid saline solution flowed into the strong phosphoric acid groove, and P sprays, dissolves, liquefies
2O
5Gas, the solution of formation flows into strong phosphoric acid circulation groove and dilute phosphoric acid circulation groove, and the solution in the dilute phosphoric acid circulation groove recycles after pumping into the strong phosphoric acid circulation groove; When the phosphoric acid saline solution concentration that flows out behind the spray reaches finite concentration, phosphoric acid saline solution suction hold tank is prepared to carry out next step reclaim processing; Add man-hour in recovery, phosphoric acid saline solution strainer filtering impurity wherein, carry out in the potential of hydrogen and allotment to neutralization tank again, make the phosphoric acid saline solution be neutral, after this in the evaporative crystallization tank, the phosphoric acid saline solution is carried out evaporative crystallization, phosphoric acid salt is separated out from liquid, the solidliquid mixture that obtains feeds centrifugal dehumidifier, in centrifugal dehumidifier the mixed liquid of separating out is carried out centrifuge dehydration, the liquid return of deviating from enters the alkali lye pond, and solid is then sent into drying machine drying and obtained the phosphoric acid salt finished product.
Because employing alkali lye sucks the P in the combustion gas of mud phosphorus in the technical program
2O
5, the efficient of its absorption improves greatly, can be when low-grade mud phosphorus burning, and the P that content in the combustion gas is less
2O
5What absorb is cleaner, so the phosphorus content in the spray solution can reach requirement fast, and the number of times of circulated sprinkling can greatly reduce, and is conducive to save energy, improves work efficiency; Adopt follow-up recovery manufacturing procedure, make phosphate solution after the recovery in the neutralization of setting, crystallization, separation, dry manufacturing procedure, obtain high efficiency recovery processing, whole process configurations is reasonable, Btu utilization is abundant, and the waste of the energy and material is avoided in the liquids recovery utilization.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Embodiment: as shown in Figure 1, a kind of low-grade phosphorous slurry recovery system, be installed in the phosphorous slurry recovery system, the phosphorous slurry recovery system includes mud phosphorus roasting kiln 1, hydration tower 2, one-level venturi 3, one-level cyclone defroster device 4, secondary Venturi meter 5, secondary whirlwind demister 6, silk screen demister 7, tail-gas combustion stove 8, strong phosphoric acid circulation groove 18, dilute phosphoric acid circulation groove 12 and finished product phosphoric acid groove 24, hydration tower 2 is connected on mud phosphorus roasting kiln 1 rear class, behind hydration tower 2, be connected to one-level venturi 3, one-level cyclone defroster device 4, secondary Venturi meter 5, secondary whirlwind demister 6, behind secondary whirlwind demister 6, connect silk screen demister 7, tail-gas combustion stove 8 connects silk screen demister 7 rear classes, strong phosphoric acid circulation groove 18 is connected on hydration tower 2, one-level venturi 3, the outlet end of one-level cyclone defroster device 4, dilute phosphoric acid circulation groove 12 is connected on secondary Venturi meter 5, secondary whirlwind demister 6, silk screen demister 7, the outlet end of tail-gas combustion stove 8, dilute phosphoric acid circulation groove 12 has the liquid pipe to connect strong phosphoric acid circulation groove 18, strong phosphoric acid circulation groove 18 has drain pipe to be connected into product phosphoric acid groove 24, at strong phosphoric acid circulation groove 18 one group of liquid-inlet pipe 17 and drain pipe 21 are arranged, liquid-inlet pipe 17 is connected with lye vat 16, drain pipe 21 is connected with hold tank 23, the drain pipe of hold tank 23 connects strainer 22, the drain pipe of strainer 22 connects neutralization tank 20, the drain pipe of neutralization tank 20 connects evaporative crystallization tank 19, the discharge nozzle of evaporative crystallization tank 19 connects centrifugal dehumidifier 15, drain pipe 14 and discharge nozzle 13 are installed on the centrifugal dehumidifier 15, drain pipe 14 connects alkali lye pond 16, discharge nozzle 13 connects dryer 11, and finished product output tube 10 is housed on the dryer 11.
In the phosphorous slurry recovery system, the smoke discharge pipe 9 of tail-gas combustion stove 8 is connected with dryer 11.
Claims (2)
1. low-grade phosphorous slurry recovery system, be installed in the phosphorous slurry recovery system, the phosphorous slurry recovery system includes mud phosphorus roasting kiln (1), hydration tower (2), one-level venturi (3), one-level cyclone defroster device (4), secondary Venturi meter (5), secondary whirlwind demister (6), silk screen demister (7), tail-gas combustion stove (8), strong phosphoric acid circulation groove (18), dilute phosphoric acid circulation groove (12) and finished product phosphoric acid groove (24), hydration tower (2) is connected on mud phosphorus roasting kiln (1) rear class, behind hydration tower (2), be connected to one-level venturi (3), one-level cyclone defroster device (4), secondary Venturi meter (5), secondary whirlwind demister (6), behind secondary whirlwind demister (6), connect silk screen demister (7), tail-gas combustion stove (8) connects silk screen demister (7) rear class, strong phosphoric acid circulation groove (18) is connected on hydration tower (2), one-level venturi (3), the outlet end of one-level cyclone defroster device (4), dilute phosphoric acid circulation groove (12) is connected on secondary Venturi meter (5), secondary whirlwind demister (6), silk screen demister (7), the outlet end of tail-gas combustion stove (8), dilute phosphoric acid circulation groove (12) has the liquid pipe to connect strong phosphoric acid circulation groove (18), strong phosphoric acid circulation groove (18) has drain pipe to be connected into product phosphoric acid groove (24), it is characterized in that: at strong phosphoric acid circulation groove (18) one group of liquid-inlet pipe (17) and drain pipe (21) are arranged, liquid-inlet pipe (17) is connected with lye vat (16), drain pipe (21) is connected with hold tank (23), the drain pipe of hold tank (23) connects strainer (22), the drain pipe of strainer (22) connects neutralization tank (20), the drain pipe of neutralization tank (20) connects evaporative crystallization tank (19), the discharge nozzle of evaporative crystallization tank (19) connects centrifugal dehumidifier (15), upper drain pipe (14) and the discharge nozzle (13) installed of centrifugal dehumidifier (15), drain pipe (14) connects alkali lye pond (16), discharge nozzle (13) connects dryer (11), and finished product output tube (10) is housed on the dryer (11).
2. low-grade phosphorous slurry recovery according to claim 1 system, it is characterized in that: in the phosphorous slurry recovery system, the smoke discharge pipe (9) of tail-gas combustion stove (8) is connected with dryer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105826057A CN103043637A (en) | 2012-12-28 | 2012-12-28 | System for recovering low-grade phosphorus from sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105826057A CN103043637A (en) | 2012-12-28 | 2012-12-28 | System for recovering low-grade phosphorus from sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103043637A true CN103043637A (en) | 2013-04-17 |
Family
ID=48056530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105826057A Pending CN103043637A (en) | 2012-12-28 | 2012-12-28 | System for recovering low-grade phosphorus from sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103043637A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601446A (en) * | 2017-10-23 | 2018-01-19 | 湖北兴发化工集团股份有限公司 | The device and method of yellow phosphorus in continuous multi-stage evaporation recovery phosphorus mud |
| CN110615415A (en) * | 2019-09-27 | 2019-12-27 | 成都易态科技有限公司 | Sludge phosphorus treatment system and process |
| CN115121750A (en) * | 2022-06-08 | 2022-09-30 | 中机精密成形产业技术研究院（安徽）股份有限公司 | A kind of precision forming method of cylinder head forging and pretreatment equipment for forging cavity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337657A (en) * | 2008-08-06 | 2009-01-07 | 黄明科 | Process for disassembling phosphate ore by mixed acid and coproducing potassium dihydrogen phosphate, hydrogen phosphate and combined fertilizer |
| CN202099057U (en) * | 2011-06-08 | 2012-01-04 | 郭逢春 | Mud phosphorus recovery system |
| CN203006950U (en) * | 2012-12-28 | 2013-06-19 | 郭逢春 | Low-level sludge phosphorus recovery system |
-
2012
- 2012-12-28 CN CN2012105826057A patent/CN103043637A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337657A (en) * | 2008-08-06 | 2009-01-07 | 黄明科 | Process for disassembling phosphate ore by mixed acid and coproducing potassium dihydrogen phosphate, hydrogen phosphate and combined fertilizer |
| CN202099057U (en) * | 2011-06-08 | 2012-01-04 | 郭逢春 | Mud phosphorus recovery system |
| CN203006950U (en) * | 2012-12-28 | 2013-06-19 | 郭逢春 | Low-level sludge phosphorus recovery system |
Non-Patent Citations (1)
| Title |
|---|
| 梅荣武等: "磷化铝生产废气的治理", 《环境工程》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601446A (en) * | 2017-10-23 | 2018-01-19 | 湖北兴发化工集团股份有限公司 | The device and method of yellow phosphorus in continuous multi-stage evaporation recovery phosphorus mud |
| CN107601446B (en) * | 2017-10-23 | 2020-02-07 | 湖北吉星化工集团有限责任公司 | Device and method for continuously recovering yellow phosphorus in phosphorus mud through multistage evaporation |
| CN110615415A (en) * | 2019-09-27 | 2019-12-27 | 成都易态科技有限公司 | Sludge phosphorus treatment system and process |
| CN110615415B (en) * | 2019-09-27 | 2022-09-09 | 成都易态科技有限公司 | Sludge phosphorus treatment system and process |
| CN115121750A (en) * | 2022-06-08 | 2022-09-30 | 中机精密成形产业技术研究院（安徽）股份有限公司 | A kind of precision forming method of cylinder head forging and pretreatment equipment for forging cavity |
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Application publication date: 20130417 |