I think everyone is familiar with chemical pollution. Chemical pollution refers to the waste gas and pollutants produced in the chemical industry production process. Most of these wastes are harmful above a certain concentration, and some are highly toxic substances, which will cause them to enter the environment. Pollution. Do you know what chemical waste gas is? Chemical waste gas comes from toxic and harmful gases discharged from chemical plants in chemical production. The composition of chemical waste gas produced by different chemical production industries varies greatly. There are many types of pollutants, complex physical and chemical properties, and different toxicity, which seriously pollute the environment and affect human health.
Today we are going to talk about what are the components of chemical waste gas? What are the characteristics? What are the technological processes and which chemical pumps are used in the process?
1. Chemical waste gas components generally fall into three categories:
(1) Nitrogen-containing compounds, such as ammonia, amines, nitriles, nitro compounds and nitrogen-containing heterocyclic compounds.
(2) Carbon, hydrogen or compounds composed of carbon, hydrogen, and oxygen (lower alcohols, aldehydes, fatty acids, etc.).
(3) Sulfur-containing compounds, such as hydrogen sulfide, mercaptans, dimethyl sulfide, thioethers, and sulfur-containing heterocyclic compounds.
The eight malodorous substances that have a major impact on the human body are: hydrogen sulfide, ammonia, trimethylamine, methyl mercaptan, methyl sulfide, carbon disulfide, styrene, and dimethyl disulfide. The foul gas we usually refer to refers to the gas with foul smell diffused in the air.
2. What are the characteristics of chemical waste gas?
(1) Most of the emissions are irritating or corrosive. Gases such as sulfur dioxide, nitrogen oxides, chlorine, hydrogen fluoride, etc. are all irritating or corrosive, especially sulfur dioxide emissions are the largest, sulfur dioxide gas directly harms human health and corrodes metals.
(2) There are many types of floating particles in the exhaust gas, which are harmful. The floating particles discharged from chemical production include dust, flue gas, acid mist, etc., and there are many kinds of them that are harmful to the environment.
(3) There are more flammable and explosive gases. Such as low-boiling ketones, aldehydes, easily polymerized unsaturated hydrocarbons, etc., large amounts of flammable and explosive gases, if appropriate measures are not taken, are likely to cause fire and explosion accidents and cause great harm.
3. What are the chemical waste gas treatment processes and which chemical pumps are used to transport liquids through the treatment system?
(1) Treatment process
a) Considering the operating cost and safety of the treatment, the process route of this plan adopts "ventilation system (fan, collection cover, pipeline) + pretreatment system (water spray tower + caustic washing tower) + core purification system (UV photolysis purification) Equipment)" for chemical waste gas treatment.
b) Introduction to chemical waste gas treatment process
First: the chemical waste gas enters the pretreatment system (washing tower-common chemical pumps: LHF fluorine-lined centrifugal pump, LSB fluorine plastic centrifugal pump, etc.), the water-soluble waste gas in the waste gas is fully absorbed by washing, and then enters the next process.
Second: The chemical waste gas enters the pretreatment system (alkali scrubber-common chemical pumps: LHJ stainless steel wear-resistant alkali pump, LHC fluorine-lined magnetic pump, etc.) to remove sulfur compound waste gas, and then enter the next process.
Third: The exhaust gas enters the core purification system (UV photolysis purification equipment-common chemical pumps: LMU corrosion-resistant and wear-resistant slurry pumps, etc.). UV photolysis purification equipment cracks the sludge odor, and at the same time decomposes oxygen and produces ozone. The ozone and organic molecular cracking products undergo oxidation-reduction reactions, and finally carbon dioxide, water and other substances are generated, and then discharged through the pipeline at high altitude
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