TWI549764B - A treating method of removing heavy metals in soil grains with mobility - Google Patents

Description

Mobile method for separating soil particles containing heavy metals

The invention relates to a method for separating soil particles containing heavy metals, in particular to a method for manually separating soil particles containing heavy metals.

In recent years, industrial development, wastes generated from related industries, waste water, waste gas from petrochemical industry, and dust emission caused by burning of waste metal may cause heavy metal pollution in different degrees of soil. The heavy metals in the main contaminated soil are arsenic and cadmium. , chromium, mercury, nickel, lead, zinc and copper, etc., however, some of the heavy metals mentioned above may be required by plants, whereas when the amount is large, they may cause poisoning, and at the same time, the soil contains too much heavy metals. Absorption and accumulation in plants, so that humans ingestion of plants containing these heavy metals through the food chain, thereby affecting health; therefore, the US Environmental Protection Agency has studied this crisis and found that most organic/inorganic pollutants are often attached to fine particles. On the surface (such as clay and bauxite), in this case, physical separation technology can be used to separate the large particulate matter first, which can greatly reduce the volume of the contaminated sediment to be treated, so that the physical separation technology can be used here. The lower part separates the removed material according to its physical properties such as particle size, appearance, specific gravity and magnetic properties.

However, although the above method can be effectively separated according to physical properties, before the separation process, it is necessary to concentrate the heavy metal contaminants in the soil and then send them to the heavy metal recycling plant for recycling treatment, and at the same time, after separation. The difficulty of removing heavy metal attached to large granular soil or gravel will affect the unit price of the physical separation technology. If the simple water washing process is used to separate the contaminants, the treatment cost can be reduced, but the washing process can only be attached to the treatment. If there is a contaminant on the surface, and if it is to be treated on the non-adhesive surface, it is necessary to carry out multiple processes such as crushing and grinding, and the processing cost will need to be increased. Therefore, when the domestic industry is also When all the above-mentioned pollutants are treated, they are transported in a large amount. At the same time, the soil to be treated and the soil to be treated will be transported back together and treated at the same time. However, if the disposal site and the pollution site are both The distance between the ground is very long, and the processing time is long and the speed is slow, which is not only time-consuming and laborious, but also incurs the processing cost. In view of this, therefore, the development of this case.

Accordingly, it is an object of the present invention to provide a mobile method for separating soil particles containing heavy metals, which can be quickly processed in a mobile manner, which not only reduces the environmental pollution load, but also facilitates the reuse of soil resources, and saves time in the process. It saves effort and can significantly reduce the cost of pollutant treatment.

Therefore, the method for manually separating the heavy metal-containing soil particles of the present invention comprises a collecting step, a preliminary screening step, a hydraulic separating step and a treating and recovering step; wherein, by the hydraulic separating step From the equipment, through the hydrocyclone separation method, the size of the coarse particles and the fine particles are separated in the small-diameter soil after screening in the previous step, and the previous step is separated in the treatment recovery step. The coarse-grained soil is discharged by a hydraulic cleaning system, and the heavy metal materials attached to the fine particles are removed and separately recovered through a solid-liquid separation system, so that the contaminated soil is obtained. Effectively rectified, so the use of maneuvering, so that the overall process can be carried out in a consistent manner, without the need for a large collection, moving to other places and processing time is too long, that is, in the contaminated place without interruption The method is continuously processed, and the recycling process is fast, so as to effectively shorten the processing time of the treatment process, not only can reduce the environmental pollution load, but also facilitate the reuse of soil resources, and at the same time, the pollutant treatment cost can be greatly reduced.

〔this invention]

1‧‧‧Mobile separation of soil particles containing heavy metals

11‧‧‧Collection steps

12‧‧‧Preliminary screening steps

13‧‧‧Hydraulic separation steps

14‧‧‧Recycling steps

111‧‧‧ Container

120‧‧‧Dryer

121‧‧‧ Screening machine

141‧‧‧Hydraulic cleaning system

142‧‧‧Solid-liquid separation system

2‧‧‧ device

3‧‧‧Separator

31‧‧‧Agitating mechanism

311‧‧‧ body

312‧‧‧Activity

313‧‧‧Output tube

32‧‧‧Separation agency

321‧‧‧Conical body

322‧‧‧ accommodating space

323‧‧‧ entrance

324‧‧‧ Collecting

325‧‧‧Acceptance

4‧‧‧螫合剂

1 is a flow chart of a preferred embodiment of the present invention.

Figure 2 is a schematic illustration of the apparatus of use of the preferred embodiment of the present invention.

3 is a block diagram showing the processing of the preferred embodiment of the present invention.

The above and other technical contents, features, and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

Referring to Figure 1, a preferred embodiment of the present invention, the present embodiment The method for dynamically separating the heavy metal-containing soil particles 1 includes a step of collecting step 11, a preliminary screening step 12, a hydraulic separation step 13 and a treatment recovery step 14; wherein the collection step 11 is provided with a plurality of The clean container 111 collected and contained by the contaminated soil can be removed for the contaminated soil in the container 111, and the visible large-sized debris such as gravel and branches can be removed first for profit. The next step is carried out.

Continuing with the above, the preliminary screening step 12 is provided with a screening machine 121, and the screening machine 121 is designed to have a plurality of screening holes, which can select a suitable screening hole according to the particle size of the soil to be sieved at the moment. If the soil system to be sieved as desired has a particle size of less than 2 mm, the screening machine 121 for performing the current operation can be selected for screening the soil particle size, so that the front can be targeted. The contaminated soil collected in one step is screened and classified according to the size and particle size, and the large-sized soil after screening is removed, and only the soils classified as the above-mentioned small-sized particles are subjected to subsequent treatment; In this embodiment, the preliminary screening step is further provided with a dryer 120 before the screening machine 121 performs processing, so as to have a wet knot in the contaminated soil collected for the first step. The blocky soil is dried for subsequent operations.

Referring to FIG. 2, the hydraulic separation step 13 is provided with a separator 3 (shown in a simplified manner), and the separator 3 includes a stirring mechanism 31 and a separating mechanism 32. The stirring mechanism 31 has a body 311, an actuating member 312 extending into the base 311, and a bottom end of the base 311 for The separating mechanism 32 is connected to the conveying pipe 313. The separating mechanism 32 has a conical body 321 which is wide and narrow, and has an accommodating space 322 therein. One of the conical bodies 321 is disposed on the conical body 321 and is connected to the conveying pipe. An inlet 323 of the connection 313, a collecting tube 324 disposed at the end of the tapered body 321 and extending into the tapered body 321 at one end, and a receiving hopper 325 disposed under the tapered body 321 311 can be used for placing the small-sized soils, and according to the weight of the small-sized soils, the appropriate proportion of water is injected, and then the operation is controlled according to the ratio of the small-sized soils and waters. The member 312 outputs an appropriate driving force to perform stirring operation in the seat body 311, for example, as follows: for example, the ratio of the small-sized soil to water is 1:30 or 1:40, which controls the actuating member. The driving force generated by the 311 can be 14 psi, so that the small-sized soil and water are mixed in the form of muddy water under the stirring action of the actuating member 312. Of course, when the ratio of the small-sized soil to water is different, The driving force generated by controlling the actuating member 312 also needs to be In the setting, during the stirring and mixing process, a gas (not shown) may be injected into the seat body 311 to increase the pressure inside the seat body 311, so that the seat body 311 has sufficient pressure to mix. The muddy water enters the accommodating space 322 of the tapered body 321 through the inlet 323 through the inlet pipe 313, and at the same time, the tapered body 321 is disposed in the accommodating space. The muddy water in 322 generates a centrifugal force and generates a centrifugal force, and the centrifugal force and the high flow velocity of the high-speed water flow reduce the force of the sedimentation, so that the coarser and heavier particles in the muddy water are tapered by the cone. The tail of the body 321 is discharged to the receiving bucket 325, and the lighter and finer particles are discharged in the water. Under the action of the heart force, the vortex rises to the outside of the collecting pipe 324, and the suspended matter having different density can be separated from the mud water by the centrifugal force.

Finally, the process recovery step 14 is provided with a hydraulic cleaning system 141, and a solid-liquid separation system 142; wherein the hydraulic cleaning system 141 can clean the coarse particles separated by the foregoing steps, so as to make the coarse The granular soil is cleaned and then discharged into clean granular soil; and the solid-liquid separation system 142 can separate the solid and liquid from the fine-grained soil and suspended matter overflowing through the collecting pipe 324. Treating and separating the clean soil and the wastewater containing heavy metals, in particular, in the present embodiment, a chelating agent 4 is added to the liquid obtained by the solid-liquid separation system 142 to target the liquid. The heavy metals in the mixture are separated and recovered, and then recycled in a different manner.

Referring to FIG. 1 to FIG. 3, before the processing in this embodiment, the dryer 120, the screening machine 121, is disposed on a movable device 2 (such as a container truck or the like, which is shown in a simplified diagram). The separator 3, the hydraulic cleaning system 141, and the solid-liquid separation system 142 and the like can move the device 2 to a site contaminated by heavy metals for processing, of course, the progress time of the treatment needs to be processed, and the scope of the pollution is timely. Multiple sets of movable devices 2 are added to facilitate simultaneous treatment of contaminated soil.

Furthermore, when processing, the operator can collect the soil in the contaminated site that has been planned in advance for the treatment and application, and respectively Placed in the containers 111, and the gravel, branches, etc., which are too large in size, which can be visually obtained, can be removed first (ie, the collection step 11), and collected in the containers. If the soil in 111 is dry and diffused, the preliminary screening operation can be carried out directly. If the collected soil is mostly wet and agglomerated, it can be used before the preliminary screening operation. The drier 120 is used to dry the moist and lumped soil to form a dispersing shape, whereby the collected soil can be subjected to preliminary screening operation via the sifter 121, Most of the organic/inorganic contaminants are often attached to the finer particle size, so that the soils of the solid particles below the 2 mm particle size after sieving by the sieving machine 121 are all collected for the next step. The steps are carried out. Conversely, solid particles larger than 2 mm in size are filtered off and reset to the site.

Continuing the foregoing, the soils having a particle size of less than 2 mm after the sieving are subjected to the treatment of the hydraulic separation step 13, and at this time, the soil and the proportion of water corresponding to the soil are placed in the stirring mechanism 31. Then, the actuating member 312 of the stirring mechanism 31 is driven to generate a stirring drive in the seat body 311, so that the soil and water are mixed under the action of the actuating member 35 to be in a muddy state, and during the stirring process. A gas is injected into the seat body 311, thereby increasing the pressure in the seat body 311, so that the muddy water in the seat body 311 is pressurized to a high flow rate, and the outlet pipe 313 enters the inlet pipe 313. In the conical body 321 , the wide and narrow design of the conical body 321 allows the muddy water to enter the accommodating space 322 to generate a strong swirling flow of water, so that the flow is high. The speed and centrifugal force can quickly separate the two kinds of partition sizes, such as coarse and fine particles. At the same time, the coarser and heavier particles form a sinking and descending force in the hydrocyclone effect. The tail of the body 321 is discharged and received by the receiving hopper 325. Of course, the lighter and thinner particles and the suspended matter having different densities in the water are eddy current under the action of the swirling effect centrifugal force. It rises to the collection pipe 324 and overflows uniformly, and is uniformly collected, thereby effectively achieving a large number of accurate distinctions, which is more advantageous for the subsequent steps.

Then, the two sizes of particles separated by the separator 3 are respectively re-entered into the hydraulic cleaning system 141 and the solid-liquid separation system 142 for processing and recovery operations, so that the hydraulic cleaning system 141 is The coarse particles are washed, and the heavier and coarser particles are separated by the hydrocyclone, and the amount of organic matter remaining thereon is less. Therefore, the organic cleaning system 141 can be used to remove a trace amount of organic matter. The material is removed, whereby the heavier, coarser particles are released into the cleaned soil and immediately released back to the original site. In addition, the lighter and finer particles and the density mixed in the water are different. The substance can be uniformly treated by the solid-liquid separation system 142 after a large amount of collection, so that substances having heavy metal species attached to the lighter and finer particles are dissolved, so that the material is finer. The lighter particles further distinguish between solids (ie clean soils) and waste water (liquids) containing heavy metals, since these solids are excluded in order to exclude the attachment of such heavy metals. Namely indeed effective to use the remediation site after release Press, of course, waste water containing heavy metals (a liquid) can be added to the chelating agent 4, for the liquid to The heavy metals are separated and recovered, and the final treatment and recovery are carried out in different ways; in other words, the whole process can be carried out in a consistent manner, without a large collection and then transported to another place, and The processing time is too long, and the method for processing the soil particles containing the heavy metal containing the mobile type of the present invention can be continuously processed in an uninterrupted manner on the original site of the contaminated site, so as to effectively shorten the processing time of the processing process, not only It can reduce the environmental pollution load, and is more conducive to resource reuse, while significantly reducing the cost of pollutant treatment.

From the above description, it can be known that the mobile method for separating the heavy metal-containing soil particles of the present invention does have an improvement in efficacy, and is summarized as follows:

1. The present invention integrates the equipment required to treat contaminated soil on a movable device 2, which not only has mobility, but also utilizes the collection step 11, the preliminary screening step 12, the hydraulic separation step 13 and The treatment and recovery step 14 and the like are carried out in a consistently implemented operation mode, and the contaminated soil can be immediately treated after the soil collection is carried out, so that the contaminated soil can be effectively treated, thereby eliminating the conventional treatment. Before the large amount of collection and the lack of a large number of carrying methods, it can effectively shorten the treatment process of heavy metal containing soil, not only can reduce the environmental pollution load, but also facilitate the reuse of resources, and at the same time significantly reduce the cost of pollutant treatment.

2. Continuing the above, and in view of the fact that the present invention is a mobile treatment of contaminants, the soil is utilized either by the preliminary screening step 12. Screening of large and small particle sizes, or the subsequent separation of finer particles by the separator 3 having a centrifugal effect of water flow, can be used in the first time after screening and after separation. The organic/inorganic soil attached to the soil and the cleaned soil are reset back to the original site, so as to greatly eliminate the time-consuming method that the conventional knowledge must be processed after being processed in other places, and the cost of freight costs can be saved. To significantly reduce the cost of pollutant treatment.

In summary, the present invention is a mobile separation method for soil particles containing heavy metals, which is mainly for maneuvering treatment of soil contaminated by heavy metals, and is consistently carried out by a collection step, a preliminary screening step, a hydraulic separation step, and a treatment recovery step. The operation mode of the implementation can be moved to the required site at any time and can be processed in an uninterrupted manner. The recycling process is fast, so as to effectively shorten the processing time, not only reduce the environmental pollution load, but also reduce the environmental pollution load. The beneficial resources can be reused, and at the same time, the effects of the pollutant treatment cost and the like can be greatly reduced, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the description of the invention. All should remain within the scope of the invention patent.

1‧‧‧Mobile separation of soil particles containing heavy metals

11‧‧‧Collection steps

12‧‧‧Preliminary screening steps

13‧‧‧Hydraulic separation steps

14‧‧‧Recycling steps

111‧‧‧ Container

120‧‧‧Dryer

121‧‧‧ Screening machine

141‧‧‧Hydraulic cleaning system

142‧‧‧Solid-liquid separation system

3‧‧‧Separator

4‧‧‧螫合剂

Claims (4)

A mobile method for separating soil particles containing heavy metals, comprising: a collecting step, which is provided with a plurality of containers for collecting and holding contaminated soil, and for collecting contaminated soil in the aforementioned containers The coarse particle size is removed; a preliminary screening step is provided with a screening machine, which is a design with a plurality of screening holes, which can be used for screening and classifying the size and particle size of the contaminated soil. For the removal of the large-sized soils, only the aforementioned small-diameter soils are subjected to subsequent treatment; a hydraulic separation step is provided with a separator, and the separator adopts a water-flowing swirling actuating manner to make the front After the screening of the small-sized contaminated soil after the screening, the water is separated by a swirling flow method, so that the granular particles and the coarse particles are separated into two sizes of the contaminated soil particles; and a treatment and recovery step, The processing step is provided with a hydraulic cleaning system and a solid-liquid separation system, wherein the hydraulic cleaning system can clean the coarse particles obtained in the previous step to form a The net soil is discharged, and the solid-liquid separation system processes the remaining fine particles to remove the heavy metal attached to the fine particles, and the treated fine particles are discharged to the treated Used in soil. The method for processing a heavy metal-containing soil particle according to the first aspect of the patent application, wherein the separator comprises a stirring mechanism and a separating mechanism, wherein the stirring mechanism has a body and a body is placed in the body The actuating member, and a conveying pipe disposed at the bottom end of the seat body for connecting with the separating mechanism, the separating mechanism has a conical body which is wide and narrow, and has an accommodating space therein. An inlet of the body and connected to the conveying pipe, a collecting pipe disposed at the upper end of the conical body and extending into the conical body at one end, and a receiving bucket disposed under the conical body, The small particle size is mixed with water into the body, and enters the accommodating space through the inlet through the conveying pipe under the action of the actuating member, so that the collecting pipe can collect lighter and finer particles, and the receiving bucket can be Undertake coarser particles. The method for treating soil particles containing heavy metals by motorized separation according to the first aspect of the patent application, the liquid obtained by treating the fine particles by the solid-liquid separation system, is further added with a chelating agent to separate the heavy metals. The method for processing a soil particle containing heavy metal according to the first aspect of the patent application, wherein the preliminary screening step is further provided with a dryer before the screening machine to perform the collection on the contaminated soil. Drying treatment.