CN2537446Y

CN2537446Y - High efficiency guide sieve plate tower

Info

Publication number: CN2537446Y
Application number: CN 01220319
Authority: CN
Inventors: 李群生
Original assignee: Beijing University of Chemical Technology
Current assignee: Beijing University of Chemical Technology
Priority date: 2001-04-27
Filing date: 2001-04-27
Publication date: 2003-02-26
Anticipated expiration: 2011-04-27

Abstract

The utility model discloses a Linde sieve tray with high efficiency, relating to the gas-liquid mass transfer equipment in the chemical engineering and other industrial fields, which mainly comprises mass transfer unit formed by a downcomer, a column, a liquid accepting disk, and screen holes positioned on the column, guide holes and a bubbling promoter. The ejective gas horizontally drives the materials to go forward, and the bubbling is guided by the bubbling promoter. The utility model has the advantages of being applicable for the gas-liquid mass transfer and heat transfer devices in chemical engineering and other industrial fields, reducing or eliminating the gradient of liquid level and the back mixing of liquid inside the tray, promoting the even and stable flowing of the materials on the column, raising and promoting the gas bubbling, and improving the productivity and separation efficiency of heat transfer and mass transfer devices. The column of the utility model has the advantages of simple structure, low cost, convenient assembly and disassembly, and the achieving of higher technical target in separating process.

Description

High-efficiency guide sieve-plate tower

The utility model belongs to gas-liquid mass transfer, the heat-transfer equipment in the industrial circles such as Chemical Engineering, is a kind of high-efficiency guide sieve-plate tower concretely.

When plate column is used for mass transport process because material needs from the upstream flow further downstream, a liquid level drop is so just arranged on column plate, and if material viscosity big more, liquid flowing route is long more, the liquid level drop is just big more.The existence of liquid level drop, cause upstream material liquid layer abundant and downstream material liquid layer is thinner, be difficult to pass column plate at the upstream uprising gas like this and cause liquid bubbling on the column plate, blow open at the liquid layer that descends the conference of faint breath speed mistake to approach excessively, gas-liquid can not evenly flow on column plate, plate efficiency and production capacity have been reduced, show that also liquid is very fast in intermediate flow on the column plate, and the both sides of circular column plate, liquid flow is slower, even backmixing of liquid phase appears, reduce plate efficiency.At the upstream region of liquid stream, because liquid layer the process that flows down from downspout, has discharged contained gas, therefore the liquid that has just entered upstream region is tangible liquid, be difficult to cause bubbling, and gas-liquid is carried out mass transfer at bubble surface, its plate efficiency is just lower like this.When gradient of liquid level is bigger, when liquid reaches on the column plate of upper strata downflow weir in downspout greatly, liquid flooding will appear, this moment, the liquid stream of upper strata column plate did not get off, the liquid of every layer of column plate all can flow on the whole tower, and the operation of the tower state that paralyses needs to stop and handles.

The utility model purpose is to provide a kind of novel high-efficiency guide sieve plate (Fig. 1, Fig. 2, Fig. 3), can realize that in this tower gas and liquid are uniform and stable flowing, separative efficiency and production capacity are increased substantially, prevent effectively simultaneously that stifled tower and liquid flooding from taking place, and tower plate structure is simple, easy accessibility, cheap.

The utility model is to have offered sieve aperture on column plate, is provided with pilot hole and bubbling promoters in addition.

The utility model embodiment description of drawings is as follows:

Fig. 1 is the linde sieve tray operation principle.

1-seal pot 2-downspout 3-pilot hole 4-column plate 5-bubbling promoters 6-tower body

7,8-liquid flow path direction 9,10-uprising gas

Fig. 2 is a bubbling promoters structure.

Fig. 3 is the pilot hole structure

The 11-sieve aperture

Fig. 4 has provided the round-corner transition position on the pilot hole.

Below in conjunction with the accompanying drawing illustrated embodiment, the utility model is described in further details.

As shown in Figure 1, bubbling promoters (5) operated by rotary motion is at the upstream region of column plate, and it is the triangle of a projection or the structure of recessed cerioid shape.It can be artificially reduces the liquid layer thickness of upstream region, and the trace of liquid stream is changed, and induces and promotes liquid generation bubbling.The height of bubbling promoters (5) is generally 3～50mm, and width is generally 30～500mm.

Figure 3 shows that pilot hole (3) structure, the perk part ABCD of pilot hole (3) and substrate have a round-corner transition at BC line place, and its radius of corner is R1～R10mm, and its opening direction generally is that upward liquid stream direction of advance (7,8) is consistent with column plate (4).The width that cracks of pilot hole (3) is 5～50mm, and cracking highly is 0.1～5mm.The online AB of perk part ABCD of pilot hole, CD place have a round-corner transition respectively, and its radius of corner is R1～R20mm.Pilot hole perk part ABCD disconnects at line segment AD place and substrate, at a distance of a crack.

The offer density of pilot hole (3) on column plate can be uniformly, also can be uneven (offering more as the both sides arcuate region).Pilot hole (3) direction of cracking can be parallel with this column plate downflow weir, and also can be changes a suitable angle.

The operating process of high-efficiency guide sieve plate is as follows:

From the liquid that upper strata column plate downspout (2) flows down, thickness is thinned during through column plate (4) upstream bubbling promoters (5), is induced simultaneously bubble to occur, along the column plate flow further downstream.Gas from column plate (4) below with certain gas speed by pilot hole on the column plate (3) and sieve aperture (11), the gas by sieve aperture (11) continues to rise to last layer column plate (4).Gas level by pilot hole (3) is advanced, and kinetic energy is passed to liquid, thereby promotes the uniform and stable more following one deck column plate (4) that flows to of liquid along continuous straight runs, and gas then rises to the last layer tower, finishes the mass transport process of a column plate.Prove that in theory when liquid approached " piston flow " along column plate is evenly mobile, the separative efficiency of column plate was the highest; And when liquid mobile on column plate was in complete back-mixing, plate efficiency was minimum.Back-mixing is the key factor that reduces separative efficiency.Rationally be provided with and the distribution pilot hole in the utility model, make the gas that sprays from wherein, liquid evenly advances on the level promotion column plate, it is flowed approach " piston flow ", has improved the mass-transfer efficiency of column plate.Simultaneously, can artificially strengthen material flowing on column plate thus, avoid the liquid level drop of viscous material, major diameter tower etc. greatly, easily to block up problems such as tower, liquid flooding.Be located at the bubbling promoters induced flow bubbling of liquid stream upstream, eliminated " the disactivation district " on the column plate, increased number of bubbles and gas-liquid contact area on the column plate, improved plate efficiency significantly.Gas-liquid channel and output of column have been increased simultaneously.

The utility model can require design tower body diameter and the column plate number of plies is installed according to actual process.

According to experiment the utility model column plate mass-transfer efficiency approximately is 75～95%, and resistance drop is about 10～40mm water column/plate.

The utility model has outstanding substantive distinguishing features compared to the prior art, can comment as follows:

The utility model is compared with common sieve plate, bubble cap plate, valve plate, jet tray etc., because ad hoc Bubble promoting device, it can promote liquid bubbling on the column plate, and pushes away from the air-flow of pilot hole level ejection The steady flow of animal material, the stifled tower, liquid flooding, leakage, the mist that reduce or avoided other traditional column plate to be prone to The phenomenons such as foam is carried secretly, backmixing of liquid phase, thus the operation of having stablized tower has further realized surely Chemical Manufacture Fixed extensive, serialization work; Plate efficiency can improve 20～50%, has improved like this product quality, Reduced to produce and consumed; Production capacity can improve 30～80%, even higher, has improved Chemical Manufacture Scale and benefit. In addition because of in light weight, cost is low, its cost is equivalent to 40～50% of bubble cap plate, float valve 60～70% of column plate has reduced one-time investment.

Claims

1, a kind of high-efficiency guide sieve-plate tower, it comprises tower body (6), column plate (4), seal pot (1), downspout (2) etc., it is characterized in that also comprising the mass transfer component that the bubbling promoters (5) that is provided with on the column plate, pilot hole (3), sieve aperture (11) etc. are formed, bubbling promoters (5) is located at the upstream region that column plate (4) is gone up liquid stream, and pilot hole (3) is offered on column plate (4).

2, high-efficiency guide sieve-plate tower according to claim 1 is characterized in that being provided with on the sieve plate triangle of projection or the structure of recessed cerioid shape.

3, high-efficiency guide sieve-plate tower according to claim 1 is characterized in that pilot hole (3) width that cracks is 5～50mm, and cracking highly is 0.1～5mm.

4, high-efficiency guide sieve-plate tower according to claim 1 is characterized in that bubbling promoters (5) generally is the triangularity that raises up.

5, high-efficiency guide sieve-plate tower according to claim 1 is characterized in that the perk part ABCD of pilot hole (3) and substrate have a round-corner transition at BC line place, and its radius of corner is R1～R10mm.

6, high-efficiency guide sieve-plate tower according to claim 1 is characterized in that the online AB of perk part ABCD, the CD place of pilot hole (3) also has a round-corner transition respectively, and its radius of corner is R1～R20mm.

7, high-efficiency guide sieve-plate tower according to claim 1 is characterized in that pilot hole (3) perk part ABCD disconnects at line segment AD place and substrate, at a distance of a crack.

8, high-efficiency guide sieve-plate tower according to claim 1 is characterized in that the offer density of pilot hole (3) on column plate (4) can be uniformly, also can be uneven, can offer more pilot hole in the arcuate region of both sides.Pilot hole (3) direction of cracking can be to parallel with this column plate downflow weir, and also can be changes a suitable angle.