Benzene packing

According to our company (Pingxiang Cologne) engaged in the design, production and sales of chemical packing and tower internals for more than ten years, the earliest benzene washing tower in the coking and gas industry in China was the longest and most commonly used wooden lattice packing. Compared with other towers, it has the characteristics of low resistance, long life, and strong adaptability. However, it is bulky, bulky, occupies lots of land, and has high investment. To this end, China's relevant technical personnel developed a dedicated benzene washing packing - plastic plum rosewood packing / wash garland garnet packing / wash column stainless steel plate corrugated packing, its large surface area, high porosity, low resistance, large processing capacity Due to its curved surface structure, multiple contact points, good liquid distribution, good wetting rate, high efficiency; made of synthetic resin, good chemical stability and mechanical properties, light structure, easy loading and removal; smooth surface, not easy Adhesive debris, if any attachments are also easy to remove, based on the above characteristics, plastic plum rosette packing / washing garland gargle / wash PTFE stainless steel plate corrugated packing is more and more customers choose.

Because there are few studies on the mass transfer performance of the garland fillers, no corresponding mathematic model has been established. Only Tianjin University Li Xiyuan et al. studied the fluid mechanics and mass transfer performance of Japanese garland fillers. However, the experiment was conducted only under the air-water-ammonia system, and no corresponding correlation was proposed for the calculation of the mass transfer coefficient. In this regard, we calculated the mass transfer formulae of Raschig ring and Pall ring packing in the design calculations of plastic garland garland/washed garland packing/stainless steel plate corrugated packing. The reason is: It is based on organic medium or water in the absorption or desorption operation, the fillers used are: arc saddle-shaped Raschig ring packing and Pall ring spherical packing. It is suitable for the operating environment of washing benzene tower.

Therefore, in the industry of chemical coking plant fillers, commonly used benzol packing is stainless steel corrugated structured packing/304-hole corrugated packing/washing benzene garland packing/Taylor garland packing/plastic PP garland packing

Plastic garland characteristic parameters (PP garland, PE garland, PVC Taylor garland, CPVC Taylor garland, PVDF garland), etc.

Type Outer Diameter mm High mm No. of Packed No/m3 Porosity % Specific Surface Area m2/m3
Dg25 25 9 170000 82 195 2000

Dg47 47 19 32500 88 185 1500

Dg51 51 19 25000 89 180 1320

Dg59 59 19 17500 92 150 1200

Dg73 73 27.5 8000 89 127 1100

Dg95 95 37 3900 90 94 980

Stainless steel corrugated structured packing is special filler for gas coking benzene tower desulfurization tower. The coal gas urea desulfurization tower adopts 125Y stainless steel orifice corrugated packing, purification process stripping tower adopts 250Y, and coking plant wash tower uses 125Y. 250Y 304 stainless steel orifice corrugated packing; 250Y stainless steel 304 regular corrugated packing used in ammonia recovery tower of nitro compound fertilizer project, etc.

Orifice corrugated packing technical indicators: (304 corrugated packing / 316L corrugated packing / non-metallic structured packing / Hastelloy structured packing)

Model Peak height mm Surface area m2/m3 Theoretical plate number I/m Voidage % Pressure drop Mpa/m F factor M/s (kg/m3) 0.5

Sm125Y 24 125 1-1.2 98.5 1.5×10-4 3

Sm250Y 12 250 2-3 97 1.5-2×10-4 2.6

Sm350Y 8 350 3.5-4 95 1.5×10-4 2

Sm450Y 6.5 450 4-4.5 93 1.8×10-4 1.5

The physical maps below are the materials and selections of the special benzene packings for the company - plastic garland fillers / Taylor garland fillers / garnet garland fillers / stainless steel orifice corrugated packings / stainless steel corrugated structured packings: