How to deal with chemical plant odor purification, industrial deodorization process has what

Femtosecond detection found that industrial deodorization of the three approaches

Deodorization approach

Smoke deodorization technology so far based on the deodorization process, whether to add water and deodorization of the dry, wet method of smoke deodorization is divided into: wet, semi-dry, dry deodorization technology. Wet deodorization technology is relatively mature, high rate, simple operation. Traditional limestone/lime - gypsum flue gas deodorization process using calcium-based deodorant drawing on the generation of sulfur dioxide calcium sulfite, calcium sulfate, because of its solubility is small, it is very easy to deodorant towers and pipelines to form a scale, blocking the phenomenon. Double alkaline or flue gas deodorization technology is to overcome the lack of limestone - easy to scale and R & D approach.

Deodorization after combustion phenomenon, also called deodorization flue gas deodorization, deodorization, deodorization technology, based on the type of deodorant, can be divided into the following five forms: calcium carbonate (limestone) calcium-based, based on the magnesium of MgO, sodium mud-based approach, the basis of the ammonia method, NH3 based on the organic alkali organic alkali. The economic activation of the technology widely used under the sky is the method of calcium, and the proportion is more than 90%.

Wet deodorization technology is the use of solutions containing or slurry water conditions wet deodorant lending agent deodorant disposal, the method of deodorant reaction speed, simple facilities, deodorization rate is high, but there is a wide range of serious corrosion, operation and protection of the high cost, easy to lead to secondary pollution, and so on.

Dry deodorization technology of deodorization draws on and product processing implementation of dry conditions, the law does not have waste acid emissions of sewage, facility corrosion, from a smaller extent without significant cooling purification process, purified flue gas high temperature smoke, help in the flue gas contouring, derogation of the secondary pollution, but the deodorization rate is lower, the reaction rate is slow, a large number of facilities, and so on.

Semi-dry deodorization technology refers to the deodorant deodorant in dry conditions become dry, moist conditions (such as water washing activated carbon regeneration process), or moist conditions deodorant deodorization, deodorization in dry conditions, such as spray drying method of flue gas deodorization technology. Especially in the wet deodorization conditions, disposal of semi-dry deodorization in dry conditions, with wet deodorization reaction speed, deodorization rate of high advantages, and no waste acid emissions of sewage, dry deodorization of the product is easy to dispose of the strengths of the many people are widely concerned about the attention. According to the goal of deodorization, it can be divided into two kinds, yielding and lending back method.

Secondly, the field of application and the items of attention

Wet flue gas deodorization (FGD) environmental protection technology because of its high deodorization rate, charcoal quality, widely suitable for the use of the technology is mature and stable operation cycle is long, small load changes, flue gas disposal experience of the unique place, is widely used in large and medium-sized thermal power plants, into the main flue gas deodorization technology in and out of the country. Thermal power plants. However, the process also has a strong corrosion medium, high smoke air temperature, SO2 lends a large content of liquid solids, abrasion resistance, facility corrosion field, the need for high-quality technology and corrosion failure of the hard protection of high-quality construction, and so on. Because of this, the facility corrosion control has been one of the key issues affecting the safe operation of the facility in a long period of time.