CN110788125B - Be used for prosthetic solidification stabilization system of soil - Google Patents
Be used for prosthetic solidification stabilization system of soil Download PDFInfo
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- CN110788125B CN110788125B CN201911030658.6A CN201911030658A CN110788125B CN 110788125 B CN110788125 B CN 110788125B CN 201911030658 A CN201911030658 A CN 201911030658A CN 110788125 B CN110788125 B CN 110788125B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
Abstract
The invention relates to a solidification and stabilization system for soil remediation, which comprises a crushing system, a screening system, a drying system, a soil solidification system and a maintenance system which are sequentially arranged from front to back; the crushing system is used for crushing the soil raw material; a first conveying device is arranged between the crushing system and the screening system; the screening system is used for screening the crushed soil raw materials; a second conveying device is arranged between the screening system and the soil curing system; the drying system is arranged on the conveying track of the second conveying device and used for drying the small-particle raw materials; the soil curing system is used for adding a curing and stabilizing agent into the dried soil and uniformly mixing; and a third conveying device is arranged between the soil curing system and the maintenance system. The advantages are that: the structure design is reasonable and compact, the occupied area can be effectively reduced, the whole system is safe and effective, and the heavy metal polluted soil can be continuously treated.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a solidification and stabilization system for soil remediation.
Background
The solidification and stabilization technique is a method of combining heavy metal contaminated soil with a specific binding agent to fix heavy metals in the soil with the agent, so that the heavy metals are in a stable state for a long time and the mobility of the heavy metals is reduced. The method is more generally applied to the rapid control and restoration of the heavy metal contaminated soil, and has remarkable advantages for simultaneously treating various heavy metal combined contaminated soils.
The solidification and stabilization technology is widely used in the process of restoring the heavy metal contaminated soil in China at present due to the advantages of simple operation process, good treatment effect, low price, perfect technical theory and the like.
The factors influencing the curing and stabilizing effects mainly include: physicochemical properties of the contaminated soil, including: the pH value of the soil, the composition of soil substances and the water content; the curing and stabilizing process includes gel material and additive, consumption, water content, homogeneous mixing degree, maintaining condition, etc. The water content of the soil, the uniform mixing degree and the maintenance conditions have great influence on solidification and stabilization, reasonable facility systems are adopted, the solidification and stabilization efficiency can be greatly improved, the leaching rate of heavy metal pollutants is reduced, and the treatment cost is saved.
At present, an internal solidification and stabilization system is mainly used for building a solidification and stabilization workshop, a stirring device and a dosing device are arranged in the workshop, but the stirring efficiency of soil is low due to the fact that the repair earthwork amount of some places is large, too much soil is added in the solidification and stabilization workshop at one time, and the soil and a medicament cannot be fully mixed, so that the solidification and stabilization efficiency is influenced, a large amount of medicament is wasted, and the repair cost is increased.
Because the dosing mixing stirring equipment has strict requirements on the particle size and the water content of the fed materials, large-particle impurities such as concrete blocks, stones, bricks or large-size reinforcing steel bars can cause damage or blockage of a conveying system and rotating parts inside the dosing mixing stirring equipment, and the sticky wet soil with high water content can cause sticking and blockage of the conveying system and the rotating parts inside the dosing mixing stirring equipment, so that the treatment efficiency of the dosing mixing stirring equipment is greatly reduced, and the equipment is even damaged. Therefore, the heavy metal contaminated soil must be subjected to pretreatment processes such as crushing, screening and soil moisture content reduction, and then fed into a dosing mixing and stirring device for curing, stabilizing and repairing treatment.
When the heavy metal contaminated soil is solidified and stabilized, the water content of the soil is required to be about 25%. In some polluted sites, the water content of the excavated soil is over 30% due to shallow underground water level, and if the soil is not dried, the solidification stabilizing system is blocked, and the solidification efficiency of the solidifying agent is reduced.
Disclosure of Invention
The invention aims to provide a solidification and stabilization system for soil remediation, which effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows: a solidification and stabilization system for soil remediation comprises a crushing system, a screening system, a drying system, a soil solidification system and a maintenance system which are sequentially arranged from front to back; the crushing system is used for crushing soil raw materials; a first conveying device is arranged between the crushing system and the screening system and is used for conveying the crushed soil raw materials to the screening system; the screening system is used for screening the crushed soil raw materials to separate the size particles of the crushed soil raw materials; a second conveying device is arranged between the screening system and the soil curing system and is used for conveying the screened small-particle raw materials to the soil curing system; the drying system is arranged on the conveying track of the second conveying device and is used for drying the small-particle raw materials passing through the drying system; the soil curing system is used for adding a curing and stabilizing agent into the dried soil and uniformly mixing; and a third conveying device for conveying the solidified raw materials into the maintenance system for maintenance is arranged between the soil solidification system and the maintenance system.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the crushing system is an integrated digging and breaking crusher, and the integrated digging and breaking crusher is used for collecting soil and crushing the collected soil.
Further, the screening system is a layered vibrating screening machine, the layered vibrating screening machine comprises a screening bin, a vibrating device and a plurality of groups of vibrating springs, the vibrating device is installed on a foundation, the upper end of the vibrating device is a vibrating end and is provided with a horizontal supporting plate, the plurality of groups of vibrating springs are assembled on the upper portion of the supporting plate, the screening bin is assembled on the upper ends of the plurality of groups of vibrating springs, the screening bin is divided into an upper screening chamber and a lower screening chamber which are independent from each other up and down through a screen, the tail end of the upper screening chamber is provided with a large-particle material outlet, the tail end of the lower screening chamber is provided with a small-particle material outlet, the top of the screening bin is provided with a screening machine material collecting port, the first conveying device is used for conveying crushed raw materials into the screening machine material collecting port, and the second conveying device is used for receiving the raw materials output by the small-particle material outlet, and delivering the raw materials to a soil solidification system.
Furthermore, the drying system comprises a drying agent storage chamber and an electric control drying agent spray gun assembly, the drying agent storage chamber is erected above the second conveying device, a powder outlet is formed in the lower end of the drying agent storage chamber, the electric control drying agent spray gun assembly stretches over the second conveying device, is connected and communicated with the powder outlet, and is used for uniformly spraying drying agent on the small-particle raw materials passing through the conveying surface of the second conveying device downwards.
The drying system further comprises a mixing device, the mixing device is arranged behind the drying agent storage chamber, the second conveying device is composed of two sections of belt conveyors, one section of the belt conveyor is arranged between the screening system and the mixing device and passes through the lower part of the electronic control drying agent spray gun assembly and is used for receiving the raw materials output by the small particle raw material outlet and conveying the raw materials into the mixing device, and the other section of the belt conveyor is arranged between the mixing device and the soil solidification system and is used for conveying the raw materials mixed by the mixing device into the soil solidification system.
Further, the mixing device is a horizontal double-screw mixer, two ends of one section of the belt conveyor respectively extend to the lower part of the small particle raw material outlet and the upper part of the feeding hole of the horizontal double-screw mixer, and two ends of the other section of the belt conveyor respectively extend to the lower part of the discharging hole of the horizontal double-screw mixer and the soil curing system.
Further, the soil solidification system comprises a vertical mixing drum, a rotating shaft, a power mechanism, a mixing paddle set, an electric control spray head component and a solidifying agent tank, wherein the vertical mixing drum is fixed on a foundation through a support, a feed inlet is formed in the upper end of the vertical mixing drum, a discharge outlet is formed in the lower end of the vertical mixing drum, the rotating shaft is vertically and rotatably arranged in the middle of the vertical mixing drum, the mixing paddle set is assembled on the rotating shaft, the power mechanism is arranged on the vertical mixing drum and is in transmission connection with the rotating shaft and is used for driving the rotating shaft to rotate around the axial lead of the rotating shaft, the electric control spray head component is arranged on the upper portion inside the vertical mixing drum and is positioned above the mixing paddle set, the spraying direction of the electric control spray head component is downward, the solidifying agent tank is assembled on the side wall of the upper portion of the vertical mixing drum, a liquid outlet of the solidifying agent tank is connected and communicated with the electric control spray head component through a pipeline, and the lower end of the rotating shaft extends into the discharge outlet, and a spiral rotating disk is coaxially assembled on the periphery, and the outer edge of the spiral rotating disk is close to the inner wall of the discharge hole.
The material weighing and detecting system comprises a first water content detector, a second water content detector, a material weighing machine and a controller, wherein the first water content detector and the second water content detector are respectively arranged on the two sections of belt conveyors, the material weighing machine is arranged below an upper conveying belt of a feeding end of one section of belt conveyor and is used for weighing raw materials on the conveying belt passing through the material weighing machine, and the controller is respectively electrically connected with the first water content detector, the second water content detector, the material weighing machine, an electric control drying agent spray gun assembly, a power mechanism and an electric control spray head assembly.
Further, above-mentioned maintenance system includes the maintenance room, and the diapire upper berth in the above-mentioned maintenance room is equipped with the liquid barrier layer.
The invention has the beneficial effects that: the structure design is reasonable and compact, the occupied area can be effectively reduced, the whole system is safe and effective, the heavy metal polluted soil can be continuously treated, and the device is suitable for solidification and stabilization treatment in different field scales.
Drawings
FIG. 1 is a schematic structural view of a solidification stabilization system for soil remediation in accordance with the present invention;
FIG. 2 is a schematic structural diagram of a layered vibrating screen machine in the solidification stabilization system for soil remediation according to the present invention;
FIG. 3 is a schematic structural diagram of a drying system in the solidification stabilization system for soil remediation according to the present invention;
FIG. 4 is a schematic structural diagram of a soil solidification system in the solidification and stabilization system for soil remediation according to the present invention;
fig. 5 is a schematic structural view of a maintenance system in the solidification stabilization system for soil remediation according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a crushing system, 2, a screening system, 3, a drying system, 4, a soil curing system, 5, a maintenance system, 7, a second conveying device, 9, a third conveying device, 21, a screening bin, 22, a vibrating device, 23, a vibrating spring, 24, a supporting plate, 25, a screen, 26, a screening machine material collecting port, 31, a drying agent storage chamber, 32, an electric control drying agent spray gun component, 33, a mixing device, 34, a feeding bin, 35, the device comprises a grinder, 41, a vertical mixing drum, 42, a rotating shaft, 43, a power mechanism, 44, a mixing paddle set, 45, an electric control spray head assembly, 46, a curing agent tank, 51, a curing chamber, 101, a first moisture content detector, 102, a second moisture content detector, 103, a material weighing machine, 211, an upper screening chamber, 212, a lower screening chamber, 421, a spiral rotating disc, 511, a liquid impermeable layer, 531, a material separating plate, 532 and a connecting rod.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example (b): as shown in fig. 1, the solidification and stabilization system for soil remediation of the present embodiment includes a crushing system 1, a screening system 2, a drying system 3, a soil solidification system 4 and a maintenance system 5, which are sequentially arranged from front to back; the crushing system 1 is used for crushing soil raw materials; a first conveying device is arranged between the crushing system 1 and the screening system 2 and is used for conveying the crushed soil raw materials to the screening system 2; the screening system 2 is used for screening the crushed soil raw materials to separate the size particles of the crushed soil raw materials; a second conveying device 7 is arranged between the screening system 2 and the soil solidification system 4, and the second conveying device 7 is used for conveying the screened small-particle raw materials to the soil solidification system 4; the drying system 3 is disposed on the conveying track of the second conveying device 7, and is used for drying the small-particle raw material passing through the drying system; the soil curing system 4 is used for adding a curing and stabilizing agent into the dried soil and uniformly mixing; a third conveying device 9 for conveying the solidified raw materials into the maintenance system 5 for maintenance is arranged between the soil solidification system 4 and the maintenance system 5.
When the device is used, the crushing system 1 crushes soil raw materials, the crushed raw materials are conveyed to the screening system 2 through the first conveying device for screening, the small-particle raw materials obtained through screening are conveyed to the soil curing system 4 through the second conveying device 7, the raw materials are dried in the conveying process, then the curing agent is added into the soil curing system 4 for curing and mixing, and finally the raw materials are conveyed into the curing system 5 for stacking and curing. Drying system 3's setting can effectual control soil raw materials's moisture content, does benefit to soil restoration, and simultaneously, entire system structural design is reasonable, and is compact, can effectively reduce area, and entire system is safe effective, can be continuous handle heavy metal contaminated soil, is applicable to the solidification stabilization of different place scales and handles.
In a preferred embodiment, the crushing system 1 is an integrated digging-breaking crusher for collecting soil and crushing the collected soil, and the first conveying device may be an external mechanical arm or the like, or may be a conveyor belt or the like disposed between a discharge port of the crushing system 1 and a feed port of the sieving system.
As a preferred embodiment, as shown in fig. 2, the screening system 2 is a layered vibration screening machine, which includes a screening chamber 21, a vibration device 22 and a plurality of sets of vibration springs 23, the vibration device 22 is installed on the ground, the upper end of the vibration device 22 is a vibration end, and a horizontal support plate 24 is installed, the plurality of sets of vibration springs 23 are installed on the upper portion of the support plate 24, the screening chamber 21 is installed on the upper end of the plurality of sets of vibration springs 23, the screening chamber 21 is divided into an upper screening chamber 211 and a lower screening chamber 212 which are vertically independent by a screen 25, the upper screening chamber 211 has a large-particle material outlet at the end, the lower screening chamber 212 has a small-particle material outlet at the end, the screening chamber has a material collecting port 26 at the top, the first conveying device is used for conveying the crushed material into the screening material collecting port 26, the second conveying device 7 is used for receiving the raw materials output by the small-particle raw material outlet, conveying the raw materials to the soil solidification system 4, setting the mesh number of the screen 25 according to actual requirements, screening out large-particle raw materials at the large-particle material outlet, recycling the large-particle raw materials to the crushing system 1, and crushing and utilizing the large-particle raw materials again, wherein the small particles are directly used as the raw materials for next operation.
And a conveyor belt is arranged below the large-particle material outlet, and the other end of the conveyor belt extends to a feeding hole (or the upper part) of the crushing system.
As a preferred embodiment, as shown in fig. 3, the drying system 3 includes a desiccant storage chamber 31 and an electrically controlled desiccant spray gun assembly 32, the desiccant storage chamber 31 is erected above the second conveyor 7 and has a powder outlet at the lower end thereof, the electrically controlled desiccant spray gun assembly 32 spans above the second conveyor 7 and is connected and communicated with the powder outlet for uniformly spraying the desiccant on the small-particle raw material passing through the powder outlet on the conveying surface of the second conveyor 7, during the actual use, the desiccant powder is added into the desiccant storage chamber 31, the desiccant storage chamber 31 is connected with the electrically controlled desiccant spray gun assembly 32 (electrically controlled high pressure spray gun), the electrically controlled desiccant spray gun assembly 32 generally has 4 desiccant spray nozzles, 4 desiccant spray nozzles are arranged in parallel and transverse to the conveying surface of the second conveyor 7, the desiccant is uniformly sprayed on the material (in a line shape and across the conveying surface of the second conveying device 7), so that the desiccant and the material are uniformly distributed.
More preferably, set up in the drier locker room 31 top and add feed bin 34, add the lower extreme of feed bin 34 and connect and grind the machine 35, the discharge gate of grinding the machine 35 is connected and is communicated with the top feed inlet of drier locker room 31, the drier gets into through adding feed bin 34 and grinds the machine 35 in, because the drier hydroscopicity is stronger, easy caking, so grind the machine 35 fully to it, avoid the bulk desiccant to pile up and block up the drier locker room 31, ensure good and even spraying of drier.
In a preferred embodiment, the drying system 3 further comprises a mixing device 33, the mixing device 33 is disposed behind the desiccant storage chamber 31, the second conveying device 7 is composed of two belt conveyors, one belt conveyor is disposed between the sieving system 2 and the mixing device 33 and passes through the lower portion of the electrically controlled desiccant spray gun assembly 32 for receiving the raw material outputted from the small granule raw material outlet and conveying the raw material into the mixing device 33, the other belt conveyor is disposed between the mixing device 33 and the soil solidification system 4 for conveying the raw material mixed by the mixing device 33 into the soil solidification system 4, and the mixing device 33 can uniformly mix the raw material and the desiccant after the desiccant is sprayed, so as to achieve a good drying effect, ensure the water content to be uniform.
Optimally, the other section of belt conveyor can be conveyed in an upward inclined mode, the discharge end of the belt conveyor is located at the upper end and is arranged above the feeding port of the soil curing system 4, and the effect of uniformly stirring the curing agent in the soil curing system 4 can be improved by utilizing the gravitational potential energy of the raw materials.
In a preferred embodiment, the mixing device 33 is a horizontal twin-screw mixer, wherein two ends of one belt conveyor extend below the outlet of the small granular raw material and above the inlet of the horizontal twin-screw mixer, and two ends of the other belt conveyor extend below the outlet of the horizontal twin-screw mixer and above the soil solidification system 4, respectively, so that the use is convenient and the mixing effect is good.
As a preferred embodiment, as shown in fig. 4, the soil solidification system 4 includes a vertical mixing drum 41, a rotating shaft 42, a power mechanism 43, a mixing blade set 44, an electrically controlled nozzle assembly 45 and a solidifying agent tank 46, wherein the vertical mixing drum 41 is fixed on the ground through a bracket, the upper end of the vertical mixing drum 41 is provided with a feeding port, the lower end of the vertical mixing drum is provided with a discharging port, the rotating shaft 42 is vertically and rotatably installed at the middle part of the vertical mixing drum 41, the mixing blade set 44 is assembled on the rotating shaft 42, the power mechanism 43 is installed on the vertical mixing drum 41 and is in transmission connection with the rotating shaft 42 for driving the rotating shaft 42 to rotate around the axial lead thereof, the electrically controlled nozzle assembly 45 is arranged at the upper part inside of the vertical mixing drum 41 and above the mixing blade set 44 with the spraying direction downward, the solidifying agent tank 46 is assembled on the upper side wall of the vertical mixing drum 41, its liquid outlet passes through the pipeline and is connected and the intercommunication with above-mentioned automatically controlled shower nozzle subassembly 45, the lower extreme of above-mentioned pivot 42 stretches into in above-mentioned discharge gate, and coaxial spiral rotary disk 421 that is equipped with in the periphery, this spiral rotary disk 421 outer fringe is close to above-mentioned discharge gate inner wall, during the use, power unit 43 drives pivot 4 and stirring paddle group 44 material stirring in to vertical churn 41, and simultaneously, material homogeneous addition in to the section of thick bamboo through automatically controlled shower nozzle subassembly 45 with curing agent jar 46's curing agent, make curing agent homodisperse in soil along with the stirring, its structural design is simple, and is reasonable, and convenient for operation.
The stirring blade group 44 may include at least two groups spaced up and down, and each group is composed of a plurality of horizontal stirring blades and stirring bars disposed on each horizontal stirring blade in an up-down inclined manner.
The power mechanism 43 is a motor, a motor shaft of the motor is connected with a driving wheel, an upper end of the rotating shaft 42 is connected with a driven wheel, and a conveying belt is arranged between the driving wheel and the driven wheel in a surrounding mode.
The electrically controlled nozzle assembly 45 is a commercially available high-pressure nozzle assembly, and an electrically controlled valve is connected to the water inlet and is powered on and connected to a controller, or may be a conventional nozzle, and controls the spraying parameters of the flow meter through a control valve communicated with the curing agent tank 46 through a pipeline.
As a preferred embodiment, as shown in fig. 1, further comprises a material weighing and detecting system, the material weighing and detecting system comprises a first moisture content detector 101, a second moisture content detector 102, a material weighing machine 103 and a controller, the first moisture content detector 101 and the second moisture content detector 102 are provided on the two stages of the belt conveyors, the material weighing machine 103 is arranged below the upper-layer conveyor belt at the feeding end of one section of the belt conveyor, used for weighing the raw materials on the conveyor belt passing through the controller, the controller is respectively electrically connected with the first moisture content detector 101, the second moisture content detector 102, the material weighing machine 103, the electric control drying agent spray gun assembly 32, the power mechanism 43 and the electric control spray head assembly 45, the moisture content of the soil from the screening system can be detected, and the moisture content information is transmitted to the drying system; in the actual repairing process, the quality of the soil directly influences the addition amount of the drying agent, so the amount of the drying agent can be calculated by weighing the soil, wherein, the material weighing machine 103 can transmit the soil quality information to the controller, calculate the optimal feeding ratio (namely the optimal feeding ratio of the drying agent and the curing agent) through a data processing module (program) in the controller, wherein, the controller is used for controlling the water content of the initial raw material according to the water content information of the initial raw material of the soil detected by the first water content detector 101, and the controller controls and adjusts the parameters of the electrically controlled drying agent spray gun assembly 32 (namely, adjusts the added drying agent amount) by combining the weight control of the soil, and then controls and adjusts the curing agent amount to be sprayed by the electrically controlled spray head assembly 45 according to the dried raw material water content information detected by the second water content detector 102 and the initial weight information of the soil, so that the drying agent curing of the soil raw material can be carried out in the optimal state. It should be noted that: soil moisture content not only can influence the transmission effect of soil in transmission process, also can influence the solidification effect of firming agent, and the soil of high moisture content is unfavorable for the conveying of soil, and causes the jam of devices such as stirring easily, can reduce the solidification effect of firming agent simultaneously, consequently, the soil that the moisture content is less than 25% accords with the processing requirement of solidification stabilization relatively. However, the water content of the dredged soil is generally higher than 25%, and therefore it is economically feasible to reduce the water content by adding a desiccant.
The electrically controlled nozzle assembly 45 is a conventional high-pressure nozzle on the market, and an electrically controlled valve is communicated with a water inlet of the nozzle and is electrified and connected with a controller.
As a preferred embodiment, as shown in fig. 5, the curing system 5 comprises a curing chamber 51, a liquid impermeable layer 511 is laid on the inner bottom wall of the curing chamber 51, the curing chamber 51 is used for curing the stacked raw materials, wherein the liquid impermeable layer 511 can effectively prevent the liquid from penetrating into the ground, the curing chamber 51 is environmentally friendly, the upper end of the curing chamber 51 is provided with a raw material inlet, and the third conveying device 9 is used for feeding the cured soil to the raw material inlet.
Preferably, an even distribution device 53 is disposed at the feeding port at the upper end of the curing chamber 51, the even distribution device 53 includes two material distribution plates 531, two ends of the two material distribution plates 531 extend to the side walls close to the two opposite ends of the curing chamber 51, one side of each material distribution plate is close to the other side, and is correspondingly connected with a connecting rod 532 horizontally disposed along the extending direction, the two connecting rods 532 are respectively connected with two rotating mechanisms, the two rotating mechanisms simultaneously drive the corresponding rotating shafts to rotate (the two connecting rods 532 rotate in opposite directions), so as to drive the two material distribution plates 531 to turn upwards to be located on the same horizontal plane and cover the material inlet, or turn downwards to be located vertically and close to each other, so that the material entering through the material inlet can slide to the bottom wall of the curing chamber 51 along the two material distribution plates 531, and the inclination angle can be adjusted along with the continuous rotation of the two material distribution plates 531, so that the raw material can be uniformly spread on the bottom wall of the curing chamber 51.
The following are specifically mentioned: all conveying devices or conveying lines related in the solidification and stabilization system for soil remediation adopt belt conveyors or conveying belts, and the system is convenient to use and simple to arrange.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. A solidification stabilization system for soil remediation, comprising: comprises a crushing system (1), a screening system (2), a drying system (3), a soil curing system (4) and a maintenance system (5) which are arranged from front to back in sequence; the crushing system (1) is used for crushing soil raw materials; a first conveying device is arranged between the crushing system (1) and the screening system (2), and is used for conveying the crushed soil raw materials to the screening system (2); the screening system (2) is used for screening the crushed soil raw materials to separate the size particles of the crushed soil raw materials; a second conveying device (7) is arranged between the screening system (2) and the soil solidification system (4), and the second conveying device (7) is used for conveying the screened small-particle raw materials to the soil solidification system (4); the drying system (3) is arranged on the conveying track of the second conveying device (7) and is used for drying the small-particle raw materials passing through the drying system; the soil curing system (4) is used for adding a curing and stabilizing agent into the dried soil and uniformly mixing; a third conveying device (9) for conveying the solidified raw materials into the maintenance system (5) for maintenance is arranged between the soil solidification system (4) and the maintenance system (5);
the drying system (3) comprises a drying agent storage chamber (31) and an electric control drying agent spray gun assembly (32), the drying agent storage chamber (31) is erected above the second conveying device (7), the lower end of the drying agent storage chamber is provided with a powder outlet, and the electric control drying agent spray gun assembly (32) stretches across the second conveying device (7), is connected with and communicated with the powder outlet and is used for uniformly spraying drying agent to small-particle raw materials on the conveying surface of the second conveying device (7) passing through the electric control drying agent spray gun assembly downwards;
the crushing system (1) is an integrated digging and crushing crusher, and the integrated digging and crushing crusher is used for collecting soil and crushing the collected soil;
the screening system (2) is a layered vibration screening machine which comprises a screening bin (21), a vibration device (22) and a plurality of groups of vibration springs (23), wherein the vibration device (22) is installed on a foundation, the upper end of the vibration device is a vibration end and is provided with a horizontal supporting plate (24), the plurality of groups of vibration springs (23) are assembled on the upper part of the supporting plate (24), the screening bin (21) is assembled on the plurality of groups of upper ends of the vibration springs (23), the screening bin (21) is internally divided into an upper screening chamber (211) and a lower screening chamber (212) through a screen (25), the upper screening chamber (211) is provided with a large-particle material outlet at the tail end, a small-particle material outlet is arranged at the tail end of the lower screening chamber (212), a material collecting port (26) is arranged at the top of the screening bin, a first conveying device is used for conveying crushed raw materials into the material collecting port (26) of the screening machine, the second conveying device (7) is used for receiving the raw materials output by the small-particle raw material outlet and conveying the raw materials to the soil solidification system (4);
the drying system (3) further comprises a mixing device (33), the mixing device (33) is arranged behind the desiccant storage chamber (31), the second conveying device (7) is composed of two sections of belt conveyors, one section of the belt conveyor is arranged between the screening system (2) and the mixing device (33), passes through the lower part of the electronic control desiccant spray gun assembly (32), is used for receiving the raw materials output by the small particle raw material outlet and conveying the raw materials into the mixing device (33), and the other section of the belt conveyor is arranged between the mixing device (33) and the soil solidification system (4), and is used for conveying the raw materials mixed by the mixing device (33) into the soil solidification system (4);
the mixing device (33) is a horizontal double-screw mixer, two ends of one section of the belt conveyor respectively extend to the lower part of the small particle raw material outlet and the upper part of the feed inlet of the horizontal double-screw mixer, and two ends of the other section of the belt conveyor respectively extend to the lower part of the discharge outlet of the horizontal double-screw mixer and the soil curing system (4);
the soil solidification system (4) comprises a vertical mixing drum (41), a rotating shaft (42), a power mechanism (43), a mixing paddle group (44), an electric control spray head component (45) and a curing agent tank (46), wherein the vertical mixing drum (41) is fixed on a foundation through a support, a feed inlet is formed in the upper end of the vertical mixing drum, a discharge outlet is formed in the lower end of the vertical mixing drum, the rotating shaft (42) is vertically and rotatably arranged in the middle of the vertical mixing drum (41), the mixing paddle group (44) is assembled on the rotating shaft (42), the power mechanism (43) is arranged on the vertical mixing drum (41) and is in transmission connection with the rotating shaft (42) for driving the rotating shaft (42) to rotate around the axial lead of the rotating shaft, the electric control spray head component (45) is arranged on the upper part inside the vertical mixing drum (41) and is positioned above the mixing paddle group (44), and the spraying direction of the electric control spray head component is downward, the curing agent tank (46) is assembled on the side wall of the upper part of the vertical stirring cylinder (41), the liquid outlet of the curing agent tank is connected and communicated with the electric control spray head component (45) through a pipeline, the lower end of the rotating shaft (42) extends into the discharge port, a spiral rotating disc (421) is coaxially assembled on the periphery of the rotating shaft, and the outer edge of the spiral rotating disc (421) is close to the inner wall of the discharge port;
the material weighing and detecting system comprises a first moisture content detector (101), a second moisture content detector (102), a material weighing machine (103) and a controller, wherein the first moisture content detector (101) and the second moisture content detector (102) are respectively arranged on the two sections of belt conveyors, the material weighing machine (103) is arranged below an upper conveying belt at the feeding end of one section of the belt conveyor and used for weighing raw materials on the conveying belt passing through the material weighing machine, and the controller is respectively electrically connected with the first moisture content detector (101), the second moisture content detector (102), the material weighing machine (103), an electric control drying agent spray gun assembly (32), a power mechanism (43) and an electric control spray head assembly (45).
2. A solidification stabilization system for soil remediation, according to claim 1, wherein: the maintenance system (5) comprises a maintenance room (51), and a liquid impervious layer (511) is laid on the inner bottom wall of the maintenance room (51).
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| CN112642328A (en) * | 2020-09-21 | 2021-04-13 | 广西净雨环保科技有限公司 | Dispensing equipment of brick surface course material permeates water |
| CN112604571A (en) * | 2020-11-06 | 2021-04-06 | 中铁第五勘察设计院集团有限公司 | Movable improved soil preparation device |
| CN113307535A (en) * | 2021-06-18 | 2021-08-27 | 江苏建筑职业技术学院 | Soil curing agent |
| CN115197816B (en) * | 2022-07-07 | 2023-08-04 | 南京林业大学 | Sample pretreatment device for soil microorganism detection |
| CN115647014B (en) * | 2022-11-15 | 2023-08-18 | 水利部牧区水利科学研究所 | Soil remediation device for improving vegetation |
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