CN114347625A - A kind of preparation method of oil-water separation felt - Google Patents

Abstract

The invention discloses a preparation method of an oil-water separation felt, wherein the oil-water separation felt comprises an oil-water separation layer and framework layers arranged on two sides of the oil-water separation layer; the oil-water separation layer is bonded with the framework layer through an adhesive; the oil-water separation layer comprises super absorbent fibers and viscose fibers; the preparation method comprises the following steps: preparing an oil-water separation layer: arranging the super absorbent fibers and the viscose fibers according to a set proportion, pre-opening, stirring and mixing, conveying to a cotton storage bin, and carding, lapping, needling to form and coiling; a compounding procedure: the oil-water separation layer is arranged between the two framework layers, and the roller temperature is 110-140 ℃ during the lamination. The super-absorbent fiber and the viscose fiber in the oil-water separation layer can absorb moisture in oil products, so that the moisture in an oil-water mixture is effectively separated. And the special felting needle is adopted to produce the oil-water separation layer, so that the damage to the fiber can be reduced, and the strength of the non-woven fabric can be improved.

Description

A kind of preparation method of oil-water separation felt

technical field

The invention relates to a preparation method of a composite non-woven fabric, in particular to a preparation method of an oil-water separation felt.

Background technique

Oil is a general term for liquid hydrophobic substances at room temperature, consisting of one or more liquid hydrocarbons. When the oil in the gas station is stored, moisture will penetrate, which will affect the quality of the oil. When the oil is mixed with water, the oil and water need to be separated. In the prior art, oil-water separators are often used to achieve this. The oil-water separator is after stirring, the oil is lighter than the water, and the oil floats on the upper layer to separate the oil and water. The oil and water cannot be completely separated, and the oil and water cannot be completely separated.

In the Chinese invention patent application with the publication number of CN106582609A and the title of an oil-water separation felt, it is mentioned that the superabsorbent fibers are used to absorb the water in the oil. The non-woven fabric has large voids, which can allow most of the liquid to pass through, and can play the role of filtration, but the patent application does not disclose how to prepare such an oil-water separation felt. How to prepare a fast oil-water separation felt to separate the water in the oil can effectively improve the quality of the oil, which has become a problem to be solved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for preparing an oil-water separation felt and a method for preparing an oil-water separation felt, so that the prepared oil-water separation felt has a good oil-water separation effect.

For solving the above-mentioned technical problems, the purpose of the present invention is to realize like this:

The present invention relates to a method for preparing an oil-water separation felt. The oil-water separation felt comprises an oil-water separation layer and a skeleton layer disposed on both sides of the oil-water separation layer; the oil-water separation layer and the skeleton layer are bonded by an adhesive. ; Include superabsorbent fibers and viscose fibers in the oil-water separation layer;

The preparation method comprises the following steps:

S1. Preparation of oil-water separation layer: after pre-opening superabsorbent fibers and viscose fibers according to a set ratio, and then stirring and mixing for a set time, transported to the cotton storage bin, and then combed by a carding machine to form a net and lay a net , Acupuncture into rolls; upper acupuncture is used when acupuncture is used, and the acupuncture density is between 100-150 times/cm2;

S2. Compounding process: Coat one side of the skeleton layer with adhesive, place the oil-water separation layer between the two skeleton layers, and set the temperature of the upper and lower rolls of the hot rolling mill between 110-140°C during lamination .

On the basis of the above scheme and as a preferred scheme of the above scheme: the distance L1 from the needle tip to the barb in the needle used during acupuncture is 6.36mm, the barb depth J is 0.04mm, the protruding height K is 0mm, the hook The distance T between the spines is 6.36 mm.

On the basis of the above scheme and as a preferred scheme of the above scheme: the ratio of the superabsorbent fiber to the viscose fiber is 3-7:7-3.

On the basis of the above scheme and as the preferred scheme of the above scheme: when carding, the primary cylinder in the carding machine is 30Hz, the middle doffer is 35Hz, the main cylinder is 26Hz, the work roll is 30Hz, and the linear speed of the doffer is 53m/min, The linear speed of the front random roller is 32.21m/min, the linear speed of the rear random roller is 20.71m/min, and the linear speed of the lower leather curtain is 34.4m/min.

On the basis of the above scheme and as a preferred scheme of the above scheme: there is also a leveler before the carding machine, and the leveling speed of the leveler is 0.74m/min.

On the basis of the above-mentioned scheme and as the preferred scheme of the above-mentioned scheme: the front cord speed of the web laying machine is 50.91m/min, the number of laying layers is 20 layers, and the speed of the web-forming curtain is 2.33±0.3m /min, the overlap width is -50mm.

On the basis of the above scheme and as the preferred scheme of the above scheme: acupuncture includes pre-punching, second acupuncture, third acupuncture, fourth acupuncture, fifth acupuncture and sixth acupuncture ; During the pre-punching, the feeding speed is 2.68m/min, the discharging speed is 3.23m/min, the acupuncture depth is 12±1mm, and the step size is 5.193±0.5mm; the feeding speed of the second acupuncture and the discharge speed is 3.14m/min; the feed speed and discharge speed of the third acupuncture are 3.19m/min; the feed speed and discharge speed of the fourth acupuncture are 3.23m/min; the fifth The feeding speed and the discharging speed of the acupuncture pass are 3.16m/min; the feeding speed and the discharging speed of the sixth needling pass are 3.12m/min.

On the basis of the above scheme and as a preferred scheme of the above scheme: the pre-acupuncture uses 42 needles of veneer, the second acupuncture, the third acupuncture, and the sixth acupuncture use 80 Needle single plate; 150 needle double plate used for the fourth and fifth acupuncture.

The beneficial effects of the present invention are: the preparation method of the oil-water separation felt involved in the present invention, the prepared oil-water separation felt, the superabsorbent fibers and viscose fibers in the oil-water separation layer can absorb the water in the oil, so that the oil and water can be absorbed. The moisture in the mixture is effectively separated. And the use of special needles to produce the oil-water separation layer can reduce the damage to the fibers and improve the strength of the non-woven fabric.

Description of drawings

Fig. 1 is the structural representation of the oil-water separation felt prepared by the present invention;

Fig. 2 is the schematic diagram of compound operation;

Fig. 3 is the structural representation of the lancet used by the acupuncture machine of the present invention;

Fig. 4 is the partial structure schematic diagram of the puncture needle used in the present invention;

Fig. 5 is the structural representation at the position of the needle tip of the puncture needle in the prior art;

Fig. 6 is a schematic diagram of the structure at the protruding position of the puncturing needle in the prior art.

The symbols in the figure are explained as follows: 1-skeleton layer; 2-oil-water separation layer; 3-roller.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

The present invention will be described in detail with reference to FIGS. 1 to 6 . The present invention relates to a method for preparing an oil-water separation felt. The oil-water separation felt comprises an oil-water separation layer and a skeleton layer disposed on both sides of the oil-water separation layer; the oil-water separation layer and the skeleton layer are thermally bonded by an adhesive. combined; the oil-water separation layer includes superabsorbent fibers and viscose fibers.

The oil-water separation felt involved in the present invention has a sandwich structure, and the skeleton layers used on both sides are common polyester non-woven fabrics. The polyester non-woven fabric is used as the skeleton layer, which is convenient for folding and molding of the composite product when it is made into a filter element. The oil-water separation layer used in the middle layer adopts super absorbent fiber. Super absorbent fiber is called super absorbent fiber in English, or SAF for short. Super absorbent fiber is a special functional fiber developed after super absorbent resin. The macromolecule structure of superabsorbent fibers includes main chain skeleton, water-absorbing groups and cross-linking groups, etc., and forms a three-dimensional network structure through cross-linking technology, which has excellent water absorption capacity, liquid retention performance and swelling characteristics. When the oil-water mixture passes through the oil-water separation felt, the oil in the oil-water mixture directly passes through the oil-water separation felt, and the water in the oil-water mixture contacts the superabsorbent fibers in the middle layer and is absorbed, thereby realizing the separation of oil and water in the oil-water mixture.

When the superabsorbent fiber absorbs enough water, it will appear gelatinous. If the filter element is not replaced for a long time, the superabsorbent resin may enter the oil. In the present invention, viscose fiber is added to the superabsorbent fiber as a supporting fiber. The viscose fiber will not become gelatinous after absorbing water, but will still be in the form of a fiber network. When the superabsorbent fiber absorbs water and becomes gelatinous, it can keep the superabsorbent resin well and prevent the superabsorbent resin from entering the oil. In the product, it affects the quality of the oil. And viscose fiber has good water absorption properties, which can reduce the amount of superabsorbent resin.

In addition, the polyester non-woven fabric serves as the skeleton layer 1 and maintains the shape of the oil-water separation felt. Secondly, viscose fiber is used as the support fiber, and the support fiber acts as a skeleton in the middle layer to support, so that the oil-water separation felt will not collapse after absorbing water, and the effect of efficient separation of oil and water is achieved.

Further, the ratio of superabsorbent fibers to viscose fibers in the oil-water separation layer 2 is 3-7:7-3, specifically, 5:5 in the present invention.

The preparation method of a kind of oil-water separation felt involved in the present invention comprises the following steps:

S1. Preparation of oil-water separation layer: after pre-opening superabsorbent fibers and viscose fibers according to a set ratio, and then stirring and mixing for a set time, transported to the cotton storage bin, and then combed by a carding machine to form a net and lay a net , Acupuncture into rolls; upper acupuncture is used when acupuncture is used, and the acupuncture density is between 100-150 times/cm ² .

Due to the poor recovery and dispersibility of viscose fibers, in order to improve the uniformity of superabsorbent fibers and viscose fibers. After the superabsorbent fibers and viscose fibers are arranged and grabbed according to the set ratio, they are mixed and stirred for 100 s. And then transported to the cotton storage bin. The gram weight of the oil-water separation layer 2 is adjusted according to the actual needs of the oil-water separation felt.

The superabsorbent fiber used is white, the fiber length is 50±2mm, the moisture content is 13.5-16%, and the fineness is 10 dtex. The 15 minute free expansion rate (0.9% saline) was 50 grams/gram. The 15-minute free swelling rate (DM) is greater than 155 g/g. The water absorption (0.9% saline) at 0.3 lb/in load was 17 g/g and the water absorption (DM) at 0.3 lb/in load was 97 g/g. Retention force at 0.5 lb/in (0.9% saline) is 45 g/g. DM is demineralized water.

S2. Compounding process: Coat one side of the skeleton layer with adhesive, place the oil-water separation layer between the two skeleton layers, and set the temperature of the upper and lower rolls of the hot rolling mill between 110-140°C during lamination , after the adhesive on the surface of the polyester non-woven fabric is melted by the humidity on the surface of the roller, and the skeleton layer 1 and the oil-water separation layer 2 are combined by the pressure of the roller.

Due to the poor strength of viscose fiber and superabsorbent fiber, in order to reduce the damage to the fiber during acupuncture, a special felting needle is used for acupuncture production, and the interlacing force of the fiber is improved by increasing the depth of the needling. Further, the distance L1 from the needle tip to the barb in the needle used in acupuncture is 6.36mm, the barb depth J is 0.04mm, the spur height K is 0mm, and the distance T between the barbs is 6.36mm, The overall length E is 90.7mm. In a conventional needle, the distance L1 from the needle tip to the barb is 6.35 mm, the barb depth J is 0.1 mm, the spur height K is 0.5 mm, the distance T between the barbs is 2.1 mm, and the total length E is 88.9 mm. And by testing the breaking strength of the non-woven fabric prepared by the two kinds of felting needles, the strength of the non-woven fabric prepared by the felting needle used in the present invention is increased by 12.6%.

Further, during carding, the primary cylinder of the carding machine is 30Hz, the middle doffer is 35Hz, the main cylinder is 26Hz, the work roll is 30Hz, the linear speed of the doffer is 53m/min, and the linear speed of the front messy roller is 32.21m/min. The linear speed of the rear random roller was 20.71 m/min, and the linear speed of the lower leather curtain was 34.4 m/min. There is also a leveler before the carding machine, said leveler having a leveling speed of 0.74 m/min. In the present invention, the diameter of the primary cylinder is 850 mm, the diameter of the middle doffer is 492 mm, the diameter of the main cylinder is 1230 mm, and the diameter of the work roll is 165 mm.

Further, the front cord speed of the web laying machine is 50.91 m/min, the number of laying layers is 20, the web curtain speed is 2.33±0.3 m/min, and the overlap width is -50 mm.

Further, the acupuncture includes pre-punching, the second acupuncture, the third acupuncture, the fourth acupuncture, the fifth acupuncture and the sixth acupuncture; the feeding speed during the pre-punching is 2.68 m/min, the discharge speed is 3.23m/min, the needling depth is 12±1mm, and the step size is 5.193±0.5mm; the feeding speed and discharge speed of the second needling are 3.14m/min; The feeding speed and the discharging speed of the third acupuncture are 3.19m/min; the feeding speed and the discharging speed of the fourth needling are 3.23m/min; the feeding speed and the discharging speed of the fifth needling are is 3.16m/min; the feeding speed and the discharging speed of the sixth acupuncture are 3.12m/min.

Further, the 42-needle veneer used in the pre-acupuncture, the 80-needle veneer used in the second acupuncture, the third acupuncture, and the sixth acupuncture; The five-course acupuncture uses a 150-needle double plate.

The oil-water separation felt prepared by the present invention is tested. 500ml of water was added to the oil-water mixture used, that is, 2L of oil. Under the condition of 20 °C, the real machine of the fuel dispenser is used to simulate the test. The oil-water mixture is filtered through an oil-water separation felt, and the oil-water mixture still contains 5-10ml of water at 10s, and the water content of the oil-water mixture is less than 1ml after 20s. It can be seen that the oil-water separation felt prepared by the present invention has a good oil separation effect. Specifically, the skeleton layer on one side of the oil-water separation felt used is 110 grams per square meter, the skeleton layer on the other side is 30 grams per square meter, and the weight of the oil-water separation layer in the middle is 470 grams per square meter.

For the oil-water separation felt, the impurity interception test was carried out. The measured temperature was 20 ° C. The stone powder particles were placed in 15 liters of bearing oil, and the actual operation of the gas station oil machine was used to simulate the operation. Record the pressure once every 2 minutes. The recorded pressure is the pressure value of the pipeline when the oil is circulated by the dispenser pump. The set pressure value is less than 0.05MPa. After adding impurities, the pressure of the pipeline in the dispenser will increase, and the corresponding flow rate will become lower. After the oil passes through the oil-water separation felt, the pressure of the oil on the pipeline is equal to the pressure of the normal oil on the pipeline, and there is not much change, which proves that the flow rate of the filtered oil in the pipeline does not change significantly. big change. After testing, the pressure of the bearing oil without impurities on the pipeline is 0.034MPa, the pressure of the bearing oil after adding impurities to the pipeline is 0.062MPa, and the pressure of the bearing oil on the pipeline after filtering is 0.036MPa, it can be seen from some , the filtered bearing oil has little change in the pressure of the pipeline and can be used normally.

The pure water blocking test was carried out on the oil-water separation felt. The temperature of the pure water tested was 0 °C. Under the pressure of 0.35MPa with the oil-water separation felt, the filter element prepared by the oil-water separation felt was passed through the oil-water separation felt. The amount of water flushed out is less than 2000ml, specifically 1853ml. Under high pressure conditions, it takes a certain time for the oil-water separation felt to absorb water and expand. After the filter element absorbs water and expands, pure water cannot pass through. The initial water in the past is less than 2000ml, which can ensure that water will not be added to the car through the refueling gun.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (8)

1. a preparation method of an oil-water separation felt, is characterized in that, the oil-water separation felt comprises an oil-water separation layer and a skeleton layer arranged on both sides of the oil-water separation layer; the oil-water separation layer and the skeleton layer are adhered by an adhesive. combined; the oil-water separation layer includes superabsorbent fibers and viscose fibers; The preparation method comprises the following steps: S1. Preparation of oil-water separation layer: after pre-opening superabsorbent fibers and viscose fibers according to a set ratio, and then stirring and mixing for a set time, transported to the cotton storage bin, and then combed by a carding machine to form a net and lay a net , Acupuncture into rolls; use upper acupuncture during acupuncture, and the acupuncture density is between 100-150 times/ ^cm2 ; S2. Compounding process: Coat one side of the skeleton layer with adhesive, place the oil-water separation layer between the two skeleton layers, and set the temperature of the upper and lower rolls of the hot rolling mill between 110-140°C during lamination . 2. the preparation method of a kind of oil-water separation felt according to claim 1, is characterized in that, the distance L1 from the needle tip to the barb in the needle used during needling is 6.36mm, and the barb depth J is 0.04mm, so the The spur height K is 0mm, and the distance T between the barbs is 6.36mm. 3 . The method for preparing an oil-water separation felt according to claim 1 , wherein the ratio of the superabsorbent fiber to the viscose fiber is 3-7:7-3. 4 . 4. the preparation method of a kind of oil-water separation felt according to claim 1, is characterized in that, during carding, the middle primary cylinder of the carding machine is 30Hz, the middle doffer is 35Hz, the main cylinder is 26Hz, the work roll is 30Hz, and the doffer is 30Hz. The line speed is 53m/min, the linear speed of the front random roller is 32.21m/min, the linear speed of the rear random roller is 20.71m/min, and the linear speed of the lower leather curtain is 34.4m/min. 5 . The method for preparing an oil-water separation felt according to claim 1 , wherein a leveler is provided before the carding machine, and the leveling speed of the leveler is 0.74 m/min. 6 . 6. the preparation method of a kind of oil-water separation felt according to claim 1, is characterized in that, the front cord speed of the net laying machine is 50.91m/min when laying the net, and the number of laying layers is 20 layers, and the net is formed. The curtain speed is 2.33±0.3m/min, and the overlap width is -50mm. 7. the preparation method of a kind of oil-water separation felt according to claim 1, is characterized in that, comprises pre-punching, second acupuncture, third acupuncture, fourth acupuncture, fifth acupuncture during acupuncture Acupuncture and sixth acupuncture; during the pre-punching, the feeding speed is 2.68m/min, the discharging speed is 3.23m/min, the needling depth is 12±1mm, and the step size is 5.193±0.5mm; The feeding and discharging speed of the second acupuncture is 3.14m/min; the feeding and discharging speed of the third needling is 3.19m/min; the feeding and discharging speed of the fourth acupuncture is 3.23m/min; the feeding speed and the discharging speed of the fifth acupuncture are 3.16m/min; the feeding speed and the discharging speed of the sixth needling are 3.12m/min. 8. the preparation method of a kind of oil-water separation felt according to claim 7, is characterized in that, what is used in described pre-needling is 42-needle veneer, the second needling, the third needling, the sixth needling The 80-needle veneer was used in the first acupuncture; the 150-needle double plate was used in the fourth and fifth acupuncture.

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