Coastal saline soil fertilization repair device and repair method

Abstract

The present application relates to soil fertilization remediation device technical field, especially to a kind of coastal saline soil fertilization remediation device and remediation method. Including: case, the top of the case is respectively equipped with two storage bins, two the outlet of storage bin is equipped with discharge adjusting element, the inside of the case is equipped with with the outlet intercommunication first-stage mixing element, the rear of the first-stage mixing element is equipped with second-stage mixing element;Broken soil fertilization part, multiple broken soil fertilization part are respectively pivotally connected with case, lifting frame is equipped on the case and connected with the top of broken soil fertilization part, displacement plate is equipped on the lifting frame and connected with the center of broken soil fertilization part;The case is installed on agricultural machinery, the mixing of two raw materials and time can be completed during the journey, and the application amount can be changed in time according to salt gradient area, effectively meet various actual situations.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil fertilization remediation equipment, in particular to a coastal saline soil fertilization remediation device and method. BACKGROUND

[0002] Coastal saline soil is an important reserve arable land resource in China, but its high salt content, low organic matter, soil compaction, and low microbial activity have seriously restricted the agricultural use and ecological restoration of the land. In recent years, the combined application of biochar and microbial inoculant has been proven to be an effective saline soil improvement technology. The two are used in coordination and have good remediation effect.

[0003] Currently, the application of the two raw materials usually relies on mixing the two raw materials in advance, then using a ditching machine to open trenches at equal intervals in the sky and ground, and then applying the mixed raw materials in the trenches and performing subsequent filling and irrigation. However, the entire process requires multiple devices, the construction process is complex, and the use of the stacking and spreading method cannot be adjusted according to the salt gradient, and the entire spreading method is uncontrollable and may affect the remediation effect due to the accumulation of raw materials. SUMMARY

[0004] The present application solves the technical problems of the above-mentioned technical deficiencies, provides a coastal saline soil fertilization remediation device and method, which can mix and time the two raw materials during the travel process, and can change the application amount in time according to the salt gradient area, effectively meeting various actual situations.

[0005] To solve the above technical problems, the technical solution adopted by the present application is a coastal saline soil fertilization remediation device, comprising:

[0006] A machine box, two storage boxes are arranged above the machine box, a discharge adjusting piece is arranged at the outlet of the two storage boxes, a first mixing piece is arranged in the machine box and communicates with the outlet, and a second mixing piece is arranged behind the first mixing piece.

[0007] A soil breaking and fertilizing piece, a plurality of soil breaking and fertilizing pieces are pivotally connected to the machine box, a lifting frame is arranged on the machine box and connected to the top of the soil breaking and fertilizing piece, and a displacement plate is arranged on the lifting frame and connected to the center of the soil breaking and fertilizing piece.

[0008] Preferably, the discharge adjusting piece comprises a driving shaft and a rotating cylinder; the driving shaft is connected with the rotating shaft above the machine box, the inside of the driving shaft is symmetrically provided with a displaceable side push rod, the two ends of the driving shaft are provided with a plurality of slide columns, and the middle of the driving shaft is provided with two liquid mixing rings; the rotating cylinder is rotationally connected with the storage tank, one end of the rotating cylinder is provided with a feeding area, the other end of the rotating cylinder is provided with a mounting disc connected with the slide column, and the mounting disc is connected with the side push rod.

[0009] Preferably, the inside of the rotating cylinder is provided with a sliding disc, and the machine box is provided with a first hydraulic cylinder connected with the sliding disc.

[0010] Preferably, the first-stage mixing piece comprises a mixing cylinder and a bottom cover; the mixing cylinder is symmetrically provided with two inclined guide channels; the bottom cover is connected with the bottom of the mixing cylinder, the top of the bottom cover is provided with a material collecting cylinder, the inside of the material collecting cylinder is provided with a spiral blade, and the top of the material collecting cylinder is provided with a discharge pipeline connected with the second-stage mixing piece.

[0011] Preferably, the second-stage mixing piece comprises an outer shell and a central piece; the inside of the outer shell is sequentially provided, from top to bottom, with a volume cavity, a rotating sleeve, a mixing ring and a material distribution cavity, the inside of the rotating sleeve is provided with a plurality of first tentacles, the rotating sleeve is rotationally connected with the outer shell, the mixing ring is divided into upper, middle and lower three regions, and a plurality of flow distribution plates are respectively arranged in each region, and a mixing channel is formed between any two adjacent flow distribution plates; the top of the central piece is provided with second tentacles, and the bottom of the central piece is provided with a material distribution disc.

[0012] Preferably, the first tentacles and the second tentacles are made of rubber material, the middle of the first tentacles is symmetrically provided with a liquid inlet groove, the outside of the first tentacles is covered with a wetting piece, and the outside of the rotating sleeve is provided with a liquid supply ring.

[0013] Preferably, at least one air outlet is arranged in each mixing channel.

[0014] Preferably, the volume cavity is provided with a flow distribution piece in the shape of a horn, the center of the flow distribution piece is concentrically arranged with the inlet of the volume cavity, the top of the central piece is provided with a circular table, and the surface of the circular table is provided with a plurality of shift plates.

[0015] Preferably, the soil breaking and fertilizing piece comprises a first hollow sleeve, a second hollow sleeve and a vertical shaft; the first hollow sleeve is rotationally connected with the machine box, the lower part of the first hollow sleeve is provided with a plurality of crushing pieces; the second hollow sleeve penetrates into the inside of the first hollow sleeve and rotates synchronously with the first hollow sleeve, the top of the second hollow sleeve is rotationally connected with the lifting frame, the bottom of the second hollow sleeve is provided with two cutters, the inside of the cutters is provided with a material guiding space, and one side of the cutters is provided with a discharge port in communication with the material guiding space; the bottom of the vertical shaft is provided with a tapered head, and the top of the vertical shaft is connected with a displacement plate.

[0016] Preferably, the lifting frame bottom is provided with a Y-shaped sleeve, and the area below the vertical shaft is provided with a plurality of short shifting columns.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The device integrates mixing, discharging and crushing functions, and reasonably designs the communication between the structures, so that the work can be completed during the movement, the construction process is simplified, no preparation is needed in advance, and the work efficiency is greatly improved.

[0019] 2. The design of the discharging adjusting member can adjust the continuous feeding or the quantitative feeding according to the requirements of the raw materials during the discharging process, and can be adjusted in time according to the actual situation, and the structure can realize synchronous adjustment under the premise of meeting the rotation.

[0020] 3. The cooperation between the primary mixing member and the secondary mixing member can cooperatively complete the sufficient mixing of two kinds of raw materials, ensure the synergistic effect of the raw materials after application, and the secondary mixing member adopts a multiple mixing structure, which effectively shortens the traditional mixing time requirement by combining active mixing and passive mixing movements, and meets the rapid mixing in actual use.

[0021] 4. During the secondary mixing process, a specific liquid is generated, which is applied to the surface of the biochar particles and the bio-agent particles during the mixing process, which can effectively improve the effect of the two, and the wetted particles can improve the cohesion, reduce segregation, and improve the mixing uniformity.

[0022] 5. By applying the air hole in the mixing channel, the posture of the raw materials can be adjusted during the falling process to assist in mixing, and an upward airflow area can be formed at the bottom to stabilize the spray operation in the middle region of the secondary mixing member.

[0023] 6. The soil breaking and fertilizing member completes the crushing of the soil during the movement, and the cutting knife completes the spreading of the mixed raw materials, increases the spreading area, and can realize the small-range soil layer distribution by the small-range axial lifting of the cutting knife itself.

[0024] 7. The structure design of the soil breaking and fertilizing member can complete the soil breaking operation simultaneously during the fertilizing operation, has high structure integration, and can realize quantitative point fertilization by cooperating with the design of the vertical shaft, and can form linear spreading. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic view of a coastal saline soil fertilization and repair device.

[0026] Figure 2 Schematic diagram of the arrangement of the discharge adjustment element;

[0027] Figure 3 Schematic diagram of the structure of the discharge adjustment element;

[0028] Figure 4 Schematic diagram of the structure at the rotating cylinder;

[0029] Figure 5 Schematic diagram of the structure of the sliding disc;

[0030] Figure 6 Schematic diagram of the full section of the drive shaft;

[0031] Figure 7 Schematic diagram of the structure of the primary mixing element;

[0032] Figure 8 Schematic diagram of the structure at the collecting cylinder;

[0033] Figure 9 Schematic diagram of the internal structure of the secondary mixing element;

[0034] Figure 10 Schematic diagram of the internal structure of the volume cavity;

[0035] Figure 11 Schematic diagram of the connection of the rotating sleeve and the mixing ring;

[0036] Figure 12 Schematic diagram of the structure of the rotating sleeve;

[0037] Figure 13 Schematic diagram of the full section of the first tentacle;

[0038] Figure 14 Schematic diagram of the internal structure of the mixing ring;

[0039] Figure 15 Schematic diagram of the structure of the central element;

[0040] Figure 16 Schematic diagram of the installation of the soil-breaking and fertilizing element;

[0041] Figure 17 Schematic diagram of the structure of the soil-breaking and fertilizing element;

[0042] Figure 18 Schematic diagram of the connection of the second hollow sleeve and the vertical shaft;

[0043] Figure 19 Schematic diagram of the structure of the vertical shaft;

[0044] Figure 20 Sectional view of the first distribution pipe;

[0045] Figure 21 Schematic diagram of the arrangement of the distribution element.

[0046] In the figure: 1, case; 2, discharge adjustment piece; 3, primary mixing piece; 4, secondary mixing piece; 5, soil breaking and fertilizing piece; 6, lifting frame; 7, displacement plate; 8, outer shell; 9, center piece; 10, volume cavity; 11, rotating sleeve; 12, mixing ring; 13, distribution cavity; 14, distribution piece; 101, storage tank; 102, first hydraulic cylinder; 201, drive shaft; 202, rotating cylinder; 203, side push rod; 204, sliding column; 205, liquid distribution ring; 206, feeding area; 207, mounting disc; 208, sliding disc; 301, mixing cylinder; 302, bottom cover; 303, guide channel; 304, material collecting cylinder; 305, helical blade; 306, discharge pipeline; 501, first hollow sleeve; 502, second hollow sleeve; 503, vertical shaft; 504, breaking piece; 505, cutter; 506, material guiding space; 507, discharge port; 508, tapered head; 509, short push column; 601, sleeve; 901, second tentacle; 902, distribution disc; 903, circular table; 904, push plate; 1001, flow distribution piece; 1101, first tentacle; 1102, liquid inlet groove; 1103, wetting piece; 1104, liquid supply ring; 1105, atomizing nozzle; 1201, flow distribution plate; 1202, mixing channel; 1203, air outlet; 1401, first distribution pipe; 1402, inflatable air bag; 1403, air blowing port; 1404, reset piece. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the present application clearer, further detailed explanations will be given below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessary confusion of the concept of the present application.

[0048] Embodiment one: in conjunction with Figures 1-21 As shown in the figure, a coastal saline soil fertilization repair device includes: a case 1, two storage tanks 101 are arranged above the case 1, the two storage tanks 101 respectively store biological agent particles and biological carbon particles, discharge adjustment pieces 2 are arranged at the outlets of the two storage tanks 101, the discharge adjustment pieces 2 can adjust the discharge function, a primary mixing piece 3 is arranged inside the case 1 and communicates with the outlet, a secondary mixing piece 4 is arranged behind the primary mixing piece 3, the mixing of the two raw materials can be quickly completed after two times of mixing, soil breaking and fertilizing pieces 5 are pivotally connected to the case 1, lifting frames 6 are arranged on the case 1 and connected to the top of the soil breaking and fertilizing pieces 5, displacement plates 7 are arranged on the lifting frames 6 and connected to the center of the soil breaking and fertilizing pieces 5, the soil is broken and the fertilization operation is completed during the travel, and the fertilization layer is adjusted during the fertilization to improve the uniformity of distribution.

[0049] In preferred embodiments, in combination Figures 1-4 As shown, the discharge adjusting member 2 comprises a driving shaft 201 and a rotating cylinder 202; the middle region of the driving shaft 201 is connected with the rotating shaft above the machine box 1, the inside of the driving shaft 201 is symmetrically provided with a displaceable side push rod 203, the side push rod 203 is displaced by hydraulic drive, the two ends of the driving shaft 201 are provided with a plurality of slide columns 204, the middle part of the driving shaft 201 is provided with two liquid mixing rings 205, the liquid mixing rings 205 are communicated with the external liquid supply device, the middle part of the liquid mixing ring 205 has an annular groove, which can keep communication with the liquid inlet of the driving shaft 201 during the rotation of the driving shaft 201, the rotating cylinder 202 is rotatably connected with the discharge port of the storage tank 101, the center of the rotating cylinder 202 has a certain volume space, and one end of the rotating cylinder 202 is provided with a feeding area 206, which is composed of a space composed of a plurality of feeding teeth, which is similar to a gear structure and can realize continuous feeding operation, the other end of the rotating cylinder 202 is provided with a mounting disc 207 connected with the slide column 204, the mounting disc 207 is processed with a plurality of through holes sleeved with the slide column 204, the two form a sliding connection, and the center of the mounting disc 207 is fixedly connected with the side push rod 203 through screws, the position of the feeding area 206 and the volume space can be adjusted by controlling the displacement of the side push rod 203, so as to realize the switching of functions.

[0050] In preferred embodiments, in order to reduce the length size of the rotating cylinder 202 and realize the size adjustment of the internal volume space, in combination Figures 4-5 As shown, the rotating cylinder 202 is internally provided with a sliding disc 208, the middle region of the sliding disc 208 is slidably connected with the right side of the rotating cylinder 202, and the right end of the sliding disc 208 has a contact ring, the machine box 1 is provided with a first hydraulic cylinder 102, an extension plate is arranged on the push rod of the first hydraulic cylinder 102, the lower part of the extension plate has a slot with a thickness equal to that of the contact ring, which clamps the contact ring and does not affect the normal rotation of the sliding disc 208, the sliding disc 208 is displaced by the first hydraulic cylinder 102, which can realize the adjustment of the volume space, and when switching to the continuous operation state, the opening position of the volume space is completely covered by the sliding disc 208, which realizes the closure of the volume space and optimizes the length of the rotating cylinder 202 as a whole.

[0051] In combination Figure 6 As shown, the inside of the driving shaft 201 has a liquid inlet channel and a liquid outlet channel, the communication ports of the two channels are respectively connected with the liquid mixing rings 205, by injecting hydraulic oil into the liquid inlet channel, the side push rod 203 can be pushed to displace outward, and when liquid is injected through the liquid outlet channel, the side push rod 203 is pushed to reset.

[0052] In preferred embodiments, in combination Figure 7 and Figure 8As shown, the primary mixing element 3 comprises a mixing cylinder 301 and a bottom cover 302; two inclined guide channels 303 are symmetrically arranged above the mixing cylinder 301, the guide channels 303 are communicated with the discharge port of the storage tank 101, and the dropped raw materials slide into the mixing cylinder 301 along the guide channels 303; the bottom cover 302 is fixedly connected with the bottom of the mixing cylinder 301, a vertical material collecting cylinder 304 is arranged at the upper center of the bottom cover 302, and a spiral blade 305 is arranged inside the material collecting cylinder 304; a first motor is installed at the bottom of the bottom cover 302 for driving the spiral blade 305 to rotate, thereby realizing the mixing and lifting of the raw materials; an outlet pipeline 306 connected with the secondary mixing element 4 is arranged above the material collecting cylinder 304, and the preliminarily mixed raw materials enter the secondary mixing element 4 through the outlet pipeline 306; wherein, by changing the pitch of the spiral blade 305, and changing the material or surface roughness treatment of the spiral blade 305, the contact friction with the granular raw materials can be effectively increased, thereby improving the lifting effect.

[0053] In the preferred embodiment, in combination with Figures 8-15 As shown, the secondary mixing element 4 comprises an outer sleeve 8 and a central element 9; a volume cavity 10, a rotating sleeve 11, a mixing ring 12 and a material distribution cavity 13 are sequentially arranged inside the outer sleeve 8 from top to bottom, the volume cavity is connected with the outlet pipeline 306, a plurality of first tentacles 1101 are uniformly arranged inside the rotating sleeve 11, and the rotating sleeve 11 is rotationally connected with the outer sleeve 8; a second motor is arranged inside the outer sleeve 8, a gear is installed outside the rotating sleeve 11, the second motor is meshingly connected with the gear, and the outer sleeve 8 has supports connected with both ends of the rotating sleeve 11, forming rotation and support; the mixing ring 12 is divided into upper, middle and lower three regions, and a plurality of flow distribution plates 1201 are arranged in each region, the flow distribution plates 1201 are twisted, and the flow distribution plates 1201 in each region are arranged in a staggered manner, realizing continuous flow distribution and mixing; a mixing channel 1202 is formed between two adjacent flow distribution plates 1201, providing a falling space for the raw materials; the central element 9 has second tentacles 901 distributed above and a material distribution disc 902 arranged below; a third motor is arranged at the bottom of the central element 9 for driving the central element 9 to rotate; after the raw materials fall through the volume cavity 10, the first tentacles 1101 and the second tentacles 901 rub and change their positions, realizing rapid mixing, and then the raw materials fall to the mixing ring 12 to be mixed again, effectively ensuring uniform mixing of the two, improving the synergistic management effect after fertilization, and the raw materials are continuously pushed to each pipeline through the material distribution disc 902 and delivered to each soil breaking and fertilizing element 5.

[0054] In the preferred embodiment, in order to improve the mixing effect and the efficiency of the raw materials, in combination with Figure 12 and Figure 13The first tentacle 1101 and the second tentacle 901 are made of rubber material, and are flat, so as to change the position of the raw material and prevent the raw material from being damaged by the elasticity. The middle part of the first tentacle 1101 is symmetrically provided with a liquid inlet groove 1102. The rotating sleeve 11 is hollow, and is filled with a solution. The liquid inlet groove 1102 is in communication with the inner space of the rotating sleeve 11. The first tentacle 1101 is covered with a wetting member 1103. In the falling process of the raw material, the surface of the raw material is wetted by being pressed against the surface of the wetting member 1103, and the biochar is activated, so as to provide a “nutrient soup” and a “protective umbrella” for the biological bacteria, thereby greatly improving the synergistic repair effect of the biological bacteria and the biochar in the saline soil. The rotating sleeve 11 is externally provided with a liquid supply ring 1104. The liquid supply ring is in communication with an external liquid supply device. The liquid supply ring 1104 has a circular ring groove in the inside. The sliding groove is connected with the liquid inlet of the rotating sleeve 11, so as to keep the liquid supply continuous and not affect the normal rotation of the rotating sleeve. The liquid supply pressure should not be too large, and needs to be kept stable. The wetting member 1103 can be a sponge structure.

[0055] The solution in the liquid inlet groove 1102 is a biogas slurry / retting liquid fertilizer, which is a natural fermentation liquid of a biogas tank and straw / leaf (needs to be filtered). The components include small-molecule organic acids, humus, nitrogen, phosphorus, potassium and various trace elements. The solution can “charge” the biochar, so that the biochar becomes a slow-release fertilizer carrier. The solution can stimulate the colonization and activity of microorganisms (including exogenous bacterial agents). The cost is low, and the ecological cycle effect is good.

[0056] The humic acid / fulvic acid solution is a 1-3% water-soluble humic acid or fulvic acid solution. The solution can be compounded by adding 0.1% glucose or 0.5% molasses as a carbon source. The solution can improve the surface properties of the biochar, increase the negative charge, improve the cation exchange capacity (CEC) and the fertilizer retention capacity, directly stimulate microorganisms, and improve the survival rate and metabolic activity of the bacterial agents in adverse conditions, promote plant growth, and indirectly benefit the rhizosphere microorganisms.

[0057] The seaweed extract solution is diluted according to the product instructions (usually 0.1-0.5%). The components include natural plant hormones (such as auxins and cytokinins), polysaccharides and amino acids. The solution is a strong biological stimulant, which can significantly enhance the stress resistance (salt tolerance and drought tolerance) of microorganisms, so that the microorganisms can colonize more quickly in the coastal saline soil, promote seed germination and root development, and expand the rhizosphere effect zone.

[0058] The molasses / glucose solution is a 1-5% water-soluble sugarcane molasses or glucose solution. Attention should be paid to the fact that a high concentration is easy to attract miscellaneous bacteria or produce heat by fermentation. The solution provides a readily available carbon source for exogenous bacterial agents and indigenous microorganisms, rapidly activates the microbial community, is simple and low in cost, but the amount needs to be controlled.

[0059] Preferred embodiments, in combination Figure 14 As shown, at least one air outlet hole 1203 is arranged in each mixing channel 1202, which can assist in changing the position of the falling raw materials, and the airflow moves into the rotating sleeve 11 upwards, and when the spray is applied inside, the stability of the internal space is realized.

[0060] Preferred embodiments, in combination Figure 9 and Figure 10 As shown, a diverter 1001 in the shape of a horn is arranged in the volume cavity 10, and the center of the diverter 1001 is concentrically arranged with the inlet of the volume cavity 10, the top of the center piece 9 is provided with a circular table 903, and the surface of the circular table 903 is provided with a plurality of paddles 904, which can separate the falling raw materials into two parts during the falling process, and the middle part of the raw materials is thrown to the surrounding area through the paddles 904, and further mixing is realized by contacting with the external raw materials, and the rotating sleeve 11 and the mixing ring 12 form a three-stage mixing mode.

[0061] In combination Figure 12 As shown, for the application of the solution, an atomizing spray head 1105 can also be arranged in the rotating sleeve 11 to improve the application effect on the raw materials by generating a solution spray; wherein the selection of the solution can also be the following types:

[0062] Mineral nutrient solution, low-concentration KH2PO4 (dihydrogen potassium phosphate, 0.5-1%), (NH4)2SO4 (ammonium sulfate, 0.5%) or KCl (potassium chloride, 0.5%) solution, targetedly supplementing P, K and N, converting biochar into special slow-release fertilizer (such as "phosphorus synergistic carbon"), and solving the specific nutrient deficiency of the soil;

[0063] Alkaline solution (for acid soil), dilute NaOH or Ca(OH)2 (limewater) solution, only applicable to acid soil improvement, usually alkaline for coastal saline soil, forbidden, improving the pH and CEC of biochar, and enhancing the adsorption capacity of the biochar to acidic ions;

[0064] Metal ion solution, extremely low-concentration Fe³⁺ and Mn²⁺ solution, giving the biochar magnetic properties or catalytic activity, and the modified biochar can participate in redox reactions, which may affect the N2O reduction process (need to be researched and verified), high risk, and needs to be cautious.

[0065] Optimal recommended scheme (for coastal saline soil), using "humic acid solution + molasses" composite spray: formula: 2% humic acid + 2% molasses aqueous solution, double synergies, humic acid providing biological stimulation and modification, and molasses providing readily available carbon source, which can significantly improve the colonization success rate of salt-tolerant functional bacteria (such as nosZ bacteria) in a high-salt environment, does not change the pH of the soil, is not easy to block the spray head, and can be easily integrated with the spray system on the equipment.

[0066] Preferred embodiments, in combination Figures 16-19 As shown, the soil breaking and fertilizing member 5 includes a first hollow sleeve 501, a second hollow sleeve 502, and a vertical shaft 503; the first hollow sleeve 501 is connected with the machine box 1 as a rotating shaft, a hydraulic motor is installed on the machine box 1, the hydraulic motor is connected with each first hollow sleeve 501 through a chain wheel and a chain, a plurality of breaking pieces 504 are arranged below the first hollow sleeve 501, and the breaking pieces 504 complete soil breaking during rotation; the second hollow sleeve 502 penetrates into the inside of the first hollow sleeve 501 to form a sliding connection and synchronous rotation with the inside of the first hollow sleeve 501, the top of the second hollow sleeve 502 is connected with the lifting frame 6 as a rotating shaft, and two cutting knives 505 are arranged at the bottom of the second hollow sleeve 502, the inside of the cutting knives 505 is provided with a material guiding space 506, one side of the cutting knives 505 is provided with a material discharge port 507 in communication with the material guiding space 506, during rotation, the raw material is thrown out through the material discharge port, and the raw material in the second hollow sleeve 502 is also distributed into the material guiding space 506 by using centrifugal force; the bottom of the vertical shaft 503 is provided with a tapered head 508, and the top of the vertical shaft 503 is connected with a displacement plate 7, the tapered head 508 realizes the bottom of the second hollow sleeve 502, and can realize the bottom of the material discharge.

[0067] Preferred embodiments, in combination Figure 17 and Figure 19 As shown, the bottom of the lifting frame 6 is provided with a Y-shaped sleeve 601, the sleeve 601 is connected with the second-stage mixing member 4 through a pipeline on the side end of the sleeve 601 for receiving the mixed raw material, and the bottom of the sleeve 601 is inserted into the second hollow sleeve 502 to realize the entry of the raw material; a plurality of short stirring columns 509 are arranged in the area below the vertical shaft 503, and the stirring columns 509 can realize stirring of the internal raw material during rotation of the second hollow sleeve 502 to prevent accumulation.

[0068] Preferred embodiments, in combination Figure 18 As shown, a metal ring can be additionally arranged between the two cutting knives 505, the metal ring is fixed between the cutting knives 505 by welding, the bottom of the second hollow sleeve 502 has a notch with the same shape as the material guiding space 506, the metal ring is sleeved with the second hollow sleeve 502 and is fixed by using a screw, the metal ring realizes communication with the material guiding space 506, can be installed, removed and adjusted in position according to needs, and can block the notch to make the raw material discharged from the bottom of the second hollow sleeve 502 to realize quantitative point discharge or linear fertilization.

[0069] In combination Figure 18 As shown, the upper position of the second hollow sleeve 502 is provided with a guide strip, and the upper position of the first hollow sleeve 501 is provided with a guide groove in sliding connection with the guide strip, the guide groove can drive the second hollow sleeve 502 to rotate synchronously and maintain relative displacement.

[0070] In combination Figure 19 As shown, the tapered head 508 is provided with a semicircular baffle with a certain height, which can avoid the influence of soil during fertilization.

[0071] In combination Figure 20 And Figure 21 As shown in the figure, in order to improve the distribution efficiency and accuracy of the mixed raw materials, a distribution part 14 can be installed at the middle position below the case 1, which includes a horizontal box and a first distribution pipe 1401. One end of the first distribution pipe 1401 penetrates through the horizontal box and is connected to the bottom of the secondary mixing part 4, and the other end is connected to the sleeve 601 through a pipeline. The upper part of the first distribution pipe is provided with two elastic reset sheets, and the reset sheets are provided with inflatable air bags. The position of the inflatable air bag 1402 close to the upper part is provided with a blowing port 1403. The blowing port 1403 and the inflatable air bag 1402 are respectively communicated with the external gas supply device through a pipeline. By relying on the inflation of the air bag, the reset sheet 1404 can push the first distribution pipe 1401 to cut off, and by cooperating between the two reset sheets 1404, the control of the amount of raw materials can be realized, which facilitates the accurate application of raw materials. At the same time, the blowing port 1403 can assist in pushing the material, improving the application efficiency.

[0072] Working principle: The case 1 is connected with the lifting device part of the agricultural machine, the inside of the case 1 is provided with a solvent storage tank, and is connected with the secondary mixing part 4. After the raw material particles are mixed twice, they are transported into the second hollow sleeve 502, and the fertilizer distribution work is completed during the rotation of the cutter 505. During the travel process, a certain degree of lifting operation can be performed, which improves the dispersibility and uniformity of the material distribution and completes the soil repair operation.

[0073] A repair method using the coastal saline soil fertilizer repair device, comprising:

[0074] S1, raw material preparation: the biological carbon particles and salt-tolerant functional microbial agent particles with suitable particle size are respectively loaded into two storage boxes 101; activation solution preparation: prepare an activation solution, recommend using "2% humic acid + 2% molasses" composite solution (the best solution for coastal saline soil), inject into the solvent storage tank in the case 1, and connect to the liquid supply ring 1104; fix the whole device on the rear part of the tractor and other agricultural machinery through the case 1, connect the hydraulic, electric power and liquid supply pipeline, and ensure the normal power supply of each motor (drive spiral blade, rotating sleeve, center part).

[0075] S2, select the feeding mode, then according to the soil salt content detection result and the repair target, control the amount of material discharged per unit time by adjusting the rotating speed of the drive shaft 201 and the stroke of the hydraulic cylinder 102.

[0076] S3, after two-stage mixing and activation, the device advances under the traction of the agricultural machine. The first hollow sleeve 501 drives the lower crushing piece 504 to rotate, crushing and loosening the surface hard soil. The mixed particles treated by activation are pushed by the distribution disc 902 to the Y-shaped sleeve 601 of each soil-breaking and fertilizing part 5, and enter the inside of the second hollow sleeve 502.

[0077] S4, after fertilization, moderate covering and light irrigation can be carried out to promote the combination of particles and soil and the colonization of microorganisms. Regular monitoring of soil salinity, pH, organic matter content, microbial activity and other indicators is needed to evaluate the repair effect.

[0078] Application example: Location: A saline-alkali land improvement demonstration area in Binhe New Area of Yancheng City, Jiangsu Province (originally a reclamation land), area: 100 mu (about 6.67 hectares), soil type: typical coastal saline soil, initial problem: high soil salinity, serious hardening, lack of organic matter, and extremely low microbial activity, unable to carry out normal agricultural production.

[0079] Repair target: Reduce the average electrical conductivity (EC) of the 0-20 cm soil layer from >4.0 dS / m to <2.0 dS / m, increase the soil organic matter content to >15 g / kg, significantly improve the soil aggregate structure, increase the porosity, restore the soil microbial activity, and support crop planting.

[0080] Specifically, the device is used in combination with biochar: rice husk biochar, particle size 2-5 mm, dosage: 3 tons / ha, functional microbial agent: salt-tolerant composite microbial agent (containing nitrogen-fixing bacteria, phosphorus-solubilizing bacteria, Bacillus, etc.), effective viable count ≥2 billion / g, dosage: 600 kg / ha, activation liquid: use the optimal formula recommended by the patent - 2% humic acid + 2% molasses aqueous solution. Prepare 500L for activation treatment of the entire 100 mu area.

[0081] Device operation parameter settings:

[0082] Parameter item Setting value Explanation Operation mode Continuous feeding Suitable for large-area homogeneous plots Travel speed 3 km / h Ensure uniform mixing and fertilization Soil breaking depth 15 cm Break up the hardened layer Fertilization depth 10-15 cm Deeply apply to the layer where roots are mainly distributed Discharge rate Biochar: 300 kg / h; microbial agent: 60 kg / h Continuous mixing in proportion Mixing system Primary mixing speed: 80 rpm; secondary mixing speed: 120 rpm Ensure sufficient mixing Flow rate of activating liquid 5 L / min Uniformly wet the surface of mixed particles Operation time April 15 - April 17, 2025 Spring, conducive to microbial colonization

[0083] Operation process, biochar and microbial agent are loaded into two storage tanks respectively, activation liquid is prepared and injected into the solvent tank, liquid supply system is connected, device is mounted on the rear of 120 horsepower tractor, depth of soil breaking and fertilizing part is adjusted, device is started, tractor is driven at a uniform speed of 3 km / h, device automatically completes: discharging, primary mixing, secondary mixing (synchronous activation), soil breaking, deep application, after operation is completed, light covering and sprinkling irrigation (5 mm) are carried out.

[0084] Before repair operation (April 14, 2025) and 90 days after repair (July 16, 2025), 10 points in the demonstration area are randomly selected for soil sampling (0-20 cm), and the average value is compared and analyzed:

[0085] Detection index Before repair (average value) 90 days after repair (average value) Change rate National standard reference for cultivated land Electrical conductivity (EC, dS / m) 4.2 1.8 ↓ 57.1% <2.0 (slightly saline soil) pH value 8.9 8.2 ↓ 7.8% 5.5-8.5 Organic matter (g / kg) 8.5 18.3 ↑ 115.3% >15 (medium fertility) Total nitrogen (g / kg) 0.52 0.89 ↑ 71.2% - Available phosphorus (mg / kg) 3.8 12.6 ↑ 231.6% >10 (abundant) Available potassium (mg / kg) 45 88 ↑ 95.6% >50 (abundant) Soil bulk density (g / cm³) 1.58 1.32 ↓ 16.5% <1.4 (loose) >0.25 mm aggregate (%) 18.7 42.3 ↑ 126.2% >30 (good structure) Microbial biomass carbon (mg / kg) 120 380 ↑ 216.7% Significantly increased

[0086] Soil profile photo comparison (description):

[0087] Before repair: soil hardening, grayish white, obvious cracks, almost no granular structure;

[0088] 90 days after repair: the soil is loose, the color turns to brown, and the root system (wheat planted in the test) is developed;

[0089] Salt content is significantly reduced: EC value decreases by 57.1%, successfully reduces from heavy saline soil to light saline soil range, and achieves the repair target. This is mainly due to the ion adsorption of biochar and the improved soil structure to promote salt leaching, the fertility is greatly improved, the organic matter content is doubled, the available nutrients are significantly increased, which provides a good foundation for crop growth, the soil structure is fundamentally improved: the bulk density is reduced, the aggregate content is greatly increased, the hardening problem is effectively solved, the soil ventilation and water permeability are enhanced, the biological activity is restored: the microbial biomass carbon increases by more than 2 times, which proves that the activation liquid (humic acid + molasses) effectively promotes the colonization and reproduction of functional bacteria and indigenous microorganisms, forming a healthy soil micro-ecology.

[0090] Device advantages: a single device can complete 100 mu of work in 3 days, far exceeding the efficiency of the traditional multi-step method of "mixing first, then ditching, and then fertilizing", the built-in activation system of the device ensures that the biochar and bacteria are "awakened" before application, significantly improving the biological effectiveness of the repair agent, and the soil breaking and fertilizing part realizes 10-15 cm deep application, which makes the repair agent reach the key soil layer and avoids the loss and invalidity of surface application.

[0091] In summary, the application case proves that through integrated operation and key activation and synergistic technology, the coastal saline soil can be efficiently and quickly improved, in actual application, only 90 days are needed to achieve the comprehensive repair effect of significantly reducing soil salt content, significantly improving organic matter and nutrients, fundamentally improving soil structure and microbial activity, and completely achieving the predetermined target. The device provides a mechanized, intelligent and efficient solution for large-scale saline soil remediation, and has broad application prospects.

[0092] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all variations and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A coastal saline soil fertilization remediation device, characterized by , comprising: A machine box (1), two storage boxes (101) are arranged above the machine box (1) respectively, a discharge adjusting piece (2) is arranged at the outlet of the two storage boxes (101), a primary mixing piece (3) is arranged in the machine box (1) and communicates with the outlet, and a secondary mixing piece (4) is arranged behind the primary mixing piece (3); A soil breaking and fertilizing piece (5) is pivotally connected with the machine box (1), a lifting frame (6) is arranged on the machine box (1) and connected with the top of the soil breaking and fertilizing piece (5), and a displacement plate (7) is arranged on the lifting frame (6) and connected with the center of the soil breaking and fertilizing piece (5); The secondary mixing piece (4) comprises an outer sleeve (8) and a center piece (9); a volume cavity (10), a rotating sleeve (11), a mixing ring (12) and a distribution cavity (13) are sequentially arranged in the outer sleeve (8) from top to bottom, a plurality of first tentacles (1101) are arranged in the rotating sleeve (11), the rotating sleeve (11) is rotationally connected with the outer sleeve (8), the mixing ring (12) is divided into three regions, i.e., an upper region, a middle region and a lower region, a plurality of flow distribution plates (1201) are arranged in each region, and a mixing channel (1202) is formed between two adjacent flow distribution plates (1201); the center piece (9) is provided with a second tentacle (901) at the top and a distribution disc (902) at the bottom; The first tentacle (1101) and the second tentacle (901) are both made of rubber material, a liquid inlet groove (1102) is symmetrically arranged in the middle of the first tentacle (1101), the first tentacle (1101) is covered with a wetting piece (1103), and a liquid supply ring sleeve (1104) is arranged outside the rotating sleeve (11); The soil breaking and fertilizing piece (5) comprises a first hollow sleeve (501), a second hollow sleeve (502) and a vertical shaft (503); the first hollow sleeve (501) is pivotally connected with the machine box (1), a plurality of crushing pieces (504) are arranged below the first hollow sleeve (501); the second hollow sleeve (502) penetrates into the first hollow sleeve (501) and rotates synchronously with the first hollow sleeve (501), the top of the second hollow sleeve (502) is rotationally connected with the lifting frame (6), the bottom of the second hollow sleeve (502) is provided with two cutters (505), the cutter (505) is provided with a material guiding space (506) and a material discharging port (507) which communicates with the material guiding space (506) on one side; and the vertical shaft (503) is provided with a taper head (508) at the bottom and is connected with the displacement plate (7).

2. A coastal saline soil fertilization remediation device according to claim 1, characterized in that: The discharge adjusting piece (2) includes a driving shaft (201) and a rotating cylinder (202); the driving shaft (201) is connected with the rotating shaft above the cabinet (1), the inside of the driving shaft (201) is symmetrically provided with a displaceable side push rod (203), the two ends of the driving shaft (201) are provided with a plurality of slide columns (204), and the middle part of the driving shaft (201) is provided with two liquid mixing rings (205); the rotating cylinder (202) is rotationally connected with the storage tank (101), one end of the rotating cylinder (202) is provided with a feeding area (206), the other end is provided with a mounting disc (207) connected with the slide column (204), and the mounting disc (207) is connected with the side push rod (203).

3. A coastal saline soil fertilization remediation device according to claim 2, characterized in that: The inside of the rotating cylinder (202) is provided with a sliding disc (208), and the cabinet (1) is provided with a first hydraulic cylinder (102) connected with the sliding disc (208).

4. The coastal saline soil fertilization remediation device according to claim 1, characterized in that: The first-stage mixing piece (3) includes a mixing cylinder (301) and a bottom cover (302); the mixing cylinder (301) is symmetrically provided with two inclined guide channels (303); the bottom cover (302) is connected with the bottom of the mixing cylinder (301), the top of the bottom cover (302) is provided with a material collecting cylinder (304), a spiral blade (305) is arranged in the material collecting cylinder (304), and the top of the material collecting cylinder (304) is provided with a discharge pipeline (306) connected with the second-stage mixing piece (4).

5. The coastal saline soil fertilization remediation device of claim 1, wherein: At least one air outlet (1203) is arranged in each mixing channel (1202).

6. A coastal saline soil fertilization remediation device according to claim 1, characterized in that: The volume cavity (10) is provided with a horn-shaped flow dividing piece (1001), the center of the flow dividing piece (1001) is concentrically arranged with the inlet of the volume cavity (10), the top of the center piece (9) is provided with a circular truncated cone (903), and the surface of the circular truncated cone (903) is provided with a plurality of shift plates (904).

7. A coastal saline soil fertilization remediation device according to claim 1, characterized in that: The bottom of the lifting frame (6) is provided with a Y-shaped sleeve (601), and the lower region of the vertical shaft (503) is provided with a plurality of short shift columns (509).

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