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Product Details:
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| Material: | Stainless Steel, Or As Per Order | Position: | On Top Of Packing |
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| Type: | 2 Stage Trough Type | Advantage: | Uniform Distribution |
| OEM: | Yes | Application: | Liquid Distributing |
| High Light: | gravity distillation column internals,liquid distributor distillation column internals,liquid distributor packed column |
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Custom design packing column gravity trough type liquid distributor
1. Trough type liquid distributor structure:
Orifice trough type distributors consist of parallel troughs with perforated holes in the bottom for liquid flow. Vapor rises in the space between the troughs. The troughs are often interconnected by cross channels (called as parting box), which help equalize the liquid level in different troughs. This trough type liquid distributors provide more open area for vapor flow and is easier to support.
Orifice type distributor can be designed to have a large number of drip points to provide superior liquid distribution, though it may suffer from corrosion and plugging. Orifices are sized to maintain a minimum liquid head at desired turndown conditions & to avoid distributor overflow during turn up condition. Very small orifice diameters (<4mm) are avoided to prevent fouling.
2. Some Liquid Distributor Type:
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Column Diameter mm |
Specific liquid load M3/m2*h |
System fouling tendency | Turndown ratio | Suitable type of liquid distributor |
| 250 - 900 | 0.75 - 5 | Low - medium | ＜10:1 |
Trough type liquid distributor with sump Deck type liquid distributor with orifices on drip tubes |
| 5 - 30 | Low - medium | 2:1 |
Pan type liquid distributor Trough type liquid distributor with sump |
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| ＞30 | Low - medium | 2:1 |
Pan type liquid distributor Trough type liquid distributor with sump Deck type liquid distributor |
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| ＞900 | 0.75 - 5 | Low - medium | ＜10:1 |
Trough type liquid distributor with parting box Deck type liquid distributor with orifices on drip tubes |
| 5 - 30 | Low - medium | 2:1 |
Trough type liquid distributor with sump Trough type liquid distributor with parting box Deck type liquid distributor |
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| ＞30 | Low - medium | 2:1 |
Deck type liquid distributor Trough type liquid distributor with sump |
3. Trough Type Liquid distributor position in packed tower:
4. Two-stage trough type liquid distributor
The two-stage trough type liquid distributor consists of a main trough (primary trough) and a sub trough (secondary trough), and the main trough is placed above the sub trough. The reflux liquid or the feeding liquid enter the main tank through the feeding pipe above the main trough, and then the main trough distributes it to the sub trough in proportion. The structural dimensions of the main trough and the sub trough are determined by the liquid flow rate, the tower diameter and the requirements for the distribution quality. The structure of the two-stage trough liquid distributor is simple, and it is easy to enter the tower from the manhole for assembly. This kind of structure is commonly used in the tower where people can enter for installation, and the tower diameter is more than 800mm.
The main trough is an open structure with rectangular section, its length depends on the tower diameter and the size of the trough, and its height depends on the operating flexibility, usually 200-300 mm. Its function is to distribute the liquid stably and evenly to the sub troughs below. Therefore, the bottom or side wall of the main trough shall be equipped with a liquid distribution device, the main trough shall receive the liquid from the feed pipe, shall be equipped with a flow stabilizing device, and the trough body shall be equipped with a positioning and fixing device. The velocity of liquid in the main trough shall not exceed 0.4m/s, otherwise it will cause a large liquid level drop and reduce the liquid distribution quality.
The function of the sub trough is to evenly distribute the liquid from the main trough to the surface of the packing, so the sub trough is very important to the liquid distribution. Its length is determined by the tower diameter and arrangement. Its width is slightly different due to the liquid flow rate and the required residence time, generally 30-60mm. Its height is related to the operating flexibility, generally 250-300mm.
5. Trough type liquid distributor production
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