Liquid type ceramic filter cleaning agent

Abstract

The invention relates to the technical field of cleaning agents, and discloses a liquid ceramic filter cleaning agent, which comprises the following components: 3% of a surfactant, 6.5% of a complexing agent, 9% of an oxidizing agent, 3% of a corrosion inhibitor, 5% of a scale inhibitor, 6% of a softener, 17.5% of a main agent, and 50% of water. Different types of substances in the cleaning agent play a synergistic role in the cleaning process, the cleaning effect is more excellent than that of a single agent, the average filtering efficiency of the ceramic filter plate can be effectively improved, meanwhile, the average service life of the ceramic filter plate is prolonged, the use amount of HF and a traditional cleaning agent HNO3 is reduced while the cleaning effect is improved, and the cleaning agent is suitable for industrial production. By adding the corrosion inhibitor with better dispersity, the harm to equipment is reduced, the potential safety hazard caused by chemical components of medicaments in the operation process of personnel is reduced, the cleaning agent does not need to be heated in the use process, and the cleaning agent has very good dissolution, complexation and oxidation effects on fine-grain metal ores and nonmetallic minerals.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning agents, in particular to a liquid type ceramic filter cleaning agent. Background Art

[0002] Ceramic filter is a device that uses microporous ceramic plates as filter media and applies the principle of capillary effect to achieve solid-liquid separation. When the capillary force in the micropores of the ceramic plate is greater than the pressure difference at both ends of the micropores, the micropores will remain filled with liquid and air will not pass through the micropores. When the filter plate is immersed in the slurry, in the absence of external force, the dehydration process begins with the help of the natural force generated by the capillary effect. The solid particles in the slurry accumulate on the surface of the filter plate to form a filter cake, thereby achieving the purpose of solid-liquid separation.

[0003] In actual industrial production, the micropores of ceramic filter plates are often clogged by fine minerals and organic matter, which affects the efficiency and shortens the service life. The filtration efficiency and service life of each ceramic plate depend on whether the filtered material is removed from the micropores of the ceramic plate to the maximum extent. After each filtration cycle, the ceramic plate is immediately cleaned by backwashing water to wash away the residual filter cake caused by the gap between the filter plate and the scraper and the fine particles in the micropores on the surface of the ceramic plate. After running for a period of time, the clogging of the micropores of the filter plate will become more and more serious. Long-term operation alone cannot squeeze the micropores on the surface of the filter ceramic plate with backwashing water. In order to restore its technical performance, the commonly used methods at home and abroad are: ultrasonic cleaning, chemical cleaning and the combination of the two. Ultrasonic cleaning is to use the bubbles generated by high-frequency vibration to produce "cavitation" to "bombard" the attachments on the surface of the ceramic filter plate, and use mechanical methods to cause them to fall off, so as to clean the surface of the filter plate, but it is difficult to clean the blockages inside the micropores of the ceramic plate; chemical cleaning mainly uses nitric acid to clean the ceramic filter plate. This type of cleaning method has a better effect, but it is corrosive to the equipment and can easily damage the equipment life.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The object of the present invention is to provide a liquid ceramic filter cleaning agent to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: comprising the following components:

[0007] Surfactant 3%, complexing agent 6.5%, oxidant 9%, corrosion inhibitor 3%, scale inhibitor 5%, softener 6%, main agent 17.5%, water 50%.

[0008] Preferably, the surfactant is composed of 1% sodium butylnaphthalenesulfonate and 2% sodium dodecylbenzenesulfonate.

[0009] Through the above technical solution, the two surfactants have excellent penetration and diffusion properties, and are resistant to acid, alkali, hard water, and inorganic salts. Adding a small amount of salt can greatly increase the penetration

[0010] Preferably, the complexing agent is composed of 3.5% H2C2O4 and 3% HEDP.

[0011] Through the above technical solution, when cleaning the ceramic filter plate, it can be complexed with insoluble components such as silicon, calcium, magnesium, etc., so that they are dissolved in water.

[0012] Preferably, the oxidant is composed of 34% HNO and 35% KNO.

[0013] Through the above technical solution, some metal ions can be oxidized to a high-valent state to form acid radicals that are more easily soluble in water.

[0014] Preferably, the corrosion inhibitor is: HEDP 3%.

[0015] The above technical solution can greatly delay the corrosion of HF on ceramic filter plates and equipment.

[0016] Preferably, the scale inhibitor is: 5% hydrolyzed polymaleic anhydride.

[0017] Through the above technical solution, the scale blockage formed in the pores of the ceramic filter plate under a long-term neutral environment during use can be effectively cleared.

[0018] Preferably, the main agent is composed of HF 7%, H2C2O4 3.5%, nitric acid 4%, and HAc 3%.

[0019] Through the above technical scheme, HF and HNO3 have good solubility for insoluble compounds and metal elements, and H2C2O4 and HAc also have certain solubility, and can synergize with HF and HNO3, so that the agent has a wide range of applicability.

[0020] Preferably, the softener is: 6% tridecyl mercaptan.

[0021] Through the above technical solution, the friction of the cleaning agent liquid on the inner wall of the transport pipeline can be reduced, the overall viscosity can be reduced, and the cleaning agent surface can be made smoother.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] Through the synergistic effect between the different types of substances contained in the cleaning process, the cleaning effect is better than that of a single agent. It can not only effectively improve the average filtration efficiency of the ceramic filter plate, but also extend the average service life of the ceramic filter plate. While improving the cleaning effect, it reduces the amount of HF and traditional cleaning agent HNO3, adds corrosion inhibitors with good dispersibility, reduces damage to equipment, and reduces safety risks caused by the chemical composition of the agent during personnel operation. The components take into account both cleaning ability and equipment friendliness. The cleaning agent does not need to be heated during use. It has good dissolution, complexation and oxidation effects on fine-grained metal ores and non-metallic minerals, which can effectively improve the filtration efficiency of the ceramic filter plate and extend the service life of the ceramic filter plate. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] The present invention provides a technical solution: the cleaning agent is composed of the following types of raw materials: a surfactant, a complexing agent, an oxidant, a corrosion inhibitor, a scale inhibitor, a softener, a main agent and water;

[0026] The mass percentages of the raw materials are as follows: 1% sodium butylnaphthalene sulfonate, 2% sodium dodecyl sulfonate; 3% HAc, 6% HEDP (C2H8O7P2), 5% KNO3, 7% HF, 7% H2C2O4, 8% HNO3, 5% hydrolyzed polymaleic anhydride, 6% tridecyl mercaptan, and 50% water;

[0027] The surfactants of this cleaning agent are sodium butylnaphthalene sulfonate and sodium dodecyl sulfonate. The surfactants have excellent penetration and diffusion properties and are resistant to acids, alkalis, hard water, and inorganic salts. Adding a small amount of table salt can greatly increase the penetration power, and when cleaning the ceramic filter plate, the diffusion and permeability of the remaining effective ingredients can be improved, thereby improving the cleaning ability.

[0028] The complexing agents of the cleaning agent are mainly H2C2O4 and HEDP (ethane-1-hydroxy-1,1-diphosphoric acid). When cleaning the ceramic filter plate, it can complex with the ions of insoluble salts such as Si, Ca, and Mg to make them dissolve in water.

[0029] The oxidants of this cleaning agent are HNO3 and KNO3. Nitrate can oxidize some ions to a high-valent state under acidic conditions, and the dissolution equilibrium of the insoluble salt moves positively, increasing its solubility in water.

[0030] The corrosion inhibitor of this cleaning agent is HEDP, which can greatly delay the corrosion of HF on ceramic filter plates and equipment, and extend the service life of ceramic filter plates and equipment.

[0031] The scale inhibitor of this cleaning agent is hydrolyzed polymaleic anhydride, which can effectively clear the pores of the ceramic filter plate and eliminate scale blockages formed over the years in a long-term neutral or slightly alkaline environment.

[0032] The softener of the cleaning agent is tridecyl mercaptan, which can reduce the friction of the cleaning agent liquid on the inner wall of the transportation pipeline, reduce the overall viscosity of the cleaning agent liquid, and make the cleaning agent surface smoother.

[0033] The main agents of the cleaning agent are HF, H2C2O4, HNO3 and HAc. Among them, HF and HNO3 have good solubility for insoluble compounds and metal elements, and H2C2O4 and HAc also have certain solubility. They work synergistically with HF and HNO3 under acidic conditions, making the agent widely applicable.

[0034] During use, the cleaning agent of the present invention can be diluted by adding water according to the usage situation, and the concentration ratio can be flexibly adjusted according to the actual cleaning times and time in production, so it is convenient to use.

[0035] The components of the cleaning agent of the present invention can dissolve and complex fine-grained metal minerals at room temperature, thereby increasing the solubility of the complex in water and avoiding the energy consumption required in the dissolution process.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid ceramic filter cleaning agent, comprising the following components: Surfactant 3%, complexing agent 6.5%, oxidant 9%, corrosion inhibitor 3%, scale inhibitor 5%, softener 6%, main agent 17.5%, water 50%.

2. The liquid ceramic filter cleaning agent according to claim 1, characterized in that: The surfactant is composed of 1% sodium butylnaphthalene sulfonate and 2% sodium dodecylbenzene sulfonate.

3. The liquid ceramic filter cleaning agent according to claim 1, characterized in that: The complexing agent is composed of 3.5% H2C2O4 and 3% HEDP.

4. The liquid ceramic filter cleaning agent according to claim 1, characterized in that: The oxidant is composed of 34% HNO and 35% KNO.

5. The liquid ceramic filter cleaning agent according to claim 1, characterized in that: The corrosion inhibitor is: HEDP 3%.

6. The liquid ceramic filter cleaning agent according to claim 1, characterized in that: The scale inhibitor is: 5% hydrolyzed polymaleic anhydride.

7. The liquid ceramic filter cleaning agent according to claim 1, characterized in that: The main agent is composed of HF 7%, H2C2O4 3.5%, nitric acid 4% and HAc 3%.

8. The liquid ceramic filter cleaning agent according to claim 1, characterized in that: The softener is: 6% tridecyl mercaptan.