Efficient graded leaching integrated device for polluted soil

Abstract

The utility model provides an efficient grading leaching integrated device aiming at polluted soil, which comprises a main shell and an upper shell, the upper shell is arranged above the main shell, the top of the upper shell is provided with a feed port, the lower end part of the upper shell is communicated with the interior of the main shell, the interior of the upper shell is provided with a screening and crushing structure, and the screening and crushing structure is arranged in the upper shell. A plurality of spraying openings are formed in the inner top face of the main shell and connected with a medicament conveying pipeline, the medicament conveying pipeline is arranged on the outer top face of the main shell, a first-stage leaching chamber, a second-stage leaching chamber and a slurry collecting chamber are sequentially arranged in the main shell from top to bottom in a layered mode, and the first-stage leaching chamber communicates with the second-stage leaching chamber through a first screen. The second-stage leaching chamber is communicated with the slurry collecting chamber through a second screen, and the aperture of the first screen is larger than that of the second screen.

Description

TECHNICAL FIELD

[0001] The utility model relates to soil remediation equipment technical field, especially in view and a kind of efficient grading leaching integrated device for contaminated soil. BACKGROUND

[0002] Soil leaching technology refers to the chemical solvent that can promote soil pollutants to be injected into contaminated soil, so that the pollutants are dissolved, separated from soil and treated. The removal principle mainly includes two kinds, one is to combine the pollutants with leaching liquid, and through possible desorption, chelation, dissolution and other chemical reactions, so that the pollution is removed from soil and transferred to leaching liquid. The second is to use leaching agent to wash away the pollutants in soil. The working process of soil leaching equipment mainly includes contaminated soil pretreatment, screening, leaching, solid-liquid separation and other modules.

[0003] Soil leaching method can treat heavy metals, organic matter, cyanide, petroleum and its cracking products, semi-volatile organic compounds and pesticides and other pollutants, and has the advantages of wide application range and simple operation process. This is also the reason why this technology is widely used in engineering. Related research shows that most of the pollutants in soil have strong binding ability with small particle size clay soil, and the binding ability of pollutants with large particle size sandy soil is weak, which is easy to remove by leaching. In practical application, contaminated soil is usually pretreated and then soaked and leached in the leaching module, without fully considering the binding rule of pollutants and soil particle size, which affects the leaching efficiency. At the same time, the soaking method requires a large amount of leaching agent, and produces a large amount of contaminated slurry at the back end, increasing the treatment cost. The existing grading leaching device has poor integrity, and the soil is easy to cause pipeline blockage and soil scattering during transmission after grading.

[0004] In view of the problems of existing soil leaching equipment, such as complex structure, large occupation area, low equipment efficiency, large amount of contaminated slurry output and low integration of grading system, a multi-stage leaching and efficient remediation soil leaching equipment is needed. UTILITY MODEL CONTENT

[0005] The utility model discloses in order to solve above-mentioned problem, purpose is in providing a kind of efficient grading leaching integrated device for contaminated soil.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a kind of efficient grading leaching integrated device for contaminated soil, it is characterized in that, including: main casing and upper casing, upper casing is set in the upper of main casing, the top of upper casing is provided with feed inlet, the lower end of upper casing is communicated with the inside of main casing, the inside of upper casing is provided with screening and crushing structure, the inside top surface of main casing is provided with multiple spray ports, spray port connects reagent delivery pipeline, reagent delivery pipeline is set on the outside top surface of main casing, the inside of main casing is sequentially layered from top to bottom and is provided with first stage leaching chamber, secondary leaching chamber, slurry collection chamber, first stage leaching chamber and secondary leaching chamber are communicated by first screen cloth, secondary leaching chamber and slurry collection chamber are communicated by second screen cloth, the aperture of first screen cloth is greater than the aperture of second screen cloth.

[0008] Further, in the efficient grading leaching integrated device for contaminated soil provided by the utility model, the screening and crushing structure can further have the following features: the screening and crushing structure includes two layers, each layer is provided with three parallel distributed crushing shafts, and the surface of the crushing shafts is distributed with crushing teeth.

[0009] Further, in the efficient grading leaching integrated device for contaminated soil provided by the utility model, the spray ports can further have the following features: there are eight spray ports in total, which are arranged in two rows, and each row is provided with four spray ports.

[0010] Further, in the efficient grading leaching integrated device for contaminated soil provided by the utility model, the first stage leaching chamber and the secondary leaching chamber can further have the following features: a spiral auger is arranged in each of the first stage leaching chamber and the secondary leaching chamber.

[0011] Further, in the efficient grading leaching integrated device for contaminated soil provided by the utility model, the first screen cloth can further have the following features: the first screen cloth is an inclined vibrating screen, the screen aperture is 7.5 mm, the inclination angle is 8 degrees, and the first stage leaching chamber is provided with a soil discharge outlet.

[0012] Further, in the efficient grading leaching integrated device for contaminated soil provided by the utility model, the second screen cloth can further have the following features: the second screen cloth is an inclined vibrating screen, the screen aperture is 2 mm, the inclination angle is 8 degrees, and the secondary leaching chamber is provided with a soil discharge outlet.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The efficient grading and leaching integrated device for the contaminated soil is provided with a crushing and screening chamber, a reagent spraying system, a first leaching chamber, a second leaching chamber and a slurry collecting chamber. After the soil enters the device, crushing and screening are firstly performed in the crushing and screening chamber, then two-stage leaching is performed, the contaminated soil is classified by particle size, the non-contaminated large-particle-size soil is effectively separated, and the leaching efficiency is improved. The top overall leaching mode of the device can make the small-particle-size soil in the first leaching chamber and the small-particle-size soil attached to the large-particle-size soil be washed down, enter the second leaching chamber under the action of gravity, and finally enter the slurry collecting chamber through particle size separation. Meanwhile, the top overall leaching mode can make the contaminated soil and the reagent fully contact, reduce the reagent consumption and the amount of contaminated sludge, and reduce subsequent disposal work. In addition, the device is an integrated leaching device, is convenient to install and debug, has low requirements on the site space, and can be quickly deployed in a soil remediation project. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structure schematic view of the efficient grading and leaching integrated device for the contaminated soil in the embodiment of the utility model;

[0016] Figure 2 is a structure schematic view of three crushing shafts in the embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the technical scheme of the utility model is specifically described in the following embodiments in combination with the drawings.

[0018] Referring to Figure 1 The embodiment provides a kind of efficient grading and leaching integrated device for the contaminated soil, the shell of the device includes main shell 2 and upper shell 1, shell internal space is arranged from top to bottom successively with crushing and screening chamber, first leaching chamber, second leaching chamber, slurry collecting chamber.

[0019] Upper shell 1 is arranged at the top of main shell 2. The top of upper shell 1 is provided with feed inlet 3. The lower end of upper shell 1 is communicated with the inside of main shell 2. The inside of upper shell 1 is provided with screening and crushing structure 4. The inside of upper shell 1 is regarded as crushing and screening chamber.

[0020] Screening and crushing structure 4 includes two layers, each layer is provided with three parallel distribution crushing shafts 4a, and the surface of crushing shaft is provided with crushing teeth 4b. The structure of three crushing shafts of single layer is as shown in Figure 2As shown, the crushing shaft 4a and the crushing teeth 4b are integrated, the crushing shaft 4a is driven to rotate by a motor (not shown in the figure), and the connection mode is the shaft and motor connection mode of the prior art. The crushing teeth 4b are driven to rotate by the crushing shaft 4a to crush the entering material. In specific implementation cases, the shaft spacing of each row of adjacent shafts can be adjusted according to requirements to obtain soil crushing particles of different requirements. In addition, since the screening and crushing structure 4 is two layers, the lower structure can further crush the material, so that the soil particle size is more uniform, and the subsequent soil and the agent are more fully contacted.

[0021] The internal top surface of the main shell 2 is provided with a plurality of spray openings 6, the spray openings 6 are connected to the agent conveying pipeline 5, the agent conveying pipeline 5 is arranged on the external top surface of the main shell 2, and the agent conveying pipeline 5 is connected to an external agent storage device (not shown in the figure). The agent storage device is provided with a leaching agent, and the leaching agent is selected according to the actual situation of the pollutants. The spray openings 6 and the agent conveying pipeline 5 constitute the agent spraying system of the device. There are eight spray openings 6, which are arranged in two rows, and each row has four spray openings. After the crushed soil particles enter the main shell, the leaching agent is sprayed out of the spray openings in the form of mist droplets, fully contacts the soil particles, and realizes the repair reaction.

[0022] The internal top surface of the main shell 2 is provided with a plurality of spray openings 6, the spray openings 6 are connected to the agent conveying pipeline 5, the agent conveying pipeline 5 is arranged on the external top surface of the main shell 2, and the agent conveying pipeline 5 is connected to an external agent storage device (not shown in the figure). The agent storage device is provided with a leaching agent, and the leaching agent is selected according to the actual situation of the pollutants. The spray openings 6 and the agent conveying pipeline 5 constitute the agent spraying system of the device. There are eight spray openings 6, which are arranged in two rows, and each row has four spray openings. After the crushed soil particles enter the main shell, the leaching agent is sprayed out of the spray openings in the form of mist droplets, fully contacts the soil particles, and realizes the repair reaction.

[0023] The first screen 8 at the bottom of the primary leaching chamber is an inclined vibrating screen, the screen aperture is 7.5 mm, and the inclination angle is 8 degrees, which is convenient for the soil to advance under the action of gravity. The primary leaching chamber is provided with a soil discharge port 9 at the low side of the height of the first screen 8. A spiral auger 7 is arranged in the primary leaching chamber, the spiral auger 7 is driven by a motor 16, and the soil mainly advances by the rotation of the auger. The soil is contacted and reacted with the leaching agent during the advancing process. The small-particle-size soil after leaching enters the secondary leaching chamber through the first screen 8. The large-particle-size soil is discharged through the soil discharge port 9. Preferably, a transmission belt can also be arranged at the rear end of the soil discharge port 9 to automatically convey the discharged soil.

[0024] The second screen 14 at the bottom of the secondary leaching chamber is an inclined vibrating screen with a screen aperture of 2 mm and an inclination angle of 8 degrees, facilitating the advancement of the soil under the action of gravity. The secondary leaching chamber is provided with a soil discharge outlet 11 at the lower side of the second screen 14. The secondary leaching chamber is provided with a screw auger 10 driven by a motor 17, and the soil mainly advances by the rotation of the auger. After being treated by the primary leaching chamber, the soil has a water content greatly increased, usually more than 85%, and the soil is further leached in the secondary leaching chamber to further concentrate the pollutants into leaching slurry. After leaching, the slurry enters the slurry collecting chamber through the second screen 14. The small-diameter soil is discharged through the soil discharge outlet 11. Preferably, a conveyor belt can also be arranged at the rear end of the soil discharge outlet 11 to automatically transport the discharged soil.

[0025] The bottom surface of the slurry collecting chamber is an inclined bottom plate with an inclination of 8 degrees, and the contaminated slurry can slide to the rear side under the action of gravity. The rear side of the slurry collecting chamber is provided with a slurry discharge port 13, and the slurry is discharged through the slurry discharge port, and the discharged sludge is disposed as hazardous waste.

[0026] The above embodiments are only preferred embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application is included in the protection scope of the present application.

Claims

1. A highly efficient integrated staged leaching device for contaminated soil, characterized in that, include: Main shell and upper shell, The upper housing is disposed above the main housing, and a feed inlet is provided at the top of the upper housing. The lower end of the upper housing communicates with the interior of the main housing. The upper shell is equipped with a screening and crushing structure inside. The main housing has multiple spray nozzles on its inner top surface, which are connected to a drug delivery pipe. The drug delivery pipe is located on the outer top surface of the main housing. The interior of the main shell is arranged in layers from top to bottom, including a primary rinsing chamber, a secondary rinsing chamber, and a mud collection chamber. The primary rinsing chamber and the secondary rinsing chamber are connected by a first screen, and the secondary rinsing chamber and the mud collection chamber are connected by a second screen. The aperture of the first screen is larger than that of the second screen.

2. The high-efficiency graded leaching integrated device for contaminated soil as described in claim 1, characterized in that: in, The screening and crushing structure includes upper and lower layers, each layer having three parallel crushing shafts, the surface of which is covered with crushing teeth.

3. The high-efficiency graded leaching integrated device for contaminated soil as described in claim 1, characterized in that: in, There are eight spray nozzles in total, arranged in two rows, with four nozzles in each row.

4. The high-efficiency graded leaching integrated device for contaminated soil as described in claim 1, characterized in that: in, Both the primary shower chamber and the secondary shower chamber are equipped with augers.

5. The high-efficiency graded leaching integrated device for contaminated soil as described in claim 1, characterized in that: in, The first screen is an inclined vibrating screen with a screen aperture of 7.5 mm and an inclination angle of 8 degrees. The primary washing chamber is equipped with a soil discharge outlet.

6. The high-efficiency graded leaching integrated device for contaminated soil as described in claim 1, characterized in that: in, The second screen is an inclined vibrating screen with a screen aperture of 2mm and an inclination angle of 8 degrees. The secondary washing chamber is equipped with a soil discharge outlet.

7. The high-efficiency graded leaching integrated device for contaminated soil as described in claim 1, characterized in that: in, The second screen is an inclined vibrating screen with a screen aperture of 2mm and an inclination angle of 8 degrees. The secondary washing chamber is equipped with a soil discharge outlet.

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