Stainless steel blisters implementation standard JB/T 1212-1999

Stainless steel bubble cap is one of the main components of bubble tray, usually made of stainless steel material. Its main function is to provide a gas-liquid interface to promote heat and mass transfer between gas and liquid. In industrial production, stainless steel bubble tray is widely used in chemical, petrochemical, pharmaceutical, environmental protection and other fields, for distillation, absorption, extraction and other unit operations

Complex structure: The bubble cap usually consists of a gas riser and the bubble cap itself. The gas riser connects the column plate and the bubble cap. There are many small holes or gaps in the bubble cap for the passage of gas and the dispersion of liquid. Flexible operation: bubble tray can maintain stable operation performance in a large range of gas-liquid flow to adapt to different production requirements. Not easy to plug: bubble cap design can reduce solid particles and impurities blocking, to ensure the normal operation of the tray. High efficiency: bubble tray provides a large gas-liquid contact area, which is conducive to heat transfer and mass transfer process and improves separation efficiency.


The width and depth of the slots also affect the bubble size and the velocity of the gas. Increasing the width and depth of the slot properly can make the bubbles bigger, but it may reduce the dispersion of bubbles; conversely, decreasing the width and depth of the slot will make the bubbles smaller, but it may increase the resistance of gas passage. Therefore, it is necessary to optimize the shape and size of the slot according to the specific process requirements and operating conditions to obtain the best gas-liquid contact effect and operating performance.

  Height and diameter of riser pipe: The height of riser pipe determines the distance between the bottom of bubble cap and tray, which in turn affects the liquid sealing effect and gas flow path. Higher risers provide a better liquid seal to prevent liquid leakage to the next tray, but increase gas flow resistance, resulting in increased tray pressure drop. The diameter of the riser directly affects the gas flux. Larger riser diameter can allow more gas to pass through, reduce gas flow rate, reduce gas entrainment of liquid, but will occupy more tray area, reduce tray utilization; smaller riser diameter will increase gas flow rate, improve gas kinetic energy, conducive to bubble dispersion, but may lead to gas entrainment of liquid phenomenon intensified, affecting the separation effect of the tray. Therefore, it is necessary to consider the height and diameter of the riser tube in order to optimize the operation performance of the bubble tray.

Open porosity and pore size: The open porosity and pore size on the blister directly affect the gas throughput and bubble size. Larger open porosity and pore size can allow more gas to pass through, improve gas flux, and thus increase the processing capacity of bubble tray, but may lead to larger bubbles, shorter gas-liquid contact time, and slightly lower mass transfer efficiency. Smaller open porosity and pore size will limit gas flow rate and reduce the processing capacity of bubble tray, but it can form smaller bubbles, make gas-liquid contact more complete and mass transfer efficiency higher. Therefore, when designing bubble caps, it is necessary to select open porosity and pore diameter reasonably according to specific process requirements and operating conditions to balance the relationship between treatment capacity and mass transfer efficiency.

Slot shape and size: Slot shape (such as triangle, rectangle, trapezoid, etc.) and size have important influence on bubble dispersion effect and gas-liquid contact mode. Different shapes of slots produce different bubble shapes and trajectories. For example, triangular slots can disperse gas into finer bubbles, and bubbles are more easily mixed with liquid in the process of rising, improving mass transfer efficiency.