Phosphorus-free scale and corrosion inhibitor and preparation method thereof

Abstract

The invention provides a phosphorus-free scale and corrosion inhibitor and a preparation method, and relates to the technical field of water pollution prevention and control agents.The phosphorus-free scale and corrosion inhibitor is prepared from, 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 compounds, 3-5 parts of dispersing agent and 30-60 parts of deionized water. According to the scale and corrosion inhibitor, production of calcium carbonate scale and calcium sulfate scale crystals in the circulating water can be reduced through the polyepoxysuccinic acid and the polyaspartic acid, so that corrosion of a circulating water conveying pipeline is inhibited, scaling and corrosion phenomena are effectively prevented from being generated in the circulating water, the scale and corrosion inhibitor has scale and corrosion inhibition performance, and the scale and corrosion inhibitor does not contain phosphorus, avoids eutrophication of a water body, and has a good application prospect. The ecological balance is favorably maintained.

Description

Technical Field

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

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

[0003] Chinese Patent with the authorization announcement number CN119263505B discloses that the present invention relates to a composite multi-effect scale and corrosion inhibitor and a preparation method thereof, belonging to the technical field of water treatment agents. The composite multi-effect scale and corrosion inhibitor uses carboxylic acid monomers, sulfonate monomers, organic phosphorus compounds, modified chitosan, modified nano-titanium dioxide, oxidizing initiators, reducing initiators, azole derivatives and other components as raw materials. Among them, the modified chitosan is cerium chloride-coated on the surface of chitosan; the modified nano-titanium dioxide is sodium polyaspartate-coated on the surface of nano-titanium dioxide. The composite multi-effect scale and corrosion inhibitor is prepared by the method of synthesizing while compounding. It has excellent scale inhibition effect, and the comprehensive scale removal ability can reach more than 97%. It can be used in high-pH, high-alkalinity, high-temperature and high-hardness circulating cooling water systems under the condition of high concentration ratio operation, and is suitable for the circulating cooling water treatment requirements under harsh conditions in industries such as chemical industry, smelting and light industry.

[0004] Although the above scale and corrosion inhibitor has excellent scale inhibition effect, it contains organic phosphorus compounds. Excessive organic phosphorus compounds will cause eutrophication of water bodies, resulting in a large number of algae reproduction 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 to solve the technical problem that the current scale and corrosion inhibitor contains organic phosphorus compounds, and excessive organic phosphorus compounds will cause eutrophication of water bodies, resulting in a large number of algae reproduction in water bodies and destroying the ecological balance.

[0006] To solve the above technical problem, the present invention discloses a phosphorus-free scale and corrosion inhibitor, which 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.

[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 methylbenzotriazole.

[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 for preparing the above-mentioned phosphorus-free scale and corrosion inhibitor, comprising the following steps:

[0011] Add deionized water into the preparation tank.

[0012] Quantitatively add the raw materials into the preparation tank at equal time intervals.

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

[0014] Preferably, quantitatively adding the raw materials into the preparation tank at equal intervals includes:

[0015] Quantitatively add polyaspartic acid, inorganic metal salts and azole compounds into the preparation tank through a quantitative addition mechanism.

[0016] Quantitatively add polyepoxysuccinic acid and the dispersant into the preparation tank through a liquid inlet pipe.

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

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

[0019] Preferably, a tank cover is provided at the top of the preparation tank, a feeding block is provided on the tank cover, several storage chambers are provided in the feeding block, a quantitative addition mechanism is provided below the storage chambers, and the quantitative addition mechanism is used to quantitatively add different preparation raw materials into the preparation tank. A stirring mechanism is provided in the preparation tank, and the stirring mechanism is used to stir the solution in the preparation tank.

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

[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, which relates to the technical field of water pollution prevention and control agents. The phosphorus-free scale and corrosion inhibitor includes 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 salts, 2 - 10 parts of azole compounds, 1 - 3 parts of dispersant, and 10 - 50 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 the corrosion of circulating water conveying pipelines, effectively preventing the occurrence of scaling and corrosion phenomena in circulating water, having scale and corrosion inhibition properties, and moreover, the scale and corrosion inhibitor does not contain phosphorus, avoiding water eutrophication and contributing to maintaining ecological balance.

[0022] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the means particularly pointed out in the written description and the drawings thereof.

[0023] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0024] The 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, but do not constitute a limitation to the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of a preparation method of a phosphorus-free scale and corrosion inhibitor of the present invention;

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

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

[0028] Figure 4 For the present invention Figure 3 An enlarged view of the structure at location A therein;

[0029] Figure 5 For the present invention Figure 3 An enlarged view of the structure at location B therein;

[0030] Figure 6 For the present invention Figure 4 An enlarged view of the structure at location C therein;

[0031] Figure 7 It is a top view of the internal structure of an annular installation cavity in the present invention;

[0032] Figure 8 For the present invention Figure 7 An enlarged view of the structure at location D therein;

[0033] Figure 9 For the present invention Figure 8 A partial cross-sectional view taken along line E-E therein.

[0034] In the figure: 1, preparation tank; 2, tank cover; 3, feeding block; 4, storage cavity; 5, dust-proof cover; 6, feeding hole; 7, feeding pipe; 8, communication hole; 9, sliding plate; 10, quantitative hole; 11, driving motor; 12, driving rod; 13, connecting rod; 14, moving block; 15, pulling plate; 16, first fixing block; 17, second fixing block; 18, stirring shaft; 19, stirring blade; 20, stirring motor; 21, mixing cylinder; 22, spiral mixing pipe; 23, liquid inlet pipe; 24, liquid supply pipe; 25, liquid supply pump; 26, shunt pipe; 27, discharge pipe; 28, arc plate; 29, arc through hole; 30, surrounding baffle; 31, connecting plate; 32, annular installation cavity; 33, fixing ring; 34, chute; 35, slider; 36, reset spring; 37, fixing rod; 38, gear ring; 39, sliding block; 40, arc rack; 41, rotating shaft; 42, first gear; 43, connecting rope; 44, electric push rod; 45, first rack; 46, supporting block; 47, second rack; 48, rotating shaft; 49, installation rod; 50, second gear; 51, spring rod; 52, knocking ball. Detailed implementation mode

[0035] The following is a description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining 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 for descriptive purposes, and do not particularly 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] Embodiment 1

[0038] The embodiment of the present invention provides a non-phosphorus scale and corrosion inhibitor, and the non-phosphorus scale and corrosion inhibitor comprises 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] It also includes a preparation method of a phosphorus-free scale and corrosion inhibitor for preparing the above-mentioned phosphorus-free scale and corrosion inhibitor. As Figure 1 shown, it includes the following steps:

[0041] Add deionized water into the preparation tank 1;

[0042] Add the raw materials into the preparation tank 1 at equal intervals and quantitatively, and the raw material addition time is 0.3 h;

[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 h;

[0044] Adding the raw materials into the preparation tank 1 at equal intervals and quantitatively includes:

[0045] Quantitatively add polyaspartic acid, inorganic metal salts and azole compounds into the preparation tank 1 through a quantitative addition mechanism;

[0046] Quantitatively add polyepoxysuccinic acid and dispersant into the preparation tank 1 through a liquid inlet pipe;

[0047] As Figure 2 shown, a tank cover 2 is arranged on the top of the preparation tank 1, a feeding block 3 is arranged on the tank cover 2, several storage cavities 4 are arranged in the feeding block 3, a quantitative addition mechanism is arranged below the storage cavity 4, and the quantitative addition mechanism is used to quantitatively add different preparation raw materials into the preparation tank 1. A stirring mechanism is arranged 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 the circulating water, thereby inhibiting the corrosion of the circulating water conveying pipeline, effectively preventing the occurrence of scaling and corrosion phenomena in the circulating water, having scale and corrosion inhibition properties, and moreover, the scale and corrosion inhibitor does not contain phosphorus, avoiding water eutrophication and contributing to maintaining ecological balance;

[0049] When preparing the corrosion inhibitor, different preparation raw materials are first added into 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, through the quantitative addition mechanism in the feeding block 3, the solid raw materials can be quantitatively added into the preparation tank 1. At the same time, polyepoxysuccinic acid and dispersant are quantitatively added into the preparation tank 1 through the liquid inlet pipe 23. Deionized water is pre-added into the preparation tank 1. During the addition process of the preparation raw materials, the stirring mechanism is started to stir the solution, so that the solid raw materials are fully dissolved and uniformly mixed in the solution. During the stirring process, the solid raw materials are automatically put into the preparation tank 1 through the quantitative addition mechanism, and the feeding time is 0.3h. After 1h of stirring, a phosphorus-free scale and corrosion inhibitor is finally prepared. In the present invention, through the quantitative addition mechanism, different solid raw materials can be quantitatively added into the preparation tank 1, realizing the batch-by-batch quantitative feeding of the solid raw materials, avoiding excessive feeding of the solid raw materials, being beneficial to controlling the feeding amount of the solid raw materials, saving the preparation cost of the phosphorus-free scale and corrosion inhibitor. Moreover, the batch-by-batch quantitative feeding of the solid raw materials can avoid over-rapid local reaction or accumulation and caking of the solid raw materials in the preparation tank 1, ensure the smooth progress of the preparation process of the phosphorus-free scale and corrosion inhibitor, improve the reliability of the preparation of the corrosion inhibitor, ensure the corrosion inhibition effect of the corrosion inhibitor, and improve the preparation quality and product consistency of the phosphorus-free scale and corrosion inhibitor.

[0050] Example 2

[0051] On the basis of the above Example 1, as Figure 3 shown, a dust-proof cover 5 is provided on the tank cover 2, and the dust-proof cover 5 covers the outside of the feeding block 3.

[0052] The working principle and beneficial effects of the above technical solution are as follows: The outside of the feeding block 3 is covered with a dust-proof cover 5. Through the dust-proof cover 5, the storage chamber 4 of the feeding block 3 can be dust-proof, avoiding impurities from mixing into the solid raw materials in the storage chamber 4, and 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 Figures 2 - 5 shown, the quantitative addition mechanism includes a sliding chamber. The sliding chamber is arranged below the storage chamber 4. The lower end of the storage chamber 4 is communicated with the sliding chamber through a feeding hole 6. A feeding pipe 7 is arranged below the sliding chamber, and the lower end of the feeding pipe 7 extends into the preparation tank 1. The sliding chamber is communicated with the feeding pipe 7 near the upper end through a plurality of communication holes 8. A sliding plate 9 is slidably arranged in the sliding chamber, and a plurality of quantitative holes 10 are arranged in the sliding plate 9;

[0055] A plurality of quantitative holes 10, feeding holes 6 and communication 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 within the sliding cavity, and the right end of the sliding plate 9 extends outside the feeding block 3. During production, first push the sliding plate 9 to the leftmost position. At this time, the quantitative hole 10 in the sliding plate 9 communicates 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 quantitative hole 10 is filled with the solid raw material, pull the sliding plate 9 to the right so that the quantitative hole 10 is aligned with the corresponding communication hole 8. The quantitatively measured solid raw material in the quantitative hole 10 can then flow into the feeding pipe 7 through the communication hole 8 and then be quantitatively put into the preparation tank 1. After the solid raw material is put in, push the sliding plate 9 to the leftmost position of the sliding cavity again to obtain the solid raw material again. By repeating the above steps, the quantitative feeding of the solid raw material can be realized. Through the quantitative feeding of the solid raw material, the feeding amount of the solid raw material can be accurately controlled, avoiding excessive input and saving the preparation cost. The connecting pipe is provided with an inclined section and is connected to the feeding pipe 7 through the inclined section, which facilitates the solid raw material to flow into the feeding pipe 7.

[0057] Example 4

[0058] On the basis of Example 3, as Figure 5 shown, the upper end of the communication 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 communication hole 8 is larger than the diameter of the lower end of the communication hole 8, and the diameter of the upper end of the communication 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 communication hole 8, preventing the solid raw material from remaining in the quantitative hole 10 and improving the reliability of the quantitative feeding of the solid raw material.

[0060] Example 5

[0061] On the basis of Example 3 or 4, as Figure 2 shown, the quantitative adding mechanism further includes a driving component for driving the sliding plate 9 to reciprocate left and right along the sliding cavity. The driving component includes a fixing plate arranged on the tank cover 2. A driving motor 11 is arranged on the front side of the fixing plate. The output end of the driving motor 11 is provided with a driving rod 12. The end of the driving rod 12 away from the driving motor 11 is connected to a moving block 14 through a connecting rod 13. The moving block 14 is slidably arranged on a pulling plate 15. One end of the pulling plate 15 is connected to one end of the sliding plate 9. First fixing blocks 16 and second fixing blocks 17 are arranged at intervals on the pulling plate 15. The moving block 14 is located between the first fixing block 16 and the second fixing block 17.

[0062] The working principle and beneficial effects of the above technical solution are as follows: Start the drive motor 11. The rotation of the drive motor 11 can drive the drive rod 12 to rotate. One end of the drive rod 12 is hinged to the connecting rod 13, and the other end of the connecting rod 13 is hinged to the moving block 14. When the drive rod 12 rotates, it drives the moving block 14 to slide back and forth left and right on the pull plate 15 through the connecting rod 13. When the moving block 14 contacts the first fixed block 16 on the left, it can push the first fixed block 16 to move towards the feeding block 3. The first fixed block 16 drives the pull plate 15 to move towards the sliding cavity. The pull plate 15 drives the sliding plate 9 to slide in the sliding cavity until the sliding plate 9 contacts the left inner wall of the sliding cavity. At this time, the quantitative hole 10 is communicated 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 away from the feeding block 3. The moving block 14 first slides along the upper surface of the pull 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, providing sufficient time for the solid raw material to flow into the quantitative hole 10 and improving 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. The second fixed block 17 drives the pull plate 15 to move away from the feeding block 3. The pull plate 15 drives the sliding plate 9 to slide outwards. When the end of the drive rod 12 is at the rightmost position, the quantitative hole 10 is communicated with the upper end of the communication hole 8. As the drive rod 12 rotates, the moving block 14 slides on the pull plate 15 towards the first fixed block 16. Before the moving block 14 contacts the first fixed block 16, the pull plate 15 does not move. During the sliding process of the moving block 14, the solid raw material in the quantitative hole 10 can fully flow into the communication hole 8, avoiding the residue of solid raw material in the quantitative hole 10 and ensuring the quantitative feeding of solid raw material into the preparation tank 1. By setting the drive assembly, the sliding plate 9 can move back and forth left and right with a gap in the sliding cavity, thereby realizing the automatic feeding of solid raw material, not only ensuring the quantitative feeding of solid raw material but also improving the preparation efficiency of the phosphorus-free scale and corrosion inhibitor.

[0063] Example 6

[0064] On the basis of any one of Examples 1-5, as Figure 3 shown, the stirring mechanism includes a stirring shaft 18. The stirring shaft 18 is arranged in the preparation tank 1. 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. 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 preparation raw materials are put into the preparation tank 1, the stirring motor 20 is started. The rotation of the stirring motor 20 drives the rotation of the stirring blades 19, thereby stirring the preparation raw materials in the preparation tank 1, enabling the various preparation raw materials to be evenly mixed and fully react, and thus preparing the phosphorus-free scale and corrosion inhibitor.

[0066] Example 7

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

[0068] A shunt 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 shunt pipe 26.

[0069] The working principle and beneficial effects of the above technical solution are as follows: The solid raw materials fall into the spiral mixing pipe 22 through the feeding pipe 7, and then the liquid supply pump 25 is started, which can transport the preparation solution into the liquid supply pipe 24. The preparation solution is a liquid raw material, and the liquid raw materials include polyepoxysuccinic acid, dispersant and deionized water. Different liquid raw materials are transported into the liquid supply pipe 24 through different liquid supply pumps 25, and then converge into the mixing cylinder 21. After preliminary mixing in the mixing cylinder 21, they quickly flow into the spiral mixing pipe 22. The liquid raw materials are mixed with the solid raw materials and drive the solid raw materials to be further mixed in the spiral mixing pipe 22, which helps the preliminary dissolution of the solid raw materials. Finally, the mixed raw materials are evenly injected into the preparation solution in the preparation tank 1 through the injection ports of the shunt pipe 26. Through the impact of the liquid raw materials on the solid raw materials, it is possible to prevent the solid raw materials from remaining in the spiral mixing pipe 22, ensuring the quantitative feeding of the solid raw materials, and the liquid raw materials can preliminarily dissolve the solid raw materials, so as to fully dissolve the small-particle solid raw materials, avoid the small-particle solid raw materials floating on the surface of the preparation solution in the preparation tank 1 and affecting the reaction efficiency, enhance the mixing efficiency of the liquid raw materials and the solid raw materials, improve the preparation efficiency of the phosphorus-free scale and corrosion inhibitor, reduce the preparation time, and save the preparation cost.

[0070] Example 8

[0071] On the basis of any one of Examples 1-7, as Figure 2 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, Figures 3 - 7 As shown, a capacity control component is arranged 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 arranged, 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 arranged through the arc plate 28, and a baffle plate 30 is arranged 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, and the baffle plate 30 is made of elastic material, and an annular mounting cavity 32 is arranged in the sliding plate 9, and the annular mounting cavity 32 is connected to the metering hole 10, and 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 arranged 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 vary, resulting in different total feeding amounts of different solid raw materials, to ensure the preparation efficiency, when feeding solid raw materials, the single feeding amount of different solid raw materials in different storage cavities 4 is different. To adapt to different feeding amounts, a capacity control component is arranged in the metering hole 10. When the metering hole 10 is aligned with the feeding hole 6, the solid raw materials in the storage cavity 4 can flow through the feeding hole 6 into the space surrounded by the four arc-shaped plates 28 and the four enclosing baffles 30. The size of the space surrounded by the four arc-shaped plates 28 and the four enclosing baffles 30 is the single feeding amount of the solid raw materials. The capacity control component can be adaptively adjusted according to the metered feeding amounts of different solid raw materials. Specifically, the arc-shaped plate 28 can be pushed by the pushing component to move away from the annular installation cavity 32 in the metering hole 10. The enclosing baffle 30 in the arc-shaped plate 28 is made of an elastic plate. Therefore, as the arc-shaped plate 28 moves inward, the distance between two adjacent arc-shaped plates 28 decreases. One end of the enclosing baffle 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 enclosing baffle 30 can slide in the arc-shaped through hole 29 in the adjacent arc-shaped plate 28. The space surrounded by the four arc-shaped plates 28 and the four enclosing baffles 30 gradually decreases, thereby reducing the single feeding amount of the solid raw materials. When the pushing component drives the arc-shaped plate 28 to move towards the annular installation cavity 32, the space surrounded by the four arc-shaped plates 28 and the four enclosing baffles 30 gradually expands, thereby increasing the single feeding amount of the solid raw materials. Through the capacity control component, the single feeding amount of the corresponding solid raw materials can be flexibly adjusted, facilitating the automatic feeding of different solid raw materials.

[0076] Example 10

[0077] On the basis of Example 9, as Figure 6 、 Figure 7As shown in the figure, the pushing component includes a fixed ring 33, which is arranged on the bottom wall of the annular installation cavity 32. On the upper surface of the fixed ring 33, a chute 34 corresponding to the arc-shaped plate 28 is provided. A slider 35 is slidably arranged in the chute 34. One end of the slider 35 is connected to the inner wall of the chute 34 through a return spring 36. The upper end of the slider 35 is connected to the outer wall of the arc-shaped plate 28 through a fixed rod 37. A gear ring 38 is arranged outside the fixed ring 33. A number 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. A number of arc-shaped racks 40 are arranged on the inner wall of the gear ring 38. The number of arc-shaped racks 40 corresponds to the slider 35 one by one. A rotating shaft 41 is arranged 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 installation cavity 32. A first gear 42 is arranged on the rotating shaft 41. The first gear 42 meshes with the arc-shaped rack 40. A connecting rope 43 is arranged 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 arranged in the annular installation cavity 32. A first rack 45 is arranged at the output end of the electric push rod 44. The first rack 45 meshes with the outer wall of the gear ring 38.

[0078] The working principle and beneficial effects of the above technical solution are as follows: When it is necessary to reduce the space enclosed by the four arc-shaped plates 28 and the four enclosing baffles 30, the electric push rod 44 is controlled to push out. 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 a plurality of arc-shaped racks 40 on the inner wall to rotate. The arc-shaped racks 40 correspond to the sliders 35 one by one. When the arc-shaped 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 rotation shaft 41 to rotate. The rotation shaft 41 rotates to release the connecting rope 43. Under the action of the return spring 36, the slider 35 slides along the chute 34 away from the rotation shaft 41. The slider 35 drives the arc-shaped plate 28 to move away from the rotation shaft 41 through the fixed rod 37, so that the space enclosed by the four arc-shaped plates 28 and the four enclosing baffles 30 is reduced, and the single feeding amount of the solid raw material is decreased. When the electric push rod 44 is controlled to retract, the gear ring 38 rotates in the reverse direction. The arc-shaped rack 40 drives the first gear 42 to rotate in the reverse direction. The rotation shaft 41 rotates in the reverse direction, and the connecting rope 43 is wound around the rotation shaft 41. The slider 35 slides towards the rotation shaft 41, and the return spring 36 is compressed. The slider 35 drives the arc-shaped plate 28 to move towards the rotation shaft 41 through the fixed rod 37, so that the space enclosed by the four arc-shaped plates 28 and the four enclosing baffles 30 is increased, and the single feeding amount of the solid raw material is enlarged. The adjustment of the single feeding amount of the solid raw material is realized. A real-time monitoring device is arranged in the preparation tank 1. The real-time monitoring device can be selected according to the type of the solid raw material. The real-time monitoring device can be a pH value detection sensor or a conductivity sensor. Through the monitoring result of the real-time monitoring device, the actual content of each solid raw material dissolved in the preparation solution can be obtained. A controller is arranged outside the preparation tank 1. The controller is electrically connected to the real-time monitoring device and the electric push rod 44 respectively. Based on the monitoring result of the real-time monitoring device, the controller can compare the actual content of each solid raw material dissolved in the solution 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, so that the space enclosed by the four arc-shaped plates 28 and the four enclosing baffles 30 is increased, and the single feeding amount of the solid raw material is enlarged. When the actual content is within the preset content range, the electric push rod 44 remains stationary, and the single feeding amount of the solid raw material remains unchanged. When the actual content is greater than the preset content range, the controller controls the electric push rod 44 to push out, so that the space enclosed by the four arc-shaped plates 28 and the four enclosing baffles 30 is reduced, and the single feeding amount of the solid raw material is decreased. Each single capacity control component can be automatically adjusted according to the corresponding solid raw material, realizing the automatic adjustment of the feeding amount, improving the preparation efficiency of the phosphorus-free scale and corrosion inhibitor. By automatically adjusting the single feeding amount of the solid raw material, the single feeding amount of the solid raw material is made more accurate, avoiding waste caused by excessive feeding of the solid raw material, saving the preparation cost of the phosphorus-free scale and corrosion inhibitor, and further improving the reliability of the scale and corrosion inhibitor preparation and enhancing the scale and corrosion inhibition effect of the scale and corrosion inhibitor.

[0079] Example 11

[0080] Based on Example 10, as Figures 7 - 9 shown, a knocking mechanism is arranged on the outer side of the arc-shaped plate 28. The knocking mechanism is used to knock the outer side of the arc-shaped plate 28. The knocking mechanism includes a support block 46. The support block 46 is arranged on the fixed ring 33. A second rack 47 is arranged on the support block 46. A rotating shaft 48 is arranged above the second rack 47. Both ends of the rotating shaft 48 are rotatably connected to the mounting rod 49. 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 arranged on the rotating shaft 48. The second gear 50 meshes with the second rack 47. A spring rod 51 is arranged on the rotating shaft 48. A knocking ball 52 is arranged 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 formed by the four arc-shaped plates 28 and the four baffle plates 30 moves to directly above the communication hole 8, the solid raw material can flow into the communication hole 8. When the sliding plate 9 is stationary, the electric push rod 44 is started. The electric push rod 44 first pushes out, so that the space formed by the four arc-shaped plates 28 and the four baffle plates 30 is reduced. As the space is reduced, it is beneficial for all the solid raw materials to flow out. At the same time, by sliding the baffle plate 30 in the arc-shaped through hole 29, the solid raw materials adhered to the inner wall of the baffle plate 30 can be scraped off to avoid raw material residue; then the electric push rod 44 retracts until the four arc-shaped plates 28 and the four baffle plates 30 return to their original positions for the next material taking; during the movement of the arc-shaped plate 28, the arc-shaped plate 28 drives the rotating shaft 48 to move through the mounting rod 49. The second gear 50 on the rotating shaft 48 meshes 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 arranged at one end of the spring rod 51 can knock the arc-shaped plate 28 during the movement of the arc-shaped plate 28, so as to shake off the solid raw materials adhered to the arc-shaped plate 28 and avoid the solid raw materials remaining on the arc-shaped plate 28, further improving the accuracy of the single-time feeding of the solid raw materials.

[0082] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A phosphorus-free scale and corrosion inhibitor, characterized in that: 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. 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. A phosphorus-free scale and corrosion inhibitor according to claim 1, characterized in that: Azole compounds include, but are not limited to, benzotriazole or tolyltriazole.

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

5. A method for preparing a phosphorus-free scale and corrosion inhibitor, used for preparing a phosphorus-free scale and corrosion inhibitor as claimed in any one of claims 1 to 4, 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 the preparation tank, a phosphorus-free scale and corrosion inhibitor is prepared.

6. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 5, characterized in that: The raw materials are quantitatively added to the preparation tank at equal time intervals, including: The polyaspartic acid, the inorganic metal salt and the azole compound are quantitatively added into the preparation tank through the quantitative adding mechanism; Polyepoxysuccinic acid and dispersant are quantitatively added into the preparation tank through the liquid inlet pipe.

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

8. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 7, characterized in that: The time for adding raw materials is less than 0.5h.

9. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 6, characterized in that: A tank cover is arranged on the top of the preparation tank, a feeding block is arranged on the tank cover, a plurality of storage cavities are arranged in the feeding block, a quantitative adding mechanism is arranged 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 arranged in the preparation tank, and the stirring mechanism is used to stir the solution in the preparation tank.

10. The method for preparing a phosphorus-free scale and corrosion inhibitor according to claim 9, characterized in that: A mixing cylinder is arranged at the bottom of the tank cover, a spiral mixing tube is arranged at the lower end of the mixing cylinder, a liquid inlet pipe is arranged on the side wall of the mixing cylinder, the liquid inlet pipe extends to the outside of the preparation tank away from one end of the mixing cylinder and is provided with a plurality of liquid supply pipes, and a liquid supply pump is arranged on the liquid supply pipe.

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