Good Quality High Capacity Desulfurization Gypsum Dryer

Desulfurizationgypsum dryer

1.Productintroduction：

Withthe increase of environmental protection consciousness, our country to thepower plant coal gas in the sulfur dioxide emissions control is getting moreand tighter, power plant desulfurization is imperative. At present, thetreatment process and equipment of FGD gypsum are not the same as the naturalgypsum, such as in the material conveying, dust treatment, combustion process,etc. On physical desulfurization gypsum and natural gypsum also has thedifference, such as high desulfurization gypsum purity, free water, fineparticle size; particle size uniform particle size distribution, poorgradation, standard thick by a large amount of water, the water soluble saltmore. It is also worth noting is different from the source of gypsum andnatural gypsum, FGD gypsum to unreacted calcium carbonate as main impuritiesand is not complete oxidation of sulfite calcium exist, impurity statedifference, and the other in the production process of desulfurizationtechnology for the treatment of different limestone composition of rawmaterials, processing of the fineness of limestone different will affect thedesulfurization gypsum quality.

2.Technological superiority:

Themain application of the desulfurization gypsum is the use of it as a cementretarder; or half water gypsum is used in the manufacture of gypsum board. Thetwo kinds of direct method and indirect method can be divided into differenttypes of building gypsum.

1.Indirect method (two steps of drying calcination)

Thedrying, and claiming two-step method is according to the requirements of thepower plant's energy and environmental protection, it will be much easier toprolapse of free water and difficult to prolapse of crystal water set in thetwo sets of equipment to make it more reasonable, but also facilitate theadjustment of product structure and quality control. The device can produce drytwo water gypsum (cement retarder used), super fine plaster.

2.Direct method (one step method for drying calcination)

Onestep method of drying and calcination is a set of gypsum and acclaimed processequipment for the research and development of the three - story roller dryingequipment with high efficiency of heat and mass transfer. The process devicecan produce dry two water gypsum (cement retarder used), also can produce semiwater gypsum, production of dry two water gypsum of the wind temperature just120 can use the thermal power plant of low temperature flue gas.

3.Prospects for development:

Desulfurizationgypsum in building materials industry is widely used, through different meansto deal with, basically can replace most of the use of natural gypsumproduction of building materials products. The integrated treatment andapplication of domestic desulfurization gypsum has started, the utilizationprospect of contains a huge market opportunity, especially the lack of thenatural gypsum and gypsum resources rich in economically developed areas andthe practical application prove desulfurization gypsum is a valuable resourcefor high grade. It can be applicable to different uses of gypsum buildingmaterials production, processing after the desulfurization gypsum is a evenbetter than the natural gypsum cementations materials. Desulfurization gypsumafter drying and dehydration treatment become plaster and plaster of Paris bythe products can be divided into: casting gypsum, gypsum plaster, ceramicindustrial gypsum, plaster casting industry, the tooth material with gypsum andorthopedic medical bandage gypsum, coal mine fire prevention to strengthentunnel wall plaster, soil improvement Liang with plaster, and so on, thelargest amount of is building plaster (plaster of Paris).