CN114712941A - Method for cleaning monoammonium phosphate filter cloth - Google Patents
Method for cleaning monoammonium phosphate filter cloth Download PDFInfo
- Publication number
- CN114712941A CN114712941A CN202210380184.3A CN202210380184A CN114712941A CN 114712941 A CN114712941 A CN 114712941A CN 202210380184 A CN202210380184 A CN 202210380184A CN 114712941 A CN114712941 A CN 114712941A
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- CN
- China
- Prior art keywords
- filter cloth
- cleaning
- soaking
- monoammonium phosphate
- centrifugal dehydration
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- 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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- 239000004744 fabric Substances 0.000 title claims abstract description 112
- 238000004140 cleaning Methods 0.000 title claims abstract description 46
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 26
- 235000019837 monoammonium phosphate Nutrition 0.000 title claims abstract description 26
- 239000006012 monoammonium phosphate Substances 0.000 title claims abstract description 19
- 238000002791 soaking Methods 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 238000005406 washing Methods 0.000 claims abstract description 20
- 230000018044 dehydration Effects 0.000 claims abstract description 18
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 10
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 8
- 239000003814 drug Substances 0.000 claims abstract description 3
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims description 18
- 239000012459 cleaning agent Substances 0.000 claims description 11
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 8
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 8
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 8
- 239000001099 ammonium carbonate Substances 0.000 claims description 8
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 235000010344 sodium nitrate Nutrition 0.000 claims description 4
- 239000004317 sodium nitrate Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 2
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 8
- 239000004254 Ammonium phosphate Substances 0.000 abstract description 3
- 229910000148 ammonium phosphate Inorganic materials 0.000 abstract description 3
- 235000019289 ammonium phosphates Nutrition 0.000 abstract description 3
- 239000013043 chemical agent Substances 0.000 abstract description 3
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000008394 flocculating agent Substances 0.000 abstract description 2
- 238000010992 reflux Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 4
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910000398 iron phosphate Inorganic materials 0.000 description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 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 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a method for cleaning monoammonium phosphate filtering cloth, which comprises the following steps: high-pressure washing, medicament preparation, soaking and stirring, centrifugal dehydration, neutralization, cleaning, centrifugal dehydration and drying. The filter cloth blockage cleaning effect caused by insoluble impurities in ammonium phosphate and the PAM flocculating agent is good, the filtering effect after the filter cloth is cleaned after failure is equivalent to that of a new filter cloth, the dosage of a neutralizing solution is reduced by centrifugal dehydration of the soaked filter cloth, the dosage of a chemical agent in a soaking and stirring pool is reduced by refluxing the centrifugal dehydration solution into a soaking pool, the cleaning speed of the filter cloth is high, the cleaning effect and the cleaning speed of the filter cloth are improved by simple soaking and stirring, and the filter cloth is cleaned by water and then dried, so that the filter cloth is not damaged.
Description
Technical Field
The invention belongs to the technical field of chemical industry, and particularly relates to a method for cleaning filter cloth of a plate-and-frame filter press in the production and use processes of ammonium dihydrogen phosphate.
Background
Ammonium dihydrogen phosphate is an important chemical raw material, also called monoammonium phosphate, and is mainly used as a fertilizer, a fire retardant, a pharmaceutical and feed additive and the like. The neutralization slurry method is an important process for producing monoammonium phosphate, is widely applied due to excellent process characteristics, and a small amount of insoluble impurities such as calcium, magnesium, fluorine and the like are always contained in the product.
With the development of new energy markets and the progress of lithium iron phosphate battery technologies, the demand of lithium iron phosphate battery materials is gradually increased, ammonium dihydrogen phosphate is one of raw materials for producing the lithium iron phosphate battery materials, and impurities in the raw materials must be separated and removed in order to improve the product quality. Mainly removes insoluble impurities by solid-liquid separation after dissolving ammonium dihydrogen phosphate. The filter press is a commonly used filtering separation equipment, and its solid-liquid separation efficiency is high, and the filter cake water content is low, uses the filter press to carry out the filtering separation of monoammonium phosphate solution usually, gets rid of the insoluble impurity in the solution, and the cloth that strains becomes hard after using a period blocks up, and the permeation efficiency descends, and filtration efficiency greatly reduced. The precipitate is piled up in the fibre of filter cloth, and the sediment back is attached to on the fibre and makes the filtration pore reduce, is difficult to get rid of the solid deposit attached to in the filter cloth through washing or pickling, and the filter cloth solution percent of pass descends after using for a period of time, leads to filtration efficiency to descend, finally leads to the unable continuation operation of pressure filter, has influenced production efficiency greatly, and the filter cloth can't use and cause the waste of filter cloth simultaneously.
In patent CN104548754B, the filter cloth for filtering ammonium phosphate is cleaned by a method of soaking and cleaning the filter cloth in hot water after soaking the filter cloth in sodium fluosilicate mother liquor, the service cycle of the filter cloth can be prolonged by one third after cleaning, and the use effect of the cleaned filter cloth is equivalent to that of a normal filter cloth. However, analysis of insoluble impurities shows that the impurity components are mainly phosphate, calcium salt, fluoride, alumina and silicate compounds, and are hardly soluble in conventional acids or bases, and thus are difficult to remove.
Disclosure of Invention
Technical problem to be solved
The invention provides a method for chemically cleaning filter cloth, aiming at the problem of filtration efficiency caused by difficult cleaning after the filter cloth of a plate-and-frame filter press is blocked in the ammonium dihydrogen phosphate solution process, so as to recover the original filtration capacity of the filter cloth in the plate-and-frame filter press, prolong the service life, reduce the consumption cost of the filter cloth and improve the economic benefit.
(II) technical scheme
In order to realize the purpose, the invention is realized by the following technical scheme: a method for cleaning monoammonium phosphate filter cloth comprises the following steps:
1) high-pressure washing: washing with high-pressure water to remove filter residues attached to the surface of the filter cloth;
2) preparation of the medicament: preparing a chemical cleaning agent, and filtering the chemical cleaning agent for later use;
3) soaking and stirring: putting the cleaned filter cloth into a soaking and stirring tank, adding the chemical cleaning agent filtered in the step 1 into the soaking and stirring tank, and soaking the filter cloth in the chemical cleaning agent completely, wherein the temperature of the solution in the soaking and stirring tank is 50-70 ℃, the soaking time is 40-90min, and the stirring speed is 50-150 r/min;
4) and (3) centrifugal dehydration: taking out the filter cloth from the soaking and stirring tank, putting the filter cloth into a centrifuge, and performing centrifugal dehydration;
5) neutralizing: washing the filter cloth subjected to centrifugal dehydration for 5-10 seconds by using a neutralization solution, neutralizing residual acid on the filter cloth, and removing trace suspended matters attached to the surface of the filter cloth after reaction;
6) cleaning: washing and washing for 10-15 seconds by using clear water, and removing a neutralization solution on the surface of the filter cloth;
7) and (3) centrifugal dehydration: then the filter cloth is put into a centrifuge for centrifugal dehydration;
8) drying: drying the filter cloth subjected to centrifugal dehydration, and collecting and storing the filter cloth after drying.
Preferably, the water in step 1 may be clear water or condensed water.
Preferably, the chemical cleaning agent in the step 2 and the step 3 is prepared from 3-6% of ammonium chloride, 10-20% of sodium nitrate, 5-10% of sulfuric acid, 0.5-1.5% of EDTA and the rest water, and the chemical cleaning agent is filtered by a filter bag of 5 micrometers and then placed into a soaking and stirring tank for cleaning filter cloth, and the temperature in the tank is controlled by heating with a heater or steam.
Preferably, the centrifugal rotation speed of the centrifuge in the step 4 is 800-1200r/min, and the centrifuged water flows back to the soaking and stirring pool.
Preferably, the neutralization solution in the step 5 is 3-5% of ammonium bicarbonate or sodium bicarbonate solution.
Preferably, the washing water in step 6 is used for preparing a neutralization solution, so that the water and bicarbonate agent dosage is saved.
Preferably, the centrifuge centrifugation rotating speed in the step 7 is 800-.
Preferably, the filter cloth drying in the step 8 adopts a steam dryer, and the drying temperature is 60-80 ℃.
(III) advantageous effects
The invention provides a method for cleaning monoammonium phosphate filter cloth. The method has the following beneficial effects:
1. the cleaning method of the monoammonium phosphate filter cloth has a good cleaning effect on filter cloth blockage caused by insoluble impurities in ammonium phosphate and PAM flocculating agent, so that the filtering effect of the ineffective filter cloth after cleaning is equivalent to that of a new filter cloth.
2. According to the method for cleaning the monoammonium phosphate filtering filter cloth, the dosage of the chemical agent in the neutralizing solution is reduced through centrifugal dehydration of the soaked filter cloth, and the dosage of the chemical agent in the soaking and stirring tank is reduced through the backflow of the centrifugal dehydration solution into the soaking tank.
3. The cleaning method of the monoammonium phosphate filter cloth has the advantages that the cleaning speed of the filter cloth is high, the cleaning effect and the cleaning speed of the filter cloth are improved through simple soaking and stirring, the filter cloth is washed by water and then dried, and the filter cloth is not damaged.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
preparing a chemical cleaning solution with the ammonium chloride content of 3%, the sodium nitrate content of 15%, the sulfuric acid content of 6% and the EDTA content of 0.5%, filtering the chemical cleaning solution by a filter bag with the diameter of 5 microns, putting the chemical cleaning solution into a soaking and stirring tank, and preparing an ammonium bicarbonate solution with the concentration of 3% and putting the ammonium bicarbonate solution into a neutralizing solution storage barrel.
Filter cloth of a filter press for filtering ammonium dihydrogen phosphate solution in certain iron phosphate production enterprises is taken, after the filter cloth is used, the filter cloth is blocked and hardened, the filtering speed is reduced to 1/5, and the production efficiency is seriously influenced.
The filter cloth cleaning method comprises the following steps:
(1) simply washing the filter cloth by using a high-pressure water gun to remove filter residues on the surface of the filter cloth;
(2) completely immersing the filter cloth into a soaking stirring tank for reaction for 60min at the temperature of 60 ℃ and the stirring speed of 100 r/min;
(3) taking out the filter cloth, and centrifuging for 1min by using a centrifuge under the condition that the centrifugal rotating speed is 800 r/min;
(4) and taking the filter cloth out of the centrifuge, washing the filter cloth for 5 seconds by using a 3% ammonium bicarbonate solution, washing the filter cloth for 10 seconds by using clear water, centrifuging the filter cloth, and drying the filter cloth in a drying oven at the temperature of 70 ℃.
The dirt on the surface of the filter cloth after being cleaned and dried is cleaned, the filter cloth becomes soft and returns to the original color, and the filtering speed of the filter cloth is equivalent to that of the new filter cloth.
Example 2:
preparing a chemical cleaning solution with the ammonium chloride content of 5%, the sodium nitrate content of 20%, the sulfuric acid content of 8% and the EDTA content of 1%, filtering the chemical cleaning solution by a filter bag with the thickness of 5 microns, putting the chemical cleaning solution into a soaking and stirring tank, and preparing an ammonium bicarbonate solution with the concentration of 4% by using the cleaning water obtained in the step (4) in the embodiment 1, and putting the ammonium bicarbonate solution into a neutralizing solution storage barrel.
Filter cloth of a filter press for filtering ammonium dihydrogen phosphate solution in certain iron phosphate production enterprises is taken, after the filter cloth is used, the filter cloth is blocked and hardened, the filtering speed is reduced to 1/5, and the production efficiency is seriously influenced.
The filter cloth cleaning method comprises the following steps:
(1) simply washing the filter cloth by using a high-pressure water gun to remove filter residues on the surface of the filter cloth;
(2) completely immersing the filter cloth into a soaking stirring tank for reaction for 60min, wherein the temperature is 70 ℃, and the stirring speed is 120 r/min;
(3) taking out the filter cloth, and centrifuging for 1min by using a centrifuge under the condition that the centrifugal rotating speed is 1000 r/min;
(4) and taking the filter cloth out of the centrifuge, washing the filter cloth for 5 seconds by using a 4% ammonium bicarbonate solution, washing the filter cloth for 10 seconds by using clear water, centrifuging the filter cloth, and drying the filter cloth in a drying oven at the temperature of 70 ℃.
Dirt on the surface of the filter cloth after cleaning is cleaned, the filter cloth is recovered to be white originally, the filter cloth becomes soft, and the filtering speed of the filter cloth after cleaning is not obviously different from that of a new filter cloth.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for cleaning monoammonium phosphate filter cloth is characterized by comprising the following steps:
1) high-pressure washing: washing with high-pressure water to remove filter residues attached to the surface of the filter cloth;
2) preparation of the medicament: preparing a chemical cleaning agent, and filtering the chemical cleaning agent for later use;
3) soaking and stirring: putting the cleaned filter cloth into a soaking and stirring tank, adding the chemical cleaning agent filtered in the step 1 into the soaking and stirring tank, and soaking the filter cloth in the chemical cleaning agent completely, wherein the temperature of the solution in the soaking and stirring tank is 50-70 ℃, the soaking time is 40-90min, and the stirring speed is 50-150 r/min;
4) and (3) centrifugal dehydration: taking out the filter cloth from the soaking and stirring tank, putting the filter cloth into a centrifuge, and performing centrifugal dehydration;
5) neutralizing: washing the filter cloth subjected to centrifugal dehydration for 5-10 seconds by using a neutralization solution, neutralizing residual acid on the filter cloth, and removing trace suspended matters attached to the surface of the filter cloth after reaction;
6) cleaning: washing and washing for 10-15 seconds by using clear water, and removing a neutralization solution on the surface of the filter cloth;
7) and (3) centrifugal dehydration: then the filter cloth is put into a centrifuge for centrifugal dehydration;
8) drying: drying the filter cloth subjected to centrifugal dehydration, and collecting and storing the filter cloth after drying.
2. The method for cleaning a monoammonium phosphate filter cloth according to claim 1, wherein: the water in the step 1 can be clear water or condensed water.
3. The method for cleaning a monoammonium phosphate filter cloth according to claim 1, wherein: the chemical cleaning agent in the step 2 and the step 3 is prepared from 3-6% of ammonium chloride, 10-20% of sodium nitrate, 5-10% of sulfuric acid, 0.5-1.5% of EDTA and the rest water, is filtered by a filter bag with the diameter of 5 microns, is placed in a soaking and stirring tank for cleaning filter cloth, and is heated by a heater or steam to control the temperature in the tank.
4. The method for cleaning a monoammonium phosphate filter cloth according to claim 1, wherein: and 4, the centrifugal rotating speed of the centrifugal machine in the step 4 is 800-.
5. The method for cleaning a monoammonium phosphate filter cloth according to claim 1, wherein: and the neutralization solution in the step 5 is 3-5% of ammonium bicarbonate or sodium bicarbonate solution.
6. The method for cleaning a monoammonium phosphate filter cloth according to claim 1, wherein: the washing water in the step 6 is used for preparing a neutralization solution, so that the water and bicarbonate agent consumption is saved.
7. The method for cleaning a monoammonium phosphate filter cloth according to claim 1, wherein: the centrifugal rotating speed of the centrifugal machine in the step 7 is 800-.
8. The method for cleaning a monoammonium phosphate filter cloth according to claim 1, wherein: and (3) drying the filter cloth in the step (8) by using a steam dryer at the drying temperature of 60-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210380184.3A CN114712941A (en) | 2022-04-12 | 2022-04-12 | Method for cleaning monoammonium phosphate filter cloth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210380184.3A CN114712941A (en) | 2022-04-12 | 2022-04-12 | Method for cleaning monoammonium phosphate filter cloth |
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| Publication Number | Publication Date |
|---|---|
| CN114712941A true CN114712941A (en) | 2022-07-08 |
Family
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|---|---|---|---|
| CN202210380184.3A Pending CN114712941A (en) | 2022-04-12 | 2022-04-12 | Method for cleaning monoammonium phosphate filter cloth |
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Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344608A (en) * | 2000-09-19 | 2002-04-17 | 富士胶片株式会社 | Cyclic use of plastic products and method and apparatus for cleaning and crushing plastic |
| US20090078014A1 (en) * | 2007-09-25 | 2009-03-26 | Yamashita Thomas T | Agricultural compositions and methods for making and using the same |
| CN101708403A (en) * | 2009-12-19 | 2010-05-19 | 中北大学 | Off-line cleaning method of filter press nylon filtration fabric based on iron ore concentrate slurry dehydration blocking invalidation |
| CN102145340A (en) * | 2010-11-23 | 2011-08-10 | 瓮福（集团）有限责任公司 | Mechanical cleaning method of tube still heater |
| CN102755973A (en) * | 2012-07-23 | 2012-10-31 | 瓮福（集团）有限责任公司 | Method for cleaning filtering cloth used in crystal MAP (monoammonium phosphate) production with raffinate |
| CN102784774A (en) * | 2012-08-08 | 2012-11-21 | 安徽六国化工股份有限公司 | Method for cleaning monoammonium phosphate inlet pipeline |
| CN102921305A (en) * | 2012-10-25 | 2013-02-13 | 贵阳时代沃顿科技有限公司 | Cleaning agent and cleaning method for removing residual aromatic amine substances in reverse osmosis membrane |
| CN103242986A (en) * | 2013-04-16 | 2013-08-14 | 太仓市宝马环境工程有限公司 | Calcium sulfate scale cleaning agent and preparation method thereof |
| JP2013240769A (en) * | 2012-05-22 | 2013-12-05 | Kurita Water Ind Ltd | Method for washing filter press |
| CN103923765A (en) * | 2013-01-15 | 2014-07-16 | 株式会社巨元新科技 | Detergent Composition For Process Of Manufacturing Semiconductors And Displays |
| CN103977711A (en) * | 2014-05-16 | 2014-08-13 | 威海翔宇环保科技有限公司 | Compound cleaner for cleaning reverse osmosis membrane and preparation method of compound cleaner |
| CN104524981A (en) * | 2014-12-31 | 2015-04-22 | 伊犁川宁生物技术有限公司 | Acid membrane cleaning agent and preparation method thereof |
| CN104548754A (en) * | 2014-12-25 | 2015-04-29 | 湖北祥云(集团)化工股份有限公司 | Cleaning method for ammonium phosphate filter cloth |
| CN105176714A (en) * | 2015-07-15 | 2015-12-23 | 湖北瑞锶科技有限公司 | PMIDA pressure filter filtration cloth cleaning liquid and cleaning method thereof |
| CN106943880A (en) * | 2017-01-17 | 2017-07-14 | 南京中材水务股份有限公司 | A kind of cleaning agents of membrane, its preparation method and its application |
| CN111167219A (en) * | 2020-01-17 | 2020-05-19 | 岳阳林纸股份有限公司 | Method for cleaning filter cloth |
| CN112007430A (en) * | 2020-08-19 | 2020-12-01 | 界首万昌新材料技术有限公司 | Industrial filter cloth cleaning process |
| CN113308699A (en) * | 2021-05-26 | 2021-08-27 | 廊坊市冀方科技有限公司 | Composite cleaning agent and preparation method and application thereof |
| JP2021187867A (en) * | 2020-05-25 | 2021-12-13 | 四国化成工業株式会社 | Foamable detergent and its use method |
| CN113789226A (en) * | 2021-10-25 | 2021-12-14 | 安徽省华凯轻工科技有限公司 | Tea dirt cleaning agent |
| CN113975896A (en) * | 2021-12-02 | 2022-01-28 | 广东聚力胜智能科技有限公司 | Method for cleaning filter cloth of plate-frame filter press in iron phosphate production process |
-
2022
- 2022-04-12 CN CN202210380184.3A patent/CN114712941A/en active Pending
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344608A (en) * | 2000-09-19 | 2002-04-17 | 富士胶片株式会社 | Cyclic use of plastic products and method and apparatus for cleaning and crushing plastic |
| US20090078014A1 (en) * | 2007-09-25 | 2009-03-26 | Yamashita Thomas T | Agricultural compositions and methods for making and using the same |
| CN101708403A (en) * | 2009-12-19 | 2010-05-19 | 中北大学 | Off-line cleaning method of filter press nylon filtration fabric based on iron ore concentrate slurry dehydration blocking invalidation |
| CN102145340A (en) * | 2010-11-23 | 2011-08-10 | 瓮福（集团）有限责任公司 | Mechanical cleaning method of tube still heater |
| JP2013240769A (en) * | 2012-05-22 | 2013-12-05 | Kurita Water Ind Ltd | Method for washing filter press |
| CN102755973A (en) * | 2012-07-23 | 2012-10-31 | 瓮福（集团）有限责任公司 | Method for cleaning filtering cloth used in crystal MAP (monoammonium phosphate) production with raffinate |
| CN102784774A (en) * | 2012-08-08 | 2012-11-21 | 安徽六国化工股份有限公司 | Method for cleaning monoammonium phosphate inlet pipeline |
| CN102921305A (en) * | 2012-10-25 | 2013-02-13 | 贵阳时代沃顿科技有限公司 | Cleaning agent and cleaning method for removing residual aromatic amine substances in reverse osmosis membrane |
| CN103923765A (en) * | 2013-01-15 | 2014-07-16 | 株式会社巨元新科技 | Detergent Composition For Process Of Manufacturing Semiconductors And Displays |
| CN103242986A (en) * | 2013-04-16 | 2013-08-14 | 太仓市宝马环境工程有限公司 | Calcium sulfate scale cleaning agent and preparation method thereof |
| CN103977711A (en) * | 2014-05-16 | 2014-08-13 | 威海翔宇环保科技有限公司 | Compound cleaner for cleaning reverse osmosis membrane and preparation method of compound cleaner |
| CN104548754A (en) * | 2014-12-25 | 2015-04-29 | 湖北祥云(集团)化工股份有限公司 | Cleaning method for ammonium phosphate filter cloth |
| CN104524981A (en) * | 2014-12-31 | 2015-04-22 | 伊犁川宁生物技术有限公司 | Acid membrane cleaning agent and preparation method thereof |
| CN105176714A (en) * | 2015-07-15 | 2015-12-23 | 湖北瑞锶科技有限公司 | PMIDA pressure filter filtration cloth cleaning liquid and cleaning method thereof |
| CN106943880A (en) * | 2017-01-17 | 2017-07-14 | 南京中材水务股份有限公司 | A kind of cleaning agents of membrane, its preparation method and its application |
| CN111167219A (en) * | 2020-01-17 | 2020-05-19 | 岳阳林纸股份有限公司 | Method for cleaning filter cloth |
| JP2021187867A (en) * | 2020-05-25 | 2021-12-13 | 四国化成工業株式会社 | Foamable detergent and its use method |
| CN112007430A (en) * | 2020-08-19 | 2020-12-01 | 界首万昌新材料技术有限公司 | Industrial filter cloth cleaning process |
| CN113308699A (en) * | 2021-05-26 | 2021-08-27 | 廊坊市冀方科技有限公司 | Composite cleaning agent and preparation method and application thereof |
| CN113789226A (en) * | 2021-10-25 | 2021-12-14 | 安徽省华凯轻工科技有限公司 | Tea dirt cleaning agent |
| CN113975896A (en) * | 2021-12-02 | 2022-01-28 | 广东聚力胜智能科技有限公司 | Method for cleaning filter cloth of plate-frame filter press in iron phosphate production process |
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