Heat of industrial off-gas treatment destroys processing technology to analyse

Heat is destroyed is the method of industrial off-gas treatment that uses extensively at present, have machinist job waste gas to low density especially, the heat of organic industry waste gas is destroyed can divide for direct blaze burning and catalytic combustion. Direct blaze burning is organic industry waste gas direct in air current combustion and auxiliary fuel flaming a kind of method. Below most circumstance, the density of organic matter is very low, can burn below the circumstance that did not assist fuel. Below proper temperature and retention period, direct blaze burning can achieve the heat treatment efficiency of 99% .

Catalytic combustion is to be in after organic industry waste gas heating in air current, organic matter chemistry is quickened to react below the action of catalytic bed (or destroy efficiency) a kind of method. The existence of activator makes organic matter destroys the fewerer than need of direct combustion law retention period in the process and lower temperature in heat. Activator is having main effect in catalytic combustion system.

The activator that is used at machinist job waste gas is purified basically is metal and metallic salt, the metal includes precious metal and the metallic activator that are not precious metal to be used at present basically is platinum and palladium. The technology is mature, catalytic active is tall. However, the value is relative taller. When the haloid and organic substance that contains the element such as nitrogen, sulfur, phosphor in processing, organic matter oxidizes easily and break vivid activator. Metalloid activator includes to transfer a group of things with common features elemental cobalt, rare earth. In recent years, be opposite domestic and internationally the development of activator is increasing, and more and more center at be not noble metal catalyst, in the sources of energy extraction respect obtained a lot of positive result. For example, v2O5+MOX(M: ? The activator that precious metal of?+ of  hill fish hawk makes is used at handling waste gas of armour sulfur pure industry, platinic + palladium + cupreous activator is used at processing to contain nitrogen waste gas of organic pure industry.

Because machine industry appears often of the impurity in waste gas, cause activator very easily toxic. Cause the poison with toxic activator (depressor basically includes arsenic of phosphor, lead, bismuth, stannum, mercuric, ferrous ion zinc, haloid etc. Managing activator arrives since activator carrier, increase activator valid area, activation agent has particular machine intensity, reduce the agglomeration, effect that increases catalytic active and stability. Basically can include alumina, vanadium iron, asbestine, argil, activated carbon, metal to wait with the material that makes carrier. Carrier of the most commonly used pottery and porcelain is made normally reticulate, globose, columnar with peak nest shape. In addition, zeolite of the silky luster of mercerized cotton fabrics had gotten more and more successes study in recent years.