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Application of regular packing in nitrogenous fertilizer plants.
作者:Steven 发布于:2011/5/13 14:17:42 点击量:

Nitrogen fertilizer industry and mass transfer and separation equipment has been the granular packing and tray tower dominates, in recent years, structured packing has been applied in small nitrogenous fertilizer plant.
The 1 main application types and characteristics
1.1 corrugated wire gauze packing

Corrugated plate made of metal mesh is pressed into the composition, wave height is small, large specific surface area, surface wetting properties, high separation efficiency, and separation efficiency can reach 10 pieces per meter packing layer or more theoretical plate. But because of its manufacturing stainless steel screen your price per unit volume of filler, high cost, and low intensity, atmospheric distillation and vacuum distillation, absorption is generally applicable to the difficult separation and heat sensitive material, the tower diameter is small (less than 2m), no blockage and corrosion. Divided into single and double corrugated wire gauze packing. Single layer corrugated wire gauze packing have type 250, type 500, type 700, the type 500 is the most widely used.

1.2 mesh (mesh) corrugated packing
Mesh corrugated packing is a new type corrugated packing the recent successful development, is directly to the stainless steel strip properly drawn into specific size diamond mesh, excellent performance and cost than screen significantly reduced with corrugated wire gauze packing, industrial application increasing, application scope is similar to that of corrugated wire gauze packing and special conditions.

1.3 metal corrugated plate packing
Much is made of stainless steel corrugated plate, the plate have holes drilled many about 5mm. The performance between metal mesh corrugated packing and packing. Due to the reasonable structure, high strength, low cost of metal mesh corrugated packing low, good corrosion resistance, strong anti pollution ability, low pressure, large flux, it is especially applicable to organic compounds in atmospheric distillation and moderate vacuum and pollution risk, and suitable for normal pressure and pressure counter current absorption process. In the design of the new tower and the transformation of the old tower, it is used in bulk packing to replace Bauer ring, and some of the plate tower. Especially in the large tower transformation, to improve the product yield and quality, reduce the energy consumption has obvious economic effect.

1.4 plastic corrugated plate packing
Structure and metal corrugated plate packing material are similar, polypropylene, PVDF, PVC etc.. The main advantages of corrosion resistance, light weight, low cost, small resistance, high efficiency, small amplification effect. There are 125 Y and 250 Y two specifications, they are suitable for all kinds of absorption and desorption process, also for purification of waste gas and liquid load and high operating pressure and improve the existing tower production capacity, but also suitable for easy to bubble system. Used in the fertilizer and environmental protection departments have achieved good results.

2 application examples and effects in recent years, the medium and small nitrogenous fertilizer plants in the technological transformation and expansion ability, application of regular packing achieved great success.

(source: http://www.goepe.com)

 

 

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