采用滌綸高彈絲纖維球?yàn)V料對(duì)景觀水進(jìn)行過濾試驗(yàn),觀察其過濾特性及相關(guān)因素對(duì)過濾性能的影響.結(jié)果表明,在不投加任何絮凝劑,濾速為30 m/h,平均進(jìn)水濁度為87.5 NTU時(shí),纖維球?yàn)V料過濾周期達(dá)16.5 h左右,出水濁度維持在3～5 NTU.當(dāng)PAFC投加量為12 mg/L,濾速為30～50 m/h,進(jìn)水濁度為50～70 NTU時(shí),過濾出水濁度可以維持在1 NTU以下,過濾周期達(dá)6 h以上,周期截污量為30～45 kg/m3.采用氣沖-氣水聯(lián)合反沖-水沖的反沖洗方式,當(dāng)氣沖強(qiáng)度為25L/(s·m2),水沖強(qiáng)度為8 L/(s·m2)時(shí),纖維球?yàn)V料積泥量約占濾料質(zhì)量的4.53%.Using polyester high-elastic fiber ball filter material to filter the landscape water, observe its filtration characteristics and the influence of related factors on the filtration performance. The results show that without adding any flocculant, the filtration rate is 30 m/h, and the average intake rate is 30 m/h. When the water turbidity is 87.5 NTU, the filtration cycle of the fiber ball filter material is about 16.5 h, and the effluent turbidity is maintained at 3 to 5 NTU. When the dosage of PAFC is 12 mg/L, the filtration rate is 30 to 50 m/h, When the turbidity of the influent is 50～70 NTU, the turbidity of the filtered effluent can be maintained below 1 NTU, the filtration cycle can reach more than 6 hours, and the periodic interception capacity is 30～45 kg/m3. Air flushing-air water combined recoil -The backwash method of water flushing, when the air flushing strength is 25L/(s·m2) and the water flushing strength is 8 L/(s·m2), the amount of sludge in the fiber ball filter material accounts for about 4.53% of the quality of the filter material .

    取一束短纖維,在其中心緊密結(jié)扎或熱熔粘結(jié),使短纖維形成呈輻射狀的球體結(jié)構(gòu)。這種纖維球的個(gè)體特征是球中心纖維密實(shí),越靠近球邊緣則纖維越疏松,孔隙率分布不均。Take a bunch of short fibers and tie them tightly in the center or heat-melt them to make the short fibers form a radial spherical structure. The individual characteristic of this kind of fiber ball is that the fiber in the center of the ball is dense, and the closer to the edge of the ball, the looser the fiber and the uneven distribution of porosity.

    纖維球過濾器是在容器內(nèi)填裝纖維球形成床層,由于纖維球個(gè)體較疏松,在床層中纖維球之間的纖維絲可實(shí)現(xiàn)相互穿插,此時(shí)纖維球的個(gè)體特征已不重要,床層形成了一個(gè)整體。床層中纖維球受到的壓力為過濾水流的流體阻力、纖維球自身的重力以及截留懸浮物的重力之和(如果水流從上至下通過床層,該力在濾層中沿水流方向是依次遞增的。The fiber ball filter is filled with fiber balls in the container to form a bed. Because the fiber balls are relatively loose, the fiber filaments between the fiber balls in the bed can be interspersed with each other. At this time, the individual characteristics of the fiber balls are not important. The bed forms a whole. The pressure on the fiber balls in the bed is the sum of the fluid resistance of the filtered water flow, the gravity of the fiber balls and the gravity of the suspended matter (if the water flows through the bed from top to bottom, the force is sequentially in the direction of the water flow in the filter layer. Increasing.

    因纖維球具備一定彈性,在壓力下濾層孔隙率和過濾孔徑由大到小漸變分布,濾料的比表面積由小到大漸變分布。這是一種過濾效率由低到高遞增的理想過濾方式,直徑較大、容易濾除的懸浮物可被上層濾層截留,直徑較小、不易濾除的懸浮物可被中層或下層濾層截留。在整個(gè)濾層中,機(jī)械篩分和接觸絮凝作用都得到充分發(fā)揮,從而實(shí)現(xiàn)較高的濾速、截污容量和較好的出水水質(zhì)。Because the fiber ball has certain elasticity, the porosity of the filter layer and the filter pore size are gradually distributed from large to small under pressure, and the specific surface area of the filter material is gradually distributed from small to large. This is an ideal filtration method with filtration efficiency increasing from low to high. The suspended matter with a larger diameter and easy to filter can be intercepted by the upper filter layer, and the suspended matter with a smaller diameter and difficult to filter can be filtered by the middle or lower filter layer. Withhold. In the entire filter layer, the effects of mechanical screening and contact flocculation are fully exerted, so as to achieve higher filtration speed, sewage interception capacity and better water quality.