Ecological soil remediation agent, preparation equipment and preparation method

Abstract

The invention discloses an ecological soil remediation agent, preparation equipment and a preparation method.The ecological soil remediation agent comprises a first slow-release layer, a second slow-release layer and a filling material, the first slow-release layer is arranged on the outer side of the second slow-release layer, and the filling material is arranged in the second slow-release layer in a filling mode; the first slow-release layer, the second slow-release layer and the filling material are combined to form the soil remediation agent. The soil remediation agent provided by the invention is composed of the slow-release layer arranged on the outer side and the filling material arranged in the soil remediation agent, the soil remediation agent can be pre-buried in soil before plants are planted, and after the outer slow-release layer is decomposed under the action of a microbial material and an external environment, the soil remediation agent can be degraded; when the plant grows normally, the filling material used for repairing the soil inside is released into the soil to repair the soil, so that the filling material used for repairing the soil is put into the soil when the plant grows normally, the filling material can be in full contact with the soil, and the soil repairing efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of soil remediation agents, and in particular relates to an ecological soil remediation agent, a preparation device and a preparation method. Background Art

[0002] Ecological soil remediation agent is a new type of biological bacteria in powder form. It has the characteristics of rapid reproduction, strong vitality, safety and non-toxicity, high temperature resistance, no inactivation during granulation and drying, and long-term preservation. It contains rich and high-value active bacteria and has the effect of improving soil structure. Ecological soil remediation agent is composed of a variety of probiotics, which greatly increases the beneficial bacteria in the soil, restores the diversity of soil microbial communities, enhances air permeability, effectively solves the problem of soil compaction, and improves the soil microecological environment.

[0003] In order to improve the microecological environment of the soil, soil remediation agents need to be periodically added in the ecological environment where harmful pathogens are easy to reproduce in the soil. In order to ensure the healthy growth of plants in the soil and prevent the soil from becoming compacted and affecting the growth of plants, soil remediation agents need to be added to the soil before planting plants. However, after the soil remediation agents are added, the soil remediation agents will gradually become inactive over time, and the soil remediation agents will not be able to repair the soil, causing the soil environment to deteriorate during the growth of plants and affecting the growth of plants. In order not to affect the growth of plants, soil remediation agents need to be added to the soil. However, in order not to destroy the growth of plants, soil remediation agents can only be added to the surface of the soil and cannot be added to the soil, affecting the repair effect of the soil remediation agents and thus affecting the growth of plants.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide an ecological soil remediation agent, a preparation device and a preparation method, which can solve the problem that the soil remediation agent is not convenient to be put into the soil when there are plants, resulting in poor remediation effect.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0007] The ecological soil remediation agent includes a first slow-release layer, a second slow-release layer and a filling material. The first slow-release layer and the second slow-release layer are slowly decomposed under the influence of the environment. At the same time, the decomposition of the slow-release layer requires a certain period of time, so that the substances in the slow-release layer can only be released after the slow-release layer is decomposed. The first slow-release layer is arranged on the outside of the second slow-release layer, and the filling material is arranged inside the second slow-release layer in a filling manner, so that the filling material can be released after the first slow-release layer and the second slow-release layer are decomposed. The first slow-release layer, the second slow-release layer and the filling material are combined to form a soil remediation agent, so that when the soil remediation agent is placed in the soil and used, the first slow-release layer will contact the soil, and the filling material inside can be released only after the first slow-release layer and the second slow-release layer are decomposed, so that the contact between the filling material and the soil can only be achieved after the first slow-release layer and the second slow-release layer are decomposed. The appearance shape of the soil remediation agent is set to an irregular shape. The appearance shape of the soil remediation agent is set to an irregular shape, so that when the soil remediation agent is put into the soil, the irregular shape contacts the soil, which can disperse the soil, increase the air permeability inside the soil, and make the force between the soil and the soil remediation agent irregular, which has a limiting effect on the compaction of the soil. The filling material includes soil remediation agent raw materials, auxiliary raw materials and inert gas. When the first slow-release layer and the second slow-release layer are decomposed, the soil remediation agent raw materials in the filling material can contact the soil, so that the soil can be repaired. At the same time, the auxiliary raw materials in the filling material can have an effect on soil repair and preventing soil compaction. The inert gas can make the soil remediation agent released after being diffused, so as to improve the uniformity of the distribution of the soil remediation agent raw materials in the soil, thereby improving the repair ability of the soil remediation agent raw materials to the soil.

[0008] In one or more embodiments of the present invention, the material of the first slow-release layer and the second slow-release layer is a biodegradable material, and the biodegradable material is one of PLA, PBS and PBAT, so that the first slow-release layer and the second slow-release layer will decompose in the soil, and the decomposed products will not cause secondary pollution to the soil. A microbial material is arranged between the first slow-release layer and the second slow-release layer, and the microbial material is methanogens. Methanogens can increase the decomposition rate of biodegradable materials. Therefore, methanogens can be selected to be filled between the first slow-release layer and the second slow-release layer, and the decomposition time of the slow-release layer can be controlled by setting the amount of methanogens. At the same time, methanogens contribute to the repair of the soil. When the methanogens decompose the slow-release layer, the harmful substances in the soil can be repaired.

[0009] In one or more embodiments of the present invention, the irregular shape of the soil remediation agent includes a spiral shape and a long strip shape, so that the soil remediation agent contacts the soil through the irregular spiral shape and the long strip shape. The shapes prepared by the first slow-release layer and the second slow-release layer match the shape of the appearance of the soil remediation agent, and the interior of the second slow-release layer is set as a hollow structure, and the hollow structure of the second slow-release layer allows the filling material to be set in the second slow-release layer.

[0010] In one or more embodiments of the present invention, a plurality of protrusions are evenly arranged on the outer surface of the first slow-release layer, so that when the soil remediation agent is pre-buried in the soil, the protrusions can contact the soil, increase the adhesion between the soil remediation agent and the soil, so that the scouring of rainwater and the like will not drive the soil remediation agent to move, so that the pre-buried soil remediation agent is evenly distributed in the soil. The shape of the plurality of protrusions is set as a cone, and the cone increases the contact area with the soil, thereby increasing the adhesion with the soil. The material of the protrusions is soil humus, which helps to repair the soil, so that the protrusions can not only increase the adhesion between the soil remediation agent and the soil, but also repair the soil.

[0011] In one or more embodiments of the present invention, the weight ratio of the soil remediation agent raw material to the auxiliary raw material is 2-5:1-2, and the soil remediation agent raw material is set to fine particles. The soil remediation agent raw material is set to fine particles so that the soil remediation agent raw material is evenly distributed when released in the soil and is easy to be absorbed by the soil, thereby improving the efficiency of soil remediation.

[0012] In one or more embodiments of the present invention, the auxiliary raw materials include diatomaceous earth, zeolite and magnetic powder. The diatomaceous earth and zeolite are both set as spherical particles. Soil compaction is a problem that needs to be solved during soil remediation. Soil compaction will cause the air permeability of the soil to deteriorate. In order to solve and avoid soil compaction, diatomaceous earth particles and zeolite particles are set in the auxiliary raw materials. When the auxiliary raw materials are released into the soil, the diatomaceous earth particles and zeolite particles will absorb moisture and expand themselves, thereby expanding the soil, thereby increasing the air permeability of the soil. At the same time, diatomaceous earth and zeolite can repair the soil and treat harmful substances in the soil. The magnetic powder is set in fine particles. Excessive heavy metals are a problem that needs to be solved during soil remediation. By setting magnetic powder, heavy metals can be adsorbed and treated. At the same time, diatomaceous earth and zeolite have the ability to adsorb and treat heavy metals.

[0013] In one or more embodiments of the present invention, the inert gas is nitrogen, and the pressure of the inert gas is set to 180-260 kPa, so that after the slow-release layer is decomposed, the filling material can be released into the soil by the pressure of the nitrogen, so that the filling material is released evenly in the soil. At the same time, the nitrogen can protect the filling in the slow-release layer, so that the activity of the filling material will not be affected before the slow-release layer is decomposed.

[0014] The preparation equipment of ecological soil remediation agent comprises:

[0015] A ball mill is used for grinding solid raw materials; soil remediation agent raw materials, diatomaceous earth raw materials, zeolite raw materials, magnetic powder raw materials and soil humus raw materials can be fully ground by the ball mill.

[0016] The emulsification equipment is used to mix and stir the raw materials, and the emulsification equipment is also used to emulsify the biodegradable materials. When the emulsification equipment is used, it can not only stir the raw materials, but also melt and emulsify the materials. Since the biodegradable materials need to be arranged on the outside of the filling materials, the biodegradable materials are melted and emulsified by the emulsification equipment and then wrapped on the outside of the filling materials.

[0017] A dry granulator is used to produce diatomite and zeolite particles, and is also used to produce irregularly shaped soil remediation agents. The diatomite particles and zeolite particles can be produced by the dry granulator, and the emulsified biodegradable material can be wrapped on the outside of the filling material to prepare an irregularly shaped soil remediation agent.

[0018] A method for preparing an ecological soil remediation agent, the preparation method comprising:

[0019] Step 1: Prepare soil remediation agent raw materials, diatomaceous earth raw materials, zeolite raw materials, magnetic powder raw materials and soil humus raw materials, and prepare corresponding biodegradable materials and microbial materials;

[0020] Step 2: Put the soil remediation agent raw material, diatomaceous earth raw material, zeolite raw material, magnetic powder raw material and soil humus raw material into a ball mill for grinding;

[0021] Step 3: respectively putting the ground diatomite raw material, zeolite raw material and soil humus raw material into a dry granulator to prepare diatomite balls, zeolite balls and soil humus cones for standby use, and stirring the ground soil remediation agent raw material and magnetic powder raw material in an emulsifying device to obtain a mixture;

[0022] Step 4: Melting the biodegradable material in an emulsification device at high temperature and obtaining an emulsion under stirring;

[0023] Step 5: Put the diatomite balls, zeolite balls, mixture and emulsion into a dry granulator, and wrap the outer side of the diatomite balls, zeolite balls and mixture with a layer of emulsion in the dry granulator. After the emulsion solidifies, a semi-finished product with a second slow-release layer is formed, and then a microbial material is arranged on the outer surface of the second slow-release layer, and the semi-finished product carrying the microbial material is put into the dry granulator again, so that the emulsion is wrapped on the outer side of the second slow-release layer, and at the same time, the cone of soil humus is sprayed on the unsolidified emulsion layer. After the emulsion solidifies, it is prepared into a finished product of the soil remediation agent. Due to the different growth cycles of different regions and different plants, the time of putting the soil remediation agent when the plants grow is different, so it is necessary to prepare a fast soil remediation agent based on factors such as the growth cycle of crops, so that the first slow-release layer and the second slow-release layer on the prepared soil remediation agent are decomposed within the time range required for the bioremediation agent to be put into use, so that the soil remediation agent can repair the soil during the entire growth cycle of the plant, so that the plant grows healthily. In order to control the decomposition time of the slow-release layer of the soil remediation agent, the amount of biomaterial added between the first slow-release layer and the second slow-release layer needs to be controlled during preparation.

[0024] In one or more embodiments of the present invention, the particle size of the various raw materials after grinding by the ball mill in step 1 is 0.1-0.2 mm, the diameter of the diatomaceous earth balls and zeolite balls in step 3 is directly set to 1-2 mm, and the temperature of the emulsification equipment in step 4 is set to 180-200°C.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) The soil remediation agent provided by the present invention is composed of a slow-release layer arranged on the outside and a filling material arranged on the inside. The soil remediation agent can be pre-buried in the soil before planting plants. When the external slow-release layer is decomposed by the microbial material and the external environment, the filling material inside for repairing the soil will be released into the soil to repair the soil, thereby achieving the goal of placing the filling material for repairing the soil into the soil when the plants grow normally, so that the filling material is in full contact with the soil, thereby improving the efficiency of soil repair;

[0027] (2) The decomposition time of the slow-release layer on the soil remediation agent provided by the present invention can be adjusted, so that the soil remediation agent can select the release time of the slow-release layer according to the planting environment and the growth cycle of the plant. When the plant grows, the filling material in the soil remediation agent will be released into the soil as scheduled, thereby ensuring that the soil environment of the plant is healthy during the growth cycle, thereby making the soil remediation agent more practical;

[0028] (3) The filling material in the soil remediation agent provided by the present invention is provided with materials that can repair the soil, adjust the density of the soil, and treat harmful substances such as heavy metals in the soil, so that the effect of soil remediation is better. At the same time, the filling material will be evenly distributed in the soil by spraying, thereby improving the efficiency of soil remediation and having good promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a cross-sectional view of an ecological soil remediation agent in one embodiment of the present invention;

[0031] Figure 2 The present invention is a flow chart of a method for preparing an ecological soil remediation agent in one embodiment of the present invention.

[0032] Description of main reference numerals:

[0033] 1-first sustained-release layer, 2-second sustained-release layer, 3-filling material, 4-diatomaceous earth beads and zeolite beads, 5-protrusions. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] like Figure 1 As shown, the ecological soil remediation agent in one embodiment of the present invention can solve the problem that the soil remediation agent is inconvenient to be placed when there are plants in the soil, resulting in poor remediation effect.

[0036] like Figure 1As shown, the ecological soil remediation agent includes a first slow-release layer 1, a second slow-release layer 2 and a filling material 3. The first slow-release layer 1 and the second slow-release layer 2 are slowly decomposed under the influence of the environment. At the same time, the decomposition of the slow-release layer requires a certain period of time, so that the substances in the slow-release layer can be released only after the slow-release layer is decomposed. The first slow-release layer 1 is arranged on the outside of the second slow-release layer 2, and the filling material 3 is arranged inside the second slow-release layer 2 in a filling manner, so that the filling material 3 can be released after the first slow-release layer 1 and the second slow-release layer 2 are decomposed. The first slow-release layer 1, the second slow-release layer 2 and the filling material 3 are combined to form a soil remediation agent, so that when the soil remediation agent is placed in the soil and used, the first slow-release layer 1 will contact the soil, and the filling material 3 inside can be released only after the first slow-release layer 1 and the second slow-release layer 2 are decomposed, so that the contact between the filling material 3 and the soil requires a certain time.

[0037] Preferably, the appearance shape of the soil remediation agent is set to an irregular shape. The appearance shape of the soil remediation agent is set to an irregular shape, so that when the soil remediation agent is placed in the soil, the irregular shape contacts the soil, which can disperse the soil, increase the air permeability inside the soil, and make the force between the soil and the soil remediation agent irregular, thereby limiting the compaction of the soil. Since it takes a certain amount of time for the filling material 3 in the soil remediation agent to contact the soil, the filling material 3 that can repair the soil can be released during the growth period of the plant, solving the problem that the soil remediation agent cannot be placed in the soil when the plant is growing.

[0038] Furthermore, the filling material 3 includes soil remediation agent raw materials, auxiliary raw materials and inert gas. When the first slow-release layer 1 and the second slow-release layer 2 are decomposed, the soil remediation agent raw materials in the filling material 3 can contact with the soil, thereby repairing the soil. At the same time, the auxiliary raw materials in the filling material 3 can repair the soil and prevent the soil from becoming compacted. The inert gas can make the filling material 3 diffuse and then be released, so as to improve the uniformity of the distribution of the filling material 3 in the soil, thereby improving the filling material 3 The ability to repair the soil.

[0039] like Figure 1As shown, the soil remediation agent is composed of a first slow-release layer 1 and a second slow-release layer 2 arranged on the outside and decomposed by slow release, and a filling material 3 arranged inside, so that when the soil remediation agent is put into the soil, the filling material 3 can be released in the soil after the first slow-release layer 1 and the second slow-release layer 2 are decomposed, so that the soil remediation agent material and the auxiliary material in the filling material 3 repair the soil, so that the soil remediation agent can be pre-buried in the soil before the plant is planted. When the first slow-release layer 1 and the second slow-release layer 2 are decomposed, the released soil remediation agent material and the auxiliary material repair the soil, so that during the growth process of the plant, the soil remediation agent will provide new filling material 3 to the inside of the soil to repair the soil, so as to improve the ability of the soil remediation agent to repair the soil, thereby improving the growth effect of the plant. At the same time, the soil remediation agent needs to be pre-buried in the soil when used. In order to ensure that the slow-release layer will not break when the soil remediation agent is pre-buried so that the filling material 3 is released in advance, the first slow-release layer 1 and the second slow-release layer 2 are provided to ensure that the soil remediation agent can be released within the planned time range, so as to achieve soil remediation in the growth stage of the plant.

[0040] Optionally, the material of the first slow-release layer 1 and the second slow-release layer 2 is a biodegradable material, and the biodegradable material is one of PLA, PBS and PBAT, so that the first slow-release layer 1 and the second slow-release layer 2 can be decomposed in the soil, and the decomposed products will not cause secondary pollution to the soil. A microbial material is arranged between the first slow-release layer 1 and the second slow-release layer 2, and the microbial material is methanogens. Methanogens can increase the decomposition rate of biodegradable materials. Therefore, methanogens can be selected to be filled between the first slow-release layer 1 and the second slow-release layer 2, and the decomposition time of the slow-release layer can be controlled by setting the amount of methanogens. At the same time, methanogens contribute to the repair of the soil. When the methanogens decompose the slow-release layer, the harmful substances in the soil can be repaired.

[0041] Preferably, the irregular shape of the soil remediation agent includes a spiral shape and a long strip shape, so that the soil remediation agent contacts the soil through the irregular spiral shape and the long strip shape. The shapes prepared by the first slow-release layer 1 and the second slow-release layer 2 match the shape of the soil remediation agent appearance, and the interior of the second slow-release layer 2 is set as a hollow structure, and the hollow structure of the second slow-release layer 2 allows the filling material 3 to be set in the second slow-release layer 2.

[0042] like Figure 1As shown, a plurality of protrusions 5 are evenly arranged on the outer surface of the first slow-release layer 1, so that when the soil remediation agent is pre-buried in the soil, the protrusions 5 can contact the soil, increase the adhesion between the soil remediation agent and the soil, so that the scouring of rainwater and the like will not drive the soil remediation agent to move, so that the pre-buried soil remediation agent can be evenly distributed in the soil. The shape of the plurality of protrusions 5 is set to be a cone, and the cone increases the contact area with the soil, thereby increasing the adhesion with the soil. The material of the protrusion 5 is soil humus, and the soil humus helps to repair the soil, so that the protrusion 5 can not only increase the adhesion between the soil remediation agent and the soil, but also repair the soil.

[0043] Specifically, the weight ratio of the soil remediation agent raw material to the auxiliary raw material is 2-5:1-2, and the soil remediation agent raw material is set to fine particles. The soil remediation agent raw material is set to fine particles so that the soil remediation agent raw material is evenly distributed when released in the soil and is easy for the soil to absorb, thereby improving the efficiency of soil remediation.

[0044] Specifically, the auxiliary raw materials include diatomaceous earth, zeolite and magnetic powder. Diatomaceous earth and zeolite are both set as spherical particles. Soil compaction is a problem that needs to be solved during soil remediation. Soil compaction will cause the air permeability of the soil to deteriorate. In order to solve and avoid soil compaction, diatomaceous earth particles and zeolite particles are set in the auxiliary raw materials. When the auxiliary raw materials are released into the soil, the diatomaceous earth particles and zeolite particles will absorb water and expand themselves, thereby expanding the soil, thereby increasing the air permeability of the soil. At the same time, diatomaceous earth and zeolite can repair the soil and treat harmful substances in the soil. The magnetic powder is set to fine particles. Excessive heavy metals are a problem that needs to be solved during soil remediation. By setting magnetic powder, heavy metals can be adsorbed and treated. At the same time, diatomaceous earth and zeolite have the ability to adsorb and treat heavy metals.

[0045] Preferably, the inert gas is nitrogen, and the pressure of the inert gas is set to 180-260 kPa, so that after the slow-release layer is decomposed, the filling material 3 can be released into the soil by the pressure of the nitrogen, so that the filling material 3 is released evenly in the soil. At the same time, the nitrogen can protect the filling in the slow-release layer, so that the activity of the filling material 3 will not be affected before the slow-release layer is decomposed.

[0046] When in use, a soil remediation agent is prepared by the first slow-release layer 1, the second slow-release layer 2 and the filling material 3. The soil remediation agent is buried in the soil before planting plants in the soil by pre-burying. As time goes by, the soil remediation agent will decompose the slow-release layer in the soil through the microorganisms in the soil and the microorganisms arranged in the first slow-release layer 1 and the second slow-release layer 2. When the first slow-release layer 1 and the second slow-release layer 2 are decomposed, the filling material 3 in the second slow-release layer 2 will be released in the soil. When the filling material 3 is released, the nitrogen pressure will spray the soil remediation agent raw materials, magnetic powder particles, diatomaceous earth balls and zeolite balls into the soil, so that the filling material 3 is evenly distributed in the soil. The soil remediation agent raw materials, magnetic powder particles, diatomaceous earth balls and zeolite balls are all in full contact with the soil to repair the soil. At the same time, the diatomaceous earth balls and zeolite balls can evacuate the soil after absorbing water and expanding, thereby increasing the air permeability of the soil.

[0047] Preparation equipment for ecological soil remediation agent, the preparation equipment includes:

[0048] Ball mill is used to grind solid raw materials; soil remediation agent raw materials, diatomaceous earth raw materials, zeolite raw materials, magnetic powder raw materials and soil humus raw materials can be fully ground by ball mill.

[0049] Emulsification equipment, the emulsification equipment is used to mix and stir the raw materials, and the emulsification equipment is also used to emulsify the biodegradable materials. When the emulsification equipment is used, it can not only stir the raw materials, but also melt and emulsify the materials. Since the biodegradable materials need to be arranged on the outside of the filling material 3, the biodegradable materials are melted and emulsified by the emulsification equipment and then wrapped on the outside of the filling material 3.

[0050] The dry granulator is used to produce diatomite and zeolite particles, and is also used to produce irregularly shaped soil remediation agents. The diatomite particles and zeolite particles can be produced by the dry granulator, and the emulsified biodegradable material can be wrapped on the outside of the filling material 3 to prepare an irregularly shaped soil remediation agent.

[0051] A method for preparing an ecological soil remediation agent, the preparation method comprising:

[0052] Step 1: Prepare soil remediation agent raw materials, diatomaceous earth raw materials, zeolite raw materials, magnetic powder raw materials and soil humus raw materials, and prepare corresponding biodegradable materials and microbial materials;

[0053] Step 2: Put the soil remediation agent raw material, diatomaceous earth raw material, zeolite raw material, magnetic powder raw material and soil humus raw material into a ball mill for grinding;

[0054] Step 3: respectively putting the ground diatomite raw material, zeolite raw material and soil humus raw material into a dry granulator to prepare diatomite balls, zeolite balls and soil humus cones for standby use, and stirring the ground soil remediation agent raw material and magnetic powder raw material in an emulsifying device to obtain a mixture;

[0055] Step 4: Melting the biodegradable material in an emulsification device at high temperature and obtaining an emulsion under stirring;

[0056] Step 5: Put the diatomaceous earth balls, zeolite balls, the mixture and the emulsion into a dry granulator, and wrap the outside of the diatomaceous earth balls, zeolite balls and the mixture with a layer of emulsion in the dry granulator. After the emulsion solidifies, a semi-finished product with a second slow-release layer 2 is formed, and then a microbial material is arranged on the outer surface of the second slow-release layer 2. The semi-finished product carrying the microbial material is put into the dry granulator again, so that the emulsion is wrapped on the outside of the second slow-release layer 2, and at the same time, the cone of soil humus is sprayed on the unsolidified emulsion layer. After the emulsion solidifies, it is prepared into a finished product of the soil remediation agent. Since the growth cycles of different plants in different regions are different, the time of adding soil remediation agents when plants grow is different. Therefore, it is necessary to prepare the required soil remediation agents based on factors such as the growth cycle of crops, so that the first slow-release layer 1 and the second slow-release layer 2 on the prepared soil remediation agent are decomposed within the time range required for the bioremediation agent release cycle, so that the soil remediation agent can repair the soil during the entire growth cycle of the plant, so that the plant grows healthily. In order to control the decomposition time of the slow-release layer of the soil remediation agent, it is necessary to control the amount of bioremediation material added between the first slow-release layer 1 and the second slow-release layer 2 during preparation.

[0057] It should be noted that in order to complete the preparation of the soil remediation agent of the present technical solution, necessary additives, such as curing agents and adhesives, will be added during the preparation.

[0058] Preferably, in step 1, the particle size of the various raw materials after grinding by the ball mill is 0.1-0.2 mm, in step 3, the particle size of the diatomaceous earth balls and the zeolite balls is directly set to 1-2 mm, and in step 4, the temperature of the emulsification equipment is set to 180-200°C.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Ecological soil remediation agent, characterized in that: The invention comprises a first slow-release layer, a second slow-release layer and a filling material, wherein the first slow-release layer is arranged on the outside of the second slow-release layer, and the filling material is arranged inside the second slow-release layer in a filling manner, and the first slow-release layer, the second slow-release layer and the filling material are combined to form a soil remediation agent, and the appearance shape of the soil remediation agent is set to an irregular shape, wherein the filling material comprises soil remediation agent raw materials, auxiliary raw materials and inert gas.

2. The ecological soil remediation agent according to claim 1, characterized in that: The materials of the first sustained-release layer and the second sustained-release layer are biodegradable materials, and the biodegradable material is one of PLA, PBS and PBAT. A microbial material is arranged between the first sustained-release layer and the second sustained-release layer, and the microbial material is methanogens.

3. The ecological soil remediation agent according to claim 1, characterized in that: The irregular shapes of the soil remediation agent include spiral and long strip shapes. The shapes of the first slow-release layer and the second slow-release layer match the shapes of the soil remediation agent, and the interior of the second slow-release layer is set as a hollow structure.

4. The ecological soil remediation agent according to claim 3, characterized in that: A plurality of protrusions are evenly arranged on the outer surface of the first sustained-release layer. The shapes of the plurality of protrusions are set to be cones, and the material of the protrusions is soil humus.

5. The ecological soil remediation agent according to claim 1, characterized in that: The weight ratio of the soil remediation agent raw material to the auxiliary raw material is 2-5:1-2, and the soil remediation agent raw material is provided in the form of fine particles.

6. The ecological soil remediation agent according to claim 5, characterized in that: The auxiliary raw materials include diatomaceous earth, zeolite and magnetic powder. The diatomaceous earth and zeolite are both configured as spherical particles, and the magnetic powder is configured as fine particles.

7. The ecological soil remediation agent according to claim 1, characterized in that: The inert gas is nitrogen, and the pressure of the inert gas is set to 180-260 kPa.

8. An apparatus for preparing an ecological soil remediation agent, used for preparing the ecological soil remediation agent as claimed in claims 1 to 7, characterized in that: The preparation equipment comprises: A ball mill, wherein the ball mill is used for grinding solid raw materials; Emulsification equipment, the emulsification equipment is used to mix and stir the raw materials, and the emulsification equipment is also used to emulsify the biodegradable materials; A dry granulator is used for making diatomaceous earth and zeolite particles, and is also used for making soil repair agents of irregular shapes.

9. A method for preparing an ecological soil remediation agent, characterized in that: The preparation method comprises: Step 1: Prepare soil remediation agent raw materials, diatomaceous earth raw materials, zeolite raw materials, magnetic powder raw materials and soil humus raw materials, and prepare corresponding biodegradable materials and microbial materials; Step 2: Put the soil remediation agent raw material, diatomaceous earth raw material, zeolite raw material, magnetic powder raw material and soil humus raw material into a ball mill for grinding; Step 3: respectively putting the ground diatomite raw material, zeolite raw material and soil humus raw material into a dry granulator to prepare diatomite balls, zeolite balls and soil humus cones for standby use, and stirring the ground soil remediation agent raw material and magnetic powder raw material in an emulsifying device to obtain a mixture; Step 4: Melting the biodegradable material in an emulsification device at high temperature and obtaining an emulsion under stirring; Step 5: Put the diatomaceous earth balls, zeolite balls, the mixture and the emulsion into a dry granulator, and wrap the outside of the diatomaceous earth balls, zeolite balls and the mixture with a layer of emulsion in the dry granulator. After the emulsion solidifies, a semi-finished product with a second sustained-release layer is formed. Then, microbial materials are arranged on the outer surface of the second sustained-release layer, and the semi-finished product carrying the microbial materials is put into the dry granulator again, so that the emulsion is wrapped on the outside of the second sustained-release layer. At the same time, the cone of soil humus is sprayed on the unsolidified emulsion layer. After the emulsion solidifies, the finished product of the soil remediation agent is prepared.

10. The method for preparing the ecological soil remediation agent according to claim 9, characterized in that: In the step 1, the ball mill grinds various raw materials into a particle size of 0.1-0.2 mm, in the step 3, the diameters of the diatomaceous earth balls and zeolite balls are directly set to 1-2 mm, and in the step 4, the temperature of the emulsification equipment is set to 180-200° C.

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