Reaction equipment for chelating humic acid with medium trace elements and reaction method thereof

Abstract

The invention discloses reaction equipment for chelating humic acid with medium trace elements and a reaction method thereof, and relates to the technical field of reaction kettles.The reaction equipment comprises a reaction kettle main body, a pre-reaction mechanism communicated with the reaction kettle main body is arranged at the upper end of the reaction kettle main body, and a heat preservation jacket is arranged on the outer end face of the reaction kettle main body; a first water inlet and a first water outlet which are communicated with the heat preservation jacket are formed in the side end face of the heat preservation jacket, a humic acid feeding opening, an access hole and a gear motor are arranged on the upper end face of the reaction kettle main body, a stirring shaft which is rotationally connected is arranged in the reaction kettle main body, and the stirring shaft is mounted on an output shaft of the gear motor; the fixed shaft is fixedly mounted on the upper end surface of the reaction kettle main body. The device has the advantages of efficient mixing, uniform heating, stable operation and uniform material dispersion, and solves the problems of non-uniform mixing of metal salt and organic acid, incomplete reaction and low product purity in the traditional method.

Description

Technical Field

[0001] The invention relates to the technical field of reactors, in particular to reaction equipment for chelating trace elements in humic acid and a reaction method thereof. Background Art

[0002] The technology of chelating trace elements with humic acid is widely used in agriculture, feed additives and nutritional supplements. By combining metal ions with organic ligands (such as humic acid) to form stable complexes, the absorption efficiency of trace elements by plants can be improved, while reducing the environmental problems that may be caused by the direct application of metal ions.

[0003] The traditional production method is to directly react organic acid salts with humic acid, and metal salts compete with humic acid for chelation. If the metal salts and organic acids are not fully mixed, it may lead to incomplete reaction or low product purity, affecting the quality of the final product. In large-scale production, how to ensure that the materials can be evenly distributed in the entire reaction system is a difficult problem. Uneven material distribution will not only reduce reaction efficiency, but also may lead to unstable product performance. Therefore, a reaction device and a reaction method for chelating trace elements in humic acid are needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a reaction device and a reaction method for chelating trace elements in humic acid, which have the advantages of efficient mixing, uniform heating, stable operation and uniform dispersion of materials, and solve the problems of uneven mixing of metal salts and organic acids, incomplete reaction and low product purity in traditional methods.

[0005] To achieve the above object, the present invention provides the following technical solution: a reaction device for chelating trace elements in humic acid, comprising a reactor body, characterized in that: a pre-reaction mechanism communicating with the reactor body is provided at the upper end of the reactor body;

[0006] The outer end surface of the reactor body is provided with a heat-insulating jacket, the side end surface of the heat-insulating jacket is provided with a first water inlet and a first water outlet which are connected therewith, the upper end surface of the reactor body is provided with a humic acid feeding port, an inspection hole and a reduction motor, and a rotatably connected stirring shaft is provided in the reactor body, and the stirring shaft is installed on the output shaft of the reduction motor;

[0007] The pre-reaction mechanism includes a rotating drum and a fixed shaft, wherein the fixed shaft is fixedly mounted on the upper end surface of the reactor body, the rotating drum is sleeved on the fixed shaft and rotatably connected thereto, a feed pipe penetrating the reactor body is provided at the bottom of the fixed shaft, a through hole penetrating the feed pipe is provided on the side end surface of the fixed shaft, and an electromagnetic valve is provided on the feed pipe.

[0008] As a preferred reaction equipment for chelating trace elements in humic acid of the present invention, the side end face of the stirring shaft is provided with a first synchronous wheel, the side end face of the rotating drum is provided with a second synchronous wheel matching with the first synchronous wheel, the outer end faces of the first synchronous wheel and the second synchronous wheel are sleeved with a synchronous belt for transmission, and the reduction motor drives the rotating drum through the first synchronous wheel, the second synchronous wheel and the synchronous belt.

[0009] As a preferred reaction device for chelating trace elements in humic acid of the present invention, a support frame for supporting a rotating drum is arranged on the top of the side end surface of the reactor body, and a sleeve ring rotatably connected to the rotating drum is arranged on the side end surface of the support frame.

[0010] As a preferred reaction equipment for chelating trace elements in humic acid of the present invention, the top of the rotating drum is provided with an auxiliary material feeding port, the inner end surface of the rotating drum is provided with a first spiral blade, the top center of the fixed axis is provided with a heating rod, the outer end surface of the heating rod is provided with a second spiral blade, and the spiral directions of the first spiral blade and the second spiral blade are opposite.

[0011] As a preferred reaction device for chelating trace elements in humic acid of the present invention, the inner wall of the fixed axis is provided with a heat medium chamber, and the left and right sides of the fixed axis are respectively provided with a second water inlet and a second water outlet which are connected to the heat medium chamber.

[0012] As a preferred reaction device for chelating trace elements in humic acid of the present invention, the heat medium chamber is a circular ring cavity, a partition is arranged in the annular flow channel, and a water-permeable hole is left between the top of the partition and the heating rod.

[0013] As a preferred reaction device for chelating trace elements in humic acid of the present invention, the side end face of the stirring shaft is provided with a dispersion disk, a first stirring blade and a second stirring blade, and the edge of the second stirring blade is provided with a scraper that fits with the inner wall of the reactor.

[0014] As a preferred reaction equipment for chelating trace elements in humic acid of the present invention, guide pipes are evenly arranged between the dispersion disk and the stirring shaft, a through hole communicating with the guide pipe is arranged at the bottom of the dispersion disk, a spray hole is arranged at the bottom of the guide pipe, and the feed pipe is located above the dispersion disk.

[0015] As a preferred reaction device for chelating trace elements in humic acid of the present invention, the dispersion plate is a circular ring structure, the edge of the dispersion plate is provided with an anti-overflow flange, and the central axis of the guide pipe has an angle of five to ten degrees with the horizontal plane.

[0016] A reaction method for chelating trace elements in humic acid comprises the following steps:

[0017] Step 1, raw material preparation, humic acid is fed into the reactor body through the humic acid feeding port, and raw materials such as metal salts and organic acids are fed into the rotating drum of the pre-reaction mechanism through the auxiliary material feeding port;

[0018] Step 2: Pre-reaction is started, and raw materials such as metal salt and organic acid are pre-reacted in the drum to produce an organic acid complex;

[0019] Step 3: The main reaction is carried out, and the organic acid complex is put into the main body of the reactor to react with humic acid to produce the final desired chelate;

[0020] Step 4, product collection: after the main reaction is completed, the desired chelate is collected through the discharge port, and after the equipment is stopped, the reactor body and the pre-reaction mechanism are cleaned.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention adopts the relative motion design of the drum and the fixed axis in the pre-reaction mechanism, combined with the reverse spiral structure of the first spiral blade and the second spiral blade, so that the auxiliary material forms a stable circulation in the drum and enhances the mixing effect; at the same time, the fixed axis has a built-in heat medium chamber and a baffle diversion design, which cooperates with the heating rod and the second spiral blade to achieve uniform heating of the auxiliary material. This structure solves the problems of insufficient material mixing and uneven temperature distribution in traditional pre-reactions, and significantly improves the pre-reaction rate of metal salts and organic acids. The synchronous belt transmission system, driven by the reduction motor, links the drum and the stirring shaft, which not only simplifies the power configuration, but also ensures the coordinated operation of the pre-reaction and the main reaction, avoids eccentric vibration of the equipment, and extends the service life.

[0023] 2. A layered stirring structure is adopted in the reactor body of the present invention. The dispersion plate forms an annular flow channel through the guide pipe and the spray hole, so that the pre-reaction product is evenly sprayed onto the surface of the humic acid. Combined with the first and second stirring blades and the scraper on the stirring shaft, multi-dimensional mixing of the materials is achieved. The scraper is fitted with the inner wall of the reactor to effectively remove the materials attached to the bottom, avoiding the problems of incomplete reaction or uneven heat dissipation caused by local material accumulation. The coordination of the inclination angle of the guide pipe and the anti-overflow flange further ensures the continuous and uniform distribution of the solution, solves the problems of uneven material dispersion and high residual rate in the traditional process, and improves the integrity of the chelating reaction and the consistency of the product.

[0024] 3. The present invention uses an independent cavity design of the pre-reaction mechanism to enable the organic acid and the metal salt to complete the pre-mixing and complexing reaction in the rotating drum first to generate a stable organic acid-metal complex. The reverse motion of the first and second spiral blades in the rotating drum and the temperature control of the heating rod accelerate the formation of the complex. After the pre-reaction product enters the main reactor through the discharge pipe, the humic acid only needs to combine with the complexed metal ions instead of directly competing for free metal ions. This step-by-step reaction mechanism isolates the chelation process of the organic acid and humic acid in space and time, effectively avoiding the chelation site conflict, product hybridization and decreased chelation efficiency caused by competitive binding during multi-component synchronous reactions. At the same time, the annular flow channel of the dispersion disk and the spray structure of the guide pipe ensure that the complex is evenly dispersed in the humic acid, further reducing the residual local uncomplexed metal ions, thereby significantly improving the purity and stability of the final chelated product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 A top view of the present invention;

[0027] Figure 3 For the present invention Figure 2 Schematic diagram of the AA section structure;

[0028] Figure 4 It is a schematic diagram of the coordination state between the stirring shaft and the pre-reaction mechanism of the present invention;

[0029] Figure 5 It is a cross-sectional structural schematic diagram of the coordination state between the stirring shaft and the pre-reaction mechanism of the present invention;

[0030] Figure 6 It is a front cross-sectional view of the pre-reaction mechanism of the present invention;

[0031] Figure 7 It is an exploded view of the pre-reaction mechanism of the present invention;

[0032] Figure 8 It is a schematic diagram of the fixed-axis cross-section structure of the present invention;

[0033] Fig. 9 For the present invention Figure 5 Enlarged view of point B in the middle;

[0034] Fig.10 For the present invention Figure 8 Enlarged view of point C in the middle.

[0035] In the figure: 1. Reactor body; 101. Insulation jacket; 1011. First water inlet; 1012. First water outlet; 102. Humic acid feeding port; 103. Inspection hole; 104. Speed ​​reducer; 1041. First synchronous wheel; 1042. Synchronous belt; 105. Stirring shaft; 1051. Dispersing disc; 10511. Through hole; 15012. Anti-overflow flange; 1052. Material guide pipe; 10521. Spray hole; 1053. First stirring blade; 1054. Second stirring blade; 10541. Scraper; 1 06. Discharge port; 2. Pre-reaction mechanism; 201. Rotating drum; 2011. Second synchronous wheel; 2012. Auxiliary material feeding port; 2013. First spiral blade; 202. Fixed axis; 2021. Heating rod; 2022. Second spiral blade; 2023. Heat medium chamber; 20231. Second water inlet; 20232. Second water outlet; 20233. Partition; 20234. Water permeable hole; 2024. Solenoid valve; 2025. Through hole; 2026. Feeding pipe; 203. Support frame; 2031. Ring. DETAILED DESCRIPTION

[0036] Example 1

[0037] See also Figure 1-Figure 10 , a reaction device for chelating trace elements in humic acid, comprising a reactor body 1, the upper end of which is provided with a pre-reaction mechanism 2 which is in communication with the reactor body 1;

[0038] The outer end surface of the reactor body 1 is provided with a heat-insulating jacket 101, and the side end surface of the heat-insulating jacket 101 is provided with a first water inlet 1011 and a first water outlet 1012 which are connected therewith. The upper end surface of the reactor body 1 is provided with a humic acid feeding port 102, a maintenance hole 103 and a reduction motor 104. A rotatably connected stirring shaft 105 is provided in the reactor body 1, and the stirring shaft 105 is installed on the output shaft of the reduction motor 104.

[0039] The pre-reaction mechanism 2 includes a rotating drum 201 and a fixed shaft 202. The fixed shaft 202 is fixedly installed on the upper end surface of the reactor body 1. The rotating drum 201 is sleeved on the fixed shaft 202 and is rotatably connected thereto. A feed pipe 2026 that passes through the reactor body 1 is provided at the bottom of the fixed shaft 202. A through hole 2025 that passes through the feed pipe 2026 is provided on the side end surface of the fixed shaft 202. A solenoid valve 2024 is provided on the feed pipe 2026.

[0040] Furthermore, a first synchronous wheel 1041 is provided on the side end surface of the stirring shaft 105, and a second synchronous wheel 2011 cooperating with the first synchronous wheel 1041 is provided on the side end surface of the rotating drum 201. The outer end surfaces of the first synchronous wheel 1041 and the second synchronous wheel 2011 are sleeved with a synchronous belt 1042 for transmission, and the reduction motor 104 drives the rotating drum 201 through the cooperation of the first synchronous wheel 1041, the second synchronous wheel 2011 and the synchronous belt 1042.

[0041] The reduction motor 104 drives the stirring shaft 105 to rotate, and at the same time drives the rotating drum 201 to rotate, so that the rotating drum 201 and the fixed shaft 202 produce relative movement, so that the rotating drum 201 and the fixed shaft 202 can fully mix the auxiliary materials in the rotating drum 201, thereby increasing the reaction speed of the metal salt and the organic acid, thereby further improving the production efficiency.

[0042] Furthermore, a support frame 203 for supporting the drum 201 is disposed on the top of the side end surface of the reactor body 1 , and a sleeve ring 2031 rotatably connected to the drum 201 is disposed on the side end surface of the support frame 203 .

[0043] The drum 201 is supported by the sleeve ring 2031 on the support frame 203, so that the drum 201 can rotate stably, so that the eccentricity of the sleeve during the feeding process causes the equipment to shake, which improves the stability of the equipment, reduces the wear of the equipment, and increases the service life of the equipment.

[0044] Furthermore, a supplementary material feeding port 2012 is provided at the top of the rotating drum 201, a first spiral blade 2013 is provided on the inner end surface of the rotating drum 201, a heating rod 2021 is provided at the top center of the fixed axis 202, a second spiral blade 2022 is provided on the outer end surface of the heating rod 2021, and the spiral directions of the first spiral blade 2013 and the second spiral blade 2022 are opposite.

[0045] When the drum 201 rotates, the first spiral blade 2013 on the inner end surface of the drum 201 drives the auxiliary material to roll downward for mixing. Since the fixed axis 202 also moves relative to the drum 201, the second spiral blade 2022 on the surface of the heating rod 2021 drives the central auxiliary material to roll upward for mixing, thereby generating a stable circulation of the material in the drum 201, further improving the pre-reaction rate of the metal salt and the organic acid. At the same time, the second spiral blade 2022 increases the contact area between the heating rod 2021 and the auxiliary material, further improving the uniformity of heating the auxiliary material.

[0046] Furthermore, a heat medium chamber 2023 is disposed on the inner wall of the fixed shaft 202 , and a second water inlet 20231 and a second water outlet 20232 which are connected to the heat medium chamber 2023 are disposed on the left and right sides of the fixed shaft 202 .

[0047] Hot water is injected into the fixed axis 202 through the second water inlet 20231, so that the hot water passes through the heat medium chamber 2023 and is discharged from the second water outlet 20232, so that the fixed axis 202 heats the auxiliary materials inside the rotating drum 201, allowing the organic acid and the metal salt to react quickly at a suitable temperature, further improving the reaction rate of the pre-reaction.

[0048] Furthermore, the heat medium chamber 2023 is a circular ring-shaped cavity, a partition 20233 is arranged in the annular flow channel, and a water-permeable hole 20234 is left between the top of the partition 20233 and the inner end surface of the heating rod 2021.

[0049] The partition 20233 divides the heat medium chamber 2023 into two left and right areas. The second water inlet 20231 is on the right side of the partition 20233, and the second water outlet 20232 is on the left side of the partition 20233. After the hot water enters the heat medium chamber 2023, it must reach the top of the partition 20233 before it can pass over the partition 20233 and enter the heat medium chamber 2023 on the left, thereby allowing the hot water to flow through the entire heating rod 2021, avoiding overheating of the bottom of the fixed axis 202, and preventing the upper end of the fixed axis 202 from losing the heating function, thereby improving the heating stability of the fixed axis 202.

[0050] Furthermore, a dispersion disk 1051 , a first stirring blade 1053 and a second stirring blade 1054 are provided on the side end surface of the stirring shaft 105 , and a scraper 10541 that fits against the inner wall of the reactor is provided on the edge of the second stirring blade 1054 .

[0051] The stirring shaft 105 drives the first stirring blade 1053 and the second stirring blade 1054 to rotate, stir and mix the materials in the reactor body 1, and improve the reaction rate of the humic acid and organic acid complex reaction. The scraper 10541 on the second stirring blade 1054 can scrape the materials at the bottom of the inner end surface of the reactor body 1 to prevent the materials from adhering to the bottom for a long time and affecting the reaction heat dissipation, and at the same time facilitate the emptying of the reactor body 1 when discharging the materials.

[0052] Furthermore, a material guide pipe 1052 is evenly arranged between the dispersion disk 1051 and the stirring shaft 105 , a through hole 10511 penetrating the material guide pipe 1052 is arranged at the bottom of the dispersion disk 1051 , a spray hole 10521 is arranged at the bottom of the material guide pipe 1052 , and a feed pipe 2026 is located above the dispersion disk 1051 .

[0053] The organic acid complex solution produced by the reaction in the pre-reaction mechanism 2 falls onto the dispersion disk 1051 through the discharge pipe 2026, then flows into the guide pipe 1052 through the through hole 10511, and is discharged through the spray hole 10521 at the bottom of the guide pipe 1052. Under the rotation of the stirring shaft 105, the organic acid complex solution is evenly sprinkled on the surface of the humic acid, thereby improving the uniformity of the raw material mixing, further improving the reaction rate and product quality.

[0054] Furthermore, the dispersion disk 1051 is a circular ring structure, and an anti-overflow flange 15012 is provided on the edge of the dispersion disk 1051. There is an angle of five to ten degrees between the central axis of the guide tube 1052 and the horizontal plane.

[0055] When the device is in use, hot water is introduced into the heat medium chamber 2023 of the fixed axis 202 through the second water inlet 20231, and the hot water is discharged from the second water outlet 20232 through the heat medium chamber 2023 to heat the auxiliary materials inside the drum 201, so that the organic acid and the metal salt are pre-reacted at a suitable temperature, the auxiliary material feeding port 2012 on the top of the drum 201 is opened, and the metal salt and the organic acid solution are fed into the drum 201. At the same time, the humic acid raw material is fed through the humic acid feeding port 102 on the upper end face of the reactor body 1, and the reduction motor 104 is started. The output shaft of the reduction motor 104 drives the stirring shaft 105 to rotate. At the same time, the first synchronous wheel 1041 on the side end face of the stirring shaft 105 drives the first synchronous wheel 1042 on the side end face of the drum 201 to rotate. The second synchronous wheel 2011 rotates, so that the drum 201 rotates around the fixed axis 202, and the drum 201 and the fixed axis 202 generate relative motion. The first spiral blade 2013 in the drum 201 drives the auxiliary material to roll downward when the drum 201 rotates, and the second spiral blade 2022 on the outer end surface of the central heating rod 2021 at the top of the fixed axis 202 drives the central auxiliary material to roll upward due to the relative motion of the fixed axis 202 with respect to the drum 201, so that the materials form a stable circulation in the drum 201, which is fully mixed, and the pre-reaction rate of the metal salt and the organic acid is increased. The heating rod 2021 heats the auxiliary material at the same time, and the second spiral blade 2022 increases the contact area between the heating rod 2021 and the auxiliary material, making the heating more uniform. When the pre-reaction is completed, the auxiliary material is heated by the second spiral blade 2022. A water inlet 1011 is used to introduce cold water into the insulation jacket 101 to maintain a suitable temperature environment in the reactor body 1 to meet the temperature requirements of the humic acid chelating reaction. The solenoid valve 2024 on the feed pipe 2026 is opened, and the organic acid complex solution produced by the pre-reaction falls onto the dispersion plate 1051 through the feed pipe 2026. The organic acid complex solution flows into the guide pipe 1052 through the through hole 10511 at the bottom of the dispersion plate 1051, and then through the spray hole 10521 at the bottom of the guide pipe 1052, it is evenly sprinkled on the surface of the humic acid under the rotation of the stirring shaft 105, so as to improve the uniformity of the raw material mixing. The dispersion plate 1051 is a circular ring structure and an anti-overflow flange 15012 is set on the edge, so that the solution flows along the annular flow channel to each through hole 1051 1, evenly enter each material guide pipe 1052, improve the continuity of raw material addition, the stirring shaft 105 drives the first stirring blade 1053, the second stirring blade 1054 and the dispersion plate 1051 to rotate, stir and mix the materials in the reactor body 1, and improve the reaction rate of humic acid and organic acid complex. The scraper 10541 on the edge of the second stirring blade 1054 will scrape the materials at the bottom of the inner end surface of the reactor body 1 to prevent the materials from adhering to the bottom for a long time and affecting the heat dissipation of the reaction, and at the same time facilitate the emptying of the reactor body 1 when discharging. When the reaction is completed, stop the reduction motor 104, open the discharge port at the bottom of the reactor body 1, and discharge the reaction product. Due to the effect of the scraper 10541, the materials in the reactor body 1 can be emptied as much as possible.

[0056] Example 2

[0057] See also Figure 1-Figure 10 A reaction method for chelating trace elements in humic acid comprises the following steps:

[0058] Step 1, raw material preparation, open the humic acid feeding port 102 on the upper end surface of the reactor body 1, and slowly feed humic acid into the reactor body 1. Humic acid is a natural organic macromolecular compound, and its structure contains a variety of active functional groups, such as carboxyl, phenolic hydroxyl, etc. These functional groups play a key role in the subsequent chelation reaction and can form a stable complex with metal ions. Open the auxiliary material feeding port 2012 on the top of the drum 201, and feed raw materials such as metal salts and organic acids into the drum 201 of the pre-reaction mechanism 2 in sequence. The metal ions in the metal salts will react with the organic acid in the subsequent reaction to form an organic acid complex, and then undergo a chelation reaction with the humic acid. The organic acid has an acidic group and can undergo a coordination reaction with the metal ions to change the chemical activity of the metal ions, creating conditions for the subsequent chelation reaction;

[0059] Step 2, pre-reaction start, start the reduction motor 104, the output shaft of the reduction motor 104 drives the stirring shaft 105 to rotate, and at the same time, the first synchronous wheel 1041 on the side end face of the stirring shaft 105 drives the second synchronous wheel 2011 on the side end face of the drum 201 to rotate through the synchronous belt 1042, so that the drum 201 starts to rotate around the fixed axis 202, and a relative motion is generated between the drum 201 and the fixed axis 202. The first spiral blade 2013 in the drum 201 rotates with the rotation of the drum 201, and the belt The auxiliary materials such as metal salt and organic acid roll downward, and the outer end surface of the heating rod 2021 at the top center of the fixed axis 202 is provided with a second spiral blade 2022. Due to the relative movement of the fixed axis 202 with respect to the rotating drum 201, the second spiral blade 2022 drives the auxiliary materials in the center to roll upward, so that the materials form a stable circulation in the rotating drum 201. During the circulation process, the metal salt and the organic acid are fully mixed, and hot water is introduced into the heat medium chamber 2023 of the fixed axis 202 through the second water inlet 20231. After passing through the heat medium chamber 2023, the hot water is discharged from the second water outlet 20232 to heat the auxiliary materials inside the drum 201. The heat medium chamber 2023 is a circular cavity. The partition 20233 arranged inside divides it into two areas on the left and right. The second water inlet 20231 is on the right side of the partition 20233, and the second water outlet 20232 is on the left side of the partition 20233. After the hot water enters the heat medium chamber 2023, it needs to reach the top of the partition 20233 and pass through the partition 20233 to enter the left heat medium chamber 2023. The media chamber 2023 allows hot water to flow through the entire heating rod 2021, ensuring the stability and uniformity of the heating of the fixed axis 202. At a suitable temperature, the metal ions in the metal salt react with the organic acid. The oxygen atom in the acidic group (such as carboxyl -COOH) in the organic acid has a lone pair of electrons, which can form a coordination bond with the empty orbital of the metal ion, thereby generating an organic acid complex. This pre-reaction can preliminarily activate the metal ions and improve their reactivity in the subsequent main reaction.

[0060] Step 3, the main reaction is carried out. When the pre-reaction is completed, the solenoid valve 2024 on the feed pipe 2026 is opened, and the organic acid complex solution produced by the pre-reaction falls onto the dispersion plate 1051 through the feed pipe 2026. The dispersion plate 1051 is a circular ring structure, and the anti-overflow flange 15012 set on its edge forms an annular flow channel on the surface of the dispersion plate 1051. The organic acid complex solution can flow along the annular flow channel to each through hole 10511 and evenly enter each guide pipe 1052. There is an angle of five to ten degrees between the central axis of the guide pipe 1052 and the horizontal plane, which facilitates the solution to flow to the center of the stirring shaft 105. The solution is evenly sprinkled on the surface of the humic acid through the spray hole 10521 at the bottom of the guide pipe 1052 under the rotation of the stirring shaft 105. At this time, the stirring shaft 105 drives the first stirring blade 1053, the second stirring blade 1054 and the dispersion disk 1051 to rotate, stir and mix the materials in the reactor body 1, and the active functional groups (such as carboxyl and phenolic hydroxyl) in the humic acid react with the metal ions in the organic acid complex to form a chelate reaction. The principle of the chelate reaction is that the oxygen atoms and other coordinating atoms in the functional groups of the humic acid form multiple coordination bonds with the metal ions, wrapping the metal ions in its structure to form a stable chelate. The scraper 10541 on the edge of the second stirring blade 1054 will scrape the materials at the bottom of the inner end surface of the reactor body 1 to prevent the materials from adhering to the bottom for a long time and affecting the reaction and heat dissipation, while ensuring that the materials fully participate in the reaction, thereby improving the reaction rate and product quality.

[0061] Step 4, product collection. After the main reaction is completed, the discharge port 106 at the bottom of the reactor body 1 is opened. Due to the action of the scraper 10541 on the second stirring blade 1054, the material in the reactor body 1 can be emptied as much as possible, and the generated chelate is collected. The chelate combines the characteristics of humic acid and the nutritional elements of metal ions, which can improve soil fertility and promote the absorption of trace elements by plants.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reaction device for chelating trace elements in humic acid, comprising a reaction kettle body (1), characterized in that: The upper end of the reactor body (1) is provided with a pre-reaction mechanism (2) which is in communication therewith; The outer end surface of the reactor body (1) is provided with a heat-insulating jacket (101), the side end surface of the heat-insulating jacket (101) is provided with a first water inlet (1011) and a first water outlet (1012) which are in communication therewith, the upper end surface of the reactor body (1) is provided with a humic acid feeding port (102), an inspection hole (103) and a reduction motor (104), and a rotatably connected stirring shaft (105) is provided inside the reactor body (1), and the stirring shaft (105) is mounted on the output shaft of the reduction motor (104); The pre-reaction mechanism (2) comprises a rotating drum (201) and a fixed shaft (202); the fixed shaft (202) is fixedly mounted on the upper end surface of the reactor body (1); the rotating drum (201) is sleeved on the fixed shaft (202) and is rotatably connected thereto; a feed pipe (2026) penetrating the reactor body (1) is provided at the bottom of the fixed shaft (202); a through hole (2025) penetrating the feed pipe (2026) is provided on the side end surface of the fixed shaft (202); and a solenoid valve (2024) is provided on the feed pipe (2026).

2. The reaction device for chelating trace elements in humic acid according to claim 1, characterized in that: The side end surface of the stirring shaft (105) is provided with a first synchronous wheel (1041), the side end surface of the rotating drum (201) is provided with a second synchronous wheel (2011) matched with the first synchronous wheel (1041), the outer end surfaces of the first synchronous wheel (1041) and the second synchronous wheel (2011) are sleeved with a synchronous belt (1042) for transmission, and the reduction motor (104) drives the rotating drum (201) through the first synchronous wheel (1041), the second synchronous wheel (2011) and the synchronous belt (1042).

3. The reaction device for chelating trace elements in humic acid according to claim 1, characterized in that: A support frame (203) for supporting the rotating drum (201) is arranged at the top of the side end surface of the reactor body (1), and a sleeve ring (2031) rotatably connected to the rotating drum (201) is arranged at the side end surface of the support frame (203).

4. The reaction device for chelating trace elements in humic acid according to claim 1, characterized in that: The top of the rotating drum (201) is provided with an auxiliary material feeding port (2012), the inner end surface of the rotating drum (201) is provided with a first spiral blade (2013), the top center of the fixed shaft (202) is provided with a heating rod (2021), the outer end surface of the heating rod (2021) is provided with a second spiral blade (2022), and the spiral directions of the first spiral blade (2013) and the second spiral blade (2022) are opposite.

5. The reaction device for chelating trace elements in humic acid according to claim 1, characterized in that: The inner wall of the fixed shaft (202) is provided with a heat medium chamber (2023), and the left and right sides of the fixed shaft (202) are respectively provided with a second water inlet (20231) and a second water outlet (20232) which are connected to the heat medium chamber (2023).

6. The reaction device for chelating trace elements in humic acid as claimed in claim 5, characterized in that: The heat medium chamber (2023) is a circular ring-shaped cavity, a partition (20233) is arranged in the annular flow channel, and a water-permeable hole (20234) is left between the top of the partition (20233) and the inner end surface of the heating rod (2021).

7. The reaction device for chelating trace elements in humic acid according to claim 1, characterized in that: The side end surface of the stirring shaft (105) is provided with a dispersion disk (1051), a first stirring blade (1053) and a second stirring blade (1054), and the edge of the second stirring blade (1054) is provided with a scraper (10541) that fits against the inner wall of the reactor.

8. The reaction device for chelating trace elements in humic acid as claimed in claim 7, characterized in that: A material guide pipe (1052) is evenly arranged between the dispersion disk (1051) and the stirring shaft (105); a through hole (10511) penetrating the material guide pipe (1052) is arranged at the bottom of the dispersion disk (1051); a spray hole (10521) is arranged at the bottom of the material guide pipe (1052); and the feed discharge pipe (2026) is located above the dispersion disk (1051).

9. The reaction device for chelating trace elements with humic acid as claimed in claim 8, characterized in that: The dispersion plate (1051) is a circular ring structure, and an anti-overflow flange (15012) is provided on the edge of the dispersion plate (1051). The central axis of the material guide tube (1052) has an angle of five to ten degrees with the horizontal plane.

10. A reaction method for trace elements in humic acid chelation, applicable to the reaction device for trace elements in humic acid chelation as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, raw material preparation, humic acid is fed into the reactor body (1) through the humic acid feeding port (102), and raw materials such as metal salts and organic acids are fed into the rotating drum (201) of the pre-reaction mechanism (2) through the auxiliary material feeding port (2012); Step 2: Pre-reaction start-up: raw materials such as metal salt and organic acid are pre-reacted in the drum (201) to produce an organic acid complex; Step 3: The main reaction is carried out by adding the organic acid complex into the reactor body (1) to react with humic acid to produce the final desired chelate; Step 4, product collection: after the main reaction is completed, the desired chelate is collected through the discharge port (106), and after the equipment is stopped, the reactor body (1) and the pre-reaction mechanism (2) are cleaned.

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