CN106139681B - A kind of cleaning method of phosphor ammonium slurry filter device and the device - Google Patents
A kind of cleaning method of phosphor ammonium slurry filter device and the device Download PDFInfo
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- CN106139681B CN106139681B CN201610653161.XA CN201610653161A CN106139681B CN 106139681 B CN106139681 B CN 106139681B CN 201610653161 A CN201610653161 A CN 201610653161A CN 106139681 B CN106139681 B CN 106139681B
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- phosphor ammonium
- ammonium slurry
- slurry
- filter bag
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- 239000002002 slurry Substances 0.000 title claims abstract description 100
- QLULGSLAHXLKSR-UHFFFAOYSA-N azane;phosphane Chemical compound N.P QLULGSLAHXLKSR-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 238000004140 cleaning Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 42
- 239000000706 filtrate Substances 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 239000002893 slag Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000005273 aeration Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000012065 filter cake Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004074 SiF6 Inorganic materials 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- -1 tripolyphosphate ammonium salt Chemical class 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Filtration Of Liquid (AREA)
- Filtering Materials (AREA)
Abstract
The present invention relates to phosphor ammonium slurry filtration arts, the cleaning method of especially a kind of phosphor ammonium slurry filter device and the device, pass through filter device, including cylinder, porous tube plate, filter bag, remove filtrate notch, phosphor ammonium slurry entrance, solarization air cap, wherein, inner barrel is provided with porous tube plate, hole on porous tube plate is connected to the sack of filter bag, filtrate notch is provided on side wall of the cylinder close to top, phosphor ammonium slurry entrance and solarization air cap are respectively arranged in bottom sidewall in cylinder, so that the filtration yield to phosphor ammonium slurry is larger, filter effect is higher, low energy consumption, operation and maintenance cost are lower, pass through aeration and sodium hydroxide solution cleaning, so that the slag blanket for being attached to filter bag outer surface is loose, cleaning difficulty is easier to, cleaning frequency shortens, service life of equipment extends.
Description
Technical field
The present invention relates to phosphor ammonium slurry filtration art, especially a kind of phosphor ammonium slurry filter device and the device
Cleaning method.
Background technique
A large amount of solid precipitating sludges will be precipitated during wet phosphoric acid by dihydrate standing sedimentation, most of solid phases are in sludge
Ardealite and (Fe, Al)3KH14(PO4)8·4H2O complex compound, in addition, containing great amount of soluble impurity, such as Mg in phosphoric acid by wet process2+、
Ca2+、Fe3+、Al3+、SO4 2-And SiF6 2-Deng in phosphoric acid by wet process and during ammonia neutralization reaction, these impurity will generate a variety of multiple
Heterocompound, and will seriously affect phosphoric acid and ammonium phosphate product composition, physical property and P2O5Dissolubility etc..Using phosphoric acid by wet process
Removal of impurities need to be filtered to phosphor ammonium slurry by directly producing fine phosphorus ammonium salt product, otherwise the inferior quality of product.
There are mainly three types of phosphor ammonium slurry industrial separation equipments, i.e. gravitational settler, centrifugal separator and filter.Gravity is heavy
It is huge that device system and device drops, and investment and operation and maintenance cost are higher, and solid insoluble tiny in full-bodied phosphor ammonium slurry
It is not easy rapid subsidence, in addition, solid insoluble is in gravity settlement process easily due to the reduction of slurry temperature with phosphorus ammonium salt
Crystal is precipitated, and influences phosphor ammonium slurry utilization rate.Centrifugal separator assembly is complicated, and inconvenient maintenance, investment and energy consumption are higher, and high viscous
Property phosphor ammonium slurry easily block centrifugation rotatable parts.Filter is currently mainly plate and frame filter press and band filter etc., mistake
Filter is intermittent operation, and frequently, filter cloth cleaning is inconvenient for device switching, and the phosphorus ammonium material of a certain amount of silica gel is contained for filtering
Slurry, equipment operation rate are extremely low.
In consideration of it, this researcher is in view of the above technical defects, phosphor ammonium slurry filter plant is improved, provides one
The novel phosphor ammonium slurry filter device of kind.But the device is to be configured based on phosphor ammonium slurry itself with characteristic, to reach
Overcome the defect of existing filter device；But existing filtering equipment, after being separated by filtration processing, cleaning way is more simple
It is single, and be rinsed using clear water mostly, and in the device, the filter bag of the filter element used be attached with it is a large amount of
Slag blanket, be difficult to restore the filter capacity of filter device using clear water cleaning so that the reduced service life of filter device, filtering
It measures lower.
Summary of the invention
In order to solve the above technical problems existing in the prior art, the present invention provide a kind of phosphor ammonium slurry filter device with
And the cleaning method of the device.
It is achieved particular by following technical scheme:
PH value is 3-5 by a kind of phosphor ammonium slurry filter device cleaning method, and temperature is 70-90 DEG C, solid content 1-2%, phosphorus
The phosphor ammonium slurry of ammonium specific gravity 1-1.3 is at least 25-35m according to filter capacity3/ h processing, after device continuous operation 20-25h,
Used temperature for 60-80 DEG C again, the sodium hydroxide solution that mass concentration is 10-20% impregnates filter bag 20-35min.
The immersion, in soaking process, using Air Exposure.The Air Exposure is with pressure for 0.15-0.35MPa
Compressed air be passed through.
A kind of phosphor ammonium slurry filter device, including cylinder, porous tube plate, filter bag, go filtrate notch, phosphor ammonium slurry entrance,
Solarization air cap, wherein inner barrel is provided with porous tube plate, the hole on porous tube plate is connected to the sack of filter bag, close in cylinder
It is provided with filtrate notch on the side wall at top, is respectively arranged with phosphor ammonium slurry entrance and aeration in bottom sidewall in cylinder
Hole.
The longitudinal center line of the solarization air cap is located at the bottom of filter bag.
The device further includes that filtrate refluxing opening of the cylinder on the side wall at top is arranged in and removes cleaning solution notch
With filter washing water inlet of the setting cylinder on the side wall of bottom；
The device further includes that the heavy slurry recoil hole of cylinder body bottom is arranged in and cylinder is arranged in close to bottom
Light slag slurry recoil hole on side wall.
Described goes cleaning solution notch to be located at the lower section for removing filtrate notch.
It is provided with supporting element in the filter bag, enables filter bag to support firm molding, and the supporting element can be certainly
By skidding off；The filter bag is using polymeric membrane for separation；The cylinder serves as a contrast the double-deck offset plate material using carbon steel.
The device further includes the support rod for being used to support the device；The support rod is at least 2.
A kind of cleaning method of above-mentioned phosphor ammonium slurry filter device, enters filtering by phosphor ammonium slurry entrance for phosphor ammonium slurry
Device, and under the action of solarization air cap, so that phosphor ammonium slurry filtrate enters inside filter bag, phosphor ammonium slurry filter residue stays in filter bag appearance
Face is flowed out by light slag slurry recoil hole and heavy slurry recoil hole, after return is mixed with phosphor ammonium slurry, into filtering dress
It sets, so that phosphor ammonium slurry filter device realizes continuous filtration treatment；Filtrate inside filter bag is constantly accumulated, and in filter bag appearance
Under the aeration effect in face, constantly to going to filtrate notch end to increase, until completing phosphorus ammonium from going filtrate notch to flow into filtrate notch
The filtering of slurry；Meanwhile constantly adhering to filter residue on the surface of filter bag, adhere to filter residue, so that the ability of filter device is lower than
25-35m3When/h, the filtering of arresting stop is run, and pours out the filtrate in filter bag, and be put into cleaning solution from filter washing water inlet, is impregnated
20-35min, and be passed through Air Exposure with pressure for the compressed air of 0.15-0.35MPa infiltrates through the cleaning solution of filter bag from going
Cleaning solution notch enters in cleaning liquid bath, detects for cleaning next time, then with phosphor ammonium slurry to be filtered, filter capacity is at least
For 25-35m3When/h, cleaning is completed, and the pH value of phosphor ammonium slurry to be filtered is 3-5, and temperature is 70-90 DEG C, solid content 1-2%, phosphorus
Ammonium specific gravity 1-1.3；Booting operation filtering, until the time reaches 20-25h, then is shut down, repeats above-mentioned cleaning method, i.e.,
The cleaning of achievable phosphor ammonium slurry filter device in the process of running.
Compared with prior art, technical effect of the invention is embodied in:
By filter device, including cylinder, porous tube plate, filter bag, filtrate notch, phosphor ammonium slurry entrance, solarization air cap are removed,
In, inner barrel is provided with porous tube plate, the hole on porous tube plate is connected to the sack of filter bag, in cylinder close to the side wall at top
On be provided with filtrate notch, phosphor ammonium slurry entrance and solarization air cap are respectively arranged in bottom sidewall in cylinder, so that right
The filtration yield of phosphor ammonium slurry is larger, and filter effect is higher, and low energy consumption, and operation and maintenance cost are lower, passes through aeration and hydrogen-oxygen
Change sodium solution cleaning, so that the slag blanket for being attached to filter bag outer surface is loose, cleaning difficulty is easier to, and the cleaning frequency shortens, equipment
Service life extends.
And in order to shorten the cleaning frequency to above-mentioned filter device, the cost of cleaning is reduced, this researcher passes through to clear
Washing method is studied, and in conjunction with the temperature, concentration and cleaning way of cleaning solution, makes it possible to restore filtering within 40min
The filter capacity of device extends the service life of filter device, shortens filter device downtime, improves the unit time
To the filtration yield of phosphor ammonium slurry, energy consumption is lower, and cost is relatively low.
Silica gel is set to be converted into readily soluble silicon so that chemical action occurs as cleaning solution processing by sodium hydroxide solution
Sour sodium, metal tripolyphosphate ammonium salt complex compound decomposed releases ammonia, while part metals are converted into certain deliquescent M
(OH)X, so that the filter cake layer for being adhered to filter membrane surface and the interpore firm compact of filter membrane is become loose porous honeycomb, improve
To the cleaning effect of filter device.
After the researcher of the invention is by substituting sodium hydroxide using sulfuric acid, the clear water of room temperature, according to the present invention
Processing mode start the cleaning processing, the results show that sulfuric acid cleaned processing need for 24 hours more than, filter device can be made
Filter capacity is restored to 23m3/ h or so, is cleaned using clear water, needs constantly to be rinsed, and the flushing pressure of clear water needs
Under 6-9MPa, the filter capacity of filter device can be made to restore to 18m3/ h or so；And also sulfuric acid temperature is adjusted to
80-90 DEG C, after mass concentration is defined as 5-8%, then cleaning and filtrating equipment is carried out, needs can at least to filter for 24 hours
The filter capacity of device is restored to 25m3/ h or more, and this researcher is started the cleaning processing using sodium hydroxide solution,
The filter capacity that filter device is allowed within 40min restores 25m3/ h or more, in particular by sodium hydroxide solution with
60-80 DEG C, mass concentration starts the cleaning processing for 10-20%, enables to the filtering energy for restoring filter device within 30min
Power, and the Air Exposure of aerating system is combined, it can effectively avoid filter cake layer density higher, improve the loose of filter cake layer
Degree reduces cleaning difficulty.
The researcher of the invention to sodium hydroxide solution as cleaning solution cleaning treatment when, to the dense of sodium hydroxide
Degree, temperature is studied, and is obtained, in one timing of temperature, concentration is 21% or so, and effect is compared with 20%, filtering
Ability is declined, and the service life of device decreases；When concentration is 9%, filter capacity recovery time needs
At least 35min, so that the cleaning frequency is longer；Certain in concentration, when temperature is 85 DEG C, cleaning effect is undesirable, and equipment makes
With the lost of life, when temperature is 55 DEG C, filter capacity recovery time reaches 40min or so, and the cleaning frequency is longer, cost compared with
It is high.And in above-mentioned treatment process, when without Air Exposure, cleaning effect is unsatisfactory, the time cleaned every time
There will be biggish deviation, cause to be difficult to control filter device scavenging period, for this purpose, by the way that Air Exposure is added, so that filter
It after slag blanket is loose, is cleaned using sodium hydroxide solution, each scavenging period is in 30min or so, so that filter device
Filter capacity has been restored to 25m3/ h or more, it is seen then that Air Exposure reduces the damage to filter device, extends filter device
Service life.
Detailed description of the invention
Fig. 1 is phosphor ammonium slurry filter apparatus configuration schematic diagram.
1- filtrate refluxing opening 2- goes filtrate notch 3- that cleaning solution notch 4- porous tube plate 5- filter bag 6- cleaning solution is gone to enter
Mouth 7- solarization air cap 8- light slag slurry recoil hole 9- heavy slurry recoils hole 10- support rod 11- phosphor ammonium slurry entrance 12-
Body.
Specific embodiment
It is limited with specific embodiment technical solution of the present invention is further, but is required with reference to the accompanying drawing
The range of protection is not only limited to made description.
Embodiment one
PH value is 3 by a kind of phosphor ammonium slurry filter device cleaning method, and temperature is 70 DEG C, solid content 1%, phosphorus ammonium specific gravity 1
Phosphor ammonium slurry be at least 25m according to filter capacity3/ h processing, after device continuous operation 20h, then is used temperature for 60
DEG C, the sodium hydroxide solution that mass concentration is 10% impregnates filter bag 20min.The immersion, in soaking process,
Using Air Exposure.The Air Exposure is to be passed through with pressure for the compressed air of 0.15MPa.
Embodiment two
PH value is 5 by a kind of phosphor ammonium slurry filter device cleaning method, and temperature is 90 DEG C, solid content 2%, phosphorus ammonium specific gravity
1.3 phosphor ammonium slurry is at least 35m according to filter capacity3/ h processing, after device continuous operation 25h, then is used temperature
It is 80 DEG C, the sodium hydroxide solution that mass concentration is 20% impregnates filter bag 35min.The immersion, in soaking process
In, using Air Exposure.The Air Exposure is to be passed through with pressure for the compressed air of 0.35MPa.
Embodiment three
PH value is 4 by a kind of phosphor ammonium slurry filter device cleaning method, and temperature is 80 DEG C, solid content 1.5%, phosphorus ammonium ratio
The phosphor ammonium slurry for weighing 1.2 is at least 30m according to filter capacity3/ h processing, after device continuous operation 23h, then is used temperature
Degree is 70 DEG C, and the sodium hydroxide solution that mass concentration is 15% impregnates filter bag 27min.The immersion was being impregnated
Cheng Zhong, using Air Exposure.The Air Exposure is to be passed through with pressure for the compressed air of 0.2MPa.
Example IV
A kind of phosphor ammonium slurry filter device, including cylinder 12, porous tube plate 4, filter bag 5, remove filtrate notch 2, phosphor ammonium slurry
Entrance 11, solarization air cap 7, wherein the sack that cylinder 12 is internally provided with porous tube plate 4, the hole on porous tube plate 4 and filter bag 5 connects
It is logical, it is provided with filtrate notch 2 on side wall of the cylinder 12 close to top, is respectively arranged in bottom sidewall in cylinder 12
Phosphor ammonium slurry entrance 11 and solarization air cap 7.
Embodiment five
On the basis of example IV, the longitudinal center line of other same example IVs, the solarization air cap 7 is located at filter bag
5 bottom.
Embodiment six
On the basis of example IV, other same example IVs, the device further includes that setting is close in cylinder 12
It filtrate refluxing opening 1 on the side wall at top and removes cleaning solution notch 3 and cleaning solution of the cylinder 12 on the side wall of bottom is set
Entrance 6；
The device further includes that the heavy slurry recoil hole 9 of 12 bottom of cylinder is arranged in and is arranged close in cylinder 12
Light slag slurry recoil hole 8 on the side wall of bottom.
Embodiment seven
On the basis of example IV, other same example IVs are described to go cleaning solution notch 3 to be located to remove filtrate notch
2 lower section.
Embodiment eight
On the basis of example IV, other same example IVs are provided with supporting element in the filter bag 5, so that filter
Bag 5 can support firm molding, and the supporting element can be skidded off freely；The filter bag 5 is using polymeric membrane for separation；
The cylinder 12 serves as a contrast the double-deck offset plate material using carbon steel.
Embodiment nine
On the basis of example IV, other same example IVs, the device further includes being used to support the device
Support rod 10；The support rod is at least 2.
Embodiment ten
On the basis of the above embodiments, it is being carried out at phosphor ammonium slurry filtering specific to above-mentioned phosphor ammonium slurry filter device
The cleaning method of filter type and phosphor ammonium slurry filter device during reason are as follows: by phosphor ammonium slurry by phosphor ammonium slurry entrance 11 into
Enter filter device, and under the action of solarization air cap 7, so that phosphor ammonium slurry filtrate enters inside filter bag 5, phosphor ammonium slurry filter residue is stayed in
Filter bag outer surface is flowed out by light slag slurry recoil hole 8 and heavy slurry recoil hole 9, after return is mixed with phosphor ammonium slurry,
Into filter device, so that phosphor ammonium slurry filter device realizes continuous filtration treatment；Filtrate inside filter bag 5 is constantly accumulated,
And under the aeration effect of 7 outer surface of filter bag, constantly to going to 2 end of filtrate notch to increase, until from going filtrate notch 2 to flow into filter
Liquid bath mouth completes the filtering of phosphor ammonium slurry；Meanwhile constantly adhering to filter residue on the surface of filter bag 5, adhere to filter residue, so that mistake
The ability for filtering device is lower than 25-35m3When/h, the filtering of arresting stop is run, and pours out the filtrate in filter bag 5, and enter from cleaning solution
Mouth 6 is put into cleaning solution, impregnates 20-35min, and the compressed air with pressure for 0.15-0.35MPa is passed through Air Exposure, infiltration
Enter the cleaning solution of filter bag 5 from going cleaning solution notch 3 to enter in cleaning liquid bath, for cleaning next time, then with phosphorus ammonium material to be filtered
Slurry detection, filter capacity are at least 25-35m3When/h, cleaning is completed, and the pH value of phosphor ammonium slurry to be filtered is 3-5, and temperature is
70-90 DEG C, solid content 1-2%, phosphorus ammonium specific gravity 1-1.3；Booting operation filtering, until the time reaches 20-25h, then is shut down,
Above-mentioned cleaning method is repeated, the cleaning of phosphor ammonium slurry filter device in the process of running can be completed.Cleaning solution is that temperature is
60-80 DEG C, mass concentration is the sodium hydroxide solution of 10-20%.
Claims (7)
1. a kind of phosphor ammonium slurry filter device cleaning method, which is characterized in that by pH value be 3-5, temperature is 70-90 DEG C, containing solid
1-2% is measured, the phosphor ammonium slurry of phosphorus ammonium specific gravity 1-1.3 is at least 25-35m according to filter capacity3/ h processing, to device continuous operation
After 20-25h, then used temperature for 60-80 DEG C, the sodium hydroxide solution that mass concentration is 10-20% impregnates filter bag 20-
35min；
The phosphor ammonium slurry filter device, including cylinder (12), porous tube plate (4), filter bag (5), remove filtrate notch (2), phosphorus
Ammonium slurry inlet (11), solarization air cap (7), wherein cylinder (12) is internally provided with porous tube plate (4), the hole on porous tube plate (4)
It is connected to the sack of filter bag (5), filtrate notch (2) is provided on the side wall of cylinder (12) close to top, in cylinder (12)
Phosphor ammonium slurry entrance (11) and solarization air cap (7) are respectively arranged in bottom sidewall；
The phosphor ammonium slurry filter device further includes filtrate refluxing opening of the setting on the side wall at cylinder (12) close top
(1) it and removes cleaning solution notch (3) and the filter washing water inlet (6) of cylinder (12) on the side wall of bottom is set；
The device further includes that heavy slurry recoil hole (9) and setting of the setting in cylinder (12) bottom are leaned in cylinder (12)
Light slag slurry on the side wall of nearly bottom recoils hole (8)；
The phosphor ammonium slurry filter device, which is characterized in that the device further includes the support rod for being used to support the device
(10)；The support rod is at least 2.
2. phosphor ammonium slurry filter device cleaning method as described in claim 1, which is characterized in that the immersion is being soaked
During bubble, using Air Exposure.
3. phosphor ammonium slurry filter device cleaning method as claimed in claim 2, which is characterized in that the Air Exposure is
It is passed through with pressure for the compressed air of 0.15-0.35MPa.
4. phosphor ammonium slurry filter device cleaning method as described in claim 1, which is characterized in that the solarization air cap (7)
Longitudinal center line is located at the bottom of filter bag (5).
5. phosphor ammonium slurry filter device cleaning method as described in claim 1, which is characterized in that described removes cleaning solution notch
(3) it is located at the lower section for going to filtrate notch (2).
6. phosphor ammonium slurry filter device cleaning method as described in claim 1, which is characterized in that set in the filter bag (5)
It is equipped with supporting element, so that filter bag (5) can support firm molding, and the supporting element can be skidded off freely；The filter bag (5)
Using polymeric membrane for separation；
The cylinder (12) serves as a contrast the double-deck offset plate material using carbon steel.
7. phosphor ammonium slurry filter device cleaning method as described in claim 1, which is characterized in that by phosphor ammonium slurry by phosphorus ammonium material
It starches entrance (11) and enters filter device, and under the action of solarization air cap (7), so that phosphor ammonium slurry filtrate enters filter bag (5) inside,
Phosphor ammonium slurry filter residue stays in filter bag outer surface or by light slag slurry recoil hole (8) and heavy slurry recoil hole (9) outflow, returns
It returns after being mixed with phosphor ammonium slurry, into filter device, so that phosphor ammonium slurry filter device realizes continuous filtration treatment；Filter bag (5)
Internal filtrate is constantly accumulated, and under the aeration effect of filter bag (5) outer surface, constantly to going to filtrate notch (2) end to increase
It is more, until completing the filtering of phosphor ammonium slurry from going to filtrate notch (2) to flow into filtrate notch；Meanwhile the surface of filter bag (5) not
Disconnected attachment filter residue adheres to filter residue, so that the ability of filter device is lower than 25-35m3When/h, the filtering of arresting stop is run,
The filtrate in filter bag (5) is poured out, and is put into cleaning solution from filter washing water inlet (6), impregnates 20-35min, and be 0.15- with pressure
The compressed air of 0.35MPa is passed through Air Exposure, infiltrates through the cleaning solution of filter bag (5) from going to cleaning solution notch (3) to enter cleaning
In liquid bath, detected for cleaning next time, then with phosphor ammonium slurry to be filtered, filter capacity is at least 25-35m3When/h, cleaning
It completes, the pH value of phosphor ammonium slurry to be filtered is 3-5, and temperature is 70-90 DEG C, solid content 1-2%, phosphorus ammonium specific gravity 1-1.3；Booting fortune
Row filtering, until the time reaches 20-25h, then is shut down, and above-mentioned cleaning method is repeated, and phosphor ammonium slurry filtering can be completed
The cleaning of device in the process of running.
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Citations (4)
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|---|---|---|---|---|
| WO2000010681A1 (en) * | 1998-08-19 | 2000-03-02 | Khs Maschinen- Und Anlagenbau Ag | Method for cleaning candles in a candle filter |
| CN101468265A (en) * | 2007-12-29 | 2009-07-01 | 上海同济科蓝环保设备工程有限公司 | Microporous film filter for acid liquor filtering |
| CN104771945A (en) * | 2015-04-29 | 2015-07-15 | 湖北君集水处理有限公司 | Can-type filter pipe filter separator |
| CN205886348U (en) * | 2016-08-11 | 2017-01-18 | 贵阳开磷化肥有限公司 | Phosphorus ammonium ground paste filter equipment |
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2016
- 2016-08-11 CN CN201610653161.XA patent/CN106139681B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000010681A1 (en) * | 1998-08-19 | 2000-03-02 | Khs Maschinen- Und Anlagenbau Ag | Method for cleaning candles in a candle filter |
| CN101468265A (en) * | 2007-12-29 | 2009-07-01 | 上海同济科蓝环保设备工程有限公司 | Microporous film filter for acid liquor filtering |
| CN104771945A (en) * | 2015-04-29 | 2015-07-15 | 湖北君集水处理有限公司 | Can-type filter pipe filter separator |
| CN205886348U (en) * | 2016-08-11 | 2017-01-18 | 贵阳开磷化肥有限公司 | Phosphorus ammonium ground paste filter equipment |
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