CN211283859U

CN211283859U - Modified carbon fiber filler for sewage treatment

Info

Publication number: CN211283859U
Application number: CN201921985289.1U
Authority: CN
Inventors: 高贵平
Original assignee: Guizhou Tongyong Water Conservancy Technology Development Co ltd
Current assignee: Guizhou Tongyong Water Conservancy Technology Development Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-08-18
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a sewage treatment modified carbon fiber filler, including mounting (1) and filler bundle (2), mounting (1) form by the iron wire coiling, filler bundle (2) constitute by novel polyacrylonitrile base modified carbon fiber, filler bundle (2) are connected on mounting (1). The utility model relates to an utilize Polyacrylonitrile (PAN) base modified carbon fiber to carry out novel filler of handling to sewage, have the low price, with low costs, long service life, characteristics that sewage purification effect is very good can effectively get rid of the colour of waste water, smell etc. still can get rid of the difficult degradation material simultaneously, and the good oxygen technology ammonia nitrogen clearance of cooperation is greater than 90% to make sewage become clear, colorless, tasteless, the specially adapted sewage purification.

Description

Modified carbon fiber filler for sewage treatment

Technical Field

The utility model relates to a filler that sewage treatment used, especially a sewage treatment modified carbon fiber filler belongs to sewage treatment technical field.

Background

The filler is a carrier of a place where microorganisms inhabit and a biological membrane, has very important function in sewage treatment, and the structure, the material and the specific surface area of the filler are directly related to the size of the place where the microorganisms inhabit, so that the quality of the purified water function of the filler is influenced. The existing sewage treatment filler has a complex structure, is made of hydroformylation vinylon, PE or PP, has a small specific surface, is low in adsorption rate, is not ideal in sewage purification effect, is short in service life, and is difficult to meet the actual use requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a modified carbon fiber filler for sewage treatment with simple structure, good sewage purification effect and long service life, thereby overcoming the defects of the prior art.

In order to solve the technical problem, the technical scheme of the utility model as follows:

the utility model provides a sewage treatment modified carbon fiber filler, includes mounting and filler bundle, the mounting form by the iron wire coiling, filler bundle constitute by many novel polyacrylonitrile base modified carbon fiber, filler bundle connects on the mounting.

As a preferred scheme, the tail end of the fixing piece is also provided with a circular hanging ring.

As a preferred scheme, the fixing piece is spirally wound by iron wires, and the filler bundle is in an bionic grass shape.

The novel polyacrylonitrile-based modified carbon fiber is obtained by performing surface modification treatment on polyacrylonitrile carbon fiber, and the preparation process is as follows:

(1) pre-oxidation treatment: carrying out pre-oxidation treatment on polyacrylonitrile fibers in a six-temperature-zone pre-oxidation furnace, wherein the selected polyacrylonitrile fibers are prepared by binary polymerization or ternary polymerization reaction and wet spinning or dry-spray wet spinning technology, the temperature of each temperature zone in the six-temperature-zone pre-oxidation furnace is 150 ℃, 180 ℃, 210 ℃, 240 ℃, 250 ℃ and 260 ℃, and the pre-oxidation treatment time is 120 min;

(2) carbonizing treatment: carbonizing the pre-oxidized polyacrylonitrile fiber in a four-temperature-zone carbonization furnace, wherein the temperature of each temperature zone in the four-temperature-zone carbonization furnace is 600 ℃, 800 ℃, 1000 ℃ and 1100 ℃, and the carbonizing treatment time is 10 min;

(3) surface activation treatment: surface activating the carbonized fiber by active modification method for 5min to obtain novel polyacrylonitrile-based modified carbon fiber with specific surface area greater than 1000m²/g。

The utility model has the advantages that: compared with the prior art, the utility model relates to an utilize novel Polyacrylonitrile (PAN) base modified carbon fiber to carry out novel filler of handling to sewage, its mounting is formed by the iron wire coiling, not only the low price, and is with low costs, and long service life, novel polyacrylonitrile base modified carbon fiber has little electrolytic capability with the mounting union coupling of iron simultaneously, it is little electrolytic to get rid of the chroma and has obvious effect, because the new ecology ferrous ion that electrode reaction produced has stronger reducing power, can make some organic matters look gene nitryl-NO 2, nitroso-NO reduction becomes amino-NH 2, the biodegradability of other amino organic matters is also obviously higher than nitro organic matters. The nascent divalent iron ions can also open double bonds of some unsaturated chromophoric groups (such as hydroxyl-COOH, azo-N = N-), destroy the chromophoric groups to remove chroma, and decompose part of nondegradable cyclic and long-chain organic matters into biodegradable small-molecular organic matters to improve biodegradability. In addition, divalent and trivalent iron ions are good flocculants, particularly, the newly generated divalent iron ions have higher adsorption flocculation activity, the pH value of the wastewater is adjusted to enable the iron ions to become flocculent precipitates of hydroxides, suspended or colloidal micro particles and organic polymers in the wastewater are adsorbed, the chromaticity of the wastewater is further reduced, and meanwhile, part of organic pollutants are removed to purify the wastewater.

The utility model discloses use novel polyacrylonitrile base modified carbon fiber as the filler bundle, have high porosity, high adsorption capacity, easily hang the advantage of membrane, sewage purification effect is very good. The novel Polyacrylonitrile (PAN) -based modified carbon fiber obtained by performing surface modification on Polyacrylonitrile (PAN) carbon fiber is an excellent novel microorganism immobilization carrier which is good in biocompatibility, high in immobilization speed, large in immobilization amount, resistant to microbial decomposition and chemical corrosion and strong in regeneration capacity, has the advantages of being excellent in compatibility, large in specific surface area, high in adsorption rate, high in desorption performance, large in treatment capacity, long in service cycle and the like, and also has good wettability and bacterium carrying capacity, a habitat can be provided for microorganisms under the condition that air is not blown in, and the microorganisms can be decomposed by taking soluble organic matters in water as food materials, so that wastewater is purified, and the novel Polyacrylonitrile (PAN) -based modified carbon fiber is particularly suitable for sewage purification.

The good or bad to a great extent of sewage treatment effect depends on material surface structure, compares with other fillers as sewage treatment, the utility model discloses a novel polyacrylonitrile base modified carbon fiber has high porosity, high adsorption capacity, easily hangs the advantage of membrane, mainly embodies following several:

(1) the specific surface area of the material is more than 1000m²And g, the sewage purification effect is high. The special form of the composite material has huge specific surface area, abundant micropores and various functional groups, so the composite material has higher adsorbability, can effectively remove the color, smell and the like of wastewater, can also remove refractory substances, and has an ammonia nitrogen removal rate of more than 90 percent by matching with an aerobic process, thereby enabling the sewage to be clear, colorless and tasteless.

(2) The microorganism is fast in biofilm formation, and the aged biofilm is easy to fall off. The novel polyacrylonitrile-based modified carbon fiber is not easy to pulverize, cannot become loose or is excessively dense under the vibration condition, and the biofilm formation speed is high due to the form of the bionic grass, so that the biofilm formation can be completed within 3 days, the weight of the biofilm reaches 1.556g of dry weight, and the average biofilm formation efficiency reaches 0.732g of biofilm/g of carrier. The microorganisms attached to the biological membrane take organic pollutants as energy sources to degrade the organic pollutants in the water body through the metabolism of the microorganisms, and the biological phase on the biological membrane is stable.

(3) The unit dosage is less, the price is cheap, the engineering investment is far lower than the national standard, and the economic advantage is obvious. From the aspect of treatment cost, the cost for treating 1gCOD is 0.2 yuan, and compared with the traditional sewage treatment filler (the cost for 1gCOD is 1-2 yuan), the filler has the absolute cost performance advantage; from the aspect of engineering investment, the material treats static water engineering investmentIs 200 to 300 yuan/m³The treatment dynamic is 300-400 yuan/m³The high concentration wastewater is treated at 500-600 yuan/m³The investment is 600-900 yuan/m lower than that of the national development and transformation commission on the purified water treatment project³The standard of (2).

(4) The biological affinity, the biocompatibility are good, and the oxygenation efficiency is high. The microorganism is fixed on the novel polyacrylonitrile-based modified carbon fiber filler, so that the decomposition function of the microorganism is enhanced. The novel polyacrylonitrile-based modified carbon fiber filler has repeated segmentation and blocking effects on bubbles, so that the concentration of dissolved oxygen in wastewater is increased, and the conversion among microorganisms, organic matters and dissolved oxygen is enhanced.

(5) High stability, light weight, high mechanical strength, long service life and convenient installation and maintenance. The novel polyacrylonitrile-based modified carbon fiber filler has the characteristics of high strength, acid resistance, alkali resistance, oxidation resistance, difficult aging and the like, and is firm and durable, less in replacement times, long in service life, very convenient to install and long in service life of more than 20 years.

Drawings

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

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Detailed Description

Example 1:

the working principle is as follows: as shown in figure 1, the modified carbon fiber filler for sewage treatment comprises a fixing piece 1 and a filler bundle 2, wherein the fixing piece 1 is formed by winding iron wires into a spiral shape, and the filler bundle 2 is formed by winding a plurality of carbon fiber fillers with specific surface areas larger than 1000m²The novel polyacrylonitrile-based modified carbon fiber is characterized by comprising a whole filler bundle 2, wherein the whole filler bundle is connected to a fixing piece 1 and is in a shape of bionic grass. In order to facilitate hanging, a circular hanging ring 3 is arranged at the tail end of the fixing piece 1.

The novel polyacrylonitrile-based modified carbon fiber used in the patent is obtained by performing surface modification treatment on polyacrylonitrile carbon fiber, and the preparation process is as follows:

(1) pre-oxidation treatment: carrying out pre-oxidation treatment on polyacrylonitrile fibers in a six-temperature-zone pre-oxidation furnace, wherein the selected polyacrylonitrile fibers are obtained by binary polymerization or ternary polymerization reaction and wet spinning or dry-jet wet spinning technology, the temperature of each temperature zone in the six-temperature-zone pre-oxidation furnace is 150 ℃, 180 ℃, 210 ℃, 240 ℃, 250 ℃ and 260 ℃, and the pre-oxidation treatment time is 120 min.

(2) Carbonizing treatment: carbonizing the pre-oxidized polyacrylonitrile fiber in a four-temperature-zone carbonization furnace, wherein the temperature of each temperature zone in the four-temperature-zone carbonization furnace is 600 ℃, 800 ℃, 1000 ℃ and 1100 ℃, and the carbonizing treatment time is 10 min.

(3) Surface activation treatment: and carrying out surface activation treatment on the carbonized fiber for 5min by an active modification method to prepare the novel polyacrylonitrile-based modified carbon fiber.

The activity modification method in the step (3) comprises the following steps: taking a graphite plate as an anode and polyacrylonitrile fibers prepared in the step (2) as a cathode, and carrying out active treatment on the polyacrylonitrile fibers in an electrified state in an electrolyte solution, wherein the current density is 0-30A/m². Wherein the electrolyte solution is an acidic electrolyte or an alkaline electrolyte or a neutral electrolyte, and the acidic electrolyte is any one of phosphoric acid, nitric acid, sulfuric acid and boric acid; the alkaline electrolyte is any one of sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, barium hydroxide, potassium phosphate, monopotassium phosphate, potassium dihydrogen phosphate, sodium phosphate and sodium dihydrogen phosphate; the neutral electrolyte is any one of ammonium phosphate, ammonium carbonate, ammonium bicarbonate, ammonium nitrate, ammonium sulfate and ammonium persulfate.

The embodiments of the present invention are not limited to the above embodiments, and various changes made without departing from the spirit and scope of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a sewage treatment modified carbon fiber filler, includes mounting (1) and filler bundle (2), its characterized in that: the fixing piece (1) is formed by winding iron wires, the filler bundle (2) is composed of novel polyacrylonitrile-based modified carbon fibers, and the filler bundle (2) is connected to the fixing piece (1).

2. The sewage treatment modified carbon fiber filler according to claim 1, wherein: the tail end of the fixing piece (1) is provided with a circular hanging ring (3).

3. The sewage treatment modified carbon fiber filler according to claim 1, wherein: the fixing piece (1) is wound by iron wires into a spiral shape, and the filler bundle (2) is in an bionic grass shape.