Effect of Scale Inhibitor on Reverse Osmosis Membrane Components

Reverse osmosis technology is one of the mature desalination technologies in water treatment. In combination with the actual situation and the needs of different water users, a reverse osmosis water treatment system with different processes is formed during the design and use.

reverse-osmosis-membrane-equipment

If the process design is not perfect, improper operation or the addition of chemicals cannot be compatible with water, etc., the water production and water quality of the reverse osmosis system will be reduced, and even the reverse osmosis membrane components will be seriously damaged. Therefore, the protection of reverse osmosis membrane elements is particularly important throughout the design and operation of the system.

The reverse osmosis process is a physical desalination technique. Use the natural penetration phenomenon to exert an osmotic pressure greater than the original water. The molecular separation is carried out by a selectively permeable semipermeable membrane, raw water-insoluble and most of the salts and water.

As fresh water continues to permeate through the membrane, salts and insoluble materials gradually concentrate, and as the concentration factor increases, some insoluble salts may foul. In order to prevent such fouling from occurring, an anti-scaling dispersant is added to the reverse osmosis water to suppress scale formation. Therefore, choosing a good compatibility and a good scale inhibitor selection process is an important issue.

Reverse osmosis scale inhibitors are specially developed for reverse osmosis systems. An effective scale inhibitor prevents fouling of insoluble substances or salts in the water on the surface of the membrane, thereby increasing water production and water quality systems and reducing operating costs.

Reverse osmosis is currently one of the most recognized technologies for the manufacture of desalinated water. Today, power, coal chemical, coking and refining, seawater desalination, food, cosmetics, and other aspects have been unable to break away from reverse osmosis technology.

Reverse osmosis technology is a membrane separation technology, and a roll film is currently widely used. During the operation of the equipment, it is easy to cause biological and chemical pollution of the membrane, which leads to an increase in the water supply pressure and cleaning frequency of the system, a decrease in the water output or the salt rejection rate, and even the membrane element is scrapped in advance in severe cases.

In order to ensure the economical, safe and smooth operation of the RO system, in addition to the reliable design of the device and the selection of components and perfect operation management, it is very important to select the appropriate anti-osmosis membrane special agent to prevent or mitigate pollution.

Commonly used agents for reverse osmosis equipment include scale inhibitors, bactericides, cleaning agents, and scale inhibitors. As the name implies, their main function is to prevent or slow the formation of inorganic scale on the surface of the RO membrane. In combination with the use of fungicides to reduce biofouling, the use of reducing the number of front-end chemicals, reducing the frequency of cleaning, reducing cleaning input, and reducing energy consumption are achieved. Really practical to save costs for the enterprise.

Characteristics of Reverse Osmosis Agents

Within the large concentration range of effective control of inorganic pollution.
Does not form insoluble materials with iron-aluminum oxides and silicon compounds.
Effectively inhibits the polymerization and deposition of silicon.
It is used in a wide range of applications, including reverse osmosis CA and TFC membranes, nanofiltration membranes and ultrafiltration membranes.
Excellent solubility and stability.
The pH value in the water supply range is 5-10.

The control of the dosage in actual use should also be accurate. The larger the dosage is, the better the effect will be. The large dosage will cause fouling of the original membrane.

In order to truly reduce the use of front-end chemicals, reduce cleaning frequency, reduce cleaning input, reduce energy consumption, etc., the actual cost savings for enterprises.

A reverse osmosis scale inhibitor product with stable quality, reliable performance, complete certification, and follow-up service is indispensable, which can bring unexpected benefits to customers during the user’s use.

2018 Boiler Water Treatment Method

Poor boiler water treatment will cause fouling on the heating surface, greatly reducing the heat transfer efficiency of the boiler, and overheating the metal on the heated surface, causing dangerous accidents such as bulging and bursting. Therefore, boiler water treatment is one of the important factors affecting the safety and economic operation of boiler boilers. In addition, poor boiler water treatment can also cause metal corrosion and reduce boiler life. Therefore, doing boiler water treatment work is extremely important for the safe operation of boilers.

boiler-water-treatment

Scaling

After the water is boiled and evaporated in the boiler, the chemical reaction and concentration conditions of the impurities in the water are provided. When these impurities reach saturation in the boiler, water, solid matter is produced. The solid matter produced, if suspended in the boiler, water, is called slag; if it is attached to the heated surface, it is called scale.
The boiler is also a heat exchange device, and the formation of scale will greatly affect the heat transfer of the boiler. However, the thermal conductivity of scale is only a tenth to a few hundredths of that of steel. Therefore, boiler fouling will cause serious damage to boiler operation.

Waste Fuel

After the boiler is fouled, the heat transfer performance of the heated surface is deteriorated, and the heat released by the fuel combustion cannot be transferred to the boiler, water in time, and a large amount of heat is taken away by the flue gas, causing the exhaust gas temperature to be too high, and if the smoke exhaustion is increased, The boiler thermal efficiency is reduced.
In order to maintain the boiler’s rated parameters, the company must add more fuel, thus wasting fuel. According to statistics, about 1 mm of scale is wasted a waste of fuel.

Damaged By the Heated Surface

In a scaled boiler, the heat of combustion of the fuel cannot be quickly transferred to the boiler, water due to poor heat transfer performance, resulting in an increase in the temperature of the furnace and the flue gas.
Therefore, the temperature difference on both sides of the heated surface increases, the temperature of the metal bismuth rises, and the strength decreases. Under the pressure of the boiler,, bulging and even blasting occur, posing a threat to the personal safety of employees and the property safety of the enterprise.

Reduce Boiler Output

After the boiler is fouled, the heat transfer performance deteriorates. Enterprises need to consume more fuel if they want to reach the rated evaporation. However, the volume of the furnace is constant, and as the thickness of the scale increases, fuel consumption is limited. Therefore, the boiler output will be reduced.

Boiler Water Treatment Method

The water treatment chemical of the boiler plays an important role in the normal operation of the boiler. In view of the problems existing in the water treatment process of the boiler proposed above, the following is a brief discussion of the countermeasures for boiler water treatment.

Take Reasonable Water Treatment Methods

It has been suggested that there are some unreasonable places in the process of boiler water treatment, which needs to be readjusted in the future processing. It is strictly forbidden to apply the “three no” electronic anti-scaling instruments and anti-scaling agents in the process. For steel-shell boilers with small steam pressure and small evaporation, it is necessary to adopt external chemical treatment methods for water treatment. When deoxidizing equipment can be used for deaeration; for boilers with large steam pressure and large evaporation, in addition to the method of external chemical treatment, it is necessary to install deaerator equipment to timely treat impurities in the water and reduce the Corrosion of boilers; in the process of water treatment, it is also necessary to use advanced technology, such as sodium ion exchange treatment method, which can effectively remove elements such as calcium, magnesium, and iron in water, and reduce the scaling of boilers. occur. It is important to note that experimental work is required before adopting new technologies.

Enhance the Quality of Water Treatment Equipment

The quality of water treatment equipment also plays a significant role in the treatment process, so corresponding measures should be taken for low-quality equipment. For the case of resin iron poisoning, find out the cause of poisoning and take measures to recover the resin, or change the material of the boiler to prevent iron poisoning; when using the resin exchanger, use the outside of the boiler. Chemical treatment methods and enhance the quality of the equipment.

Water Treatment Plant Process in Power Station

Electric power has always been the main clean energy source for economic construction and urban development, and it has attracted much attention. Currently, the electric power is mostly generated due to the combustion of fossil fuels besides several other new energy sources. Therefore, the stable operation of large generator sets and related equipment has become a guarantee for the normal operation of electric power production. With the increase in the production efficiency and other functions of such large generator sets and corresponding equipment, the standards for the water quality used are becoming more stringent.

power-plant

With the continuous development of economy and science and technology, various water treatment technologies and processes are constantly being produced. Meanwhile, there are clear restrictions on water quality requirements in power plant water treatment. For instance, the phosphate content and pH value in water have stricter requirements than before. Furthermore, there have been great breakthroughs in equipment, production, processes and testing methods. That laid the foundation for more scientific and rational water treatment chemical.

The layout of equipment in the traditional generating station is mainly in a unitized and decentralized state according to its use. This arrangement lacks the effective and reasonable use space and wastes resources way too much. Moreover, the long pipeline line causes excessive energy consumption during the transportation process. These are not for actual production and management needs. Nowadays, all type of factory layouts is gradually developing in three dimensions. Equipment is centrally arranged. This not only saves space but also increases the utilization of the equipment.

Traditional chemical water treatment systems usually use human-based on-site monitoring to achieve day-to-day management of the production site. Unnecessary accidents due to human operation delays. With the development of push-button control, automation and computer technology, programmable logic controllers (PLCs) are widely used. Using PLC to realize data acquisition and control of each device. Chemical water treatment system enables centralized monitoring, operation, and control. The emergency response of the emergency situation is realized through the chain control.

Powerhouse water consumption is severe in actual production. Just to react to environmental requirements, water resources must be used effectively. Nowadays, some powerhouse with a higher degree of automation has basically achieved zero discharge of wastewater. This not only achieves the purpose of saving water but also avoids environmental pollution.

Common processes for chemical water treatment in traditional powerhouse include filtration and sedimentation, dosing and concentration, etc. These water treatment methods are relatively backward. As technology advances, some new water treatment technologies are related to powerhouse. Just like ion membrane, ultrafiltration, reverse osmosis, and other technologies. These new technologies provide effective technical support for chemical water treatment in a power station.

With the advancement of technology, various online detection technologies and detection accuracy have been developed and improved. This guarantees the online monitoring of the chemical water treatment system of the powerhouse. This is useful for the prevention of water quality beforehand. It effectively ensures the long-term normal operation of the equipment.