CN211004604U

CN211004604U - Sodium polytungstate recovery and regeneration system in soil organic carbon grouping research

Info

Publication number: CN211004604U
Application number: CN201922112070.7U
Authority: CN
Inventors: 吴会军; 李景
Original assignee: Institute of Agricultural Resources and Regional Planning of CAAS
Current assignee: Institute of Agricultural Resources and Regional Planning of CAAS
Priority date: 2019-12-01
Filing date: 2019-12-01
Publication date: 2020-07-14
Anticipated expiration: 2029-12-01

Abstract

The utility model discloses a poly sodium tungstate's recovery and regeneration system in soil organic carbon grouping research, including transversal personally submitting "W" type funnel and cylindric filter, the filter is including straining a section of thick bamboo and strain the filter core that sets up in the section of thick bamboo, the filter core is by last to being equipped with first impervious barrier, first activated carbon layer, cation exchange resin layer, anion exchange resin layer, second activated carbon layer and the impervious barrier of second in proper order under to, separates mutually with the glass cotton between each adjacent filter core layer. The system provided by the utility model has longer water conservancy dwell time and seepage flow route, can make pending solution and filter medium have longer contact time and area, improves the high-efficient absorption of filter medium impurity in to solution greatly and gets rid of efficiency. The obtained sodium poly-tungstate has high purity, can be repeatedly utilized, and ensures the quality. The treatment process is simple, improves the production efficiency, has no secondary pollution, has lower production cost and is suitable for popularization and use.

Description

Sodium polytungstate recovery and regeneration system in soil organic carbon grouping research

Technical Field

The utility model relates to a recycle technical field, very much relate to a poly sodium tungstate's recovery and regeneration system in soil organic carbon grouping research.

Background

The organic carbon in the soil is a mixture of degradation substances of animals, plants and microbial residues in various stages, and the organic carbon with different components has different storage capacities and obvious difference in ecological service functions, so that a scientific and reasonable method for grouping the organic carbon in the soil is established, and the method has important significance for effectively distinguishing and deeply knowing heterogeneous organic carbon components.

Early studies of soil organic carbon mainly used a chemical grouping method, and the organic carbon is generally divided into two components of activity and stability based on the difference of solubility and oxidizability of the soil organic carbon in various extractants. In contrast, the physical grouping method has become the mainstream of research on the organic carbon component of soil in recent years because of its small destructiveness. The method is characterized in that a sodium polytungstate solution with high relative density is adopted to separate free organic substances with low relative density from organic-inorganic complex with high relative density in soil, and in addition, the sodium polytungstate can avoid the negative effect of residual water in a sample and the adsorption phenomenon of a surfactant and an organic solution on soil components, and the sodium polytungstate solution has a very good extraction effect and high recovery rate and is widely adopted.

In the process of grouping soil organic carbon by using sodium poly-tungstate, because soil components are complex, acid, alkali, oxidation or enzyme treatment is often adopted to remove hydrophilic/alkaline organic matters, ensure the reliability of identification and quantification of soil organic carbon and generate a large amount of waste solution. Generally, although the waste liquid contains a large amount of sodium polytungstate, if the waste liquid is directly reused, the contained impurities can pollute a soil sample separated later, and particularly in the research of soil organic carbon, the organic carbon measurement result in the subsequent separated sample is influenced. However, in the prior art, the waste liquid is not usually recovered and treated effectively, and is simply discharged. On one hand, from the viewpoint of environmental protection, in the discharge process of the waste liquid, besides occupying a large amount of soil, some chemical components of the waste liquid infiltrate into the soil along with water, which easily causes the deterioration of the composition, structure and physicochemical properties of the soil, and more seriously, the waste water generated by the waste containing heavy metals infiltrates into the ground and easily causes groundwater pollution, so that the groundwater forms heavy metal pollution. On the other hand, from the viewpoint of effective reuse of resources, sodium polytungstate contained in the waste liquid has a high value, and is easily wasted by direct discharge.

SUMMERY OF THE UTILITY MODEL

Not enough to above-mentioned prior art, the utility model aims to provide a sodium polytungstate's recovery and regeneration system in soil organic carbon grouping research has solved the direct emission of current abandonment sodium polytungstate solution to cause wasting of resources and environmental pollution's problem. By adopting the system, the waste liquid can be prevented from generating harmless treatment of secondary pollution, and the sodium polytungstate can be separated, recycled and reused.

In order to solve the technical problem, the utility model discloses a following technical scheme: a recycling and regenerating system based on sodium poly tungstate in soil organic carbon component research comprises a funnel with a W-shaped cross section and a cylindrical filter, wherein a water guide pipe is arranged downwards at a convex part in the middle of the funnel, a screen is further arranged at a water guide pipe opening, the filter comprises a filter cylinder and a filter element tightly arranged in the filter cylinder, the filter element is sequentially provided with a first impermeable layer, a first activated carbon layer, a cation exchange resin layer, an anion exchange resin layer, a second activated carbon layer and a second impermeable layer from top to bottom, and adjacent filter element layers are separated by glass wool; a plurality of partition plates are arranged in the vertical direction of the first activated carbon layer and the second activated carbon layer to form an S channel; the anion exchange resin layer and the cation exchange resin layer are respectively and vertically provided with a screw, the surface of the screw is fixedly connected with a helical blade, and the outer edge of the helical blade is abutted against the inner wall of the filter cartridge; the inlet tube is linked together through first impervious barrier and first activated carbon layer, be provided with the outlet pipe in the second impervious barrier and extend to outside the filter for collect the sodium polytungstate solution after the edulcoration.

By adopting the structure, when the solution to be treated enters the funnel with the cross section of W-shaped, the solid impurities can be accumulated in the concave position of the W-shaped funnel under the action of gravity, so that the solid impurities are prevented from blocking the water guide pipe opening. The activated carbon layer is internally provided with a plurality of clapboards which divide the interior of the activated carbon layer into a channel which is bent back and forth, thereby effectively prolonging the hydraulic retention time and seepage path of the solution, enabling the solution to be treated to have longer contact time and area with the activated carbon, and ensuring that the activated carbon can efficiently remove fine particles in the solution. The arrangement of the spiral blades in the anion exchange resin layer and the cation exchange resin layer enables a solution to be treated to flow spirally along the anion exchange resin or the cation exchange resin filled between the spiral blades, fully increases the contact efficiency between the solution and the exchange resin, increases the removal effect of the cation exchange resin on cations such as calcium, magnesium and the like in the solution, and increases the removal effect of the anion exchange resin on sulfate radicals, nitrate ions and the like.

Furthermore, the clapboards and the inner wall of the filter cylinder are provided with notches, and the adjacent two clapboards and the notches of the inner wall of the filter cylinder are alternately arranged to form an S-shaped channel.

Furthermore, through holes are formed in one section of each partition board, and the through holes of two adjacent partition boards are alternately arranged to form an S-shaped channel.

Further, the baffle downward sloping sets up, and inclination is 15 ~ 30. Therefore, on the premise of prolonging the seepage path of the solution to be treated in the activated carbon layer, the flow speed of the solution to be treated is improved, and the treatment time is shortened.

Further, helical blade is that 2 ~ 4mm steel sheet is folding to be formed, and helical blade's spiral contained angle is 36. Therefore, the structural strength of the inner cavity of the filter element is improved, and the flowing speed of the solution among the spiral blades is increased.

Further, the thickness ratio of the first activated carbon layer, the cation exchange resin layer and the anion exchange resin layer is 3:1: 1.

Furthermore, the mesh number of the screen is 300-400 meshes. In this way, larger particulate impurities are intercepted.

Furthermore, a water swelling and stopping rubber ring which swells when encountering water is adhered between the filter cylinder and the filter element. Therefore, the rubber generates multiple times of expansion deformation after meeting water, all irregular surfaces, cavities and gaps of the joint are filled with the rubber, and huge contact pressure is generated at the same time, so that leakage is thoroughly prevented, and the solution is prevented from flowing out from the gap between the filter cylinder and the filter element.

Furthermore, the thickness of the glass wool is 2-5 cm.

Furthermore, a control valve is further arranged on the outlet pipe, so that the water outlet speed can be effectively adjusted.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the system provided by the utility model has longer water conservancy dwell time and seepage flow route, can make pending solution and filter medium have longer contact time and area, improves filter medium high efficiency and adsorption of impurity in to solution greatly and gets rid of efficiency. The design of a layered filter element layer is adopted, so that the solution can uniformly flow through different filler layers and fully react, and the solution purification effect cannot change along with the change of flow; the cross section of the funnel is W-shaped, so that the dilemma of blockage caused by solid impurities entering the water guide pipeline is effectively relieved; due to the arrangement of the glass wool, the smoothness of solution infiltration is better ensured, and the isolation between layers is ensured.

2. The utility model provides a system is through filtering the purity height of gathering sodium tungstate in the poly sodium tungstate solution that retrieves and obtain, and reuse can be realized to no impurity to can guarantee the quality. The treatment process is simple, improves the production efficiency, does not generate secondary pollution to the environment, has lower production cost and is suitable for popularization and use. The problem of waste liquid processing difficulty among the prior art is solved, environmental protection has been promoted, has realized the effect of abundant recovery of the resource of added value maximize and recycle.

3. The invention provides a harmless treatment and resource utilization method for recycling and regenerating sodium polytungstate waste liquid, and has a good application prospect.

Drawings

Fig. 1 is a schematic view of the structure of a system for recovering and regenerating sodium polytungstate according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples. The components of the system are all standard parts or parts known to those skilled in the art, and the structure and principle of the components are known to those skilled in the art through technical manuals or through routine experiments.

In the specific implementation: as shown in figure 1, a system for recovering and regenerating sodium polytungstate in soil organic carbon component research comprises a funnel 1 with a W-shaped cross section and a cylindrical filter 2, wherein a small amount of ethylenediamine tetraacetic acid is added into waste liquid containing sodium polytungstate in soil organic carbon component research to enable sodium polytungstate calcium to be combined with precipitates to be changed into soluble substances, and a solution to be pretreated is obtained. And then adding the solution to be treated into a funnel 1 with a W-shaped cross section to purify sodium polytungstate, wherein a water guide pipe 3 is arranged downwards at the convex part in the middle of the funnel 1, and larger solid particles in the solution are intercepted by a screen mesh, can slide down under the action of gravity and are accumulated in the concave part of the W-shaped funnel, so that the solid particles are prevented from blocking a water guide pipe opening. The filter comprises a filter cylinder and a filter element tightly arranged in the filter cylinder, and a water swelling and stopping rubber ring is adhered between the filter cylinder and the filter element. The rubber generates multiple times of expansion deformation after meeting water, is full of all irregular surfaces, cavities and gaps of seams, generates huge contact pressure, thoroughly prevents leakage, and avoids the solution from flowing out of the gap between the filter cartridge and the filter element. The filter element is provided with a first impermeable layer 4, a first activated carbon layer 6, a cation exchange resin layer 9, an anion exchange resin layer 10, a second activated carbon layer 11 and a second impermeable layer 12 from top to bottom in sequence, and adjacent filter element layers are separated by glass wool 5; the glass wool has the characteristics of good stability, high temperature resistance, high efficiency, large capacity, long service life and the like, plays a good isolation role, and can effectively intercept and retain larger residual particle impurities. A plurality of partition plates 7 are arranged in the first activated carbon layer and the second activated carbon layer in the vertical direction to form an S-shaped channel, so that the interior of the activated carbon layer is divided into a channel which is bent back and forth, the hydraulic retention time and seepage path of the solution are effectively prolonged, the solution to be treated can be in longer contact with the activated carbon, and the activated carbon is ensured to efficiently remove fine particles in the solution; baffle downward sloping sets up, and inclination is 15 ~ 30. Therefore, on the premise of prolonging the seepage path of the solution to be treated in the activated carbon layer, the flow speed of the solution to be treated is improved, and the treatment time is shortened. The anion exchange resin layer and the cation exchange resin layer are respectively vertically provided with a screw 8, the surface of the screw is fixedly connected with a spiral blade 13, the outer edge of the spiral blade 13 is abutted against the inner wall of the filter cylinder, so that a solution to be treated can spirally flow along the anion exchange resin or the cation exchange resin filled between the spiral blades, the contact efficiency between the solution and the exchange resin is fully increased, the removal effect of the cation exchange resin on cations such as calcium, magnesium and the like in the solution is increased, the hardness of water is reduced, and the removal effect of the anion exchange resin on sulfate radicals, nitrate ions and the like is improved; helical blade is formed for 2 ~ 4mm steel sheet is folding, and helical blade's spiral contained angle is 36. Therefore, the structural strength of the inner cavity of the filter element is improved, and the flowing speed of the solution among the spiral blades is increased. Aqueduct 3 is linked together through first impervious barrier and first activated carbon layer, be provided with outlet pipe 14 in the second impervious barrier and extend to outside the filter for collect the sodium polytungstate solution after the edulcoration. The outlet pipe is also provided with a control valve 15, so that the water outlet speed can be effectively adjusted. And finally, adding a few drops of hydrogen peroxide into the sodium polytungstate solution after impurity removal collected by the water outlet pipe orifice, so that the cleaned sodium polytungstate solution is in a non-reduction state. So that the solution remains transparent or yellowish.

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 present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The system for recycling and regenerating sodium polytungstate in the grouping research of soil organic carbon is characterized by comprising a funnel (1) with a W-shaped cross section and a cylindrical filter (2), wherein a water guide pipe (3) is arranged downwards at a convex part in the middle of the funnel, a screen is further arranged at the opening of the water guide pipe (3), the filter comprises a filter cylinder and a filter element tightly arranged in the filter cylinder, the filter element is sequentially provided with a first impermeable layer (4), a first activated carbon layer (6), a cation exchange resin layer (9), an anion exchange resin layer (10), a second activated carbon layer (11) and a second impermeable layer (12) from top to bottom, and adjacent filter element layers are separated by glass wool (5); a plurality of partition plates (7) are arranged in the vertical direction of the first activated carbon layer (6) and the second activated carbon layer (11) to form an S-shaped channel; the anion exchange resin layer (10) and the cation exchange resin layer (9) are respectively and vertically provided with a screw (8), the surface of the screw is fixedly connected with a helical blade (13), and the outer edge of the helical blade (13) is abutted against the inner wall of the filter cartridge; aqueduct (3) are linked together through first impervious barrier and first activated carbon layer, be provided with outlet pipe (14) in the second impervious barrier and extend to outside the filter for collect the poly sodium tungstate solution after the edulcoration.

2. The sodium polytungstate recovery and regeneration system for grouped research on soil organic carbon according to claim 1, wherein the partition plates (7) and the inner wall of the filter cylinder are provided with notches, and two adjacent partition plates (7) and the notches of the inner wall of the filter cylinder are alternately arranged to form an S channel.

3. The sodium polytungstate recovery and regeneration system for grouped research on soil organic carbon according to claim 1, wherein the partition plates (7) are provided with through holes at one section, and the through holes of two adjacent partition plates (7) are alternately arranged to form an S channel.

4. The sodium polytungstate recovery and regeneration system for organic carbon composition research in soil according to claim 2 or 3, wherein the partition plate (7) is inclined downwards at an angle of 15-30 °.

5. The sodium poly tungstate recovery and regeneration system for soil organic carbon research, as claimed in claim 1, wherein the helical blades (13) are formed by folding 2-4 mm steel plates, and the included angle of the helical blades is 36 °.

6. The system for recovering and regenerating sodium polytungstate in the grouping research of organic carbon in soil according to claim 1, wherein the thickness ratio of the first activated carbon layer (6), the cation exchange resin layer (9) and the anion exchange resin layer (10) is 3:1: 1.

7. The system for recovering and regenerating sodium polytungstate in the grouping research of organic carbon in soil according to claim 1, wherein the mesh number of the screen is 300-400 meshes.

8. The system for recycling and regenerating sodium polytungstate in the grouping research of organic carbon in soil according to claim 1, wherein a water-swelling water-stopping rubber ring is adhered between the filter cylinder and the filter element.

9. The recycling and regenerating system for sodium polytungstate in the grouping research of organic carbon in soil according to claim 1, wherein the thickness of the glass wool (5) is 2-5 cm.

10. The sodium polytungstate recovery and regeneration system for grouped research on soil organic carbon according to claim 1, wherein a control valve (15) is further arranged on the water outlet pipe (14).