CN113575009A - Structure and method for comprehensively treating saline-alkali soil by adopting solid wastes - Google Patents

Abstract

The invention discloses a structure for comprehensively treating saline-alkali soil by adopting solid wastes, which comprises a solid waste laying layer and a deep pit dug on the saline-alkali soil; the invention also discloses a method for comprehensively treating saline-alkali soil by adopting solid wastes, which comprises the following steps: and S1, digging a pit on the acid-base land. In the invention, the weathered coal has larger substitution amount per se in acid street, and the physical and chemical properties of the soil are improved, so that the removal of soil salt, particularly sodium ions, is facilitated, the potassium ions, the sodium ions, the calcium ions and the magnesium ions are reduced, and the mixture of desulfurized gypsum, agricultural straws, municipal sludge, weathered coal, turf and soil can be effectively improved; the turf is acidic, and through adding a proper amount of turf water when mixing to coarse sand and solid waste, can improve the deep soil in saline and alkaline land, set up simultaneously and add the pipe, the staff can add the weathered coal aqueous solution through adding the pipe according to the actual conditions that soil improved to realize the radical cure in saline and alkaline land.

Description

Structure and method for comprehensively treating saline-alkali soil by adopting solid wastes

Technical Field

The invention relates to the technical field of soil improvement and remediation, in particular to a structure and a method for comprehensively treating saline-alkali soil by adopting solid wastes.

Background

The saline-alkali soil is characterized in that the accumulation of a large amount of salt in the soil causes deterioration of a series of physical properties of the soil, the structure is sticky, the air permeability is poor, the soil temperature rises slowly, the activity of microorganisms in the soil is poor, the permeability coefficient is low, the capillary action is strong, and the salinization of surface soil is aggravated.

Saline-alkali soil is the soil after soluble salt or the substitution sodium ion concentration reaches a certain degree, the crop is difficult to a kind of soil that grows, the water salt motion is an important factor that saline-alkali soil formed, salt comes along with water, salt goes along with water, that is, because saline-alkali area soil matrix and groundwater all often contain certain salinity, groundwater level is close to the earth's surface, and when this earth's surface area is arid again, rise to the groundwater evaporation on earth's surface under the soil capillary action after, leave the salinity of dissolving in groundwater, the long-term accumulation is in the month, make soil salt content increase gradually, thereby form salt alkaline earth, saline-alkali soil is to the harm of soil physical properties: due to the accumulation of salt, physical properties of soil are deteriorated, such as structure viscosity, poor air permeability, high volume weight, slow soil temperature rise, poor activity of aerobic microorganisms in soil, slow nutrient release, low permeability coefficient and strong capillary action, and the salinization of surface soil is further caused.

Damage to plants:

1. causing physiological drought of the plant, leading the root system and the seeds of the plant to be incapable of absorbing sufficient water from the soil when sprouting, and even leading the water to be exosmosed from root cells to cause the plant to die;

2. plant tissues are damaged, protoplasm is damaged due to excessive salt in plant bodies, protein synthesis is hindered, intermediate metabolites containing nitrogen are accumulated, and cell damage is caused;

3. normal nutrition of plants is influenced, and due to competition of sodium ions, the absorption of potassium, phosphorus and other nutrient elements by the plants is reduced, and phosphorus transfer is inhibited, so that the nutrition condition of the plants is influenced;

4. the opening and closing of stomata of the plant are influenced, and under the action of high-concentration salt, the formation of starch in stomata guard cells is hindered, so that the cells cannot be closed, and the plant is easy to dry and wither.

The area of saline-alkali soil in China is about 3460 ten thousand hectares, the saline-alkali soil of cultivated land is 760 ten thousand hectares, and the salinization occurs in nearly 1/5 cultivated land, wherein the primary salinization type, the secondary salinization type and various alkalization types respectively occupy 52%, 40% and 8% of the total area. The saline-alkali soil cannot be used as an excellent cultivated land to guarantee the growth of people, but is a main reserve cultivated land in China, so that the method for radically treating the saline-alkali soil has important significance for guaranteeing national food safety and ecology, and is of great importance for the treatment of the saline-alkali soil.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a structure and a method for comprehensively treating saline-alkali soil by adopting solid wastes.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an adopt solid useless thing to synthesize structure of administering saline and alkaline land, includes solid useless thing and spreads the layer and administer the structure, gu useless thing is spread the layer and is included laying the isolation layer in the pit bottom, the upper end of isolation layer has been laid and has been planted the soil layer, it has been laid waterproof soil loss layer to plant the upper end of soil layer, the isolation layer is formed by coarse sand and solid waste mixture, it is formed by desulfurization gypsum, agricultural straw, city domestic sludge, weathered coal, grass peat and soil mixture to plant the soil layer, waterproof soil loss layer is by solid waste, the pit interpolation is equipped with adds the pipe, the upper end that adds the pipe is located waterproof soil loss layer's top, administer the structure and include the mixing box, moving mechanism is installed to the bottom of mixing box, driving motor and charge door are installed to the upper end of mixing box, the inner wall fixedly connected with diaphragm of mixing box, the diaphragm cuts apart into cavity of resorption and epicoele with the mixing box, the output end of the driving motor is fixedly connected with a rotating rod, the rotating rod penetrates through the upper end of the mixing box and is connected with the mixing box in a rotating mode, the rotating rod penetrates through the transverse plate and is connected with the mixing box in a rotating mode, the outer wall of the rotating rod is fixedly connected with a fishbone stirring mechanism, the inner bottom of the lower cavity is fixedly connected with a piston barrel, a piston is connected in the piston barrel in a sliding mode, one end of the piston is rotatably connected with a piston rod, the bottom of the rotating rod is fixedly connected with a circular plate, the piston rod is rotatably connected with the bottom of the circular plate in an eccentric mode, one end of the piston barrel is fixedly connected with a discharge pipe, a first check valve is installed on the discharge pipe, a hose matched with an adding pipe is installed at the other end of the discharge pipe, a short pipe is installed at the upper end of the piston barrel, the short pipe penetrates through the upper end of the transverse plate and is provided with a second check valve, and an L-shaped pipe is installed at the upper end of the piston barrel in a penetrating mode, the L-shaped pipe penetrates through the transverse plate and is fixedly connected with the transverse plate, and a control mechanism is arranged between the L-shaped pipe and the mixing box.

Preferably, the solid waste is ceramsite, the solid waste is formed by firing at the temperature of 800-1000 ℃, the volume weight of the solid waste is 0.25-0.7 g/cm3, the total porosity is not less than 60%, and the air vent: 20-30%.

Preferably, the material of interpolation pipe is polyethylene, and the upper end threaded connection of interpolation pipe has the upper cover, the upper end of upper cover is installed the stainless steel net.

Preferably, the moving mechanism comprises four support rods fixed at the bottom of the mixing box, and four walking wheels are fixedly mounted at the bottoms of the support rods.

Preferably, the fishbone stirring mechanism comprises an inclined rod fixed on the outer wall of the rotating rod, and a plurality of inclined short rods are fixedly connected to the outer wall of the inclined rod.

Preferably, the control mechanism includes a sealing plate penetrating through the mixing box and slidably connected to the mixing box, a through groove is formed in one side of the L-shaped pipe, the sealing plate penetrates through the through groove and abuts against the inner wall of the L-shaped pipe, an L-shaped rod is fixedly connected to the outer wall of the mixing box, a screw rod in threaded connection with the L-shaped rod is arranged on the L-shaped rod in a penetrating manner, the screw rod is rotatably connected to the sealing plate, and a handle is fixedly connected to the other end of the screw rod.

Preferably, both the inner wall and the outer wall of the L-shaped pipe are rectangular in shape.

The invention also discloses a method for comprehensively treating saline-alkali soil by adopting solid wastes, which comprises the following steps:

s1, firstly, digging a pit with the depth of 1.2 m on the acid-base ground;

s2, paving a coarse sand and solid waste mixture added with grass carbon water in the pit, namely an isolation layer, wherein the thickness of the isolation layer is 0.4m, and the upper surface of the isolation layer is flattened;

s3, paving desulfurized gypsum, agricultural straws, urban domestic sludge, weathered coal, turf and a soil mixture at the upper end of the isolation layer, namely a planting soil layer, wherein the thickness of the planting soil layer is 0.6 m;

s4, inserting the adding pipe into the planting soil layer, wherein the lower end of the adding pipe is positioned in the planting soil layer;

s5, paving solid waste, namely a waterproof soil loss layer on the upper layer of the planting soil layer, wherein the thickness of the waterproof soil loss layer is 0.2 m;

s6, adding the potassium fulvate and clean water into the mixing box through a feeding port, starting a driving motor, and driving a rotating rod and a fishbone stirring mechanism to rotate by the driving motor to form a potassium fulvate solution;

s7, the worker manually rotates the rotating handle to plug the L-shaped pipe by the sealing plate, and then the potassium fulvic acid solution is injected into the adding pipe through the matching of the hose and the adding pipe.

Preferably, the coarse sand and the solid waste are mixed by a stirrer, and a proper amount of turf water is added when the coarse sand and the solid waste are mixed.

Preferably, the desulfurized gypsum, the agricultural straws, the municipal sludge, the weathered coal, the grass peat and the soil are mixed by a mixer to form a mixture, and the humidity of the mixture formed by mixing the desulfurized gypsum, the agricultural straws, the municipal sludge, the weathered coal, the grass peat and the soil is 30%.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, as the weathered coal has a larger substitution amount per se in acid street, the physical and chemical properties of soil are improved, so that the removal of soil salt, particularly sodium ions, is facilitated, and simultaneously potassium and sodium ions, calcium and magnesium ions, desulfurized gypsum, agricultural straws, municipal sludge, weathered coal, turf and soil mixture are reduced, and the saline-alkali soil can be effectively improved; the turf is acidic, the deep soil of the saline-alkali soil can be improved by adding a proper amount of turf water when the coarse sand and the solid waste are mixed, and meanwhile, the addition pipe is arranged, so that workers can add weathered coal aqueous solution through the addition pipe according to the actual condition of soil improvement to realize radical treatment of the saline-alkali soil; simultaneously, can stir solution through driving motor, can make solution circulation flow simultaneously, be favorable to the mixture of solution, simultaneously, also can pour into solution into the interpolation intraductal, be favorable to the improvement in saline and alkaline land, so, through a driving motor, can realize multiple functions, it is more practical.

Drawings

FIG. 1 is a schematic diagram of a structure for comprehensively treating saline-alkali soil by using solid wastes according to the present invention;

FIG. 2 is a schematic view of a structural part of the comprehensive treatment of saline-alkali soil by using solid wastes according to the present invention;

FIG. 3 is a schematic diagram of solid waste layering in a structure for comprehensively treating saline-alkali soil by using solid wastes according to the invention.

In the figure: 1 isolating layer, 2 planting soil layer, 3 waterproof soil loss layer, 4 adding pipes, 5 driving motors, 6 rotating rods, 7 inclined rods, 8 inclined short rods, 9 second one-way valves, 10 mixing boxes, 11 transverse plates, 12 supporting rods, 13 traveling wheels, 14 charging ports, 15 lower cavities, 16 upper cavities, 17 round plates, 18 piston rods, 19 piston cylinders, 20 pistons, 21 discharging pipes, 22 first one-way valves, 23 hoses, 24 short pipes, 25L-shaped pipes, 26 sealing plates, 27L-shaped rods, 28 handles, 29 screw rods and 30 through grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a structure for comprehensively treating saline-alkali soil by adopting solid wastes comprises a solid waste laying layer and a treatment structure, wherein the solid waste laying layer comprises anisolation layer 1 laid at the bottom of a pit, aplanting soil layer 2 is laid at the upper end of theisolation layer 1, a waterproofsoil loss layer 3 is laid at the upper end of theplanting soil layer 2, theisolation layer 1 is formed by mixing coarse sand and solid wastes, the plantingsoil layer 2 is formed by mixing desulfurized gypsum, agricultural straws, urban domestic sludge, weathered coal, turf and soil, the waterproofsoil loss layer 3 is formed by mixing solid wastes, an addingpipe 4 is inserted into the pit, and the upper end of the addingpipe 4 is positioned above the waterproofsoil loss layer 3; wherein the solid waste is ceramsite, the solid waste is formed by firing at the temperature of 800-: 20-30%; the material that addspipe 4 is polyethylene, and the upper end threaded connection who addspipe 4 has the upper cover, and the stainless steel net is installed to the upper end of upper cover, prevents that foreign matter from getting into to add and leading to its jam in thepipe 4.

Administer the structure and includemixing box 10, moving mechanism is installed to the bottom ofmixing box 10, and moving mechanism is including fixing fourbracing pieces 12 inmixing box 10 bottom, and fourbracing pieces 12's bottom fixed mounting haswalking wheel 13, can removemixing box 10.

Drivingmotor 5 andcharge door 14 are installed to the upper end ofmixing box 10, the inner wall fixedly connected withdiaphragm 11 ofmixing box 10,diaphragm 11 is cut apart into cavity ofresorption 15 andepicoele 16 withmixing box 10, drivingmotor 5's output fixedly connected withdwang 6, dwang 6 runs throughmixing box 10's upper end and is connected rather than rotating, and dwang 6 runs throughdiaphragm 11 and is connected rather than rotating, the outer wall fixedly connected with fish bone rabbling mechanism ofdwang 6, fish bone rabbling mechanism is including fixing down thedown tube 7 at 6 outer walls of dwang, a plurality ofslope quarter butt 8 of outer wall fixedly connected with ofdown tube 7.

Interior bottom fixed connectionhead piston cylinder 19 oflower chamber 15, sliding connection haspiston 20 inpiston cylinder 19, the one end ofpiston 20 rotates and is connected withpiston rod 18, the bottom fixedly connected withplectane 17 ofdwang 6,piston rod 18 is connected with the bottom eccentric rotation ofplectane 17, the one end fixedly connected withdischarging pipe 21 ofpiston cylinder 19, installfirst check valve 22 on thedischarging pipe 21, the other end ofdischarging pipe 21 is installed and is added thehose 23 ofpipe 4 complex,nozzle stub 24 is installed to the upper end ofpiston cylinder 19,nozzle stub 24 runs through the upper end setting ofdiaphragm 11, and installsecond check valve 9 on thenozzle stub 24,L type pipe 25 runs through and installsL type pipe 25,L type pipe 25 runs throughdiaphragm 11 and rather than fixed connection.

Be equipped with control mechanism betweenL type pipe 25 and themixing box 10, control mechanism is including running throughmixing box 10 and rather than sliding connection's shrouding 26, one side ofL type pipe 25 is equipped withlogical groove 30, shrouding 26 runs throughlogical groove 30 and offsets with the inner wall ofL type pipe 25, the outer wall fixedly connected withL type pole 27 ofmixing box 10, run through on theL type pole 27 be equipped with rather than threaded connection'sscrew rod 29,screw rod 29 rotates with shrouding 26 to be connected, the other end fixedly connected withhandle 28 ofscrew rod 29, wherein the inner wall and the outer wall ofL type pipe 25 all are the rectangle shape.

The invention also discloses a method for comprehensively treating saline-alkali soil by adopting solid wastes, which comprises the following steps:

s1, firstly, digging a pit with the depth of 1.2 m on the acid-base ground;

s2, paving a coarse sand and solid waste mixture added with grass carbon water in the pit, namely anisolation layer 1, wherein the thickness of theisolation layer 1 is 0.4m, and the upper surface of the isolation layer is flattened; mixing coarse sand and solid waste by a stirrer, and adding a proper amount of turf water when mixing the coarse sand and the solid waste;

s3, paving desulfurized gypsum, agricultural straws, municipal domestic sludge, weathered coal, turf and a soil mixture at the upper end of theisolation layer 1, namely a plantingsoil layer 2, wherein the thickness of the plantingsoil layer 2 is 0.6 m; the special fertilizer is prepared by mixing desulfurized gypsum, agricultural straws, municipal domestic sludge, weathered coal, grass peat and soil through a mixer, wherein the humidity of the mixture formed by mixing desulfurized gypsum, agricultural straws, municipal domestic sludge, weathered coal, grass peat and soil is 30%;

s4, inserting the addingpipe 4 into theplanting soil layer 2, wherein the lower end of the addingpipe 4 is positioned in theplanting soil layer 2;

s5, paving solid waste, namely the water and soilloss prevention layer 3, on the upper layer of theplanting soil layer 2, wherein the thickness of the water and soilloss prevention layer 3 is 0.2 m;

s6, adding potassium fulvate and clean water into themixing box 10 through thefeeding port 14, starting thedriving motor 5, and driving the rotatingrod 6 and the fishbone stirring mechanism to rotate by thedriving motor 5 to form a potassium fulvate solution;

s7, the worker manually rotates therotating handle 28 to close the L-shaped pipe 25 with theclosing plate 26, and then injects the fulvic acid potassium solution into theaddition pipe 4 by matching thehose 23 with theaddition pipe 4.

In the invention, the weathered coal has larger substitution amount per se due to the acid street, and the physical and chemical properties of the soil are improved, so that the removal of soil salt, particularly sodium ions, is facilitated, the potassium and sodium ions, calcium and magnesium ions, desulfurized gypsum, agricultural straws, municipal sludge, weathered coal, turf and soil mixture are reduced, and the saline-alkali soil can be effectively improved; the turf is acidic, the deep soil of the saline-alkali soil can be improved by adding a proper amount of turf water when the coarse sand and the solid waste are mixed, meanwhile, the addingpipe 4 is arranged, and workers can add weathered coal water solution through the addingpipe 4 according to the actual condition of soil improvement so as to radically cure the saline-alkali soil;

when the solution needs to be improved by injecting the solution into the addingpipe 4, a worker adds potassium fulvate and water into themixing box 10 through thefeeding port 14, then manually rotates thehandle 28 to enable thesealing plate 26 not to plug the L-shaped pipe 25, then the worker starts the drivingmotor 5, the drivingmotor 5 works to drive the rotatingrod 6, theinclined rod 7 and the inclinedshort rod 8 to rotate, so that the potassium fulvate and the water can be mixed, meanwhile, the rotatingrod 6 drives thecircular plate 17 to rotate, thepiston rod 18 and thepiston 20 can intermittently reciprocate, the mixed solution enters thepiston cylinder 19 through theshort pipe 24 and the second one-way valve 9, and because the L-shaped pipe 25 is in a dredging state, the mixed solution in thepiston cylinder 19 falls into themixing box 10 again through the L-shaped pipe 25, so that the circulating mixing of the mixed solution can be realized, and the potassium fulvate in the solution is uniformly distributed;

then the staff rotates handle 28 once more, and handle 28 rotates and drivesscrew 29 and rotate to realize that shrouding 26 removes and blocksL type pipe 25, when theplectane 17 drovepiston 20 once more and removes this moment, still enter intopiston cylinder 19 fromstub pipe 24, under the thrust ofpiston 20, mixed liquid passes through dischargingpipe 21 andhose 23 and discharges, and the staff can be connected hose andinterpolation pipe 4, thereby can be to plantingsoil layer 2 and adding mixed liquid, be favorable to the improvement to the saline and alkaline land.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. The utility model provides an adopt solid useless thing to synthesize structure of administering saline and alkaline land, includes solid useless thing and spreads the layer and administer the structure, its characterized in that, solid useless thing is spread the layer and is spread including laying isolation layer (1) in the pit bottom, soil layer (2) are planted to the upper end of isolation layer (1), waterproof soil loss layer (3) have been laid to the upper end of planting soil layer (2), isolation layer (1) is formed by coarse sand and solid waste mixture, it is formed by desulfurization gypsum, agricultural straw, city domestic sludge, weathered coal, peat and soil mixture to plant soil layer (2), waterproof soil loss layer (3) are by solid waste, the interpolation is equipped with in the pit and adds pipe (4), the upper end that adds pipe (4) is located the top of waterproof soil loss layer (3), it includes mixing box (10) to administer the structure, moving mechanism is installed to the bottom of mixing box (10), driving motor (5) and charge door (14) are installed to the upper end of mixing box (10), the inner wall fixedly connected with diaphragm (11) of mixing box (10), diaphragm (11) are cut apart into lower chamber (15) and epicoele (16) with mixing box (10), the output fixedly connected with dwang (6) of driving motor (5), dwang (6) run through the upper end of mixing box (10) and are connected rather than rotating, just dwang (6) run through diaphragm (11) and are connected rather than rotating, the outer wall fixedly connected with fish bone rabbling mechanism of dwang (6), interior bottom fixedly connected with head piston cylinder (19) of lower chamber (15), sliding connection has piston (20) in piston cylinder (19), the one end rotation of piston (20) is connected with piston rod (18), the bottom fixedly connected with plectane (17) of dwang (6), piston rod (18) are connected with the bottom eccentric rotation of plectane (17), the one end fixedly connected with discharging pipe (21) of piston barrel (19), install first check valve (22) on discharging pipe (21), the other end of discharging pipe (21) is installed and is added pipe (4) complex hose (23), nozzle stub (24) are installed to the upper end of piston barrel (19), nozzle stub (24) run through the upper end setting of diaphragm (11), just install second check valve (9) on nozzle stub (24), the upper end of piston barrel (19) is run through and is installed L type pipe (25), L type pipe (25) run through diaphragm (11) and rather than fixed connection, be equipped with control mechanism between L type pipe (25) and mixing box (10).

2. The structure for comprehensively treating saline-alkali soil by using solid wastes as claimed in claim 1, wherein the solid wastes are ceramic granules, the solid wastes are fired at the temperature of 800-1000 ℃, the volume weight of the solid wastes is 0.25-0.7 g/cm3, the total porosity is not less than 60%, and the air vent: 20-30%.

3. The structure for comprehensively treating saline-alkali soil by adopting solid wastes according to claim 1, characterized in that the material of the adding pipe (4) is polyethylene, the upper end of the adding pipe (4) is in threaded connection with an upper cover, and the upper end of the upper cover is provided with a stainless steel net.

4. The structure for comprehensively treating saline-alkali soil by adopting solid wastes according to claim 1, characterized in that the moving mechanism comprises four supporting rods (12) fixed at the bottom of the mixing box (10), and walking wheels (13) are fixedly installed at the bottoms of the four supporting rods (12).

5. The structure for comprehensively treating saline-alkali soil by adopting solid wastes according to claim 1, characterized in that the fishbone stirring mechanism comprises an inclined rod (7) fixed on the outer wall of the rotating rod (6), and a plurality of inclined short rods (8) are fixedly connected on the outer wall of the inclined rod (7).

6. The structure for comprehensively treating saline-alkali soil by using solid wastes according to claim 1, wherein the control mechanism comprises a sealing plate (26) penetrating through the mixing box (10) and slidably connected with the mixing box, a through groove (30) is formed in one side of the L-shaped pipe (25), the sealing plate (26) penetrates through the through groove (30) and abuts against the inner wall of the L-shaped pipe (25), an L-shaped rod (27) is fixedly connected to the outer wall of the mixing box (10), a screw rod (29) in threaded connection with the L-shaped rod (27) is penetrated through the L-shaped rod (27), the screw rod (29) is rotatably connected with the sealing plate (26), and a handle (28) is fixedly connected to the other end of the screw rod (29).

7. The structure for comprehensively treating saline-alkali soil by adopting solid wastes according to claim 6, characterized in that the inner wall and the outer wall of the L-shaped pipe (25) are both rectangular.

8. A method for comprehensively treating saline-alkali soil by adopting solid wastes is characterized by comprising the following steps:

s1, firstly, digging a pit with the depth of 1.2 m on the acid-base ground;

s2, paving a coarse sand and solid waste mixture added with grass carbon water in the pit, namely an isolation layer (1), wherein the thickness of the isolation layer (1) is 0.4m, and the upper surface of the isolation layer is flattened;

s3, paving desulfurized gypsum, agricultural straws, municipal sludge, weathered coal, grass peat and a soil mixture at the upper end of the isolation layer (1), namely, a planting soil layer (2), wherein the thickness of the planting soil layer (2) is 0.6 m;

s4, inserting the adding pipe (4) into the planting soil layer (2), wherein the lower end of the adding pipe (4) is positioned in the planting soil layer (2);

s5, paving solid waste, namely a water and soil loss prevention layer (3), on the upper layer of the planting soil layer (2), wherein the thickness of the water and soil loss prevention layer (3) is 0.2 m;

s6, adding potassium fulvate and clean water into the mixing box (10) through the feeding port (14), starting the driving motor (5), and driving the rotating rod (6) and the fishbone stirring mechanism to rotate by the driving motor (5) to form a potassium fulvate solution;

s7, the worker manually rotates the rotating handle (28) to enable the sealing plate (26) to seal the L-shaped pipe (25), and then the potassium fulvate solution is injected into the adding pipe (4) through the matching of the hose (23) and the adding pipe (4).

9. The method for comprehensively treating saline-alkali soil by using solid wastes as claimed in claim 8, wherein the coarse sand and the solid wastes are mixed by a stirrer, and a proper amount of turf water is added when the coarse sand and the solid wastes are mixed.

10. The method for comprehensively treating saline-alkali soil by using solid wastes according to claim 8, wherein the desulfurized gypsum, the agricultural straws, the municipal sludge, the weathered coal, the grass peat and the soil are mixed by a mixer, and the humidity of the mixture of the desulfurized gypsum, the agricultural straws, the municipal sludge, the weathered coal, the grass peat and the soil is 30%.

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