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Dier Chemical Packing Co., Ltd., Pingxiang City, Jiangxi Province
Shield type and louver type liquid collectors
NegotiableUpdate on 05/06
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Overview
When the liquid flows from top to bottom in a packed tower, it is inevitable to produce a "wall flow" effect - that is, the liquid gradually converges towards the tower wall. This will cause the central area of the $r $n $r $n packing to dry up, resulting in a sharp decrease in the effective contact area between gas and liquid. The radial concentration difference formed in the cross-section of the $r $n $r $n tower severely weakens the mass transfer efficiency. Under long-term operation, the separation effect continues to deteriorate and cannot meet the design specifications. $r $n $r $n Therefore, it is necessary to set up a liquid collection redistributor after a certain packing height (usually 3-6 meters), and its core mission is
Product Details
Shield type and louver type liquid collectors
1、 Core products and parameters
Our company's (Deere Chemical Packing) tower internals workshop specializes in producing various high-performance liquid collectors. For the model you are interested in, the specific parameters are as follows:
| Product Name | Main model specifications | core material | Structural Features and Application Overview |
|---|---|---|---|
| Shield type liquid collector | DN1000, DN2000 | Stainless steel S30408 | Adopting a shield plate diversion structure,The gas channel has a large area and extremely low pressure drop (usually<2.5mm liquid column)Yes, it isVacuum distillation towerIdeal choice for pressure drop sensitive working conditions. |
| Louver type liquid collector | DN1000, DN2000 | Stainless steel S30408 | Guide liquid through inclined louvers while allowing gas to pass smoothly.High liquid collection efficiency and good gas-liquid separation effectOften used in conjunction with redistributors. |
2、 Why do we need a liquid collection and distributor?
In a packed tower, when liquid flows from top to bottom, it is inevitable to produceWall flow effectThe liquid gradually converges towards the tower wall. This will lead to:
The central area of the filling material has dried upThe effective contact area between gas and liquid sharply decreases.
Formation of tower cross-sectionRadial concentration differenceSevere weakening of mass transfer efficiency.
Under long-term operation, the separation effect continues to deteriorate and cannot meet the design specifications.
Therefore, it is necessary to set up a liquid collection redistributor after a certain packing height (usually 3-6 meters), and its core mission is to:
collectAll the liquid flowing down from the upper packing layer (including wall flow).
thoroughly mixedEliminate radial concentration differences.
Re distribute evenlyLiquid to the surface of the lower packing layer.
Uniform guidance of rising gasAnd the resistance is small.
3、 Product Features and Selection Comparison
| Product Type | core advantage | Typical application scenarios |
|---|---|---|
| Shield type liquid collector | Ultra low resistanceHas the least impact on gas phase flow rate. | Vacuum distillation towerA process with high steam load devices and strict limitations on system pressure drop. |
| Louver type liquid collector | Good gas-liquid separation effect, high collection efficiency, and sturdy structure. | Often withTray type liquid redistributororTubular redistributorCombined, it forms an efficient "collection mixing redistribution" system, suitable for most atmospheric and pressurized distillation and absorption towers. |
|
Other types (Split type/Support type/Riser tube type) |
Meet the special needs of different installations, supports, and gas-liquid circulation. | Customized selection based on the space inside the tower, installation conditions, and specific process requirements. |
4、 Professional advice and system solutions
Regarding what you mentionedSegmented 6-meter-high filling layerRequirement, a single collector is not sufficient to ensure effectiveness. We recommend usingCombination module of "liquid collector+redistributor"：
Recommended combinations：
Loubet type liquid collector+trough plate type liquid redistributorThis is currently a large and medium-sized packed towerPreferred standard configurationThe trough plate distributor has the functions of collection, mixing, and distribution. The gas passes through the riser, and the liquid flows out uniformly through the distribution holes after being mixed in the chassis. Its performance is extremely reliable.
Add at the top of the riserblockIt can effectively prevent liquid from directly leaking in.
Design and Manufacturing Support：
Our company has mature experience in tower internals design and precision manufacturing workshops, which can ensureDN1000、DN2000The dimensional accuracy and structural strength of large-scale products.
Stainless steel S30408 materialEnsured corrosion resistance and long lifespan under most chemical operating conditions.
In summary, choosing an efficient liquid collection and redistribution system is the key to fully utilizing the packing performance and ensuring the long-term stable and efficient operation of the tower.It is not an auxiliary component, but one of the core components that determines separation efficiency.
Shield type and louver type liquid collectorsWe can provide you with internal component combination design and manufacturing services based on your specific process (such as material system, pressure, load, etc.) and tower size.
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