阅读说明：本技术 一种陶瓷过滤板清洗剂及其在陶瓷板过滤机清洗中的应用 (Ceramic filter plate cleaning agent and application thereof in cleaning ceramic plate filter ) 是由 倪潇 王兢 杨萍萍 倪志保 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种陶瓷过滤板清洗剂及其在陶瓷板过滤机清洗中的应用,该清洗剂由如下重量份的原料组成：水溶性无机固体酸式盐20份～90份、固体无机酸20份～90份、水溶性固体有机酸10份～90份、金属离子络合剂1份～5份、水质调整剂0份～5份和表面活性剂1份～5份。本发明的陶瓷过滤板清洗剂能够提高配置和使用上的安全性,并且兼顾环保、绿色等特性,最重要的是能够得到和硝酸一样的清洗效果。本发明的清洗剂为固体,安全性好,储运方便；本发明的清洗剂在配置过程中不放热,溶解速度快,无色无味；本发明的清洗剂能够得到与硝酸类似的清洗效果。本发明的清洗剂用来清洗的水酸性低,腐蚀性小,化学需氧量COD低,清洗水符合直接排放的标准。(The invention discloses a ceramic filter plate cleaning agent and application thereof in cleaning a ceramic filter plate, wherein the cleaning agent is prepared from the following raw materials in parts by weight: 20 to 90 parts of water-soluble inorganic solid acid salt, 20 to 90 parts of solid inorganic acid, 10 to 90 parts of water-soluble solid organic acid, 1 to 5 parts of metal ion complexing agent, 0 to 5 parts of water quality regulator and 1 to 5 parts of surfactant. The cleaning agent for the ceramic filter plate can improve the safety of configuration and use, has the characteristics of environmental protection, greenness and the like, and can obtain the same cleaning effect as nitric acid. The cleaning agent is solid, has good safety and is convenient to store and transport; the cleaning agent disclosed by the invention does not release heat in the preparation process, is high in dissolving speed, and is colorless and tasteless; the cleaning agent of the invention can obtain cleaning effect similar to nitric acid. The cleaning agent has low acidity of water for cleaning, small corrosivity and low Chemical Oxygen Demand (COD), and the cleaning water meets the standard of direct discharge.)

1. The cleaning agent for the ceramic filter plate is characterized in that: the ceramic filter plate cleaning agent is prepared from the following raw materials in parts by weight: 20 to 90 parts of water-soluble inorganic solid acid salt, 20 to 90 parts of solid inorganic acid, 10 to 90 parts of water-soluble solid organic acid, 1 to 5 parts of metal ion complexing agent, 0 to 5 parts of water quality regulator and 1 to 5 parts of surfactant.

2. The cleaning agent for ceramic filter plates according to claim 1, wherein: the ceramic filter plate cleaning agent is prepared from the following raw materials in parts by weight: 25 to 85 parts of water-soluble inorganic solid acid salt, 25 to 85 parts of solid inorganic acid, 15 to 80 parts of water-soluble solid organic acid, 2 to 3 parts of metal ion complexing agent, 0 to 3 parts of water quality regulator and 2 to 4 parts of surfactant.

3. The cleaning agent for ceramic filter plates according to claim 2, wherein: the ceramic filter plate cleaning agent is prepared from the following raw materials in parts by weight: 30 parts of water-soluble inorganic solid acid salt, 58 parts of solid inorganic acid, 10 parts of water-soluble solid organic acid, 0.5 part of metal ion complexing agent, 0.5 part of water quality regulator and 1 part of surfactant.

4. A ceramic filter plate cleaning agent according to claim 1, 2 or 3, wherein: the water-soluble inorganic solid acid salt is at least one of sodium hydrogen sulfate, sodium bicarbonate, disodium hydrogen phosphate and sodium dihydrogen phosphate.

5. A ceramic filter plate cleaning agent according to claim 1, 2 or 3, wherein: the solid inorganic acid is at least one of perchloric acid, sulfonic acid, trichloroacetic acid, chloroacetic acid and periodic acid.

6. A ceramic filter plate cleaning agent according to claim 1, 2 or 3, wherein: the water-soluble solid organic acid is at least one of acetic anhydride, oxalic acid, citric acid, succinic acid, maleic acid, tannic acid and maleic anhydride.

7. A ceramic filter plate cleaning agent according to claim 1, 2 or 3, wherein: the water quality regulator is at least one of sodium metabisulfite, sodium carbonate and sodium metaphosphate.

8. A ceramic filter plate cleaning agent according to claim 1, 2 or 3, wherein: the metal ion complexing agent is at least one of sodium ethylene diamine tetracetate, sodium hexametaphosphate, triethanolamine and tartaric acid.

9. A ceramic filter plate cleaning agent according to claim 1, 2 or 3, wherein: the surfactant is at least one of sorbitan monooleate, nonylphenol polyoxyethylene ether, fatty acid polyoxyethylene ether and sodium dodecyl benzene sulfonate.

10. Use of a ceramic filter plate cleaning agent according to claim 1, 2 or 3 in ceramic plate filter cleaning, characterized in that: the application of the ceramic filter plate cleaning agent in cleaning the ceramic plate filter specifically comprises the following steps:

(1) when cleaning the ceramic plate, firstly, mixing a solid ceramic filter plate cleaning agent with water, and preparing a cleaning agent solution with the mass concentration of 2-20% in a cleaning agent preparation tank;

(2) then, a cleaning agent solution is fed into a backwashing pipeline by a metering pump, the edges of the ceramic filter plate are cleaned by ultrasonic waves, and the ceramic filter plate is cleaned by the backwashing pipeline by the cleaning agent solution;

(3) and after cleaning for a period of time, closing the metering pump, and finally, washing with back flushing water for 8-15 minutes.

11. The use of the ceramic filter plate cleaning agent according to claim 10 in cleaning a ceramic plate filter, wherein: preparing a cleaning agent solution with the mass concentration of 5% in a cleaning agent preparation tank; and (4) cleaning for 60 minutes in the step (3), closing the metering pump, and finally flushing for 10 minutes by using backwashing water.

Technical Field

The invention belongs to the field of cleaning in mining production, and particularly relates to a formula of a cleaning agent for a ceramic filter plate and application of the cleaning agent in cleaning of a ceramic filter plate.

Background

The ceramic filter is a high-efficiency and energy-saving filtering device commonly used in mines, and is particularly widely applied to the processes needing filtering, such as flotation, magnetic separation and the like. The working principle of the ceramic filter is similar to that of the traditional vacuum filter, and the biggest difference is that the ceramic filter does not use permeable and permeable filter cloth, but adopts a microporous ceramic sheet as a filter medium, and maintains the vacuum degree almost without loss by utilizing the permeable and impermeable capillary phenomenon characteristics of the microporous ceramic sheet. The working area of the ceramic filter is divided into a slurry suction area, a drying area, a discharging area and a back washing area. When the ceramic filter starts to work, the filter plate is immersed in the slurry tank, concentrate particles suspended in the slurry tank are adsorbed on the filter plate under the action of vacuum, solid materials are intercepted on the filter plate, filtrate is circulated through the filter plate, and the surplus part is discharged; the filter plate leaves the slurry tank and enters a drying area, and the filter cake is continuously dehydrated under the action of vacuum; a scraper is arranged in the dried discharging area, and a filter cake is scraped; and after the unloading is finished, the filter plate enters a backwashing area, filtered water enters the filter plate through the distribution head, the filter plate is backwashed, and particles blocked on the micropores are washed off, so that a filtering cycle operation is formed.

As shown in figure 1, the cleaning system of the ceramic filter comprises a simple physical cleaning (back washing) device, a deep physical cleaning (ultrasonic) device and a chemical cleaning (pickling) device, and the three devices work in combination to ensure that micropores of the ceramic plate are smooth, keep the high-efficiency operation of the ceramic plate and prevent the reduction of the suction filtration effect of the ceramic plate in the periodic operation. A backwashing device: the back washing pipeline system consists of a regulating hand valve, a filter, a back washing pipeline and the like, and is used for washing the ceramic plates in the back washing area of each cycle from inside to outside so as to ensure that micropores of the ceramic plates are dredged in each cycle and work during driving and combined cleaning. An ultrasonic cleaning device: the ultrasonic cleaning equipment consists of an ultrasonic power supply and an ultrasonic transducer box. Mainly utilizes the cavitation of ultrasonic waves to clean the ceramic plate during mixed cleaning, and works during combined cleaning. Chemical cleaning (pickling) device: in the prior art, the ceramic filter is mainly cleaned by ultrasonic cleaning and is matched with nitric acid. The ultrasonic wave can wash out most of small particle concentrates from the micropores, and large particles can be clamped in the micropores and are only suitable for ultrasonic and difficult to clean. Nitric acid is strong acid, can dissolve most metal oxides, can reduce the particle size by adding nitric acid in the cleaning process, and can wash down more large particles by combining physical washing, thereby achieving more thorough cleaning effect. During combined cleaning, a back-flushing pipeline system is utilized, nitric acid with the concentration of about 50% is fed into a back-flushing pipeline through a metering pump, the nitric acid and back-flushing water are mixed into 0.5-1% acid liquid, each circulating filter plate is flushed from inside to outside, the calcium accumulation and blockage of the filter plate are eliminated, the service efficiency of the filter plate is guaranteed, and the combined cleaning work is carried out.

In the prior art, nitric acid and a small amount of oxalic acid are adopted for auxiliary soaking for the most part of chemical cleaning of the ceramic filter. The nitric acid with the concentration of 98% is generally purchased by a concentrating mill for storage, is sent into a backwashing pipeline through a section of sparse 50%, and is mixed with backwashing water into 0.5-1% acid liquid for cleaning. The amount of the nitric acid is about 100 g/(t) as the concentrate. With the increasing importance of the country on environmental protection, the nitric acid cleaning meets unprecedented pressure. According to actual production, nitric acid has great safety management hidden danger. 98 percent of nitric acid is commonly called fuming nitric acid, belongs to dangerous chemicals, is violently fuming in the air, and burns and safety accidents are frequent; acid mist corrodes equipment, pipelines and plants seriously; the storage requirement of the nitric acid is high, and special safe and environment-friendly facilities are needed; the nitric acid dilution process is difficult to operate, the heat release is fast, and the operation needs to be careful and slow. The evolution of nitrogen dioxide gas also presents a hazard to the occupational health of personnel. Because nitric acid has strong corrosivity, safety accidents frequently occur in the cleaning process, and meanwhile, the cleaning waste liquid causes pollution to the environment and corrosion to structures. Based on the above-mentioned defects in the prior art, how to find a new environment-friendly cleaning method is urgent.

Disclosure of Invention

The invention provides a ceramic filter plate cleaning agent and application thereof in cleaning a ceramic plate filter, aiming at overcoming the defects in the prior art.

The invention is realized by the following technical scheme: the invention discloses a cleaning agent for a ceramic filter plate, which comprises the following raw materials in parts by weight: 20 to 90 parts of water-soluble inorganic solid acid salt, 20 to 90 parts of solid inorganic acid, 10 to 90 parts of water-soluble solid organic acid, 1 to 5 parts of metal ion complexing agent, 0 to 5 parts of water quality regulator and 1 to 5 parts of surfactant.

As a preferred embodiment of the invention, the cleaning agent for the ceramic filter plate consists of the following raw materials in parts by weight: 25 to 85 parts of water-soluble inorganic solid acid salt, 25 to 85 parts of solid inorganic acid, 15 to 80 parts of water-soluble solid organic acid, 2 to 3 parts of metal ion complexing agent, 0 to 3 parts of water quality regulator and 2 to 4 parts of surfactant.

As the best mode of the invention, the cleaning agent for the ceramic filter plate consists of the following raw materials in parts by weight: 30 parts of water-soluble inorganic solid acid salt, 58 parts of solid inorganic acid, 10 parts of water-soluble solid organic acid, 0.5 part of metal ion complexing agent, 0.5 part of water quality regulator and 1 part of surfactant.

The water-soluble inorganic solid acid salt is at least one of sodium hydrogen sulfate, sodium hydrogen carbonate, disodium hydrogen phosphate and sodium dihydrogen phosphate. The solid inorganic acid is at least one of perchloric acid, sulfonic acid, trichloroacetic acid, chloroacetic acid and periodic acid. The water-soluble solid organic acid is at least one of acetic anhydride, oxalic acid, citric acid, succinic acid, maleic acid, tannic acid and maleic anhydride.

The metal ion complexing agent is at least one of sodium ethylene diamine tetracetate, sodium hexametaphosphate, triethanolamine and tartaric acid. The metal ion complexing agent has the main functions of complexing calcium and magnesium ions in water, and has the functions of improving the hardness of water and preventing scale from forming again.

The water quality regulator is at least one of sodium pyrosulfite, sodium carbonate and sodium metaphosphate.

The surfactant is at least one of sorbitan monooleate, polyoxyethylene nonyl phenyl ether, polyoxyethylene fatty acid ether and sodium dodecyl benzene sulfonate. The surfactant is used for promoting the cleaning liquid to enter the micropores and simultaneously washing off organic mining agents adhered to the ceramic plate filter, such as a collecting agent and a foaming agent in flotation, lubricating oil occasionally entering concentrate slurry and the like.

The formula of the cleaning agent for the ceramic filter plate does not contain other components except the components of water-soluble inorganic solid acid salt, solid inorganic acid, water-soluble solid organic acid, metal ion complexing agent and surfactant.

The invention also discloses the application of the cleaning agent for the ceramic filter plate in cleaning the ceramic filter plate, and the cleaning agent does not need to change most of the original cleaning process by using nitric acid, and only needs to change the original nitric acid diluting tank filled with nitric acid with the mass concentration of 50% into a preparation tank of the cleaning agent.

The application of the ceramic filter plate cleaning agent in cleaning the ceramic plate filter specifically comprises the following steps:

(1) when cleaning a ceramic plate, firstly, mixing a solid ceramic filter plate cleaning agent with water, and preparing a cleaning agent solution with the mass concentration of 2-20% in a cleaning agent preparation tank (an original 50% nitric acid dilution tank);

(2) then, a cleaning agent solution is fed into a backwashing pipeline by a metering pump, the edges of the ceramic filter plate are cleaned by ultrasonic waves, and the ceramic filter plate is cleaned by the backwashing pipeline by the cleaning agent solution;

(3) and after cleaning for a period of time, closing the metering pump, and finally, washing with back flushing water for 8-15 minutes.

As a preferred embodiment of the invention, step (1) is to prepare a cleaning agent solution with a mass concentration of 5% in a cleaning agent preparation tank; and (4) cleaning for 60 minutes in the step (3), closing the metering pump, and finally flushing for 10 minutes by using backwashing water.

The invention has the beneficial effects that: the invention aims to develop the research of nitric acid substitutes, finally obtains a novel environment-friendly cleaning agent formula through the analysis of the properties of a filter product and a filter plate, the molecular design of a cleaning agent, a cleaning test and the like, and provides a cleaning agent for a ceramic filter plate and application thereof in cleaning of the ceramic filter plate. The cleaning agent for the ceramic filter plate can improve the safety of configuration and use, has the characteristics of environmental protection, greenness and the like, and can obtain the same cleaning effect as nitric acid. Compared with the prior art, the cleaning agent for the ceramic filter plate has the following advantages: the cleaning agent is a solid cleaning agent, has good safety and is convenient to store and transport; the cleaning agent disclosed by the invention does not release heat in the preparation process, is high in dissolving speed, and is colorless and tasteless; the cleaning agent of the invention can obtain cleaning effect similar to nitric acid. The water cleaned by the cleaning agent has low acidity, small corrosivity and low Chemical Oxygen Demand (COD), and the cleaning water meets the standard of direct discharge.

Drawings

FIG. 1 is a diagram of a device for cleaning industrial test ceramic filters with raw nitric acid in the prior art.

FIG. 2 is a diagram of a cleaning apparatus for a ceramic filter for industrial tests using the cleaning agent of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings and specific examples.

Example 1: the cleaning agent for the ceramic filter plate comprises the following raw materials in parts by weight: 50 parts of sodium bisulfate, 10 parts of perchloric acid, 8 parts of succinic acid, 0.1 part of sodium ethylene diamine tetracetate and 0.1 part of sorbitan monooleate. The cleaning agent contains no further components in addition to the above-mentioned components.

As shown in figures 1 and 2, the invention also discloses the application of the cleaning agent for the ceramic filter plate in cleaning the ceramic plate filter, and the cleaning agent does not need to change most of the original cleaning process by using nitric acid, and only needs to modify the original nitric acid diluting tank filled with nitric acid with the mass concentration of 50% into the preparation tank of the cleaning agent. The application of the ceramic filter plate cleaning agent in cleaning the ceramic plate filter specifically comprises the following steps: (1) when the ceramic plate is cleaned, firstly, a cleaning agent of a solid ceramic filter plate is mixed with water, and a cleaning agent solution with the mass concentration of 5% is prepared in a cleaning agent preparation tank (an original 50% nitric acid dilution tank); (2) then, a cleaning agent solution is fed into a backwashing pipeline by a metering pump, the edges of the ceramic filter plate are cleaned by ultrasonic waves, and the ceramic filter plate is cleaned by the backwashing pipeline by the cleaning agent solution; (3) after 60 minutes of cleaning, the metering pump was turned off and finally flushed with backwash water for 10 minutes.

Example 2: the cleaning agent for the ceramic filter plate comprises the following raw materials in parts by weight: 55 parts of sodium dihydrogen phosphate, 5 parts of sulfonic acid, 10 parts of tannic acid, 1 part of sodium hexametaphosphate and 2 parts of nonylphenol polyoxyethylene ether.

Example 3: the ceramic filter is adopted in the dehydration process of iron ore concentrate produced by the concentrating mill of Shandong iron and steel sunshine company. The method is characterized in that nitric acid is always used for cleaning a filter plate of the ceramic filter, and the following formula of the cleaning agent for the ceramic filter plate is adopted: the cleaning agent is composed of the following raw materials in percentage by mass: 10% of sulfonic acid, 60% of disodium hydrogen phosphate, 28% of citric acid, 1% of sodium ethylene diamine tetracetate and 1% of sodium dodecyl sulfate. The formula of the cleaning agent can obtain the same cleaning effect as nitric acid, the dosage of the cleaning agent is low, the acidity of cleaning water is low, COD (chemical oxygen demand) is about 10mg/L, and the cleaning agent can be directly discharged, and the specific cleaning effect is detailed in table 1.

Table 1: and (5) industrial debugging of production indexes.

Example 4: in the Guangdong great treasure mountain mining industry, because substances such as thiourethane, black medicine, pinitol and the like are used in the flotation process, the filter plate needs to be cleaned by using ultrasonic and nitric acid after being used for 8 hours, and the filtering efficiency of the cleaned filter plate is 80 percent of that of a new filter plate. The cleaning agent for the ceramic filter plate is used for replacing nitric acid in the original flow, the cleaning agent is prepared into 5% aqueous solution, then ultrasonic and cleaning agent cleaning is carried out, and the filtering efficiency of the cleaned filter plate is 85% of that of a new filter plate.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.