Efficient scale and corrosion inhibitor and preparation process thereof

Abstract

The invention relates to the technical field of water treatment, in particular to an efficient scale and corrosion inhibitor and a preparation process thereof. The method comprises the following steps: 1, preparing materials; step 2, operating a first reaction kettle; step 3, operation of a second reaction kettle; step 4, performing subsequent operation; according to the efficient scale and corrosion inhibitor and the preparation method thereof, the adding quality and operation parameters of all the raw materials are controlled, the stability of the product quality is improved, PBTC can effectively disperse insoluble inorganic salt, industrial equipment is protected, and the water treatment efficiency is improved; pESA is green, environment-friendly and biodegradable, and has good scale dispersion and corrosion inhibition effects; the sodium formate solution promotes system stability and smooth reaction, the deionized water is added twice, the reaction process is effectively controlled, the product uniformity is improved, an efficient and reliable solution is provided for water treatment through the synergistic effect of all the components, meanwhile, multiple discharging modes are flexibly selected, and the production cost is reduced. And the convenience and the practicability of production are further improved.

Description

Technical Field

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

[0002] In the process of rapid economic development and urban industrialization, the water treatment industry has emerged and continued to grow. The shortage of water resources and the increase in human environmental awareness have provided a strong driving force for the development of the water treatment industry and a broad market space. However, the current global emphasis on environmental protection has caused the industrial water treatment field to face some problems, such as:

[0003] Traditional phosphorus- and nitrogen-containing scale inhibitors may pollute the environment. Phosphorus-containing components may cause 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 substances that are harmful to the environment under certain conditions. With the improvement of environmental protection requirements, their use is subject to more and more restrictions, which is not conducive to the sustainable development of industrial water treatment.

[0004] At the same time, 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 terms of effective sewage treatment and water conservation. They may not be able to effectively prevent the precipitation and scaling of insoluble inorganic salts on metal surfaces, have limited protective effects on industrial equipment, and have low water treatment efficiency. Insufficient environmental protection may contain ingredients that are harmful to the environment, and may have adverse effects on the ecological environment during production, use and discharge, thereby reducing the practicality of high-efficiency scale and corrosion inhibitors.

[0005] In view of this, there is an urgent need for an efficient 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 highly effective scale and corrosion inhibitor and a preparation process thereof, so as to solve the problems raised in the above background technology.

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

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

[0009] S2, operation of the first reactor: PBTC is added into the first reactor, the stirring device is turned on for stirring, and then 48% of liquid alkali is added, and the pH value of the solution is monitored in real time. When the pH value of the solution reaches 8.5-9.5, the addition of 48% of liquid alkali is stopped. At this time, the obtained solution is marked as solution No. 1 and is placed aside for use;

[0010] S3, operation of the second reactor: add deionized water into the second reactor for the first time, then add the sodium formate solution into the second reactor, stir while adding, and after stirring until it is completely dissolved, add PESA and stir until PESA is completely dissolved;

[0011] S4, subsequent operation: adding solution No. 1 in the first reactor to the second reactor, stirring while adding, and continuing to stir for 10 minutes after adding solution No. 1, and then adding deionized water to the second reactor for the second time and stirring;

[0012] S5. Discharging and subsequent processing: Finally, use one of the discharging methods, such as gravity discharging, pump discharging and pressure discharging, to ensure the quality and stability of the product. The discharged product is then packaged and stored in an environment that avoids direct sunlight, high temperature and humidity. At the same time, the product is quality tested.

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

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

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

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

[0017] As a further improvement of the technical solution, in S3, the rate of adding 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 the technical solution, in S3, the speed of adding 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 the technical solution, in S4, the speed of adding solution No. 1 is 9 L / min-26 L / min, and the stirring speed is 60 r / min-150 r / min.

[0020] As a further improvement of the technical solution, in S4, the speed of adding deionized water for the second time is 60L / h-240L / h, and after adding the deionized water, stirring is continued for 30min-40min.

[0021] On the other hand, the present invention provides a preparation process of a high-efficiency scale and corrosion inhibitor using any one of the above, comprising the following raw materials:

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

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

[0024] The deionized water is added in an amount of 25% to 35% of the total mass for the first time and 20% to 28% of the total mass for the second time;

[0025] The sodium formate solution is added in an amount of 8% to 16% of the total mass;

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

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the high-efficiency scale inhibitor and preparation method thereof, the stability of product quality is improved by controlling the addition quality of each raw material and the operating parameters. 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 dispersing and corrosion inhibition effects; sodium formate solution promotes system stability and smooth reaction, and deionized water is added twice to effectively control the reaction process and improve product uniformity. The synergistic effect of various components provides an efficient and reliable solution for water treatment. At the same time, the flexible choice of multiple discharging methods further improves the convenience and practicality of production.

[0029] 2. In the high-efficiency scale inhibitor and preparation method thereof, the addition rate and stirring parameters of each raw material are controlled to ensure both operational safety and product quality. The pH value is adjusted by 48% liquid alkali so that the reaction can proceed under suitable conditions. The synergistic effect of PESA and PBTC, as well as the assistance of sodium formate, make the scale inhibitor have excellent performance. The product storage requirements are clear to ensure its stable performance, which helps to improve the utilization rate of water resources and reduce environmental pollution, thereby improving the quality of industrial production and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 2 The specific flow chart 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 the test group A, the control group A and the control group E of the present invention;

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

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

[0035] Figure 6 It is a data line graph of the test group D, the control group D and the 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

[0037] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

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

[0039] PBTC, the added mass accounts for 10%-18% of the total mass. PBTC (2-phosphono-1,2,4-tricarboxylic acid butane) is a commonly used water treatment agent with good scale and corrosion inhibition properties. It can disperse the sparingly soluble inorganic salts in water, prevent or interfere with the precipitation and scaling of sparingly soluble 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, the added mass is 10%-18% of the added mass of PBTC. 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 is highly alkaline and corrosive. It can be used to adjust the pH value of the solution. However, safety protection should be paid attention to during use to avoid direct contact with the skin, eyes, etc. to prevent dangerous situations such as chemical burns;

[0041] Deionized water, the first addition accounts for 25%-35% of the total mass, mainly to dissolve the sodium formate solution, and the second addition accounts for 20%-28% of the total mass to further dilute the reaction system and promote the full mixing of the components. By adding deionized water in different proportions twice, the concentration and progress 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, the added mass accounts for 8%-16% of the total mass. Sodium formate solution can promote the stability of the system and the smooth progress of the reaction. On the one hand, sodium formate solution can work synergistically with other raw materials to enhance the performance of scale inhibitors and corrosion inhibitors, so that they can more effectively disperse insoluble inorganic salts in water treatment and prevent inorganic salts from precipitating and scaling on the metal surface;

[0043] PESA, added mass accounts for 12%-20% of the total mass. PESA (polyepoxysuccinic acid) is a phosphorus-free, nitrogen-free, green and environmentally friendly water treatment agent. PESA has good scale inhibition and dispersibility and corrosion inhibition. In water treatment, it can effectively disperse the insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on the metal surface, and 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, comprising the following steps:

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

[0046] Step 2, operation of the first reactor: PBTC is added to the interior of the first reactor, and the speed of PBTC addition is controlled at 4L / min-9L / min. If the addition speed is too fast, it will cause uneven stirring, excessive foam or local overheating. If the addition speed is too slow, it will affect the production efficiency and the contact and mixing effect of PBTC with other components in the reactor, thereby affecting the uniformity of mixing. Turn on the stirring device for stirring. The stirring speed of the stirring device is 80r / min-160r / min. If the stirring speed is too fast, excessive foam and splashing may be generated, affecting operational 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 20min-30min, and then 48% liquid alkali is added. The speed of 48% liquid alkali addition is controlled at 5L / min-16L / min, and the pH value of the solution is monitored in real time. When the pH of the solution reaches 8.5-9.5, stop adding 48% liquid alkali. At this time, the obtained solution is marked as solution No. 1 and is placed aside for use;

[0047] Step 3, operation of the second reactor: deionized water is added for the first time in the second reactor at a rate of 60L / h-240L / h. If the addition speed is too fast, splashing and impact may occur, affecting operational safety and product quality. At the same time, too fast an addition speed will cause uneven mixing of the solution, affecting the subsequent dissolution effect of other ingredients. If the addition speed is too slow, in addition to extending the production time and reducing efficiency, the stirring process will be too long, increasing energy consumption, and being easily disturbed by external factors, affecting product quality stability. Then, the sodium formate solution is added to the interior of the second reactor at a rate of 8L / min-22L / min. Stirring is performed while adding at a rate of 60r / min-150r / min, which can ensure that the sodium formate solution is fully mixed and avoid local overheating. The stirring time is 15min-30min, which can ensure that the sodium formate is completely dissolved. Then observe the state of the solution to ensure that there are no undissolved particles or precipitation. After stirring until completely dissolved, PESA is added at a rate of 7g / m in-20g / min. If the addition speed is too fast, it is easy to cause PESA to agglomerate or adhere to the wall of the reactor, and it may also prevent PESA from fully contacting with other components in the solution, affecting the stability and consistency of product performance. If the addition speed is too slow, the production time will be extended, the production efficiency will be reduced, and the uncertainty in the production process may be increased. For example, it is more susceptible to external environmental factors such as temperature changes, dust pollution, etc., thereby affecting product quality. Stirring is performed with a stirring time of 10min-20min and a stirring speed of 90r / min-180r / min. On the one hand, it can ensure that PESA is fully dispersed in the solution to avoid agglomeration and adhesion to the wall of the reactor; on the other hand, it can fully contact with other components in the solution to improve the stability and consistency of product performance. At the same time, controlling the stirring speed can also balance production efficiency and product quality, avoid various problems caused by improper stirring speed, and make PESA completely dissolved. 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 operation: add solution No. 1 in the first reactor to the second reactor, the speed of adding solution No. 1 is 9L / min-26L / min, the stirring speed is 60r / min-150r / min, and stirring is performed while adding. After adding solution No. 1, continue stirring for 10 minutes to ensure that all ingredients are fully mixed, and then add deionized water to the second reactor for the second time. The speed of adding deionized water for the second time is 60L / h-240L / h, and stirring is performed. Continue stirring for 30min-40min;

[0049] Step 5. Discharging and subsequent processing: Finally, use one of the discharging methods, such as gravity discharging, pump discharging and pressure discharging, to ensure the quality and stability of the product. If gravity discharging is used, take advantage of the height difference between the reactor and the storage container, open the discharging valve at the bottom of the reactor, and let the product flow out slowly under the action of gravity. This method is relatively simple and low-cost, but the valve opening needs to be controlled to ensure the discharging speed. The initial opening is 10%-18%, and then adjusted by 2%-6% according to the actual discharging situation. The discharging speed is 6L / min-15L / min to avoid impact or splashing caused by too fast discharging that affects the quality and stability of the product. If pump discharging is used, use a corrosion-resistant chemical pump for discharging, and control the discharging speed by adjusting the pump speed. For small pumps, the speed is controlled at 500r / min-1000r / min, and for larger ones, the speed control is 200r / min-1500r / min. At 800r / min-1500r / min, ensure smooth discharging. When using a pump to discharging, pay attention to the compatibility of the pump and the product to avoid contamination of the product by the material of the pump. If pressure discharging is used, compressed air or inert gases such as nitrogen can be used to apply a certain pressure to the reactor to squeeze the product out of the reactor. This method requires the installation of a pressure control device to ensure pressure stability and control the pressure at 0.1MPa-0.5MPa. For small reactors and low-viscosity products, the pressure is controlled at 0.1MPa-0.3MPa. For large reactors or high-viscosity products, the pressure is controlled at 0.3MPa-0.5MPa to improve safety of use. At the same time, pay attention to prevent gas from mixing into the product and affecting quality. The discharged products are then packaged and stored in an environment that avoids direct sunlight, high temperature and humidity, and at the same time, the product is quality tested.

[0050] In the present invention, firstly, PBTC is added to the first reactor, stirring is started, and 48% of liquid alkali is added to adjust the pH value to obtain solution No. 1, then deionized water, sodium formate solution, and PESA are added to the second reactor in sequence, and solution No. 1 is added to the second reactor, and finally the material is discharged and the subsequent treatment is performed, which can not only fully mix the raw materials to ensure the quality stability of the product, but also enable the various components to work synergistically to enhance the performance of the scale and corrosion inhibitor, such as PBTC can disperse the sparingly soluble inorganic salts in water, prevent or interfere with the precipitation and scaling of inorganic salts on the metal surface; sodium formate solution can promote the stability of the system and the smooth progress of the reaction; PESA has good scale inhibition and dispersing performance and corrosion inhibition, is environmentally friendly and biodegradable, and can also effectively improve the protection of industrial equipment and water treatment efficiency;

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

[0052] By controlling the addition quality and operating parameters of each raw material, 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 dispersion and corrosion inhibition effects; sodium formate solution promotes system stability and smooth reaction. Deionized water is added twice to effectively control the reaction process and improve product uniformity. Through the synergistic effect of various components, it provides an efficient and reliable solution for water treatment. At the same time, the flexible choice of multiple discharging methods further improves the convenience and practicality of production.

[0053] During the preparation process, the addition rate and stirring parameters of each raw material are controlled to ensure both operational safety and product quality. 48% liquid alkali is used to adjust the pH value so that the reaction can proceed under suitable conditions. The synergistic effect of PESA and PBTC, as well as the assistance of sodium formate, make the scale inhibitor and corrosion inhibitor have excellent performance. The product storage requirements are clear to ensure its stable performance, which helps to improve the utilization rate of water resources and reduce environmental pollution, thereby improving the quality of industrial production and environmental protection.

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

[0055] Example 1

[0056] Raw material dosage: PBTC accounts for 15% of the total mass, 48% liquid caustic soda accounts for 15% of the added mass of PBTC, the first added mass of deionized water accounts for 30% of the total mass, the second added mass 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] Operation parameters: PBTC addition rate 6L / min, liquid alkali addition rate 10L / min, first reactor stirring speed 120r / min, stirring time 25min; first deionized water addition rate 150L / h, sodium formate solution addition rate 15L / min, stirring speed 120r / min, stirring time 25min; PESA addition rate 15g / min, stirring speed 150r / min, stirring time 15min; No. 1 solution addition rate 15L / min, stirring speed 120r / min; second deionized water addition rate 15L / h, stirring time 35min, discharging adopts gravity discharging, initial valve opening 15%, discharging rate 10L / min.

[0058] Example 2

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

[0060] Operation parameters: PBTC addition rate 7L / min, liquid alkali addition rate 12L / min, first reactor stirring speed 140r / min, stirring time 28min; first deionized water addition rate 180L / h, sodium formate solution addition rate 18L / min, stirring speed 130r / min, stirring time 28min; PESA addition rate 18g / min, stirring speed 160r / min, stirring time 18min; No. 1 solution addition rate 18L / min, stirring speed 130r / min; second deionized water addition rate 180L / h, stirring time 38min; discharge is by pump discharge, small pump speed.

[0061] Example 3

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

[0063] Operation parameters: PBTC addition rate 5L / min, liquid alkali addition rate 8L / min, first reactor stirring speed 100r / min, stirring time 22min; first deionized water addition rate 120L / h, sodium formate solution addition rate 12L / min, stirring speed 100r / min, stirring time 22min; PESA addition rate 12g / min, stirring speed 130r / min, stirring time 12min; No. 1 solution addition rate 12L / min, stirring speed 100r / min; second deionized water addition rate 120L / h, stirring time 32min; discharge adopts pressure discharge, and the pressure is controlled at 0.2MPa.

[0064] Example 4

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

[0066] Operation parameters: PBTC addition rate 8L / min, liquid alkali addition rate 14L / min, first reactor stirring speed 150r / min, stirring time 26min; first deionized water addition rate 200L / h, sodium formate solution addition rate 16L / min, stirring speed 140r / min, stirring time 26min; PESA addition rate 16g / min, stirring speed 170r / min, stirring time 16min; No. 1 solution addition rate 16L / min, stirring speed 140r / min; second deionized water addition rate 200L / h, stirring time 36min; discharging adopts a combination of gravity discharging and pump discharging, first gravity discharging to a certain extent and then pump discharging, the pump speed is 1000r / min.

[0067] Table 1 Amount of raw materials used in Examples 1-4

[0068]

[0069]

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

[0071] Test example

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

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

[0074] Test method: Test group A, test group B, test group C and test group D respectively use the composition ratios of the wastewater treatment materials provided in Examples 1-4; the control examples use control group A, control group B, control group C, control group D, control group E, control group F, control group G and control group H, wherein:

[0075] Control group A

[0076] Raw material dosage: 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 of the second addition accounts for 22% of the total mass, the sodium formate solution accounts for 13% of the total mass, and the PESA accounts for 19% of the total mass, but 48% liquid caustic soda is not added;

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

[0078] Control group B

[0079] Amount of raw materials: PBTC accounts for 15% of the total mass, 48% liquid caustic soda accounts for 17% of the added mass of PBTC, the first added mass of deionized water accounts for 36% of the total mass, the second added mass accounts for 31% of the total mass, and PESA accounts for 15% of the total mass; but no sodium formate solution is added;

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

[0081] Control group C

[0082] Raw material dosage: PBTC accounts for 20% of the total mass, 48% liquid caustic soda accounts for 13% of the added mass of PBTC, the first added mass of deionized water accounts for 24% of the total mass, the second added mass accounts for 21% of the total mass, the sodium formate solution accounts for 11% of the total mass, and PESA accounts for 23% of the total mass;

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

[0084] Control group D

[0085] Raw material dosage: PBTC accounts for 8% of the total mass, 48% liquid caustic soda accounts for 8% of the added mass of PBTC, the first added mass of deionized water accounts for 33% of the total mass, the second added mass accounts for 23% of the total mass, the sodium formate solution accounts for 17% of the total mass, and the PESA accounts for 18% of the total mass;

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

[0087] Control group E

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

[0089] The operating parameters are the same as those in Example 1, except that the PBTC addition rate, the liquid alkali addition rate, the first deionized water addition rate, the sodium formate solution addition rate, the PESA addition rate, the No. 1 solution addition rate and the second deionized water addition rate are not considered, and the discharge is performed by pressure discharge, but the pressure control device is not installed.

[0090] Control group F

[0091] The amount of raw materials is the same as in Example 2;

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

[0093] Control group G

[0094] The amount of raw materials is the same as that in Example 3;

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

[0096] Operation parameters.

[0097] Control group H

[0098] The amount of raw materials used was the same as in Example 4, but the second addition of deionized water was not performed;

[0099] The operating parameters were the same as those in Example 4, except that the second addition of deionized water was not performed and the discharge parameters were not controlled.

[0100] Specific detection indicators are shown in Table 2.

[0101] Table 2 Test indicators of each sample

[0102] Scale inhibition rate % Corrosion inhibition% stability% Dispersibility % Biodegradability % Environmental protection % Experimental 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 As shown in Table 2, for the above comparison data, it can be seen that:

[0104] The test groups A to D (Examples 1-4) were significantly better than the control group in various test indicators. The scale inhibition rate, corrosion inhibition, stability, dispersibility, biodegradability and environmental protection of the test groups were all high, among which the test group A performed most outstandingly in various indicators. However, the performance of the control group was significantly reduced due to different degrees of deficiency or change in raw materials or operating parameters. For example, the control group A did not add 48% liquid alkali, and its various performance indicators were greatly reduced; the control group E did not consider the addition speed of each raw material and did not install a pressure control device for the discharge, and its performance was also greatly affected; the control group H did not add deionized water for the second time and the discharge was random, and its performance was also at a relatively low level among the control groups.

[0105] It can be seen that the high-efficiency scale inhibitor and corrosion inhibitor and the preparation process thereof provided by the embodiments of the present invention have significant effects. By controlling the amount of each raw material and the addition speed, stirring parameters, discharging method and other operating parameters, the quality and performance of the product can be effectively improved. The components act synergistically, PBTC disperses the insoluble inorganic salts, PESA exerts good scale inhibition, dispersing and corrosion inhibition effects and is green, environmentally friendly and biodegradable, the sodium formate solution promotes system stability and smooth reaction, and deionized water effectively controls the reaction process and improves product uniformity.

[0106] From the above, it can be seen that the data of test group A (Example 1) is the best, because in various test indicators, the scale inhibition rate of test group A reaches 90%, the corrosion inhibition is 80%, the stability is 93%, the dispersibility is 85%, the biodegradability is 90%, and the environmental protection is 92%, which are all at a relatively high level. It is prepared according to the prescribed raw material dosage and operating parameters, which improves the stability and efficiency of product quality, and the synergistic effect of each component is most fully exerted, which 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 descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A preparation process of a highly efficient scale and corrosion inhibitor, characterized in that: The following steps are involved: S1. Material preparation: PBTC, 48% liquid caustic soda, deionized water, sodium formate solution and PESA, and two clean reactors, namely the first reactor and the second reactor; S2, operation of the first reactor: PBTC is added into the first reactor, the stirring device is turned on for stirring, and then 48% of liquid alkali is added, and the pH value of the solution is monitored in real time. When the pH value of the solution reaches 8.5-9.5, the addition of 48% of liquid alkali is stopped. At this time, the obtained solution is marked as solution No. 1 and is placed aside for use; S3, operation of the second reactor: add deionized water into the second reactor for the first time, then add the sodium formate solution into the second reactor, stir while adding, and after stirring until it is completely dissolved, add PESA and stir until PESA is completely dissolved; S4, subsequent operation: adding solution No. 1 in the first reactor to the second reactor, stirring while adding, and continuing to stir for 10 minutes after adding solution No. 1, and then adding deionized water to the second reactor for the second time and stirring; S5. Discharging and subsequent processing: Finally, use one of the discharging methods, such as gravity discharging, pump discharging and pressure discharging, to ensure the quality and stability of the product. The discharged product is then packaged and stored in an environment that avoids direct sunlight, high temperature and humidity. At the same time, the product is quality tested.

2. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S2, the speed of adding PBTC is controlled at 4L / min-9L / min.

3. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S2, the stirring speed of the stirring device is 80r / min-160r / min, and the stirring time of the stirring device is 20min-30min.

4. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S2, the speed of adding 48% of the liquid caustic soda is controlled at 5L / min-16L / min.

5. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S3, the speed of adding deionized water for the first time is 60 L / h-240 L / h.

6. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S3, the sodium formate solution is added at a speed of 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.

7. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S3, the speed of adding 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.

8. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S4, the speed of adding solution No. 1 is 9 L / min-26 L / min, and the speed of stirring is 60 r / min-150 r / min.

9. The preparation process of the high-efficiency scale and corrosion inhibitor according to claim 1, characterized in that: In S4, the speed of adding deionized water for the second time is 60 L / h-240 L / h. After adding the deionized water, stirring is continued for 30 min-40 min.

10. A highly efficient scale and corrosion inhibitor, characterized in that: The high-efficiency scale and corrosion inhibitor prepared by the preparation process described in any one of claims 1 to 9 comprises the following raw materials: The PBTC, added mass accounts for 10%-18% of the total mass; The mass of the 48% liquid caustic soda added accounts for 10%-18% of the mass of PBTC added; The deionized water is added in an amount of 25% to 35% of the total mass for the first time and 20% to 28% of the total mass for the second time; The sodium formate solution is added in an amount of 8% to 16% of the total mass; The added mass of the PESA accounts for 12%-20% of the total mass.

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