A phosphorus-free scale and corrosion inhibitor and its preparation method

Abstract

The present invention provides a phosphorus-free scale and corrosion inhibitor and a preparation method, relating to the technical field of water pollution control agents. The phosphorus-free scale and corrosion inhibitor comprises the following raw materials in parts by weight: 40-60 parts of polyepoxysuccinic acid, 20-40 parts of polyaspartic acid, 10-15 parts of an inorganic metal salt, 1-3 parts of an azole compound, 3-5 parts of a dispersant, and 30-60 parts of deionized water. In the present invention, polyepoxysuccinic acid and polyaspartic acid can reduce the production of calcium carbonate scale and calcium sulfate scale crystals in circulating water, thereby inhibiting corrosion of circulating water delivery pipelines and effectively preventing scaling and corrosion in circulating water. The scale and corrosion inhibitor has scale and corrosion inhibition properties. Moreover, the scale and corrosion inhibitor does not contain phosphorus, thereby avoiding eutrophication of water bodies and helping to maintain ecological balance.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution prevention and control agents, and in particular to a phosphorus-free scale and corrosion inhibitor and a preparation method thereof. Background Art

[0002] Circulating water scale and corrosion inhibitor is a water pollution prevention and control agent used in circulating water systems. Its core function is to prevent scale formation and slow down the corrosion of metal equipment, thereby ensuring the stable operation of the circulating water system.

[0003] Chinese patent publication number CN119263505B discloses a composite multi-effect scale and corrosion inhibitor and its preparation method, belonging to the technical field of water treatment agents. The composite multi-effect scale and corrosion inhibitor is composed of carboxylic acid monomers, sulfonate monomers, organophosphorus compounds, modified chitosan, modified nano-titanium dioxide, oxidative initiators, reduced initiators, and azole derivatives. The modified chitosan comprises chitosan coated with cerium chloride, and the modified nano-titanium dioxide comprises nano-titanium dioxide coated with sodium polyaspartate. The composite multi-effect scale and corrosion inhibitor is prepared by a simultaneous synthesis and compounding process, exhibiting excellent scale inhibition and a comprehensive scale removal capacity exceeding 97%. It can be used in circulating cooling water systems with high pH, ​​high alkalinity, high temperature, and high hardness under high concentration conditions, making it suitable for the demanding circulating cooling water treatment requirements of industries such as chemical, smelting, and light industry.

[0004] Although the above-mentioned scale and corrosion inhibitors have excellent scale inhibition effects, they contain organophosphorus compounds. Excessive organophosphorus compounds can cause eutrophication of water bodies, leading to massive reproduction of algae in water bodies and destroying the ecological balance. Summary of the Invention

[0005] The present invention provides a phosphorus-free scale and corrosion inhibitor and a preparation method thereof, which are used to solve the technical problem that current scale and corrosion inhibitors contain organic phosphorus compounds, excessive organic phosphorus compounds will cause eutrophication of water bodies, lead to massive reproduction of algae in water bodies, and destroy the ecological balance.

[0006] To solve the above technical problems, the present invention discloses a phosphorus-free scale and corrosion inhibitor, comprising the following raw materials in parts by weight: 40-60 parts of polyepoxysuccinic acid, 20-40 parts of polyaspartic acid, 10-15 parts of inorganic metal salt, 1-3 parts of azole compound, 3-5 parts of dispersant, and 30-60 parts of deionized water.

[0007] Preferably, the inorganic metal salt is at least one of sodium molybdate, potassium molybdate, ammonium molybdate, sodium tungstate, potassium tungstate and ammonium tungstate.

[0008] Preferably, the azole compound includes but is not limited to benzotriazole or tolyltriazole.

[0009] Preferably, the dispersant includes but is not limited to polyethylene glycol 600.

[0010] Also included is a method for preparing a phosphorus-free scale and corrosion inhibitor, which is used to prepare the above-mentioned phosphorus-free scale and corrosion inhibitor, comprising the following steps:

[0011] Add deionized water to the preparation tank;

[0012] Add the raw materials into the preparation tank quantitatively at equal time intervals;

[0013] After stirring for a preset stirring time by a stirring mechanism in a preparation tank, a phosphorus-free scale and corrosion inhibitor is prepared.

[0014] Preferably, adding the raw materials into the preparation tank in equal intervals and in a quantitative manner comprises:

[0015] The polyaspartic acid, inorganic metal salt and azole compound are quantitatively added into the preparation tank through the quantitative adding mechanism;

[0016] Add polyepoxysuccinic acid and dispersant into the preparation tank quantitatively through the liquid inlet pipe.

[0017] Preferably, the preset stirring time is 0.5-1h.

[0018] Preferably, the raw material addition time is less than 0.5h.

[0019] Preferably, a tank cover is provided on the top of the preparation tank, a feeding block is provided on the tank cover, a number of storage cavities are provided in the feeding block, a quantitative adding mechanism is provided below the storage cavity, the quantitative adding mechanism is used to quantitatively add different preparation raw materials into the preparation tank, a stirring mechanism is provided in the preparation tank, the stirring mechanism is used to stir the solution in the preparation tank.

[0020] Preferably, a mixing drum is provided at the bottom of the tank cover, a spiral mixing tube is provided at the lower end of the mixing drum, a liquid inlet pipe is provided on the side wall of the mixing drum, the liquid inlet pipe extends away from one end of the mixing drum to the outside of the preparation tank and is provided with several liquid supply pipes, and a liquid supply pump is provided on the liquid supply pipe.

[0021] The technical solution of the present invention has the following advantages: The present invention provides a phosphorus-free scale and corrosion inhibitor and a preparation method, relating to the technical field of water pollution control agents. The phosphorus-free scale and corrosion inhibitor comprises the following raw materials by weight: 40-60 parts of polyepoxysuccinic acid, 20-40 parts of polyaspartic acid, 10-15 parts of an inorganic metal salt, 2-10 parts of an azole compound, 1-3 parts of a dispersant, and 10-50 parts of deionized water. In the present invention, the polyepoxysuccinic acid and polyaspartic acid can reduce the production of calcium carbonate scale and calcium sulfate scale crystals in circulating water, thereby inhibiting corrosion of circulating water delivery pipelines and effectively preventing scaling and corrosion in the circulating water. The scale and corrosion inhibitor has scale and corrosion inhibition properties. Furthermore, the scale and corrosion inhibitor does not contain phosphorus, thereby avoiding eutrophication of water bodies and helping to maintain ecological balance.

[0022] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the accompanying drawings.

[0023] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of a method for preparing a phosphorus-free scale and corrosion inhibitor according to the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the preparation tank in the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the preparation tank in the present invention;

[0028] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A;

[0029] Figure 5 For the present invention Figure 3 A magnified view of the structure at point B in the middle;

[0030] Figure 6 For the present invention Figure 4 A magnified view of the structure at point C in the middle;

[0031] Figure 7 A top view of the internal structure of the annular mounting cavity in the present invention;

[0032] Figure 8 For the present invention Figure 7 A magnified view of the structure at point D in the middle;

[0033] Figure 9 For the present invention Figure 8 Partial cross-sectional view at EE.

[0034] In the figure: 1. Preparation tank; 2. Tank cover; 3. Feeding block; 4. Storage chamber; 5. Dust cover; 6. Feeding hole; 7. Feeding pipe; 8. Connecting hole; 9. Sliding plate; 10. Dosing hole; 11. Driving motor; 12. Driving rod; 13. Connecting rod; 14. Moving block; 15. Pull plate; 16. First fixed block; 17. Second fixed block; 18. Stirring shaft; 19. Stirring blade; 20. Stirring motor; 21. Mixing drum; 22. Spiral mixing pipe; 23. Liquid inlet pipe; 24. Liquid supply pipe; 25. Liquid supply pump; 26. Diverter pipe; 27 , discharge pipe; 28, curved plate; 29, curved through hole; 30, baffle plate; 31, connecting plate; 32, annular mounting cavity; 33, fixing ring; 34, slide groove; 35, slider; 36, reset spring; 37, fixing rod; 38, gear ring; 39, sliding block; 40, curved rack; 41, rotating shaft; 42, first gear; 43, connecting rope; 44, electric push rod; 45, first rack; 46, support block; 47, second rack; 48, rotating shaft; 49, mounting rod; 50, second gear; 51, spring rod; 52, knocking ball. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] Example 1

[0038] The embodiment of the present invention provides a phosphorus-free scale and corrosion inhibitor, which includes the following raw materials in parts by weight: 60 parts of polyepoxysuccinic acid, 20 parts of polyaspartic acid, 10 parts of inorganic metal salt, 2 parts of benzotriazole, 5 parts of dispersant, and 30 parts of deionized water;

[0039] Preferably, the dispersant is polyethylene glycol 600;

[0040] Also included is a method for preparing a phosphorus-free scale and corrosion inhibitor, which is used to prepare the above-mentioned phosphorus-free scale and corrosion inhibitor, such as Figure 1 As shown, the following steps are included:

[0041] Add deionized water into preparation tank 1;

[0042] Add the raw materials to the preparation tank 1 at equal intervals and quantitatively for 0.3 hours;

[0043] After stirring for a preset stirring time by the stirring mechanism in the preparation tank 1, a phosphorus-free scale and corrosion inhibitor is prepared, and the preset stirring time is 1 hour;

[0044] The raw materials are quantitatively added into the preparation tank 1 at equal intervals, including:

[0045] The polyaspartic acid, inorganic metal salt and azole compound are quantitatively added into the preparation tank 1 through the quantitative adding mechanism;

[0046] Add polyepoxysuccinic acid and dispersant quantitatively into preparation tank 1 through the liquid inlet pipe;

[0047] like Figure 2 As shown, a tank cover 2 is provided on the top of the preparation tank 1, a feeding block 3 is provided on the tank cover 2, a plurality of storage cavities 4 are provided in the feeding block 3, and a quantitative adding mechanism is provided below the storage cavity 4. The quantitative adding mechanism is used to add different preparation raw materials into the preparation tank 1 in a quantitative manner. A stirring mechanism is provided in the preparation tank 1, and the stirring mechanism is used to stir the solution in the preparation tank 1.

[0048] The working principle and beneficial effects of the above technical solution are as follows: In the present invention, polyepoxysuccinic acid and polyaspartic acid can reduce the production of calcium carbonate scale and calcium sulfate scale crystals in circulating water, thereby inhibiting the corrosion of circulating water delivery pipelines, effectively preventing scaling and corrosion in circulating water, and having scale and corrosion inhibition properties. In addition, the scale and corrosion inhibitor does not contain phosphorus, thereby avoiding eutrophication of water bodies and helping to maintain ecological balance.

[0049] When preparing the corrosion inhibitor, different preparation raw materials are first added to the storage chamber 4 respectively. The preparation raw materials can be solid raw materials or liquid raw materials. Preferably, the raw materials in the storage chamber 4 are solid raw materials, and the solid raw materials include polyaspartic acid, inorganic metal salts and azole compounds. Then, the solid raw materials can be quantitatively added to the preparation tank 1 through the quantitative addition mechanism in the feeding block 3, and at the same time, polyepoxysuccinic acid and dispersant are quantitatively added to the preparation tank 1 through the liquid inlet pipe 23. Deionized water is pre-added to the preparation tank 1. During the addition of the preparation raw materials, the stirring mechanism is started to stir the solution so that the solid raw materials are fully dissolved and mixed evenly in the solution. During the stirring process, the solid raw materials are automatically added to the preparation tank 1 through the quantitative addition mechanism. The addition time is 0.3h, and after 1h of stirring, the phosphorus-free scale and corrosion inhibitor is finally obtained. In the present invention, different solid raw materials can be quantitatively added into the preparation tank 1 through the quantitative adding mechanism, thereby realizing the quantitative feeding of solid raw materials in batches, avoiding excessive feeding of solid raw materials, being beneficial to controlling the feeding amount of solid raw materials, and saving the preparation cost of phosphorus-free scale and corrosion inhibitors. Moreover, the quantitative feeding of solid raw materials in batches can avoid local overreaction or accumulation and agglomeration of solid raw materials in the preparation tank 1, thereby ensuring the smooth progress of the preparation process of the phosphorus-free scale and corrosion inhibitor, improving the reliability of the preparation of the corrosion inhibitor, ensuring the corrosion inhibition effect of the corrosion inhibitor, and improving the preparation quality and product consistency of the phosphorus-free scale and corrosion inhibitor.

[0050] Example 2

[0051] On the basis of the above embodiment 1, Figure 3 As shown, a dust cover 5 is provided on the tank cover 2 , and the dust cover 5 is provided outside the feeding block 3 .

[0052] The working principle and beneficial effects of the above technical solution are as follows: a dust cover 5 is provided on the outside of the feeding block 3, and the dust cover 5 can protect the storage chamber 4 of the feeding block 3 from dust, thereby preventing impurities from mixing into the solid raw materials in the storage chamber 4, thereby ensuring the preparation quality of the phosphorus-free scale and corrosion inhibitor.

[0053] Example 3

[0054] On the basis of Example 1 or 2, as Figure 2-Figure 5 As shown, the quantitative addition mechanism includes a sliding cavity, which is arranged below the storage cavity 4. The lower end of the storage cavity 4 is connected to the sliding cavity through a feeding hole 6. A feeding pipe 7 is arranged below the sliding cavity. The lower end of the feeding pipe 7 extends into the preparation tank 1. The sliding cavity is connected to the feeding pipe 7 near the upper end through a plurality of communicating holes 8. A sliding plate 9 is slidingly arranged in the sliding cavity, and a plurality of quantitative holes 10 are provided in the sliding plate 9.

[0055] The plurality of quantitative holes 10, the feeding holes 6 and the communicating holes 8 correspond to each other one by one.

[0056] The working principle and beneficial effects of the above technical solution are as follows: the sliding plate 9 can slide left and right in the sliding cavity, and the right end of the sliding plate 9 extends to the outside of the feeding block 3. During production, the sliding plate 9 is first pushed to the leftmost side. At this time, the quantitative hole 10 in the sliding plate 9 is connected with the corresponding feeding hole 6, and the solid raw material in the storage cavity 4 flows into the quantitative hole 10 through the feeding hole 6. After the solid raw material fills the quantitative hole 10, the sliding plate 9 is pulled to the right so that the quantitative hole 10 is aligned with the corresponding connecting hole 8. The quantitative solid raw material in the quantitative hole 10 can flow into the feeding pipe 7 through the connecting hole 8, and then be quantitatively fed into the preparation tank 1. After the solid raw material is fed, the sliding plate 9 is pushed to the leftmost side of the sliding cavity to obtain the solid raw material again. Repeating the above steps can realize the quantitative feeding of the solid raw material. Through the quantitative feeding of the solid raw material, the feeding amount of the solid raw material can be accurately controlled, excessive feeding can be avoided, and the preparation cost can be saved. The connecting pipe is provided with an inclined section, which is connected to the feeding pipe 7 through the inclined section to facilitate the flow of the solid raw material into the feeding pipe 7.

[0057] Example 4

[0058] On the basis of Example 3, Figure 5 As shown, the upper end of the communicating hole 8 is funnel-shaped.

[0059] The working principle and beneficial effects of the above technical solution are as follows: the diameter of the upper end of the connecting hole 8 is larger than the diameter of the lower end of the connecting hole 8, and the diameter of the upper end of the connecting hole 8 is larger than the diameter of the quantitative hole 10, which facilitates the complete flow of the solid raw material in the quantitative hole 10 into the connecting hole 8, prevents the solid raw material from remaining in the quantitative hole 10, and improves the reliability of the quantitative delivery of the solid raw material.

[0060] Example 5

[0061] On the basis of Example 3 or 4, Figure 2 As shown, the quantitative addition mechanism also includes a driving component, which is used to drive the sliding plate 9 to slide back and forth along the sliding cavity. The driving component includes a fixed plate, which is arranged on the tank cover 2, and a driving motor 11 is arranged on the front side of the fixed plate. A driving rod 12 is arranged at the output end of the driving motor 11, and the driving rod 12 is connected to the moving block 14 through the connecting rod 13 at one end away from the driving motor 11. The moving block 14 is slidingly arranged on the pull plate 15, and one end of the pull plate 15 is connected to one end of the sliding plate 9. A first fixed block 16 and a second fixed block 17 are spaced apart on the pull plate 15, and the moving block 14 is located between the first fixed block 16 and the second fixed block 17.

[0062] The working principle and beneficial effects of the above technical solution are as follows: the driving motor 11 is started, and the rotation of the driving motor 11 can drive the driving rod 12 to rotate. One end of the driving rod 12 is hingedly connected to the connecting rod 13, and the other end of the connecting rod 13 is hingedly connected to the moving block 14. When the driving rod 12 rotates, the connecting rod 13 drives the moving block 14 to slide back and forth on the pulling plate 15. When the moving block 14 contacts the first fixed block 16 on the left, it can push the first fixed block 16 to move toward the feeding block 3, and the first fixed block 16 drives the pulling plate 15 to The pulling plate 15 moves in the direction of the sliding cavity, and the sliding plate 9 is driven by the pulling plate 15 to slide in the sliding cavity until the sliding plate 9 contacts the inner wall on the left side of the sliding cavity. At this time, the quantitative hole 10 is connected with the feeding hole 6, and the solid raw material in the storage cavity 4 flows into the quantitative hole 10 through the feeding hole 6. At the same time, the connecting rod 13 drives the moving block 14 to slide in the direction away from the feeding block 3. The moving block 14 first slides along the upper surface of the pulling plate 15. During the sliding process, the solid raw material in the storage cavity 4 fully flows into the quantitative hole 10 and fills the quantitative hole 10, so that the solid raw material flows into the quantitative hole 10. The hole 10 provides sufficient time, which improves the accuracy of the solid raw material in the quantitative hole 10; when the moving block 14 contacts the second fixed block 17 on the right, the moving block 14 drives the second fixed block 17 to move away from the feeding block 3, and the second fixed block 17 drives the pull plate 15 to move away from the feeding block 3, and the pull plate 15 drives the sliding plate 9 to slide outward. When the end of the driving rod 12 is located at the far right, the quantitative hole 10 is connected to the upper end of the connecting hole 8. As the driving rod 12 rotates, the moving block 14 moves closer to the first fixed block on the pull plate 15. 16 direction sliding, when the moving block 14 is not in contact with the first fixed block 16, the pulling plate 15 will not move, and during the sliding process of the moving block 14, the solid raw material in the quantitative hole 10 can fully flow into the connecting hole 8, avoiding the residual solid raw material in the quantitative hole 10, ensuring that the solid raw material is quantitatively fed into the preparation tank 1, and by setting a driving component, the sliding plate 9 can be made to reciprocate left and right in the gap in the sliding cavity, thereby realizing automatic feeding of the solid raw material, which not only ensures the quantitative feeding of the solid raw material, but also improves the preparation efficiency of the phosphorus-free scale inhibitor and corrosion inhibitor.

[0063] Example 6

[0064] On the basis of any one of Examples 1-5, Figure 3 As shown, the stirring mechanism includes a stirring shaft 18, which is arranged in the preparation tank 1, and a plurality of stirring blades 19 are arranged on the outer wall of the stirring shaft 18. The upper end of the stirring shaft 18 passes through the tank cover 2 and is connected to the output end of the stirring motor 20, and the stirring motor 20 is arranged on the tank cover 2.

[0065] The working principle and beneficial effects of the above technical solution are as follows: after the prepared raw materials are put into the preparation tank 1, the stirring motor 20 is started, and the stirring motor 20 rotates to drive the stirring blade 19 to rotate, thereby stirring the prepared raw materials in the preparation tank 1, so that the prepared raw materials are evenly mixed and fully reacted, thereby preparing a phosphorus-free scale and corrosion inhibitor.

[0066] Example 7

[0067] On the basis of any one of Examples 3-5, Figure 3 As shown, a mixing drum 21 is provided at the bottom of the tank cover 2, a spiral mixing tube 22 is provided at the lower end of the mixing drum 21, the lower end of the feeding tube 7 is connected to the upper position of the spiral mixing tube 22, a liquid inlet pipe 23 is provided on the side wall of the mixing drum 21, and the liquid inlet pipe 23 extends away from one end of the mixing drum 21 to the outside of the preparation tank 1 and is provided with a plurality of liquid supply pipes 24, and a liquid supply pump 25 is provided on the liquid supply pipe 24;

[0068] A diverter pipe 26 is provided at the lower end of the spiral mixing pipe 22 , and a plurality of injection ports are provided at equal intervals at the bottom of the diverter pipe 26 .

[0069] The working principle and beneficial effects of the above technical solution are as follows: the solid raw material falls into the spiral mixing tube 22 through the feeding pipe 7, and then the liquid supply pump 25 is started to transport the prepared solution into the liquid supply tube 24. The prepared solution is a liquid raw material. The liquid raw material includes polyepoxysuccinic acid, a dispersant and deionized water. Different liquid raw materials are transported to the liquid supply tube 24 through different liquid supply pumps 25, and then collected into the mixing drum 21. After preliminary mixing in the mixing drum 21, they quickly flow into the spiral mixing tube 22. The liquid raw material is mixed with the solid raw material, and the solid raw material is further mixed in the spiral mixing tube 22, which helps the solid raw material to be mixed. The initial dissolution is carried out, and finally the mixed raw materials are evenly injected into the preparation solution in the preparation tank 1 through the injection port of the diversion pipe 26. The impact of the liquid raw material on the solid raw material can avoid the solid raw material from remaining in the spiral mixing tube 22, thereby ensuring the quantitative feeding of the solid raw material. The solid raw material can be initially dissolved by the liquid raw material, thereby fully dissolving the small particles of solid raw material, avoiding the small particles of solid raw material floating on the surface of the preparation solution in the preparation tank 1 and affecting the reaction efficiency, thereby enhancing the mixing efficiency of the liquid raw material and the solid raw material, improving the preparation efficiency of the phosphorus-free scale inhibitor and corrosion inhibitor, reducing the preparation time, and saving the preparation cost.

[0070] Example 8

[0071] On the basis of any one of Examples 1-7, Figure 2 As shown, a discharge pipe 27 is provided at the lower end of the preparation tank 1 , and a discharge valve is provided on the discharge pipe 27 .

[0072] The working principle and beneficial effects of the above technical solution are as follows: after the preparation of the non-phosphorus scale and corrosion inhibitor is completed, the prepared non-phosphorus scale and corrosion inhibitor can be taken out by opening the discharge valve, which is convenient and quick.

[0073] Example 9

[0074] On the basis of any one of Examples 3-5, Figure 3-Figure 7 As shown, a capacity control component is provided in the metering hole 10, and the capacity control component includes an arc plate 28, the outer wall of the arc plate 28 is fitted with the inner wall of the metering hole 10, four arc plates 28 are provided, and the four arc plates 28 are distributed in a circular array about the central axis of the metering hole 10, an arc through hole 29 is provided through the arc plate 28, and a baffle plate 30 is provided between two adjacent arc plates 28, one end of the baffle plate 30 extends into the arc through hole 29 and is connected to the arc through hole 29 through a connecting plate 31, and the other end of the baffle plate 30 extends into another arc through hole 29 and is slidably connected to the inner wall of the arc through hole 29, the baffle plate 30 is made of elastic material, an annular mounting cavity 32 is provided in the sliding plate 9, the annular mounting cavity 32 is communicated with the metering hole 10, the central axis of the annular mounting cavity 32 is on the same straight line as the central axis of the metering hole 10, and a pushing component is provided in the annular mounting cavity 32, and the pushing component is used to push the arc plate 28 to move in the metering hole 10.

[0075] The working principle and beneficial effects of the above technical solution are as follows: since the proportions of different solid raw materials may be different, the total amount of different solid raw materials added is different. In order to ensure the preparation efficiency, when adding solid raw materials, the single amount of different solid raw materials in different storage chambers 4 is different. In order to adapt to different amounts of addition, a capacity control component is set in the quantitative hole 10. When the quantitative hole 10 is aligned with the feed hole 6, the solid raw materials in the storage chamber 4 can flow through the feed hole 6 to the space surrounded by the four arc plates 28 and the four baffle plates 30. The size of the space surrounded by the four arc plates 28 and the four baffle plates 30 is the single amount of solid raw materials added. The capacity control component can be adaptively adjusted according to the quantitative amount of different solid raw materials. Specifically, the pushing component can push the arc plate 28 in the quantitative hole 10 away from the annular mounting cavity. The arc plates 28 move in the direction of 32, and the baffle plates 30 in the arc plates 28 are made of elastic plates. Therefore, as the arc plates 28 move inward, the distance between the two adjacent arc plates 28 decreases, and one end of the baffle plate 30 is fixedly connected to the inner wall of the arc-shaped through hole 29 through the connecting plate 31, and the other end of the baffle plate 30 can slide in the arc-shaped through hole 29 in the adjacent arc plates 28. The space surrounded by the four arc plates 28 and the four baffle plates 30 gradually decreases, thereby reducing the single delivery amount of solid raw materials. When the pushing component drives the arc plates 28 to move toward the direction close to the annular mounting cavity 32, the space surrounded by the four arc plates 28 and the four baffle plates 30 gradually expands, thereby increasing the single delivery amount of solid raw materials. Through the capacity control component, the single delivery amount of the corresponding solid raw materials can be flexibly adjusted, which is convenient for the automatic delivery of different solid raw materials.

[0076] Example 10

[0077] On the basis of Example 9, Figure 6 、 Figure 7As shown, the pushing assembly includes a fixed ring 33, which is arranged on the bottom wall of the annular mounting cavity 32, and a sliding groove 34 corresponding to the arc plate 28 is arranged on the upper surface of the fixed ring 33, and a slider 35 is slidingly arranged in the sliding groove 34, one end of the slider 35 is connected to the inner wall of the sliding groove 34 through a return spring 36, and the upper end of the slider 35 is connected to the outer wall of the arc plate 28 through a fixing rod 37, a gear ring 38 is arranged outside the fixed ring 33, and a plurality of sliding blocks 39 are arranged between the gear ring 38 and the fixed ring 33, one end of the sliding block 39 is connected to the inner wall of the gear ring 38, and the other end of the sliding block 39 is slidably connected to the outer wall of the fixed ring 33, and a plurality of arc-shaped racks 40 are arranged on the inner wall of the gear ring 38. The arc-shaped rack 40 corresponds to the slider 35 one by one. A rotating shaft 41 is set between the arc-shaped rack 40 and the fixed ring 33. The upper and lower ends of the rotating shaft 41 are respectively rotatably connected to the upper and lower inner walls of the annular mounting cavity 32. A first gear 42 is set on the rotating shaft 41, and the first gear 42 is engaged with the arc-shaped rack 40. A connecting rope 43 is set between the rotating shaft 41 and the slider 35. One end of the connecting rope 43 is connected to the slider 35, and the other end of the connecting rope 43 is wound around the rotating shaft 41 and connected to the outer wall of the rotating shaft 41. An electric push rod 44 is set in the annular mounting cavity 32. A first rack 45 is set at the output end of the electric push rod 44. The first rack 45 is engaged with the outer wall of the ring gear 38.

[0078] The working principle and beneficial effects of the above technical solution are as follows: when it is necessary to narrow the space surrounded by the four arcuate plates 28 and the four baffle plates 30, the electric push rod 44 is controlled to be pushed out, and the first rack 45 drives the gear ring 38 to rotate outside the fixed ring 33. The gear ring 38 rotates outside the fixed ring 33 through the sliding block 39, and at the same time drives multiple arcuate racks 40 on the inner wall to rotate. The arcuate racks 40 correspond to the sliders 35 one by one. When the arcuate racks 40 rotate, they mesh with the first gear 42 and drive the first gear 42 to rotate. The rotation of the first gear 42 drives the rotating shaft 41 to rotate. The rotating shaft 41 rotates to release the connecting rope 43. Under the action of the reset spring 36, the slider 35 slides along the slide groove 34 in the direction away from the rotating shaft 41. The slider 35 drives the arcuate plate 2 through the fixed rod 37. 8 moves in the direction away from the rotating shaft 41, thereby reducing the space surrounded by the four arc plates 28 and the four baffle plates 30, reducing the single feeding amount of the solid raw material; controlling the electric push rod 44 to retract, the gear ring 38 rotates in the opposite direction, the arc rack 40 drives the first gear 42 to rotate in the opposite direction, the rotating shaft 41 rotates in the opposite direction, the connecting rope 43 is wound around the rotating shaft 41, the slider 35 slides in the direction close to the rotating shaft 41, the return spring 36 is compressed, and the slider 35 drives the arc plate 28 to move in the direction close to the rotating shaft 41 through the fixed rod 37, thereby increasing the space surrounded by the four arc plates 28 and the four baffle plates 30, expanding the single feeding amount of the solid raw material, realizing the adjustment of the single feeding amount of the solid raw material, and setting a real-time monitoring device in the preparation tank 1. The real-time monitoring device can be selected according to the type of solid raw materials. The real-time monitoring device can be a pH detection sensor or a conductivity sensor. The actual content of each solid raw material after dissolution in the preparation solution can be obtained through the monitoring results of the real-time monitoring device. A controller is set outside the preparation tank 1, and the controller is electrically connected to the real-time monitoring device and the electric push rod 44 respectively. Based on the monitoring results of the real-time monitoring device, the controller can compare the actual content of each solid raw material in the solution after dissolution with the preset content range. When the actual content is less than the preset content range, the controller controls the electric push rod 44 to retract, thereby increasing the space surrounded by the four arc plates 28 and the four baffle plates 30, thereby expanding the single amount of solid raw materials added. When the actual content is within the preset content range, When in the enclosure, the electric push rod 44 remains stationary and the single amount of solid raw material added remains unchanged. When the actual content is greater than the preset content range, the controller controls the electric push rod 44 to be pushed out, thereby reducing the space surrounded by the four arc-shaped plates 28 and the four baffles 30, reducing the single amount of solid raw material added. A single capacity control component can automatically adjust according to the corresponding solid raw material, realizes automatic adjustment of the amount added, and improves the preparation efficiency of the phosphorus-free scale and corrosion inhibitor. By automatically adjusting the single amount of solid raw material added, the single amount of solid raw material added is made more accurate, avoiding waste caused by excessive solid raw material addition, saving the preparation cost of the phosphorus-free scale and corrosion inhibitor, and further improving the reliability of the preparation of the scale and corrosion inhibitor, and enhancing the scale and corrosion inhibition effect of the scale and corrosion inhibitor.

[0079] Example 11

[0080] On the basis of Example 10, Figure 7-Figure 9 As shown, a knocking mechanism is provided on the outer side of the arc-shaped plate 28, and the knocking mechanism is used to knock on the outer side of the arc-shaped plate 28. The knocking mechanism includes a support block 46, and the support block 46 is provided on the fixing ring 33. A second rack 47 is provided on the support block 46, and a rotating shaft 48 is provided above the second rack 47. Both ends of the rotating shaft 48 are rotatably connected to the mounting rod 49 respectively, and one end of the mounting rod 49 is connected to the outer side wall of the arc-shaped plate 28. A second gear 50 is provided on the rotating shaft 48, and the second gear 50 is engaged with the second rack 47. A spring rod 51 is provided on the rotating shaft 48, and a knocking ball 52 is provided at the end of the spring rod 51 away from the rotating shaft 48.

[0081] The working principle and beneficial effects of the above technical solution are as follows: when the space enclosed by the four arc-shaped plates 28 and the four baffle plates 30 moves to just above the connecting hole 8, the solid raw material can flow into the connecting hole 8. When the sliding plate 9 is stationary, the electric push rod 44 is started, and the electric push rod 44 is pushed out first, so that the space enclosed by the four arc-shaped plates 28 and the four baffle plates 30 is reduced. As the space is reduced, it is conducive to the complete outflow of the solid raw material. At the same time, the baffle plates 30 slide in the arc-shaped through holes 29 to scrape off the solid raw material adhered to the inner wall of the baffle plates 30 to avoid raw material residue; then the electric push rod 44 retracts until the four The four arc plates 28 and the four baffle plates 30 are restored to their original positions for the next material removal. During the movement of the arc plate 28, the arc plate 28 drives the rotating shaft 48 to move through the mounting rod 49. The second gear 50 on the rotating shaft 48 engages with the second rack 47 to drive the rotating shaft 48 to rotate. The rotation of the rotating shaft 48 drives the spring rod 51 to rotate. The knocking ball 52 provided at one end of the spring rod 51 can knock the arc plate 28 during the movement of the arc plate 28, thereby shaking off the solid raw material adhering to the arc plate 28, avoiding the solid raw material from remaining on the arc plate 28, and further improving the accuracy of the single delivery of the solid raw material.

[0082] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for preparing a phosphorus-free scale and corrosion inhibitor, characterized in that: The following steps are involved: Add deionized water to the preparation tank; Add the raw materials into the preparation tank quantitatively at equal time intervals; After stirring for a preset stirring time by a stirring mechanism in a preparation tank, a phosphorus-free scale and corrosion inhibitor is prepared; The raw materials are quantitatively added to the preparation tank at equal time intervals, including: The polyaspartic acid, inorganic metal salt and azole compound are quantitatively added into the preparation tank through the quantitative adding mechanism; Add polyepoxysuccinic acid and dispersant quantitatively into the preparation tank through the liquid inlet pipe; The quantitative addition mechanism includes a sliding cavity, which is arranged below the material storage cavity. The lower end of the material storage cavity is connected to the sliding cavity through a feeding hole. A feeding pipe is arranged below the sliding cavity. The lower end of the feeding pipe extends into the preparation tank. The sliding cavity is connected to the feeding pipe near the upper end through a plurality of communicating holes. A sliding plate is slidably arranged in the sliding cavity, and a plurality of quantitative holes are arranged in the sliding plate. A capacity control component is provided in the quantitative hole, and the capacity control component includes an arc-shaped plate, an outer wall of the arc-shaped plate is fitted with an inner wall of the quantitative hole, four arc-shaped plates are provided, and the four arc-shaped plates are distributed in an annular array about the central axis of the quantitative hole, an arc-shaped through-hole is provided through the arc-shaped plate, and a baffle plate is provided between two adjacent arc-shaped plates, one end of the baffle plate extends into the arc-shaped through-hole and is connected to the arc-shaped through-hole through a connecting plate, and the other end of the baffle plate extends into another arc-shaped through-hole and is slidably connected to the inner wall of the arc-shaped through-hole, the baffle plate is made of elastic material, an annular mounting cavity is provided in the sliding plate, the annular mounting cavity is communicated with the quantitative hole, the central axis of the annular mounting cavity and the central axis of the quantitative hole are on the same straight line, a pushing component is provided in the annular mounting cavity, and the pushing component is used to push the arc-shaped plate to move in the quantitative hole; The phosphorus-free scale and corrosion inhibitor comprises the following raw materials in parts by weight: 40-60 parts of polyepoxysuccinic acid, 20-40 parts of polyaspartic acid, 10-15 parts of inorganic metal salt, 1-3 parts of azole compound, 3-5 parts of dispersant and 30-60 parts of deionized water.

2. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 1, characterized in that: The inorganic metal salt is at least one of sodium molybdate, potassium molybdate, ammonium molybdate, sodium tungstate, potassium tungstate and ammonium tungstate.

3. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 1, characterized in that: Azoles include, but are not limited to, benzotriazole or tolyltriazole.

4. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 1, characterized in that: Dispersants include, but are not limited to, polyethylene glycol 600.

5. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 1, characterized in that: The preset stirring time is 0.5-1h.

6. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 5, characterized in that: The raw material addition time is less than 0.5h.

7. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 1, characterized in that: A tank cover is provided on the top of the preparation tank, a feeding block is provided on the tank cover, a number of storage cavities are provided in the feeding block, a quantitative adding mechanism is provided below the storage cavity, the quantitative adding mechanism is used to add different preparation raw materials into the preparation tank in a quantitative manner, and a stirring mechanism is provided in the preparation tank, the stirring mechanism is used to stir the solution in the preparation tank.

8. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 7, characterized in that: A mixing drum is provided at the bottom of the tank cover, a spiral mixing tube is provided at the lower end of the mixing drum, a liquid inlet pipe is provided on the side wall of the mixing drum, the liquid inlet pipe extends away from one end of the mixing drum to the outside of the preparation tank and is provided with several liquid supply pipes, and a liquid supply pump is provided on the liquid supply pipe.

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