CN209039143U - A combined biological filler of nickel foam and iron carbon - Google Patents

Abstract

The utility model discloses the combined bio filler of a kind of nickel foam and iron carbon, including nickel foam, iron carbon particle is coated in the nickel foam；The nickel foam is ultra-thin knitmesh type laminated structure；The iron carbon particle matrix is cylindrical pellet, and appearance is covered with iron element spicule；The needle-shaped net uniform fold of irony is in iron carbon particle surface.Using technical solutions of the utility model, the energy consumption of waste water, waste gas cleaning system can be substantially reduced, process treatment process is not related to secondary pollution, and can sufficiently improve the purification efficiency of persistent organic pollutants.

Description

A combined biological filler of nickel foam and iron carbon

technical field

The utility model belongs to the technical field of electrochemical treatment of organic waste water and organic waste gas, in particular to a combined biological filler of foamed nickel and iron carbon.

Background technique

Water and atmosphere are important foundations for human life and production, and are indispensable resources for human beings. However, since the twentieth century, with the rapid development of industry, more and more untreated or partially treated industrial waste liquids have infiltrated into the ground, injected into surface water bodies such as rivers or lakes, and the types and quantities of waste water have increased rapidly. Affecting the water quality of aquifers and surface water bodies aggravates the crisis of water resources, and the quality of water bodies in the world is generally threatened. Due to the complex composition of industrial wastewater, organic wastewater treatment is more difficult and more important than municipal wastewater treatment. Organic wastewater not only has complex components and contains toxic substances, but also contains mostly aromatic compounds and heterocyclic compounds, as well as sulfides and toxic organic compounds. And the color is high, there is peculiar smell. Some wastewater emits a pungent stench, which has adverse effects on the surrounding environment and threatens human health and safety. In addition, with the economic development, a large number of chemical enterprises are emitting a large amount of industrial waste gas every year, and a large amount of industrial organic waste gas is discharged, which has caused a sharp decline in the quality of the atmospheric environment. There are more and more organic compounds, which often have a foul odor, which not only stimulates various human senses, but also has certain toxicity, which seriously affects the health and safety of human life, which greatly restricts human society. survival and economic development.

In order to solve the large increase in the treatment of organic wastewater and organic waste gas, especially the refractory toxic and harmful pollutants that seriously damage water quality and air quality, it is necessary to seek low investment, low operating costs, high efficiency, stability, and the ability to remove pollutants. The multi-functional characteristics of the organic waste water, especially the advanced technology of sewage treatment with good efficiency for the advanced treatment of refractory biodegradable waste water and waste gas. The biological method of china is powerless in the treatment of these organic substances. As far as the current situation is concerned, the purification process of refractory organic pollutants still needs to be developed and improved.

The existing wastewater treatment technologies include physical method, chemical method, biological treatment method, etc. Compared with other methods, biological method has attracted much attention due to its advantages of low operating cost, large processing capacity, wide application range and no secondary pollution. The existing waste gas treatment technologies include adsorption method, absorption method, oxidation method, biological treatment method, etc. Compared with other treatment technologies, waste gas biological treatment technology has the advantages of high treatment efficiency, low cost and environmental friendliness, so it is widely accepted by people. Widespread concern. However, due to the complex composition of organic pollutants, there are many toxic and harmful pollutants that are difficult to biodegrade in wastewater, and traditional biological methods are powerless to deal with these organic pollutants; waste gas biological treatment technology involves the gas-liquid mass transfer of organic matter. The biological method is low in mass transfer efficiency when treating organic waste gas with complex composition, and the purification efficiency of waste gas is not high. Therefore, scholars have done a lot of research and improvement on the basis of biological methods, and found that the electrode biofilm method not only saves costs, but also improves the purification efficiency of organic pollutants. Recently, the advanced oxidation method has gradually attracted the attention of countries all over the world due to its advantages of fast reaction speed, complete treatment, no pollution, and wide application range, and research and development work in this direction has been carried out successively. As an advanced oxidation technology, the electro-Fenton method is widely used in refractory biodegradation because of its relatively mature and simple process, which can be realized without special equipment, and as the reactant and catalyst of the oxidation reaction, iron has economic advantages. wastewater field. Scholars at home and abroad have done a lot of research work on electrode biofilm method and electro-Fenton technology. Compared with traditional biological methods, electrode biofilm method and electro-Fenton technology take advantage of the advantages of electrodes, which not only have the advantages of short process, low investment, It has the advantages of low operating cost and convenient operation and management. The electron donor also enhances the degradation efficiency of microorganisms on organic pollutants, and further promotes the development of organic wastewater and organic waste gas purification systems in the direction of high efficiency and low consumption, and the engineering application prospect is very broad.

The Chinese utility model patent with the patent number of ZL201020166785.7 discloses a Raschig ring packing, including a ring body, and 2 to 5 circular holes are arranged on the ring wall of the ring body, which improves the porosity and fluidity of the Raschig ring. However, the firm strength of the Raschig ring decreases, and the specific surface area of the Raschig ring packing is small, which is not conducive to biological hanging in the biological trickling filter device. Membranes, there is also the problem of high packing pressure drop causing clogging of the biotrickling filtration device. The Raschig ring packing is more suitable as a chemical packing.

The Chinese utility model patent application with publication number CN102060374A discloses a preparation method of a composite biological filler. The organic filler polyvinyl chloride is used as a skeleton, and the organic filler polyvinyl chloride skeleton is a multi-faceted hollow spherical or Pall ring; The vinyl chloride framework is immersed in a polyvinyl alcohol solution with a mass concentration of 25% to 35%, and then the zeolite and expanded vermiculite particles (40 to 60 mesh) are mixed in a certain proportion and adhered to the surface of the treated polyvinyl chloride framework. The composite biological filler is prepared after being ventilated and dried; the composite biological filler is a combination of an inorganic filler and an organic filler, and the surface is rough, which shortens the time of microbial film hanging and improves the impact resistance of the microbial population. Although the composite biological filler is attached with inorganic filler zeolite and expanded vermiculite particles on the surface of the organic filler polyvinyl chloride framework, making it easy for microorganisms to hang on the film, it has little effect on the pressure drop of the filler, and is more suitable for the treatment of organic wastewater. When the organic waste gas is treated in the biological trickling filter device, its specific surface area is small, resulting in less biomass hanging on the membrane, and the stability of the surface composite material cannot be guaranteed. blocking problem.

A good biofiller should have the characteristics of large specific surface area, high porosity, favorable for exfoliation and renewal of aging biofilms, cheap and easy to obtain, and good support strength. Therefore, according to the current discharge characteristics of industrial organic waste gas and wastewater, research and development of efficient and suitable biological fillers will become a key step for the long-term efficient and stable operation of biological treatment devices for industrial organic waste gas and wastewater.

Whether it is electrode biofilm method or electro-Fenton technology, suitable biofillers are required, which can not only support biofilm well, but also have strong conductivity. In the previous electrochemical treatment of wastewater and waste gas, due to the low utilization rate of electrode materials, it is difficult to attach biofilms, which greatly reduces the degradation efficiency of organic pollutants. Therefore, it is extremely important to seek more suitable electrode materials.

Utility model content

Aiming at the pollution characteristics of current waste water and waste gas and the shortcomings of the existing biological technology, the utility model provides a combined biological filler of foamed nickel and iron carbon, which can greatly reduce the energy consumption of waste water and waste gas purification systems, and the process treatment process does not involve secondary pollution, and can fully improve the purification efficiency of refractory organic pollutants.

A combined biological filler of foamed nickel and iron carbon comprises foamed nickel, wherein the foamed nickel is coated with iron and carbon particles. The combined biological filler of nickel foam and iron-carbon particles used in waste water and waste gas purification treatment systems, including several nickel foams coated with iron-carbon particles and supported by iron needle-like mesh, in an electro-Fenton reactor It is piled up in a scattered state, with low bulk density, large specific surface area, high porosity, large biomass per unit volume, good sedimentation, strong electrical conductivity, low bulk density, low resistance coefficient, good support strength, and is conducive to the uniform flow of liquid fluids, etc. characteristic.

Preferably, the nickel foam is an ultra-thin continuous nickel foam, and the nickel foam is a three-dimensional network, which greatly increases the specific surface area of the nickel foam, the ability to produce H ₂ O ₂ , and is conducive to the uniformity of the liquid fluid. flow. Further preferably, the pore size of the foamed nickel is 0.5mm-1mm, the thickness is 1mm-2mm, and the geometric size is 15mm×15mm. The pore size and thickness of the nickel foam are limited to a suitable range, so that the size of the nickel foam is within a suitable range. Based on the size of the nickel foam, the size and shape of the iron-carbon particles are further limited, and iron needles are distributed on the surface of the iron-carbon particles. The foamed nickel is supported by the like network, so that the combined biological filler of the foamed nickel and iron carbon of the present invention has the advantages of large specific surface area, easy biofilm ^formation , good sedimentation, strong activity, strong conductivity, and the production of _H2O2 and _Fe2 ⁺ The ability is strong, which is conducive to the uniform flow of liquid fluids.

The iron-carbon particles are entities made of iron-carbon powder and are cylindrical. The cylindrical shape is roughly a cylinder, and some irregular cylinders are not excluded. The mesh is supported and wrapped in the nickel foam to enhance the strength and settleability of the nickel foam. The cylindrical iron-carbon particles have the characteristics of being easy to generate Fe ²⁺ , can effectively reduce the impedance caused by the transfer of substances and electrons in the reaction process, and have the characteristics of good sedimentation performance and strong electrical conductivity.

Preferably, the inner diameter of the iron-carbon particles is 10 mm-12 mm, and the height of the iron-carbon particles is 8 mm-10 mm. The iron needle-like mesh on the surface of the iron-carbon particles is made of iron, and is distributed in needle-like crosses, and its length is 1.5 mm to 2.5 mm. It has the characteristics of large specific surface area, easy attachment and growth of microorganisms, strong activity, which is conducive to the shedding and renewal of aging biofilms, and has the characteristics of good sedimentation performance, high current density and strong electrical conductivity.

Based on the combined biological filler of foamed nickel and iron carbon of the present invention, a preparation method of the combined biological filler of foamed nickel and iron carbon is provided. It is spherical, and the nickel foam is supported on the surface of the iron carbon particles by the iron needle mesh;

Among them, the nickel foam is prepared by electrodeposition technology, the nickel foam is a polyester polyurethane foam plastic with mechanical blasting opening, and the foam plastic is composed of a dodecahedron structural unit with a pentagonal window;

The iron-carbon particles are cylindrical iron-carbon particles composed of iron and carbon, which are continuously cooled in low-alloy high-strength molten steel.

Compared with the prior art, the utility model has the following advantages:

The preparation and application of the combined biological filler of foamed nickel and iron carbon of the utility model can not only effectively gather current, but also lower the impedance caused by the transfer of substances and electrons in the reaction process, and greatly enhance the electrical conductivity of the reactor system. It has large specific surface area and high porosity, is easy to biofilm, has large biomass per unit volume, and low bulk density, which can effectively improve the degradation efficiency of organic pollutants, and is especially suitable for electrode biofilm methods. By comparing the amount of H ₂ O ₂ catalytically produced by graphite, carbon fiber felt, foamed copper, and foamed nickel, Gu Zhenao et al. found that the amount of H ₂ O ₂ produced by nickel foam within ₁ h was _three times that of the rest of the electrodes. . Nickel foam has relatively good H ₂ O ₂ catalytic effect, and is especially suitable for electro-Fenton technology to treat organic wastewater.

Nickel foam has a three-dimensional network structure and has excellent cathode performance, but its texture is light and floats in water, which is not conducive to enhancing the conductivity of the reactor system, and it is not conducive to biological film formation. Therefore, the sedimentation of nickel foam is improved. and electrical conductivity are very important. The utility model mainly introduces the manufacturing method and advantages of a combined biological filler of foamed nickel and iron carbon, aiming to seek a more suitable biological filler. Therefore, in view of the current pollution characteristics of organic waste water and organic waste gas, research and development of efficient and suitable biological fillers will become a key step for the long-term efficient and stable operation of the refractory organic pollutant treatment device in waste water and waste gas.

The combined biological filler of foamed nickel and iron-carbon of the utility model adopts the combination of foamed nickel and iron-carbon particles with surface-distributed iron needle-like nets covered in the foamed nickel, the production process is relatively simple, and the required materials are cheap and easy to obtain. It has the advantages of stable properties and structure, large specific surface area, strong electrical conductivity, good sedimentation and high support strength. The combined biological filler of nickel foam and iron-carbon particles with iron needle-like nets distributed on the surface of the utility model can be used in the fields of organic waste water and waste gas that are difficult to biodegrade, and has great practical value.

The combined biological filler of foamed nickel and iron carbon of the utility model has the following advantages: 1) large specific surface area and high porosity, which can accommodate active substances to the maximum extent; 2) small bulk density, low airflow resistance coefficient, and uniform surface density 3) Large biomass per unit volume and high pollutant removal load; 4) High support strength, stable structure, not easy to be compacted, and good weldability; 5) It can ensure the uniform flow characteristics of liquid fluid, and is conducive to The shedding and renewal of the aging biofilm; 6) The current density is large and the electrical conductivity is strong; 7) The sedimentation performance is good, and the treatment process system is stable; 8) The ability to produce H ₂ O ₂ and Fe ²⁺ is strong.

The continuous nickel foam adopts the polyester polyurethane foam plastic with mechanical blasting and opening. deposition method. According to the electrodeposition method, it can be divided into electrodeposition method (wet method) and vapor deposition method (dry method). The electrodeposition method is divided into two forms: flat plating and vertical plating.

The continuous nickel foam filaments forming the foamed nickel mesh structure are all hollow bodies, the cross section is triangular, and the volume of the hollow microporous part accounts for 1.5% to 3.0% of the total porosity; the porosity of the obtained product under each condition is greater than 95.8%.

The combined biological filler of nickel foam and iron carbon of the utility model is suitable for the purification and treatment system of waste water and organic waste gas, and is especially suitable for the treatment of refractory organic waste water by electro-Fenton method. Therefore, the energy consumption of the electro-Fenton device can be greatly reduced, and the purification efficiency of the refractory organic matter can be fully improved. Therefore, the combined biological filler of nickel foam and iron-carbon with iron acicular network distributed on the surface has great application prospects in the field of refractory wastewater.

Description of drawings

FIG. 1 is a schematic structural diagram of the combined biological filler of nickel foam and iron carbon of the present invention.

Note in the drawings: iron carbon particles 1, nickel foam 2, iron needle mesh 3.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in FIG. 1 , the present invention provides a combined biological filler of nickel foam and iron carbon, including nickel foam 2 , and the nickel foam 2 is coated with iron carbon particles 1 . The combined biological filler of nickel foam and iron-carbon particles used in wastewater and waste gas purification treatment systems, including a number of nickel foams 2 coated with iron-carbon particles and supported by iron needle-like meshes 3, in electro-Fenton The reactor is stacked in a scattered state, with low bulk density, large specific surface area, high porosity, large biomass per unit volume, good sedimentation, strong electrical conductivity, low bulk density, low resistance coefficient, good support strength and is conducive to liquid fluids Uniform flow and other characteristics.

Claims (7)

1. the combined bio filler of a kind of nickel foam and iron carbon, including nickel foam (2), which is characterized in that the nickel foam (2) Inside it is coated with iron carbon particle (1).

2. the combined bio filler of a kind of nickel foam according to claim 1 and iron carbon, which is characterized in that the foam Nickel (2) is ultra-thin knitmesh type laminated structure.

3. the combined bio filler of a kind of nickel foam according to claim 1 and iron carbon, which is characterized in that the iron carbon Particle (1) matrix is cylindrical pellet, and appearance is covered with the needle-shaped net of irony (3).

4. the combined bio filler of a kind of nickel foam according to claim 3 and iron carbon, which is characterized in that the irony Needle-shaped net (3) uniform fold is in iron carbon particle (1) surface.

5. the combined bio filler of a kind of nickel foam according to claim 1 and iron carbon, which is characterized in that the foam Nickel (2) aperture is 0.5mm~1mm, and the nickel foam (2) is highly 1mm~2mm, and nickel foam (2) length is 15mm, institute Stating nickel foam (2) width is 15mm.

6. the combined bio filler of a kind of nickel foam according to claim 1 and iron carbon, which is characterized in that the iron carbon Particle (1) matrix is cylindrical pellet, and iron carbon particle (1) base diameter is 10mm~12mm, and the iron carbon particle (1) is high Degree is 8mm~10mm.

7. the combined bio filler of a kind of nickel foam according to claim 1 and iron carbon, which is characterized in that the iron carbon The needle-shaped net of irony (3) on particle (1) surface, material is irony, and with needle-shaped cross-distribution, the length is 1.5mm~2.5mm.