Odor composition of sludge drying

    Sludge odor is mainly composed of organic waste gas and inorganic waste gas (hydrogen sulfide, ammonia, methane, mercaptan and hydrocarbon) produced by natural volatilization. Sludge odor is characterized by complex composition, strong irritation and great harm to human body.

    1. SO2: strong pungent odor, the main component of acid rain, coal-fired sludge will be produced in high temperature baking, soluble in water, easily soluble in alkali, easily oxidized, in the presence of nitrogen dioxide, it is very easy to produce SO42 - biological washing.

    2. H2S: a neurotoxin with strong cleavage. It can stimulate people at a slight concentration. It is acidic and has double bonds with 920 angles. It is a polar molecule. It can reverse reaction at the critical point of 30 ℃. It is soluble in water and is easily oxidized by strong oxidants (O3 and H2O2) to produce SO32 - and SO42 -.

    3. NH3: pungent odor, weakly alkaline, polar molecule, easy to be absorbed by water, easy to react with SO42 - and easy to be oxidized by H2O2.

    4. CO2, CH4, colorless and tasteless.

    5. NOx: easily soluble in water, producing acid rain (nitric acid, nitrate). Except NO2, other nitrogen oxides are very unstable.

    6. Mercaptan: (sulfur derivatives) garlic smell, belongs to narcotic substances, flammable and explosive, if the monitoring content reaches one fourth of the explosion-proof limit, the front-end pretreatment should be taken.

    7. Cadaverine, faecal amine: animals, enzymes, fungi decay, drying to produce mercaptan, amines are weakly alkaline, a small amount of soluble in water.

Treatment technology of sludge odor waste gas

    Shanghai Zhongjing adopts the latest zj-nm-c superoxide ion nano bubble deodorization purification technology, which can completely decompose the toxic and harmful substances in the odor gas, and can completely remove the main pollutants such as hydrogen sulfide, ammonia, mercaptans, volatile organic compounds (VOC), inorganic compounds, etc., as well as all kinds of odor. The deodorization efficiency is the highest, and the long-term operation is stable, It can completely achieve harmless discharge without secondary pollution.

Application of ultra micro nano bubble technology in waste gas treatment

    Stimulated by the physical environment (compression and expansion of water flow process, vortex flow, etc.), superoxide micro nano bubbles will produce an ultra-high pressure of about 10 atmospheres and an ultra-high temperature limit reaction field of 4400 ℃ between molecules due to the instantaneous adiabatic compression (about 10-9th power seconds). Superoxide and active hydrogen oxygen, which are characteristic of ionization phenomenon, can generate a large number of hydroxyl anions from water molecules in the air. Hydroxyl anions and hydroxyl radicals have strong decomposition ability. A large number of microbubbles with smaller diameter are produced by crushing effect, and they show ultrasonic, electrification, retention, self pressurization, diffusion and other characteristics Strong oxidation and other characteristics, the decomposition of organic compounds (VOCs) (chemical reaction), the composition of pollutants will be destroyed and separated and suspended on the water surface, prompting part of organic compounds (VOCs) to be converted into carbon dioxide and water, the other part to be mineralized to form particles and sink into the water, its characteristics are not burning, insoluble and non-toxic. The removal rate of non methane total hydrocarbon, formaldehyde, benzene series, hydrogen sulfide, odor and other organic compounds (VOCs) is high.

    ● The technology of superoxide micro nano bubble is advanced with no secondary pollution, low resource consumption, low greenhouse effect, stable and reliable operation of facilities, extremely low failure rate, simple maintenance and low operation cost.

    ● Integrated design of machinery, electricity, water and gas, electric control device and instrument are integrated, the whole machine is compact in structure, which is easy to be combined with the existing system facilities for transformation, so as to improve the treatment effect of waste gas;

    ● It can process many kinds of organic waste gas【 Ethyl acetate, cycloacetone, NMP, DMAC, ammonia, trimethylamine, hydrogen sulfide, methylthiol, methylthioether, dimethyl disulfide, carbon disulfide and styrene, sulfides, H2S, VOCs, molecular chain structure of benzene, toluene and xylene]

    ● Corrosion resistant. The flow passage parts are made of SUS304 stainless steel / 316L stainless steel / PTEF;

    ● Industrial grade design is adopted to ensure 24-hour continuous operation, stable and reliable;

    ● Intelligent control, CPU integrated control, online real-time monitoring of flow, temperature, pressure and other key process parameters.