Odor gas composition of sludge drying
Sludge odor is mainly composed of organic and inorganic waste gases (hydrogen sulfide, ammonia, methane, mercaptans, hydrocarbons, and other gases) generated by natural volatilization. Sludge odor has complex components, strong irritation, and great harm to human health.
1. SO2: It has a strong pungent odor and is the main component of acid rain. It is produced during high-temperature baking of coal-fired sludge. It is soluble in water, easily soluble in alkali, and easily oxidized. In the presence of nitrogen dioxide, it is extremely easy to produce SO42 biological washing.
2. H2S: Strongly cleaved neurotoxin that can stimulate humans at a slight concentration. H2S is acidic and has a double bond at 920 degrees. It is a polar molecule that can undergo a reverse reaction at a critical point of 30 ℃. It is soluble in water and is easily oxidized by strong oxidants (O3, H2O2), producing SO32 - and SO42 -.
3. NH3: It has a pungent odor, is weakly alkaline, belongs to a polar molecule, is easily absorbed by water, easily reacts with SO42 -, and is easily oxidized by H2O2.
4. CO2, CH4, colorless and odorless.
5. NOx: Easily soluble in water, producing acid rain (nitric acid, nitrate). Except for NO2, other nitrogen oxides are extremely unstable.
6. Mercaptans, etc.: (sulfur derivatives) Garlic odor, belonging to narcotic substances, flammable and explosive. If the monitored content reaches the lower limit of one fourth of the explosion-proof limit, front-end pretreatment should be taken.
7. Corpse amine and fecal amine: Animals, enzymes, and fungi decay and dry to produce mercaptans. Amines are weakly alkaline, and a small amount is soluble in water.
Treatment Technology of Sludge Odor and Waste Gas
Shanghai Zhongjing adopts the latest ZJ-NM-C superoxide ion nanobubble deodorization purification technology, which can completely decompose toxic and harmful substances in the odor gas, completely remove major pollutants such as hydrogen sulfide, ammonia, mercaptans, volatile organic compounds (VOC), inorganic substances, and various odors. The deodorization efficiency is the highest, and long-term operation is stable. After decomposition, the odor gas can completely achieve harmless emissions without generating secondary pollution.
Application of Ultrafine Nanobubble Technology in Waste Gas Treatment
After being stimulated by the physics of the environment (compression and expansion generated by the flow process of water, vortex flow, etc.), superoxide micro/nano bubbles will generate an ultra-high pressure of about 10 atmospheres and a limit reaction field of 4400 ℃ between molecules due to instantaneous (about 10-9 power seconds) adiabatic compression. The micro electricity of superoxide and active hydrogen oxygen, which are unique to the ionization phenomenon, can generate a large number of hydroxyl negative ions from water molecules in the air. The hydroxyl negative ions and the resulting hydroxyl free radicals have a strong decomposition ability, resulting in a large number of smaller diameter micro bubbles generated by the crushing effect, and exhibit characteristics such as ultrasound, electrification, retention, self pressurization, diffusion, and strong oxidation, Decomposition and elimination of organic compounds (VOCs) (chemical reactions), destruction and separation of the components of pollutants and suspension of the water surface, promote the conversion of some organic compounds (VOCs) into carbon dioxide and water, and the other part is mineralized to form granular sediment into water, with its characteristics of non combustion, non dissolution, and no toxicity. The removal rate of non methane total hydrocarbons, formaldehyde, benzene series, hydrogen sulfide, odor, and other organic substances (VOCs) is high.
·Super oxygen micro nano bubble process technology is advanced, without secondary pollution, low resource consumption, low greenhouse effect, stable and reliable operation of facilities, extremely low failure rate, simple maintenance, and low operating costs.
·Integrated design of machinery, electricity, water, and gas, integrated with electronic control devices, instrumentation, and compact structure, making it easy to combine with existing system facilities to improve the treatment effect of waste gas;
·Can handle a variety of organic waste gases. [Ethyl acetate, cycloacetone, NMP, DMAC, ammonia, trimethylamine, hydrogen sulfide, hydrogen methylsulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide, and styrene, sulfide H2S, VOC, and molecular chain structures of benzene, toluene, and xylene]
·Corrosion resistant, all overflow components are made of SUS304 stainless steel/316L stainless steel/PTEF material;
·Adopting industrial grade design, it can operate stably and reliably for 24 hours continuously;
·Intelligent control, CPU integrated control, online real-time monitoring of key process parameters such as flow, temperature, pressure, etc.
