CN106241763A - A kind of phosphor ammonium slurry defecator and filter method thereof - Google Patents
A kind of phosphor ammonium slurry defecator and filter method thereof Download PDFInfo
- Publication number
- CN106241763A CN106241763A CN201610653162.4A CN201610653162A CN106241763A CN 106241763 A CN106241763 A CN 106241763A CN 201610653162 A CN201610653162 A CN 201610653162A CN 106241763 A CN106241763 A CN 106241763A
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- Prior art keywords
- slurry
- defecator
- filter
- filtrate
- phosphor ammonium
- Prior art date
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- Granted
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 101
- QLULGSLAHXLKSR-UHFFFAOYSA-N azane;phosphane Chemical compound N.P QLULGSLAHXLKSR-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000000706 filtrate Substances 0.000 claims abstract description 49
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 238000004140 cleaning Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000005273 aeration Methods 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 19
- 239000002893 slag Substances 0.000 claims description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000006228 supernatant Substances 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 3
- 239000012066 reaction slurry Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 9
- 239000012535 impurity Substances 0.000 abstract description 8
- 230000003204 osmotic effect Effects 0.000 abstract description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- YWEUIGNSBFLMFL-UHFFFAOYSA-N diphosphonate Chemical compound O=P(=O)OP(=O)=O YWEUIGNSBFLMFL-UHFFFAOYSA-N 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 iron ion Chemical class 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/28—Ammonium phosphates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
Abstract
The present invention relates to phosphor ammonium slurry filtration art, especially a kind of phosphor ammonium slurry defecator and filter method thereof, by the pH value to the phosphor ammonium slurry entering defecator, temperature and phosphorus ammonium proportion, solid content is bound, after guaranteeing that phosphor ammonium slurry enters in defecator, liquid can rapid osmotic enter inside filter bag, filter bag is made to support molding, in conjunction with aeration reverse osmosis filtration treatment, filtrate can be effectively made to enter inside filter bag, and then by impurities left at filter bag outer surface, and in conjunction with the process of falling bag and cleaning treatment, filter bag is regenerated, and avoid that filtrate viscosity is higher makes filtration difficulty, improve phosphorus ammonium purity in filtrate, substantially ensure that the quality of phosphorus ammonium salt product.
Description
Technical field
The present invention relates to phosphor ammonium slurry filtration art, especially a kind of phosphor ammonium slurry defecator and filtration side thereof
Method.
Background technology
During wet phosphoric acid by dihydrate standing sedimentation, substantial amounts of solid precipitation slag will be separated out, slag will be mainly composed of phosphorus
Gypsum Fibrosum and (Fe, Al)3KH14(PO4)8·4H2O complex, simultaneously possibly together with substantial amounts of soluble impurity, such as magnesium ion, calcium from
Son, iron ion, aluminium ion, sulfate radical, hexafluosilicic acid root etc.；In phosphoric acid by wet process with ammonia and in course of reaction, these impurity will
Generate the compound of Various Complex, have a strong impact on the product composition of the viscosity of phosphor ammonium slurry and phosphor ammonium slurry, physical characteristic and
The dissolubility etc. of phosphorus pentoxide.Therefore, when fine phosphorus ammonium salt product is directly produced for phosphoric acid by wet process, need phosphor ammonium slurry
Carry out filtering and impurity removing process so that the quality preparing phosphorus ammonium salt product is higher.
Traditional phosphor ammonium slurry filter method mainly has three kinds, and gravitational settling, centrifugation, filter filter；And gravity
Sedimentation needs corollary apparatus huge, and investment and operation and maintenance cost are higher, and solid tiny in full-bodied phosphor ammonium slurry is not
Molten thing is difficult to rapid subsidence, additionally, the reduction because of slurry temperature will be brilliant with phosphorus ammonium salt in solid insoluble gravity settlement process
Body separates out, and affects phosphor ammonium slurry utilization rate；Centrifugal separation equipment assembling complexity, inconvenient maintenance, investment and energy consumption are higher, and high viscous
The phosphor ammonium slurry of property easily blocks centrifugal rotatable parts；Filter plant is currently mainly filter press and band filter etc.,
Filter is intermittent operation, and frequently, filter cloth cleans inconvenience in device switching, for filtering the phosphorus ammonium material containing a certain amount of silica gel
Slurry, equipment operation rate is extremely low.
As can be seen here, phosphor ammonium slurry filter method of the prior art also exists numerous defects, all it is difficult to ensure that phosphorus ammonium
While the utilization rate of slip is higher, it is possible to improve the quality of phosphorus ammonium salt product, hinder phosphoric acid by wet process and directly prepare fine phosphorus
The development of ammonium salt product.
Summary of the invention
In order to solve above-mentioned technical problem present in prior art, the present invention provide a kind of phosphor ammonium slurry defecator and
Its filter method.
It is achieved particular by techniques below scheme:
A kind of phosphor ammonium slurry filter method, comprises the following steps:
(1) in filter pulp groove, by phosphoric acid by wet process with in ammonia and reaction slurry preparation become pH value to be 3-5, temperature is 70-90
DEG C, solid content is 1-2%, and phosphorus ammonium proportion is the phosphor ammonium slurry of 1.1-1.3；
(2) phosphor ammonium slurry is sent in defecator, by aeration reverse osmosis filtration treatment so that the filtrate of phosphor ammonium slurry is entered
Entering in the filter bag of defecator, the filtering residue of phosphor ammonium slurry is stayed the outer surface of defecator filter bag and deposits in defecator,
Treat that filter bag outer surface is blocked by slag blanket, and when filter bag internal filtrate amount is not further added by, start the process of falling bag so that filtrate enters
Filtrate receiver；After the bag that falls completes, from cleaning, liquid bath is put into cleanout fluid, rinse filter bag outer surface so that filtering residue is to sinking, and cleans
Defecator,.
Described step, is additionally included in after phosphor ammonium slurry is sent into defecator, and its filtrate penetrates into the filter of defecator
Bag is internal, and when filtering residue deposits in defecator, its lightweight filtering residue enters filter pulp groove recoil preparation phosphorus from light slag slurry recoil hole
Ammonium slip；Heavy slurry enters slurry groove from heavy slurry recoil hole, detects slurry concentration, if phosphorus pentoxide concentration is higher,
And it is unsatisfactory for environmental emission standard, then returns filter pulp groove preparation phosphor ammonium slurry；If phosphorus pentoxide concentration is relatively low, and meets
Environmental emission standard, then discharge.
Described step, is additionally included in after phosphor ammonium slurry is sent into defecator, and filtrate penetrates into the filter bag of defecator
In, the supernatant of filtrate constantly increases to the porous tube plate of defecator, and in the process, the one-tenth that in filtrate, concentration is relatively low
Divide to sinking so that supernatant concentration is relatively low, and the supernatant low for this concentration is entered filter pulp groove by filtrate refluxing opening
Prepare phosphor ammonium slurry and/or clean liquid bath by going cleanout fluid notch to enter.
Described step, is sending in defecator by phosphor ammonium slurry, and the compression using pressure to be 0.15-0.35MPa is empty
Gas is passed through bottom defecator and carries out Air Exposure, and the Air Exposure time is 1-2h.
Described step, after bag completes, it is put in cleanout fluid cleaning process from cleaning liquid bath, is used pressure
Power is that the compressed air of 0.15-0.25MPa carries out Air Exposure, and aeration time is until filter bag outer surface slag blanket washes.
Described step, is putting in cleanout fluid cleaning process from cleaning liquid bath, is that cleanout fluid is first put into immersion 25-
After 30min, then the compressed air being used pressure to be 0.15-0.25MPa carries out Air Exposure.
Described defecator, including cylinder, porous tube plate, filter bag, removes filtrate notch, phosphor ammonium slurry entrance, solarization air cap,
Wherein, the hole that inner barrel is provided with on porous tube plate, porous tube plate connects with the bag mouth of filter bag, at cylinder near the side at top
It is provided with filtrate notch on wall, on the sidewall of bottom, is respectively arranged with phosphor ammonium slurry entrance and solarization air cap at cylinder；
Described device, also includes being arranged on cylinder filtrate refluxing opening on the sidewall at top and removing cleanout fluid notch
With cylinder filter washing water inlet on the sidewall of bottom is set；
Described device, also includes the heavy slurry recoil hole being arranged on cylinder body bottom and is arranged on cylinder near bottom
Light slag slurry recoil hole on sidewall.
Described defecator, the longitudinal center line of solarization air cap is positioned at the bottom of filter bag.
Described defecator, also includes the support bar for supporting this device；Described support bar is at least 2.
Described device, filter bag is polymeric membrane for separation, is provided with support member so that filter bag can support and consolidate into
Type, and this support member can freely skid off.
Compared with prior art, the technique effect of the present invention is embodied in:
By the entrance pH value of phosphor ammonium slurry of defecator, temperature and phosphorus ammonium proportion, solid content are bound, really
After protecting in phosphor ammonium slurry entrance defecator, liquid can rapid osmotic enter inside filter bag so that filter bag supports molding, in conjunction with
Aeration reverse osmosis filtration treatment, it is possible to effectively make filtrate enter inside filter bag, and then by impurities left at filter bag outer surface, and
And combining the process of falling bag and cleaning treatment so that filter bag regenerates, and avoids the higher filtration difficulty that makes of filtrate viscosity, improves
Phosphorus ammonium purity in filtrate, has substantially ensured that the quality of phosphorus ammonium salt product.
The invention is the most prominent, and phosphor ammonium slurry filtration cost is relatively low, and energy consumption is low, and equipment is simple, equipment cost
Low, filter bag is easy to clean.
Accompanying drawing explanation
Fig. 1 is the phosphor ammonium slurry filtering technique schematic flow sheet of the present invention.
A-filtrate receiver B-cleans liquid bath C-compressed gas D-defecator E-filter pulp groove F-slurry groove.
Fig. 2 is filter apparatus configuration schematic diagram.
1-filtrate refluxing opening 2-goes filtrate notch 3-to go cleanout fluid notch 4-porous tube plate 5-filter bag 6-cleanout fluid to enter
9-heavy slurry recoil hole, mouth 7-solarization air cap 8-light slag slurry recoil hole 10-support bar 11-phosphor ammonium slurry entrance 12-cylinder
Body.
Detailed description of the invention
With specific embodiment, technical scheme is further limited below in conjunction with the accompanying drawings, but requirement
The scope of protection is not only limited to description.
Embodiment
Concrete principle and the concrete operations mode of the present invention are carried out in such a way, and those skilled in the art are permissible
According to herein below, the overall plan of the invention is understood:
A kind of phosphor ammonium slurry filter method, comprises the following steps:
(1) in filter pulp groove E, by phosphoric acid by wet process with in ammonia and reaction slurry preparation become pH value to be 3-5, temperature is 70-
90 DEG C, solid content is 1-2%, and phosphorus ammonium proportion is the phosphor ammonium slurry of 1.1-1.3；
(2) phosphor ammonium slurry is sent in defecator D, by aeration reverse osmosis filtration treatment so that the filtrate of phosphor ammonium slurry
Entering in the filter bag 5 of defecator D, the filtering residue of phosphor ammonium slurry stays the outer surface of defecator D filter bag 5 and at defecator D
Middle deposition, treats that filter bag 5 outer surface is blocked by slag blanket, and when filter bag 5 internal filtrate amount is not further added by, starts the process of falling bag, make
Obtain filtrate and enter filtrate receiver A；After the bag that falls completes, from cleaning, liquid bath B puts into cleanout fluid, rinse filter bag outer surface so that filtering residue
To sinking, and cleaning and filtrating equipment D,.Improve filtrate purity, it is ensured that the quality of phosphorus ammonium salt product, and achieve
Filtrate sedimentation is the denseest.By aeration reverse osmosis filtration treatment so that slag blanket remains in defecator, or by defecator
Defecator is got rid of in light slag slurry recoil hole or heavy slurry recoil hole so that phosphor ammonium slurry filtrate obtains purification, junction
Reason process Air Exposure so that filtering residue sticks to the speed of filter bag outer surface and slows down, and guarantee to stick to filter bag outer surface
Slag blanket is loose porous cellular, it is to avoid filter bag regeneration difficulty, reduces filter bag cleaning of outer surface difficulty, it is achieved that filter dress
That puts repeats regeneration application, reduces cost.
In certain embodiments, above-mentioned step, it is additionally included in after phosphor ammonium slurry is sent into defecator D, its filtrate is oozed
Filter bag 5 to defecator D is internal thoroughly, and when filtering residue deposits in defecator D, its lightweight filtering residue is from light slag slurry recoil hole 8
Enter filter pulp groove E recoil preparation phosphor ammonium slurry；Heavy slurry enters slurry groove F from heavy slurry recoil hole 9, and detection slurry is dense
Degree, if phosphorus pentoxide concentration is higher, and is unsatisfactory for environmental emission standard, then return filter pulp groove E and prepare phosphor ammonium slurry；If five
Aoxidize two phosphorus concentrations relatively low, and meet environmental emission standard, then discharge.
In certain embodiments, above-mentioned step, it is additionally included in after phosphor ammonium slurry is sent into defecator D, filtrate is permeated
In the filter bag 5 of defecator D, the supernatant of filtrate constantly increases to the porous tube plate 4 of defecator D, and in this process
In, the composition that in filtrate, concentration is relatively low is to sinking so that supernatant concentration is relatively low, and the supernatant low for this concentration is passed through
Filtrate refluxing opening 1 enters filter pulp groove E preparation phosphor ammonium slurry and/or cleans liquid bath B by going cleanout fluid notch 3 to enter.
In certain embodiments, above-mentioned step, phosphor ammonium slurry to be sent in defecator D, employing pressure is
The compressed air of 0.15MPa or 0.25MPa or 0.35MPa or 0.2MPa is passed through bottom defecator and carries out Air Exposure, aeration
The process time is 1h or 2h or 1.5h or 1.1h.Reduce defecator load, reduce cost and energy consumption.
In certain embodiments, above-mentioned step, after bag completes, it is put into cleanout fluid from cleaning liquid bath B and cleans
During, the compressed air being used pressure to be 0.15MPa or 0.25MPa or 0.2MPa carries out Air Exposure, aeration time
Until filter bag outer surface slag blanket washes.
In certain embodiments, above-mentioned step, putting in cleanout fluid cleaning process from cleaning liquid bath, be first will be clear
After washing liquid puts into immersion 25min or 30min or 28min, then to be used pressure be 0.15MPa's or 0.25MPa or 0.2MPa
Compressed air carries out Air Exposure.
In certain embodiments, above-mentioned defecator, including cylinder 12, porous tube plate 4, filter bag 5, go filtrate notch 2,
Phosphor ammonium slurry entrance 11, solarization air cap 7, wherein, the hole that cylinder 12 is internally provided with on porous tube plate 4, porous tube plate 4 and filter bag 5
Bag mouth connection, on the sidewall at top, be provided with filtrate notch 2 at cylinder 12, at cylinder 12 on the sidewall of bottom point
It is not provided with phosphor ammonium slurry entrance 11 and solarization air cap 7；
Described device, also includes being arranged on the cylinder 12 filtrate refluxing opening 1 on the sidewall at top and removing cleanout fluid
The notch 3 and cylinder 12 filter washing water inlet 6 on the sidewall of bottom is set；
Described device, also includes being arranged on the recoil of the heavy slurry bottom cylinder 12 hole 9 and to be arranged on cylinder 12 close
Light slag slurry recoil hole 8 on the sidewall of bottom.
In certain embodiments, above-mentioned defecator, the longitudinal center line of solarization air cap 7 is positioned at the bottom of filter bag 5.
In certain embodiments, above-mentioned defecator, also include the support bar 10 for supporting this device；Described props up
Strut is 2,3.
In certain embodiments, above-mentioned device, filter bag 5 is polymeric membrane for separation, is provided with support member so that filter
Bag 5 can support firm molding, and this support member can freely skid off.
In the invention, make use of circular treatment so that the phosphorus ammonium composition in heavy slurry, light slag slurry obtains fully
Absorption and utilization, improve the utilization rate of phosphor ammonium slurry, improve the concentration of phosphorus ammonium composition in filtrate, reduce phosphorus ammonium salt produce
Impurity content in product, reduces phosphor ammonium slurry remove impurity difficulty, reduces phosphor ammonium slurry remove impurity cost.Processing step is simple, easily
In industrialized production.
Claims (10)
1. a phosphor ammonium slurry filter method, it is characterised in that comprise the following steps:
(1) in filter pulp groove, by phosphoric acid by wet process with in ammonia and reaction slurry preparation become pH value to be 3-5, temperature is 70-90 DEG C,
Solid content is 1-2%, and phosphorus ammonium proportion is the phosphor ammonium slurry of 1.1-1.3；
(2) phosphor ammonium slurry is sent in defecator, by aeration reverse osmosis filtration treatment so that the filtrate of phosphor ammonium slurry entered
In the filter bag of filter device, the filtering residue of phosphor ammonium slurry is stayed the outer surface of defecator filter bag and deposits in defecator, to be filtered
Bag outer surface is blocked by slag blanket, and when filter bag internal filtrate amount is not further added by, starts the process of falling bag so that filtrate enters filtrate
Groove；After the bag that falls completes, from cleaning, liquid bath is put into cleanout fluid, rinse filter bag outer surface so that filtering residue is to sinking, and cleans filtration
Device,.
2. phosphor ammonium slurry filter method as claimed in claim 1, it is characterised in that described step, is additionally included in phosphorus ammonium
After slip sends into defecator, its filtrate penetrates into inside the filter bag of defecator, and when filtering residue deposits in defecator, it is light
Matter filtering residue enters filter pulp groove recoil preparation phosphor ammonium slurry from light slag slurry recoil hole；Heavy slurry enters from heavy slurry recoil hole
Slurry groove, detects slurry concentration, if phosphorus pentoxide concentration is higher, and is unsatisfactory for environmental emission standard, then return filter pulp groove
Preparation phosphor ammonium slurry；If phosphorus pentoxide concentration is relatively low, and meets environmental emission standard, then discharge.
3. phosphor ammonium slurry filter method as claimed in claim 1, it is characterised in that described step, is additionally included in phosphorus ammonium
After slip sends into defecator, filtrate penetrates in the filter bag of defecator, and the supernatant of filtrate is constantly to defecator
Porous tube plate increases, and in the process, the composition that in filtrate, concentration is relatively low is to sinking so that supernatant concentration is relatively low, and
The supernatant low for this concentration is entered filter pulp groove preparation phosphor ammonium slurry and/or by removing cleanout fluid notch by filtrate refluxing opening
Enter and clean liquid bath.
4. phosphor ammonium slurry filter method as claimed in claim 1, it is characterised in that described step, is sending phosphor ammonium slurry
Entering in defecator, the compressed air using pressure to be 0.15-0.35MPa is passed through bottom defecator and carries out Air Exposure, exposes
The gas disposal time is 1-2h.
5. phosphor ammonium slurry filter method as claimed in claim 1, it is characterised in that described step, after bag completes, its
Putting in cleanout fluid cleaning process from cleaning liquid bath, the compressed air being used pressure to be 0.15-0.25MPa carries out aeration
Processing, aeration time is until filter bag outer surface slag blanket washes.
6. phosphor ammonium slurry filter method as claimed in claim 5, it is characterised in that described step, from cleaning in liquid bath
Put in cleanout fluid cleaning process, be first cleanout fluid is put into immersion 25-30min after, then to be used pressure be 0.15-
The compressed air of 0.25MPa carries out Air Exposure.
7. the phosphor ammonium slurry filter method as described in any one of claim 1-6, it is characterised in that described defecator, bag
Include cylinder (12), porous tube plate (4), filter bag (5), remove filtrate notch (2), phosphor ammonium slurry entrance (11), solarization air cap (7), wherein,
The hole that cylinder (12) is internally provided with on porous tube plate (4), porous tube plate (4) connects with the bag mouth of filter bag (5), in cylinder (12)
On the sidewall at top, it is provided with filtrate notch (2), on the sidewall of bottom, is respectively arranged with phosphorus ammonium material at cylinder (12)
Slurry entrance (11) and solarization air cap (7)；
Described device, also includes being arranged on the cylinder (12) filtrate refluxing opening (1) on the sidewall at top and removing cleanout fluid
Notch (3) and the filter washing water inlet (6) arranged on the sidewall of the close bottom of cylinder (12)；
Described device, also includes being arranged on heavy slurry recoil hole (9) of cylinder (12) bottom and being arranged on cylinder (12) leaning on
Light slag slurry recoil hole (8) on the sidewall of nearly bottom.
8. phosphor ammonium slurry filter method as claimed in claim 7, it is characterised in that described defecator, solarization air cap (7)
Longitudinal center line is positioned at the bottom of filter bag (5).
9. phosphor ammonium slurry filter method as claimed in claim 7, it is characterised in that described defecator, also include for
Support the support bar (10) of this device；Described support bar is at least 2.
10. phosphor ammonium slurry filter method as claimed in claim 7, it is characterised in that described device, filter bag (5) is high score
Son separates film, is provided with support member so that filter bag (5) can support firm molding, and this support member can free skating
Go out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610653162.4A CN106241763B (en) | 2016-08-11 | 2016-08-11 | A kind of phosphor ammonium slurry filter device and its filter method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610653162.4A CN106241763B (en) | 2016-08-11 | 2016-08-11 | A kind of phosphor ammonium slurry filter device and its filter method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106241763A true CN106241763A (en) | 2016-12-21 |
| CN106241763B CN106241763B (en) | 2018-09-25 |
Family
ID=58079192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610653162.4A Active CN106241763B (en) | 2016-08-11 | 2016-08-11 | A kind of phosphor ammonium slurry filter device and its filter method |
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| Country | Link |
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| CN (1) | CN106241763B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915639A (en) * | 2021-01-28 | 2021-06-08 | 云南中正化学工业有限公司 | Slurry filter-pressing separation device for solid fertilizer production |
Citations (5)
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| CN102602904A (en) * | 2012-04-16 | 2012-07-25 | 瓮福（集团）有限责任公司 | Method for producing monoammonium phosphate from raffinate acid |
| CN202657964U (en) * | 2012-06-05 | 2013-01-09 | 瓮福（集团）有限责任公司 | Device for producing industrial monoammonium phosphate with raffinate |
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| CN112915639A (en) * | 2021-01-28 | 2021-06-08 | 云南中正化学工业有限公司 | Slurry filter-pressing separation device for solid fertilizer production |
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| CN106241763B (en) | 2018-09-25 |
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