CN111013248A - Preparation method of carbon fiber filter plate - Google Patents
Preparation method of carbon fiber filter plate Download PDFInfo
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- CN111013248A CN111013248A CN201911363795.1A CN201911363795A CN111013248A CN 111013248 A CN111013248 A CN 111013248A CN 201911363795 A CN201911363795 A CN 201911363795A CN 111013248 A CN111013248 A CN 111013248A
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- carbon fiber
- fiber cloth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a preparation method of a carbon fiber filter plate, which comprises the following steps: weaving carbon fibers into carbon fiber cloth, immersing the carbon fiber cloth into ethylenediamine, and performing flow blowing in a fume hood; stacking the hardness plates, drilling uniformly-distributed vertical holes by using a water drill bit, coating epoxy resin, filling the columnar cores into the vertical holes, tiling the carbon fiber cloth, hot rolling, taking out the columnar cores, and washing; and (3) filling glass beads into two vertical holes of the porous hard plate with 3 carbon fibers, stacking the vertical holes upwards in sequence, ensuring that the vertical holes are aligned and the glass beads which are not filled are positioned at the top, and fixing the vertical holes by using fastening strips to obtain the carbon fiber porous hard plate. The carbon fiber cloth is fixed on the hard plate by using the epoxy resin, the carbon fiber has higher strength and can bear higher water pressure, so that the waste liquid is not required to be subjected to long-time standing precipitation in a precipitation tank, the carbon fiber cloth is directly subjected to pressure filtration by using the carbon fiber cloth, after the filter element is saturated, the buckle strip is detached, and the precipitation can be separated by performing ultrasonic treatment on each part, so that the carbon fiber cloth can be reused.
Description
Technical Field
The invention relates to the field of metallurgical waste liquid treatment, in particular to a preparation method of a carbon fiber filter plate.
Background
The hard-to-process gold concentrate containing arsenic and carbon adopts two-stage roasting acid making, acid leaching impurity removing and cyaniding gold extracting processes, mixed flue gas of arsenic trioxide, sulfur dioxide and the like is generated in the roasting process, acid-containing arsenic waste liquid is produced through electric precipitation, wet quenching arsenic removal and acid washing purification, and the purified sulfur dioxide flue gas is subjected to secondary conversion and secondary absorption to produce a sulfuric acid product. The method for treating the acidic arsenic-containing waste liquid mainly comprises a lime neutralization method, a lime and iron salt neutralization method, a high-efficiency vulcanization purification method, a microbial oxidation degradation method and the like, wherein the main principle of the lime precipitation method is as follows: adding lime with the arsenic molar quantity of 4-10 times into the wastewater, and adjusting the pH of the wastewater to be more than 12 to ensure that the As in the wastewater3+、As5+Insoluble calcium arsenate, calcium arsenite and other precipitates are formed with the added calcium, so that the arsenic content in the water is effectively reduced, and finally, the pH value of the wastewater is adjusted by adding acid and other methods, so that the wastewater meets the requirements of discharge or subsequent treatment; the main principle of the sulfide precipitation method is as follows: under acidic condition, using As of different valence statesm+Can be reacted with S2-Formation of insoluble precipitated As2Sm(ii) a The main principle of the calcium-iron salt combined arsenic removal method is as follows: pre-oxidizing the waste water, adding ferric salt, adjusting the pH value, and adding a calcium precipitator to form calcium-arsenic slag. The arsenic-containing solid waste obtained by a sulfide precipitation method and a calcium-iron salt combined arsenic removal method is easy to dissolve out, and hidden danger exists in open-air stockpiling. The waste slag produced by the traditional iron salt precipitation method can be stably stored, but has the precipitation speedLow viscosity, large viscosity of waste residue and the like. Therefore, how to reduce the amount of the arsenic-containing iron slag and improve the removal rate of arsenic is the key to the problem of treating the arsenic-containing wastewater. In any treatment method, the production and treatment costs are high, and the process flow is complicated.
Patent CN106517577A is a treatment process of acidic arsenic-containing wastewater, in which chlorate or/and perchlorate is used as oxidant to oxidize trivalent arsenic into pentavalent arsenic, and inorganic flocculant and organic flocculant are added successively to perform flocculation precipitation dearsenification. The method adopts the oxidant, adopts multi-stage oxidation treatment and flocculation, still increases the complexity of the process, causes high production cost, adopts an outward discharge mode to treat the treated wastewater, and does not realize the aims of emission reduction and cyclic utilization.
Usually, before dearsenization, the waste liquid containing flocculation precipitation is stood for a long time in a sedimentation tank, and after the precipitation is accumulated at the bottom of the tank, the supernatant and the precipitation are primarily separated. This type of pretreatment of the waste liquid is either large in floor space, time consuming, difficult to handle, difficult to control the selection of the supernatant and the specific area of the sediment, resulting in the presence of sediment in the supernatant or an excess of water in the sediment. The filtering method can avoid the problems, but the requirement on a filtering device is increased, firstly, the filtering device can bear higher water pressure, secondly, the filtering device can effectively intercept the sediment, thirdly, the intercepted sediment can be conveniently separated, and the regeneration performance is good.
Disclosure of Invention
The invention provides a preparation method of a carbon fiber filter plate, aiming at the problem that the requirement on equipment is higher when a filtration method is adopted to recover precipitates in metallurgical waste liquid.
The technical scheme for solving the technical problems is as follows: a preparation method of a carbon fiber filter plate comprises the following steps:
1) weaving carbon fibers into carbon fiber cloth, immersing the carbon fiber cloth into ethylenediamine for 3-5h, taking out the carbon fiber cloth, blowing the carbon fiber cloth in a fume hood by using nitrogen flow at 50 ℃ for 3-5min, and sealing and placing the carbon fiber cloth;
2) cutting a plurality of hardness plates to a required shape, piling up the hardness plates, drilling uniformly distributed vertical holes by using a water drilling drill bit, and reserving the drilled columnar core;
3) cutting the carbon fiber cloth soaked in the step 1) into a shape the same as that of the hardness plate, performing edge covering treatment, coating epoxy resin on the surface of the drilled hardness plate obtained in the step 2), keeping the coating surface upward, putting the columnar core into a vertical hole, then flatly laying the carbon fiber cloth soaked in the step 1), rolling for 3-5 times by using a hot roller at 70 ℃, taking out the columnar core after natural cooling, washing the carbon fiber cloth at the vertical hole by using a water gun, and airing to obtain the carbon fiber porous hardness plate;
4) and 3) filling glass beads into two vertical holes of the carbon fiber porous hard plates obtained in the step 3), stacking the three carbon fiber porous hard plates upwards in sequence after trowelling, ensuring that the vertical holes are aligned and the vertical holes which are not filled with the glass beads are uppermost, and fixing the vertical holes by using buckling strips to obtain the carbon fiber porous hard plates.
In the step 1), the carbon fiber is T700 or T800, the thickness of the carbon fiber cloth is 0.5-1.5mm, and the pore diameter is 80-120 μm; in the step 2), the hardness plate is a polytetrafluoroethylene plate, an acrylic plate or an aluminum plate, the thickness of the plate is 1-1.5cm, and the diameter of the vertical hole is 0.2-0.4 cm; in the step 4), the particle size of the glass beads is 150-200 μm.
The invention has the beneficial effects that: the carbon fiber cloth is fixed on the hard plate by using the epoxy resin, the carbon fiber has higher strength and can bear higher water pressure, so that the waste liquid is not required to be subjected to long-time standing precipitation in a precipitation tank, the carbon fiber cloth is directly subjected to pressure filtration by using the carbon fiber cloth, after the filter element is saturated, the buckle strip is detached, and the precipitation can be separated by performing ultrasonic treatment on each part, so that the carbon fiber cloth can be reused.
Drawings
FIG. 1 is a schematic structural view of the present invention; FIG. 2 is a cut-away view of the present invention; FIG. 3 is a sectional view of a carbon fiber porous hard sheet; each part is as follows:
1. the device comprises a hardness plate, 2 vertical holes, 3 carbon fiber cloth, 4 glass beads, 5 buckling strips.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
A preparation method of a carbon fiber filter plate comprises the following steps:
1) weaving the T700 carbon fiber into carbon fiber cloth 3 with the thickness of 0.5, controlling the aperture to be 80 mu m, immersing the carbon fiber cloth in ethylenediamine for 3h, taking out the carbon fiber cloth, blowing the carbon fiber cloth in a fume hood by using nitrogen flow at 50 ℃ for 3min, and sealing and placing the carbon fiber cloth;
2) cutting a plurality of polytetrafluoroethylene plates 1 with the plate thickness of 1cm to a required shape, piling up, drilling uniformly distributed vertical holes 2 by using a water drilling drill, keeping the diameter of each vertical hole 2 to be 0.2cm, and reserving the drilled columnar cores;
3) cutting the carbon fiber cloth 3 soaked in the step 1) into a shape the same as that of a hard plate, performing edge covering treatment, coating epoxy resin on the surface of the drilled hard plate obtained in the step 2), keeping the coating surface upward, placing a columnar core into a vertical hole 2, then flatly paving the carbon fiber cloth 3 soaked in the step 1), rolling for 3-5 times by using a hot roller at 70 ℃, taking out the columnar core after natural cooling, washing the carbon fiber cloth 3 at the vertical hole 2 by using a water gun, and airing to obtain a carbon fiber porous hard plate;
4) and 3) filling glass beads 4 with the granularity of 150 mu m into two vertical holes 2 of the carbon fiber porous hard plates obtained in the step 3), stacking the three vertical holes 2 of the carbon fiber porous hard plates upwards in sequence after trowelling, ensuring that the vertical holes 2 are aligned and the glass beads 4 which are not filled are positioned at the top, and fixing the carbon fiber porous hard plates by using buckling strips 5.
Example 2
A preparation method of a carbon fiber filter plate comprises the following steps:
1) weaving T800 carbon fibers into carbon fiber cloth 3 with the thickness of 1.5mm, controlling the aperture to be 120 mu m, immersing the carbon fiber cloth into ethylenediamine for 5h, taking out the carbon fiber cloth, blowing the carbon fiber cloth for 5min by using nitrogen flow at 50 ℃ in a fume hood, and sealing and placing the carbon fiber cloth;
2) cutting a plurality of aluminum plates 1 with the plate thickness of 1.5cm to a required shape, piling up, drilling uniformly distributed vertical holes 2 by using a water drilling drill, keeping the diameter of each vertical hole 2 to be 0.4cm, and reserving the drilled columnar core;
3) cutting the carbon fiber cloth 3 soaked in the step 1) into a shape the same as that of a hard plate, performing edge covering treatment, coating epoxy resin on the surface of the drilled hard plate obtained in the step 2), keeping the coating surface upward, placing a columnar core into a vertical hole 2, then flatly paving the carbon fiber cloth 3 soaked in the step 1), rolling for 3-5 times by using a hot roller at 70 ℃, taking out the columnar core after natural cooling, washing the carbon fiber cloth 3 at the vertical hole 2 by using a water gun, and airing to obtain a carbon fiber porous hard plate;
4) and 3) filling glass beads 4 with the granularity of 200 mu m into two vertical holes 2 of the carbon fiber porous hard plates obtained in the step 3), stacking the three vertical holes 2 of the carbon fiber porous hard plates upwards in sequence after trowelling, ensuring that the vertical holes 2 are aligned and the glass beads 4 which are not filled are positioned at the top, and fixing the carbon fiber porous hard plates by using buckling strips 5.
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 invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The preparation method of the carbon fiber filter plate is characterized by comprising the following steps of:
1) weaving carbon fibers into carbon fiber cloth, immersing the carbon fiber cloth into ethylenediamine for 3-5h, taking out the carbon fiber cloth, blowing the carbon fiber cloth in a fume hood by using nitrogen flow at 50 ℃ for 3-5min, and sealing and placing the carbon fiber cloth;
2) cutting a plurality of hardness plates to a required shape, piling up the hardness plates, drilling uniformly distributed vertical holes by using a water drilling drill bit, and reserving the drilled columnar core;
3) cutting the carbon fiber cloth soaked in the step 1) into a shape the same as that of the hardness plate, performing edge covering treatment, coating epoxy resin on the surface of the drilled hardness plate obtained in the step 2), keeping the coating surface upward, putting the columnar core into a vertical hole, then flatly laying the carbon fiber cloth soaked in the step 1), rolling for 3-5 times by using a hot roller at 70 ℃, taking out the columnar core after natural cooling, washing the carbon fiber cloth at the vertical hole by using a water gun, and airing to obtain the carbon fiber porous hardness plate;
4) and 3) filling glass beads into two vertical holes of the carbon fiber porous hard plates obtained in the step 3), stacking the three carbon fiber porous hard plates upwards in sequence after trowelling, ensuring that the vertical holes are aligned and the vertical holes which are not filled with the glass beads are uppermost, and fixing the vertical holes by using buckling strips to obtain the carbon fiber porous hard plates.
2. The method for preparing a carbon fiber filter plate according to claim 1, wherein in the step 1), the carbon fiber is T700 or T800, the thickness of the carbon fiber cloth is 0.5-1.5mm, and the pore diameter is 80-120 μm.
3. The method for manufacturing a carbon fiber filter plate according to claim 1, wherein the hard plate is a teflon plate, an acrylic plate or an aluminum plate in the step 2), the plate thickness is 1 to 1.5cm, and the diameter of the vertical hole is 0.2 to 0.4 cm.
4. The method for preparing a carbon fiber filter plate according to claim 1, wherein the particle size of the glass beads in step 4) is 150-200 μm.
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