CN115746965B - Environment-friendly cleaning agent for ceramic filter plates and cleaning process thereof - Google Patents
Environment-friendly cleaning agent for ceramic filter plates and cleaning process thereof Download PDFInfo
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Abstract
The invention relates to the field of cleaning agents, in particular to an environment-friendly cleaning agent for a ceramic filter plate and a cleaning process thereof. The process provided by the invention has the advantages of reasonable design, proper component proportion, stable chemical property, excellent cleaning effect, no pungent smell, no harm to human bodies, no corrosion to ceramic filter plates and stainless steel, capability of completely replacing nitric acid for cleaning, and high practicability.
Description
Technical Field
The invention relates to the field of cleaning agents, in particular to an environment-friendly cleaning agent for a ceramic filter plate and a cleaning process thereof.
Background
The ceramic filter plate is a core component part of the ceramic filter, is mainly suitable for industrial solid-liquid separation and material dehydration, is widely applied to a plurality of industries such as mines, coal, papermaking, pharmacy, environmental protection and the like, and is generally continuously operated for 6-8 hours in the use process of the ceramic filter, so that the ceramic filter plate is required to be cleaned regularly in actual use so as to ensure the filtration efficiency of the ceramic filter.
At present, concentrated nitric acid is generally adopted to clean ceramic filter plates, nitric acid is used for dissolving and dredging plugs in micropores of the ceramic filter plates, but nitric acid belongs to a tube product which is easy to prepare, has relatively unstable performance, can be decomposed when meeting light or heat, and can be subjected to violent reaction and explosion with combustible substances and reducing substances, so that the nitric acid has relatively high risks in links such as purchase, transportation, use and storage, and the like, and is a strong acid which is easy to volatilize and has corrosiveness, and the gas or the contact with skin can cause great harm to the health, and the special requirements of waste liquid treatment cannot be met, so that the development of an aqueous cleaning agent with relatively high cleaning efficiency and environment friendliness is urgently needed.
Based on the situation, the application discloses an environment-friendly cleaning agent for a ceramic filter plate and a cleaning process thereof, so as to solve the technical problem.
Disclosure of Invention
The invention aims to provide an environment-friendly cleaning agent for a ceramic filter plate and a cleaning process thereof, which are used for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the preparation process of the environment-friendly cleaning agent for the ceramic filter plate comprises the following steps:
s1: uniformly mixing citric acid, hydroxyethylidene diphosphate, a surfactant, isomeric alcohol ether, sulfamic acid, a corrosion inhibition composition and water to obtain a solution A;
s2: mixing citric acid, hydroxyethylidene diphosphate, surfactant, hydroxy polyaspartic acid and water uniformly to obtain solution B;
s3: mixing the solution A and the solution B according to the mass ratio of 2:1, compounding to obtain the environment-friendly cleaning agent.
In the more optimized scheme, in the step S1, the content of each component of the solution A is as follows: the corrosion inhibitor comprises, by mass, 4-6% of citric acid, 5-7% of hydroxyethylidene diphosphate, 10-12% of a surfactant, 8-10% of isomeric alcohol ether, 1-2% of sulfamic acid, 1-2% of a corrosion inhibition composition and the balance of water.
In the more optimized scheme, in the step S2, the content of each component of the liquid B is as follows: 4-6% of citric acid, 5-7% of hydroxyethylidene diphosphate, 10-12% of surfactant, 4-6% of hydroxy polyaspartic acid and the balance of water.
In a more optimized scheme, the surfactant is polyethylene glycol; the isomeric alcohol ether is isomeric tridecanol ether.
In a more optimized scheme, in the step S1, the preparation steps of the corrosion inhibition composition are as follows: and (3) taking polysuccinimide and N, N-dimethylformamide, performing ultrasonic dispersion, heating to 60-65 ℃, adding a corrosion inhibitor and alkylamine, performing heat preservation reaction for 10-12 h, adding 2-amino-2-methyl-1, 3-propanediol, continuously performing reaction for 10-12 h, cooling after the reaction, precipitating, collecting a product, and performing vacuum drying to obtain the corrosion inhibition composition.
In an optimized scheme, the corrosion inhibitor is compounded by 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, and the molar ratio of the 2-aminobenzimidazole to the N- (3-aminopropyl) imidazole is 1:1, a step of; the alkylamine is one or more of dodecyl amine, tetramine and n-octylamine; the molar ratio of polysuccinimide, corrosion inhibitor, alkylamine and 2-amino-2-methyl-1, 3-propanediol is 6:3:2:1.
in a more optimized scheme, in the step S2, the preparation steps of the hydroxy polyaspartic acid are as follows: mixing polysuccinimide and deionized water, stirring uniformly, heating to 60-65 ℃ in a water bath, adding 2-amino-2-methyl-1, 3-propanediol, reacting for 20-24 hours in a heat preservation way, cooling after the reaction is finished, regulating the pH to be neutral by hydrochloric acid, precipitating by absolute ethyl alcohol to obtain suspension, and centrifuging to obtain hydroxy polyaspartic acid; the molar ratio of the polysuccinimide to the 2-amino-2-methyl-1, 3-propanediol is 5: (4-4.5).
According to the more optimized scheme, the environment-friendly cleaning agent is prepared by the preparation process of the environment-friendly cleaning agent for the ceramic filter plates.
The optimized scheme is that the cleaning process of the ceramic filter plate is adopted, and the cleaning agent comprises liquid A and liquid B; and the mass ratio of the solution A to the solution B is 2:1, a step of;
mixing the solution A with water to obtain a mixed solution A; mixing the solution B with water to obtain a mixed solution B; and (3) placing the ceramic filter plate in the mixed solution A for soaking and cleaning, soaking for 30-40 min at 30-50 ℃, adding the mixed solution B, continuously soaking for 30-40 min, taking out deionized water for flushing, and drying.
Compared with the optimized scheme, the ceramic filter plate is soaked and cleaned with the aid of ultrasonic dispersion, and the ultrasonic power is 16-24 KHz.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an environment-friendly cleaning agent for a ceramic filter plate and a cleaning process thereof, wherein the environment-friendly cleaning agent for the ceramic filter plate is developed by compounding components such as citric acid, hydroxyethylidene diphosphate, a surfactant, isomeric alcohol ether, sulfamic acid, a corrosion inhibition composition, hydroxy polyaspartic acid, deionized water and the like.
In the scheme, the surfactant is selected from polyethylene glycol, and the isomeric alcohol ether is isomeric tridecanol ether; the proposal also introduces a hydroxyl polyaspartic acid and corrosion-relieving composition, the Polyaspartic Acid (PASP) is a biodegradable polycarboxylic acid type high polymer biological material with strong chelating ability, and the Polyaspartic Acid (PASP) is introduced into the cleaning agent to chelate Ca-containing material 2+ 、Mg 2+ 、Fe 2+ The impurity of the water-based paint can realize the scale inhibition effect, avoid the secondary deposition of the cleaned stains and ensure the cleaning effect; therefore, in order to improve the chelating performance, the proposal carries out grafting modification on the polyaspartic acid, firstly, maleic anhydride and urea are utilized to react to generate polysuccinimide, and then the polysuccinimide reacts with amino in 2-amino-2-methyl-1, 3-propanediol to prepare a polyaspartic acid/2-amino-2-methyl-1, 3-propanediol graft (hydroxy polyaspartic acid), and the graft is introduced with double hydroxyl groups, so that the chelating performance is greatly improved, and the cleaning effect of the cleaning agent is also improved.
On the basis of the scheme, research and development personnel find that the small molecular 2-amino-2-methyl-1, 3-propanediol has a strong corrosion effect on metal materials such as copper, aluminum and the like, so that the corrosion inhibition performance of hydroxy polyaspartic acid is weakened, the scheme selects polyaspartic acid, a corrosion inhibitor and dodecylamine for reaction grafting, the corrosion inhibitor is prepared by compounding 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, on one hand, long-chain alkyl is introduced into the polyaspartic acid in the reaction, on the other hand, the amino of the corrosion inhibitor is utilized for grafting the corrosion inhibitor onto the polyaspartic acid, so that a corrosion inhibition composition is obtained, the corrosion inhibition composition has excellent corrosion inhibition performance, can protect ceramic filter plates from corrosion in the cleaning process, simultaneously, the blockage of corrosion products on filter holes is avoided, and the cleaning effect of the whole cleaning agent is excellent.
On the basis of the scheme, due to the existence of the hydroxy polyaspartic acid and the corrosion inhibition composition, during cleaning, 4% of citric acid, 5% of hydroxy ethylidene diphosphate, 12% of surfactant, 10% of isomeric alcohol ether, 2% of sulfamic acid, 2% of corrosion inhibition composition and 65% of water are firstly utilized to prepare solution A, the corrosion inhibition composition is introduced into the solution A, and the surface corrosion inhibition is realized while the ceramic filter plate is cleaned; after the ceramic filter plate is cleaned for a period of time, adding a solution B, wherein the solution B comprises 6% of citric acid, 7% of hydroxyethylidene diphosphate, 12% of surfactant, 5% of hydroxy polyaspartic acid and 70% of water, and the citric acid and the hydroxyethylidene diphosphate in the solution B are higher than those in the solution A, so that the corrosion influence on the ceramic filter plate and stainless steel can be reduced while the cleaning effect is ensured, and the overall cleaning effect is more excellent.
The invention discloses an environment-friendly cleaning agent for a ceramic filter plate and a cleaning process thereof, which are reasonable in process design and proper in component proportion, the prepared cleaning agent is stable in chemical property, has an excellent cleaning effect, is free of pungent smell and harm to human bodies, is free of corrosion to the ceramic filter plate and stainless steel, can completely replace nitric acid for cleaning, and has high practicability.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a ceramic filter plate after cleaning by the cleaning agent prepared in example 3 of the present invention;
FIG. 2 is a schematic diagram II of a ceramic filter plate cleaned by the cleaning agent prepared in example 3 of the present invention;
FIG. 3 is a schematic view showing the hanging effect of the ceramic filter after the cleaning agent prepared in example 3 of the present invention is cleaned.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The surfactant is polyethylene glycol (CAS: 25322-68-3), model Y0001684, available from Sigma Aldrich trade Co., ltd; the isomeric alcohol ether is isomeric tridecanol ether (CAS: 69011-36-5), the model is e-1303, and is purchased from Nantong Chen wetting chemical Co., ltd; citric acid (CAS: 77-92-9), available from Sigma Aldrich (Shanghai) trade Co., ltd; hydroxy ethylidene diphosphate (CAS: 2809-21-4), model 1227181942, available from Shanghai Jia Deer chemical technology Co., ltd; sulfamic acid (CAS: 5329-14-6), model 86040, available from Sigma Aldrich trade Co., ltd; maleic anhydride, urea, dodecyl amine, 2-amino-2-methyl-1, 3-propanediol, 2-aminobenzimidazole were all purchased from sigma aldrich (Shanghai) trade company; n- (3-aminopropyl) imidazole was purchased from Hubei's real chemical Co., ltd.
Example 1:
the preparation process of the environment-friendly cleaning agent for the ceramic filter plate is characterized by comprising the following steps of: the method comprises the following steps:
(1) Mixing 100g of maleic anhydride and 100mL of deionized water, stirring at 60 ℃ in an oil bath until the mixture is dissolved, adding 43g of urea, continuously stirring for 30min, heating to 170 ℃, adding 10mL of acid mixture, reacting for 3h under heat preservation, cooling, vacuum filtering, washing with deionized water, and vacuum drying at 50 ℃ to obtain polysuccinimide. The acid mixed solution is sulfuric acid and phosphoric acid mixed solution, and the volume ratio is 1:1.
(2) Preparation of the corrosion inhibition composition: and (3) dispersing 20g of polysuccinimide and 100mL of N, N-dimethylformamide for 20min by ultrasonic, heating to 60 ℃, adding a corrosion inhibitor and dodecylamine, carrying out heat preservation reaction for 12h, adding 2-amino-2-methyl-1, 3-propanediol, continuing the reaction for 12h, cooling after the reaction, precipitating, collecting a product, and carrying out vacuum drying to obtain the corrosion inhibition composition. The molar ratio of polysuccinimide to corrosion inhibitor to dodecyl amine to 2-amino-2-methyl-1, 3-propanediol is 6:3:2:1. the corrosion inhibitor is prepared by compounding 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, and the molar ratio of the 2-aminobenzimidazole to the N- (3-aminopropyl) imidazole is 1:1.
preparation of hydroxy polyaspartic acid: mixing 20g of polysuccinimide with 100mL of deionized water, stirring for 20min, heating to 60 ℃ in a water bath, adding 2-amino-2-methyl-1, 3-propanediol, reacting for 24h in a heat preservation way, cooling after the reaction is finished, adjusting the pH to be neutral by hydrochloric acid, precipitating by absolute ethyl alcohol to obtain suspension, and centrifuging to obtain hydroxy polyaspartic acid; the molar ratio of the polysuccinimide to the 2-amino-2-methyl-1, 3-propanediol is 5:4.
(3) Preparing a cleaning solution:
s1: uniformly mixing 4kg of citric acid, 5kg of hydroxyethylidene diphosphate, 12kg of surfactant, 10kg of isomeric alcohol ether, 2kg of sulfamic acid, 2kg of corrosion inhibition composition and 65kg of water to obtain solution A;
s2: mixing 6kg of citric acid, 7kg of hydroxyethylidene diphosphate, 12kg of surfactant, 5kg of hydroxypolyaspartic acid and 70kg of water uniformly to obtain solution B;
s3: and (3) compounding the solution A and the solution B to obtain the environment-friendly cleaning agent.
Example 2:
the preparation process of the environment-friendly cleaning agent for the ceramic filter plate is characterized by comprising the following steps of: the method comprises the following steps:
(1) Mixing 100g of maleic anhydride and 100mL of deionized water, stirring in an oil bath at 65 ℃ until the mixture is dissolved, adding 43g of urea, continuously stirring for 25min, heating to 180 ℃, adding 10mL of acid mixture, reacting for 2.5h under heat preservation, cooling, vacuum-filtering, washing with deionized water, and vacuum-drying at 55 ℃ to obtain polysuccinimide. The acid mixed solution is sulfuric acid and phosphoric acid mixed solution, and the volume ratio is 1:1.
(2) Preparation of the corrosion inhibition composition: and (3) dispersing 20g of polysuccinimide and 100mL of N, N-dimethylformamide for 25min by ultrasonic, heating to 65 ℃, adding a corrosion inhibitor and dodecylamine, reacting for 10h by heat preservation, adding 2-amino-2-methyl-1, 3-propanediol, continuing to react for 10h, cooling after the reaction, precipitating, collecting a product, and vacuum drying to obtain the corrosion inhibition composition. The molar ratio of polysuccinimide to corrosion inhibitor to dodecyl amine to 2-amino-2-methyl-1, 3-propanediol is 6:3:2:1. the corrosion inhibitor is prepared by compounding 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, and the molar ratio of the 2-aminobenzimidazole to the N- (3-aminopropyl) imidazole is 1:1.
preparation of hydroxy polyaspartic acid: mixing 20g of polysuccinimide with 100mL of deionized water, stirring for 25min, heating to 65 ℃ in a water bath, adding 2-amino-2-methyl-1, 3-propanediol, reacting for 22h in a heat preservation mode, cooling after the reaction is finished, adjusting pH to be neutral by hydrochloric acid, precipitating by absolute ethyl alcohol to obtain suspension, and centrifuging to obtain hydroxy polyaspartic acid; the molar ratio of the polysuccinimide to the 2-amino-2-methyl-1, 3-propanediol is 5:4.
(3) Preparing a cleaning solution:
s1: uniformly mixing 4kg of citric acid, 5kg of hydroxyethylidene diphosphate, 12kg of surfactant, 10kg of isomeric alcohol ether, 2kg of sulfamic acid, 2kg of corrosion inhibition composition and 65kg of water to obtain solution A;
s2: mixing 6kg of citric acid, 7kg of hydroxyethylidene diphosphate, 12kg of surfactant, 5kg of hydroxypolyaspartic acid and 70kg of water uniformly to obtain solution B;
s3: and (3) compounding the solution A and the solution B to obtain the environment-friendly cleaning agent.
Example 3:
the preparation process of the environment-friendly cleaning agent for the ceramic filter plate is characterized by comprising the following steps of: the method comprises the following steps:
(1) Mixing 100g of maleic anhydride and 100mL of deionized water, stirring in an oil bath at 65 ℃ until the mixture is dissolved, adding 43g of urea, continuously stirring for 20min, heating to 190 ℃, adding 10mL of acid mixture, reacting for 2h under heat preservation, cooling, vacuum filtering, washing with deionized water, and vacuum drying at 60 ℃ to obtain polysuccinimide. The acid mixed solution is sulfuric acid and phosphoric acid mixed solution, and the volume ratio is 1:1.
(2) Preparation of the corrosion inhibition composition: and (3) dispersing 20g of polysuccinimide and 100mL of N, N-dimethylformamide for 30min by ultrasonic, heating to 65 ℃, adding a corrosion inhibitor and dodecylamine, carrying out heat preservation reaction for 11h, adding 2-amino-2-methyl-1, 3-propanediol, continuing to react for 12h, cooling after the reaction, precipitating, collecting a product, and carrying out vacuum drying to obtain the corrosion inhibition composition. The molar ratio of polysuccinimide to corrosion inhibitor to dodecyl amine to 2-amino-2-methyl-1, 3-propanediol is 6:3:2:1. the corrosion inhibitor is prepared by compounding 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, and the molar ratio of the 2-aminobenzimidazole to the N- (3-aminopropyl) imidazole is 1:1.
preparation of hydroxy polyaspartic acid: mixing 20g of polysuccinimide with 100mL of deionized water, stirring for 30min, heating to 65 ℃ in a water bath, adding 2-amino-2-methyl-1, 3-propanediol, reacting for 24h in a heat preservation way, cooling after the reaction is finished, adjusting the pH to be neutral by hydrochloric acid, precipitating by absolute ethyl alcohol to obtain suspension, and centrifuging to obtain hydroxy polyaspartic acid; the molar ratio of the polysuccinimide to the 2-amino-2-methyl-1, 3-propanediol is 5:4.
(3) Preparing a cleaning solution:
s1: uniformly mixing 4kg of citric acid, 5kg of hydroxyethylidene diphosphate, 12kg of surfactant, 10kg of isomeric alcohol ether, 2kg of sulfamic acid, 2kg of corrosion inhibition composition and 65kg of water to obtain solution A;
s2: mixing 6kg of citric acid, 7kg of hydroxyethylidene diphosphate, 12kg of surfactant, 5kg of hydroxypolyaspartic acid and 70kg of water uniformly to obtain solution B;
s3: and (3) compounding the solution A and the solution B to obtain the environment-friendly cleaning agent.
Comparative example 1: comparative example 1 was modified on the basis of example 3, and in comparative example 1, the cleaning agent was directly prepared by compounding without adjusting to liquid A and liquid B, and the remaining steps were unchanged.
The specific adjustment steps are as follows: (3) preparation of cleaning liquid:
and (3) uniformly mixing 6kg of citric acid, 7kg of hydroxyethylidene diphosphate, 12kg of surfactant, 10kg of isomeric alcohol ether, 2kg of sulfamic acid, 2kg of corrosion inhibition composition, 5kg of hydroxy polyaspartic acid and 56kg of deionized water to obtain the environment-friendly cleaning agent.
Comparative example 2: comparative example 2 was modified on the basis of example 3, no hydroxypolyaspartic acid was added in comparative example 2, and the rest of the procedure was unchanged.
The preparation process of the environment-friendly cleaning agent for the ceramic filter plate is characterized by comprising the following steps of: the method comprises the following steps:
(1) Mixing 100g of maleic anhydride and 100mL of deionized water, stirring in an oil bath at 65 ℃ until the mixture is dissolved, adding 43g of urea, continuously stirring for 20min, heating to 190 ℃, adding 10mL of acid mixture, reacting for 2h under heat preservation, cooling, vacuum filtering, washing with deionized water, and vacuum drying at 60 ℃ to obtain polysuccinimide. The acid mixed solution is sulfuric acid and phosphoric acid mixed solution, and the volume ratio is 1:1.
(2) Preparation of the corrosion inhibition composition: and (3) dispersing 20g of polysuccinimide and 100mL of N, N-dimethylformamide for 30min by ultrasonic, heating to 65 ℃, adding a corrosion inhibitor and dodecylamine, carrying out heat preservation reaction for 11h, adding 2-amino-2-methyl-1, 3-propanediol, continuing to react for 12h, cooling after the reaction, precipitating, collecting a product, and carrying out vacuum drying to obtain the corrosion inhibition composition. The molar ratio of polysuccinimide to corrosion inhibitor to dodecyl amine to 2-amino-2-methyl-1, 3-propanediol is 6:3:2:1. the corrosion inhibitor is prepared by compounding 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, and the molar ratio of the 2-aminobenzimidazole to the N- (3-aminopropyl) imidazole is 1:1.
(3) Preparing a cleaning solution:
s1: uniformly mixing 4kg of citric acid, 5kg of hydroxyethylidene diphosphate, 12kg of surfactant, 10kg of isomeric alcohol ether, 2kg of sulfamic acid, 2kg of corrosion inhibition composition and 65kg of water to obtain solution A;
s2: taking and uniformly mixing 6kg of citric acid, 7kg of hydroxyethylidene diphosphate, 12kg of surfactant and 75% of water to obtain a solution B;
s3: and (3) compounding the solution A and the solution B to obtain the environment-friendly cleaning agent.
Comparative example 3: comparative example 3 the improvement was made on the basis of example 3, with the corrosion inhibitor added directly in comparative example 3, the remaining steps being unchanged.
The preparation process of the environment-friendly cleaning agent for the ceramic filter plate is characterized by comprising the following steps of: the method comprises the following steps:
(1) Mixing 100g of maleic anhydride and 100mL of deionized water, stirring in an oil bath at 65 ℃ until the mixture is dissolved, adding 43g of urea, continuously stirring for 20min, heating to 190 ℃, adding 10mL of acid mixture, reacting for 2h under heat preservation, cooling, vacuum filtering, washing with deionized water, and vacuum drying at 60 ℃ to obtain polysuccinimide. The acid mixed solution is sulfuric acid and phosphoric acid mixed solution, and the volume ratio is 1:1.
(2) Preparation of hydroxy polyaspartic acid: mixing 20g of polysuccinimide with 100mL of deionized water, stirring for 30min, heating to 65 ℃ in a water bath, adding 2-amino-2-methyl-1, 3-propanediol, reacting for 24h in a heat preservation way, cooling after the reaction is finished, adjusting the pH to be neutral by hydrochloric acid, precipitating by absolute ethyl alcohol to obtain suspension, and centrifuging to obtain hydroxy polyaspartic acid; the molar ratio of the polysuccinimide to the 2-amino-2-methyl-1, 3-propanediol is 5:4.
(3) Preparing a cleaning solution:
s1: uniformly mixing 4kg of citric acid, 5kg of hydroxyethylidene diphosphate, 12kg of surfactant, 10kg of isomeric alcohol ether, 2kg of sulfamic acid, 2kg of corrosion inhibitor and 65kg of water to obtain solution A; the corrosion inhibitor is prepared by compounding 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, and the molar ratio of the 2-aminobenzimidazole to the N- (3-aminopropyl) imidazole is 1:1.
s2: mixing 6kg of citric acid, 7kg of hydroxyethylidene diphosphate, 12kg of surfactant, 5kg of hydroxypolyaspartic acid and 70kg of water uniformly to obtain solution B;
s3: and (3) compounding the solution A and the solution B to obtain the environment-friendly cleaning agent.
Cleaning process example:
the cleaning process of the ceramic filter plate is characterized in that cleaning agents prepared in examples 1-3 and comparative examples 1-3 are taken, the cleaning agents comprise liquid A and liquid B, and the mass ratio of the liquid A to the liquid B is 2:1 are compounded for use. Mixing the solution A with water to obtain a mixed solution A; mixing the solution B with water to obtain a mixed solution B; wherein the mass ratio of the solution A to the water is 1:1.5; the mass ratio of the solution B to the water is 1:1.5.
and (3) placing the ceramic filter plate in the mixed solution A for soaking and cleaning, soaking for 30min at 35 ℃, adding the mixed solution B, continuously soaking for 30min, taking out deionized water for washing, and drying.
Wherein, when the cleaning agent prepared in the comparative example 1 is used for cleaning, the cleaning agent is directly mixed with water according to the mass ratio of 1:1.5, placing the ceramic filter plate in a cleaning agent for cleaning for 60min.
Detection experiment:
1. the cleaning agent prepared in example 1 was taken and sent as a sample to general standard technical service (SGS) for european union RoHS instruction test, and the test results showed that the cadmium, lead, mercury, polybrominated diphenyl (PBBs), polybrominated diphenyl ether (PDBEs), phthalate esters (such as dibutyl phthalate (DBP), butyl Benzyl Phthalate (BBP), di (2-ethylhexyl) phthalate (DEHP) and diisobutyl phthalate (DIBP) of the cleaning agent meet the limit requirements of the correction instruction (EU) 2015/863 of european union RoHS instruction 2011/65/EU appendix ii.
2. According to the method disclosed in example 4, the cleaning agents prepared in examples 1 to 3 and comparative examples 1 to 3 are adopted, and the ceramic filter plates in the same batch are cleaned, wherein the detection method specifically comprises the following steps: iron concentrate ore pulp of Xinjiang iron and steel ya Man Su mining limited responsibility company is added with xanthate, pine oil and sulfuric acid during ore dressing, and the granularity of the ore pulp is-400 meshes and accounts for 70%. And filtering the iron concentrate by adopting the same ceramic filter, stopping filtering when the filtering efficiency is 35%, replacing a new ceramic filter plate, cleaning the replaced ceramic filter plates in the same batch by using a cleaning agent, and detecting the filtering efficiency of the cleaned ceramic filter plates.
Service life is as follows: the filter plate after cleaning needs to be discarded when the filtering effect is less than 30% of that of a new filter plate, and the service time of the filter plate is recorded.
3. According to the method disclosed in the step 2, the replaced ceramic filter plate is cleaned, and the surface of the ceramic filter plate is observed after cleaning, wherein the surface of the ceramic filter plate is cleaned after cleaning according to the cleaning agents prepared in the steps 1-3, and no obvious corrosion condition exists on the surface; after the cleaning agent of comparative example 1 and comparative example 3 is adopted for cleaning, part of the surfaces of the ceramic filter plate and the stainless steel of the filter are slightly corroded, but the use of the ceramic filter plate and the stainless steel of the filter is not affected.
Specifically, the ceramic filter plate is cleaned by adopting the cleaning agent prepared in the embodiment 3, and the cleaned ceramic filter plate is shown in the following figures 1 and 2; the hanging effect of the filter after cleaning is shown in the following figure 3.
Conclusion: the invention discloses an environment-friendly cleaning agent for a ceramic filter plate and a cleaning process thereof, which are reasonable in process design and proper in component proportion, the prepared cleaning agent is stable in chemical property, has an excellent cleaning effect, is free of pungent smell and harm to human bodies, is free of corrosion to the ceramic filter plate and stainless steel, can completely replace nitric acid for cleaning, and has high practicability.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The preparation process of the environment-friendly cleaning agent for the ceramic filter plate is characterized by comprising the following steps of: the method comprises the following steps:
s1: uniformly mixing citric acid, hydroxyethylidene diphosphate, a surfactant, isomeric alcohol ether, sulfamic acid, a corrosion inhibition composition and water to obtain a solution A; the surfactant is polyethylene glycol; the isomeric alcohol ether is isomeric tridecanol ether;
the content of each component of the solution A is as follows: 4-6% of citric acid, 5-7% of hydroxyethylidene diphosphate, 10-12% of surfactant, 8-10% of isomeric alcohol ether, 1-2% of sulfamic acid, 1-2% of corrosion inhibition composition and the balance of water;
s2: mixing citric acid, hydroxyethylidene diphosphate, surfactant, hydroxy polyaspartic acid and water uniformly to obtain solution B;
the component contents of the solution B are as follows: 4-6% of citric acid, 5-7% of hydroxyethylidene diphosphate, 10-12% of surfactant, 4-6% of hydroxy polyaspartic acid and the balance of water;
s3: mixing the solution A and the solution B according to the mass ratio of 2:1, compounding to obtain an environment-friendly cleaning agent;
wherein the preparation steps of the corrosion inhibition composition are as follows: taking polysuccinimide and N, N-dimethylformamide, performing ultrasonic dispersion, heating to 60-65 ℃, adding a corrosion inhibitor and alkylamine, performing heat preservation reaction for 10-12 hours, then adding 2-amino-2-methyl-1, 3-propanediol, continuously performing reaction for 10-12 hours, cooling after the reaction, precipitating, collecting a product, and performing vacuum drying to obtain a corrosion inhibition composition;
the corrosion inhibitor is prepared by compounding 2-aminobenzimidazole and N- (3-aminopropyl) imidazole, and the molar ratio of the 2-aminobenzimidazole to the N- (3-aminopropyl) imidazole is 1:1, a step of; the alkylamine is one or more of dodecyl amine, tetramine and n-octylamine; the molar ratio of polysuccinimide, corrosion inhibitor, alkylamine and 2-amino-2-methyl-1, 3-propanediol is 6:3:2:1, a step of;
the preparation method of the hydroxy polyaspartic acid comprises the following steps: mixing polysuccinimide and deionized water, stirring uniformly, heating to 60-65 ℃ in a water bath, adding 2-amino-2-methyl-1, 3-propanediol, reacting for 20-24 hours in a heat preservation way, cooling after the reaction is finished, regulating the pH to be neutral by hydrochloric acid, precipitating by absolute ethyl alcohol to obtain suspension, and centrifuging to obtain hydroxy polyaspartic acid; the molar ratio of the polysuccinimide to the 2-amino-2-methyl-1, 3-propanediol is 5: (4-4.5).
2. An environmental-friendly cleaning agent for ceramic filter plates prepared by the preparation process according to claim 1.
3. A cleaning process for a ceramic filter plate is characterized by comprising the following steps of: taking a cleaning agent as claimed in claim 2, wherein the cleaning agent comprises a solution A and a solution B; and the mass ratio of the solution A to the solution B is 2:1, a step of;
mixing the solution A with water to obtain a mixed solution A; mixing the solution B with water to obtain a mixed solution B; and (3) placing the ceramic filter plate in the mixed solution A for soaking and cleaning, soaking for 30-40 min at 30-50 ℃, adding the mixed solution B, continuously soaking for 30-40 min, taking out deionized water for flushing, and drying.
4. A process for cleaning ceramic filter plates according to claim 3, wherein: the ceramic filter plate is soaked and cleaned to assist in ultrasonic dispersion, and the ultrasonic power is 16-24 KHz.
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