Pipeline anti-scaling treatment agent, preparation method and pipeline inner wall anti-scaling treatment method

Abstract

The invention relates to the field of sewage pipeline scale prevention, in particular to a pipeline scale prevention treatment agent, a preparation method and a pipeline inner wall scale prevention treatment method. The invention relates to a pipeline anti-scaling treatment agent, which is prepared from the following raw materials in parts by mass: 1 to 5 parts of surfactants, 5 to 10 parts of starch, 1 to 3 parts of sodium humate, 1 to 5 parts of benzotriazole sodium, 5 to 15 parts of Chinese alpine rush fibers and 50 to 70 parts of water. The preparation method comprises the step of mixing the raw materials for 30-45 minutes under the conditions of 500-800 r / min and 50-60 DEG C to obtain the pipeline anti-scaling treatment agent. The method has the advantage that the anti-scaling effect is improved, and the requirements of a sewage treatment plant for an efficient, environment-friendly and economical anti-scaling technology can be met.

Description

Technical Field

[0001] The present application relates to the field of sewage pipe anti-scaling, and more specifically, to a pipe anti-scaling treatment agent and a preparation method thereof, and a pipe inner wall anti-scaling treatment method. Background Art

[0002] In the daily operation of sewage treatment plants, the pipeline system is a key part that connects various treatment units. Its operating status is directly related to the efficiency and effect of the entire sewage treatment process. However, due to the complex components contained in sewage, such as soluble salts, organic matter, microorganisms and their metabolites, they are easily deposited on the inner wall during the flow in the pipeline, forming a scale layer that is difficult to remove. The existence of these scale layers not only reduces the water delivery capacity of the pipeline and increases energy consumption, but may also become a breeding ground for bacteria, aggravating the corrosion of the pipeline and even causing pipeline blockage, affecting the normal operation of the sewage treatment plant.

[0003] In order to deal with this problem, sewage treatment plants currently generally use physical cleaning, chemical cleaning or adding anti-scaling agents to prevent and remove scale layers on the inner wall of the pipe. Although physical cleaning methods such as high-pressure water jets can effectively remove scale layers, they are complicated to operate, costly, and difficult to achieve continuous protection of the inner wall of the pipe. Although chemical cleaning methods can penetrate deep into the scale layer for cleaning, some chemical agents may corrode the pipe material and pose certain environmental risks. Traditional anti-scaling agents often have problems such as single ingredients, unstable anti-scaling effects, and lack of environmental friendliness, which makes it difficult to meet the needs of sewage treatment plants for efficient, environmentally friendly, and economical anti-scaling technologies. Summary of the invention

[0004] In order to improve the anti-scaling effect, the present application provides a pipeline anti-scaling treatment agent and a preparation method and a pipeline inner wall anti-scaling treatment method.

[0005] In the first aspect, the present application provides a pipeline anti-scaling treatment agent, which adopts the following technical solution: A pipeline anti-scaling treatment agent comprises the following raw materials in parts by mass: 1-5 parts of surfactant, 5-10 parts of starch, 1-3 parts of sodium humate, 1-5 parts of sodium benzotriazole, 5-15 parts of spatholobiaceae fiber, and 50-70 parts of water.

[0006] By adopting the above technical scheme, with the cooperation of starch, sodium humate, sodium benzotriazole and sedge fiber, a protective film is formed on the inner wall of the pipe due to the good adsorption and complexing ability of starch, and the sedge fiber acts as a skeleton to further enhance the strength of the protective film. The addition of sodium benzotriazole not only enhances the anti-scaling effect, but also protects the metal surface of the pipe through its corrosion inhibition effect, reduces the rough surface caused by corrosion, and further reduces the possibility of scale adhesion. Sodium humate is a complex mixture of polymer carboxylates containing a variety of active groups. As a component of the protective film, it can react with calcium ions in water to form a complex reaction, thereby inhibiting the formation of scale bodies such as calcium carbonate, making it difficult for inorganic salts such as calcium ions to deposit easily.

[0007] Specifically, a large number of hydroxyl groups in starch molecules can undergo adsorption and complexation reactions with calcium ions, etc., reducing the active sites of calcium ions on the inner wall of the pipe, thereby inhibiting the initial formation of scale layers. In addition, starch can also serve as a carrier to increase the adhesion and uniformity of other anti-scaling ingredients. Sodium humate also has good dispersibility, which can disperse the already formed tiny scale particles in the water to prevent them from further aggregation and deposition. With its high specific surface area and excellent adsorption properties, dragon beard grass fiber can effectively adsorb and fix scale precursors such as calcium ions in water. At the same time, the addition of dragon beard grass fiber can also enhance the mechanical strength and adhesion of the anti-scaling treatment agent, allowing it to form a long-lasting protective layer on the inner wall of the pipe, blocking the further deposition of scale on the inner wall of the pipe.

[0008] Starch is a natural polysaccharide macromolecular chemical. If used alone, its stability and anti-scaling properties are not ideal. With the cooperation of the four, the stability of the anti-scaling agent can be effectively enhanced, and it can also maintain excellent anti-scaling effects under high temperature and other conditions.

[0009] Preferably, the pipeline anti-scaling agent includes the following raw materials in parts by mass: 1-5 parts of surfactant, 6-8 parts of starch, 1.5-2.5 parts of sodium humate, 3-5 parts of sodium benzotriazole, 8.5-12.5 parts of spatholobiaceae fiber, and 60-65 parts of water.

[0010] Preferably, the starch comprises a mixture of one or more of corn starch, potato starch and sweet potato starch.

[0011] Preferably, the surfactant includes a mixture of one or more of sodium dodecylbenzene sulfonate, sodium laureth sulfate, dodecyldimethylbenzyl ammonium bromide and Tween.

[0012] Preferably, the preparation of the sedge fiber comprises the following steps: Step a: cutting and cleaning the dragon beard grass; Step b: soaking the dragon beard grass in a mixed solution and performing ultrasonic treatment; after solid-liquid separation, the solid part is the soaked dragon beard grass; the mixed solution includes NaOH, H2O2, and water, the concentration of NaOH is 10-15%, and the concentration of H2O2 is 0.1-0.3%; Step c: washing and soaking the dragon beard grass, and drying to obtain the dragon beard grass fiber.

[0013] By adopting the above technical scheme, the dragon beard grass fiber is extracted in a specific way, which can be more fully coordinated with starch, sodium humate, and sodium benzotriazole, further enhancing the role as a skeleton, making the protective film stronger and more anti-scaling for a long time; and it can better cope with high temperature, corrosion and other conditions.

[0014] Preferably, in step b, the mass ratio of the herb to the mixed solution is 1:(5-10), with the mass of the herb as the benchmark.

[0015] Preferably, in step b, the ultrasonic treatment is performed at an ultrasonic frequency of 30-35 kHz for 45-70 min.

[0016] Preferably, in the step b, the herb is soaked in the mixed solution at 80-100° C. for 1-2 hours.

[0017] In the second aspect, the present application provides a method for preparing a pipeline anti-scaling treatment agent, adopting the following technical scheme: a method for preparing a pipeline anti-scaling treatment agent, comprising the following steps: mixing the raw materials at 500-800r / min and 50-60°C for 30-45min to obtain a pipeline anti-scaling treatment agent.

[0018] By adopting the above technical solution, mixing is carried out at a specific rotation speed and temperature, so that the pipeline anti-scaling treatment agent is mixed more fully and the matching effect is further enhanced.

[0019] In a third aspect, the present application provides a method for anti-scaling treatment of the inner wall of a pipeline, which adopts the following technical solution: A method for anti-scaling treatment of the inner wall of a pipeline comprises the following steps: Step 1: Mix the pipeline anti-scaling agent and water until uniform to obtain a treatment solution with a concentration of 1-5%; Step 2: Pass the treatment solution into the pipeline, block the pipeline, allow the treatment solution and the inner wall of the pipeline to be fully soaked, and wait for 2-4 hours; Step 3: Drain the treatment solution.

[0020] In summary, this application has the following beneficial effects: 1. With the cooperation of starch, sodium humate, sodium benzotriazole and sedge fiber, a protective film can be formed on the inner wall of the pipe to protect the pipe, reduce the corrosion of sewage on the pipe, and make it difficult for the scale layer to adhere to the inner wall of the pipe, thereby improving the anti-scaling effect.

[0021] 2. Starch is a natural polysaccharide macromolecular chemical. If used alone, its stability and anti-scaling performance are not ideal. When starch, sodium humate, sodium benzotriazole and sedge fiber are used together, the stability of the anti-scaling agent can be effectively enhanced, and the excellent anti-scaling effect can be maintained under high temperature and other conditions.

[0022] 3. The dragon beard grass fiber is extracted using a specific method, which can cooperate more fully with starch, sodium humate, and sodium benzotriazole, further enhancing its role as a skeleton, making the protective film stronger, more anti-scaling, and better able to cope with high temperature, corrosion and other conditions. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with embodiments.

[0024] The raw materials used in the following examples and comparative examples are all commercially available products. Example

[0025] Example 1 A pipeline anti-scaling treatment agent comprises the following raw materials: surfactant, starch, sodium humate, sodium benzotriazole, spatholobiaceae fiber and water.

[0026] The specific amount of each raw material is shown in Table 1.

[0027] The surfactants are sodium dodecylbenzene sulfonate and sodium laureth sulfate.

[0028] The starch is corn starch.

[0029] The fiber of dragon beard grass is homemade, including the following steps: Step a: Cut the dragon beard grass into 3-5cm long strips, wash it with clean water and remove impurities.

[0030] Step b: preparing a mixed solution, the mixed solution comprising NaOH, H2O2, and water, wherein the concentration of NaOH is 12% and the concentration of H2O2 is 0.2%.

[0031] Soak the cleaned sedge in the mixed solution at 90°C for 1.5 hours. The mass ratio of sedge to the mixed solution is 1:8.

[0032] Then, the mixture was treated with ultrasound at a frequency of 32 kHz for 60 min.

[0033] The solid and liquid are separated, and the solid part is the soaked dragon beard grass.

[0034] Step c: washing and soaking the dragon beard grass, and drying to constant weight to obtain the dragon beard grass fiber.

[0035] The present application also provides a method for preparing a pipeline anti-scaling treatment agent, comprising the following steps: mixing the raw materials at 700 r / min and 55° C. for 40 minutes to obtain the pipeline anti-scaling treatment agent.

[0036] This embodiment also provides a method for anti-scaling treatment of the inner wall of a pipeline, comprising the following steps: Step 1: Mix the pipeline anti-scaling agent and water until uniform, and obtain a treatment solution with a concentration of 1-5%. In this embodiment, the concentration is 3%.

[0037] Step 2: Pass the treatment solution into the pipeline, block the pipeline, allow the treatment solution to fully soak the inner wall of the pipeline, and wait for 2-4 hours. In this embodiment, wait for 3 hours.

[0038] Step 3: Drain the treatment solution.

[0039] Example 2 A pipeline anti-scaling treatment agent, which is different from Example 1 in that the amounts of various raw materials are different, as shown in Table 1 for details.

[0040] The surfactant is dodecyl dimethyl benzyl ammonium bromide.

[0041] The starch is sweet potato starch.

[0042] The fiber of dragon beard grass is homemade, including the following steps: Step a: Cut the dragon beard grass into 3-5cm long strips, wash it with clean water and remove impurities.

[0043] Step b: preparing a mixed solution, the mixed solution comprising NaOH, H2O2, and water, wherein the concentration of NaOH is 10% and the concentration of H2O2 is 0.3%.

[0044] Soak the cleaned sedge in the mixed solution at 80°C for 2 hours. The mass ratio of sedge to the mixed solution is 1:5.

[0045] Then, the mixture was treated with ultrasound at a frequency of 30 kHz for 70 min.

[0046] The solid and liquid are separated, and the solid part is the soaked dragon beard grass.

[0047] Step c: washing and soaking the dragon beard grass, and drying to constant weight to obtain the dragon beard grass fiber.

[0048] A method for preparing a pipeline anti-scaling agent, which is different from Example 1 in that it comprises the following steps: mixing the raw materials at 500 r / min and 60° C. for 45 minutes to obtain the pipeline anti-scaling agent.

[0049] Example 3 A pipeline anti-scaling treatment agent, which is different from Example 1 in that the amounts of various raw materials are different, as shown in Table 1 for details.

[0050] The surfactant was Tween 80.

[0051] The starch is potato starch.

[0052] The fiber of dragon beard grass is homemade, including the following steps: Step a: Cut the dragon beard grass into 3-5cm long strips, wash it with clean water and remove impurities.

[0053] Step b: preparing a mixed solution, the mixed solution comprising NaOH, H2O2, and water, wherein the concentration of NaOH is 15% and the concentration of H2O2 is 0.1%.

[0054] Soak the cleaned sedge in the mixed solution at 100°C for 1 hour. The mass ratio of sedge to the mixed solution is 1:10.

[0055] Then, the mixture was treated with ultrasound at a frequency of 35 kHz for 45 min.

[0056] The solid and liquid are separated, and the solid part is the soaked dragon beard grass.

[0057] Step c: washing and soaking the dragon beard grass, and drying to constant weight to obtain the dragon beard grass fiber.

[0058] A method for preparing a pipeline anti-scaling agent, which is different from Example 1 in that it comprises the following steps: mixing the raw materials at 800 r / min and 50° C. for 30 minutes to obtain the pipeline anti-scaling agent.

[0059] Example 4 A pipeline anti-scaling treatment agent, which is different from Example 1 in that the amounts of various raw materials are different, as shown in Table 1 for details.

[0060] Table 1 Example 5 A pipeline anti-scaling agent, which is different from Example 1 in that: The fiber of dragon beard grass is homemade, including the following steps: Step a: Cut the dragon beard grass into 3-5cm long strips, wash it with clean water and remove impurities.

[0061] Step b: preparing a mixed solution, the mixed solution comprising NaOH, H2O2, and water, wherein the concentration of NaOH is 12% and the concentration of H2O2 is 0.2%.

[0062] Soak the cleaned sedge in the mixed solution at 25°C for 1.5 hours. The mass ratio of sedge to the mixed solution is 1:8.

[0063] Then, the mixture was treated with ultrasound at a frequency of 32 kHz for 60 min.

[0064] The solid and liquid are separated, and the solid part is the soaked dragon beard grass.

[0065] Step c: washing and soaking the dragon beard grass, and drying to constant weight to obtain the dragon beard grass fiber.

[0066] Example 6 A pipeline anti-scaling agent, which is different from Example 1 in that: The fiber of dragon beard grass is homemade, including the following steps: Step a: Cut the dragon beard grass into 3-5cm long strips, wash it with clean water and remove impurities.

[0067] Step b: preparing a mixed solution, the mixed solution comprising NaOH, H2O2, and water, wherein the concentration of NaOH is 12% and the concentration of H2O2 is 0.2%.

[0068] Soak the cleaned sedge in the mixed solution at 90°C for 1.5 hours. The mass ratio of sedge to the mixed solution is 1:8.

[0069] Then, the mixture was treated with ultrasound at a frequency of 10 kHz for 60 min.

[0070] The solid and liquid are separated, and the solid part is the soaked dragon beard grass.

[0071] Step c: washing and soaking the dragon beard grass, and drying to constant weight to obtain the dragon beard grass fiber.

[0072] Example 7 A pipeline anti-scaling agent, which is different from Example 1 in that: The fiber of dragon beard grass is homemade, including the following steps: Step a: Cut the dragon beard grass into 3-5cm long strips, wash it with clean water and remove impurities.

[0073] Step b: preparing a mixed solution, the mixed solution comprising NaOH, H2O2, and water, wherein the concentration of NaOH is 12% and the concentration of H2O2 is 0.2%.

[0074] Soak the cleaned sedge in the mixed solution at 90°C for 1.5 hours. The mass ratio of sedge to the mixed solution is 1:8.

[0075] Then, the mixture was treated at an ultrasonic frequency of 100 kHz for 60 min.

[0076] The solid and liquid are separated, and the solid part is the soaked dragon beard grass.

[0077] Step c: washing and soaking the dragon beard grass, and drying to constant weight to obtain the dragon beard grass fiber.

[0078] Example 8 A method for preparing a pipeline anti-scaling agent is different from that of Example 1 in that the raw materials are mixed for 40 minutes at 700 r / min and 25° C. to obtain the pipeline anti-scaling agent.

[0079] Example 9 A method for preparing a pipeline anti-scaling agent is different from that of Example 1 in that the raw materials are mixed at 70 r / min and 55° C. for 40 minutes to obtain the pipeline anti-scaling agent.

[0080] Comparative Example Comparative Example 1 A method for preparing a pipeline anti-scaling agent, which is different from Example 1 in that starch is replaced by xanthan gum.

[0081] Comparative Example 2 A method for preparing a pipeline anti-scaling agent, which is different from Example 1 in that sodium humate is replaced by chitosan.

[0082] Comparative Example 3 A method for preparing a pipeline anti-scaling agent, which is different from Example 1 in that sodium benzotriazole is omitted and water is used to supplement its original amount.

[0083] Comparative Example 4 A method for preparing a pipeline anti-scaling agent, which is different from Example 1 in that the dragon beard grass fiber is replaced by rice straw fiber.

[0084] Rice straw fiber was commercially available from Jiangxi Gongtu Ecological Technology Co., Ltd.

[0085] Performance testing Test 1: The pipeline anti-scaling treatment agents of Examples 1-9 and Comparative Examples 1-4 were tested with reference to GB 16632-2008 "Determination of scale inhibition performance of water treatment agents - Calcium carbonate deposition method", and the scale inhibition rates were recorded in Table 2.

[0086] Test 2: A small section of pipe was treated with anti-scaling method for the inner wall of the pipe according to the anti-scaling method provided in the present application. The pipe was immersed in industrial park sewage at 50°C for 8 hours every day, and placed in a space at 25°C and 65% humidity for the remaining 16 hours. This was repeated for 30 days.

[0087] The blank control pipe was not subjected to anti-scaling treatment on the inner wall.

[0088] After taking it out, observe whether there is scaling or scale layer on the inner wall of the pipe, and record the results in Table 2.

[0089] Table 2 According to the test results in Table 2, the anti-scaling agent for pipes of Examples 1-4 has a high anti-scaling and anti-scaling effect on calcium carbonate; the anti-scaling agent for pipes of Examples 1-4 is used to treat pipes, and after being treated with sewage immersion, high temperature, etc., the pipes can still maintain a good state of no scale layer. This indicates that the anti-scaling agent for pipes provided in this application is suitable for pipes for treating sewage, can well resist corrosion, high temperature and other adverse conditions, and achieve long-term anti-scaling.

[0090] Comparative Examples 1-4 are based on Example 1, but starch, sodium humate, sodium benzotriazole, and sedge fiber are omitted or replaced. The anti-scaling and anti-fouling ability of the obtained pipeline anti-scaling agent on calcium carbonate is greatly reduced compared with Example 1; under conditions of sewage immersion, high temperature, etc., it is also impossible to maintain the scale-free effect on the inner wall of the pipeline. This shows that there are some special combinations between starch, sodium humate, sodium benzotriazole, and sedge fiber. Under specific selection, dosage and combination, a tough protective film can be formed on the inner wall of the pipeline to block the deposition of soluble salts, organic matter, microorganisms, etc. In addition, the special combination of the four can improve the instability of starch, enhance the ability to resist high temperature and other conditions, and prolong the anti-scaling protection period.

[0091] Example 5 is based on Example 1, but changes the soaking temperature of the dragon beard grass fiber; Examples 6 and 7 are based on Example 1, but change the ultrasonic treatment conditions of the dragon beard grass fiber. According to the test data in Table 2, the above changes in the preparation conditions of the dragon beard grass fiber will affect the coordination relationship between the dragon beard grass fiber and starch, sodium humate, and sodium benzotriazole. Although it can still show a good anti-scaling effect, it is not as good as the effect of Example 1. It shows that after further limiting the preparation conditions of the dragon beard grass fiber, the obtained dragon beard grass fiber can give full play to the skeleton role in the system, thereby enhancing the anti-scaling effect.

[0092] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A pipeline anti-scaling agent, characterized in that: In terms of mass parts, it includes the following raw materials: 1-5 parts of surfactant, 5-10 parts of starch, 1-3 parts of sodium humate, 1-5 parts of sodium benzotriazole, 5-15 parts of spatholobiaceae fiber, and 50-70 parts of water.

2. The pipeline anti-scaling agent according to claim 1, characterized in that: The pipeline anti-scaling agent includes the following raw materials in parts by mass: 1-5 parts of surfactant, 6-8 parts of starch, 1.5-2.5 parts of sodium humate, 3-5 parts of sodium benzotriazole, 8.5-12.5 parts of sedge fiber, and 60-65 parts of water.

3. The pipeline anti-scaling agent according to claim 1, characterized in that: The starch comprises a mixture of one or more of corn starch, potato starch and sweet potato starch.

4. The pipeline anti-scaling agent according to claim 1, characterized in that: The surfactant includes a mixture of one or more of sodium dodecylbenzene sulfonate, sodium laureth sulfate, dodecyldimethylbenzyl ammonium bromide and Tween.

5. The pipeline anti-scaling agent according to claim 1, characterized in that: The preparation of the sedge fiber comprises the following steps: Step a: cutting and cleaning the dragon beard grass; Step b: soaking the dragon beard grass in a mixed solution and performing ultrasonic treatment; after solid-liquid separation, the solid part is the soaked dragon beard grass; the mixed solution includes NaOH, H2O2, and water, the concentration of NaOH is 10-15%, and the concentration of H2O2 is 0.1-0.3%; Step c: washing and soaking the dragon beard grass, and drying to obtain the dragon beard grass fiber.

6. The pipeline anti-scaling agent according to claim 5, characterized in that: In the step b, the mass ratio of the spatholobi to the mixed solution is 1:(5-10), with the mass of the spatholobi being used as the basis.

7. The pipeline anti-scaling agent according to claim 5, characterized in that: In the step b, the ultrasonic treatment is carried out at an ultrasonic frequency of 30-35 kHz for 45-70 minutes.

8. The pipeline anti-scaling agent according to claim 5, characterized in that: In the step b, the dragon beard grass is soaked in the mixed solution at 80-100° C. for 1-2 hours.

9. A method for preparing the pipeline anti-scaling agent according to any one of claims 1 to 8, characterized in that: The following steps are involved: The raw materials are mixed at 500-800 r / min and 50-60° C. for 30-45 minutes to obtain a pipeline anti-scaling treatment agent.

10. A method for anti-scaling treatment of the inner wall of a pipeline, characterized in that: The following steps are involved: Step 1: Mix the pipeline anti-scaling agent according to any one of claims 1 to 8 or the pipeline anti-scaling agent prepared by the preparation method of the pipeline anti-scaling agent according to claim 9 with water until uniformly mixed to obtain a treatment solution with a concentration of 1-5%; Step 2: Pass the treatment solution into the pipeline, block the pipeline, allow the treatment solution and the inner wall of the pipeline to be fully soaked, and wait for 2-4 hours; Step 3: Drain the treatment solution.

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