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CN-117694200-B - Method for preparing greening planting soil by utilizing river and lake nitrogen and phosphorus polluted sediment

CN117694200BCN 117694200 BCN117694200 BCN 117694200BCN-117694200-B

Abstract

The invention discloses a method for preparing greening planting soil by utilizing river, lake and nitrogen and phosphorus polluted bottom mud, which comprises the following steps of collecting the river, lake and nitrogen and phosphorus polluted bottom mud, and filtering the muddy water in the bottom mud through a separation unit to obtain a first mixed soil body; and (3) standing the first mixed soil body for 1 hour, adding auxiliary materials into the first mixed soil body, then carrying out enhanced stirring by a stirring unit to obtain a second mixed soil body, conveying the second mixed soil body to a ventilation chamber, and adding a microbial composite microbial inoculum to promote the rapid decomposition of the second mixed soil body to obtain the planting soil which can be used as soil for landscaping. The invention has the following advantages and effects that a complete standardized treatment chain is designed, the river, lake and phosphorus polluted bottom mud is improved, greening planting soil is prepared, waste is changed into valuable, and the recycling of the bottom mud is realized.

Inventors

  • TAN YANZHONG
  • Hu Caijie
  • QIU JINSHENG
  • FU LI

Assignees

  • 中国电建集团中南勘测设计研究院有限公司

Dates

Publication Date
20260505
Application Date
20240112

Claims (9)

  1. 1. The utility model provides a device that utilizes river lake nitrogen phosphorus to pollute substrate mud to make afforestation planting soil, includes separation unit, promotes unit and stirring unit, its characterized in that: the separating unit comprises a frame (11) as a bearing structure, a supporting table (12) extending longitudinally and upwards is fixedly arranged at the lower end of the frame (11), a transverse lower end seat (13) is fixedly arranged at the lower end of the frame (11), the lower end seat (13) is positioned in front of the supporting table (12) and blocks the lower half part of the supporting table (12), a separating member capable of filtering muddy water in bottom mud is arranged at the upper end of the supporting table (12), the separating member comprises a lower end connecting seat (21) fixedly arranged on the supporting table (12), a barrel-shaped filter barrel (22) is fixedly arranged at the upper end of the lower end connecting seat (21), an opening is formed at the upper end of the filter barrel (22), an upper end frame (23) is fixedly arranged on the supporting table (12), an upper end fixing seat (24) is fixedly arranged on the upper end of the upper end frame (23), a longitudinal pressing plate (25) is fixedly arranged at the upper end of the upper end connecting seat (24), a stroke rod (25) is fixedly arranged at the lower end of the lower stroke rod (25), a stroke rod (25) is fixedly arranged at the upper end of the upper end (25) of the stroke rod (25), a stroke rod (25) is fixedly arranged at the upper end of the stroke rod (25), the section width of the pressing plate (27) is matched with the diameter of the inside of the filter vat (22); A plurality of filtering holes (221) are arranged on the peripheral wall of the lower half part of the filtering barrel (22), the pressing plate (27) can be pressed on the bottom mud arranged in the filtering barrel (22) under the drive of the travel rod (25) and extrude the mud water in the bottom mud out of the filtering holes (221) to achieve the purpose of filtering the mud water, The stirring unit comprises a stirring seat (51), a stirring barrel (52) is fixedly arranged on the stirring seat (51), longitudinal vertical air cylinders (53) are fixedly arranged on two sides of the stirring seat (51), an upper end plate (54) is fixedly arranged at the upper ends of the two vertical air cylinders (53), a stepping motor (55) is fixedly arranged on the upper end plate (54), a driving shaft (56) is fixedly arranged at the lower end of the stepping motor (55), a stirring member is fixedly arranged at the lower end of the driving shaft (56), a pushing plate (57) is fixedly arranged at the middle section of the driving shaft (56), An inner hole (63) for a driving shaft (56) to pass through is formed at the upper end of the pushing plate (57), six through holes (61) are regularly formed at the upper end of the pushing plate (57), an injection block (62) is fixedly arranged in each through hole (61), the lower end of the injection block (62) is leveled with the lower end of the pushing plate (57) and is tightly attached to the corresponding through hole (61), The stirring component comprises two transverse struts (91) fixedly arranged on a driving shaft (56), a space is reserved between the two transverse struts (91), the left end parts of the two transverse struts (91) are connected through a first longitudinal strut (921), the right end parts of the two transverse struts are connected through a second longitudinal strut (922), a first spacing cavity is formed in the first longitudinal strut (921), a second spacing cavity is formed in the second longitudinal strut (922), a plurality of inclined first stirring sheets (931) are regularly arranged in the first spacing cavity, a plurality of inclined second stirring sheets (932) are regularly arranged in the second spacing cavity, and the direction of inclination of each first stirring sheet (931) is opposite to that of each second stirring sheet (932).
  2. 2. The device of claim 1, wherein the lower end connecting seat (21) is separated from the filter vat (22), a connecting channel is arranged in the lower end connecting seat (21), the lower end of the lower end connecting seat (21) extends downwards longitudinally and is arranged on the pushing unit, a small control valve (31) is fixedly arranged at the bottom of the side of the filter vat (22), one end of the small control valve (31) is connected with the inside of the filter vat (22), and the other end of the small control valve is connected with a connecting channel in the lower end connecting seat (21) through an extension pipeline (32); The pushing unit comprises a driving seat (41) fixed on a lower end seat (13), an inclined upward conduction cylinder (42) is fixedly arranged on the driving seat (41), a lower end connecting seat (21) is connected with the conduction cylinder (42), a spiral blade (421) is arranged in the conduction cylinder (42), a driving motor (43) connected with the spiral blade (421) and driving the spiral blade (421) to rotate is fixedly arranged on the driving seat (41), and the bottom mud of filtered muddy water falling into the conduction cylinder (42) is transmitted to the end part of the conduction cylinder (42) through the rotation of the spiral blade (421).
  3. 3. The device according to claim 2, wherein the stirring seat (51) is located at the right side of the conducting tube (42), the end of the conducting tube (42) is connected with the inside of the stirring barrel (52) through a conducting tube (44), and the pushing plate (57) can move downwards into the stirring barrel (52) and is attached to the inner wall of the stirring barrel (52).
  4. 4. The device of claim 3, wherein the upper end of the injection block (62) is provided with an injection hole (621) for injecting auxiliary materials, the inside of the injection block (62) is provided with a longitudinal conduction flow channel (64), the right end of the lower half part of the conduction flow channel (64) is fixedly provided with an outer convex section (65), the outer convex section (65) is provided with a sealing groove (651), the lower end of the injection block (62) is provided with a lower end groove (71), the lower end groove (71) is provided with a shell (72), the left end of the shell (72) is provided with a concave section (721), the injection block (62) is provided with an extension arm (711) which can extend into the concave section (721), and the extension arm (711) is provided with a first bolt (73) which can be screwed into the shell (72); The sealing device is characterized in that a transverse inner cavity (74) is formed in the shell (72), a sealing block (75) is slidably arranged in the inner cavity (74), the sealing block (75) is arranged on the left side of the sealing groove (651), a through hole is formed in the sealing block (75) and is arranged in a hollowed-out mode, an inner spring (76) is arranged between the sealing block (75) and the left end wall of the inner cavity (74) in a compressed mode, the sealing block (75) is pushed to be embedded into the sealing groove (651) through the elastic acting force of the inner spring (76) so as to cut off a conducting flow channel (64), a baffle plate (77) is arranged on the right side of the shell (72), the baffle plate (77) is fixed with an injection block (62) through a second bolt (78), a through hole is formed in the position of the baffle plate (77) corresponding to the inner cavity (74), a first bulge section (791) is arranged on the inner wall of the through hole, and a second bulge section (792) is arranged on the outer wall of the sealing block (75), and the whole inner cavity (74) is prevented from being separated by the first bulge section (791) and the second bulge section (74); An auxiliary cavity (81) is formed between a second protruding section (792) positioned at the lower end of the sealing block (75) and the baffle plate (77), the auxiliary cavity (81) still exists when the first protruding section (791) is propped against the second protruding section (792), a first air guide channel (82) communicated with the auxiliary cavity (81) is formed in the shell (72), a second air guide channel (83) communicated with the first air guide channel (82) is formed in the injection block (62), and the second air guide channel (83) extends to the upper end face of the injection block (62).
  5. 5. The device according to claim 4, wherein the outer convex section (65) is provided with an inclined surface (831), the sealing block (75) is provided with an inclined section (832), a sealing ring (84) is arranged on the inclined section (832), an inclined first guide surface (851) is arranged on the left side of the conducting flow passage (64), a second guide surface (852) connected with the first guide surface (851) is arranged at the upper end of the baffle plate (77), and the two guide surfaces form a smooth surface.
  6. 6. The apparatus according to claim 5, wherein: A first inclined stirring inclined rod (941) is arranged between the driving shaft (56) and the first longitudinal supporting rod (921), a second inclined stirring inclined rod (942) is arranged between the driving shaft (56) and the second longitudinal supporting rod (922), and the first stirring inclined rod (941) and the second stirring inclined rod (942) are parallel.
  7. 7. A method for preparing greening planting soil by utilizing river and lake nitrogen and phosphorus polluted sediment is characterized in that, Implemented with the device according to any one of claims 1-6, S1, collecting bottom mud polluted by nitrogen and phosphorus in rivers and lakes, and filtering the muddy water in the bottom mud through a separation unit to obtain a first mixed soil body; s2, standing the first mixed soil body for 1 hour, adding auxiliary materials into the first mixed soil body, and then carrying out reinforced stirring by a stirring unit to obtain a second mixed soil body; And S3, conveying the second mixed soil body to a ventilation chamber, and adding a microbial composite microbial inoculum to promote the quick decomposition of the second mixed soil body, so as to obtain the planting soil which can be used as the soil for landscaping.
  8. 8. The method for preparing greening planting soil by utilizing river, lake and nitrogen and phosphorus polluted substrate sludge as defined in claim 7, wherein the auxiliary materials in the step S2 comprise straw powder, chicken manure and calcium superphosphate, 510Kg of straw powder, 500kg of chicken manure and 50kg of calcium superphosphate are added into each 1000kg of first mixed soil body.
  9. 9. The method for preparing greening planting soil by utilizing river, lake and nitrogen and phosphorus polluted substrate sludge according to claim 7, wherein the microbial composite microbial inoculum comprises bacillus subtilis, vulcanized bacteria and bacillus licheniformis in a mass ratio of 1:0.1-0.5:0.1-0.2, and the addition amount of the microbial composite microbial inoculum is 2-3% of the amount of the second mixed soil mass.

Description

Method for preparing greening planting soil by utilizing river and lake nitrogen and phosphorus polluted sediment Technical Field The invention relates to the field of ecological environment, in particular to a method for preparing greening planting soil by utilizing river and lake nitrogen and phosphorus polluted bottom sludge. Background In the river and lake water environment renovation, channel dredging and harbor construction engineering, hundreds of millions of parts of waste sludge can be generated in China each year, the river and lake sludge cannot be directly used for engineering or plant planting due to the characteristics of high water content, low strength, poor permeability, complex components, slow consolidation process and the like, the sludge can be directly deposited on the air space after dredging, land resources are occupied for a long time, the sludge is accumulated at the bottom of the river and lake for a long time, water is deteriorated and smelly, and in addition, the land resources are increasingly strained in the urban process of China. The existing treatment for the river, lake and nitrogen and phosphorus polluted bottom mud lacks a complete standardized treatment chain, and if the river, lake and nitrogen and phosphorus polluted bottom mud can be improved to prepare greening planting soil, the problems caused by the bottom mud can be effectively solved, waste is turned into wealth, and the recycling of the bottom mud is realized. Disclosure of Invention The invention aims to provide a method for preparing greening planting soil by utilizing river, lake and nitrogen and phosphorus polluted sediment, which aims to solve the problems in the background technology. The technical aim of the invention is to realize the method for preparing greening planting soil by utilizing river, lake and nitrogen and phosphorus polluted bottom mud by the following technical scheme: S1, collecting bottom mud polluted by nitrogen and phosphorus in rivers and lakes, and filtering the muddy water in the bottom mud through a separation unit to obtain a first mixed soil body; s2, standing the first mixed soil body for 1 hour, adding auxiliary materials into the first mixed soil body, and then carrying out reinforced stirring by a stirring unit to obtain a second mixed soil body; And S3, conveying the second mixed soil body to a ventilation chamber, and adding a microbial composite microbial inoculum to promote the quick decomposition of the second mixed soil body, so as to obtain the planting soil which can be used as the soil for landscaping. The preparation method is further provided that the auxiliary materials in the step S2 comprise straw powder, chicken manure and calcium superphosphate, 510Kg of straw powder, 500kg of chicken manure and 50kg of calcium superphosphate are added into each 1000kg of first mixed soil body. The microbial composite microbial agent is further arranged to comprise bacillus subtilis, vulcanized bacteria and bacillus licheniformis in a mass ratio of 1:0.1-0.5:0.1-0.2, wherein the addition amount of the microbial composite microbial agent is 2-3% of the amount of the second mixed soil body. The separating unit in the step S1 comprises a frame serving as a bearing structure, a supporting table longitudinally extending upwards is fixedly arranged at the lower end of the frame, a transverse lower end seat is fixedly arranged at the lower end of the frame, a travel rod capable of longitudinally moving is arranged in the upper end of the supporting table and is blocked at the lower half part of the supporting table, a separating member capable of filtering muddy water in bottom mud is arranged at the upper end of the supporting table, the separating member comprises a lower end connecting seat fixedly arranged on the supporting table, a barrel-shaped filter barrel is fixedly arranged at the upper end of the lower end connecting seat, an opening is formed at the upper end of the filter barrel, an upper end frame is fixedly arranged on the supporting table, an upper end fixing seat is fixedly arranged on the upper end frame, a travel rod capable of longitudinally moving is arranged in the upper end fixing seat, a driving force of the upper end frame is fixedly arranged on the upper end of the travel rod so as to provide longitudinal movement for the rod, a driving force of the travel rod is fixedly arranged at the upper end of the upper end frame, a cylindrical filter barrel is fixedly arranged at the lower end of the filter barrel, the lower end of the filter barrel is fixedly arranged at the lower end of the filter barrel, and the filter barrel is fixedly arranged at a pressing plate with the diameter which is matched with the diameter; A plurality of filtering holes are formed in the peripheral wall of the lower half part of the filtering barrel, the pressing plate can be driven by the stroke rod to press bottom mud in the filtering barrel, and mud water in the bottom mud is extr