CN210632628U

CN210632628U - Soil pollution treatment device

Info

Publication number: CN210632628U
Application number: CN201921359466.5U
Authority: CN
Inventors: 李小方
Original assignee: Institute of Genetics and Developmental Biology of CAS
Current assignee: Institute of Genetics and Developmental Biology of CAS
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-05-29
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a soil pollution treatment device, which comprises a leaching tank, a connecting pipe and an adsorption tank, wherein the bottom of the leaching tank is provided with a first liquid discharge port, the bottom of the adsorption tank is provided with a liquid inlet, the first liquid discharge port is connected with the liquid inlet through the connecting pipe, and one end of the connecting pipe, which is close to the liquid inlet, is provided with a delivery pump; the top of the leaching tank is provided with a soil inlet and an eluent inlet, one or more screens with different apertures are arranged in the leaching tank, and an air stirring pipe is arranged on the upper part of the screen in the leaching tank and used for blowing air to fully mix the soil and the eluent; the adsorption tank is filled with filler, and is provided with a second liquid outlet for discharging clarified liquid. This soil pollution processing apparatus can carry out effectual processing with the pollutant in the soil, separates out the soil that the pollutant is up to standard.

Description

Soil pollution treatment device

Technical Field

The utility model belongs to the technical field of soil pollution processing apparatus, concretely relates to soil pollution processing apparatus.

Background

When the harmful substances in the soil are excessive and exceed the self-cleaning capacity of the soil, the composition, structure and function of the soil are changed, the microbial activity is inhibited, the harmful substances or decomposition products thereof are gradually accumulated in the soil and are indirectly absorbed by the human body through the soil, plants and the human body or through the soil, water and the human body, so that the degree of harming the health of the human body is reached, and the soil pollution is the soil pollution.

At present, the overall situation of soil pollution in China is severe, soil pollution in parts of regions is severe, and soil heavily polluted regions and high-risk regions appear in heavily polluted enterprises or industrial intensive regions, industrial and mining areas and peripheral regions, cities and suburbs. The soil pollution types are various, and the situation of coexistence of new and old pollutants and inorganic and organic composite pollution is presented. The soil pollution has multiple ways, complex reasons and great control difficulty. The soil environment supervision and management system is not sound, the prevention and treatment investment of soil pollution is insufficient, and the prevention and treatment consciousness of the whole society is not strong. The quality safety problem of agricultural products and the mass events caused by soil pollution increase year by year, and become important factors influencing the health and social stability of the masses.

The soil pollution causes are various, the pollutants comprise organic pollutants which are difficult to decompose and also comprise heavy metals such as cadmium, copper, lead, zinc and the like, the pollutants are used as the most efficient and thorough remediation method, and leaching is one of the most main soil pollution treatment methods. The existing soil pollution treatment equipment usually completes the mixing of water or an eluting agent and soil by a spraying method, and the soil and the eluting agent are usually not uniformly mixed in the process, so that pollutants in the soil cannot be thoroughly eluted. In addition, a significant drawback of this method is the dependence on continuous feed and continuous subsequent collection and storage of the effluent, which increases the secondary cost of soil treatment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a soil pollution processing apparatus, this soil pollution processing apparatus can carry out effectual processing with the pollutant in the soil, separates out the soil that the pollutant is up to standard.

The utility model discloses a realize through following technical scheme: a soil pollution treatment device comprises a leaching tank, a connecting pipe and an adsorption tank, wherein a first liquid discharge port is formed in the bottom of the leaching tank, a liquid inlet is formed in the bottom of the adsorption tank, the first liquid discharge port and the liquid inlet are connected through the connecting pipe, the connecting pipe is provided with an upward bent part, and a conveying pump is arranged at one end, close to the liquid inlet, of the connecting pipe;

the top of the leaching tank is provided with a soil inlet and a leaching agent inlet, a screen is arranged in the leaching tank along the height direction, at least one screen is arranged, the apertures of the screens are sequentially reduced from top to bottom, an air stirring pipe is arranged on the upper part of the screen in the leaching tank, and an air inlet is formed in the air stirring pipe;

the adsorption tank is filled with filler, the filler adsorbs soil pollutants in the leaching agent, and a second liquid discharge port is formed in the adsorption tank and used for discharging clarified liquid.

In the above technical solution, the air inlet is connected to the blower.

In the technical scheme, a partition plate is arranged in the adsorption tank, a liquid outlet hole is formed in the partition plate, and a filler is arranged on the upper portion of the partition plate.

In the technical scheme, the filler is a mixture of lime and biochar, and the particle size of the filler is 16-20 meshes.

In the above technical scheme, a liquid distributor is arranged above the liquid outlet hole, the liquid distributor is cylindrical, the diameter of the liquid distributor is larger than the aperture of the liquid outlet hole, the top of the liquid distributor is a steel plate, a water outlet gap is arranged on the cylinder of the liquid distributor, and the water outlet gap is smaller than the particle size of the filler.

In the technical scheme, the liquid outlet holes are uniformly formed in the partition plate, so that the mixed liquid of the soil and the eluting agent can be uniformly dispersed and ascended.

In the technical scheme, the lower edge of the steel plate of the liquid distributor is provided with the steel bar supports, gaps among the steel bar supports are equal, the steel bar supports are fixedly connected with the stainless steel square bars along the circumferential direction of the cylinder of the liquid distributor, and the gaps among the adjacent stainless steel square bars are 22-26 meshes.

In the technical scheme, the air stirring pipe comprises an annular pipe and a cross pipe, the annular pipe is coaxially arranged in the shower tank, the center of the annular pipe is connected with the cross pipe, four connectors of the cross pipe are communicated with the annular pipe, and the center of the cross pipe is connected with the air inlet.

In the above technical scheme, the bottom of the air stirring pipe is provided with an air outlet, and the aperture of the air outlet on the cross pipe is smaller than that of the air outlet on the annular pipe.

In the technical scheme, the height of the bending part of the connecting pipe is not lower than that of the lowest screen of the leaching tank.

The utility model discloses an advantage and beneficial effect do: in polluted soil, pollutants adsorbed in large-particle-size soil with high content are less, harmful substances in the polluted soil are often adsorbed in small particles with the particle size of less than 0.2mm, the large-particle-size soil with low content of the pollutants can be removed in advance by screening the soil step by step, the part of soil can be directly abandoned or buried according to harmless solid wastes, the amount of materials entering subsequent treatment can be greatly reduced, and the reduction of the pollutants is realized. Contain less granule in the mixed solution of misce bene and get into the bottom of drenching and washing jar, the rethread adsorption tank carries out further absorption to remaining pollutant in the mixed solution and purifies, and the liquid distributor in the adsorption tank can make the filler on the entering upper strata of mixed solution dispersion, makes the harmful substance in the mixed solution can be abundant even by the absorption purification. The utility model discloses a put in the eluting agent in the leaching tank, the structure that air agitation pipe adopted annular pipe and cross union coupling, can be abundant and even to the gas of blowing out in the leaching tank, make soil and eluting agent intensive mixing. The device has the advantages of simple structure, easy operation, low cost, and adoption of an environment-friendly pollution-free mode for treating soil, can make the eluting agent fully contact with the soil, and has good soil eluting treatment effect and high efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of an air agitation pipe;

FIG. 3 is a schematic view of the structure of the partition plate and the cylindrical liquid distributor;

FIG. 4 is a diagram illustrating a fourth embodiment.

Wherein:

1: soil import, 2: eluent inlet, 3: air stirring pipe, 3-1: air inlet, 4: a shower tank, 4-1: first drain port, 5: screen mesh, 5-1: support sheet, 6: connecting pipe, 7: delivery pump, 8: adsorption tank, 8-1: liquid inlet, 9: separator, 9-1: liquid outlet hole, 9-2: liquid distributor, 9-3: stainless steel square bars, 9-4: second drain port, 10-1: pull rod, 10-2: fastener, 10-3: sleeve, 10-4: drive mechanism, 10-5: drive rod, 10-6: and (7) connecting the disc.

For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.

Detailed Description

In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.

Example one

A soil pollution treatment device comprises a leaching tank 4, a connecting pipe 6 and an adsorption tank 8, wherein a first liquid discharge port 4-1 is formed in the bottom of the leaching tank 4, a liquid inlet 8-1 is formed in the bottom of the adsorption tank 8, the first liquid discharge port 4-1 is connected with the liquid inlet 8-1 through the connecting pipe 6, the connecting pipe 6 is provided with an upward bent part, and a conveying pump 7 is arranged at one end, close to the liquid inlet 8-1, of the connecting pipe 6;

the top of the leaching tank 4 is provided with a soil inlet 1 and a leaching agent inlet 2, two layers of screens 5 with different apertures are arranged in the leaching tank 4, the aperture of the upper layer of screen 5 is 10-16 meshes, so that particles with the particle size of more than 1mm can be screened out, the aperture of the lower layer of screen 5 is 30-60 meshes, so that particles with the particle size of 0.2-0.5 mm can be screened out, an air stirring pipe 3 is arranged at the upper part of the screen 5 in the leaching tank 4, an air inlet 3-1 is arranged on the air stirring pipe 3, and the air stirring pipe 3 is used for blowing air into the leaching tank 4 to fully mix soil and the leaching agent; in polluted soil, pollutants adsorbed in large-particle-size soil with higher content are less, harmful substances in the polluted soil are often adsorbed in small particles with the particle size of less than 0.2mm, the large particle size with lower content of the pollutants can be removed in advance by screening the soil step by step, the part of large-particle-size soil can be directly abandoned or buried according to harmless solid wastes, the amount of materials entering subsequent treatment can be greatly reduced, and the reduction of the pollutants is realized.

The adsorption tank 8 is filled with filler, the filler adsorbs soil pollutants in the leaching agent and discharges the treated clarified liquid, the top of the adsorption tank 8 is provided with a second liquid discharge port 9-4, and the second liquid discharge port 9-4 is used for discharging the clarified liquid.

Preferably, the air inlet 3-1 is connected with a blower.

During the use, soil gets into from soil import 1, and the eluent gets into from eluent import 2, and air-blower is connected to air stirring pipe 3, and the air-blower makes the better mixture of soil and eluent, reinforcing mass transfer to air stirring pipe 3 interior blast air, the gas that air stirring pipe 3 bloated. After the mixed liquid is screened step by the multilayer screen 5, large-particle-size substances with lower pollutant content in the soil can be removed in advance, so that small-particle-size substances in the soil are left, and the small-particle-size substances flow into a connecting pipe 6 through a first liquid discharge port 4-1 at the bottom of a leaching tank 4, wherein the connecting pipe 6 is

And solid particles in the mixed liquid can be further settled, so that the mixed liquid entering the adsorption tank 8 is clearer, and enters the adsorption tank 8 from a liquid inlet 8-1 at the bottom of the adsorption tank 8 under the action of the delivery pump 7. If the device is applied in a laboratory, the delivery pump 7 can be a peristaltic pump with small volume, good stability and high precision; if the device is applied to actual production, the conveying pump 7 can be a slurry pump. The filler in the adsorption tank 8 purifies harmful substances in the mixed solution, and then the harmful substances are discharged through a second liquid outlet 9-4 at the top of the adsorption tank 8 to be treated next step.

Example two

The embodiment is further optimized on the basis of the first embodiment.

Preferably, a partition plate 9 is arranged in the adsorption tank 8, a liquid outlet hole 9-1 is formed in the partition plate 9, and a filler is arranged at the upper part of the partition plate 9.

Preferably, the filler is a mixture of lime and biochar, and the particle size of the filler is 16-20 meshes. The biochar is arranged on the upper portion of the partition plate, the lime is arranged on the upper portion of the biochar, a layer of cotton wool can be arranged on the upper portion of the lime, the lime is prevented from being dispersed by water in the eluting agent, or the lime and the cotton wool are mixed and placed on the upper portion of the biochar, and the same purpose can be achieved. The leacheate adsorbed by the biochar and the lime, pollutants (particularly heavy metals) and solid particles are adsorbed by the biochar and the lime, and the obtained clarified liquid can return to the eluent preparation process for recycling, so that the raw material utilization rate is improved, and the production cost is reduced.

Preferably, a liquid distributor 9-2 is arranged above the liquid outlet hole 9-1, the liquid distributor 9-2 is cylindrical, the diameter of the liquid distributor 9-2 is larger than the aperture of the liquid outlet hole 9-1, the top of the liquid distributor 9-2 is a steel plate, and the water outlet gap on the cylinder of the liquid distributor 9-2 is smaller than the particle size of the filler.

Preferably, the liquid outlet holes 9-1 are uniformly formed in the partition plate 9 so that the mixture of the soil and the eluting agent can be uniformly dispersed and raised.

Preferably, the lower peripheral edge of the steel plate of the liquid distributor 9-2 is provided with steel bar supports, gaps among the steel bar supports are equal, the steel bar supports are fixedly connected with stainless steel square bars 9-3 along the circumferential direction of the cylinder of the liquid distributor, and the gaps among the adjacent stainless steel square bars 9-3 are 22-26 meshes.

When the device is used, the mixed solution of the soil and the eluting agent enters the bottom of the adsorption tank 8 under the action of the delivery pump 7, then uniformly enters the filler of the partition plate 9 last time through the water outlet gap on the barrel body of the liquid distributor 9-2, after the mixed solution of the soil and the eluting agent is fully contacted with the filler, harmful substances in the solution are adsorbed by the filler, and then the mixed solution is discharged through the second liquid outlet of the adsorption tank 8 to enter the next step.

EXAMPLE III

The embodiment is further optimized on the basis of the embodiment.

Referring to fig. 2, as a preferable mode, the air stirring pipe 3 includes an annular pipe and a cross pipe, the annular pipe is coaxially disposed in the shower tank 4, the center of the annular pipe is connected with the cross pipe, four ports of the cross pipe are communicated with the annular pipe, and the center of the cross pipe is connected with the air inlet 3-1.

Preferably, the bottom of the air stirring pipe 3 is provided with an air outlet, and the aperture of the air outlet on the cross pipe is smaller than that of the air outlet on the annular pipe. Because the cross pipe is closer to the air inlet 3-1 than the annular pipe, the static pressure head of the air on the annular pipe is often lower than that of the cross pipe, the aperture of the air outlet hole on the cross pipe is smaller than that of the air outlet hole on the annular pipe, so that the air flow blown out by the annular pipe and the cross pipe is close, the air is distributed in the leaching tank 4 more uniformly, and the soil and the leaching agent can be better mixed.

Preferably, the height of the curved portion of the connection pipe 6 is not lower than the height of the mesh of the lowermost layer in the shower tank 4.

Example four

The embodiment is further optimized on the basis of the embodiment.

As a preferable mode, a supporting sheet 5-1 is arranged on the side wall of the leaching tank 4, a plurality of layers of the screen 5 are arranged on the supporting sheet 5-1, the screen 5 is supported by the supporting sheet 5-1, a plurality of pull rods 10-1 penetrate through the plurality of layers of the screen 5, a sleeve 10-3 is sleeved outside each pull rod 10-1 between the screen 5, the sleeve 10-3 is used for positioning the screen 5, the screen 5 and the sleeve 10-3 are fixedly arranged through a fastener 10-2, the top ends of the pull rods 10-1 are connected through a connecting disc 10-6, a driving rod 10-5 is arranged in the center of the connecting disc 10-6, the top end of the driving rod 10-5 is connected with a driving mechanism 10-4, and the driving mechanism 10-4 is arranged at the top of the leaching tank 4, the driving mechanism 10-4 drives the screen 5 to reciprocate through the pull rod 10-1. The driving mechanism 10-4 may be an electric cylinder or an air cylinder, and the action end of the electric cylinder or the air cylinder is arranged along the vertical direction. This structure can accelerate soil and eluent mixed liquid to pass through screen cloth 5, and when the mesh was blockked up to the particulate matter on screen cloth 5, can remove the particulate matter through the mode of vibration simultaneously.

Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.

Claims

1. A soil pollution processing apparatus which characterized in that: the device comprises a spray washing tank (4), a connecting pipe (6) and an adsorption tank (8), wherein a first liquid discharge port (4-1) is formed in the bottom of the spray washing tank (4), a liquid inlet (8-1) is formed in the bottom of the adsorption tank (8), the first liquid discharge port (4-1) is connected with the liquid inlet (8-1) through the connecting pipe (6), the connecting pipe (6) is provided with an upward bent part, and a conveying pump (7) is arranged at one end, close to the liquid inlet (8-1), of the connecting pipe (6);

the top of the leaching tank (4) is provided with a soil inlet (1) and a leaching agent inlet (2), a screen (5) is arranged in the leaching tank (4) along the height direction, the number of the screen (5) is not less than one, the apertures of the screen (5) are sequentially reduced from top to bottom, an air stirring pipe (3) is arranged on the upper part of the screen (5) in the leaching tank (4), and an air inlet (3-1) is formed in the air stirring pipe (3);

the adsorption tank (8) is filled with filler, the filler adsorbs soil pollutants in the leaching agent, a second liquid discharge port (9-4) is formed in the adsorption tank (8), and the second liquid discharge port (9-4) is used for discharging clarified liquid.

2. A soil contamination treatment apparatus according to claim 1, wherein: the air inlet (3-1) is connected with a blower.

3. A soil contamination treatment apparatus according to claim 1, wherein: a partition plate (9) is arranged in the adsorption tank (8), a liquid outlet hole (9-1) is formed in the partition plate (9), and the filler is arranged on the upper portion of the partition plate (9).

4. A soil contamination treatment apparatus according to claim 3, wherein: the filler is a mixture of lime and biochar, and the particle size of the filler is 16-20 meshes.

5. A soil contamination treatment apparatus according to claim 3, wherein: a liquid distributor (9-2) is arranged above the liquid outlet hole (9-1), the liquid distributor (9-2) is cylindrical, the diameter of the liquid distributor (9-2) is larger than the aperture of the liquid outlet hole (9-1), the top of the liquid distributor (9-2) is a steel plate, a water outlet gap is arranged on the side wall of the barrel body of the liquid distributor (9-2), and the water outlet gap is smaller than the particle size of the filler.

6. A soil contamination treatment apparatus according to claim 3, wherein: the liquid outlet holes (9-1) are uniformly arranged on the partition plate (9).

7. A soil pollution treatment device according to claim 5, wherein: the steel bar support is arranged on the edge of the lower periphery of a steel plate of the liquid distributor (9-2), gaps among the steel bar supports are equal, stainless steel square bars (9-3) are fixedly connected to the steel bar supports along the circumferential direction of a cylinder of the liquid distributor (9-2), and the gaps among the adjacent stainless steel square bars (9-3) are 22-26 meshes.

8. A soil contamination treatment apparatus according to claim 2, wherein: the air stirring pipe (3) comprises an annular pipe and a cross pipe, the annular pipe is coaxially arranged in the shower tank (4), the center of the annular pipe is connected with the cross pipe, four connectors of the cross pipe are communicated with the annular pipe, and the center of the cross pipe is connected with the air inlet (3-1).

9. A soil contamination treatment apparatus according to claim 8, wherein: and air outlet holes are formed in the bottoms of the air stirring pipes (3), and the aperture of the air outlet holes in the cross pipe is smaller than that of the air outlet holes in the annular pipe.

10. A soil contamination treatment apparatus according to claim 1, wherein: the height of the bending part of the connecting pipe (6) is not lower than that of the lowest screen mesh in the leaching tank (4).