Activated carbon filter

The role of the activated carbon filter is to remove macromolecular organic matter, iron oxides, chlorine. Organic matter, chlorine, iron oxides easy to make ion exchange resin poisoning, chlorine, cationic surface active agent will not only make the resin poisoning, but also destroy the membrane structure, so that the failure of the reverse osmosis membrane.

The active carbon filter is the use of activated carbon having a rich pores on the macromolecular organic matter in the water, chlorine, iron oxide colloid adsorption filter, this absorption is not reversible, i.e., activated carbon saturated adsorption capacity, once saturated adsorption, activated carbon loss of adsorption performance, can not be the backwash method rushed pollutants. In addition, activated carbon adsorption of organic matter, bacteria rich in nutrition, resulting in a large population of bacteria within the activated carbon filter, but increased the microbial content of the water by activated carbon filter.fabric filter

Before activated carbon adsorption saturation, backwash on a regular basis to a large number of bacteria group out of the surface of activated carbon and suspended solids. They should immediately replace it with a new activated carbon, activated carbon adsorption saturation, otherwise it will cause irreparable damage of the reverse osmosis membrane.

Water Softener

The role of the water softener is the removal of calcium and magnesium ions, the water is softened. If no softener or softener VALID, calcium, and magnesium salts in the surface of the reverse osmosis membrane is formed due to a sharp rise in the concentration of the water-insoluble precipitate, plugging the hole of the reverse osmosis membrane, the reverse osmosis membrane life shortened.bag filter manufacturers

Built water softener for ships with a sodium cation exchange resin, the exchange resin is saturated with brine regeneration. Resin degree of fragmentation is getting worse after a few years of use, gradually lose the ability to soften. Especially when the active carbon filter saturation adsorption but not timely replacement of activated carbon in raw water iron, organic matter, chlorine directly into the water softener resin poisoning, poisoning, the resin will not be able to use renewable way to restore activity, , replace the resin when the resin exchange capacity decreased.

Pure water equipment selection and maintenance of the filter

The face of the market a wide range of assortment of pure water equipment, we should be how to choose and maintain water equipment?fabric filter

Strainer by the size of the filtered water, the most common sand filter, non-woven filter filter and PP fiber filter, filter, the nonwoven filter and the length of the PP fiber filter is the most commonly used 10-inch and 20-inch two, as a coarse filter with a pore size of the filter should generally be about 25u.

The role of the coarse filter is to remove suspended impurities larger particle size in water, to avoid these impurities into the activated carbon filters, covering the surface of the activated carbon, the pore structure of activated carbon adsorption of impurities in the water is lost.bag filters

Strainer with the rejection of solid impurities increase the resistance sharply rises, the water flow is gradually decreased. Without timely treatment, can not meet the water flow requirements for follow-up treatment processes. Sand filter, pressure increases to a certain extent after backwash. Backwash some fine sand out of the filter, sand filter should be regularly supplemented with sand, sand after repeated backwash, the degree of fragmentation increases, at the same time each backwash impossible to rinse sand the remaining sludge is gradually increased, the sand will appear the phenomenon of "compaction", you should replace the sand. Non-woven or PP fiber filter, filter pore clogging generally difficult to rinse with water, shall replace the filter on a regular basis.

Poor quality filter to the leaky roof

Hwang In September 2011, a contract Lu'an City, a health center transformation of central air-conditioning installation work, the end of the project on schedule, the filter product quality due to run in Wang the MassMutual building materials firm purchased a serious failure, resulting in the health a large area of the top surface of the Hall leaks, resulting in the hall carpet, bar, roof, lighting and other related facilities severely damaged. The club to court Hwang compensation for the loss of 2.5 million. Judge mediation, Hwang voluntary compensation for the loss of 18,500 yuan of the health center fee, insurance companies in the quality of products liability insurance coverage compensation of 6,500 yuan.belt filters

Hwang after the query is understood that the filter in the the MassMutual building materials firm purchased by Zhejiang Yuhuan, Pu Yi Copper Co., Ltd.. Hwang advance their own losses caused due to substandard products was very upset, recently filed to Lu'an City Yuan District Court his right of recourse in disputes, asked Wang Yuhuan, Pu Yi Copper Co., Ltd. to pay its advance compensation payments 1.85 million.dust filter bags

After an investigation, the judge believes that the filter failure resulting in property damage, mainly due to the quality of the product itself there is a problem, but the plaintiff Hwang installation of impropriety is also a factor. Mediation by the court, the defendant the MassMutual building materials firm operators Wang compensation Hwang product quality loss of 1500 yuan; defendant Yuhuan, Pu Yi Copper Co., Ltd. compensation Hwang mass loss of 8500 yuan.

Principle of air filters

Collision and stick

Dust particles in the air, or coasting with the flow, or do random motion, or by some kind of field force and movement. When the movement of the particles hit the obstacle, the van der Waals forces between the particles and the obstacle surface so that they stick together.air filter bag


Fiber filter material
The filter material should be able to: effectively intercept dust particles, the air flow without much resistance. Non-woven fibers and special paper meets this requirement. Intricately interwoven fibers formed numerous dust barrier between the fibers spacious space allows air flow through smoothly.

The principle of inertia

Inertial motion of large particles in the gas stream. Airflow Obstacle bypass particles deviate from the direction of air flow due to inertia and hit the obstacle. The larger the particle, the stronger the force of inertia, the greater the possibility of colliding with obstacles, so the better the filtering effect.

Diffusion theory

Small particles random Brownian motion. For mathematical processing of the irregular movement and mass diffusion theory, diffusion theory said. The smaller the particles, the random motion of the more dramatic, the more chance of colliding with obstacles, so the better the filtering effect.bag filter

Efficiency varies with the size of dust particles
The filters trap amount of dust and unfiltered the ratio of the amount of dust in the air is "filtration efficiency". Less than 0.1um (micron) particle for diffusion motion, the smaller the particle, the higher the efficiency; greater than 0.5um particles for inertial motion, the larger the particle, the efficiency of Zhao Gao. Between 0.1 ~ 0.3um, the efficiency of a the lowest point, the particle size of dust, the most difficult to filter.

Resistance

Fiber bypass airflow, resulting in a slight resistance. Resistance of numerous fiber is the filter resistance. Filter resistance increased with increasing gas flow through the filter of the relative wind speed can be reduced by increasing the area of ​​the filter material, to reduce the resistance of the filter.

Dynamic performance

The dust capture additional resistance to air flow, so, use the filter gradually increasing resistance. Capture dust filter media together as one to form a new obstacle efficiency of filtering, a slight improvement.

And capture most of the dust gathered in the windward side of the filter material. Greater filter area, more dust can accommodate, the longer the life of the filter.

End-of-life of the filter

More dust filter, the greater the resistance, filter life coming to an end when the high resistance to design not allowed. Sometimes, too much resistance causes the filter to capture dust flying, this risk, the filter and the scrap.

Static electricity

If the filter material with electrostatic powder with electrostatic filter effects can be significantly improved.

The reason: the static electricity the dust trajectory and make changes into obstacles, static electrostatic force stuck.

Removing the air filter

Weird weather but also to the breeding ground for bacteria, especially the part of the home split air conditioner indoor unit, Austrian Zhejiang Electric Co., Ltd., filters, heat sink and out of the wind wheel on the buildup of dust and dirt. These dust is not only a breeding ground for harmful bacteria, to produce odor also seriously affected the air quality. Traditional air conditioning, cleaning can simply rinse filter, wipe the surface of the evaporator, PAM gap on the air conditioning evaporator and air supply system can not wash thoroughly, inside the evaporator is clogged with dust is the most serious, most likely to breed bacteria, viruses place. belt filters
The researchers detected within the air-conditioned including Legionella bacteria, Escherichia coli, Staphylococcus aureus, and other pathogenic viruses and bacteria. The easiest approach is to directly buy air conditioning disinfectant treatment. The research shows that nearly 90% of home air conditioning excessive bacteria. In addition, a long stay in air-conditioned environment, easy to suffer from the "Air conditioning disease". "Air conditioning disease" accompanied by dizziness, fatigue, nausea, stuffy nose and other symptoms. Only deep cleaning air conditioning can greatly reduce the parasitic viruses and bacteria. filter fabric
The specific method is: Select a dry and sunny day, the air conditioning function keys of operation 3-4 hours in the air state PAC, so that the air conditioning internal moisture distribution dry. Then turn off the air conditioning, polyacrylamide, unplug the power cord, air-conditioned enclosure dirt with a soft, dry cloth to wipe, can also be cleaned with warm water, but do not scrub with hot water or flammable oil, chemicals. At the same time, remove the air conditioning filter, clean the filter with disinfectant, dry reload air conditioning. When the outdoor unit is clean, rinse with water the outdoor condenser surface, to be dry after the hood cover other parts of the non-water.

How to choose the baghouse filtration velocity

Baghouse filtration velocity size determines the size of the baghouse overall operating efficiency and cost. Therefore, we have to understand how to select the size of the filtration velocity.

Filter the size of the wind speed is mainly determined by the traits of dusty gas, fabric categories as well as the nature of the dust, under normal circumstances are selected in accordance with the dust removal equipment recommended sample data and practical experience of the user. Pulse baghouse filtration velocity of about 1.2 to 2m / s, glass fiber bag filter filtration velocity of approximately 0.5 to 0.8 m / s. The main selection parameters are the following.fabric filters

A. Type cleaning method according to the different types of dust

Carbon black, silica (white carbon), aluminum, zinc sublimate remaining gas in the gas formed due to condensation and chemical reaction solution, activated carbon is discharged from the cement kiln cement. Filtration velocity of 0.25 to 0.40.3 to 0.50.33 to 0.600.8 to 1.2 m / s.

Sublimate of iron and ferroalloys, foundry dust, alumina, cement mill discharge cement, the carbonization furnace Cheung Wah matter, lime, corundum, plastic, iron oxide, coke, coal. The filtration velocity 0.28 to 0.450.4 to 0.650.45 to 1.01.0 to 2.0 m / s.

Talc, coal, blast cleaning dust, fly ash, ceramic production of dust, carbon black (secondary processing), a pigment, kaolin, limestone, mineral dust, bauxite, cement (from the cooler). The filtration velocity 0.30 to 500.50 to 1.00.6 to 1.21.5 to 3.0 m / s.

II. According to the number of bags

Calculated the total filtration area and the area of ??the single dust bag, you can calculate the bag number. If the the bag room number of each bag is determined, you can also calculated the entire precipitator room number. Although the the precipitator design or selection in the need to determine the number of rooms, but the site layout and easy maintenance considerations, often more than six rooms in addition to sitting room as the double row. Less than 5 chamber precipitator of each chamber is given as a single row.dust filter

Selected parameters, dusty gas flow, the nature of the concentration and dust dispersion, wettability, viscosity, etc. In addition to the above two are selected the baghouse filter wind speed parameters. Understand these parameters, we can easily select the size of the baghouse filter wind speed in order to improve the operating efficiency of the dust collector, thereby reducing costs.

The commissioning steps before the bag pulse dust collector is running

Pulse jet bag filter industrial wider application of a dust removal equipment, it is more advanced in cleaning technology. Deal with large amount of wind, small footprint, high purification efficiency, reliable operation, simple structure, small amount of maintenance features, its collection efficiency can reach more than 99% efficient dust removal equipment. Pulse jet bag filter is put into operation, the various components of the equipment needed for testing, debugging. The specific debugging steps:fabric filters

Step 1: Check the transmission part (ash body) of a foreign body, and then turn on the wind power switch, check the direction of rotation of the airlock, ranked ash auger runs smoothly without abnormal noise, to ensure the normal operation of the time by observing not less than 0.5 hours.

Step 2: Check the support of the process piping connection is stable solid, and check the filter bag installation is solid, has good sealing.

The third step: Make sure the power and air supply connections are correct on, open the pulse controller checked in order to verify the line of control and digital display connection order of the solenoid valve, confirm the solenoid valve according to the sequence of actions is correct.bag filter manufacturers

Step 4: observe the operation of the solenoid valve is sensitive and reliable switching sound is clear disorder phenomenon, the injection time of the pulse valve opening degree is consistent.

Step 5: Debug after the power is turned off, the gas source, close the control valve and check the security of the field devices. After some testing work is completed can be confirmed and put into use.