Recently, a new type of titanium filter element water treatment device with photocatalytic function has come to people's eyes. This device is provided with a shell, the upper end of the shell has a water inlet, and the lower end has a water outlet. The surface of the titanium filter element is solidified with a photocatalytic layer, and at least two ultraviolet lamps are arranged in the shell, which has the dual functions of photocatalysis and titanium filter element, which can realize the filtration and separation of pollutants and realize the photocatalytic decomposition of pollutants and can also play the role of killing pathogenic microorganisms; the device has the function of gas-water backwashing, and there are no problems such as separation and recovery of catalysts and membrane pollution. It can form a water treatment unit system alone, or can be combined with other water treatment systems, which improves the water treatment efficiency and reduces the treatment cost, and can be widely used in the treatment of various water quality.
titanium filter
titanium filter
Structure introduction
A shell (1) is provided, the upper end of the shell (1) is provided with a water inlet (2), the lower end is provided with a water outlet (3), and a titanium filter element (4) connected to the water outlet (3) is built in the shell (1). ), characterized in that: a photocatalytic layer (5) is solidified on the surface of the titanium filter element (4), and at least two ultraviolet lamps (6) are arranged in the shell (1). A water inlet valve (7) is connected to the water inlet (2), a water outlet valve (8) and a backwash pipe (9) are connected to the water outlet (3), and a backwash valve is connected to the backwash pipe (9) and (10), and an air-water backwash pump (11), and a backwash drain pipe (12) and a backwash drain valve (13) are provided at the lower end of the shell (1).
Background technique
The biggest feature of membrane separation is that gravity is the driving force and there is no large amount of heat change. It has the advantages of high efficiency, energy saving, simple process, convenient operation, environmental friendliness, easy automation, and easy integration with other technologies. It has been widely used in water treatment. , medicine, food, biological engineering, chemical industry, petrochemical industry, metallurgical industry and gas purification. Titanium filter element is a commonly used membrane in membrane separation technology. It is a porous titanium filter element made of industrial high-purity titanium powder through sieving, static pressure molding, and high temperature and high vacuum sintering. Titanium filter element is used in the field of water treatment because of its fast and effective retention effect, but its independent selective separation function and pollution phenomenon cause its effect on water treatment and energy consumption to change significantly with time.
Photocatalysis technology is an advanced oxidation technology. It applies light energy to the photocatalyst to excite the surrounding oxygen and water molecules to generate active free radicals with strong oxidative power, which can decompose most of the organic compounds that are harmful to the human body and the environment. Therefore, water purification systems based on photocatalytic oxidation technology have been successfully applied to the degradation of organic pollutants in water bodies, removal of nitrogen oxides, and sterilization. Photocatalysts mostly use semiconductor materials such as TiO2, SnO2, ZnO or WO3, among which TiO2 has become the most promising material for industrial application because of its stable photochemical properties, low price, and safety. However, the current TiO2 photocatalytic water treatment system has the disadvantage that the photocatalyst is difficult to separate and recycle.
In order to overcome the respective problems of membrane separation technology and photocatalysis technology, there are technologies that couple photocatalysis and membrane separation technology, such as the existing suspended photocatalytic membrane reactor. The suspension type photocatalytic membrane reactor is to suspend the powdered photocatalyst in the water body, and after the photocatalytic reaction, it is recovered by the membrane separation technology. Although photocatalysis and membrane separation are carried out in the same reactor, they are actually two independent units, and new problems such as membrane blockage and membrane fouling are easily caused by photocatalysts.
