Asphalt smoke emissions come from a wide range of sources, including:

(1) Industrial thermal processing processes such as coking and refining that produce asphalt;

(2) The process of heating asphalt to produce asphalt products;

(3) The process of heating asphalt to lay roads, repair houses, or use as anti-corrosion coating;

(4) The process of heating or burning asphalt products, petroleum, bituminous coal, wood, and oil shale containing asphalt.

Characteristics of Asphalt Waste Gas

(1) The characteristic of asphalt smoke is that it is easy to adhere and can easily explode at a certain temperature. During the collection, transportation, and smoke suppression process of asphalt smoke, it is highly likely to adhere to the surface of pipelines and equipment, forming liquid to solid asphalt. The solidified asphalt is difficult to remove, often causing pipeline blockage and equipment damage, making the system unable to operate normally.

(2) The composition of asphalt smoke is extremely complex and varies with different asphalt sources. Asphalt smoke contains both solid and liquid particles formed by the condensation of asphalt volatile components, as well as organic matter in vapor form. Some of the organic matter is high molecular weight polymers, which can cause serious pollution to the environment.

(3)  Smoke contains various organic compounds, including cyclic hydrocarbons, cyclic hydrocarbon derivatives, and other compounds, which have harmful effects on human health.

(4)  Asphalt smoke contains various polycyclic aromatic hydrocarbons such as benzo [a] pyrene, benzo [a] anthracene, and carbazole, most of which are carcinogenic and strongly carcinogenic substances. The particle size is mostly between 0.1-1.0 μ m, with the smallest being only 0.01 μ m and the largest being about 10.0 μ m. It is a variety of carcinogenic substances represented by 3,4-benzo [a] pyrene. The main way it endangers human health is by attaching to dust particles below 8um and being inhaled into the body through the respiratory tract.

Activated carbon adsorption scheme

When exhaust gas enters the adsorption box and enters the activated carbon adsorption layer, due to the presence of unbalanced and unsaturated molecular gravity or chemical bonding forces on the activated carbon adsorption surface, when the surface of the activated carbon adsorbent comes into contact with the gas, it can attract gas molecules, causing them to concentrate and remain on the solid surface. This phenomenon is called adsorption. By utilizing the adsorption capacity of activated carbon adsorbent surface, the exhaust gas is brought into contact with the porous activated carbon adsorbent on the large surface. The pollutants in the exhaust gas are adsorbed on the surface of the activated carbon, separated from the gas mixture, and the purified gas is discharged at high altitude.

FEATURES

(1) High adsorption efficiency and strong adsorption capacity

(2) It can simultaneously treat multiple mixed organic waste gases with high purification efficiency

(3) Small footprint, simple maintenance and management, and low operating costs

(4) Strong adaptability, fully sealed indoor and outdoor use, wide applicability

(5) Adopting an automated control operation design, the operation is simple and safe

scope of application

Activated carbon adsorption technology is widely used in industries such as petroleum, chemical, rubber, coating, printing, electronics, pharmaceuticals, textile printing and dyeing, food, furniture, coating, plastics, feed, leather, machinery, semiconductor manufacturing, and material synthesis for low concentration and high air volume exhaust gas treatment.

UV Photolysis Purification Solution

UV photocatalytic waste gas treatment technology refers to the use of high-energy UV beams to decompose oxygen molecules in the air to produce free oxygen (i.e. reactive oxygen species). Due to the imbalance of positive and negative electrons carried by free oxygen, it needs to combine with oxygen molecules to produce ozone, which has strong oxidizing properties. Through the synergistic photocatalytic oxidation of organic waste gas and odorous gases by ozone, organic waste gas and odorous gas substances are degraded and converted into low molecular compounds, water, and carbon dioxide.

FEATURES

(1) Efficient Odor Removal: It can efficiently remove major pollutants such as volatile organic compounds (VOCs), inorganic substances, hydrogen sulfide, ammonia, thiols, as well as various odorous gases. The deodorization efficiency can reach over 95%, exceeding the national odor pollutant emission standards (GB14554-93) issued in 1993 and the comprehensive emission standards of atmospheric pollutants (GB16297-1996) issued in 1996.

No pre-treatment required: Organic gases do not require special pre-treatment, such as heating, humidification, etc. The equipment can work normally in an environment temperature between -30 ℃ and 95 ℃, humidity between 30% and 98%, and pH value between 2-11.

（2） No need to add any substances: just set up corresponding exhaust pipes and exhaust power, so that odorous gases and industrial waste gases can be deodorized, decomposed and purified through UV photolysis waste gas purification equipment, without adding any substances to participate in chemical reactions.

(3) Strong adaptability: It can adapt to the deodorization and purification treatment of different industrial waste gases with low and medium concentrations, and can work continuously 24 hours a day, with stable and reliable operation.

(4) Low operating cost: no mechanical action, no noise, no need for dedicated management and daily maintenance, only regular inspections, low equipment energy consumption, low equipment wind resistance<50pa, can save a lot of exhaust power energy consumption.

(5) Safety and reliability: Due to the use of photolysis principle, the module adopts explosion-proof treatment, eliminating safety hazards, and has high fire, explosion, and corrosion resistance performance. The equipment performance is safe and stable, especially suitable for industries with high explosion-proof requirements such as oil (gas) fields, petrochemicals, and pharmaceuticals.

Application scope

Purification treatment of malodorous gases and industrial waste gases such as printing plants, printing and dyeing plants, electronic plants, plastic plants, paint plants, furniture plants, oil refineries, rubber plants, chemical plants, paper mills, leather plants, pesticide plants, pharmaceutical plants, paint plants, fertilizer plants, food processing plants, feed plants, essence and spice plants, slaughterhouses, sewage treatment plants, waste transfer stations, spray painting, etc.

Catalytic combustion scheme

Regenerative thermal oxidation technology heats organic waste gas to above 760 ℃ to oxidize and decompose VOCs in the waste gas into carbon dioxide and water. The high-temperature gas generated by oxidation flows through a specially designed ceramic heat storage body, causing the ceramic body to heat up and "store heat", which is used to preheat the organic waste gas that enters later. Thus saving fuel consumption for exhaust gas heating.

FEATURES

（1） High concentration exhaust gas treatment achieves self heating combustion with low operating costs and reasonable cost-effectiveness.

(2) High purification efficiency, with a three chamber RTO of up to 99.5%.

（3） Using ceramic thermal storage as the heat energy recovery system, preheating and thermal storage alternate operation, with a thermal efficiency of ≥ 95%.

(4) The steel structure of the furnace body is reliable, the insulation layer is thick, the operation is safe and reliable, and the stability is high.

(5) PLC programmable automation control, high degree of automation.

(6) Wide applicability, can purify any organic waste gas

(7) Waste heat utilization has high economic benefits, and excess heat energy is reused in drying rooms, ovens, etc. The heating of the drying room does not require additional fuel or electricity consumption.

scope of application

The petroleum, chemical, plastic, rubber, pharmaceutical, printing, furniture, textile printing and dyeing, coating, coatings, semiconductor manufacturing, synthetic materials and other industries generate medium to high concentration and high air volume organic waste gas treatment. The types of organic substances that can be treated include benzene, phenols, aldehydes, ketones, ethers, esters, alcohols, hydrocarbons, etc.