Humic acid activation device for improving organic matter in cultivated land

Abstract

The present application relates to a kind of mineral source humic acid activation device for improving cultivated organic matter, the helical shaft in the device is suspended in inner cylinder, and ceramic ball is placed in the inner cylinder;Helical drive raw materials and ceramic ball collide in circulation and eddy current and activate;Humic acid functional group chemical bond breaks, reorganizes, forms high-activity organic matter with greater surface tension and viscosity by combining with water molecules.Slurry passes through coagulator and enters classifier for particle size classification;Fine particles enter the separation cylinder with eddy current blade upwards, and large particles enter the liquid collecting tank downwards.Organic matter and inorganic ash in fine particles are separated in the separation cylinder, and organic matter enters coagulator through reflux pipe and is aggregated into large micelles again to enter classifier for classification again.The present application uses wet mechanical activation instead of mechanical dry method to avoid the damage of high temperature to humic acid functional group during processing;At the same time, organic matter and inorganic matter are separated by repeated collision and friction, and humic acid is concentrated after classification, which can be directly used for cultivated drip irrigation.

Description

Technical Field

[0001] This invention relates to the field of mechanical wet activation technology of mineral humic acid, specifically to a mineral humic acid activation device for improving the organic matter content of arable land. Background Technology

[0002] The cycling of carbon and organic nutrients in arable soil is a key ecological function in farmland ecosystems. Excessive application of chemical fertilizers can lead to many problems, such as soil compaction, acidification, and microbial imbalance. Furthermore, long-term use of chemical fertilizers can degrade the quality and nutritional content of agricultural products. Large-scale application of humic acid can effectively replenish arable soil organic matter while also enhancing soil moisture retention and aggregate stability.

[0003] Mineral humic acid is widely found in weathered coal, lignite, and peat. Industrial processing allows for the large-scale production of humic acid. However, unpurified and unactivated mineral humic acid contains a significant amount of soil and inorganic impurities. The challenges lie in effectively separating humic acid from inorganic substances during industrial production, further activating the functional groups of humic acid, and concentrating and enriching the activated humic acid.

[0004] Humic acid in raw materials is often tightly bound to inorganic particles, forming embedded or encapsulated structures. To separate and activate it, the material needs further refinement to increase its surface area. However, directly drip-feeding an aqueous solution presents challenges such as slow water flow and inorganic ash precipitation clogging pipes and nozzles. Both of these application conditions necessitate refining the raw material to a mesh size of 600 or finer when using mechanical processing. Traditional dry grinding methods generate high temperatures during continuous grinding, and prolonged exposure to temperatures exceeding 60°C can damage the active functional groups of humic acid. While intermittent dry grinding allows for temperature control, it significantly reduces production efficiency, and dry production is not conducive to further separation of humic acid and inorganic substances. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a mineral humic acid activation device for enhancing the organic matter content of arable land. This device avoids the destruction of functional groups by high temperatures during the humic acid activation process, while separating organic matter from inorganic impurities. The organic matter is then agglomerated and concentrated, and used directly as an aqueous solution for drip irrigation to supplement the organic nutrients in arable land.

[0006] The objective of this invention is achieved through the following scheme. According to this invention, a mineral humic acid activation device for improving the organic matter content of arable land includes an activation cylinder, a separation cylinder, a pressure pump, a coagulant, a hydraulic classifier, and a collection tank. A spiral shaft is vertically suspended inside the activation cylinder, and a main transmission device for driving the spiral shaft to rotate is located at the top of the activation cylinder. An inner cylinder is provided between the activation cylinder and the spiral shaft, and a feed trough is located at the top of the activation cylinder for adding mineral humic acid raw materials, water, and ball bearings for refining the mineral humic acid raw materials to the inner cylinder. The inner cylinder is constructed of a perforated steel plate, and the minimum particle size of the ball bearings inside is larger than the diameter of the holes in the steel plate. The activation cylinder is connected to the pressure pump through an overflow hole on its side wall, and the pressure pump, through the coagulant… The device is connected to a hydraulic classifier; the lower end of the hydraulic classifier sends the heavier components into the collection tank, and the upper end sends the lighter components into the separation cylinder; one end of the separation cylinder is equipped with vortex blades inside, and a power device is provided outside to drive the vortex blades to rotate; the other end is connected to the feed trough through a central pipe, and the return pipe on the side wall of the other end of the separation cylinder is connected to a coagulator; the coagulator is equipped with a nozzle, and the slurry delivered by the pressure pump is sprayed through the nozzle and enters the hydraulic classifier tangentially, so that a low-pressure vortex zone is formed at the nozzle outlet. The low-pressure vortex zone draws in small-diameter organic matter from the wall of the separation cylinder through the return pipe; a submersible pump is provided at the bottom of the collection tank, and a finished product outlet pipe is provided on the upper side wall.

[0007] Furthermore, the ball is a ceramic ball. Using ceramic balls as the material to refine the mineral humic acid raw material not only meets the refinement requirements, but also the wear of the ceramic balls does not introduce metal impurities and does not affect the quality of the final product.

[0008] Furthermore, the spiral shaft is located at the center of the activation cylinder, and the inner cylinder and the activation cylinder are coaxially arranged.

[0009] Furthermore, the main drive unit is fixed to the top of the activation cylinder by a support frame, which is detachably connected to the activation cylinder to facilitate the maintenance of the drive shaft and the main drive unit.

[0010] Furthermore, vortex plates are provided at different heights on the inner wall of the activation cylinder to form vortices between the activation cylinder and the inner cylinder, thereby further enhancing the refining efficiency.

[0011] Furthermore, the hydraulic classifier has two cavities, an upper and a lower. The upper cavity is cylindrical and the lower cavity is inverted conical. The upper part of the hydraulic classifier is connected to the separation cylinder through a connecting pipe inserted into its cavity, and the feed pipe of the hydraulic classifier is tangentially connected to the upper cavity.

[0012] Furthermore, double-headed helical blades are welded onto the helical shaft, and the blade surfaces are covered with wear-resistant rubber.

[0013] Furthermore, the lower wall of the activation cylinder is provided with a vent pipe and a manhole, and the inner cylinder is also provided with a manhole at the position corresponding to the manhole on the activation cylinder, so as to facilitate maintenance and cleaning.

[0014] Furthermore, regulating valves are installed on the pipelines before and after the booster pump, and pressure gauges are installed on the connecting pipelines of the condenser and the hydraulic classifier to facilitate the regulation of flow and pressure and the maintenance of the booster pump.

[0015] Furthermore, the lower part of the collection tank is provided with a collection tank vent pipe and a collection tank manhole door, and a liquid level gauge is also provided inside the collection tank.

[0016] Compared with existing technologies, the advantages of this invention are as follows: When mineral-derived humic acid raw materials and water are added to an activation cylinder, the raw material particle size is refined under the grinding action of spiral blades and ceramic balls of different particle sizes. This fully activates various hydrophilic functional groups such as hydroxyl and alcohol groups in the organic matter, enhancing interfacial activity. The heat generated during the grinding and refining process of the mineral raw materials is carried away by the slurry, preventing damage to the organic functional groups. The overflow generated by the activation cylinder passes through a hydraulic classifier, a separation cylinder, and a coagulant, maximizing the separation of mineralized inorganic impurities and colloidal organic matter. This results in a higher concentration of organic matter in the deeply processed mineral-derived humic acid solution, which can then be directly used for drip irrigation of crops in arable land.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the composition of a mineral-based humic acid activation device for improving the organic matter content of arable land according to the present invention.

[0019] [Attached image labels]

[0020] 1. Spiral shaft; 2. Activation cylinder; 3. Vortex plate; 4. Inner cylinder; 5. Support frame; 6. Main drive device; 7. Feed trough; 8. Central pipe; 9. Return pipe; 10. Separation cylinder; 11. Vortex blades; 12. Drive device; 13. Pressure gauge; 14. Regulating valve; 15. Booster pump; 16. Coagulant; 17. Hydraulic classifier; 18. Collection tank; 19. Finished product outlet pipe; 20. Submersible pump; 21. Level gauge; 22. Collection tank vent pipe; 23. Collection tank manhole; 24. Activation cylinder manhole; 25. Activation cylinder vent pipe. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0022] like Figure 1 The illustration shows an embodiment of a mineral humic acid activation device for improving the organic matter content of arable land according to the present invention. The activation device includes an activation cylinder 2, a separation cylinder 10, a pressure pump 15, a coagulant 16, a hydraulic classifier 17, and a collection tank 18. An inner cylinder 4 is fixedly installed inside the activation cylinder 2, with its bottom fixed to the bottom of the activation cylinder 2 and its top lower than the activation cylinder 2. A feed trough 7 is provided at the top of the activation cylinder, with its outlet facing the inner cylinder 4, facilitating the addition of mineral humic acid raw materials, water, and ball bearings for refining the mineral humic acid raw materials into the inner cylinder 4. The inner cylinder 4 is constructed of a perforated steel plate, and the diameter of the holes in the steel plate is smaller than the diameter of the smallest ball bearing to prevent the ball bearings from detaching from the inner cylinder 4. In this embodiment, the ball bearings are ceramic balls.

[0023] A spiral shaft 1 is vertically suspended inside the activation cylinder 2. An inner cylinder 4 is located between the activation cylinder 2 and the spiral shaft 1. When the spiral shaft 1 and spiral blades rotate under the drive of the main drive device 6, they can cause the material in the inner cylinder 4 to spiral upwards. In this embodiment, the spiral shaft 1 is located at the center of the activation cylinder 2, and the inner cylinder 4 is coaxially arranged with the activation cylinder 2. The main drive device 6 is fixed to the top of the activation cylinder 2. In this embodiment, the main drive device 6 is mounted on a support frame 5, which is fixed to the top of the activation cylinder 2. Preferably, the support frame 5 is a steel load-bearing frame, but it is not limited to this.

[0024] An overflow hole is provided on the upper side wall of the activation cylinder 2, and the overflow hole is connected to the pressure pump 15 via a pipe. The height of the overflow hole is lower than the height of the inner cylinder 4. The pressure pump 15 is connected to the coagulant 16 and the hydraulic classifier 17. The coagulant 16 is provided with a nozzle for fluid acceleration. The slurry delivered by the pressure pump 15 is accelerated by spraying through the nozzle and then enters the hydraulic classifier 17 tangentially. Preferably, the nozzle in the coagulant 16 is a conical nozzle, with its inlet side connected to the pressure pump 15 and its outlet side connected to the hydraulic classifier 17.

[0025] The hydraulic classifier 17 has a cavity that is larger at the top and smaller at the bottom, and it is connected to the coagulant 16 through an inlet on its upper wall. The lower outlet of the hydraulic classifier 17 is connected to a collection tank 18, and the upper part is connected to a separation cylinder 10 via a connecting pipe, the lower end of which is inserted a certain distance into the center of the cavity of the hydraulic classifier 17. Inside the hydraulic classifier 17, relatively heavy inorganic particles and large humic acid flocs experience greater centrifugal force and enter the collection tank 18 along the inner wall of the hydraulic classifier 17; relatively light inorganic ash and small-diameter organic matter enter the separation cylinder 10 upwards through the connecting pipe in the center of the hydraulic classifier 17. Preferably, the hydraulic classifier 17 has a cylindrical cavity at the upper end and an inverted conical cavity at the lower end, with the inlet located tangentially to the cylindrical cavity, so that the discharge pipe of the coagulant 16 is tangentially connected to the hydraulic classifier 17.

[0026] The separator 10 has a vortex blade 11 inside one end, which is connected to a drive device 12 via a drive shaft. The drive device 12 is fixed outside the separator 10. The other end of the separator 10 is connected to the feed trough 7 via a central pipe 8. The side wall of the separator 10 connected to the central pipe 8 is connected to a coagulant 16 via a return pipe 9, and the side wall near the vortex blade 11 is connected to a hydraulic classifier 17 via a connecting pipe. The drive device 12 drives the vortex blade 11 to accelerate the light material entering the separator 10 from the hydraulic classifier 17, causing it to rotate rapidly to the other end. Organic matter and inorganic ash are separated during the rotation process according to the different centrifugal forces they experience. Inorganic ash impurities are distributed in the central area of ​​the separator 10, while small organic particles are distributed on the wall of the separator 10. The high-speed water flow at the inner nozzle of the coagulant 16 causes a decrease in surrounding pressure, thus forming a low-pressure vortex. This vortex, in turn, generates suction on the return pipe 9, causing organic matter on the wall of the separation cylinder 10 to enter the low-pressure vortex zone of the coagulant 16 through the return pipe 9. There, it agglomerates and forms larger flocs that enter the hydraulic classifier 17 for circulation and separation. The ash and most of the water flow through the central pipe 8 into the feed trough 7, where it is used as makeup water for the raw material slurry mixing.

[0027] The collection tank 18 is equipped with a submersible pump 20 at its bottom, with the outlet of the submersible pump 20 extending from the lower side wall of the collection tank 18. The upper side wall of the collection tank 18 is equipped with a finished product outlet pipe 19. Organic matter and large inorganic particles entering the collection tank 18 through the lower outlet of the hydraulic classifier 17 naturally settle and stratify according to their different specific gravities. The large inorganic particles at the bottom are discharged by the submersible pump 20 at the bottom, while the high-concentration, low-density humic acid activated aqueous solution is discharged from the finished product outlet pipe 19.

[0028] In this embodiment, double-headed helical blades are welded onto the helical shaft 1, and the surface of the blades is covered with wear-resistant rubber to enhance the service life of the blades. The wear-resistant rubber is 5mm thick.

[0029] In this embodiment, vortex plates 3 are provided at different heights on the inner wall of the activation cylinder 2. During operation, a strong vortex will be formed near the vortex plates 3, and the raw material particles will be further activated by mutual collision at the strong energy vortex.

[0030] The lower part of the activation cylinder 2 is equipped with an activation cylinder vent pipe 25 and two activation cylinder manholes 24 of the same specifications. One activation cylinder manhole is located on the side wall of the activation cylinder 2, and the other is located on the side wall of the inner cylinder 4 at a position corresponding to the activation cylinder manhole on the side wall of the activation cylinder. The vent pipe 25 is used to drain slurry during maintenance. The activation cylinder manhole 24 is used to clean the mineral deposits and ceramic balls at the bottom of the activation cylinder 2 and the inner cylinder 4 during maintenance.

[0031] In this embodiment, the support frame 5 is connected to the top connecting plate of the activation cylinder 2 using bolts and locating pins. When the spiral shaft 1 is replaced, the support frame 5 and the main drive device 6 are removed as a whole. In other embodiments, the support frame 5 can also be detachably connected to the top connecting plate of the activation cylinder 2 in other ways.

[0032] In this embodiment, regulating valves 14 are respectively installed on the pipelines before and after the pressure pump 15 to regulate the slurry pressure and flow rate, and to facilitate the maintenance of the pressure pump 15.

[0033] In this embodiment, a pressure gauge 13 is installed on the pipe connecting the coagulant 16 and the hydraulic classifier 17 to indicate the pressure of the slurry at the inlet of the hydraulic classifier.

[0034] In this embodiment, the drive device 12 is equipped with an adjustable speed motor, which can adjust the rotation speed to make the particles in the slurry in the separation cylinder 10 obtain different centrifugal forces.

[0035] In this embodiment, the outlet pipe at the lower end of the feed trough 7 extends directly into the inner cylinder 4, so that the raw materials, water and dilute solution added by the feed trough 7 are mixed and directly enter the inner cylinder 4.

[0036] In this embodiment, the lower part of the collection tank 18 is provided with a collection tank vent pipe 22 and a collection tank manhole door 23, which are used for discharging slurry and cleaning the collection tank during maintenance, respectively. The collection tank 18 is also provided with a level gauge 21 to indicate the slurry level.

[0037] The specific operation process of the mineral-based humic acid activation device for enhancing the organic matter content of arable land according to the present invention is as follows:

[0038] 1) Prepare a predetermined quantity of ceramic balls and a fixed amount of water that meet the gradation requirements according to the designed output, and ensure that the minimum particle size of the gradation ceramic balls is greater than the aperture of the steel plate of the inner cylinder 4. Then add the ceramic balls and water into the inner cylinder 4 through the feed trough 7.

[0039] 2) Start the main drive device 6. After the screw shaft stabilizes, add mineral humic acid raw material to the inner cylinder 4 through the feed trough 7. Under the stirring of the screw shaft 1, the mineral humic acid raw material and water mix to form a homogeneous slurry. The raw material particles and ceramic balls in the slurry are refined under the action of collision and abrasion. At the same time, the lifting of the double-headed screw blades causes the slurry to form a spiral up-and-down composite circulation between the inner wall of the activation cylinder 2 and the inner cylinder 4. The circulation is blocked by the vortex plate 3, forming a vortex around it. Inside the vortex, the materials continue to collide and refine, and organic matter and inorganic minerals are further separated. The high-energy vortex causes the chemical bonds of the humic acid functional groups to break and recombine, and through combination with water molecules, form highly active organic matter with greater surface tension and viscosity.

[0040] 3) The refined and activated slurry enters the pressurization pump 15 through the overflow port 2. After being pressurized by the pressurization pump 15, it enters the coagulant 16 and is ejected through the nozzles inside the coagulant 16, forming a high-speed fluid that enters the hydraulic classifier 17 tangentially for the first separation. The relatively heavy inorganic large particles and humic acid flocs are subjected to large centrifugal forces and enter the collection tank 18 along the inner wall of the hydraulic classifier 17. The solid concentration in the slurry in the collection tank 18 can reach more than 60%. The relatively light inorganic ash and small-diameter organic matter enter the separation cylinder 10 upward through the tube in the center of the hydraulic classifier 17.

[0041] 4) Light materials entering the separation cylinder 10 are accelerated by the vortex blades 11, and organic matter and inorganic ash are separated again by the difference in centrifugal force. Organic matter is drawn into the low-pressure vortex area around the nozzle in the coagulant 16 through the return pipe 9, where it agglomerates and forms larger clumps that enter the hydraulic classifier 17 for circulation and sorting. Ash and most of the water flow into the feed tank 7 through the central pipe 8 and are used as supplementary water for raw material slurry mixing.

[0042] 5) Organic matter and large inorganic particles in the collection tank 18 naturally settle and stratify according to their different specific gravities. The large inorganic particles at the bottom are discharged by the submersible pump 20 at the bottom. The high-concentration, low-density humic acid activated aqueous solution is discharged from the finished product outlet pipe 19.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this description pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A device for activating mineral humic acid to enhance organic matter in cultivated land, characterized by, The application relates to a device for producing humic acid, which comprises an activation cylinder, a separation cylinder, a pressurizing pump, a coagulator, a hydrocyclone and a liquid collecting tank, wherein a spiral shaft is vertically hung in the activation cylinder, a main transmission device for driving the spiral shaft to rotate is arranged at the top of the activation cylinder, an inner cylinder is arranged between the activation cylinder and the spiral shaft, a feeding slot for adding mineral humic acid raw materials, water and balls for realizing the refinement of the mineral humic acid raw materials into the inner cylinder is arranged at the top of the activation cylinder, the inner cylinder is composed of a net structure, and the minimum particle diameter of the balls in the inner cylinder is greater than the diameter of the net holes; the activation cylinder is connected with the pressurizing pump through overflow holes on the sidewall of the activation cylinder, the pressurizing pump is connected with the hydrocyclone through the coagulator, the hydrocyclone is connected with the liquid collecting tank through the separation cylinder, the lower end of the hydrocyclone sends the large specific gravity components into the liquid collecting tank, and the upper end of the hydrocyclone sends the components with relatively small specific gravity into the separation cylinder; a vortex blade is arranged in one end of the separation cylinder, a power device for driving the vortex blade to rotate is arranged outside the vortex blade, the other end of the separation cylinder is connected with the feeding slot through a central pipe, and a backflow pipe on the sidewall of the other end of the separation cylinder is connected with the coagulator; a nozzle is arranged in the coagulator, the slurry delivered by the pressurizing pump is sprayed through the nozzle and then enters the hydrocyclone tangentially, so that a low-pressure vortex area is formed at the outlet of the nozzle, and the low-pressure vortex area sucks the small-diameter organic matters at the cylinder wall of the separation cylinder through the backflow pipe; and a submersible pump is arranged at the bottom of the liquid collecting tank, and a finished product liquid outlet pipe is arranged on the upper sidewall of the liquid collecting tank.

2. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1, characterized in that, The balls are ceramic balls.

3. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1 or 2, characterized in that, The spiral shaft is arranged at the center of the activation cylinder, and the inner cylinder and the activation cylinder are coaxially arranged.

4. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1 or 2, characterized in that, The main transmission device is fixed on the top of the activation cylinder through a supporting frame, and the supporting frame is detachably connected with the activation cylinder.

5. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1 or 2, characterized in that, Vortex plates are arranged on the inner walls of the activation cylinder at different heights.

6. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1 or 2, characterized in that, The hydrocyclone has two cavities, the upper cavity is cylindrical, and the lower cavity is inverted conical, the upper part of the hydrocyclone is connected with the separation cylinder through a connecting pipe inserted into the cavity, and a feeding pipe of the hydrocyclone is tangentially connected with the upper cavity.

7. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1 or 2, characterized in that, Double-head spiral blades are welded on the spiral shaft, and wear-resistant rubber is covered on the surfaces of the blades.

8. The device for activating mineral humic acid for lifting up cultivated organic matter according to claim 1 or 2, characterized by, An air release pipe and a manhole door are arranged on the lower wall of the activation cylinder respectively, and a manhole door is arranged on the inner cylinder at a position corresponding to the manhole door of the activation cylinder.

9. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1, characterized in that, Adjusting valves are arranged on the pipelines before and after the pressurizing pump, and a pressure gauge is arranged on the connecting pipeline of the coagulator and the hydrocyclone.

10. The device for activating mineral humic acid for raising cultivated organic matter according to claim 1, characterized in that, A liquid collecting tank air release pipe and a liquid collecting tank manhole door are arranged at the lower part of the liquid collecting tank, and a liquid level meter is further arranged in the liquid collecting tank.

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