CN115895789A - Universal cleaning agent for cleaning cartridge filter element of security filter and online cleaning process - Google Patents
Universal cleaning agent for cleaning cartridge filter element of security filter and online cleaning process Download PDFInfo
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- CN115895789A CN115895789A CN202211344976.1A CN202211344976A CN115895789A CN 115895789 A CN115895789 A CN 115895789A CN 202211344976 A CN202211344976 A CN 202211344976A CN 115895789 A CN115895789 A CN 115895789A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 83
- 239000012459 cleaning agent Substances 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 230000004907 flux Effects 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000002352 surface water Substances 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 32
- 239000002608 ionic liquid Substances 0.000 claims description 24
- 239000007853 buffer solution Substances 0.000 claims description 20
- 239000003814 drug Substances 0.000 claims description 18
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- XPFJYKARVSSRHE-UHFFFAOYSA-K trisodium;2-hydroxypropane-1,2,3-tricarboxylate;2-hydroxypropane-1,2,3-tricarboxylic acid Chemical compound [Na+].[Na+].[Na+].OC(=O)CC(O)(C(O)=O)CC(O)=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O XPFJYKARVSSRHE-UHFFFAOYSA-K 0.000 claims description 12
- 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 11
- 230000000694 effects Effects 0.000 claims description 11
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- 239000011812 mixed powder Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 150000004714 phosphonium salts Chemical group 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
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- PNGBYKXZVCIZRN-UHFFFAOYSA-M sodium;hexadecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCCCCCS([O-])(=O)=O PNGBYKXZVCIZRN-UHFFFAOYSA-M 0.000 claims description 3
- GGHPAKFFUZUEKL-UHFFFAOYSA-M sodium;hexadecyl sulfate Chemical compound [Na+].CCCCCCCCCCCCCCCCOS([O-])(=O)=O GGHPAKFFUZUEKL-UHFFFAOYSA-M 0.000 claims description 3
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 2
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 14
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- UJGIYHXRNBCGRE-UHFFFAOYSA-N C(CCCCCCCCCCCCCCC)[Na] Chemical compound C(CCCCCCCCCCCCCCC)[Na] UJGIYHXRNBCGRE-UHFFFAOYSA-N 0.000 description 1
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- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229940080236 sodium cetyl sulfate Drugs 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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Abstract
The invention discloses a universal cleaning agent for cleaning a cartridge filter element of a security filter and an online cleaning process, belongs to the field of chemical cleaning, and realizes the cleaning of the cartridge filter element of the security filter which is polluted and blocked in the process of recycling various water sources such as reclaimed water, surface water, mine water and the like in a city by constructing the cartridge filter element cleaning process which is used for the pollution and blocking in the recycling process of various water sources based on the universal cleaning agent, thereby realizing the remarkable recovery of the flux and the service cycle of the cartridge filter element of the security filter of various pollution and blocking types. The invention can directly clean the filter element in the security filter without disassembling and reassembling the filter element of the security filter, thereby greatly reducing the workload. Meanwhile, the whole cleaning process line is provided with a sewage discharge system, so that the problems of periodical cleaning liquid replacement and the like are not needed, the online cleaning of the cartridge filter element can be realized in a matched manner, and the method has a wide application prospect.
Description
Technical Field
The invention belongs to the field of chemical cleaning, and particularly relates to a universal cleaning agent for cleaning a cartridge filter element of a security filter and an online cleaning process.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The current reverse osmosis system uses more and more extensively in the electricity generation enterprise, for example reverse osmosis system can handle the normal water, surface water, mine water etc. for obtain the required circulating water of power plant and the moisturizing of boiler water, but in the application, because the problem at water source, when utilizing water sources such as normal water, because the stifled cartridge filter that causes of cartridge filter core pollution changes frequently, influence normal system water process, and the price of changing cartridge filter core is on the high side, make system water cost on the high side, and then influence the cost of whole power generation process.
Cleaning the cartridge filter element with a chemical agent is an effective way to clean the cartridge filter element. Because of the tightness of the cartridge filter element, the cleaning effect is poor by adopting modes such as soaking and the like, and the flux of the cartridge filter element is difficult to effectively recover. Generally, the cleaning of the cartridge filter adopts a physical auxiliary means, for example, the filter element is taken out and then soaked in a chemical agent, and a brush is adopted for brushing or a back flushing manner is adopted for washing, and the cleaning manners have the problems of increasing the cleaning workload, influencing the quality of the filter element, causing the deformation of the filter element to influence the filtering and cleaning, and the like. In addition, in the water production process by utilizing different water sources, the dirt sample components of the security filter which are polluted and blocked are different, and chemical cleaning reagents need to be configured according to experience or experimental analysis data, so that a good cleaning effect of the security filter is obtained, the sampling inspection consumes time and labor, and the cleaning period is prolonged.
Therefore, a safe and efficient cleaning process for the cartridge filter of the security filter, which can effectively remove scale samples formed in the treatment process of various water bodies, is urgently needed.
Disclosure of Invention
The universal cleaning agent provided by the invention does not need special components, is easy to realize in a preparation process, and can realize high-efficiency cleaning of the cartridge of the security filter.
In order to achieve the purpose, the technical scheme of the invention is as follows:
in one aspect, the universal cleaning agent for cleaning the filter element of the security filter is prepared by the following steps: preparing a citric acid-sodium citrate buffer solution, mixing and dissolving the ionic liquid, the EDTA and the surfactant in the buffer solution, fully shaking, and then adjusting the pH value with hydrochloric acid to completely dissolve the ionic liquid to obtain the cleaning agent.
In another aspect, an on-line cleaning process for a cartridge filter element comprises the following steps:
(1) Preparing the universal cleaning agent;
(2) Erecting a cleaning system: sequentially connecting a security filter, a solid-liquid separator, a medicament tank and a forced circulation pump, wherein an outlet of the forced circulation pump is connected with an inlet of the security filter to form a closed loop structure, and a sludge discharge port of the solid-liquid separator is connected to a pit;
(3) Circularly cleaning the filter element: and adding a cleaning agent into the medicament tank, starting the forced circulation pump to enable the cleaning agent to circulate among the cartridge filter, the solid-liquid separator and the medicament tank, and regularly discharging sludge through a sludge discharge port of the solid-liquid separator.
The invention has the beneficial effects that:
the universal cleaning agent can effectively dissolve scale samples formed in the treatment process of various water bodies, including scale samples formed in the treatment process of urban reclaimed water, surface water, mine water and the like by using a security filter, and can realize efficient dissolution. The universal cleaning agent disclosed by the invention is simple in index process, does not need complex or difficult-to-purchase medicaments, and has wide requirements on the types of ionic liquids.
The on-line cleaning process for the filter element of the security filter realizes the cleaning of the filter element of the security filter which is polluted and blocked in the process of recycling various water sources such as reclaimed water, surface water, mine water and the like in a city by constructing the cleaning process for the filter element of the security filter which is polluted and blocked in the process of recycling various water sources based on the universal cleaning agent, and realizes the remarkable recovery of the flux and the service cycle of the filter element of the security filter with various pollution and blockage types. On the one hand, the process has a good removing effect on scale samples of various main components, can realize the cleaning of the filter element of the security filter, is easy to realize the cleaning process, does not need to disassemble the security filter, adopts the forward flushing type washing process to clean the security filter, and can avoid the phenomenon that the filter element is deformed to influence the normal use of the filter element in the backward flushing type. On the other hand, the process can directly clean the filter element in the cartridge filter without disassembling and re-installing the cartridge filter element, thereby greatly reducing the workload. Meanwhile, the whole cleaning process line is provided with a sewage discharge system, so that the cleaning and sewage discharge can be realized simultaneously in the cleaning process, the quality of the cleaning liquid is maintained, the pollution of the cleaned residues to the security filter is avoided, the problems of regular replacement of the cleaning liquid and the like are avoided, and the cleaning efficiency of the security filter is greatly improved. The online cleaning process for the filter element of the security filter has extremely high efficiency in the cleaning process and obvious cleaning effect, can effectively clean the filter element of the security filter with different pollution degrees and fouling in various chemical water making processes on line, obtains good cleaning effect, reduces the maintenance and operation costs in the chemical water making processes, and ensures the normal water making processes, thereby having wide application prospect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a block diagram of a cleaning system according to an embodiment of the present invention.
Wherein, 1: cartridge filter, 2: medicament can, 3: forced circulation pump, 4: solid-liquid separation tank, 5: cleaning agent tank, 6: hydrochloric acid tank, 7: removing a trench, 8: and (4) emergency discharge.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Interpretation of terms:
initial operation period: the new cartridge is used from the beginning to the period when it is plugged and cannot be used further.
The invention provides a universal cleaning agent for cleaning a cartridge filter element of a security filter and an online cleaning process, aiming at the current situation that the cartridge filter element of the security filter is frequently polluted and blocked and is difficult to recover in the process of recycling reclaimed water, mine water and the like of the current power generation enterprises.
The invention provides a universal cleaning agent for cleaning a cartridge filter element of a security filter, which is prepared by the following steps: preparing a citric acid-sodium citrate buffer solution, mixing and dissolving the ionic liquid, the EDTA and the surfactant in the buffer solution, fully shaking, and adjusting the pH value by using hydrochloric acid to completely dissolve the ionic liquid to obtain the cleaning agent.
The ionic liquid is also called universal solvent, and has the characteristic of scale sample components, and quaternary ammonium salt and quaternary phosphonium salt are selected as the ionic liquid selected in the cleaning agent, so that the main components of the scale sample are dissolved, and the effect of destroying the scale sample is realized. The surfactant, which is also a cleaning agent, has a cleaning effect on part of organic pollutants and is helpful for the cleaning agent to form a uniform and stable solution. EDTA is a chelating agent, is beneficial to increasing the cleaning effect of ionic liquid and surfactant and is beneficial to tile scale removal. The buffer solution adopts a citric acid-sodium citrate system, and in the buffer solution with a certain pH range, the ionic liquid can play a role in dissolving various scale samples, and meanwhile, the acid pickling environment and the citrate can also damage various scale samples.
In some embodiments of this embodiment, the ionic liquid is both quaternary ammonium salt-based or quaternary phosphonium salt-based ionic liquids.
In some examples of this embodiment, the surfactant comprises sodium cetyl sulfonate, sodium cetyl sulfate, cetyl trimethylammonium bromide, sodium dodecyl sulfate.
In some embodiments of this embodiment, the ionic liquid: EDTA: the mass ratio of the surface active agent is 10-15:1-5:1-5, preferably 10-12:1-2:2-3.
In some examples of this embodiment, the mass ratio of mixed powder to buffer solution is 1-3:100. the mixed powder is a mixture of EDTA and a surfactant.
In some examples of this embodiment, the concentration of the citric acid-sodium citrate buffer solution is 0.1 to 0.3mol/L, preferably 0.1mol/L.
In some examples of this embodiment, the initial pH of the citric acid-sodium citrate buffer solution is in the range of 4-4.5 and the pH is adjusted to 3-3.5, preferably 3.5, with hydrochloric acid.
In some embodiments of this embodiment, the cartridge filter element comprises a cartridge filter element that causes fouling during filtration of recycled reclaimed water, surface water, and mine water. The scale sample of the water in urban recycling is mainly a calcium-magnesium composite oxide combined organic matter scale sample, the scale sample of the surface water is mainly a calcium-magnesium-silicon-aluminum combined substance and the like combined with a small amount of organic matter scale sample, and the mine water is mainly a composite scale sample formed by calcium sulfate, calcium phosphate and silicon substances. The universal cleaning agent disclosed by the invention can be used for efficiently removing various dirt samples.
In another exemplary embodiment of the present invention, an on-line cleaning process for a cartridge filter cartridge is provided, which comprises the following steps:
(1) Preparing a universal cleaning agent for cleaning the cartridge filter element of the security filter;
(2) Erecting a cleaning system: sequentially connecting a security filter, a solid-liquid separator, a medicament tank and a forced circulation pump, wherein an outlet of the forced circulation pump is connected with an inlet of the security filter to form a closed loop structure, and a sludge discharge port of the solid-liquid separator is connected to a pit;
(3) Circularly cleaning the filter element: and adding a cleaning agent into the medicament tank, starting the forced circulation pump to enable the cleaning agent to circulate among the cartridge filter, the solid-liquid separator and the medicament tank, and regularly discharging sludge through a sludge discharge port of the solid-liquid separator.
In some embodiments of this embodiment, the cartridge filter cartridge online cleaning process further comprises: and inspecting and recording the flux recovery condition, the operation pressure difference condition and the cleaning period condition of the cartridge filter, and judging the effect of the cleaning process.
In some examples of the embodiment, the cleaning agent tank and the hydrochloric acid tank are both connected with the medicament tank and used for adding cleaning agent or hydrochloric acid into the medicament tank.
In some examples of this embodiment, the sludge discharge is performed for 2-3min per 20-40min of forced circulation, and preferably for 2min per 30min of forced circulation.
In some examples of this embodiment, the hydrochloric acid is added to reduce the pH to below 4 when the pH of the cleaning agent is greater than 5, and the cleaning agent is added when the level of the cleaning agent after operation is reduced to two thirds of the original level.
In some examples of the embodiment, in the circulating cleaning process, the cleaning is stopped when the water inlet pressure of the cartridge filter is reduced to 0.1MPa, and the water is drained.
In some embodiments of this embodiment, the cartridge filter element comprises a cartridge filter element that causes fouling during filtration of recycled reclaimed water, surface water, and mine water.
In some examples of this embodiment, when the cleaning system is erected, the pipes are connected by screws, so that the pipes can bear an operating pressure of 1.0MPa after being connected.
Preferably, the solid-liquid separator comprises one of a conical settler, a continuous centrifuge, and a baffled settler.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
Online cleaning process for cartridge filter element
(1) Preparing a universal cleaning agent: mixing ionic liquid, EDTA and sodium hexadecyl sulfonate, and dissolving the mixture in 0.1mol/L citric acid-sodium citrate buffer solution, wherein the ionic liquid: EDTA: the mass ratio of the hexadecyl sodium sulfonate is 10:1: and 2, the mass ratio of the mixed powder to the buffer solution is 1:100. the initial pH of the 0.1mol/L citric acid-sodium citrate buffer solution ranged from 4 to 4.5, and the pH was adjusted to 3.5 with hydrochloric acid. Fully shaking to dissolve the ionic liquid completely to obtain the universal cleaning agent.
(2) Erecting a cleaning system: use hua can canal power plant 1 phase water preparation system take place dirty stifled safety filter as the processing object in retrieval and utilization city normal water in-process, erect cleaning system, as shown in figure 1, connect safety filter 1, solid-liquid separator 4, medicament jar 2, forced circulation pump 3 in proper order, the export of forced circulation pump 3 links to each other with safety filter 1 entry, form closed loop structure, the mud discharging port of solid-liquid separator 4 is connected to the pit, cleaner jar 5 all links to each other with medicament jar 2 with hydrochloric acid jar 6, still be equipped with urgent flowing back on the medicament jar 2.
(3) Circularly cleaning a filter element of a security filter: adding a cleaning agent into the agent tank, starting the forced circulation pump 3 to enable the cleaning agent to circulate among the agent tank 2, the cartridge filter 1 and the solid-liquid separation tank 4, discharging sludge once every 30min of forced circulation, wherein the sludge discharging time is 2min, adding hydrochloric acid to reduce the pH to be below 4 when the pH of the cleaning agent is more than 5, and adding the cleaning agent when the liquid level of the cleaning agent after operation is reduced to two thirds of the original liquid level. When the water inlet pressure of the cartridge filter is reduced to 0.1MPa, the cleaning is stopped, and water is discharged.
(4) Cartridge filter element cleaning process evaluation: the flux condition, initial pressure and operation period of the cartridge filter are tested, wherein the flux is recovered to 99% of the initial flux, the pressure during fouling and blocking is 0.27MP, the pressure is recovered to 0.08MPa after cleaning, the initial operation period is about 25 days, and the operation period after cleaning is about 24 days.
Example 2
Online cleaning process for cartridge filter element
(1) Preparing a universal cleaning agent: mixing ionic liquid, EDTA and sodium dodecyl sulfate, and dissolving the mixture in 0.1mol/L citric acid-sodium citrate buffer solution, wherein the ionic liquid: EDTA: the mass ratio of the hexadecyl sodium sulfate is 10:1: and 2, the mass ratio of the mixed powder to the buffer solution is 1:100. the initial pH of the 0.1mol/L citric acid-sodium citrate buffer solution ranged from 4 to 4.5, and the pH was adjusted to 3.5 with hydrochloric acid. Fully shaking to dissolve the ionic liquid completely to obtain the universal cleaning agent.
(2) Erecting a cleaning system: the process of cleaning the installation of the system is the same as that in the embodiment 1 by taking the cartridge filter of the Huaneng canal power plant stage 1 water production system which is polluted and blocked in the process of recycling the urban reclaimed water as a treatment object.
(3) Circularly cleaning a filter element of a security filter: the cleaning procedure was the same as in example 1.
(4) Cartridge filter element cleaning process evaluation: the flux condition, initial pressure and operation period of the cartridge filter are tested, wherein the flux is recovered to 99% of the initial flux, the pressure during fouling and blocking is 0.28MP, the pressure is recovered to 0.08MPa after cleaning, the initial operation period is about 24 days, and the operation period after cleaning is about 23 days.
Example 3
Online cleaning process for cartridge filter element
(1) Preparing a universal cleaning agent: the same as in example 1.
(2) Erecting a cleaning system: the process of cleaning the installation of the system is the same as that of the embodiment 1 by taking the cartridge filter which is polluted and blocked by the 2 nd-stage water production system of the Huanen Jiaxiang power plant in the process of recycling the reclaimed water in the city as a treatment object.
(3) Circularly cleaning a cartridge filter element: the cleaning procedure was the same as in example 1.
(4) Cartridge filter element cleaning process evaluation: the flux condition, initial pressure and operation period of the cartridge filter are tested, wherein the flux is recovered to 99.5% of the initial flux, the pressure during fouling and blocking is 0.31MP, the pressure is recovered to 0.08MPa after cleaning, the initial operation period is about 20 days, and the operation period after cleaning is about 20 days.
Example 4
Online cleaning process for cartridge filter element
(1) Preparing a universal cleaning agent: the same as in example 1.
(2) Erecting a cleaning system: the construction process of the cleaning system is the same as that in example 1, with the cartridge filter, which is polluted and blocked in the mine water recycling process, of the date mine self-prepared power plant stage 1 water production system as a treatment object.
(3) Circularly cleaning a cartridge filter element: the cleaning procedure was the same as in example 1.
(4) Cartridge filter element cleaning process evaluation: testing the flux condition, the initial pressure and the operation period of the cartridge filter, wherein the flux is recovered to 98.5% of the initial flux, the pressure during dirt blockage is 0.31MP o, the pressure is recovered to 0.1MPa after cleaning, the initial operation period is about 25 days, and the operation period after cleaning is about 22 days.
Example 5
Online cleaning process for cartridge filter element
(1) Preparing a universal cleaning agent: the same as in example 1.
(2) Erecting a cleaning system: the construction process of the cleaning system is the same as that in example 1 with a security filter as a treatment object, wherein the security filter is polluted and blocked in the mine water recycling process of the stage 1 water production system of the Yan mine self-contained power plant.
(3) Circularly cleaning a cartridge filter element: the cleaning procedure was the same as in example 1.
(4) Cartridge filter element cleaning process evaluation: the flux condition, initial pressure and operation period of the cartridge filter are tested, wherein the flux is recovered to 98.5% of the initial flux, the pressure during fouling and blocking is 0.33MP, the pressure is recovered to 0.09MPa after cleaning, the initial operation period is about 30 days, and the operation period after cleaning is about 28 days.
Example 6
Online cleaning process for cartridge filter element
(1) Preparing a universal cleaning agent: the same as in example 1.
(2) Erecting a cleaning system: the construction process of the cleaning system is the same as that in embodiment 1, with the cartridge filter which is polluted and blocked by the national energy chat power plant stage 1 water production system in the process of recycling the water in the east Changchang lake as a treatment object.
(3) Circularly cleaning a cartridge filter element: the cleaning procedure was the same as in example 1.
(4) Cartridge filter element cleaning process evaluation: the flux condition, initial pressure and operation period of the cartridge filter were tested, wherein the flux recovered to 98.5% of the initial flux, the pressure at fouling was 0.33MP, the pressure recovered to 0.09MPa after cleaning, the initial operation period was about 30 days, and the operation period after cleaning was about 28 days.
Example 7
Online cleaning process for cartridge filter element
(1) Preparing a universal cleaning agent: the same as in example 1.
(2) Erecting a cleaning system: the construction process of the cleaning system is the same as that of the embodiment 1 by taking a security filter which is polluted and blocked by a stage 1 water production system of a national energy source lotus power plant in the process of recycling water in a peony lake as a treatment object.
(3) Circularly cleaning a cartridge filter element: the cleaning procedure was the same as in example 1.
(4) Cartridge filter element cleaning process evaluation: testing the flux condition, the initial pressure and the operation period of the security filter, wherein the flux is recovered to 99% of the initial flux, the pressure during pollution blockage is 0.28MP o, the pressure is recovered to 0.1MPa after cleaning, the initial operation period is about 35 days, and the operation period after cleaning is about 30 days.
The invention mainly constructs a process for cleaning the cartridge filter element of the security filter based on the universal cleaning agent and used for the pollution blockage in the recycling process of various water sources, realizes the cleaning of the cartridge filter element of the security filter which is polluted and blocked in the recycling process of various water sources such as urban reclaimed water, surface water, mine water and the like, and realizes the remarkable recovery of the flux and the service cycle of the cartridge filter element of the security filter with a plurality of pollution blockage types. On one hand, the process has a good removing effect on scale samples of various main components, and can realize the cleaning of the filter element of the security filter, and on the other hand, the process can directly clean the filter element in the security filter without disassembling and reinstalling the filter element of the security filter, thereby greatly reducing the workload. Meanwhile, the whole cleaning process line is provided with a sewage discharge system, so that the problems of periodical cleaning liquid replacement and the like are not needed, the cleaning efficiency of the cartridge filter is greatly improved, and the method has a wide application prospect.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A universal cleaning agent for cleaning a cartridge filter element of a security filter is characterized in that the preparation method of the universal cleaning agent comprises the following steps: preparing a citric acid-sodium citrate buffer solution, mixing and dissolving the ionic liquid, the EDTA and the surfactant in the buffer solution, fully shaking, and adjusting the pH value by using hydrochloric acid to completely dissolve the ionic liquid to obtain the cleaning agent.
2. The universal cleaning agent according to claim 1, wherein the ionic liquid is a quaternary ammonium salt ionic liquid or a quaternary phosphonium salt ionic liquid;
preferably, the surfactant comprises sodium hexadecyl sulfonate, sodium hexadecyl sulfate, hexadecyl trimethyl ammonium bromide, sodium dodecyl sulfate and sodium dodecyl sulfonate;
preferably, the ionic liquid: EDTA: the mass ratio of the surfactant is 10-15:1-5:1-5, more preferably 10-12:1-2:2-3;
preferably, the mass ratio of the mixed powder to the buffer solution is 1:100-3-1:100, respectively;
preferably, the concentration of the citric acid-sodium citrate buffer solution is 0.1-0.3mol/L, and further preferably 0.1mol/L;
preferably, the initial pH of the citric acid-sodium citrate buffer solution is in the range of 4 to 4.5, and the pH is adjusted to 3 to 3.5 with hydrochloric acid, and more preferably 3.5;
preferably, the cartridge filter element comprises a cartridge filter element for filtering recycled reclaimed water, surface water and mine water to cause pollution and blockage.
3. An on-line cleaning process for a cartridge filter element is characterized by comprising the following steps:
(1) Preparing a universal cleaning agent for cleaning the cartridge filter element of the cartridge filter as described in any one of claims 1-2;
(2) Erecting a cleaning system: sequentially connecting a security filter, a solid-liquid separator, a medicament tank and a forced circulation pump, wherein an outlet of the forced circulation pump is connected with an inlet of the security filter to form a closed loop structure, and a sludge discharge port of the solid-liquid separator is connected to a pit;
(3) Circularly cleaning the filter element: and adding a cleaning agent into the medicament tank, starting the forced circulation pump to enable the cleaning agent to circulate among the cartridge filter, the solid-liquid separator and the medicament tank, and regularly discharging sludge through a sludge discharge port of the solid-liquid separator.
4. The on-line cleaning process for cartridge filter elements according to claim 3, wherein the on-line cleaning process for cartridge filter elements further comprises: and inspecting and recording the flux recovery condition, the operation pressure difference condition and the cleaning period condition of the cartridge filter, and judging the effect of the cleaning process.
5. The on-line cleaning process for the cartridge filter element of the cartridge filter as recited in claim 3, wherein the cleaning agent tank and the hydrochloric acid tank are both connected with the medicament tank for adding the cleaning agent or the hydrochloric acid into the medicament tank.
6. The on-line cleaning process for the cartridge filter element of the cartridge filter according to claim 3, characterized in that sludge discharge is carried out for 2-3min every 20-40min of forced circulation, preferably for 2min every 30min of forced circulation.
7. The on-line cleaning process for the cartridge filter element of the cartridge filter as claimed in claim 3, wherein when the pH of the cleaning agent is more than 5, the pH is reduced to below 4 by adding hydrochloric acid, and when the liquid level of the cleaning agent after operation is reduced to two thirds of the original liquid level, the cleaning agent is added.
8. The on-line cleaning process for cartridge filter elements of claim 3, wherein in the circulating cleaning process, the cleaning is stopped when the water inlet pressure of the cartridge filter is reduced to 0.1MPa, and water is drained.
9. The on-line cleaning process for cartridge filter elements according to claim 3, wherein the cartridge filter elements comprise cartridge filter elements causing pollution and blockage in the process of filtering recycled reclaimed water, surface water and mine water.
10. The on-line cleaning process for the cartridge filter element of the cartridge filter according to claim 4, wherein when the cleaning system is erected, all the pipelines are connected by screw threads, so that the pipelines can bear the operating pressure of 1.0MPa after being connected;
preferably, the solid-liquid separator comprises one of a conical settler, a continuous centrifuge, and a baffled settler.
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| CN202211344976.1A CN115895789A (en) | 2022-10-31 | 2022-10-31 | Universal cleaning agent for cleaning cartridge filter element of security filter and online cleaning process |
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| CN202211344976.1A CN115895789A (en) | 2022-10-31 | 2022-10-31 | Universal cleaning agent for cleaning cartridge filter element of security filter and online cleaning process |
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