CN103952853A - X-shaped fiber weaving method suitable for oil-water separation - Google Patents
X-shaped fiber weaving method suitable for oil-water separation Download PDFInfo
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- CN103952853A CN103952853A CN201410211202.0A CN201410211202A CN103952853A CN 103952853 A CN103952853 A CN 103952853A CN 201410211202 A CN201410211202 A CN 201410211202A CN 103952853 A CN103952853 A CN 103952853A
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Abstract
The invention relates to an X-shaped fiber weaving method suitable for oil-water separation. Hydrophilic and oleophobic fibers and oleophylic and hydrophobic fibers are woven by an X-shaped weaving mode; requirements of different oil-water separation processes are met by adjusting angles of the hydrophilic and oleophobic fibers and the oleophylic and hydrophobic fibers. The weaving method is simple, can meet requirements on oil product water removal or sewage oil removal in different occasions and can be widely applied to oil-water separation processes of all industries.
Description
Technical field
The invention belongs to the oily water separation technique of petrochemical industry, field of Environment Protection, be specifically related to a kind of fibrage method that is applicable to water-oil separating.
Background technology
There is a large amount of oil water separation processes in the fields such as petrochemical industry, environmental protection, Coal Chemical Industry, the physical technique of water-oil separating at present mainly contains the methods such as gravitational settling, cyclonic separation, coalescence filtration, film separation.For gravitational settling, mainly can remove oil slick in sewage or the free state water in oil product, particle diameter is greater than free oil droplet or the water droplet of 100 μ m, to effective separated removal of the dispersed oil droplets (water droplet) below 100 μ m; Cyclone separation process is applicable to the quick removal process containing a large amount of (oil) water, can not be effectively separated to the following oil droplet of 15 μ m (water droplet) and emulsification water droplet, because potential energy being converted into rotation function, carry out separation, and energy consumption is relatively high; Coalescence filtration carries out separation by permeability, and accommodation is narrower, and factory application process exists short problem in service life, and same film separation also exists not long problem of easy pollution, service life, and each technology is only applicable to specific process.
Therefore this area is in the urgent need to the oily water separation technique that development cost is low, simple to operate, energy consumption is low and efficiency is high, to enrich the choice of technology of oil water separation process.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the invention provides a kind of X-type fibrage method that is applicable to water-oil separating, concrete technical scheme is as follows:
An X-type fibrage method that is applicable to water-oil separating, described fiber comprises hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber, described X-type fibrage method is as follows:
(1) described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber are carried out to x-shape interlock braiding;
(2), when being applied to sewage degrease process, the weaving direction of described hydrophilic oleophobic property fiber is consistent with the flow direction of described profit;
When the oil droplet size in described sewage is 0.1～15 μ m, the braid angle of described lipophilic-hydrophobic property fiber and hydrophilic oleophobic property fiber is for 15 degree are to 40 degree in the counterclockwise direction, and now the linear velocity of described sewage is less than or equal to 0.02m/s;
When the oil droplet size in described sewage is 15～50 μ m, the braid angle of described lipophilic-hydrophobic property fiber and hydrophilic oleophobic property fiber is for 40 degree are to 70 degree in the counterclockwise direction, and now the linear velocity of described sewage is less than or equal to 0.05m/s.
The inventor is through the discovery that studies for a long period of time, when lipophilic-hydrophobic property fiber and horizontal line angle are 15 degree to 40 degree (counterclockwise), and when the linear velocity of drainage flow is not more than 0.02m/s, to particle diameter in sewage, be that 0.1～15 μ m oil droplet has efficient separative efficiency, because of the hydrophilic oleophobic property fiber angle of lipophilic-hydrophobic property fiber and level less, particle diameter is the Nodes that the less oil droplet of 0.1～15 μ m moves to two fibers, be subject to oleophilic drainage and hydrophilic oleophobic polarity active force, oil droplet is subject to the power that pulls of oleophilic drainage fiber, and angle hour when horizontal displacement distance equates oil droplet loading process longer, more easily separated, otherwise, when if angle is large or drainage flow linear velocity is too fast, oil droplet because of loading process short, and it is not easily separated, as shown in Figure 1, and the linear velocity that is 40 degree to 70 degree and drainage flow when lipophilic-hydrophobic property fiber and horizontal line angle is not more than 0.05m/s, quick separation to 15～50 μ m dispersed oil droplets has good effect, because level angle is large, during horizontal movement, oil droplet more can rise separated along oleophylic fiber fast.
The flow direction of described sewage is level 0 degree.
When described Oil in Sewage Water content is 50～1000mg/L, 1～3 times of the spacing b that adjacent two hydrophilic oleophobic property fiber spacing a are adjacent two lipophilic-hydrophobic property fibers; When described Oil in Sewage Water content is 1000～10000mg/L, 3～6 times of the spacing b that adjacent two hydrophilic oleophobic property fiber spacing a are adjacent two lipophilic-hydrophobic property fibers.
Because Oil in Sewage Water content is less, the oil droplet of lower content is attached on water droplet with particulate, therefore the probability that more lipophilic fiber and hydrophilic fibers contact point pair are caught little oil droplet is also larger, therefore, as above-mentioned, the proportion control of a:b effect in the time of 1～3 times is best, surpass 3 by time efficiency have no obvious raising, then it is larger and meaningless to increase the words cost of lipophilic fiber ratio; And when in water, oil content is larger, the particle diameter of oil droplet is also larger, need more lipophilic fiber to catch and fast guiding is coalescent, grow up and make oil droplet separated, while finding that through studying for a long period of time in water, oil content is 1000～10000mg/L, as above-mentioned, the proportion control of a:b separating effect in the time of 3～6 times is best.
An X-type fibrage method that is applicable to water-oil separating, described fiber comprises hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber, described X-type fibrage method is as follows:
(1) described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber are carried out to x-shape interlock braiding;
(2), when being applied to oil dehydrating process, the weaving direction of described lipophilic-hydrophobic property fiber is consistent with the flow direction of described profit;
When the drop particle diameter in described oil product is 0.1～15 μ m, the braid angle of described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber is for 15 degree are to 40 degree along clockwise direction, and now the linear velocity of described oil product is less than or equal to 0.015m/s;
When the drop particle diameter in described oil product is 15～50 μ m, the braid angle of described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber is for 40 degree are to 70 degree along clockwise direction, and now the linear velocity of described oil product is less than or equal to 0.04m/s.
The inventor is through the discovery that studies for a long period of time, when hydrophilic oleophobic property fiber and horizontal line (oleophilic drainage fiber) angle are that the mobile linear velocity of 15 degree to 25 degree and oil product is while being not more than 0.015m/s, the water droplet (emulsification water droplet) that is 0.1～15 μ m to particle diameter has efficient separative efficiency, this be because the lipophilic-hydrophobic property fiber angle of hydrophilic oleophobic property fiber and level compared with hour, little water droplet is generally attached to compared with on larger oil droplet or be the Nodes that water in oil state moves to two fibers, be subject to hydrophilic oleophobic and oleophilic drainage polarity active force, water droplet is subject to the power that pulls of hydrophilic oleophobic fiber, and angle hour when horizontal displacement distance equates water droplet loading process longer, more easily separated, otherwise, when if angle is large, water droplet because of loading process short, and be difficult for separated under, shown in Figure 2, and when hydrophilic oleophobic property fiber and horizontal line angle be between 45 degree to 70 degree time, to disperseing the quick separation of water droplet to have good effect, because level angle is large, during horizontal movement, water droplet more can be fast move downward and by separated fast along hydrophilic fibre.
When in described oil product, water content is 50～1000mg/L, 1～4 times of the spacing b that adjacent two lipophilic-hydrophobic property fiber spacing a are adjacent two hydrophilic oleophobic property fibers; When in described oil product, water content is 1000～10000mg/L, 4～8 times of the spacing b that adjacent two lipophilic-hydrophobic property fiber spacing a are adjacent two hydrophilic oleophobic property fibers.This process is contrary with sewage degrease process, but because water droplet is different from viscosity and the surface tension of oil droplet, thereby different proportion of fibers are slightly variant while reaching high efficient oil dehydration.
Accompanying drawing explanation
Fig. 1 is the affect schematic diagram of braid angle on sewage degrease separating effect in X-type fibrage method;
Fig. 2 is the affect schematic diagram of braid angle on oil dehydrating separating effect in X-type fibrage method;
Fig. 3 is applied to X-shaped fibrage method schematic diagram in sewage degrease process;
Fig. 4 is applied to X-shaped fibrage method schematic diagram in oil dehydrating process;
Fig. 5 is the separated schematic diagram of oil droplet on X-shaped fibrage in sewage degrease process;
Fig. 6 is the separated schematic diagram of water droplet on X-shaped fibrage in oil dehydrating process.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
embodiment 1
The oil-polluted water of certain petro-chemical corporation's hydrogenation plant adopts braid method of the present invention to carry out oil removing, the about 2000mg/L of oil-containing in oil-polluted water, wherein approximately 30% is the emulsified oil droplet of 0.1～15 μ m, 70% is the suspension oil droplet of 15～30 μ m, 40 ℃ of operating temperatures, require sewage degrease after oil content be less than 100mg/L.
Scheme Choice: in this programme, diesel oil moisture is lower, the about 2000mg/L of oil-containing in oil-polluted water, wherein approximately 30% is the emulsified oil droplet of 0.1～15 μ m, 70% is the suspension oil droplet of 15～30 μ m, therefore intend adopting syllogic X-type layers of braided fibers to carry out separation to oily waste water, because containing more emulsified oil droplet, so oily waste water flow control is 0.015m/s
The spacing b of adjacent two lipophilic-hydrophobic property fibers of first paragraph X-type fiber braiding layer is b:a=3 with the ratio of the spacing a of adjacent two long and slender dimensions of hydrophilic oleophobic property, θ=50 ° (as shown in Figure 3), first design function for by 70% particle diameter being the suspended oil removal of 15～30 μ m; The fibrolaminar length of first paragraph is 300mm, and sewage stops about 20s at this section fibre layer.
The b:a=1.5 of second segment X-shaped fiber braiding layer (definition of b, a is the same), θ=20 °, first design function for being that the emulsified oil droplet of 0.1～15 μ m carries out that breakdown of emulsion is grown up and the removal of part by 30% particle diameter; The fibrolaminar length of second segment is 450mm, and sewage stops about 30s at this section fibre layer.
The b:a=3 of the 3rd section of X-shaped fiber braiding layer (definition of b, a is the same), θ=60 °, first design function for will carry out quick supplementary set removal through the coalescent oil droplet of growing up of second segment and the unsegregated oil droplet of first paragraph, the length of the 3rd section fibre layer is 300mm, and sewage stops about 20s at this section fibre layer.
In sewage degrease process, the separation process of oil droplet on X-shaped fibrage as shown in Figure 5.
Implementation result: in oil-polluted water, oil content is reduced to 60～8565mg/L after X-type braided fiber is processed, has reached the stable separation requirement that is less than 100mg/L of design objective, meets design and operation condition.
embodiment 2
The diesel oil of certain petro-chemical corporation's hydrogenation plant adopts braid method of the present invention to dewater, the moisture about 800mg/L of diesel oil, wherein approximately 15% is the emulsification water droplet of 0.1～15 μ m, 85% is the dispersion water droplet of 15～30 μ m, 50 ℃ of operating temperatures, require diesel oil dewatering after oil content be less than 200mg/L.
Scheme Choice: in this programme, diesel oil moisture is lower, the moisture about 800mg/L of diesel oil, wherein approximately 15% is the emulsification water droplet of 0.1～15 μ m, 85% is the dispersion water droplet of 15～30 μ m,, therefore intend adopting two-part X-type layers of braided fibers to carry out diesel oil dewatering processing, because containing more emulsified oil droplet, diesel stream speed control is made as 0.012m/s
The spacing b of adjacent two hydrophilic oleophobic property fibres of first paragraph X-type fiber braiding layer is b:a=1:2 with the ratio of the spacing a of adjacent two lipophilic-hydrophobic property fibers, θ=50 ° (as shown in Figure 4), first design function for by 85% particle diameter being the dispersion water droplet removal of 15～30 μ m, remove micro-emulsification water droplet simultaneously, the fibrolaminar length of first paragraph is 360mm, and oil product stops about 30s at this section fibre layer and dewaters.
The b:a=1:3 of second segment X-shaped fiber braiding layer (definition of the same the present embodiment 2 of definition of b, a), θ=25 °, first design function for being that the emulsification water droplet of 0.1～15 μ m carries out that breakdown of emulsion is grown up and separated by 15% particle diameter, the fibrolaminar length of first paragraph is also 360mm, and oil product stops about 30s at this section fibre layer and dewaters.
In oil dehydrating process, the separation process of oil droplet on X-shaped fibrage as shown in Figure 6.
Implementation result: in diesel oil, reduced water content is 120～150mg/L after X-type braided fiber is processed, has reached the stable separation requirement that is less than 200mg/L of design objective, meets design and operation condition.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.And all equivalence variations and modification of doing according to the content of the present patent application the scope of the claims, all should be technology category of the present invention.
Claims (5)
1. an X-type fibrage method that is applicable to water-oil separating, described fiber comprises hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber, it is characterized in that, described X-type fibrage method is as follows:
(1) described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber are carried out to x-shape interlock braiding;
(2), when being applied to sewage degrease process, the weaving direction of described hydrophilic oleophobic property fiber is consistent with the flow direction of described sewage;
When the oil droplet size in described sewage is 0.1～15 μ m, the braid angle of described lipophilic-hydrophobic property fiber and hydrophilic oleophobic property fiber is for 15 degree are to 40 degree in the counterclockwise direction, and now the linear velocity of described sewage is less than or equal to 0.02m/s;
When the oil droplet size in described sewage is 15～50 μ m, the braid angle of described lipophilic-hydrophobic property fiber and hydrophilic oleophobic property fiber is for 40 degree are to 70 degree in the counterclockwise direction, and now the linear velocity of described sewage is less than or equal to 0.05m/s.
2. X-type fibrage method as claimed in claim 1, is characterized in that, the flow direction of described sewage is level 0 degree.
3. X-type fibrage method as claimed in claim 1, is characterized in that, when described Oil in Sewage Water content is 50～1000mg/L, the spacing a of adjacent two hydrophilic oleophobic property fibers is 1～3 times of spacing b of adjacent two lipophilic-hydrophobic property fibers; When described Oil in Sewage Water content is 1000～10000mg/L, 3～6 times of the spacing b that adjacent two hydrophilic oleophobic property fiber spacing a are adjacent two lipophilic-hydrophobic property fibers.
4. an X-type fibrage method that is applicable to water-oil separating, described fiber comprises hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber, it is characterized in that, described X-type fibrage method is as follows:
(1) described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber are carried out to X-type braiding;
(2), when being applied to oil dehydrating process, the weaving direction of described lipophilic-hydrophobic property fiber is consistent with the flow direction of described profit;
When the drop particle diameter in described oil product is 0.1～15 μ m, the braid angle of described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber is for 15 degree are to 40 degree along clockwise direction, and now the linear velocity of described oil product is less than or equal to 0.015m/s;
When the drop particle diameter in described oil product is 15～50 μ m, the braid angle of described hydrophilic oleophobic property fiber and lipophilic-hydrophobic property fiber is for 40 degree are to 70 degree along clockwise direction, and now the linear velocity of described oil product is less than or equal to 0.04m/s.
5. X-type fibrage method as claimed in claim 4, is characterized in that, when in described oil product, water content is 50～1000mg/L, the spacing a of adjacent two lipophilic-hydrophobic property fibers is 1～4 times of spacing b of adjacent two hydrophilic oleophobic property fibers; When in described oil product, water content is 1000～10000mg/L, the spacing a of adjacent two lipophilic-hydrophobic property fibers is 4～8 times of spacing b of adjacent two hydrophilic oleophobic property fibers.
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Cited By (4)
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| CN106823470A (en) * | 2017-01-12 | 2017-06-13 | 华东理工大学 | A kind of compound coalescence material for water de-oiling |
| CN110079357A (en) * | 2019-04-12 | 2019-08-02 | 华东理工大学 | A kind of electric field-enhanced fibre module unit of abnormity and application |
| CN112062216A (en) * | 2020-09-17 | 2020-12-11 | 华东理工大学 | Demulsification method and device based on double-emulsion internal circulation flow of fiber heterojunction |
| CN113526791A (en) * | 2021-07-23 | 2021-10-22 | 上海中器环保科技有限公司 | Treatment device and method for biodiesel production wastewater |
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| CN110079357A (en) * | 2019-04-12 | 2019-08-02 | 华东理工大学 | A kind of electric field-enhanced fibre module unit of abnormity and application |
| CN112062216A (en) * | 2020-09-17 | 2020-12-11 | 华东理工大学 | Demulsification method and device based on double-emulsion internal circulation flow of fiber heterojunction |
| CN113526791A (en) * | 2021-07-23 | 2021-10-22 | 上海中器环保科技有限公司 | Treatment device and method for biodiesel production wastewater |
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Inventor after: Yang Qiang Inventor after: Wang Chaoyang Inventor after: Lu Hao Inventor after: Xu Xiao Inventor after: Liu Sen Inventor before: Yang Qiang Inventor before: Wang Chaoyang Inventor before: Lu Hao Inventor before: Xu Xiao Inventor before: Yang Sen |
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