【Daily Question】June 5: What is the difference between sieve plates and bubble trays?
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This post was last edited by springpang on 2015-6-6 09:10. The Mechanical Section has introduced the \"Question of the Day\" feature, which not only helps to foster an active atmosphere for technical discussions and guide the direction of such exchanges but also provides users with financial rewards, enabling them to experience various cool features. Topic: Differences between sieve trays and bubble trays. The diameter of the bubbles is usually 80–150 mm (increasing as the tower diameter increases), and they are arranged in an equilateral triangle pattern on the tray, with the center distance being 1.25–1.5 times the diameter of the bubbles. The sieve pores are arranged in an equilateral triangle pattern on the tray; their diameter is generally between 3 and 8 mm, with 4–5 mm being the most common value. For handling media containing suspended particles and contaminants, larger sieve pores are used, with the tray pore diameter typically exceeding 10 mm. The ratio of hole center distance to hole diameter is usually in the range of 2.5 to 4.0. An overflow weir is provided on the tray to maintain a certain liquid layer depth on it, and the thickness of the sieve tray is approximately 0.4 to 0.8 times the pore diameter. The difference between a sieve plate and a bubble cap plate is that (the bubbles and lift pipes are removed), and many small-diameter circular holes arranged in an orderly pattern are made directly on the plate, which are known as sieve pores. The sieve tray tower has a simple structure and low cost. Its production capacity is 10% to 15% higher than that of a bubble column, its tray efficiency is also about 10% to 15% higher, while the pressure drop per tray layer is approximately 30% lower. However, its operating range is narrower than that of a bubble column, with an operating flexibility of only 2–3, and the perforated sieve plates are prone to clogging. Requirements and tips for answering: (You can summarize based on your own usage experience.) Please note: We will close this thread after 24 hours, and at that time we will announce the best reply (the most helpful one), along with the answer and explanation. Charisma Reward: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points related to this question, please reply to this post to inform us, and we will have a moderator award you charisma points. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights. After registration, we will rank participants based on the content of their posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score earning +5 charm. Other content: Recruitment for moderators, promotions for sections or regions (must be included), solicitation of topics, etc. 【Mechanical Zone】Call for a Comprehensive Collection of Essential Knowledge【Seeking Manufacturer Sponsorship】(Ongoing campaign)【Rewards for Recommending Essential Content】
Strainer plate towers do not have a liquid seal, while bubble cap towers do.
The difference between a sieve plate and a bubble cap plate is that (the bubbles and lift pipes are removed), and many small-diameter holes—sieve holes—are directly made in the plate. During operation, the gas rises at high speed through the small holes, while the liquid flows to the next layer of plates via the downcomer. The gas dispersed into bubbles turns the liquid layer on the plate into a highly turbulent foam layer. Under the same conditions, the production capacity of a sieve plate tower is 10%–15% higher than that of a bubble column; the plate efficiency is also about 10%–15% higher. Meanwhile, the pressure drop per plate is approximately 30% lower, making it suitable for vacuum distillation ； The tray efficiency is high, but slightly lower than that of a floating valve tower. It has high operational flexibility, but slightly less than that of a bubble column. Its drawback is that the small-pore sieve plates are prone to clogging, making them unsuitable for handling dirty, viscous fluids containing solid particles.
The difference between a sieve plate and a bubble cap plate is that the bubbles and lift pipes are removed!
The difference between a sieve plate and a bubble cap plate is that the bubbles and lift pipes are removed, and instead many small-diameter holes – sieve pores – are made directly in the plate. During operation, the gas rises at high speed through the small holes, while the liquid flows to the next layer of plates via the downcomer. The gas dispersed into bubbles turns the liquid layer on the plate into a highly turbulent foam layer. Screen plates are usually made of stainless steel or alloy steel, with carbon steel being used less frequently. The diameter of the holes is approximately 3–8 mm. A thickness of 4–5 mm is commonly used, with the plate thickness being approximately 0.4–0.8 times that of the hole. In addition, there is another type of large-pore plate with a pore size of over 10 mm, used in situations with suspended particles and dirt. The sieve tray tower has a simple structure and low cost. Its production capacity is 10% to 15% higher than that of a bubble column; the tray efficiency is also about 10% to 15% higher, while the pressure drop per tray is approximately 30% lower. However, its operating range is narrower than that of a bubble column, with an operating flexibility of only 2–3
Structurally: the sieve plate has many small holes of very low diameter directly made in the tray, whereas the bubble cap plate has holes of larger diameter along with bubbles. Efficiency: Sieve plates are superior to bubble trays. Processing capacity: Sieve plates are superior to bubble trays. Operational flexibility: Bubble trays are superior to sieve plates