The working principle of

Duck-tube reverse osmosis (hereinafter referred to as "DTRO") is a special structure of reverse osmosis technology. The key part of the DTRO is the disc-type membrane column, which is formed by a set of hydraulic discs and a reverse osmosis membrane tightly assembled into a cylinder through a stainless steel tube with screw teeth at both ends. This special hydraulics design enables the treated liquid level to pass through the reverse osmosis membrane quickly with the shortest distance, and then reverse to the other membrane surface at 180°, thus effectively avoiding the membrane blockage and concentration polarization phenomenon, and successfully extending the service life of the membrane.

Technical advantages

(1) The system can accept high refractory wastewater, such as CODCr1000-2000mg /L, salt content 1000-2000mg /L, system recovery rate is as high as: 70%-85%;

(2) The inflow SDI of the system can be as high as 6.5, and the conductivity of water production can be as low as 100us/cm;

(3) The system is simple and convenient to install, occupies a small space and is easy to maintain;

(4) The system has the characteristics of high performance and low cost, and the operation cost per ton of water is less than 2 yuan;

(5) the life of the membrane is 5-10 years;

(6) the system disc type diaphragm has a special hydraulic structure, the upper and lower two layers of polyamide composite film, the middle for the filamentous support, the outer ring of the three layers of ring material using ultrasonic welding technology;

(7) The treated liquid enters the membrane column to the outlet of the membrane column. When passing through a layer of disc, the flow direction of the fluid changes by 180°, which reduces the concentration polarization phenomenon to a certain extent.

(8) Adopt dish tube type membrane column structure, with spacious fluid channel, allowable liquid particle concentration load up to 2500ppm;

(9) the guide plate surface has a certain way of arrangement of convex points, so that the treatment liquid to form turbulence, increase the transmission rate and self-cleaning function;

DTRO膜元件参数规格

注：以上性能参数均为标称值。单个组件实际产水量可能在±15%范围内浮动。

贮存条件

（1） 膜元件在拆封安装前，必须在我司原包装条件下保存。

（2） 膜元件最佳保存温度为5-10℃，最高温度不超过35℃。

（3） 膜元件贮存地点应避免阳光直射，同时保证贮存地点干燥。

通用信息

（1） 膜元件一旦湿润，必须始终保持湿润。

（2） 若系统长期处于停机状态，为防止微生物滋长，我司建议将膜元件放置保护液中静置保存。

（3） 系统运行过程中，无论何时都应避免膜柱产水侧产生背压，以免损坏膜片。

（4） 客户在系统运行中应保证使用我司认可的清洗药剂及运行投加药剂，以免对膜元件及系统运行造成不当的影响。