CN2657764Y - Reversal orifice plate wave filler - Google Patents

Abstract

The utility model provides a novel direction-changing orifice ripple filler which can make a ripple sheet of orifice ripple fillers have directional changes. The utility model significantly decreases wall-flow effect and is conducive to steam-liquid distribution, thereby reducing pressure drop, increasing the treatment ability and improving the mass transfer efficiency. Compared with prior widely used common orifice ripple fillers, the utility model has notably better operational performance and promising application prospect.

Description

The break-in perforated plate corrugated filler

Technical field

The utility model relates to a kind of novel regular material, belongs to the mass transfer separation equipment field.

Background technology

Packed tower is a kind of important mass transfer separation equipment, is widely used in mass transfer separation processes such as distillation in chemical industry, oil refining, petrochemical industry, the medicine and other fields, absorption, stripping.The structure of filler and performance have material impact to disposal ability, product quality and the technical-economic index of packed tower.Tower packing can be divided into random packing (also claiming granular filler) and structured packing two big classes, and the utility model belongs to structured packing.

The kind of structured packing is a lot, belongs to the ripple type filler mostly.Its material has metal, pottery or plastics.Metal material has metal book plate, metal otter board or woven wire etc.What wherein consumption was wider and representative is perforated plate corrugated filler.Perforated plate corrugated filler in initiative in 1977, is called Mellapak by Switzerland Su Leshou company, the perforated plate corrugated type filler separately of the numerous and confused release in various countries after this, and basic structure is similar, and the part is slightly different.Perforated plate corrugated filler is made up of the corrugated plate of some arranged verticals, and the corrugated plate upper punch has the ripple that is parallel to each other, the at 45 or 30 ° of angles of ripple and vertical direction, and the drift angle of ripple is about 90 °, has the aperture of some Ф 4 or Ф 5 on the corrugated plate.90 ° each other of the runners of adjacent two corrugated plates.In the less tower of the diameter that connects with flange, ripple packing is made some disks, and diameter is slightly less than tower diameter.The tower bigger to diameter, every dish filler is divided into several piece, puts into tower by hand-hole, assembly unit in tower.The corrugated plate of two dish fillers is mutually 90 ° of installations up and down, and fluid is fully mixed in tower.

But, owing to the ripple on the corrugated plate of perforated plate corrugated filler is parallel to each other, and being a direction, the passage that causes fluid makes liquid flow down along the tower wall facing to the tower wall easily, forms so-called " wall stream effect ".It is insufficient that " wall stream effect " causes partially liq to contact with gas, thereby reduce mass-transfer efficiency; And made vapour-liquid two-phase skewness on tower section, thereby increased pressure drop and reduced the disposal ability of tower.

Summary of the invention

At the above-mentioned shortcoming of perforated plate corrugated filler, we have developed the break-in perforated plate corrugated filler, more become evenly to reduce " wall stream effect ", vapour-liquid is distributed on tower section, thereby improve mass-transfer efficiency, reduce pressure drop, the increase disposal ability.

The utility model is achieved through the following technical solutions.Processing and the geometric parameter such as peak height, the pitch of waves, specific area, inclination angle of described break-in perforated plate corrugated filler on corrugated plate, basic identical with the perforated plate corrugated filler of corresponding specification, assembling and packing box the assemble method tower in of corrugated plate in packing box, also the perforated plate corrugated filler with general is identical.But the utility model improves on corrugated plate, and the ripple on the corrugated plate is taken place once or once above direction variation.By the variation of ripple direction, can reduce direct runner, and the dirty liquid of Yan Tabi is carried out the coffin upon burial to tower, to reduce " wall stream effect " towards the tower wall; By the variation of ripple direction, help vapour-liquid and evenly distribute; And in the runner corner, the descending liquid in gas that rises on the longshore current road and longshore current road has been strengthened the vapour-liquid contact in this variation that direction all takes place, and helps the raising of mass-transfer efficiency.

In the practice, also the corrugated plate of metal book plate, metal otter board or woven wire material ripple packing can be improved in order to upper type, its ripple is taken place once or once above direction variation.

The utility model compared with prior art, its beneficial effect is to reduce pressure drop, increases disposal ability, and obviously improves mass-transfer efficiency, has important practical value.

Description of drawings

Fig. 1 is the schematic diagram of the perforated plate corrugated type filler of break-in, and Fig. 1-a is a front view, and Fig. 1-b is the A-A cutaway view.1 is corrugated plate among the figure; 2 is crest, and h is a peak height; 3 is aperture; H is high for dish; 2B is the pitch of waves; S is the length of side of crest; A is the ripple drift angle; β is the angle of crest and vertical axis, the knuckle that γ changes for the ripple direction.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.Corrugated plate 1 thickness is 0.1～1mm among the figure; Peak height h=4～the 25mm of crest 2; The aperture of aperture 3 is Ф 4～Ф 8; Coil high H according to the size of tower diameter and difference is generally H=50～300mm; Pitch of waves 2B=7～45mm; The length of side S=5 of crest～35mm; Ripple drift angle a is about 90 °; The angle β of crest and vertical axis is generally 45 ° or 30 °, and specific area is 100～700m ²/ m ³, voidage is 0.90～0.99.After ripple generation direction on the corrugated plate changed, the knuckle γ that the ripple direction changes was 80 °～130 °.Figure 1 shows that ripple generation first power to the schematic diagram that changes, change that its version can by parity of reasoning if once above direction takes place ripple.

The utility model break-in perforated plate corrugated filler has carried out the experimental study of hydrodynamics and mass-transfer performance, and has carried out experiment with the common ripple orifice plate filler of identical geometric parameter and compared in the lucite tower of laboratory.Experimental result shows, the utlity model has following remarkable advantage:

1, break-in perforated plate corrugated filler " wall stream effect " obviously reduces, and helps improving mass-transfer efficiency.

2, the utility model helps the even distribution of gas and liquid, thereby pressure drop reduces, and spotting out gas speed improves, and shows that this filler has the high processing ability.

3, in the corner of this filler vapour-liquid runner, the gas-liquid contact is fierce, promotes phase border Surface Renewal, helps the raising of mass-transfer efficiency.

4, through 250 model break-in perforated plate corrugated filler is compared with the experiment of 250 model plain bore mellapak packing (both geometric parameters are identical), pressure drop of the present utility model has reduced about 20%, the raising of spotting out gas speed is about 20%, and mass-transfer efficiency has improved 10%～20%.

Below be one group of 250 model break-in perforated plate corrugated filler and the experiment comparing data of 250 model plain bore mellapak packing (both geometric parameters are identical):

(annotate: 250K is a 250 model break-in perforated plate corrugated filler, and 250Y is a 250 model plain bore mellapak packing; L is a sprinkle density, the m of unit ²/ m ³.h, F is a kinetic energy factor, and unit is $m/s.{(\mathrm{kg}/m^3)}^{\frac{1}{2}},$ W is general to be general vapour speed, the m/s of unit; HETP is the theoretical plate equivalent altitude, the m of unit; Δ P is pressure drop, the Pa/m of unit).

Table one pressure drop ratio is (air-water system, L=20m ²/ m ³.h)

F	?1.0	?1.5	?2.0	?2.3
					ΔP 250K，Pa/m	?98	?212	?285	?386
ΔP 250Y，Pa/m	?120	?172	?359	?510

Table two liquid flooding vapour speed ratio is (air-water system)

?L，m 2/m 3.h	?10	?20	?40	?60
					?W General 250K	?2.65	?2.51	?2.19	?1.78
?W General 250Y	?2.40	?2.03	?1.78	?1.46

Table three mass-transfer efficiency is (air-water-CO relatively ₂System, L=10m ²/ m ³.h)

Empty tower gas velocity, m/s	?0.65	?1.0	?1.5	?2.35
					(HETP) 250K，m	?0.32	?0.31	?0.30	?0.315
(HETP) 250Y，m	?0.40	?0.38	?0.34	?0.39

Claims (2)

1, a kind of break-in perforated plate corrugated filler is characterized in that, described ripple packing, the ripple of its corrugated plate take place once or once above direction changes, and the knuckle γ that the ripple direction changes is 80 °～130 °.

2, break-in perforated plate corrugated filler as claimed in claim 1, it is characterized in that, thickness is 0.1～1mm, and the peak height of crest is 4～25mm, and the aperture is Ф 4～Ф 8, the dish coca is different according to the size of tower diameter, be generally 50～300mm, the pitch of waves is 7～45mm, and the length of side of crest is 5～35mm, the ripple drift angle is about 90 °, and the angle of crest and vertical axis is generally 45 ° or 30 °.Specific area is 100～700m ²/ m ³, voidage is 0.90～0.99.