Odor gas spray tower, organic waste gas spray absorber
Device description;
As a new type of spray absorption equipment, it has been widely used in the purification of waste gas. The concept of fluidized bed is developed to the vapor liquid mass transfer equipment, so that the packing in the spray tower is in the state of fluidization, so that the mass transfer process can be enhanced. Its characteristics are: high gas velocity, large capacity, light weight, relatively uniform distribution of liquid vapor, not easy to be blocked by solid and viscous materials. Especially since the column turbulence strongly, so the quality and energy transfer can be enhanced, which can greatly reduce the tower diameter, reduced height. The tower volume is large, empty tower gas velocity of 1.5 ~ 6.0m/s, 20 ~ 110m3/ spray density (M2 - H), the pressure loss of 1500 ~ 3800Pa, the fog device adopts a swirl plate demister in the washing tower, the gas produced by plate rotation, using centrifugal force to remove mist in addition, the separation efficiency can reach 98%-99%, and has the advantages of simple structure low pressure drop.
Corresponding treatment gas;
For all kinds of corrosive gas purification treatment has obvious effect, can effectively remove the hydrogen chloride gas (HCl), hydrogen fluoride (HF), ammonia (NH3), sulfuric acid mist (H2SO4), chromium acid (CrO3), hydrogen cyanide gas (HCN) and alkali (NaOH), hydrogen sulfide (H2S), Faure Marin (HCHO) and water soluble gas. Our company's independent research and development of high cleaning efficiency, simple operation and long service life. After treatment, the acid and alkali waste gas emissions meet the national emission standards.
The chromium containing waste gas
It is necessary to adopt the method of combination of filtration recovery pretreatment and wet spray treatment. The net recovery device can preliminary recovery of chromic acid mist in exhaust gas 60%-80% chromic acid, considering the discharge standards, the subsequent need to spray with absorption and purification. The highly toxic six valent chromium can be reduced to trivalent chromium with low toxicity:
H2CrO73Na2SO33H2SO4, Cr2 (SO4) 33NaSO44H2O
Nitrogen oxides (NOX)
Nitric acid solution has strong oxidation and instability, and its oxides are various. It is necessary to combine with the reducing agent to produce a stable N2.
2NOO2, 2NO2
2Na2S2O3NO22 NaOH, 2N2 = 4 Na2SO42H2O
Treatment of acid and alkali waste gas
Because of its excellent water solubility and easy to be absorbed by water, this kind of waste gas can be removed by absorption method. Acid gas by alkali absorption, alkaline gas by acid liquid absorption. For example: sulfuric acid waste gas can be used sodium hydroxide solution or ammonia neutralization treatment, ammonia containing waste water can be directly absorbed into ammonia. The reaction is as follows:
H2SO4 +2NaOH + Na2SO4 + 2 H2O
NH3+H2O, NH3, H2O
The treatment of cyanide containing waste gas
There are two methods: adding fog inhibitor or absorbing method. However, due to the use of fog inhibitor, may affect the water quality and the impact of subsequent processes lead to poor plating effect and not much use. Due to a variety of hydrogen cyanide can be absorbed, it is currently the most common approach is the use of wet gas containing cyanogen absorption. Cyanide exhaust available 1.5% sodium hydroxide and sodium hypochlorite solution absorption. The absorption liquid with sodium hypochlorite solution, using sodium hydroxide to adjust the absorption liquid PH in alkaline condition, the absorption by spray tower, the purification efficiency can reach above 90%, the process of generating products are carbon dioxide, nitrogen and sodium chloride. The reaction equation is as follows:
2NaClO + CN- + CO2 + N2 + 2NaCl
Equipment applicable scope;
Refinery, rubber factory, leather factory, printing factory, chemical factory, Chinese pharmaceutical factory, metal foundry, plastics recycling plant, spraying solvent, food processing plants, meat processing plants, slaughterhouses and poultry feed, paper mill, sewage treatment plants, garbage transfer stations and other organic and inorganic waste gas purification