Structural characteristics and application of stainless steel strip bubble tray

Structural characteristics and application of stainless steel strip bubble trayIn mass transfer separation processes such as distillation, absorption, and distillation in industries such as petrochemicals, coal chemicals, and fine chemicals, the performance of the tower internals directly determines the separation efficiency, energy consumption level, and operational stability of the device. The stainless steel strip bubble cap tray produced by Kelong Petrochemical Equipment Packing Co., Ltd. in Pingxiang City, Jiangxi Province, is an upgraded and optimized product of the traditional circular bubble cap tray. In response to the pain points of high pressure drop, limited processing capacity, and complex installation of the circular bubble cap tray, structural innovation has been achievedThe multiple advantages of "high efficiency, energy saving, anti blockage, and convenience" have made it the preferred internal components for large towers and complex working conditions. It is widely used in various high load, easily blocked, and strongly corrosive mass transfer separation scenarios. With mature design and stable performance, it plays an irreplaceable role in industrial production.

1、 Structural principle

Structural characteristics and application of stainless steel strip bubble tray：The stainless steel strip bubble cap tray produced by Kelong Petrochemical Equipment Packing Co., Ltd. in Pingxiang City, Jiangxi Province is a bubble type plate tower internals, using two types of width and widthUThe integrated strip design of the groove combination consists of a riser, a strip bubble cover, a tray, a weir plate, and a downcomer, which work together to achieve efficient gas-liquid mass transfer.

Core structure: The wide groove forms the bottom plate and continuous riser, with a much higher opening rate than the circular bubble cover; The narrow groove serves as a bubble cover, with long tooth gaps on both sides to achieve uniform gas distribution. The ascending pipe is leak proof, the weir plate maintains the depth of the liquid layer and assists in the uniform distribution of the liquid, and the bow shaped descending pipe ensures smooth flow of the liquid.

Working principle: The liquid flows into the tray through the downcomer and overflows, while the gas is sprayed into the liquid layer through the riser and bubble cover teeth to form a bubbling layer. The gas-liquid is fully transferred and heat transferred to complete the process, achieving continuous production.

2、 Core technical features

1Efficient and stable mass transfer: Plate efficiency65%~85%Operational flexibility30%~120%Adapt to load fluctuation conditions;

2Strong processing capability: The processing capacity is increased compared to circular bubble caps15%~30%Adapt toDN800~DN12000Large diameter tower;

3Energy saving and consumption reducing: Single board pressure drop250~500Pa/Block, lower than round bubble cover20%~40%；

4Anti blocking and leak proof: The channel is wide, suitable for high viscosity and impurity containing media, and there is basically no leakage;

5Economic installation: modular design, easy installation and maintenance, lower cost compared to circular bubble covers15%~25%；

6Material adaptation: optional304The316LMade of stainless steel material, suitable for strong corrosion conditions.

3、 Applicable working conditions and application fields

Widely used in petrochemical industry (crude oil distillation, catalytic cracking, etc.), coal chemical industry (gas purification, methanol distillation, etc.), fine chemical industry (solvent recovery, organic acid refining, etc.), and environmental waste gas treatment (water washing absorption, desulfurization and denitrification, etc.), especially suitable for complex working conditions such as high viscosity and easy crystallization, it can directly replace traditional circular bubble cover trays for the renovation of old equipment.

4Comparison with traditional circular bubble cap tray

5、 Selection points and precautions

Selection points: The selection should be based on core parameters such as tower diameter, gas-liquid load, medium characteristics, and process requirements. The channel width should be selected first according to the cleanliness of the medium. For clean and particle free media, conventional strip channels can be used. For suspended solids and easily crystallizable media, the channel should be widened; Select materials based on the degree of corrosion, with strong corrosive media being preferred316L、2205Dual phase steel or titanium material; Determine the tray specifications based on load fluctuations and operational flexibility requirements, and prioritize the use of strip bubble cap trays for low load conditions with large fluctuations; The spacing between boards is adjusted according to the foaming properties of the medium, and media that are prone to foaming and clogging are selected450~600mmLarge board spacing, conventional medium selection300~400mmBoard spacing, specific parameters can refer to industry standardsHG/T 3188-2011Technical Regulations for Design of Chemical Towers.

Attention: During installation, it is necessary to ensure the levelness of the tray and ensure that the bottom edge of the bubble cover has sufficient immersion depth of clear liquid（15~30mm）To ensure uniform gas bubbling and no leakage; Drainage holes (tear holes) need to be opened on the tray, with a diameter of3~8mmTo facilitate the emptying of liquid on the tray during maintenance and avoid blockage of channels due to residual media; During operation, it is necessary to regularly check the gap between the bubble cap teeth, the ascending pipe, and the descending pipe, clean impurities in a timely manner, and prevent blockage from affecting mass transfer efficiency; For media that are prone to aggregation and crystallization, it is necessary to regularly clean the tray to extend the service life of the equipment; The installation area and ineffective area need to be planned reasonably to avoid occupying too much space inside the tower, which may affect the gas-liquid flow and mass transfer efficiency.

6、 Technological development trends

The future will be achieved throughCFDNumerical simulation optimizes the flow channel structure, develops durable stainless steel materials, achieves intelligent adaptation and standardized production, further reduces costs, improves efficiency, and expands its application in complex working conditions and the renovation of old equipment.