Abstract:
A method of cleaning a liquid fluid filter (2) by means of a at least one cleaning process (BW), wherein said cleaning process (BW) is started after a predeterminded time period of operation of the filter or a predetermined amount of liquid filtered, characterized by detecting a first transfilter pressure value (TMP) between both sides of the filter (2) at a first point in time and detecting a second transfilter pressure value (TMP) between both sides of the filter (2) at a second point in time, calculating a difference value (”TMP1, ”TMP2) of the two detected transfilter pressure values (TMP), comparing said difference value (”TMP1, ”TMP2) with a limit value XX, decreasing said predetermined time period or said predetermined amount of liquid to be filtered between two starts of said cleaning process BW if said limit value XX is exceeded by said difference value (”TMP1, ”TMP2).
Abstract:
An object of the present invention is to provide a membrane distillation apparatus having a high water treatment capability as well as being compact in size. The present invention provides a membrane distillation apparatus that comprises an evaporation part comprising a liquid phase part 1 in which water to be treated flows, a gas phase part 1, and a hydrophobic porous membrane that separates the liquid phase part 1 and the gas phase part 1, a condensation part comprising a liquid phase part 2 in which cooling water flows, a gas phase part 2, and a cooling member that separates the liquid phase part 2 and the gas phase part 2, and a gas phase part 3 connecting the gas phase part 1 with the gas phase part 2, wherein the pressure of the gas phase parts 1 to 3 is 1 kPa or higher and the saturated steam pressure of water at the temperature of water to be treated or lower. The present invention also provides a hydrophobic porous membrane having a surface porosity of a membrane surface that comes into contact with water to be treated of 20% or more and an air permeation coefficient of 8.0 × 10 -7 m 3 /m 2 ·sec·Pa or more.
Abstract:
Methods for controlling a spinning membrane separator so as to limit fouling of the membrane by changing the rotation rate of the spinning membrane in response to the fouling rate, while maintaining a constant outlet cellular concentration. Increasing the spinner rotation rate will increase the strength of the Taylor vortices generated within the separator by the spinning of the membrane, which should reduce fouling of the membrane. The goal of the method is to rotate the spinning membrane at the slowest rate possible without unacceptable fouling. Two specific methods to control fouling are disclosed. In a first, unidirectional method, the spin rate of the membrane is only increased in response to undesirable fouling in order to prevent the fouling from continuing. In a second, bidirectional method, the spin rate of the membrane may be either increased or decreased in response to the measured fouling rate in order to maintain the fouling rate within a desired range.
Abstract:
An object of the present invention is to provide a membrane distillation apparatus having a high water treatment capability as well as being compact in size. The present invention provides a membrane distillation apparatus that comprises an evaporation part comprising a liquid phase part 1 in which water to be treated flows, a gas phase part 1, and a hydrophobic porous membrane that separates the liquid phase part 1 and the gas phase part 1, a condensation part comprising a liquid phase part 2 in which cooling water flows, a gas phase part 2, and a cooling member that separates the liquid phase part 2 and the gas phase part 2, and a gas phase part 3 connecting the gas phase part 1 with the gas phase part 2, wherein the pressure of the gas phase parts 1 to 3 is 1 kPa or higher and the saturated steam pressure of water at the temperature of water to be treated or lower. The present invention also provides a hydrophobic porous membrane having a surface porosity of a membrane surface that comes into contact with water to be treated of 20% or more and an air permeation coefficient of 8.0 × 10 -7 m 3 /m 2 ·sec·Pa or more.
Abstract translation:本发明的目的是提供一种具有高水处理能力并且尺寸紧凑的膜蒸馏装置。 本发明提供了一种膜蒸馏装置,其包括:蒸发部分,其包括待处理水在其中流动的液相部分1,气相部分1以及分离液相部分1和气相部分的疏水性多孔膜 具体实施方式如图1所示,冷凝部分包括冷却水流动的液相部分2,气相部分2和分离液相部分2和气相部分2的冷却部件,气相部分3将气体 其中气相部分1与气相部分2之间的压力为1kPa或更高,并且在待处理水的温度下水的饱和蒸汽压力或更低。 本发明还提供一种疏水性多孔膜,其具有与被处理水接触的膜表面的表面孔隙率为20%以上且透气系数为8.0×10 -7 m 3 / m 2·sec·Pa或 更多。
Abstract:
The appliance for the oxygenation of blood (1) comprises a device (2) of the type with radial flow for extracorporeal blood oxygenation having at least an inlet fitting (4) and at least an outlet fitting (5) for the blood arranged so as to define a radial path for the blood itself, at least an inlet duct (6) and an outlet duct (7) for a work gas intended to supply oxygen to the blood and/or to remove carbon dioxide from the same, wherein the device (2) comprises transit means for the work gas placed between the inlet duct (6) and the outlet duct (7) of the type of a bundle of hollow fibers having increasing density going radially outwards, and by the fact that it comprises at least a main line (9) for the supply of the work gas to the inlet duct (6) and pressure variation means for the variation of the work gas.
Abstract:
An apparatus for continuous closed-circuit consecutive sequential desalination of a salt water solution by reverse osmosis that comprises a closed circuit system comprising one or more desalination modules having their respective inlets and outlets connected in parallel by conducing lines, each of desalination modules comprising of one or more membrane elements, a pressurizing device for creating counter pressure to enable reverse osmosis desalination and replacement of released permeate by fresh, a circulation system for recycling the desalinated solution through the desalination modules, a conducting line systems for permeate collection from the desalination modules, a conducting line system for removing brine effluent a valve system to enable periodic discharge of brine from the closed circuit without stopping desalination,; and monitoring and control systems to enable continuous closed circuit desalination of desired recovery proceed in consecutive sequential steps under variable or constant pressure conditions.
Abstract:
In order to efficiently transport a filtration target liquid to a separation membrane module and to facilitate additional simplification of equipment in a filtration device including the separation membrane modules in which a plurality of lines thereof are disposed in series, a filtration device according to the present invention is a filtration device including a plurality of separation membrane modules each of which separates a liquid to be filtrated into a permeated liquid and a non-permeated liquid, in which the filtration device includes: a series non-permeated liquid flow channel that forms a series unit by connecting non-permeation sides of the plurality of separation membrane modules in series; and a parallel permeated liquid flow channel that forms a parallel unit by connecting permeation sides of the plurality of separation membrane modules in parallel.