First, the chemical composition of waste gas:
In the chemical industry, the production facilities are complex and the treatment facilities are different. The treatment of waste gas plays an important role in the petrochemical industry. Chemical waste gas has the following characteristics:
1, flammable, explosive gas more. Such as low-boiling ketone, aldehyde, easily polymerized unsaturated hydrocarbons, etc., a large number of flammable, explosive gas without taking appropriate measures, easily lead to fire, explosion, great harm.
2, most of the emissions are irritating or corrosive. Such as sulfur dioxide, nitrogen oxides, chlorine, hydrogen fluoride and other gases are irritating or corrosive, in particular, the largest sulfur dioxide emissions, sulfur dioxide gas directly damage human health, corrosion of metals, buildings and sculpture on the surface, but also easily oxidized into sulfate Land, polluted soil, forests, rivers, lakes.
3, exhaust particles in the floating species, and great harm. Chemical production of exclusion of floating particles, including dust, smoke, acid mist, a wide range of environmental hazards. Especially when the floating particles and harmful gases exist simultaneously can produce synergies, more serious harm to people.
Second, the coking plant emissions components:
The main pollutants are benzene, aromatic hydrocarbons, aliphatic hydrocarbons, alkanes, phenols, H2S, naphthalene dust, ammonia and asphalt smoke, the pollutants are high concentrations of toxic and flammable and explosive gases.
Third, the refinery gas composition:
Main pollutants: volatile organic compounds (VOC), hydrocarbons, organic sulfides such as thiol sulfide, phenol, aromatic, low concentrations of inorganic sulfide hydrogen sulfide, ammonia, biochemical aeration oxygen, sewage Oxygen release gas, the decomposition of sludge released coke air-cooled open air-cooled distribution of stench, coking furnace combustion gas production from non-desulfurization and other stench.
Fourth, coal tar pitch gas composition:
Coal tar pitch is a by-product of coking, i.e. a black substance remaining in the distillation kettle after distillation of the tar. It is only the physical properties of refined tar are different, there is no clear boundaries, the general method of division is to provide softening point of 26.7 ℃ (cubic method) for the following tar, 26.7 ℃ above the pitch. Coal tar pitch mainly contains anthracene, phenanthrene, pyrene, etc., which are hardly volatile. These substances are toxic, and the properties of the coal tar pitch are different due to the different contents of these components. Temperature changes on the impact of coal tar pitch is very big, easy to brittle in winter, easy to soften in summer. Heating a special smell; heated to 260 ° C in 5 hours later, which contains anthracene, phenanthrene, pyrene, ■ and other components will be volatile out.
Second, the oil asphalt: Petroleum asphalt is crude oil distillation residue. According to the degree of refining, at room temperature into a liquid, semi-solid or solid. Petroleum asphalt black and shiny, with a high temperature. Because it was in the production process has been distilled to more than 400 ℃, which contains little volatile components, but there may still be a polymer of volatile hydrocarbons, these substances are more or less harmful to human health.
Fifth, the paint factory exhaust composition:
Toluene diisocyanate, dust, xylene, toluene, butanol, ethyl acetate, butyl acetate, trichlorethylene, benzene, acetone, cyclohexanone, ether and many other will produce exhaust gas. Simple point is alcohol, ketone, benzene, Learn about these chemicals before you go to understand the dangers of such chemicals.
sixth, rubber exhaust gas composition
The odor component of rubber exhaust gas is complex and changeable. Can be divided into five categories:
Hydrocarbons, such as alkanes, alkenes, alkynes, aromatic hydrocarbons; alcohols, phenols, aldehydes, ketones, organic acids, and so on. 1, containing H2S, SO2, mercaptans, thioethers; carbon black; amide, indole; The inorganic substances are H2S, SO2, carbon black, etc., the vast majority of malodorous gases produced by the original material for the organic material. These substances on human health hazards.
seventh,sewage treatment plant waste gas composition:
Exhaust gas: malodorous gas.
Stink is the odor emitted by garbage, the main components include hydrogen sulfide, ammonia, etc., mainly affecting air quality and stimulate people's sense of smell, etc.
Eight, waste gas treatment plant waste composition:
Domestic waste incineration flue gas control system standards than coal-fired boilers, oil boilers, coking furnace strict.
The main pollutants are dust, hydrogen chloride (HCl), sulfur dioxide (SO2), nitrogen oxides (NOX), carbon monoxide (CO), carbon monoxide, carbon monoxide and so on. (CO), hydrogen fluoride (HF), organic pollutants, dioxins and heavy metals.
Nine, pharmaceutical factory waste gas composition:
According to different pharmaceutical names: generally organic emissions, such as: aldehydes ,, olefins, organic amines, benzene series
tenth,the food processing plant waste gas composition:
The main components of thiophene derivatives, thiophene derivatives and chain thioether, esters, hydrogen sulfide, ammonia and other malodorous gases
eleventh, the printing plant waste gas composition:
Mainly toluene, benzene, ethyl acetate, butyl acetate, solvent oil 200, ethanol, butanol, etc., produced by the ink solvent.
twelfth,galvanized plant waste gas composition:
Galvanizing plant will generally release nitric acid, sulfuric acid, hydrofluoric acid and other gases.