CN109234024B

CN109234024B - Drinking water pipe cleaning agent, drinking water pipe cleaning method and drinking water pipe maintenance method

Info

Publication number: CN109234024B
Application number: CN201811352985.9A
Authority: CN
Inventors: 任国华; 蒋秀琦
Original assignee: Guangdong Shunde Sanyang Chemical Co ltd
Current assignee: Guangdong Shunde Sanyang Chemical Co ltd
Priority date: 2018-11-14
Filing date: 2018-11-14
Publication date: 2021-06-11
Anticipated expiration: 2038-11-14
Also published as: CN109234024A

Abstract

The invention provides a water pipe cleaning agent which comprises, by mass, 12-50 parts of natural organic acid, 10-50 parts of citric acid, 10-15 parts of natural surfactant, 10-15 parts of natural bactericide and 10-25 parts of water. The invention provides a water pipe cleaning agent which can effectively remove scale, rust and sludge and realize efficient sterilization through physical and chemical reactions of the cleaning agent and the scale, rust and sludge on the inner wall of a water pipe. The water pipe cleaning agent disclosed by the invention is made of edible materials, has no secondary pollution to a water pipe, and cannot cause other damages to a human body even if residues exist; and the cleaning process is simple and convenient, the cleaning equipment is simple and easy to obtain, the cost of the cleaning agent and the cleaning process is low, the acceptance degree is high, and the method is suitable for large-scale popularization and application and has wide development prospect.

Description

Drinking water pipe cleaning agent, drinking water pipe cleaning method and drinking water pipe maintenance method

Technical Field

The invention belongs to the technical field of heavy-duty anticorrosive coatings, and relates to a water pipe cleaning agent, a water pipe cleaning method and a water pipe maintenance method, in particular to a drinking water pipe cleaning agent, a drinking water pipe cleaning method and a drinking water pipe maintenance method.

Background

The water pipe is a water supply pipeline, and the water pipe is classified into three types, wherein the first type is a metal pipe, such as an inner-lined plastic hot-dip cast iron pipe, a copper pipe, a stainless steel pipe, an early galvanized pipe and the like, wherein the galvanized pipe is used as the water pipe, a large amount of rust scale is generated in the pipe after the galvanized pipe is used for several years, the flowing yellow water not only pollutes sanitary ware, but also is mixed with bacteria which are not smooth and bred on the inner wall, the heavy metal content in the water is too high due to the rust, and the health of a human body is seriously damaged, so that the water pipe is forbidden to be drunk in; the copper pipe has the advantages of corrosion resistance, bacteria elimination and the like, is a first-class product in the water pipe, but the copper pipe is expensive and the welding construction cost is higher, so that few welding type copper pipes are adopted in home decoration; the stainless steel pipe is safe, sanitary, healthy and durable, eliminates the problem of plastic pipeline pollution, saves more price than a copper pipe, and is the preferred metal water pipe material at present. The second type is plastic pipe, such as UPVC, PB, PP-R, PE-RT, PPH, PP-B, PEX, etc. The third type is plastic-clad metal pipes, such as plastic-clad steel pipes, aluminum-plastic composite pipes, outer layer welding type aluminum-plastic composite pipes, steel-plastic composite pipes, bimetal composite pipes and the like. Modern fitment water pipe all adopts the wall-buried formula construction, "hidden engineering" is a very important problem, not only the water pipe seepage will bring the consequence that is difficult to compensate with bursting, more importantly is the drinking water safety problem of water supply pipe. The quality determines the water quality, namely that the water quality is poor and the key is to look at pipelines, so that the sanitation performance, the product service life, the material strength, the corrosion resistance, the economic performance, the construction performance, the thermal expansion performance, the heat preservation performance, the environmental protection performance and the like of a water supply pipeline are important indexes for considering whether the water supply pipeline is qualified or not.

However, in China, the living and service life of each building is 70 years, the time span is large, each building is caused, the problems of complex structure, large situation diversity and the like exist at the present stage due to the limitation of the past materials, the water supply pipeline comprises various types such as cement pipes, cast iron pipes, steel pipes, galvanized pipes, PP, PE, aluminum-plastic composite pipes and the like, although the galvanized pipes and other materials are forbidden to be used as the water supply pipeline in China at present, the main body still comprises the cast iron pipes and the galvanized pipes before the 90 s and the 2010 s, the pipes are corroded after being used for a long time, and in addition, the water body can generate sludge in the conveying process, sand stones, oil stains, algae, bacteria and various heavy metals in the water are gradually accumulated and attached to the pipe walls of the water pipes, the harmful substances which are not seen but attached to the water pipes can be brought out along with the water flow at a little by little, the water for daily use, diet and washing water of people are gradually digested and absorbed by human bodies and the skin of people is touched and absorbed, so that the health of the human bodies is harmed.

In addition, the living standard of modern people is increasingly improved, the attention on drinking water is also increasingly paid, the requirements on the drinking water are not only on the water quantity and the water pressure, and the water quality safety is more concerned. Although some families now solve the problem of quoting water through the installation water purifier, but the water purifier is as end equipment, can't solve the dirty problem of water pipe, and the index is not permanent, no matter is the cost of the product cost of early stage and the filter consumptive material of later stage, all can the life cost of greatly increased family. At present, although some enterprises begin to use machines to clean the tap water pipes, the effect is not obvious, only sludge and partial scale can be removed, and rust and bacteria cannot be completely removed; it is also disclosed in the literature that the inner wall of the pipe is cleaned by physical vibration or ultrasonic wave, but this method still cannot remove firm rust and scale, cannot remove bacteria, and can damage the water pipe itself and the installation structure of the water pipe; it is also known that cleaning water pipes with inorganic acids such as hydrochloric acid and sulfuric acid is effective in removing rust and scale, but can seriously damage the water pipes themselves.

Therefore, how to find a more convenient and suitable method can solve the problem of potential safety hazards of water quality in the drinking water pipe and overcome the key problem of the last kilometer is one of the problems to be solved urgently in the industry and is also one of the key links for improving the civil guarantee.

Disclosure of Invention

In view of the above, the present invention provides a water pipe cleaning agent, a water pipe cleaning method, and a water pipe maintenance method, and particularly provides a drinking water pipe cleaning agent, a drinking water pipe cleaning method, and a drinking water pipe maintenance method. The water pipe cleaning agent provided by the invention can remove sludge and scale, rust and bacteria, and residual harmful heavy metals in the water pipe through chemical and physical changes, and the water pipe itself cannot be lost.

The invention provides a water pipe cleaning agent, which comprises the following components in percentage by mass:

preferably, the natural organic acid comprises one or more of citric acid, crataegolic acid, acetic acid, tartaric acid, vitamin C and ursolic acid;

the natural surfactant comprises one or more of orange oil, Chinese honeylocust fruit oil and cashew oil;

the natural bactericide comprises one or more of garlicin, epsilon-polylysine, ginger extract and tea oil;

the water pipe cleaning agent further comprises 3-10 parts by weight of a corn modified water absorbent.

Preferably, the water pipe cleaning agent can be used for cleaning one or more of a cement water pipe, a cast iron water pipe, a steel water pipe, a galvanized water pipe, a PP water pipe, a PE water pipe and an aluminum-plastic composite water pipe;

the water pipe comprises a tap water pipe.

The invention also provides a cleaning method of the water pipe, which comprises the following steps:

1) the water pipe cleaning agent and the water in any technical scheme are sent into a tap water pipeline from a house end, and then are kept stand and the cleaned sewage is discharged.

Preferably, the mass ratio of the water pipe cleaning agent to the water is 1: (1-15);

the service end is a tap water supply inlet of a user;

the house entering end is provided with a water inlet or a water inlet and a valve.

Preferably, the tap water pipeline comprises one or more of a cement pipe, a cast iron pipe, a steel pipe, a galvanized pipe, a PP pipe, a PE pipe and an aluminum-plastic composite pipe;

the standing time is 15-120 min;

the sewage is discharged from a tap water pipeline outlet of a user;

the frequency of the step 1) is 1-5 times.

The invention also provides a water pipe maintenance method, which comprises the following steps:

A) sending the coating liquid in the water pipe into a tap water metal pipeline from a home end, standing and replacing, and discharging residual liquid after coating;

the metal pipeline is cleaned by the cleaning method in any one of the technical schemes.

Preferably, the coating solution in the water pipe comprises, by mass:

15-30 parts of bactericidal metal salt;

0.01-0.3 parts by weight of a complexing agent;

60-85 parts of water;

and the standing and replacing time is 10-360 min.

Preferably, the bactericidal metal salt comprises one or more of silver salt, copper salt, titanium salt and gold salt;

the complexing agent comprises one or more of heteropolyacid salt, propargyl alcohol ethoxy compound, cerium sulfate, pyridinium salt, potassium tartrate, triethanolamine, potassium sodium tartrate, sodium citrate and ammonia water;

the water pipe comprises one or more of a cast iron water pipe, a steel water pipe and a galvanized water pipe.

Preferably, the silver salt comprises one or more of silver nitrate, silver methanesulfonate, silver eicosanoate and silver iodide;

detecting silver ions in the residual liquid through hydrochloric acid, and when white precipitates exist, indicating that the metal pipeline is completely coated with the film;

and discharging the residual liquid after film coating from a tap water pipeline outlet of a user.

The invention provides a water pipe cleaning agent which comprises, by mass, 12-50 parts of natural organic acid, 10-50 parts of citric acid, 10-15 parts of natural surfactant, 10-15 parts of natural bactericide and 10-25 parts of water. Compared with the prior art, the invention aims at the problems that the existing water supply pipelines, particularly the water pipelines for household tap water, have various types and long service life, and various heavy metals in rust, sludge, sand, oil, algae, bacteria and water are gradually accumulated and attached to the pipe walls of the water pipes. The existing method for cleaning the tap water pipe has the limitations that only sludge and partial water scale can be removed, rust and bacteria cannot be completely removed, and the installation structure of the water pipe and the water pipe can be damaged.

The invention creatively provides a water pipe cleaning agent which can remove dirt, rust and bacteria by chemical and physical changes, and can remove harmful heavy metal remained in a water pipe by utilizing the characteristic that citric acid has a chelating effect; meanwhile, the invention completely adopts natural raw materials, is safe, environment-friendly and pollution-free, and utilizes a sterilization system consisting of a natural bactericide, a natural surfactant and citric acid to more effectively kill harmful bacteria in the water pipe. The water pipe cleaning agent provided by the invention is connected with an external water supply device from a water inlet pipe of household tap water, the water pipe cleaning agent is conveyed into an indoor water pipe through the external water supply device, the cleaning agent stays in the water pipe for a period of time, and the cleaning agent and scale, rust and sludge on the inner wall of the water pipe are subjected to physical and chemical reactions to effectively remove the scale, rust and sludge and realize high-efficiency sterilization, and finally, sewage is discharged.

The water pipe cleaning agent disclosed by the invention is made of edible materials, has no secondary pollution to a water pipe, and cannot cause other damages to a human body even if residues exist; and the cleaning process is simple and convenient, the cleaning equipment is simple and easy to obtain, the cost of the cleaning agent and the cleaning process is low, the acceptance degree is high, and the method is suitable for large-scale popularization and application and has wide development prospect.

Experimental results show that after the cleaning method provided by the invention is adopted for cleaning and sterilizing, the water quality is clear and transparent, no precipitate is generated by titration with sodium hydroxide, and no bacterial colony is generated by taking a water sample for detection.

Detailed Description

For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.

All of the starting materials of the present invention, without particular limitation as to their source, may be purchased commercially or prepared according to conventional methods well known to those skilled in the art.

All the raw materials of the present invention are not particularly limited in their purity, and the present invention preferably employs a purity that is conventional in the field of analytical purification or drinking water equipment.

the natural organic acid is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to actual application conditions, product requirements and quality requirements, and in order to better remove scales, rust, sludge and bacteria in a water pipe, simultaneously not damage the material of the water pipe and ensure safety and no harm to a human body, the natural organic acid is preferably an acid which can react with a metal oxide but slowly react with the metal, and specifically can comprise one or more of citric acid, crataegolic acid, acetic acid, tartaric acid, vitamin C and ursolic acid, more preferably acetic acid, tartaric acid or vitamin C, and more preferably acetic acid.

The adding amount of the natural organic acid is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to the actual application condition, the product requirement and the quality requirement, in order to better remove scales, rust, sludge and bacteria in a water pipe, simultaneously not damage the material of the water pipe and ensure safety and no harm to a human body, the adding amount of the natural organic acid is preferably 12-50 parts by weight, more preferably 17-45 parts by weight, more preferably 22-40 parts by weight and more preferably 27-35 parts by weight.

The addition amount of the citric acid is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to actual application conditions, product requirements and quality requirements, in order to better remove scales, rust, sludge and bacteria in a water pipe, simultaneously avoid damaging the material of the water pipe and ensure safety and no harm to a human body, the addition amount of the citric acid is preferably 10-50 parts by weight, more preferably 15-45 parts by weight, more preferably 20-40 parts by weight, and more preferably 25-35 parts by weight.

The natural surfactant is not particularly limited in principle, and may be selected and adjusted by those skilled in the art according to practical application, product requirements and quality requirements, and preferably includes one or more of orange oil, Chinese honeylocust fruit oil and cashew nut oil, more preferably orange oil, Chinese honeylocust fruit oil or cashew nut oil, and even more preferably orange oil, in order to remove scale, rust, sludge and bacteria in the water pipe without damaging the material of the water pipe and ensure safety and no harm to human body.

The addition amount of the natural surfactant is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to actual application conditions, product requirements and quality requirements, in order to better remove scales, rust, sludge and bacteria in a water pipe, simultaneously not damage the material of the water pipe and ensure safety and no harm to a human body, the addition amount of the natural surfactant is preferably 10-15 parts by weight, more preferably 11-14 parts by weight, and more preferably 12-13 parts by weight.

The natural bactericide is not particularly limited in principle, and can be selected and adjusted by the natural bactericide known to the skilled in the art according to the actual application situation, the product requirement and the quality requirement, and in order to better remove water scales, rust, sludge and bacteria in the water pipe without damaging the material of the water pipe and ensure safety and no harm to human bodies, the natural bactericide preferably comprises one or more of garlicin, epsilon-polylysine, ginger extract and tea oil, more preferably garlicin, epsilon-polylysine, ginger extract or tea oil, and more preferably garlicin.

The adding amount of the natural bactericide is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to the actual application condition, the product requirement and the quality requirement, in order to better remove water scales, rust, sludge and bacteria in a water pipe, simultaneously not damage the material of the water pipe and ensure safety and no harm to a human body, the adding amount of the natural bactericide is preferably 10-15 parts by weight, more preferably 11-14 parts by weight, and more preferably 12-13 parts by weight.

The adding amount of the water is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to actual application conditions, product requirements and quality requirements, in order to better remove scales, rust, sludge and bacteria in the water pipe, simultaneously not damage the material of the water pipe and ensure safety and no harm to human bodies, the adding amount of the water is preferably 10-25 parts by weight, more preferably 12-23 parts by weight, and more preferably 15-20 parts by weight.

In order to better remove scales, rust, sludge and bacteria in a water pipe, simultaneously not damage the material of the water pipe and ensure safety and no harm to human bodies, the water pipe cleaning agent preferably further comprises a corn modified water absorbent, more preferably 3-10 parts by weight of the corn modified water absorbent, more preferably 4-9 parts by weight, more preferably 5-8 parts by weight and more preferably 6-7 parts by weight.

The water pipe cleaning agent is preferably used for cleaning one or more of a cement water pipe, a cast iron water pipe, a steel water pipe, a galvanized water pipe, a PP water pipe, a PE water pipe and an aluminum-plastic composite water pipe, and more preferably the cement water pipe, the cast iron water pipe, the steel water pipe, the galvanized water pipe, the PP water pipe, the PE water pipe or the aluminum-plastic composite water pipe.

The selection and composition of the raw materials in the water pipe cleaning agent required in the water pipe cleaning method and the corresponding optimization principle of the invention can be corresponding to the selection and composition of the corresponding raw materials in the water pipe cleaning agent and the corresponding optimization principle, and are not described in detail herein.

In the invention, the adding proportion of the water pipe cleaning agent and the water is not particularly limited in principle, and a person skilled in the art can select and adjust the water pipe cleaning agent and the water according to the actual application condition, the product requirement and the quality requirement, so that the scale, rust, sludge and bacteria in the water pipe can be better removed, the material of the water pipe is not damaged, the safety of the water pipe is ensured, and the water pipe cleaning agent and the water are preferably mixed according to the mass ratio of 1: (1-15), more preferably 1: (3-12), more preferably 1: (5-10), more preferably 1: (7-8).

The definition of the service end is not particularly limited, and may be defined by the conventional definition of the water pipe service end known to those skilled in the art, and those skilled in the art can select and adjust the service end according to the actual application, product requirements and quality requirements, and the service end of the present invention is preferably the tap water supply inlet of the user, i.e. the inlet main outlet, which can be understood as the outlet of the branch inlet main pipeline before the tap water supply pipeline enters the individual household, the collective user, the industrial and mining enterprise, the school, the public institution or the government organization.

The invention is more convenient for cleaning and process control, and improves the use effect, and the entrance end is provided with a water inlet or a water inlet and a valve. The invention has no special limitation on the structure, model and size selection of the water inlet, the structure, model and size selection of the valve, etc., and the water inlet and the valve for the tap water pipeline, which are well known to those skilled in the art, can be selected and adjusted according to the actual application situation, the product requirement and the quality requirement.

The standing condition is not particularly limited, and a person skilled in the art can select and adjust the standing condition according to the actual application condition, the product requirement and the quality requirement, wherein the standing time is preferably 15-120 min, more preferably 30-100 min, more preferably 45-90 min, and more preferably 60-75 min. The pressure for the standing in the present invention is preferably atmospheric pressure or increased pressure, and more preferably atmospheric pressure. The normal pressure of the invention means that the tap water pipeline is filled with the water pipe cleaning agent and water without pressurization operation. If the water pipe cleaning agent and water are added at the water supply inlet of the tap water, tap water or air in the original water pipe is discharged at one position in the terminal of the user until the tap water pipe cleaning agent and the water fed by the invention are completely filled in the tap water pipeline.

After the water pipe cleaning method provided by the invention is finished in standing, the cleaned sewage is directly discharged, namely the sewage is discharged from any one of the outlets of the tap water pipelines of users. The water pipe cleaning agent provided by the invention is edible material, has no secondary pollution to the water pipe, and does not cause other damages to human body even if residual exists. In order to better remove scales, rust, sludge and bacteria in the water pipe, the cleaning step can be preferably carried out once or for multiple times, and the frequency of the step 1) is preferably 1-5 times, more preferably 2-4 times, and more preferably 2-3 times.

The invention provides a method for cleaning and subsequently ensuring a water pipe, which has wider applicability and practicability, better realizes cleaning and maintenance of the inner wall of the water pipe, better improves the cleanliness of the water pipe, ensures the sterilization performance, and completely and thins the subsequent maintenance process, and also provides a method for maintaining the water pipe, which comprises the following steps:

The materials and terms required in the water pipe maintenance method and the corresponding preferred principles of the present invention can be corresponding to the materials and terms required in the water pipe cleaning method and the corresponding preferred principles, and are not described in detail herein.

The invention has no special limitation on the specific composition of the coating liquid in the water pipe in principle, and a person skilled in the art can select and adjust the coating liquid according to the actual application condition, the product requirement and the quality requirement, in order to better realize the coating of the inner wall of the water pipe, better improve the cleanliness of the water pipe and ensure the sterilization performance, the coating liquid in the water pipe preferably comprises the following components in percentage by mass:

15-30 parts of bactericidal metal salt;

0.01-0.3 parts by weight of a complexing agent;

60-85 parts of water.

The bactericidal metal salt is not particularly limited in principle, and may be a salt of a conventional bactericidal metal well known to those skilled in the art, and those skilled in the art can select and adjust the salt according to the actual application, product requirements and quality requirements. Specifically, one or more of silver nitrate, silver methanesulfonate, silver eicosanoate, and silver iodide may be included, more preferably silver nitrate, silver methanesulfonate, silver eicosanoate, or silver iodide, and still more preferably silver nitrate.

The addition amount of the bactericidal metal salt is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to actual application conditions, product requirements and quality requirements, in order to better realize coating on the inner wall of a water pipe, better improve the cleanliness of the water pipe and ensure the bactericidal performance, the addition amount of the bactericidal metal salt is preferably 15-30 parts by weight, more preferably 17-28 parts by weight, more preferably 20-25 parts by weight, and particularly 20 parts by weight.

The complexing agent is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to the actual application situation, product requirements and quality requirements, in order to better realize the coating of the inner wall of the water pipe, better improve the cleanliness of the water pipe and ensure the bactericidal performance, the complexing agent preferably comprises one or more of heteropolyacid salt, propargyl alcohol ethoxylate, cerium sulfate, pyridinium salt, potassium tartrate, triethanolamine, potassium sodium tartrate, sodium citrate and ammonia water, and more preferably comprises one or more of heteropolyacid salt, propargyl alcohol ethoxylate, cerium sulfate, pyridinium salt, potassium tartrate, triethanolamine, potassium sodium tartrate, sodium citrate or ammonia water.

The addition amount of the complexing agent is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to the actual application condition, the product requirement and the quality requirement, in order to better realize coating on the inner wall of a water pipe, better improve the cleanliness of the water pipe and ensure the sterilization performance, the addition amount of the complexing agent is preferably 0.01-0.3 part by weight, more preferably 0.05-0.25 part by weight, more preferably 0.1-0.2 part by weight, and particularly can be 0.05 part by weight.

The adding amount of the water is not particularly limited in principle, and can be selected and adjusted by a person skilled in the art according to actual application conditions, product requirements and quality requirements, in order to better realize coating on the inner wall of the water pipe, better improve the cleanliness of the water pipe and ensure the sterilization performance, the adding amount of the water is preferably 60-85 parts by weight, more preferably 65-80 parts by weight, more preferably 70-75 parts by weight, and particularly 80 parts by weight.

In order to better realize the coating of the inner wall of the water pipe, better improve the cleanliness of the water pipe and ensure the sterilization performance, the water pipe is a tap water metal pipeline, and specifically comprises one or more of a cast iron water pipe, a steel water pipe and a galvanized water pipe, and more preferably comprises the cast iron water pipe, the steel water pipe or the galvanized water pipe.

The invention is more convenient for film coating and process control, and improves the use effect, and the entrance end is provided with a water inlet or a water inlet and a valve. The invention has no special limitation on the structure, model and size selection of the water inlet, the structure, model and size selection of the valve, etc., and the water inlet and the valve for the tap water pipeline, which are well known to those skilled in the art, can be selected and adjusted according to the actual application situation, the product requirement and the quality requirement.

The standing and replacing conditions are not particularly limited, and a person skilled in the art can select and adjust the conditions according to the actual application situation, the product requirements and the quality requirements, wherein the standing and replacing time is preferably 10-360 min, more preferably 60-300 min, more preferably 120-240 min, and more preferably 150-210 min. The pressure for the standing substitution in the present invention is preferably normal pressure or increased pressure, and more preferably normal pressure. The normal pressure of the invention means that the coating liquid in the water pipe is filled in the tap water pipeline without pressurization operation. If the coating liquid in the water pipe is added at the water supply inlet of the tap water, the tap water or the air in the original water pipe is discharged at one position of the terminal of the user until the coating liquid in the water pipe fed by the invention is completely filled in the tap water pipeline.

The method for coating the film in the water pipe provided by the invention directly discharges the residual liquid after the film coating after the standing replacement is finished, namely the residual liquid after the film coating is discharged from any one of tap water pipeline outlets of users. And the silver ions in the residual liquid are detected by hydrochloric acid, and when white precipitates exist, the metal pipeline can be judged to be completely coated.

The coating liquid for coating the film in the metal water pipe provided by the invention utilizes the metals such as iron, aluminum and the like in the metal water pipe to replace silver ions in the soluble silver salt through chemical replacement, so that a compact sterilization metal layer is formed on the inner wall of the water pipe, and the cleanness of drinking water is ensured by utilizing the sterilization performance of the sterilization metal. The water pipe inner wall film coating method adopting the film coating liquid can prevent the regeneration of dirt and bacterial colony, even if the water pipe wall is used all the year round, by combining the special cleaning method of the invention, the cleaned pipe wall can form a new metal layer to remove the original dirt, rust, scale, bacteria and the like, and after film coating, the sterilization metal layer can effectively prevent the oxidation of the pipe wall of the metal water pipe by oxygen in water and the generation of dirt, thus fundamentally reducing the generation of rust and bacteria, further solving the problems of continuous secondary pollution and dirt generation of the metal water pipe, solving the problems of cleaning and sterilization of the water pipe and achieving the effect of lasting maintenance.

The steps of the invention provide a drinking water pipe cleaning agent, a drinking water pipe cleaning method and a drinking water pipe maintenance method. The invention can remove dirt, rust and bacteria by chemical and physical changes, and can remove harmful heavy metal remained in the water pipe by utilizing the characteristic that citric acid has chelation; meanwhile, the invention completely adopts natural raw materials, is safe, environment-friendly and pollution-free, and utilizes a sterilization system consisting of a natural bactericide, a natural surfactant and citric acid to more effectively kill harmful bacteria in the water pipe. The invention adopts natural organic acid which can react with metal oxide but slowly react with metal, can remove rust and alkaline dirt, does not damage the water pipe body, and the water pipe cleaning agent is edible material, has no secondary pollution to the water pipe, does not cause other damage to human body even if residual, and has high safety.

The invention adopts the water pipe cleaning agent provided by the invention, an external water supply device is connected from the water inlet pipe of the household tap water, the water pipe cleaning agent is conveyed into the indoor water pipe through the external water supply device, the cleaning agent stays in the water pipe for a period of time, and the cleaning agent and the scale, rust and sludge on the inner wall of the water pipe are subjected to physical and chemical reactions to effectively remove the scale, rust and sludge, realize high-efficiency sterilization and finally discharge sewage.

The method for cleaning the drinking water pipe has the advantages of simple and convenient cleaning process, simple and easily-obtained cleaning equipment, low cost of the cleaning agent and the cleaning process, high acceptance degree, suitability for large-scale popularization and application and wide development prospect.

For further illustration of the present invention, the following will describe in detail a water pipe cleaning agent, a water pipe cleaning method and a water pipe maintenance method provided by the present invention with reference to the following examples, but it should be understood that these examples are implemented on the premise of the technical solution of the present invention, and the detailed embodiments and specific operation procedures are given, only for further illustration of the features and advantages of the present invention, not for limitation of the claims of the present invention, and the protection scope of the present invention is not limited to the following examples.

Example 1

The formula of the cleaning agent is as follows:

acetic acid 30

Citric acid 40

Orange oil 10

Allicin 10

Corn starch modified water absorbent 5

Purified water 20

The cleaning method comprises the following steps:

a water inlet and a valve are additionally arranged at an inlet for supplying water for a family, the water pipe cleaning agent and water (1: 10) which are prepared according to the proportion are conveyed into an indoor water pipe by a water pump, and the cleaning agent and water scale, rust and sludge on the inner wall of the water pipe are subjected to physical and chemical reactions to effectively remove the water scale, rust and sludge. The sterilization effect of the garlicin, the orange oil and the citric acid is utilized to effectively kill harmful bacteria in the water pipe. After the cleaning agent stays in the water pipe for 60 minutes, the water pipe cleaning agent and water (1: 20) are conveyed into the water pipe by the water pump again for 30 minutes after the sewage is discharged. The cleaning purpose is achieved after the clear water is discharged.

And (4) comparing and detecting the water pipes before and after cleaning. Tap water (cold boiled water) which is boiled at normal temperature is used as a detection medium.

Before the water pipe is cleaned, after the water pipe is emptied, cold boiled water is rapidly introduced into the water inlet valve of the water pipe, a water sample is taken from the water outlet and is observed by naked eyes, a turbidity phenomenon occurs, and simultaneously, a precipitate is titrated by sodium hydroxide. And (3) carrying out colony detection on the water sample by using a colony counter, wherein 3000 water is contained in each liter after measurement and calculation, and secondary colony pollution in the water pipe is proved.

After the water pipe is cleaned and sterilized, the water pipe is flushed with cold boiled water, the water quality is clear and transparent, and no precipitate is generated by titration with sodium hydroxide. The water sample is subjected to bacterial colony detection by using a bacterial colony counter, and the water sample is subjected to bacterial colony detection and bacterial colony free.

Example 2

The formula of the cleaning agent is as follows:

maslinic acid 20

Citric acid 30

Orange oil 10

Allicin 10

Corn starch modified water absorbent 8

Pure water 22

And detecting the cleaned water pipe. Tap water (cold boiled water) which is boiled at normal temperature is used as a detection medium.

Example 3

The formula of the cleaning agent is as follows:

acetic acid 10

Maslinic acid 10

Citric acid 30

Orange oil 10

Allicin 10

Corn starch modified water absorbent 6

Purified water 24

The formula of the water pipe silver plating solution comprises:

silver nitrate 25

74.9 parts of distilled water

Sodium citrate 0.1

The coating method comprises the following steps:

pumping the silver plating solution into the cleaned water pipe by using a water pump. Staying for 1 hour to perform chemical replacement reaction, and replacing silver ions in the soluble silver salt by using iron and aluminum metal. A compact metal silver layer is formed on the inner wall of the water pipe, and the cleanness of drinking water is guaranteed by utilizing the bactericidal property of the metal silver. After the plating is finished, the residual silver ions in the effluent plating solution can be detected by hydrochloric acid. The white precipitate is completely coated on the water pipe.

The water pipe having a dense metal coating formed after silver plating was examined as follows.

After the water pipe is cleaned, sterilized and coated, the water pipe is washed by cold boiled water, the water quality is clear and transparent, and no precipitate is generated by titration with sodium hydroxide. The water sample is subjected to bacterial colony detection by using a bacterial colony counter, and the water sample is subjected to bacterial colony detection and bacterial colony free. And (3) placing the cold boiled water into a water pipe for standing for a week, detecting, wherein the water quality is clear and transparent, and taking a water sample to perform bacterial colony detection by using a bacterial colony counter without bacterial colonies.

Example 4

The formula of the cleaning agent is as follows:

vitamin C5

Maslinic acid 10

Citric acid 35

Orange oil 10

Allicin 10

Corn starch modified water absorbent 6

Purified water 24

The formula of the water pipe silver plating solution comprises:

silver nitrate 25

74.9 parts of distilled water

Sodium citrate 0.1

The coating method comprises the following steps:

The above detailed description of a drinking water pipe cleaning agent, a method for cleaning a drinking water pipe, and a method for maintaining a drinking water pipe according to the present invention has been provided, and the principles and embodiments of the present invention are described herein using specific examples, which are provided only to help understand the method of the present invention and its core ideas, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any combination of the methods. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. The scope of the invention is defined by the claims and may include other embodiments that occur to those skilled in the art. Such other embodiments are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.

Claims

1. A maintenance method of a water pipe is characterized by comprising the following steps:

the coating liquid in the water pipe comprises the following materials in parts by mass:

15-30 parts of bactericidal metal salt;

0.01-0.3 parts by weight of a complexing agent;

60-85 parts of water;

the standing and replacing time is 10-360 min;

the metal pipeline is cleaned;

the cleaning method comprises the following steps:

1) conveying a water pipe cleaning agent and water into a tap water pipeline from a house end, standing, and then discharging cleaned sewage;

the water pipe cleaning agent is composed of the following materials in parts by mass:

12-50 parts by weight of natural organic acid;

10-50 parts by weight of citric acid;

10-15 parts by weight of a natural surfactant;

10-15 parts of a natural bactericide;

10-25 parts by weight of water;

3-10 parts by weight of a corn modified water absorbent;

the natural organic acid comprises one or more of citric acid, maslinic acid, acetic acid, tartaric acid, vitamin C and ursolic acid;

the natural bactericide comprises one or more of garlicin, epsilon-polylysine, ginger extract and tea oil.

2. The curing method of claim 1, wherein the water pipe cleaning agent can be used for cleaning one or more of cement water pipes, cast iron water pipes, steel water pipes, galvanized water pipes, PP water pipes, PE water pipes and aluminum-plastic composite water pipes;

the water pipe comprises a tap water pipe.

3. A maintenance method according to claim 1, wherein the mass ratio of the water pipe cleaning agent to the water is 1: (1-15);

the service end is a tap water supply inlet of a user;

4. The curing method of claim 1, wherein the tap water pipeline comprises one or more of a cement pipe, a cast iron pipe, a steel pipe, a galvanized pipe, a PP pipe, a PE pipe, and an aluminum plastic composite pipe;

the standing time is 15-120 min;

the sewage is discharged from a tap water pipeline outlet of a user;

the frequency of the step 1) is 1-5 times.

5. The curing method of claim 1, wherein the bactericidal metal salt comprises one or more of a silver salt, a copper salt, a titanium salt, and a gold salt;

6. The curing method of claim 5, wherein the silver salt comprises one or more of silver nitrate, silver methanesulfonate, silver eicosanoate, and silver iodide;