Saint Wen environmental VOCs governance

Volatile Organic Compound is referred to as VOCS. Volatile organic substances are numerous, unstable, and ubiquitous. They include artificial chemical compounds and are naturally produced. Most volatile organic compounds (VOCS) are transmitted in the form of steam. Emissions of volatile chemically synthesized organic compounds (VOCS) in the United States are subject to legal restrictions. Harmful volatile organic compounds are usually not acutely toxic, but have an impact on health over a longer period of time. Since the concentration is usually low, the development of symptoms is usually slow, and studies on volatile organic compounds and their effects are difficult.

The World Health Organization ranks VOCs in three levels: very unstable (VVOC), volatile (VOC), and semi-volatile (SVOC). For example, a very unstable chemical is propane, one volatile is formaldehyde, and one semi-volatile is benzene, a flame retardant. The most volatile ones have a relatively low boiling point and are often difficult to measure because they are in the air.

Health effects include the eyes, upper respiratory tract, lungs and skin. The following symptoms exist: dry eyes, tingling, tearing, and redness. The upper respiratory tract is itchy, stinging, stuffy, and sneezing. Pulmonary edema, wheezing, dry cough, bronchitis. The skin is red and dry and itchy. Some organisms can cause cancer in animals; some are suspected or known to cause cancer in humans.

The ability of organic chemical raw materials to cause health effects comes from those that are highly toxic. The extent and nature of other contaminants' effects on health will depend on many factors, including the exposure time and length of exposure. Eye and respiratory irritation, headache, dizziness, visual impairment, and memory impairment are some of the symptoms that are experienced immediately after exposure to certain organisms.

   VOCS is outdoor from fuel combustion, industrial waste gas generated by transportation, automobile exhaust, solvent... indoors it comes from combustion products such as coal, natural gas, smoke from smoking, heating and cooking, construction and decoration materials, furniture , household appliances, detergents and the body's own emissions.

　　　Industrial VOCs treatment covers catalysis, carbon adsorption, condensation, membrane separation...but as a partner in the safety equipment for VOCs recycling equipment in industrial production areas, 1-1.jpg Shengwen Environmental has been working hard to control emissions for various industrial environments. Provide reliable and efficient safety equipment. We offer a "pilot-operated breathing valve" which is an iconic device to improve existing air problems. It has a wide pressure setting range and excellent back pressure balance and the ability to instantly open, and inherits the excellent sealing performance of the traditional breathing valve. Until today 1-1.jpg Shengwen Environmental's products are still innovating continuously. The exploration of the excellent performance of our products has enabled us to have a high degree of enthusiasm and continue to provide high standards of service for our customers.

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活性炭吸附过滤器

Vox exhaust gas treatment equipment activated carbon adsorption filter, also known as activated carbon adsorption device, is an environmental protection device for exhaust gas filtration and adsorption of odor, which is made of stainless steel, carbon steel, PP plate, etc., and further removes mechanical filter by using granular activated carbon. The residual residual chlorine, organic matter, and suspended matter in the effluent provide good conditions for subsequent reverse osmosis treatment. Activated carbon has the functions of removing harmful gases such as formaldehyde, benzene and TVOC, and disinfecting and deodorizing. Therefore, the activated carbon adsorption filter has a good effect on purifying gases.

A: Introduction to the principle of activated carbon filter for voc exhaust gas treatment equipment

1. Activated carbon, which has many micropores and a large specific surface area, relies on molecular attraction and capillary action to adsorb solvent vapor and volatile substances on its surface, and uses steam to separate adsorbed substances according to the boiling point of different substances. When the steam is used as the desorption medium, the desorbed organic solvent vapor is condensed with the water vapor through the condenser, and is separated into the separation barrel to be recovered to recover the organic solvent. The residual liquid is discharged after aeration treatment.

2. The adsorption capacity of activated carbon depends on: iodine value, butane value, ash, bulk weight, etc.

1): Iodine value: (400-1300) The iodine value refers to the amount of iodine adsorbed by activated carbon in a 0.02 N 12/KL aqueous solution. The iodine value is associated with the pore surface area greater than 10 A in diameter. The price of activated carbon is high and low, and the iodine value is one of the criteria for judging. Activated carbon with high iodine value is better. It works better.

2): Butane value

Butane value refers to the amount of butane adsorbed per unit weight of activated carbon after saturated air and butane pass through the carbon bed at a specific temperature and pressure.

3): Ash (6-16)

There are two kinds of ash powder of activated carbon, one is surface ash powder, and the other is internal ash powder. The ash powder of activated carbon is usually referred to as internal ash powder.

4). Moisture (<5)

 Moisture is a measure of how much water is contained in the carbon, that is, the weight of the adsorbed water in the activated carbon.

Two: voc waste gas treatment equipment activated carbon filter parameters:

Working pressure: <0.6Mpa

Hydraulic test: 0.75Mpa

Influent turbidity: <2mg/L

Working temperature: 5-40 °C

Operating flow rate: 8 ~ 10m / h

Backwashing strength: 12~16L/m2·s

Packing height: 1400mm

The smallest model of activated carbon filter is: QC-HXT400, his tank size: φ400×2350 (mm), treated water volume: ~1 (m3 / h), filtered in/out water backwash/inlet interface size: 32 /33 (mm), running weight is 0.48 (t).

The largest model is: QC-HXT3600, his tank size: φ3600×5880 (mm), treated water: ~100 (m3 / h), filtered inlet / outlet water backwash / inlet interface size: 250 / 250 ( Mm), running weight is 7.00 (t).

Three: The scope of activated carbon filter:

The device is widely used in wire and cable production, electronic original production, pickling operations, laboratory exhaust, metallurgy, chemical, pharmaceutical, painting, food, brewing and other organic waste gas treatment. The utility model has the advantages of high adsorption efficiency, wide application range, convenient maintenance, and simultaneous treatment of various mixed exhaust gases.

Four: activated carbon filter features:

The main body of the equipment is a cylindrical steel structure with upper and lower elliptical heads. The filter material is Q235-A or 304 stainless steel, which is lined with vulcanized rubber for anti-corrosion. The inside is equipped with a water distributor at the water inlet, and the lower part is provided with a water collecting device and a water collecting device. Filled with 1200 mm of activated carbon and 200 mm of quartz sand. The external device of the complete set of equipment has various control valves and flow meters and pressure gauges.

The activated carbon filled with activated carbon filter is a shell carbon, which has the advantages of light specific gravity, large porosity, strong wear resistance and large adsorption capacity. Fill in the following:

Activated carbon 0.6-1.2mm 1100mm

Quartz sand 0.6-1.2mm 100mm

Quartz sand 1.2-2.0mm 100mm

Five: Precautions for use:

1: The working conditions of styrene, ethylene, acrylic acid and other polymeric components are not recommended;

2: Exhaust gas containing unstable ketones, not recommended, oxidation reaction will occur, flammable;

3: Gases containing phenols are not recommended;

4: Contains glycols, ammonia is not recommended;

5: Gas containing high boiling point is not recommended;

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A: The technical principle of UV photolysis organic waste gas purifier

1. The exhaust gas is sprayed and washed by the biological enzyme washing tower. Its main function is to remove the dust and large lacquer particles, and at the same time have a certain physical dissolution and masking effect. A small amount of water-insoluble organic pollutants are chemically removed from the natural biological enzymes, and the biological enzymes contain highly reactive functional group compounds and terpenoids, which are atomized into smaller diameter gas molecules. Due to the small diameter, the specific surface area is increased, the specific surface effect is increased, and the activity is strong. Distributed in the air of the polluted area, colliding with airborne odor molecules and generating chemical shifts in the collision. After the exhaust gas is treated by the spray washing tower, the exhaust gas enters the photo-hydrogen ion tower, and the internal structure of the photo-hydrogen ion tower is a photo-hydrogen ion catalytic oxidation device. The photo-hydrogen ion catalytic oxidation device can generate a large number of high-energy ionic agent reactive groups, varnish, benzene, toluene, xylene, resin, methyl ethyl ketone, aldehyde, additives, etc. and the oxidation of the generated holes and the ability to reduce free electrons. Titanium dioxide reacts with H2O and O2 which are in contact with the surface to produce radicals with strong oxidizing power. These free radicals can decompose almost all organic substances, turning hydrogen and carbon contained therein into water and carbon dioxide.