The structure of the bubble cap tray is mainly composed of a blister (gas-liquid contact element), a gas riser, an overflow weir, a downcomer and a tray.The bubble tray is provided with a plurality of round holes on the tray plate, and each hole is welded with a short tube called a riser tube, and the tube is covered with a “hat” called a blister, and a plurality of strips are formed around the blister. Hole, during operation, the liquid flows from the upper tray through the downcomer into the lower tray, then flows laterally through the tray plate and flows into the next tray; the gas rises from the lower tray into the riser tube and passes through the annular passage. The strip holes of the blister flow into the liquid layer between the blister.
Metal Raschig ring is the oldest regular packing and is still used today for many applications in mass transfer applications but commonly for refilling existing columns.Friedrich Raschig invented the rings in the 1880s but did not patent them until the 1910s. Due to simple cylindrical shaped tube with an aspect ratio of 1:1, liquid liquid will move in the thousands of channels formed by the rings, coating the inside and outside surfaces, and eventually flowing to the bottom. Gas entering at the bottom will flow through the same paths formed by the rings, and will have time to contact and react with the liquid.However, Owing to metal Raschig ring’s inside is a cylinder with open ends, it is difficult to follow into Metal Raschig Ring’s inside for liquid. Finally, its mass transfer efficiency is lower than others. It has replaced by Metal Pall ring slowly.
Copper Pall ringBy minimizing the number of contours and crevices that can cause liquid hold-up and potential entrainment, the Metal Pall Ring geometry enables high gas and liquid transfer rates. The opened cylinder walls and inward bent protrusions allow greater capacity and lower pressure drop than standard cylindrical rings. This open ring design also maintains an even distribution and resists wall-channeling tendencies. The interior and exterior contacting surfaces of the pall ring provide for an effective distribution of liquids and gasses and resist plugging, fouling and nesting.
Metal Intalox Saddle ring is was invented by American Norton in 1978, , which is a new type random packing.In Domestic market, it also called Intalox Metal saddle ring. In the 70s ending, we also invented two similar products. One is Metal rectangular saddle ring. Other is Metal Double arc ring.Metal Intalox Saddle ring is not only has ring packing’s circle, opening hole and inward tongue,but also has Rectangular saddle ring’s Arc channel. In addition, its two side’s turnup and two ends bottom’s tooth structure will increase gas & liquid contacting frequency. Finally, Metal Intalox Saddle ring will promote liquid’s surface distribution and update.
When liquid flows downward packing’s surface to become liquid droplet,these droplet fall down the next packing’s surface to form interflow.After that, when liquid droplet contacts with the rising gas, material was be transferred.Gas & liquid’s contacting basically principle is collision type surface’s continuously update.Metal cascade mini ring’s two end’s round turnup and large wall’s area will promote liquid’s continuously interflow and shunt to achieve surface’s update. Therefore, it can be regarded as one high gas-liquid contacting efficiency metal random packing.
The outstanding structure feature is to change tooth type edge instead of Arc type edge. This change increases packings contacting gap and promotes air-liquid’s flow and dispersion. Owing to Ceramics have excellent acid and high temperature resistance characteristic, it is very suitable in High temperature and corrosive environment.Ceramic intalox saddles relate to irregular acid-resistant packing. The surface of the Intalox saddle is part of the torus. Compared to Raschig rings, Intalox saddles with the same size of packed bodies have a 25% larger specific surface area and a slightly larger free volume. Saddle-backed packing has less hydraulic resistance and greater efficiency, than the Raschig rings.Moreover,as ceramics are very brittle, it is very easy to broken in a long distance transportation. It is mainly used in petrochemical and RTO field, especially in the drying tower and absorption tower for sulfuric acid production.
Compared with Ceramic Berl Ring, it changes the both arched surface to rectangulor surface.This change increases packings contacting gap and promotes air-liquid’s flow and dispersion. Owing to Ceramics have excellent acid and high temperature resistance characteristic, it is very suitable in High temperature and corrosive environment. In addition,as ceramics are very brittle, it is very easy to broken in a long distance transportation. It is mainly used in petrochemical and RTO field, especially in the drying tower and absorption tower for sulfuric acid production.
Rachig ring’s birth has indicated a big breakthrough of Tower packing. Due to simply structure & cheap cost, it is very popular in the early of 19th century. However, in the actual application, we often found that Rashig ring’s inside surface has not been fully wet by liquid.This phenomenon will cause liquid’s wall flow,Channel flow and other problems. Finally, it was be eliminated slowly.However, as the earliest Tower packing, it also meet low requirement tower design. Furthermore, it also can regard as calculated basis for Tower Height’s design.
It is is a device often fitted to vapor liquid separator vessels to enhance the removal of liquid droplets entrained in a vapor stream.It is made out of aluminum, galvanized steel and stainless steel materials. When desulfurized flue gas passing through Metal Mist Eliminator at a certain speed, flue gas will be quickly change movement way. Due to the inertia and centrifugal’s driven, droplet collides with Vane and gather to form water flow. Finally, when droplet forms bigger ones,It will fall down. The most common process design for Mist eliminator is in a vertical gas flow, but it is also possible to install Mist Eliminator in the horizontal gas flow. The choice of vanes and design is influenced by the system pressure loss, the cleanability of the mist eliminator and the risk off clogging.The mist eliminator system consists of the mist eliminator body and a flushing system. Generally, it is composed of two-level demister body with different specifications, flushing water pipes, nozzles, supporting frames, supporting beams and related connections, fixing parts, and sealing parts.