Method for making green planting soil by using river and lake nitrogen and phosphorus contaminated sediment

Abstract

This invention discloses a method for producing planting soil for landscaping using nitrogen- and phosphorus-polluted river and lake sediment. The method includes the following steps: collecting nitrogen- and phosphorus-polluted river and lake sediment; filtering the sediment through a separation unit to obtain a first mixed soil; allowing the first mixed soil to stand for one hour; adding auxiliary materials to the first mixed soil; and then subjecting it to intensive mixing through a mixing unit to obtain a second mixed soil; sending the second mixed soil to a ventilation chamber and adding a microbial compound inoculant to promote rapid decomposition, thus obtaining planting soil suitable for landscaping. This invention has the following advantages and effects: it designs a complete and standardized processing chain to improve nitrogen- and phosphorus-polluted river and lake sediment, producing planting soil for landscaping, turning waste into treasure, and realizing the resource reuse of sediment.

Description

Technical Field

[0001] This invention relates to the field of ecological environment, and in particular to a method for making greening planting soil using nitrogen and phosphorus polluted sediment from rivers and lakes. Background Technology

[0002] Every year, my country generates hundreds of millions of cubic meters of waste silt from river and lake water environment remediation, waterway dredging, and port construction projects. Due to the high water content, low strength, poor permeability, complex composition, and slow consolidation process of river and lake silt, it cannot be directly used for engineering or planting. After dredging, it is often simply piled up on open ground, occupying land resources for extended periods. Furthermore, the long-term accumulation of silt at the bottom of rivers and lakes causes water pollution and foul odors. In addition, land resources are becoming increasingly scarce in my country's urbanization process. Currently, there is a lack of complete and standardized treatment chains for nitrogen and phosphorus polluted river and lake sediments. If these sediments could be improved and made into planting soil, the problems caused by the sediments could be effectively solved, turning waste into treasure and achieving resource reuse. Summary of the Invention

[0003] The purpose of this invention is to provide a method for producing greening planting soil using nitrogen and phosphorus polluted sediment from rivers and lakes, in order to solve the problems mentioned in the background art.

[0004] The above-mentioned technical objective of this invention is achieved through the following technical solution: a method for preparing greening planting soil using nitrogen and phosphorus polluted sediment from rivers and lakes, comprising the following steps:

[0005] Step S1: Collect nitrogen and phosphorus polluted sediment from rivers and lakes, and filter the mud and water in the sediment through a separation unit to obtain the first mixed soil.

[0006] Step S2: After the first mixed soil has been left to stand for 1 hour, auxiliary materials are added to the first mixed soil, and then the second mixed soil is obtained after being stirred by the mixing unit.

[0007] Step S3: Send the second mixed soil to the ventilation room and add microbial compound inoculant to promote the rapid decomposition of the second mixed soil, thus obtaining planting soil that can be used as landscaping soil.

[0008] A further setting is that the auxiliary materials in step S2 include straw powder, chicken manure, and superphosphate; wherein,

[0009] For every 1000 kg of the first mixed soil, 510 kg of straw powder, 500 kg of chicken manure, and 50 kg of superphosphate should be added.

[0010] A further provision is that the microbial compound agent comprises Bacillus subtilis, sulfur bacteria, and Bacillus licheniformis in a mass ratio of 1:0.1-0.5:0.1-0.2; the amount of this microbial compound agent added is 2-3% of the amount of the second mixed soil.

[0011] A further configuration is as follows: the separation unit in step S1 includes a frame as a load-bearing structure, a support platform extending longitudinally upward is fixedly installed at the lower end of the frame, and a lower end seat is fixedly installed at the lower end of the frame, the lower end seat being located in front of the support platform and blocking the lower half of the support platform; a separation component that can filter out mud and water in the bottom sediment is installed at the upper end of the support platform, the separation component including a lower end connecting seat fixedly installed on the support platform, a cylindrical filter barrel fixedly installed at the upper end of the lower end connecting seat, the filter barrel having an opening at the upper end, an upper end frame fixedly installed on the support platform, and an upper end fixing seat fixedly installed on the upper end frame, a stroke rod that can move longitudinally is installed inside the upper end fixing seat, a drive cylinder connected to the stroke rod and providing driving force for the longitudinal movement of the stroke rod is fixedly installed at the upper end of the upper end frame, the lower end of the stroke rod extending out of the upper end fixing seat, and a pressure plate fixedly installed at its lower end, the cross-sectional width of the pressure plate being adapted to the inner diameter of the filter barrel.

[0012] Several filter holes are provided on the outer peripheral wall of the lower half of the filter barrel. The pressure plate can press the bottom mud placed in the filter barrel under the action of the stroke rod, and squeeze the mud and water in the bottom mud out of the filter holes to achieve the purpose of filtering mud and water.

[0013] A further feature is that the lower connecting seat is separated from the filter barrel, and the lower connecting seat has a connecting channel inside; the lower end of the lower connecting seat extends vertically downward and is mounted on the pushing unit; a small control valve is fixedly mounted at the bottom side of the filter barrel, one end of the small control valve is connected to the inside of the filter barrel, and the other end is connected to the connecting channel inside the lower connecting seat through an extension pipe.

[0014] The pushing unit includes a drive seat fixed on the lower end seat, and an inclined upward transmission cylinder is fixedly installed on the drive seat. The lower end connecting seat is connected to the transmission cylinder. A spiral blade is installed inside the transmission cylinder. A drive motor is fixedly installed on the drive seat, connected to the spiral blade and driving the spiral blade to rotate. Through the rotation of the spiral blade, the bottom mud that has been filtered and drained from the mud and water falling into the transmission cylinder is transferred to the end of the transmission cylinder.

[0015] A further configuration is as follows: the stirring unit in step S2 includes a stirring seat located to the right of the transmission cylinder; a stirring tank is fixedly mounted on the stirring seat; the end of the transmission cylinder is connected to the interior of the stirring tank via a transmission pipe; vertical cylinders are fixedly mounted on both sides of the stirring seat; an upper end plate is fixedly mounted on the upper end of the two vertical cylinders; a stepper motor is fixedly mounted on the upper end plate; a drive shaft is fixedly mounted on the lower end of the stepper motor; a stirring component is fixedly mounted on the lower end of the drive shaft; a push plate is fixedly mounted in the middle section of the drive shaft; the push plate can move down into the stirring tank and adhere to the inner wall of the stirring tank.

[0016] A further configuration is as follows: the upper end of the push plate has an inner hole for the drive shaft to pass through, and six through holes are regularly formed on the upper end of the push plate. An injection block is fixedly installed in each of the through holes. The lower end of the injection block is flush with the lower end of the push plate and tightly fitted with the corresponding through hole. The upper end of the injection block has an injection hole for injecting auxiliary materials. The inside of the injection block has a longitudinal guide channel. An outwardly protruding section is fixedly installed at the right end of the lower half of the guide channel, and a sealing groove is formed in the outwardly protruding section. The lower end of the injection block has a lower end groove, and a housing is installed in the lower end groove. The left end of the housing has a recessed section. The injection block is provided with an extension arm that can extend into the recessed section, and a first bolt that can be screwed into the housing is provided on the extension arm.

[0017] The housing has a transverse inner cavity, and a sealing block is slidably disposed in the inner cavity. The sealing block is located to the left of the sealing groove. The sealing block is hollow inside, and an inner spring is compressed between the sealing block and the left end wall of the inner cavity. The elastic force of the inner spring pushes the sealing block into the sealing groove to cut off the flow channel. A baffle is disposed on the right side of the housing. The baffle is fixed to the injection block by a second bolt. The baffle has a through hole corresponding to the position of the inner cavity, and a first protrusion is disposed on the inner wall of the through hole. A second protrusion is disposed on the outer wall of the sealing block. The abutment of the first and second protrusions prevents the sealing block from completely falling out of the inner cavity.

[0018] An auxiliary cavity is provided between the second protrusion at the lower end of the sealing block and the baffle. The auxiliary cavity still exists when the first protrusion and the second protrusion abut against each other. A first air guide channel communicating with the auxiliary cavity is provided in the housing. A second air guide channel communicating with the first air guide channel is provided in the injection block. The second air guide channel extends to the upper end face of the injection block.

[0019] A further feature is that the convex section has an inclined surface, the sealing block has an inclined section and a sealing ring is provided on the inclined section; the left side of the flow channel is provided with an inclined first guide surface, and the upper end of the baffle is provided with a second guide surface that connects with the first guide surface, and the two form a smooth surface.

[0020] A further configuration is as follows: the stirring component includes two transverse support rods fixedly mounted on the drive shaft, with a gap between the two transverse support rods. The left ends of the two transverse support rods are connected by a first longitudinal support rod, and the right ends are connected by a second longitudinal support rod. The first longitudinal support rod and the second longitudinal support rod are respectively provided with a first spacer cavity and a second spacer cavity. A plurality of inclined first stirring blades are regularly arranged in the first spacer cavity, and a plurality of inclined second stirring blades are regularly arranged in the second spacer cavity. The inclination directions of each of the first stirring blades and each of the second stirring blades are opposite.

[0021] An inclined first agitator is provided between the drive shaft and the first longitudinal support rod, and an inclined second agitator is provided between the drive shaft and the second longitudinal support rod. The first agitator and the second agitator are parallel to each other.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. This invention designs a complete and standardized processing chain to improve nitrogen and phosphorus polluted sediment in rivers and lakes, turn it into green planting soil, turn waste into treasure, and realize the resource reuse of sediment.

[0024] 2. In this invention, the stroke rod in the separation unit can move longitudinally back and forth under the drive of the drive cylinder. The pressure plate at the lower end of the drive cylinder can press on the bottom mud placed in the filter barrel and squeeze the mud and water in the bottom mud out of the filter hole to achieve the purpose of filtering mud and water. The cross-sectional width of the pressure plate is adapted to the diameter inside the filter barrel, thereby effectively preventing the bottom mud from overflowing to the upper end of the pressure plate.

[0025] 3. In this invention, a connecting channel is provided in the lower connecting seat, and the filter barrel and the pushing unit are connected through a small control valve and an extension pipe; the spiral blades in the pushing unit, driven by the drive motor, transfer the bottom mud in the transmission barrel that has been filtered to remove mud and water to the end of the transmission barrel.

[0026] 4. In this invention, the mixing tank in the mixing unit is connected to the bottom mud of the filtered mud-water sent out from the end of the transmission cylinder through a transmission pipe; the vertical cylinder is used to push the upper end plate to adjust its position longitudinally; the stepper motor on the upper end plate can drive the mixing component to stir the bottom mud of the filtered mud-water located in the mixing tank through the drive shaft; the push plate can move down into the mixing tank and stick to the inner wall of the mixing tank, thereby effectively preventing the bottom mud from being thrown out of the mixing tank during the mixing process.

[0027] 5. In this invention, six injection blocks are provided on the push plate, which can inject six different auxiliary materials respectively. Only three injection blocks are used in this invention. The injection blocks allow for simultaneous connection to six different pipelines to inject different auxiliary materials. Compared to the prior art which uses only one injection port and injects different auxiliary materials by changing the pipeline connected to the injection port, this eliminates the need to change pipelines, making it more convenient in actual use. A longitudinal flow channel is provided within the injection block. This flow channel can be cut off by the cooperation of the sealing block and the sealing groove. In the initial state, the sealing block is held embedded in the sealing groove by the elastic force of the inner spring, and the flow channel is cut off. When it is necessary to open the flow channel, gas is injected into the second air guide channel. The injected gas is sent to the auxiliary cavity through the first air guide channel, thereby pushing the sealing block to the left, allowing the sealing block to disengage from the sealing groove, thus opening the flow channel. The first and second raised sections prevent the sealing block from being completely removed from the inner cavity; the inclined surface of the sealing groove, the inclined section of the sealing block, the first guide surface of the flow channel, and the second guide surface on the baffle all play a guiding role, effectively preventing auxiliary materials from remaining in the corners.

[0028] 6. In this invention, the first mixed soil is stirred by a first longitudinal support rod and a second longitudinal support rod. A first stirring plate is provided inside the first longitudinal support rod, and a second stirring plate is provided inside the second longitudinal support rod. The inclination directions of each first stirring plate and each second stirring plate are opposite, which can disrupt the stirring of the first mixed soil and achieve more thorough stirring. Then, by setting a first stirring inclined rod and a second stirring inclined rod, the first mixed soil is further stirred, resulting in greater stirring intensity and better effect. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0030] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0031] Figure 3 This is a schematic diagram of the structure of the driving unit in the embodiment;

[0032] Figure 4 This is a schematic diagram of the push plate structure in the embodiment;

[0033] Figure 5 This is a cross-sectional view of the injection block in the embodiment;

[0034] Figure 6 This is a schematic diagram of the stirring component in the embodiment.

[0035] In the diagram: 11. Frame; 12. Support platform; 13. Lower end seat; 21. Lower end connecting seat; 22. Filter barrel; 221. Filter hole; 23. Upper end frame; 24. Upper end fixed seat; 25. Stroke rod; 26. Drive cylinder; 27. Pressure plate; 31. Small control valve; 32. Extension pipeline; 41. Drive seat; 42. Conducting cylinder; 421. Spiral blade; 43. Drive motor; 44. Conducting pipe; 51. Stirring seat; 52. Stirring barrel; 53. Vertical cylinder; 54. Upper end plate; 55. Stepper motor; 56. Drive shaft; 57. Push plate; 61. Through hole; 62. Injection block; 621. Injection hole; 63. Inner hole; 64. Guide channel; 65. Outer protrusion section; 651. 71. Sealing groove; 71. Lower end groove; 711. Extension arm; 72. Housing; 721. Recessed section; 73. First bolt; 74. Inner cavity; 75. Sealing block; 76. Inner spring; 77. Baffle; 78. Second bolt; 791. First protruding section; 792. Second protruding section; 81. Auxiliary cavity; 82. First air guide channel; 83. Second air guide channel; 831. Inclined surface; 832. Inclined section; 84. Graphite sealing ring; 851. First guide surface; 852. Second guide surface; 91. Transverse support rod; 921. First longitudinal support rod; 922. Second longitudinal support rod; 931. First stirring plate; 932. Second stirring plate; 941. First stirring slant rod; 942. Second stirring slant rod. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] As attached Figures 1 to 6 As shown;

[0038] This embodiment discloses a method for preparing greening planting soil using nitrogen and phosphorus polluted sediment from rivers and lakes, including the following steps:

[0039] Step S1: Collect nitrogen and phosphorus polluted sediment from rivers and lakes, and filter the mud and water in the sediment through a separation unit to obtain the first mixed soil.

[0040] Step S2: After the first mixed soil has been left to stand for 1 hour, auxiliary materials are added to the first mixed soil, and then the second mixed soil is obtained after being stirred by the mixing unit.

[0041] Step S3: Send the second mixed soil to the ventilation room and add microbial compound inoculant to promote the rapid decomposition of the second mixed soil, thus obtaining planting soil that can be used as landscaping soil.

[0042] The auxiliary materials in step S2 include straw powder, chicken manure and superphosphate;

[0043] For every 1000 kg of the first mixed soil, 510 kg of straw powder, 500 kg of chicken manure, and 50 kg of superphosphate should be added.

[0044] The microbial compound agent includes Bacillus subtilis, sulfur bacteria, and Bacillus licheniformis in a mass ratio of 1:0.1-0.5:0.1-0.2; the amount of this microbial compound agent added is 2-3% of the amount of the second mixed soil.

[0045] In this embodiment, the final planting soil has a moisture content of less than 30% and a pH value that is close to neutral. The addition of microbial compound inoculants makes the organic matter content in the planting soil higher than 22%, thereby greatly improving soil fertility and meeting the needs of greening planting soil.

[0046] In step S1, the separation unit includes a frame 11 serving as a load-bearing structure. A support platform 12 extending longitudinally upward is fixedly installed at the lower end of the frame 11, and a transverse lower end seat 13 is fixedly installed at the lower end of the frame 11. The lower end seat 13 is located in front of the support platform 12 and blocks the lower half of the support platform 12. A separation component that can filter out mud and water in the bottom sediment is installed at the upper end of the support platform 12. The separation component includes a lower end connecting seat 21 fixedly installed on the support platform 12, and a cylindrical filter is fixedly installed at the upper end of the lower end connecting seat 21. The filter barrel 22 has an opening at its upper end. An upper frame 23 is fixedly mounted on the support platform 12, and an upper fixing seat 24 is fixedly mounted on the upper frame 23. A stroke rod 25 that can move longitudinally is provided inside the upper fixing seat 24. A drive cylinder 26 connected to the stroke rod 25 is fixedly mounted at the upper end of the upper frame 23 to provide driving force for the longitudinal movement of the stroke rod 25. The lower end of the stroke rod 25 extends out of the upper fixing seat 24, and a pressure plate 27 is fixedly mounted at its lower end. The cross-sectional width of the pressure plate 27 is adapted to the internal diameter of the filter barrel 22.

[0047] A number of filter holes 221 are provided on the outer peripheral wall of the lower half of the filter barrel 22. The pressure plate 27 can press the bottom mud placed in the filter barrel 22 under the drive of the stroke rod 25, and squeeze the mud and water in the bottom mud out of the filter holes 221 to achieve the purpose of filtering mud and water.

[0048] The lower connecting seat 21 is separated from the filter barrel 22. The lower connecting seat 21 has a connecting channel inside. The lower end of the lower connecting seat 21 extends vertically downward and is set on the pushing unit. A small control valve 31 is fixedly set at the bottom of the side of the filter barrel 22. One end of the small control valve 31 is connected to the inside of the filter barrel 22, and the other end is connected to the connecting channel in the lower connecting seat 21 through the extension pipe 32.

[0049] The driving unit includes a drive base 41 fixed on the lower end seat 13, and an inclined upward transmission cylinder 42 fixedly installed on the drive base 41. The lower end connecting seat 21 is connected to the transmission cylinder 42. A spiral blade 421 is installed inside the transmission cylinder 42. A drive motor 43 is fixedly installed on the drive base 41, connected to the spiral blade 421 and driving the spiral blade 421 to rotate. Through the rotation of the spiral blade 421, the bottom mud that has been filtered and removed from the mud and water falling into the transmission cylinder 42 is transferred to the end of the transmission cylinder 42.

[0050] In step S2, the stirring unit includes a stirring seat 51 located to the right of the transmission cylinder 42. A stirring tank 52 is fixedly mounted on the stirring seat 51. The end of the transmission cylinder 42 is connected to the interior of the stirring tank 52 via a transmission pipe 44. Vertical cylinders 53 are fixedly mounted on both sides of the stirring seat 51. An upper end plate 54 is fixedly mounted on the upper end of the two cylinders 53. A stepper motor 55 is fixedly mounted on the upper end plate 54. A drive shaft 56 is fixedly mounted on the lower end of the stepper motor 55. A stirring component is fixedly mounted on the lower end of the drive shaft 56. A push plate 57 is fixedly mounted in the middle section of the drive shaft 56. The push plate 57 can move down into the stirring tank 52 and adhere to the inner wall of the stirring tank 52.

[0051] The push plate 57 has an inner hole 63 at its upper end for the drive shaft 56 to pass through. Six through holes 61 are regularly opened at the upper end of the push plate 57, and an injection block 62 is fixedly installed in each through hole 61. The lower end of the injection block 62 is flush with the lower end of the push plate 57 and tightly fits the corresponding through hole 61. The upper end of the injection block 62 has an injection hole 621 for injecting auxiliary materials. The inside of the injection block 62 has a longitudinal guide channel 64. The right end of the lower half of the guide channel 64 has an outward protrusion 65, and a sealing groove 651 is opened in the outward protrusion 65. The lower end of the injection block 62 has a lower end groove 71, and a housing 72 is installed in the lower end groove 71. The left end of the housing 72 has a recessed section 721. The injection block 62 is provided with an extension arm 711 that can extend into the recessed section 721, and a first bolt 73 that can be screwed into the housing 72 is provided on the extension arm 711.

[0052] The housing 72 has a transverse inner cavity 74, and a sealing block 75 is slidably disposed in the inner cavity 74. The sealing block 75 is located to the left of the sealing groove 651. The interior of the sealing block 75 is hollowed out, and an inner spring 76 is compressed between the sealing block 75 and the left end wall of the inner cavity 74. The elastic force of the inner spring 76 pushes the sealing block 75 into the sealing groove 651 to cut off the flow channel 64. A baffle 77 is disposed on the right side of the housing 72. The baffle 77 is fixed to the injection block 62 by a second bolt 78. The baffle 77 has a through hole corresponding to the position of the inner cavity 74, and a first protrusion 791 is disposed on the inner wall of the through hole. A second protrusion 792 is disposed on the outer wall of the sealing block 75. The abutment of the first protrusion 791 and the second protrusion 792 prevents the sealing block 75 from being completely dislodged from the inner cavity 74.

[0053] An auxiliary cavity 81 is provided between the second protrusion 792 located at the lower end of the sealing block 75 and the baffle 77. The auxiliary cavity 81 still exists when the first protrusion 791 and the second protrusion 792 abut against each other. A first air guide channel 82 communicating with the auxiliary cavity 81 is provided in the housing 72. A second air guide channel 83 communicating with the first air guide channel 82 is provided in the injection block 62. The second air guide channel 83 extends to the upper end face of the injection block 62.

[0054] The convex section 65 has an inclined inclined surface 831, the sealing block 75 has an inclined section 832, and a sealing ring is provided on the inclined section 832; the left side of the flow channel 64 is provided with an inclined first guide surface 851, and the upper end of the baffle 77 is provided with a second guide surface 852 that is connected to the first guide surface 851, and the two form a smooth surface.

[0055] The stirring component includes two transverse support rods 91 fixedly mounted on the drive shaft 56. The two transverse support rods 91 are spaced apart. The left ends of the two transverse support rods 91 are connected by a first longitudinal support rod 921, and the right ends are connected by a second longitudinal support rod 922. The first longitudinal support rod 921 and the second longitudinal support rod 922 are respectively provided with a first spacer cavity and a second spacer cavity. A plurality of inclined first stirring blades 931 are regularly arranged in the first spacer cavity, and a plurality of inclined second stirring blades 932 are regularly arranged in the second spacer cavity. The inclination direction of each first stirring blade 931 and each second stirring blade 932 is opposite.

[0056] An inclined first stirring bar 941 is provided between the drive shaft 56 and the first longitudinal support rod 921, and an inclined second stirring bar 942 is provided between the drive shaft 56 and the second longitudinal support rod 922. The first stirring bar 941 and the second stirring bar 942 are parallel.

[0057] The working principle of this embodiment is as follows:

[0058] The working principle of the separation unit is as follows: the collected nitrogen and phosphorus polluted sediment from rivers and lakes is poured into the filter barrel 22. The drive cylinder 26 controls the pressure plate 27 to move downward. The pressure plate 27 can press the sediment placed in the filter barrel 22 and squeeze the mud and water in the sediment out of the filter holes 221, thus achieving the purpose of filtering the mud and water. The cross-sectional width of the pressure plate 27 is adapted to the inner diameter of the filter barrel 22, thereby effectively preventing the sediment from overflowing to the upper end of the pressure plate 27. After filtering the mud and water in the sediment, the small control valve 31 is opened. The filtered mud and water in the sediment is transported to the connecting channel through the extension pipe 32 and continuously sent down to the push unit. The spiral blades 421 in the push unit, driven by the drive motor 43, transfer the sediment that has been filtered of mud and water in the transmission cylinder 42 to the end of the transmission cylinder 42.

[0059] The working principle of the mixing unit is as follows: the bottom mud that has been filtered out of mud and water and is transferred to the end of the transmission cylinder 42 is transported to the mixing tank 52 through the transmission pipe 44; the drive cylinder 26 controls the drive shaft 56 to drive the mixing component to stir the bottom mud that has been filtered out of mud and water in the mixing tank 52. The first stirring blade 931 and the second stirring blade 932 in the mixing component are tilted in opposite directions, which can disrupt the first mixed soil and achieve more thorough mixing; then, by setting the first stirring inclined rod 941 and the second stirring inclined rod 942, the first mixed soil is further stirred, resulting in greater stirring intensity and better effect. In addition, the push plate 57 is provided with six injection blocks 62, through which six different auxiliary materials can be injected respectively. In this embodiment, three injection blocks 62 are used. The injected auxiliary materials will be fully mixed with the bottom mud that has been filtered out of mud and water under the stirring of the mixing component; the inside of the injection block 62 is protected by the cooperation of the sealing block 75 and the sealing groove 651 to prevent the bottom mud from being thrown out of the mixing tank 52 during the mixing process.

[0060] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A device for producing greening planting soil from nitrogen and phosphorus polluted river and lake sediment, comprising a separation unit, a pushing unit, and a mixing unit, characterized in that: The separation unit includes a frame (11) serving as a load-bearing structure. A longitudinally extending support platform (12) is fixedly installed at the lower end of the frame (11), and a transverse lower end seat (13) is fixedly installed at the lower end of the frame (11). The lower end seat (13) is located in front of the support platform (12) and blocks the lower half of the support platform (12). A separation component that can filter out mud and water in the bottom sediment is provided at the upper end of the support platform (12). The separation component includes a lower end connecting seat (21) fixedly installed on the support platform (12), and a cylindrical filter barrel (22) is fixedly installed at the upper end of the lower end connecting seat (21). The filter barrel (22) has an opening at the top. An upper frame (23) is fixedly installed on the support platform (12), and an upper fixing seat (24) is fixedly installed on the upper frame (23). A stroke rod (25) that can move longitudinally is installed inside the upper fixing seat (24). A drive cylinder (26) connected to the stroke rod (25) is fixedly installed at the top of the upper frame (23) to provide a driving force for the stroke rod (25) to move longitudinally. The lower end of the stroke rod (25) extends out of the upper fixing seat (24), and a pressure plate (27) is fixedly installed at its lower end. The cross-sectional width of the pressure plate (27) is adapted to the internal diameter of the filter barrel (22). A plurality of filter holes (221) are provided on the outer peripheral wall of the lower half of the filter barrel (22). The pressure plate (27) can press against the bottom mud placed in the filter barrel (22) under the action of the stroke rod (25), and squeeze the mud and water in the bottom mud out of the filter holes (221) to achieve the purpose of filtering mud and water. The stirring unit includes a stirring base (51), a stirring tank (52) is fixedly mounted on the stirring base (51), vertical cylinders (53) are fixedly mounted on both sides of the stirring base (51), and an upper end plate (54) is fixedly mounted on the upper end plate (54). A stepper motor (55) is fixedly mounted on the upper end plate (54), and a drive shaft (56) is fixedly mounted on the lower end of the stepper motor (55). A stirring component is fixedly mounted on the lower end of the drive shaft (56), and a push plate (57) is fixedly mounted in the middle section of the drive shaft (56). The upper end of the push plate (57) is provided with an inner hole (63) for the drive shaft (56) to pass through. Six through holes (61) are regularly provided on the upper end of the push plate (57), and an injection block (62) is fixedly provided in each of the through holes (61). The lower end of the injection block (62) is flush with the lower end of the push plate (57) and tightly fits the corresponding through hole (61). The stirring component includes two transverse support rods (91) fixedly mounted on the drive shaft (56). There is a gap between the two transverse support rods (91). The left ends of the two transverse support rods (91) are connected by a first longitudinal support rod (921), and the right ends are connected by a second longitudinal support rod (922). The first longitudinal support rod (921) has a first spacer cavity inside, and the second longitudinal support rod (922) has a second spacer cavity inside. Several inclined first stirring blades (931) are regularly arranged in the first spacer cavity, and several inclined second stirring blades (932) are regularly arranged in the second spacer cavity. The inclination directions of each first stirring blade (931) and each second stirring blade (932) are opposite.

2. The apparatus according to claim 1, characterized in that: The lower connecting seat (21) is separated from the filter barrel (22), and the lower connecting seat (21) has a connecting channel inside; the lower end of the lower connecting seat (21) extends vertically downward and is set on the pushing unit; a small control valve (31) is fixedly set at the bottom of the side of the filter barrel (22); one end of the small control valve (31) is connected to the inside of the filter barrel (22), and the other end is connected to the connecting channel inside the lower connecting seat (21) through the extension pipe (32); The pushing unit includes a drive seat (41) fixed on the lower end seat (13), and an inclined upward transmission cylinder (42) is fixedly installed on the drive seat (41). The lower end connecting seat (21) is connected to the transmission cylinder (42). A spiral blade (421) is installed inside the transmission cylinder (42). A drive motor (43) is fixedly installed on the drive seat (41) and connected to the spiral blade (421) to drive the spiral blade (421) to rotate. By rotating the spiral blade (421), the bottom mud that has been filtered and removed from the mud and water falling into the transmission cylinder (42) is transferred to the end of the transmission cylinder (42).

3. The apparatus according to claim 2, characterized in that: The stirring seat (51) is located on the right side of the transmission cylinder (42); the end of the transmission cylinder (42) is connected to the inside of the stirring tank (52) by a transmission pipe (44), and the push plate (57) can be moved down into the stirring tank (52) and stick to the inner wall of the stirring tank (52).

4. The apparatus according to claim 3, characterized in that: The upper end of the injection block (62) is provided with an injection hole (621) for injecting auxiliary materials. The interior of the injection block (62) is provided with a longitudinal guide channel (64). A protruding section (65) is fixedly provided at the right end of the lower half of the guide channel (64), and a sealing groove (651) is provided in the protruding section (65). A lower end groove (71) is provided at the lower end of the injection block (62), and a housing (72) is provided in the lower end groove (71). A recessed section (721) is provided at the left end of the housing (72). The injection block (62) is provided with an extension arm (711) that can extend into the recessed section (721), and a first bolt (73) that can be screwed into the housing (72) is provided on the extension arm (711). The housing (72) has a transverse inner cavity (74) and a sealing block (75) is slidably disposed in the inner cavity (74). The sealing block (75) is located on the left side of the sealing groove (651). The interior of the sealing block (75) is hollowed out, and an inner spring (76) is compressed between the sealing block (75) and the left end wall of the inner cavity (74). The elastic force of the inner spring (76) pushes the sealing block (75) into the sealing groove (651) to cut off the flow channel (64). A baffle (77) is provided on the right side of the housing (72). The baffle (77) is fixed to the injection block (62) by a second bolt (78). The baffle (77) has a through hole at the position corresponding to the inner cavity (74). A first protrusion (791) is provided on the inner wall of the through hole. A second protrusion (792) is provided on the outer wall of the sealing block (75). The sealing block (75) is prevented from being completely removed from the inner cavity (74) by the abutment of the first protrusion (791) and the second protrusion (792). An auxiliary cavity (81) is provided between the second protrusion (792) located at the lower end of the sealing block (75) and the baffle (77). The auxiliary cavity (81) still exists when the first protrusion (791) and the second protrusion (792) abut against each other. A first air guide channel (82) communicating with the auxiliary cavity (81) is provided in the housing (72). A second air guide channel (83) communicating with the first air guide channel (82) is provided in the injection block (62). The second air guide channel (83) extends to the upper end face of the injection block (62).

5. The apparatus according to claim 4, characterized in that: The protruding section (65) has an inclined inclined surface (831), the sealing block (75) has an inclined section (832), and a sealing ring (84) is provided on the inclined section (832); an inclined first guide surface (851) is provided on the left side of the flow channel (64), and a second guide surface (852) is provided at the upper end of the baffle (77) in contact with the first guide surface (851), and the two form a smooth surface.

6. The apparatus according to claim 5, characterized in that: An inclined first stirring rod (941) is provided between the drive shaft (56) and the first longitudinal support rod (921), and an inclined second stirring rod (942) is provided between the drive shaft (56) and the second longitudinal support rod (922). The first stirring rod (941) and the second stirring rod (942) are parallel.

7. A method for preparing planting soil for greening using nitrogen and phosphorus polluted sediment from rivers and lakes, characterized in that, Implemented using the apparatus according to any one of claims 1-6, The method includes the following steps: Step S1, collecting nitrogen and phosphorus polluted bottom sediment from rivers and lakes, and filtering the mud and water in the bottom sediment through a separation unit to obtain a first mixed soil body; Step S2: After the first mixed soil has been left to stand for 1 hour, auxiliary materials are added to the first mixed soil, and then the second mixed soil is obtained after being stirred by the mixing unit. Step S3: Send the second mixed soil to the ventilation room and add microbial compound inoculant to promote the rapid decomposition of the second mixed soil, thus obtaining planting soil that can be used as landscaping soil.

8. A method for preparing greening planting soil using nitrogen and phosphorus polluted sediment from rivers and lakes according to claim 7, characterized in that: The auxiliary materials in step S2 include straw powder, chicken manure, and superphosphate; wherein, For every 1000 kg of the first mixed soil, 510 kg of straw powder, 500 kg of chicken manure, and 50 kg of superphosphate should be added.

9. A method for preparing greening planting soil using nitrogen and phosphorus polluted sediment from rivers and lakes according to claim 7, characterized in that: The microbial compound agent comprises Bacillus subtilis, sulfur bacteria, and Bacillus licheniformis in a mass ratio of 1:0.1-0.5:0.1-0.2; the amount of this microbial compound agent added is 2-3% of the amount of the second mixed soil.

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