Characteristics of the device of ultrafiltration water treatment equipment

You can find reverse osmosis pure water treatment equipment at your local water treatment equipment provider**. Reverse osmosis pure water treatment equipment is a common household or industrial water treatment equipment that removes impurities, microorganisms, and harmful chemicals from water while retaining minerals and trace elements in the water. Such equipment is often used to improve the quality of water and meet the needs of domestic and industrial water.

When looking for reverse osmosis pure water treatment equipment, you can search for "reverse osmosis pure water treatment equipment" on your local supplier, or you can look for an advertisement for a water treatment equipment supplier in your local yellow pages or book. In addition, you can also consult your local water treatment industry association or organization for information and advice from the best suppliers. When choosing reverse osmosis pure water treatment equipment, you need to consider the quality, performance, and dimensions of the equipment

The ultrafiltration unit uses vertical cross-flow filtration, which can be effectively cleaned or backwashed. As a result, it has significant properties that differ from other purification and separation devices:

High precision: Thoroughly filter out bacteria, rust, colloids, macromolecular organic matter and other substances in the water, retain trace elements that are beneficial to human health, and the main indicators such as microorganisms and turbidity of the purified water are better than the hygienic standards of bottled drinking water.

Long life: Because the ultrafiltration machine adopts the principle of vertical cross filtration, it is automatically cleaned and not easy to be dirty and blocked, so the life of the filter element is 30-50 times that of ordinary water purifiers under normal use.

Large throughput: It can meet the needs of direct drinking, beauty, bathing, eating, cleaning and hygiene at the same time.

Low cost: Due to the large flux, long life and maintenance-free ultrafiltration machine, the cost of purified water treatment per ton is only about one yuan, which is far lower than that of other purification devices.

Ultrafiltration is a membrane separation technology between nanofiltration and microfiltration, and its main components are mostly porous asymmetric ultrafiltration membranes, which are mainly used for the separation of macromolecular substances in the solution, so that useful substances can be classified, concentrated and purified. The ultrafiltration process is a solution separation process driven by the pressure difference between the two sides of the membrane and based on the principle of mechanical screening. At present, ultrafiltration technology has been widely used in the process of industrial sewage treatment.

In the process of seawater desalination, the reverse osmosis process cannot be directly applied due to the large changes in seawater quality and high turbidity. After the seawater is pretreated by ultrafiltration membrane, the effluent quality is stable, and it is better than the conventional filtration process, and fully meets the inlet requirements of reverse osmosis, so ultrafiltration technology has been widely used in the process of seawater desalination. Raw water (including river water, reservoir water and groundwater) that has been slightly polluted is filtered by ultrafiltration technology and fully meets the water quality standards for drinking water with stove base.

The use of ultrafiltration to treat low turbidity micro-polluted water sources has a good effect, especially for turbidity and pathogenic microorganisms, which can greatly improve the removal effect of organic pollutants and alleviate membrane pollution. Ultrafiltration membrane technology has been widely used in water supply and countless treatments, and has achieved ideal treatment results, but it still has certain limitations, such as large pore size, poor removal rate of some substances with small molecular weight, but it is undeniable that ultrafiltration technology will play an important role in the water treatment industry for a long time in the future.

What is Wastewater Treatment Ultrafiltration?

Wastewater treatment ultrafiltration is a treatment technology that filters sewage through ultrafiltration membranes to make it reusable. This technology can filter out bacteria, viruses, heavy metals and other harmful substances in water, and can be widely used in industrial wastewater, urban sewage treatment, drinking water treatment and other fields.

The role of ultrafiltration in sewage treatment.

Wastewater treatment has many functions, the most notable of which is that it can convert wastewater into reusable water. Specific roles include:

Filtration of harmful substances: Ultrafiltration membranes can filter out bacteria, viruses, heavy metals and other harmful substances in water, making the treated water a reusable water resource.

Reduced treatment costs: Compared with traditional wastewater treatment technologies, ultrafiltration technology can significantly reduce treatment costs and reduce chemical consumption in the treatment process.

Energy saving: Compared with traditional technologies such as evaporation and crystallization, ultrafiltration technology can greatly reduce energy consumption and reduce the burden on the environment.

Improve water resource utilization: Wastewater treatment ultrafiltration converts wastewater into reusable water resources, which can improve water resource utilization and reduce the exploitation of natural resources such as groundwater.

Application of ultrafiltration in sewage treatment.

Wastewater treatment ultrafiltration can be widely used in the following fields:

Industrial wastewater treatment: Many industrial processes produce a large amount of wastewater, which contains various harmful substances and pollutes the environment. Through wastewater treatment ultrafiltration, this wastewater can be filtered into a reusable resource of water cocoon.

Urban sewage treatment: urban sewage contains a large number of harmful substances, if not treated, it will have a serious impact on the environment and human health. Through sewage treatment ultrafiltration, urban sewage can be effectively treated to ensure the urban environment and people's health.

Drinking water treatment: Most of the tap water used in people's daily life needs to be treated to be safe to drink, and ultrafiltration technology can treat the water quality more carefully and make the water quality more safe and reliable.

The development trend of sewage treatment ultrafiltration technology.

With the continuous development of ultrafiltration technology for wastewater treatment, this technology is expected to develop the following trends in the next few years:

Technology upgrading: With the development of science and technology, ultrafiltration technology will be further upgraded to become a more efficient and environmentally friendly sewage treatment technology.

In summary, sewage treatment ultrafiltration technology plays an important role in converting sewage into reusable water resources, providing a guarantee for people's life and health.

Hollow fiber ultrafiltration membrane filtration principleUltrafiltration is a sieving process related to the pore size of the membrane, with the pressure difference on both sides of the membrane as the driving force, with the ultrafiltration membrane as the filter medium, under a certain pressure, when the stock solution flows through the membrane surface, many small micropores densely covered on the surface of the ultrafiltration membrane only allow water and small molecule substances to pass through and become permeable liquid, and the volume of the substance in the stock solution larger than the micropore size on the membrane surface is intercepted on the inlet side of the membrane to become a concentrated liquid, so as to achieve the purpose of purification, separation and concentration of the stock solution.

After the ultrafiltration membrane is used for a period of time, the trapped bacteria, rust, colloids, suspended solids, macromolecular organic matter and other harmful substances will adhere to the inner surface of the ultrafiltration membrane, so that the water yield of the ultrafiltration membrane will gradually decrease, especially when the tap water pollution is serious, it is easier to cause the blockage of the ultrafiltration membrane, and regular flushing of the ultrafiltration membrane can effectively restore the water yield of the membrane. The ultrafiltration element is made into an ultrafiltration element as shown in the figure below after the casting process of the bundled ultrafiltration membrane filament, which is composed of three parts: ABS shell, epoxy heads at both ends of the shell and bundled ultrafiltration membrane filaments. The epoxy head fills the gap between the membrane filament and the membrane filament, forming an isolation between the stock solution and the permeate solution, and the stock solution first enters the hollow fiber ultrafiltration membrane pores, and becomes the permeable liquid after being filtered by the ultrafiltration membrane, which prevents the stock solution from entering the permeate directly without filtration.

Internal pressure and external pressure hollow fiber ultrafiltration membraneA ultrafiltration membrane is composed of hundreds to thousands of small hollow fiber filaments, and the ultrafiltration membrane between the inner diameter of the hollow fiber membrane is generally called capillary ultrafiltration membrane, and the capillary ultrafiltration membrane is not easy to be blocked by large particulate matter because of its large inner diameter. According to the different water inlet methods, ultrafiltration membranes are divided into two types: internal pressure type and external pressure type: a) internal pressure type

That is, the stock solution first enters the hollow filament, driven by the pressure difference, and penetrates through the hollow fiber from the inside to the outside along the radial direction to become the permeable liquid, and the concentrate stays inside the hollow filament and flows out from the other end. ~~tm

Brief introduction to 3 types of water treatment ultrafiltration systems:

1. Select membrane + activated carbon process.

Raw water - grid - conditioning tank - membrane treatment - activated carbon - disinfection.

2. The process of high-quality miscellaneous drainage and miscellaneous drainage as the source of reclaimed water.

Mainly physicochemical treatment: raw water, grid, regulating tank, coagulation or air flotation, filtration, disinfection;

Focusing on physicochemical + membrane method, raw water - grid - regulating tank - coagulation - membrane treatment - disinfection.

3. The process of miscellaneous drainage and mixed sewage as a source of reclaimed water.

Mainly biochemical treatment: raw water, grid, conditioning tank, biological treatment, precipitation, filtration, disinfection;

Two-stage biochemical process raw water-grid-regulating tank-first-stage precipitation-second-stage precipitation-filtration-disinfection.

Industrial ultrafiltration devices include plate and frame type, tubular type, and spiral coil type, among which spiral coil type is more widely used.

Ultrafiltration membrane materials include cellulose acetate (Ca), polyalum (PSF), polyether alum (PES), polycarbonate resin, polyacrylonitrile (PAN) and polymeric electrolyte complexes.

During the operation of the ultrafiltration unit, the main operation and maintenance content is to clean the filter membrane, and the cleaning method is divided into physical method and chemical method.

The physical method is generally rinsed with warm water (40 50).

The chemical method is to clean with chemical cleaning agents, such as acids, alkalis, surfactant solutions, etc.

For different types of membranes, chemical cleaning agents should be carefully selected to prevent damage to the membrane by chemical cleaning agents. After a well-cleaned membrane, the water permeability can be restored to 95% 100, and the service life of the ultrafiltration membrane can reach more than one year.

In wastewater treatment, ultrafiltration is mainly used to remove organic matter such as starch, protein, gum, paint, clay, microorganisms, etc., in wastewater treatment, it can also be used for sludge dewatering, instead of clarifiers, etc., and for purifying glycol.

Ultrafiltration systems are generally used to treat sewage, and its main parts include: pretreatment + ultrafiltration + pretreatment + reverse osmosis!

In fact, the ultrafiltration system for water treatment is divided into 2 parts, and it is divided into 4 types according to different industries.

One function is the front section of turbidity, and the other is the terminal ultrafiltration.

If the industry is different, there are the following three types:

Urban and civil reclaimed water reuse, etc.: UF turbidity removal + general water treatment follow-up treatment water sterilization: UF turbidity removal + general water treatment follow-up treatment + UF membrane sterilization pharmaceutical pure water:

UF turbidity removal + 2-stage RO + EDI + terminal ultrafiltration UF electronic ultrapure water: UF turbidity removal + 2-stage RO + EDI + terminal ultrafiltration UF

There are many articles on ultrafiltration systems on the Internet, do it yourself, and search for keywords.

Here is the technical manual.

Water filter vacuum cleaner.

Self-cleaning filters.

Fully automatic filter.

Backwash filters.

Differential pressure filter.

Brush filters.

Circulating water filter.

Stainless steel filter.

Pipeline strainers.

Descaling filters.

Suction filter.

Horizontal filter.

Pre-filter.

Reverse osmosis purified water equipment.

Ultrafiltration mineral water equipment.

Ultrafiltration membranes are widely used in water treatment projects. Ultrafiltration technology plays an increasingly important role in reverse osmosis pretreatment, drinking water treatment, reclaimed water reuse and other fields. Ultrafiltration technology plays a key role in the sterilization and turbidity removal of wine and beverages, the depyrogen removal of drugs, and the concentration of food and pharmaceutical preparations.

The range of ultrafiltration filter pore size and molecular weight cut-off has been vaguely defined, and it is generally considered that the filter pore size of ultrafiltration membrane is microns, and the molecular weight cut-off (MWCO) is 1,000-1,000,000 dalton. Strictly speaking, ultrafiltration membranes have a filter pore size of microns and a molecular weight cut-off of 1,000-300,000 dalton. Microporous membranes with a pore size greater than microns or a molecular weight cut-off greater than 300,000 dalton should be defined as microfiltration or fine filtration.

Generally, ultrafiltration membranes used for water treatment have a nominal molecular weight cut-off of 30,000-300,000 daltons, while ultrafiltration membranes with a molecular weight cut-off of 6,000-30,000 daltons are mostly used in the fields of material separation, concentration, sterilization and heat source removal.

The form of ultrafiltration membrane can be divided into two types: plate type and tubular type. Tubular ultrafiltration membranes are divided into hollow fiber, capillary and tubular according to their different diameters. The ultrafiltration membranes used for water treatment on the market are basically capillary type, and the Suiga hollow fiber (inner diameter polyethylene or polypropylene microporous membrane) used in individual projects should actually belong to microfiltration membranes.

The combination of ultrafiltration membrane filaments into a component that can be connected to the ultrafiltration system is called an ultrafiltration membrane module. Ultrafiltration membrane modules are divided into three types: internal pressure type, external pressure type and immersion type. Among them, the driving force of immersion ultrafiltration membrane filtration is the pressure difference between the true cautious space inside the membrane tube and the atmospheric pressure.

For ultrafiltration membranes with high filtration accuracy requirements, this pressure difference is usually not easy to meet the requirements of the required filtration driving force, so the submerged module form is more suitable for ultrafiltration membranes or microfiltration membranes with low filtration accuracy. In the process of forward flushing and reverse flushing, the flow rate of the liquid on the surface of the membrane is extremely uneven, which affects the flushing effect of the membrane surface, so the ultrafiltration membrane commonly used in water treatment or the internal pressure module structure has advantages.