An efficient scale and corrosion inhibitor and its preparation process

Abstract

The present invention relates to the technical field of water treatment, and specifically, to a high-efficiency scale and corrosion inhibitor and its preparation process. It includes Step 1, material preparation; Step 2, operation of the first reaction kettle; Step 3, operation of the second reaction kettle; Step 4, subsequent operations. In this high-efficiency scale and corrosion inhibitor and its preparation method, by controlling the addition mass of each raw material and operation parameters, the stability of product quality is improved. PBTC can effectively disperse insoluble inorganic salts, protect industrial equipment and improve water treatment efficiency; PESA is green, environmentally friendly and biodegradable, and has good scale and corrosion inhibition and dispersion effects; the sodium formate solution promotes the stability of the system and the smooth progress of the reaction. Deionized water is added in two portions, effectively controlling the reaction process and improving product uniformity, and through the synergistic effect of each component, it provides an efficient and reliable solution for water treatment. At the same time, the flexible selection of various discharging methods further improves the convenience and practicality of production.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and specifically, to a high-efficiency scale and corrosion inhibitor and its preparation process. Background Art

[0002] In the process of rapid economic development and urban industrialization, the water treatment industry has emerged and continuously grown. The shortage of water resources and the enhancement of human environmental protection awareness have provided a strong driving force for the development of the water treatment industry and a broad market space. However, the current high global attention to environmental protection has brought some problems to the field of industrial water treatment. For example,

[0003] Traditional phosphorus-containing and nitrogen-containing scale inhibitors may cause environmental pollution. The phosphorus-containing components may lead to eutrophication of water bodies, causing excessive reproduction of aquatic organisms such as algae and destroying the water ecological balance. Nitrogen-containing substances may also be converted into environmentally harmful substances under certain conditions. Moreover, with the improvement of environmental protection requirements, their use is increasingly restricted, which is not conducive to the sustainable development of industrial water treatment;

[0004] At the same time, the scale inhibitor products currently on the market generally have problems such as poor performance and insufficient environmental protection. Poor performance makes it difficult to meet customer needs in effectively treating sewage and saving water. It may not be able to effectively prevent the precipitation and scaling of insoluble inorganic salts on the metal surface, and has limited protection for industrial equipment, resulting in low water treatment efficiency. Insufficient environmental protection may contain environmentally harmful components, which may have an adverse impact on the ecological environment during production, use, and discharge, thus reducing the practicality of high-efficiency scale and corrosion inhibitors.

[0005] In view of this, there is an urgent need for a high-efficiency scale and corrosion inhibitor with excellent performance and strong environmental protection and its preparation process to meet the sustainable development needs of the water treatment industry. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-efficiency scale and corrosion inhibitor and its preparation process to solve the problems raised in the above background art.

[0007] To achieve the above purpose, on the one hand, the present invention provides a preparation process for a high-efficiency scale and corrosion inhibitor, including the following steps:

[0008] S1. Material preparation: PBTC, 48% liquid caustic soda, deionized water, sodium formate solution, and PESA, as well as two clean reaction kettles, namely the first reaction kettle and the second reaction kettle;

[0009] S2. Operation of the first reactor: Add PBTC into the first reactor, start the stirring device to stir, then add 48% liquid caustic soda. And, monitor the pH value of the solution in real time. When the pH of the solution reaches 8.5 - 9.5, stop adding 48% liquid caustic soda. At this time, the obtained solution is marked as Solution No. 1 and placed aside for later use;

[0010] S3. Operation of the second reactor: Add deionized water for the first time in the second reactor, then add the sodium formate solution into the second reactor while stirring. After stirring until it is completely dissolved, add PESA and stir to make PESA completely dissolved;

[0011] S4. Subsequent operation: Add Solution No. 1 in the first reactor into the second reactor while stirring. After adding Solution No. 1, continue to stir for 10 min, then add deionized water for the second time in the second reactor and stir;

[0012] S5. Discharging and subsequent treatment: Finally, use one of the discharging methods of gravity discharging, pump discharging and pressure discharging to discharge the material to ensure the quality and stability of the product. Then, package and store the discharged product. It needs to be stored in an environment avoiding direct sunlight, high temperature and humidity. At the same time, conduct quality inspection on the product.

[0013] As a further improvement of this technical solution, in S2, the adding speed of PBTC is controlled at 4 L / min - 9 L / min.

[0014] As a further improvement of this technical solution, in S2, the stirring speed of the stirring device is 80 r / min - 160 r / min. If the stirring speed is too fast, the stirring time of the stirring device is 20 min - 30 min.

[0015] As a further improvement of this technical solution, in S2, the adding speed of 48% liquid caustic soda is controlled at 5 L / min - 16 L / min.

[0016] As a further improvement of this technical solution, in S3, the adding speed of deionized water for the first time is 60 L / h - 240 L / h.

[0017] As a further improvement of this technical solution, in S3, the adding speed of the sodium formate solution is 8 L / min - 22 L / min, the stirring speed is 60 r / min - 150 r / min, and the stirring time is 15 min - 30 min.

[0018] As a further improvement of this technical solution, in step S3, the addition rate of PESA is 7 g / min - 20 g / min, the stirring time after adding PESA is 10 min - 20 min, and the stirring speed is 90 r / min - 180 r / min.

[0019] As a further improvement of this technical solution, in step S4, the addition rate of the No. 1 solution is 9 L / min - 26 L / min, and the stirring speed is 60 r / min - 150 r / min.

[0020] As a further improvement of this technical solution, in step S4, the addition rate of deionized water for the second time is 60 L / h - 240 L / h. After adding deionized water, stirring continues for 30 min - 40 min.

[0021] On the other hand, the present invention provides a preparation process of an efficient scale and corrosion inhibitor using any one of the above, including the following raw materials:

[0022] The PBTC, the added mass accounts for 10% - 18% of the total mass;

[0023] The 48% liquid caustic soda, the added mass is 10% - 18% of the added mass of PBTC;

[0024] The deionized water, the mass added for the first time accounts for 25% - 35% of the total mass, and the mass added for the second time accounts for 20% - 28% of the total mass;

[0025] The sodium formate solution, the added mass accounts for 8% - 16% of the total mass;

[0026] The PESA, the added mass accounts for 12% - 20% of the total mass.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. In this efficient scale and corrosion inhibitor and its preparation method, by controlling the added mass of each raw material and operation parameters, the stability of product quality is improved. PBTC can effectively disperse insoluble inorganic salts, protect industrial equipment and improve water treatment efficiency; PESA is green, environmentally friendly and biodegradable, and has good scale inhibition, dispersion and corrosion inhibition effects; the sodium formate solution promotes the stability of the system and the smooth progress of the reaction. The deionized water is added in two times, effectively controlling the reaction process and improving the product uniformity. And through the synergistic effect of each component, it provides an efficient and reliable solution for water treatment. At the same time, the flexible selection of multiple discharging methods further improves the convenience and practicality of production.

[0029] 2. In the high-efficiency scale and corrosion inhibitor and its preparation method, by controlling the feeding rates of each raw material and the stirring parameters, not only the operation safety is ensured, but also the product quality is guaranteed. The pH value is adjusted with 48% liquid caustic soda to make the reaction proceed under suitable conditions. The synergistic effect of PESA and PBTC, as well as the assistance of sodium formate, endow the scale and corrosion inhibitor with excellent performance. The storage requirements of the product are clear, ensuring its stable performance, which helps to improve the utilization rate of water resources, reduce environmental pollution, and thus improve the quality of industrial production and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flowchart of the preparation method of the high-efficiency scale and corrosion inhibitor of the present invention;

[0031] Figure 2 It is a specific flowchart of the preparation method of the high-efficiency scale and corrosion inhibitor of the present invention;

[0032] Figure 3 It is a line graph of the data of experimental group A, control group A and control group E of the present invention;

[0033] Figure 4 It is a line graph of the data of experimental group B, control group B and control group F of the present invention;

[0034] Figure 5 It is a line graph of the data of experimental group C, control group C and control group G of the present invention;

[0035] Figure 6 It is a line graph of the data of experimental group D, control group D and control group H of the present invention;

[0036] Figure 7 It is a line graph of the data of experimental group A, experimental group B, experimental group C and experimental group D of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] An embodiment of the present invention provides a high-efficiency scale and corrosion inhibitor, including the following raw materials:

[0039] PBTC, with the added mass accounting for 10%-18% of the total mass. PBTC (2-phosphono-1,2,4-tricarboxylic butane) is a commonly used water treatment agent with good scale inhibition and corrosion inhibition properties. It can disperse the insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on the metal surface, and plays an important role in protecting industrial equipment and improving water treatment efficiency;

[0040] 48% liquid caustic soda is added in an amount of 10%-18% of the mass of PBTC added. 48% liquid caustic soda is a liquid sodium hydroxide (NaOH) solution, in which the mass of sodium hydroxide accounts for 48% of the total mass of the solution. Liquid caustic soda has strong alkalinity and corrosiveness. It can be used to adjust the pH value of the solution. However, during use, safety protection needs to be paid attention to avoid direct contact with the skin, eyes, etc. to prevent dangerous situations such as chemical burns;

[0041] Deionized water is added for the first time in an amount of 25%-35% of the total mass, mainly to dissolve the sodium formate solution. It is added for the second time in an amount of 20%-28% of the total mass to further dilute the reaction system and promote the full mixing of each component. By adding deionized water in different proportions in two times, the concentration and process of the reaction can be effectively controlled, and the uniformity of the reaction and the quality stability of the product can be improved;

[0042] Sodium formate solution is added in an amount of 8%-16% of the total mass. The sodium formate solution can promote the stability of the system and the smooth progress of the reaction. On the one hand, the sodium formate solution can cooperate with other raw materials to play a role, enhance the performance of the scale and corrosion inhibitor, and make it more effective in water treatment to disperse insoluble inorganic salts and prevent the precipitation and scaling of inorganic salts on the metal surface;

[0043] PESA is added in an amount of 12%-20% of the total mass. PESA (polyepoxysuccinic acid) is a phosphorus-free and nitrogen-free green environmental protection type water treatment agent. PESA has good scale inhibition and dispersion performance and corrosion inhibition effect. In water treatment, it can effectively disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on the metal surface, is environmentally friendly and biodegradable.

[0044] According to Figure 1 and Figure 2 As shown, the embodiment of the present invention also provides a preparation process for preparing the above-mentioned high-efficiency scale and corrosion inhibitor, including the following steps:

[0045] Step 1. Material preparation: PBTC, 48% liquid caustic soda, deionized water, sodium formate solution and PESA, and two clean reaction kettles, namely the first reaction kettle and the second reaction kettle;

[0046] Step 2. Operation of the first reactor: Add PBTC into the interior of the first reactor. Control the addition rate of PBTC at 4 L / min - 9 L / min. If the addition rate is too fast, problems such as uneven stirring, excessive foaming, or local overheating may occur. If the addition rate is too slow, it will affect the production efficiency and also the contact and mixing effect between PBTC and other components in the reactor, thus affecting the uniformity of mixing. Start the stirring device for stirring. The stirring speed of the stirring device is 80 r / min - 160 r / min. If the stirring speed is too fast, excessive foaming and splashing may occur, affecting the operation safety and product quality. If the stirring speed is too slow, the mixing effect of PBTC will be reduced. The stirring time of the stirring device is 20 min - 30 min. Then add 48% liquid caustic soda. Control the addition rate of 48% liquid caustic soda at 5 L / min - 16 L / min. And, monitor the pH value of the solution in real time. When the pH of the solution reaches 8.5 - 9.5, stop adding 48% liquid caustic soda. At this time, the obtained solution is marked as Solution No. 1 and set aside for later use;

[0047] Step 3. Operation of the second reactor: Add deionized water for the first time in the second reactor. The speed of the first addition of deionized water is 60 L / h - 240 L / h. If the addition speed is too fast, splashing and impact may occur, affecting operation safety and product quality. At the same time, too fast an addition speed will cause uneven mixing of the solution, affecting the dissolution effect of other subsequent components. If the addition speed is too slow, in addition to prolonging the production time and reducing efficiency, it will also result in an overly long stirring process, increasing energy consumption, and being easily interfered by external factors, affecting the stability of product quality. Then add the sodium formate solution into the second reactor. The addition speed of the sodium formate solution is 8 L / min - 22 L / min. Stir while adding, and the stirring speed is 60 r / min - 150 r / min, which can ensure the full mixing of the sodium formate solution and avoid local overheating. The stirring time is 15 min - 30 min, which can ensure the complete dissolution of sodium formate. Then observe the state of the solution to ensure that there are no undissolved particles or precipitates. After stirring until completely dissolved, add PESA. The addition speed of PESA is 7 g / min - 20 g / min. If the addition speed is too fast, it is easy to cause PESA to agglomerate or adhere to the reactor wall. In addition, it may also cause PESA not to fully contact with other components in the solution, affecting the stability and consistency of product performance. If the addition speed is too slow, it will prolong the production time and reduce production efficiency, and may also increase the uncertainty during the production process, such as being more easily affected by external environmental factors such as temperature changes and dust pollution, thus affecting product quality. And stir for 10 min - 20 min, and the stirring speed is 90 r / min - 180 r / min. On the one hand, it can ensure the full dispersion of PESA in the solution, avoiding agglomeration and adhesion to the reactor wall; on the other hand, it can fully contact with other components in the solution, improving the stability and consistency of product performance. At the same time, controlling the stirring speed can also balance production efficiency and product quality, avoiding various problems caused by improper stirring speed and making PESA completely dissolve. During the stirring process, regularly check the uniformity and transparency of the solution to ensure that PESA is fully dispersed in the solution;

[0048] Step 4. Subsequent operations: Add the No. 1 solution in the first reactor into the second reactor. The addition speed of the No. 1 solution is 9 L / min - 26 L / min. Stir while adding, and the stirring speed is 60 r / min - 150 r / min. After adding the No. 1 solution, continue to stir for 10 min to ensure the full mixing of each component. Then add deionized water for the second time in the second reactor. The addition speed of the second addition of deionized water is 60 L / h - 240 L / h, and stir continuously for 30 min - 40 min;

[0049] Step Five: Discharging and Subsequent Treatment: Finally, one of the discharging methods, namely gravity discharging, pump discharging, or pressure discharging, is adopted to ensure the quality and stability of the product. If gravity discharging is used, taking advantage of the height difference between the reaction kettle and the storage container, by opening the discharging valve at the bottom of the reaction kettle, the product slowly flows out under the action of gravity. This method is relatively simple and low-cost, but the opening degree of the valve needs to be controlled to ensure the discharging speed. The initial opening degree is between 10% - 18%, and then adjusted by 2% - 6% according to the actual discharging situation. The discharging speed is between 6L / min - 15L / min to avoid the impact or splashing caused by too fast discharging, which may affect the quality and stability of the product. If pump discharging is used, a corrosion-resistant chemical pump is used for discharging, and the discharging speed is controlled by adjusting the rotation speed of the pump. For small pumps, the rotation speed is controlled between 500r / min - 1000r / min, and for larger pumps, the rotation speed is controlled between 800r / min - 1500r / min to ensure smooth discharging. When using pump discharging, attention should be paid to the compatibility between the pump and the product to avoid pollution of the product by the pump material. If pressure discharging is used, an inert gas such as compressed air or nitrogen is used to apply a certain pressure to the reaction kettle to extrude the product from the reaction kettle. This method requires the installation of a pressure control device to ensure stable pressure. The pressure is controlled between 0.1MPa - 0.5MPa. For small reaction kettles and products with low viscosity, the pressure is controlled between 0.1MPa - 0.3MPa, and for large reaction kettles or products with high viscosity, the pressure is controlled between 0.3MPa - 0.5MPa to improve the safety of use. At the same time, attention should be paid to preventing gas from mixing into the product and affecting the quality. Then, the discharged product is packaged and stored, and it needs to be stored in an environment avoiding direct sunlight, high temperature, and humidity. At the same time, quality inspection of the product is carried out.

[0050] In the present invention, first, PBTC is added to the first reaction kettle, stirring is started, and 48% liquid caustic soda is added to adjust the pH value to obtain Solution No. 1. Then, deionized water, sodium formate solution, and PESA are successively added to the second reaction kettle, and Solution No. 1 is added to the second reaction kettle. Finally, discharging and subsequent treatment are carried out. This can not only fully mix all raw materials to ensure the quality stability of the product, but also enable each component to play a synergistic role, enhancing the performance of the scale and corrosion inhibitor. For example, PBTC can disperse the insoluble inorganic salts in water, preventing or interfering with the precipitation and scaling of inorganic salts on the metal surface; the sodium formate solution can promote the stability of the system and the smooth progress of the reaction; PESA has good scale inhibition and dispersion performance and corrosion inhibition effect, is environmentally friendly and biodegradable, and can also effectively enhance the protection of industrial equipment and the water treatment efficiency.

[0051] Moreover, PESA mainly plays a dispersing and corrosion-inhibiting role on insoluble inorganic salts through functional groups such as carboxyl groups in its molecular structure, preventing the precipitation and scaling of inorganic salts on the metal surface; the sodium formate solution mainly plays an auxiliary role in promoting the stability of the system and the smooth progress of the reaction; the coexistence of PESA, PBTC, sodium formate, etc. synergistically exerts the scale and corrosion inhibition effect. Deionized water mainly serves as a solvent. By adding deionized water in different proportions in two times, the concentration and process of the reaction are effectively controlled, the uniformity of the reaction and the stability of the product quality are improved. Then, PBTC (2-phosphonobutane-1,2,4-tricarboxylic acid) reacts with 48% liquid caustic soda (NaOH). Reaction mechanism: The phosphonic acid group and carboxylic acid group in PBTC undergo a neutralization reaction with sodium hydroxide under alkaline conditions; Chemical reaction formula: PBTC + nNaOH → the sodium salt of PBTC + nH2O (n is the number of moles of sodium hydroxide required for neutralization);

[0052] By controlling the added mass of each raw material and operating parameters, the stability of the product quality is improved. PBTC can effectively disperse insoluble inorganic salts, protect industrial equipment and improve water treatment efficiency; PESA is green, environmentally friendly and biodegradable, and has good scale and corrosion inhibition and dispersing effects; the sodium formate solution promotes the stability of the system and the smooth progress of the reaction. Deionized water is added in two times, effectively controlling the reaction process and improving the product uniformity, and through the synergistic effect of each component, it provides an efficient and reliable solution for water treatment. At the same time, the flexible selection of various discharging methods further improves the convenience and practicality of production.

[0053] During the preparation process, the feeding speed of each raw material and stirring parameters are controlled, which not only ensures operation safety but also ensures product quality. 48% liquid caustic soda adjusts the pH value to make the reaction proceed under suitable conditions. The synergistic effect of PESA and PBTC, as well as the assistance of sodium formate, make the scale and corrosion inhibitor have excellent performance. The product storage requirements are clear to ensure its stable performance, which helps to improve water resource utilization rate and reduce environmental pollution, thus improving the quality of industrial production and environmental protection.

[0054] According to different raw material dosages, the following specific examples are used to further illustrate the high-efficiency scale and corrosion inhibitor provided by the present invention.

[0055] Example 1

[0056] Dosage of raw materials: PBTC accounts for 15% of the total mass, 48% liquid caustic soda is 15% of the added mass of PBTC, the mass of deionized water added for the first time accounts for 30% of the total mass, the mass added for the second time accounts for 20% of the total mass, the sodium formate solution accounts for 12% of the total mass, and PESA accounts for 20% of the total mass;

[0057] Operating parameters: PBTC addition rate 6 L / min, liquid caustic soda addition rate 10 L / min, stirring speed of the first reaction kettle 120 r / min, stirring time 25 min; deionized water first addition rate 150 L / h, sodium formate solution addition rate 15 L / min, stirring speed 120 r / min, stirring time 25 min; PESA addition rate 15 g / min, stirring speed 150 r / min, stirring time 15 min; No. 1 solution addition rate 15 L / min, stirring speed 120 r / min; second deionized water addition rate 150 L / h, stirring time 35 min, discharging by gravity discharging, initial valve opening 15%, discharging speed 10 L / min.

[0058] Example 2

[0059] Raw material dosage: PBTC accounts for 16% of the total mass, 48% liquid caustic soda is 18% of the mass of PBTC added, deionized water first addition mass accounts for 25% of the total mass, second addition mass accounts for 27% of the total mass, sodium formate solution accounts for 14% of the total mass, PESA accounts for 16% of the total mass;

[0060] Operating parameters: PBTC addition rate 7 L / min, liquid caustic soda addition rate 12 L / min, stirring speed of the first reaction kettle 140 r / min, stirring time 28 min; deionized water first addition rate 180 L / h, sodium formate solution addition rate 18 L / min, stirring speed 130 r / min, stirring time 28 min; PESA addition rate 18 g / min, stirring speed 160 r / min, stirring time 18 min; No. 1 solution addition rate 18 L / min, stirring speed 130 r / min; second deionized water addition rate 180 L / h, stirring time 38 min; discharging by pump discharging, small pump rotation speed.

[0061] Example 3

[0062] Raw material dosage: PBTC accounts for 18% of the total mass, 48% liquid caustic soda is 12% of the mass of PBTC added, deionized water first addition mass accounts for 26% of the total mass, second addition mass accounts for 26% of the total mass, sodium formate solution accounts for 10% of the total mass, PESA accounts for 18% of the total mass;

[0063] Operating parameters: PBTC addition rate 5 L / min, liquid caustic soda addition rate 8 L / min, stirring speed of the first reaction kettle 100 r / min, stirring time 22 min; deionized water first addition rate 120 L / h, sodium formate solution addition rate 12 L / min, stirring speed 100 r / min, stirring time 22 min; PESA addition rate 12 g / min, stirring speed 130 r / min, stirring time 12 min; No. 1 solution addition rate 12 L / min, stirring speed 100 r / min; second deionized water addition rate 120 L / h, stirring time 32 min; discharging is carried out by pressure discharging, and the pressure is controlled at 0.2 MPa.

[0064] Example 4

[0065] Dosage of raw materials: PBTC accounts for 12% of the total mass, 48% liquid caustic soda is 16% of the mass of PBTC added, the mass of deionized water added for the first time accounts for 32% of the total mass, the mass added for the second time accounts for 26% of the total mass, sodium formate solution accounts for 16% of the total mass, and PESA accounts for 12% of the total mass;

[0066] Operating parameters: PBTC addition rate 8 L / min, liquid caustic soda addition rate 14 L / min, stirring speed of the first reaction kettle 150 r / min, stirring time 26 min; deionized water first addition rate 200 L / h, sodium formate solution addition rate 16 L / min, stirring speed 140 r / min, stirring time 26 min; PESA addition rate 16 g / min, stirring speed 170 r / min, stirring time 16 min; No. 1 solution addition rate 16 L / min, stirring speed 140 r / min; second deionized water addition rate 200 L / h, stirring time 36 min; discharging is carried out by combining gravity discharging and pump discharging. First, gravity discharge to a certain extent and then use the pump to discharge, and the pump speed is 1000 r / min.

[0067] Table 1 Dosage of each raw material in Examples 1 - 4

[0068]

[0069]

[0070] In order to verify that the high - efficiency scale and corrosion inhibitor prepared in the examples of the present invention has good stability and high efficiency, the high - efficiency scale and corrosion inhibitor provided in the examples of the present invention will be described through the following test examples.

[0071] Test example

[0072] The purpose of this test group is to explore the influence of different component ratios on the stability and high efficiency of the high - efficiency scale and corrosion inhibitor.

[0073] Test objective: To detect the scale inhibition rate, corrosion inhibition property, stability, dispersibility, biodegradability rate and environmental friendliness of the high-efficiency scale and corrosion inhibitor material of the present invention.

[0074] Test method: The experimental groups A, B, C and D respectively adopt the component ratios of the wastewater treatment materials provided in Examples 1-4; the control examples adopt the control groups A, B, C, D, E, F, G and H, where:

[0075] Control group A

[0076] Dosage of raw materials: PBTC accounts for 18% of the total mass, the mass of deionized water added for the first time accounts for 28% of the total mass, the mass added for the second time accounts for 22% of the total mass, the sodium formate solution accounts for 13% of the total mass, PESA accounts for 19% of the total mass, but 48% liquid caustic soda is not added;

[0077] The operating parameters are the same as those in Example 1.

[0078] Control group B

[0079] Dosage of raw materials: PBTC accounts for 15% of the total mass, 48% liquid caustic soda is 17% of the mass of PBTC added, the mass of deionized water added for the first time accounts for 36% of the total mass, the mass added for the second time accounts for 31% of the total mass, PESA accounts for 15% of the total mass; but the sodium formate solution is not added;

[0080] The operating parameters are the same as those in Example 2.

[0081] Control group C

[0082] Dosage of raw materials: PBTC accounts for 20% of the total mass, 48% liquid caustic soda is 13% of the mass of PBTC added, the mass of deionized water added for the first time accounts for 24% of the total mass, the mass added for the second time accounts for 21% of the total mass, the sodium formate solution accounts for 11% of the total mass, PESA accounts for 23% of the total mass;

[0083] The operating parameters are the same as those in Example 3.

[0084] Control group D

[0085] Dosage of raw materials: PBTC accounts for 8% of the total mass, 48% liquid caustic soda is 8% of the mass of PBTC added, the mass of deionized water added for the first time accounts for 33% of the total mass, the mass added for the second time accounts for 23% of the total mass, the sodium formate solution accounts for 17% of the total mass, PESA accounts for 18% of the total mass;

[0086] The operating parameters are the same as those in Example 4.

[0087] Control group E

[0088] The dosage of raw materials is the same as that in Example 1;

[0089] The operating parameters are the same as those in Example 1, but the addition rates of PBTC, liquid caustic soda, deionized water in the first addition, sodium formate solution, PESA, solution No. 1, and deionized water in the second addition are not considered. The discharging is carried out by pressure discharging, but no pressure control device is installed.

[0090] Control Group F

[0091] The raw material dosages are the same as those in Example 2;

[0092] The operating parameters are the same as those in Example 2, but the stirring time and stirring speed are not controlled.

[0093] Control Group G

[0094] The raw material dosages are the same as those in Example 3;

[0095] The operating parameters are the same as those in Example 3, but the addition order of each raw material is disrupted.

[0096] Operating parameters.

[0097] Control Group H

[0098] The raw material dosages are the same as those in Example 4, but the addition of deionized water in the second addition is not carried out;

[0099] The operating parameters are the same as those in Example 4, but the addition of deionized water in the second addition is not carried out, and the discharging parameters are not controlled.

[0100] The specific detection indexes are shown in Table 2.

[0101] Table 2 Detection Indexes of Each Sample

[0102] Scale inhibition rate % Corrosion inhibition % Stability % Dispersion % Biodegradability rate % Environmental protection % Test group A 90 80 93 85 90 92 Test group B 86 76 90 83 88 90 Test group C 84 72 88 80 85 86 Test group D 80 70 85 78 82 81 Control group A 62 50 65 63 70 68 Control group B 64 56 68 65 72 74 Control group C 70 60 74 68 78 78 Control group D 65 52 64 58 68 72 Control group E 58 46 58 52 63 65 Control group F 69 58 62 60 75 76 Control group G 61 50 66 62 70 70 Control group H 58 45 56 54 67 68

[0103] According to Figure 3 - Figure 7 and as shown in Table 2, for the above comparison data, it can be seen that:

[0104] Test Groups A - D (Examples 1 - 4) are significantly superior to the control groups in all detection indexes. The scale inhibition rate, corrosion inhibition property, stability, dispersibility, biodegradability rate, and environmental friendliness of the test groups are all relatively high, and the indexes of Test Group A are the most prominent; while in the control groups, due to different degrees of omission or change in raw materials or operating parameters, their performance has decreased significantly. For example, in Control Group A, 48% liquid caustic soda is not added, resulting in a significant reduction in all performance indexes; in Control Group E, the addition rates of each raw material are not considered and no pressure control device is installed for discharging, and the performance is also greatly affected; in Control Group H, the addition of deionized water in the second addition is not carried out and the discharging is random, and its performance is also at a relatively low level among the control groups.

[0105] It can be seen that the high-efficiency scale inhibitor and corrosion inhibitor provided by the embodiments of the present invention and its preparation process have remarkable effects. By controlling operation parameters such as the dosage and addition rate of each raw material, stirring parameters, and discharging method, the quality and performance of the product can be effectively improved. Each component acts synergistically. PBTC disperses insoluble inorganic salts, PESA plays a good role in scale and corrosion inhibition and dispersion and is green, environmentally friendly, and biodegradable. The sodium formate solution promotes the stability of the system and the smooth progress of the reaction, and deionized water effectively controls the reaction process and improves the uniformity of the product.

[0106] Based on the above, it can be seen that the data of experimental group A (Example 1) are the best. Because among all the detection indexes, the scale inhibition rate of experimental group A reaches 90%, the corrosion inhibition property is 80%, the stability is 93%, the dispersion property is 85%, the biodegradation rate is 90%, and the environmental friendliness is 92%, all of which are at a relatively high level. Prepared according to the specified raw material dosage and operation parameters, it improves the stability and efficiency of the product quality. The synergistic effect of each component is exerted most fully, and it can provide the most reliable and efficient solution for water treatment.

[0107] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation process of an efficient scale inhibitor and corrosion inhibitor, characterized in that, It includes the following steps: S1. Material preparation: PBTC, 48% liquid caustic soda, deionized water, sodium formate solution and PESA, as well as two clean reaction kettles, namely the first reaction kettle and the second reaction kettle; S2. Operation of the first reaction kettle: Add PBTC into the first reaction kettle, turn on the stirring device to stir, then add 48% liquid caustic soda, and monitor the pH value of the solution in real time. When the pH of the solution reaches 8.5 - 9.5, stop adding 48% liquid caustic soda. At this time, the obtained solution is marked as Solution No. 1 and placed aside for later use; S3. Operation of the second reaction kettle: Add deionized water for the first time in the second reaction kettle, then add the sodium formate solution into the second reaction kettle, stir while adding, and continue to stir until it is completely dissolved. Then add PESA and stir to make PESA completely dissolved; S4. Subsequent operation: Add Solution No. 1 in the first reaction kettle into the second reaction kettle, stir while adding. After adding Solution No. 1, continue to stir for 10 min, then add deionized water for the second time in the second reaction kettle and stir; S5. Discharging and subsequent treatment: Finally, use one of the discharging methods of gravity discharging, pump discharging and pressure discharging to discharge the material to ensure the quality and stability of the product. Then package and store the discharged product. It needs to be stored in an environment avoiding direct sunlight, high temperature and humidity. At the same time, conduct quality inspection on the product; In S2, the adding speed of PBTC is controlled at 4 L / min - 9 L / min; the adding speed of 48% liquid caustic soda is controlled at 5 L / min - 16 L / min, the stirring speed of the stirring device is 80 r / min - 160 r / min, and the stirring time of the stirring device is 20 min - 30 min; In S3, the adding speed of deionized water for the first time is 60 L / h - 240 L / h; the adding speed of the sodium formate solution is 8 L / min - 22 L / min; the adding speed of PESA is 7 g / min - 20 g / min. The stirring speed when adding the sodium formate solution while stirring is 60 r / min - 150 r / min, the stirring time is 15 min - 30 min, the stirring time after adding PESA is 10 min - 20 min, and the stirring speed is 90 r / min - 180 r / min; In S4, the adding speed of Solution No. 1 is 9 L / min - 26 L / min; the adding speed of deionized water for the second time is 60 L / h - 240 L / h. After adding deionized water, continue to stir for 30 min - 40 min; For the PBTC added, the added mass accounts for 10% - 18% of the total mass; For the 48% liquid caustic soda added, the added mass accounts for 10% - 18% of the added mass of PBTC; For the deionized water, the added mass for the first time accounts for 25% - 35% of the total mass, and the added mass for the second time accounts for 20% - 28% of the total mass; For the sodium formate solution added, the added mass accounts for 8% - 16% of the total mass; For the PESA added, the added mass accounts for 12% - 20% of the total mass.

2. An efficient scale and corrosion inhibitor, characterized in that, The high-efficiency scale and corrosion inhibitor prepared by the preparation process described in claim 1 comprises the following raw materials: The PBTC is added in an amount of 10%-18% by mass of the total mass; The 48% liquid caustic soda is added in an amount of 10%-18% by mass of the mass of the added PBTC; The deionized water is added for the first time in an amount of 25%-35% by mass of the total mass and for the second time in an amount of 20%-28% by mass of the total mass; The sodium formate solution is added in an amount of 8%-16% by mass of the total mass; The PESA is added in an amount of 12%-20% by mass of the total mass.

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