Used for online instrument monitoring of hydrogen conductivity and color changing resin manufacturers

Used for online instrument monitoring of hydrogen conductivity and color changing resin manufacturers

SNT-001BSUsage method of color changing resin

This is a type of strong acidic cation exchange resin with indicator function, which can exchange with cations in water and has obvious color changing characteristics. Not only does it have obvious color changing characteristics (regenerated and failed types are rose red and yellow or blue, respectively), but its exchange ability is also stronger than ordinary resins. Mainly used to measure the cation conductivity of mixed bed effluent from steam and condensate water treatment, commonly used for monitoring the cooling water in power plant steam turbines, as well as in electronic instruments, food and pharmaceutical industries, and other fields.

When using color changing resin to measure the hydrogen conductivity of steam and condensate treatment mixed bed effluent, the resin is installed in a transparent exchange column with a diameter of 50mm. The cations in the water are exchanged and converted into hydrogen ions by the resin, greatly improving the sensitivity of monitoring cations in water. At the same time, the color changes significantly when the resin fails, indicating the working status of the exchange column.

To facilitate on-site monitoring.

1、 Performance indicator: SNT-001BS

Appearance: Dark green spherical particles

Particle size: (particle size 0.45~1.25mm) ≥ 95%

Exchange capacity: ≥ 5.10mmol/gd

Moisture content: 50-60%

Wet true density: 1.07-1.29g/ml

Wet visual density: 0.79~0.87g/ml

2、 Operating conditions:

Operating temperature: 100 ℃

Depth of bedding layer: 300mm

Operating flow rate: 1.0-3.0 BV/hour (BV: resin volume)

3、 After the resin fails, it can be poured out for collection and replaced with new resin to continue running.

Collecting more resin multiple times can regenerate it together.

Regeneration method:

1. After filling the resin, regeneration is carried out by using a hydrochloric acid solution with a concentration of 3-5% and a volume 3-5 times the volume of the resin

2. The regeneration flow rate is 0.5-2.0BV/hour. The acid passage time is more than 1 hour.

3. Then clean with desalinated water at a flow rate of 2-5 BV/hour. Wash to neutral pH for later use.

4. The general usage is minimal, and the labor cost of acid and desalinated water during regeneration is not worth the loss. The units of use are all based on one-time use.

Color changing cation exchange resin

Scope of use of color changing resin:

Monitoring and controlling the hydrogen conductivity of feedwater, condensate, and steam is an important means to ensure the quality of water vapor and control corrosion and scaling in the water vapor system of thermal power plants.

Due to the frequent changes in ammonia concentration and sampling flow rate in water vapor, as well as factors such as unit start-up and shutdown, it is difficult to determine when the H-type exchange column will fail. In the initial stage of H-type exchange column failure, due to the penetration of a small amount of ammonium ions, the measured hydrogen conductivity value is low; When the H-type exchange column * fails, a large amount of ammonium ions pass through, and the hydrogen conductivity measurement value is also higher. Therefore, when the failure of the exchange column causes a change in hydrogen conductivity, it is difficult to timely determine whether it is due to water quality deterioration or exchange column failure. The current solution adopted abroad is to use color changing cation exchange resin. The color of the failed layer is different from that of the non failed layer. It can be regenerated in a timely manner before the H-type exchange column fails, which can detect water quality deterioration problems in a timely manner and take timely measures to solve them.

Used for online instrument monitoring of hydrogen conductivity and color changing resin manufacturers
The products produced by the company include six major series of dozens of fine chemicals, including ion exchange resins, circulating water treatment agents, boiler auxiliaries, reverse osmosis membrane agents, atmospheric pollution control agents, and sewage treatment agents. They are widely used in the fields of steel industry, petrochemical industry, thermal power industry, papermaking industry, microelectronics industry, pharmaceutical industry, printing and dyeing industry, and three waste treatment
Classification and Physical Structure of Resin/

Ion exchange resins can also be classified into styrene based resins and acrylic based resins based on the type of their matrix. The types of chemically active groups in resins determine their main properties and categories. Firstly, it can be divided into two categories: cationic resin and anionic resin, which can respectively exchange ions with cations and anions in solution. Cationic resins are divided into strong acidic and weak acidic categories, while anionic resins are divided into strong alkaline and weak alkaline categories (or further divided into medium strong acid and medium strong alkaline categories).

ion exchange resin

　　physical structure

Ionic resins are usually divided into gel type and macroporous type. The polymer skeleton of gel resin has no pores in it when it is dry. It swells when absorbing water, forming very fine pores between large molecular chains, commonly known as visible micropores. The average pore size of the wet resin is 2-4 nm (2 × ^ fen ^ 10-6-4 × ^ fen ^ 10-6mm).

ion exchange resin

Ion exchange resins are more suitable for adsorbing inorganic ions, with a diameter of generally 0.3-0.6nm. These resins cannot adsorb large organic molecules, such as protein molecules with a diameter of 5-20nm, which cannot enter the micropores of these resins due to their larger size. Macroporous resin is made by adding pore forming agents during polymerization reactions to form a porous sponge like skeleton with a large number of micropores inside, and then introducing exchange groups. It coexists with micro pores and large pores, with a wetting resin pore size of 100-500nm, and its size and quantity can be controlled during manufacturing. The surface area of the pores can be increased to over 1000m2/g.

ion exchange resin

This not only provides good contact conditions for ion exchange, shortens the distance of ion diffusion, but also adds many chain link active centers, which can generate molecular adsorption through van der Waals attraction between molecules, and can adsorb various non-ionic substances like activated carbon, expanding its function. Some macroporous resins without exchange functional groups can also adsorb and separate various substances, such as phenolic compounds in chemical plant wastewater. Macroporous resin has many and large pores, large surface area, many active centers, fast ion diffusion and ion exchange, which is about ten times faster than gel resin. The use is fast and efficient, and the required processing time is shortened. Resin also has multiple advantages: resistance to swelling, resistance to fragmentation, resistance to oxidation, wear resistance, heat and temperature changes, as well as easy adsorption and exchange of organic macromolecules, making it highly resistant to pollution and easy to regenerate.

Ion exchange resins can be classified into styrene based resins and acrylic based resins based on the type of their matrix.