Desert and saline-alkali land treatment system

Abstract

The utility model discloses a desert and saline-alkali land treatment system. The system comprises a coal gangue powder preparation and air compression system arranged in a coal mine coal gangue storage yard, a coal gangue solid-liquid mixture preparation and application system arranged in desert and saline-alkali soil areas to be treated, and a powder conveying pipeline system for connecting the coal gangue powder preparation and air compression system and the coal gangue solid-liquid mixture preparation and application system. Coal gangue is made into powder through a crusher, a screw feeder, a compressed air station and the like, and the powder is conveyed remotely. A solid-liquid mixture is prepared through powder collection, agent addition, solid-liquid mixing and the like in a treatment area, and then the solid-liquid mixture is applied and scattered through a ditching applying and scattering vehicle, an under-pressure winding and unwinding system and a dragging hose.

Description

Technical Field

[0001] This utility model relates to desert and saline-alkali land management, and more particularly to a system for desert and saline-alkali land management. Background Technology

[0002] Desertification and saline-alkali land are serious environmental challenges facing the world today, severely impacting ecological balance, land resource utilization, agricultural production, and human life. Desert areas, due to sparse vegetation, poor soil water and fertilizer retention capacity, and frequent wind and sand activity, experience gradual land degradation, resulting in extremely low usability. Saline-alkali land, on the other hand, suffers from excessively high salt content, inhibiting normal plant growth, leading to large tracts of land abandonment, sharp declines in crop yields, and posing a significant threat to food security.

[0003] Traditional methods for desert and saline-alkali land management have many limitations. For example, in desert management, simple afforestation is often constrained by factors such as water scarcity and insufficient soil fertility, resulting in low survival rates and difficulty in forming stable vegetation communities. While physical sand control measures, such as sand barriers, can slow down wind and sand movement to some extent, their long-term effects on improving soil quality and the ecological environment are not ideal. In saline-alkali land management, commonly used water conservancy improvement methods (such as combined irrigation and drainage) consume large amounts of freshwater resources, and soil salinization is common over time. Chemical improvement methods may introduce new chemical substances, potentially causing negative impacts on the soil's ecological environment, and are also costly, making large-scale application difficult.

[0004] Coal gangue, a solid waste generated during coal mining and washing, not only occupies land resources when it is piled up in large quantities, but also causes environmental problems such as dust pollution, soil pollution, and groundwater pollution. However, coal gangue itself has some characteristics that make it potential for use in the remediation of deserts and saline-alkali lands. Coal gangue contains certain amounts of mineral elements such as silicon, aluminum, iron, calcium, and magnesium. After proper treatment, these elements can provide nutrients to the soil and improve its fertility. Its relatively stable particle structure can increase soil porosity, improve soil aeration and permeability, and help water infiltration and retention, thereby improving the harsh soil physical properties of deserts and saline-alkali lands to a certain extent. In addition, the alkaline properties of coal gangue can neutralize and regulate the acidic soils of saline-alkali lands, creating relatively suitable soil pH conditions for plant growth.

[0005] Therefore, those skilled in the art are dedicated to developing a system for using coal gangue to manage deserts and saline-alkali lands. Utility Model Content

[0006] To achieve the above objectives, this utility model first provides a system for the treatment of deserts and saline-alkali land, including a coal gangue powder preparation and compressed air system located in a first workshop, a coal gangue solid-liquid mixture preparation and application system located in a second workshop, and a powder conveying pipeline system connecting the first and second workshops; wherein, the first workshop is located at the coal gangue stockpile of a coal mine; the second workshop is located in the area to be treated in the desert and saline-alkali land; the coal gangue powder preparation and compressed air system includes a coal gangue crusher and a compressed air station; the powder conveying pipeline system includes a rigid air conveying pipe; the coal gangue solid-liquid mixture preparation system includes a powder collection device, a reagent addition and solid-liquid mixing system; the coal gangue solid-liquid mixture application system includes a trenching application vehicle, a pressurized winding and unwinding system, and a towed hose.

[0007] Furthermore, in the first plant, the crusher crushes the coal gangue to obtain coal gangue powder. The coal gangue powder enters the feeding device, which includes a screw feeder and a compressed air station. The screw feeder sends the coal gangue powder into the air conveying hard pipe through a one-way valve, and the compressed air from the compressed air station remotely transports the coal gangue powder to the second plant through the air conveying hard pipe.

[0008] Furthermore, the powder delivery pipeline system includes multiple air compression stations.

[0009] Furthermore, the main body of the powder collection device is inclinedly mounted on the spring seat and connected to the vibration motor; a filter screen is installed inside the powder collection device, and the powder outlet is below the filter screen; after the coal gangue powder enters the powder collection device, most of the air is discharged through the filter screen, while the powder is blocked by the filter screen and simultaneously vibrated by the vibration motor to be discharged through the powder outlet below.

[0010] Furthermore, the coal gangue powder discharged through the powder collection device is added to the feeding hopper and then conveyed to the storage tank by the conveyor belt; at the same time, various reagents are transported to the reaction tank for mixing and reaction and then transported to the storage tank; water is transported to the storage tank to form a coal gangue solid-liquid mixture.

[0011] Furthermore, multiple storage tanks are provided, and each storage tank is equipped with a stirring device.

[0012] Furthermore, the coal gangue solid-liquid mixture in the storage tank is connected to the trenching and spreading vehicle via a conveying pump and a towing hose; the trenching and spreading vehicle carries the towing hose to carry out trenching and spreading operations; the towing hose is wound up and unwound by a pressurized winding and unwinding device that can wind up and unwind while conveying the solid-liquid mixture.

[0013] Furthermore, the towing hose is installed on one side of the trenching spreader via a swivel joint.

[0014] Technical effect

[0015] 1. Effective utilization of resources

[0016] Coal gangue resource utilization: Turning coal gangue, a solid waste generated during coal mining and washing, into a valuable resource for desert and saline-alkali land management. This solves the problem of large-scale coal gangue accumulation occupying land resources and causing environmental pollution, realizes the resource reuse of waste, and improves the comprehensive utilization rate of resources.

[0017] 2. Significant soil improvement effect

[0018] Increase soil fertility: The mineral elements such as silicon, aluminum, iron, calcium, and magnesium contained in coal gangue can provide nutrients to the soil after processing, improve soil fertility, provide necessary nutrients for plant growth, and help establish stable vegetation communities in deserts and saline-alkali lands.

[0019] Improving soil physical properties: Its relatively stable granular structure can increase soil porosity, improve soil aeration and permeability, and enhance water infiltration and retention capacity. This not only benefits plant root growth and water absorption, but also improves soil structure, reduces soil compaction, prevents soil erosion, and enhances the soil's resistance to wind and water erosion.

[0020] Regulating soil pH: The alkaline properties of coal gangue can neutralize the acidic soil in saline-alkali land, adjusting the soil pH to a range suitable for plant growth, creating a favorable soil chemical environment for plant growth, and improving the survival rate and growth status of plants in saline-alkali land.

[0021] 3. The application process is efficient and convenient.

[0022] Highly efficient long-distance powder transport: Coal gangue powder is transported remotely to the treatment area via compressed air through air conveying pipes. Intermediate compressed air stations can be added according to the transport distance, ensuring the stability and efficiency of long-distance powder transport, reducing transportation and time costs, and improving treatment efficiency.

[0023] Precise application of solid-liquid mixtures: Using a trenching spreader, coal gangue solid-liquid mixtures can be precisely applied to the surface of deserts or saline-alkali land. The trenching spreader operates back and forth between the upper and lower work lines, and the pressurized winding and unwinding equipment ensures that the length of the tow hose is synchronized with the travel of the trenching spreader. Furthermore, the tow hose is installed on one side of the trenching spreader via a swivel joint, avoiding hose tangling and damage to the already worked area, ensuring the continuity and precision of the application operation, and improving the application quality.

[0024] 4. The system operates stably and reliably.

[0025] The powder collection device achieves efficient separation: the main body of the powder collection device is inclined and set on a spring seat and connected to a vibration motor. The internal filter screen can effectively separate coal gangue powder and air, and the vibration motor promotes the smooth discharge of powder, ensuring the stability of raw material supply in the subsequent solid-liquid mixture preparation process.

[0026] The storage tanks are thoroughly mixed: multiple storage tanks are equipped with stirring devices to ensure that the coal gangue powder, agents and water are fully and evenly mixed to form a stable solid-liquid mixture, providing uniform nutrients and improvement effects to the plants, while also improving the consistency of the application operation.

[0027] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0028] Figure 1 This is a process flow diagram of a preferred embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the feeding device in a preferred embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of a powder collection device in a preferred embodiment of the present invention;

[0031] Figure 4 This is a preferred embodiment of the present invention, showing the connection between the pressurized winding and unwinding device and the ditching and spreading vehicle's towing hose. Detailed Implementation

[0032] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0033] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0034] Using coal gangue to manage deserts and coal gangue mainly involves three steps: preparing coal gangue into coal gangue powder near the coal mine and transporting it with compressed air; constructing a pipeline system to transport the coal gangue powder remotely to deserts or saline-alkali lands; and spreading the coal gangue powder onto the surface of deserts or saline-alkali lands.

[0035] Coal gangue powder and compressed air conveying

[0036] like Figure 1 As shown, in this embodiment, at the first plant 100, an excavator 104 scoops coal gangue from a coal gangue stockpile 101 and feeds it into a crusher 103. The crusher 103 crushes the coal gangue to obtain a coal gangue powder stockpile 102. The excavator 104 adds the coal gangue powder to a feeding device 113. The feeding device 113 includes a screw feeder 1131 and a compressed air station 114. Figure 2 As shown, the screw feeder 1131 feeds coal gangue powder into the air conveying pipe 300 through the one-way valve 1132. Compressed air from the compressed air station 114 then remotely transports the coal gangue powder to the second plant 200 through the air conveying rigid pipe 300. The first plant 100 is preferably located near the coal mine. The one-way valve 1132 ensures that the coal gangue powder and compressed air in the air conveying rigid pipe 300 do not flow back into the feeding device 113.

[0037] Long-distance conveying of coal gangue powder

[0038] During the transportation process, an intermediate compressed air station 114 can be added as needed to ensure the long-distance transportation of coal gangue powder in the air conveying hard pipe 300.

[0039] Application of coal gangue solid-liquid mixture

[0040] See also Figure 1 See also Figure 3 and 4 Coal gangue powder, transported to the second workshop 200 via air conveying pipe 300, first passes through powder collection device 115. The main body of powder collection device 115 is inclinedly mounted on spring seat 1152 and connected to vibrating motor 1151. A filter screen 1153 is installed inside powder collection device 115, with a powder outlet 1154 below the filter screen 1153. After the coal gangue powder enters powder collection device 115, most of the air is discharged through filter screen 1153, while the powder is blocked by the filter screen 115 and simultaneously vibrated downwards by vibrating motor 1151, discharged through powder outlet 1154 to feeding hopper 106, and then transported to storage tank 111 via conveyor belt 107. Simultaneously, various reagents 105 are transported to reaction tank 110 for mixing and reaction before being transported to storage tank 111. Groundwater collected by deep well hoisting equipment 108 is pumped to reservoir 109. Water in reservoir 109 is transferred to storage tank 111 to form a coal gangue solid-liquid mixture. In other embodiments, the water may come from other sources, such as industrial water. Multiple storage tanks 111 may be provided, and stirring equipment may be installed in each storage tank.

[0041] The coal gangue solid-liquid mixture in storage tank 111 is connected to trenching and spreading vehicle 202 via a towing hose 205 through a transfer pump 112. The trenching and spreading vehicle 202 carries the towing hose 205 for trenching and spreading operations. The towing hose 202 is wound and unwound by a pressurized winding and unwinding device 201 that can wind and unwind the solid-liquid mixture during transport.

[0042] During application, the trenching and spreading vehicle 202 reciprocates along the working direction w between the upper working line m and the lower working line n. Simultaneously, the pressurized winding and unwinding device 201 rotates its reel, ensuring the length of the towed hose is synchronized with the stroke of the trenching and spreading vehicle 202. Furthermore, the towed hose 205 is installed on one side of the trenching and spreading vehicle 202 via a swivel joint. To prevent the hose 204 from tangling or damaging the already treated area during reciprocating operations, the trenching and spreading vehicle 202 makes a 180° turn each time it reaches the upper working line m or the lower working line n. This ensures that the towed hose 205 always travels in the same direction as the trenching and spreading vehicle 202 in the treated area, reducing friction and minimizing impact on the ground. The pressurized winding and unwinding device 201 also moves along the working direction w as the trenching and spreading vehicle 202 progresses.

[0043] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A system for desert and saline land reclamation, characterized in that, The coal gangue powder preparation and compressed air system is arranged at the first workshop, the coal gangue solid-liquid mixture preparation and spraying system is arranged at the second workshop, and the powder conveying pipeline system connects the first workshop and the second workshop; the first workshop is arranged at the coal gangue stockyard of a coal mine; the second workshop is arranged at a desert and saline-alkali land to be treated; the coal gangue powder preparation and compressed air system comprises a coal gangue crusher and a compressed air station; the powder conveying pipeline system comprises an air conveying hard pipe; the coal gangue solid-liquid mixture preparation system comprises a powder collecting device, a medicament adding and solid-liquid mixing system; the coal gangue solid-liquid mixture spraying system comprises a ditching spraying vehicle, a belt pressure winding and unwinding system and a trailing hose.

2. The system for desert and salinity management as claimed in claim 1 wherein, In the first workshop, the crusher crushes the coal gangue to obtain coal gangue powder, the coal gangue powder enters the feeding device, the feeding device comprises a screw feeder and a compressed air station, the screw feeder sends the coal gangue powder into the air conveying hard pipe through a check valve, and the compressed air from the compressed air station remotely conveys the coal gangue powder to the second workshop through the air conveying hard pipe.

3. The system for desert and salinity management as claimed in claim 1 wherein, The powder conveying pipeline system comprises a plurality of air compression stations.

4. The system for desert and salinity management as claimed in claim 1 wherein, The powder collecting device body is arranged obliquely on the spring seat and is connected with the vibration motor; a filter screen is arranged in the powder collecting device, and a powder outlet is arranged below the filter screen; after the coal gangue powder enters the powder collecting device, most of the air is discharged through the filter screen, and the powder is blocked by the filter screen and is vibrated by the vibration motor to the powder outlet below.

5. The system for desert and salinity management as claimed in claim 4 wherein, The coal gangue powder discharged through the powder collecting device is added to the feeding bin and then conveyed to the storage tank through the conveying belt; meanwhile, a plurality of medicaments are conveyed into the reaction tank for mixing reaction and then conveyed to the storage tank; water is conveyed to the storage tank to form a coal gangue solid-liquid mixture.

6. The system for desert and salinity management as claimed in claim 5 wherein, The storage tank is provided with a plurality of stirring devices.

7. The system for desert and salinity management as claimed in claim 5 wherein, The coal gangue solid-liquid mixture in the storage tank is connected to the ditching spraying vehicle through the trailing hose by the conveying pump; the ditching spraying vehicle carries the trailing hose to perform ditching spraying operation; the trailing hose is wound and unwound through the belt pressure winding and unwinding device which can wind and unwind when conveying the solid-liquid mixture fluid.

8. The system for desert and salinity management as claimed in claim 7 wherein, The trailing hose is installed on one side of the ditching spraying vehicle through the swivel joint.

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