CN2698432Y

CN2698432Y - Bar shape float valve with tongue holes

Info

Publication number: CN2698432Y
Application number: CN 200420031709
Authority: CN
Inventors: 陈世醒; 陈世俊; 金子明; 杨绍辉; 翟杰
Original assignee: Liaoning Shihua University
Current assignee: Liaoning Shihua University
Priority date: 2004-05-21
Filing date: 2004-05-21
Publication date: 2005-05-11
Anticipated expiration: 2014-05-21

Abstract

The utility model discloses a bar shape float valve with tongue holes for the air-liquid contact element in the plate type tower, which can be widely used for the mass transfer process, such as the distillation in the petroleum processing, the absorption, etc. The float vale is a long bar bench-shaped float valve composed of a valve surface and valve legs. The rectangular valve surface is provided with tongue holes with the same direction as the liquid flow. The tongue hole point is provided with tongue blades in inclined installation, so as to avoid the negative direction mixing and the liquid level fall of the liquid on the tower plate and eliminate the mass transfer dead area above the float valve. The two long edges of the valve surface of the float valve are bended downward, and the edge point is provide with a spacing nest slightly bending downward, which can avoid the fluctuation phenomenon that the valve surface is unstable in the rising and falling, and prevent the adhesion and the corrosion of the valve surface and the tower plate. The utility model is simple in structure and reasonable in design. Compared with the F1 type float valve tower disk and the tongue hole tower plate in the background technique, the bar shape float valve with tongue holes has the advantages of large operation elasticity and good separation effect. With the same separation requirement, the treating capacity can be improved by 20%, and the mass transfer efficiency is greatly improved.

Description

Tongue hole rectangular valve

One, technical field

The utility model relates to a kind of gas-liquid contact element that is used for mass transport processes such as PETROLEUM PROCESSING distillation, absorption, specifically is exactly the float valve in the plate column.

Two, background technology

Mass transport processes such as the rectifying of PETROLEUM PROCESSING, absorption are plate columns with the equipment that reaches mainly.Its basic function is the chance that abundant contact is provided for gas, liquid two-phase, and mass transport process is carried out rapidly and effectively, and gas, liquid two-phase after the contact are in time separated, and does not carry secretly mutually.

The type of plate column is a lot, and float valve type tower tray is big because of its production capacity, operating flexibility is big, plate efficiency is high, simple in structure being used widely.But F1 type valve tower commonly used is when operation, and along with the increase of gas speed, float valve begins to be blown afloat, because the liquid potential difference is arranged on the column plate, the time that each float valve is blown open is also inconsistent, near being blown afloat because of the shallow elder generation of liquid layer of downflow weir.In addition, along with the variation of gas speed, the degree that float valve is blown afloat is also different.The float valve that is blown afloat fluctuates in liquid layer, automatic adjustments of gas circulation area, so valve tower can be worked under wider gas speed.But the weakness of this gas dispersion type column plate is gas, liquid is to contact under bubbling state or foam state, need time and space, and the existence of liquid level drop on the plate causes the distribution of gas inequality, gas very easily forms short circuit at the liquid layer thin location, has influenced separative efficiency.In addition, F1 type float valve is in rotation status under mode of operation, often because of the wearing and tearing of valve leg come off, makes normal separation process unsustainable.

In order to overcome the above-mentioned shortcoming of F1 type float valve, a kind of ejection-type jet tray has been proposed the sixties, promptly on column plate, go out many ligulates hole, ligule and plate face are angled, open to column plate overflow exit, when gas is sprayed by the ligulate hole, consistent with liquid flow path direction on the plate, liquid stream is promoted, avoided liquid level drop, improved separative efficiency.But because the sectional area that supplied gas is passed through on the ligulate hole column plate is certain, when gas speed is low, can not stop liquid to leak, operating flexibility is reduced through the ligulate hole.

Three, summary of the invention

The tongue hole rectangular valve that the utility model purpose provides a kind of F1 of taking into account type float valve and ligulate hole column plate advantage, maximizes favourable factors and minimizes unfavourable ones.

Tongue hole rectangular valve is by rectangular valve face and 2 rectangular stool shape float valves that the valve leg constitutes, and has on rectangular valve face with the identical ligulate hole of liquid flow path direction, and there is the ligule that is obliquely installed at place, ligulate hole.The valve leg of two support valve faces lays respectively at the minor face place of rectangle valve face.The outside, 2 long limits of rectangle valve face is bent downwardly, and its edge dashes slightly decurved spacing nest.The tongue hole rectangular valve that adopts said structure is placed the rectangle valve opening of column plate, and the valve leg wearing and tearing that can avoid producing because of rotation cause the phenomenon that comes off.Because the minor face place of this float valve establishes the valve leg, shutoff the space of air-flow back-mixing, help improving separative efficiency.Particularly have the ligulate hole on the valve face of this float valve, this position gas, liquid contact condition have been improved, and ligulate gas flow hole direction is consistent with the liquid flow path direction, can guarantee that in mass-transfer progress liquid stream is promoted, avoided liquid to pass to mixing and the liquid level drop problem, when improving mass-transfer efficiency, pressure drop is also reduced simultaneously.

In the operating process of the present utility model, when gas speed was low, valve face was closed, and gas is by the ejection of ligulate hole, and bubbling is gentle, and valve face does not vibrate.Since the ligule subtended angle in ligulate hole generally less (about 20 degree), this airflow direction almost horizontal, the drop of generation has initial velocity upwards hardly, and mist entrainment is minimum.Along with gas speed increases, float valve rises, and big direction that vertical liquid flows from the valve face slit of air-flow outwards sprays.Two strands of staggered air-flows of valve face slit and tongue hole ejection have aggravated the turbulence of liquid, have strengthened the contact of gas, liquid, help the carrying out of mass transfer, and the existence of ligulate hole and ligule, have also increased the operating flexibility of plate column.

Four, description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is installed in closed condition schematic diagram in the valve plate for the utility model.

Five, the specific embodiment

Tongue hole rectangular valve shown in Fig. 1 is a rectangular stool shape, and the ratio on the long and short limit of rectangular valve face 1 is 2-5.The identical ligulate hole count of being opened on the valve face 1 of same liquid flow path direction is 1-3, and the ligule 2 that 6 tops, ligulate hole are obliquely installed is the 15-30 degree with the angle of inclination of valve face, and Lift is 5-10mm.In actual applications, the Lift of the number in its ligulate hole and ligule 2 can be selected according to the gas-liquid load situation.Be arranged on the outside separately switching an angle of 90 degrees (see figure 2) of footing 5 of two the valve legs 3 in minor face place of rectangular valve face 1, the maximum height that float valve rose on column plate 7 when this kind structure can be used to limit operation guarantees normally carrying out of mass transport process.In actual application, in order to reduce mounting hardness, can in advance the footing 5 of a valve leg 3 be pulled and turn 90 degrees (see figure 1), treat that this float valve packs into behind the rectangle valve opening of column plate, at the scene another valve leg is pulled with specialist tools again and turn 90 degrees.The outside, the long limits of two of valve face 1 of the present utility model is bent downwardly, and edge dashes a pair of slightly decurved spacing nest 4, make valve face be in when static and column plate between still leave certain slit.Like this, when tolerance hour gas still can avoid valve face to play, close unstable pulsation phenomenon by slit bubbling equably, simultaneously because the existence of spacing nest 4, valve face 1 and column plate 7 plate faces are to contact, and can prevent the adhesion and the corrosion of valve face and column plate.

The utility model should be according to ligulate hole and the identical direction of liquid stream in the installation of column plate bubbling area, and promptly the long limit of tongue hole rectangular valve is parallel with the liquid flow path direction.Its arrangement can be divided into in-line arrangement, fork row.Fork row's effect is better, and fork row mode is adopted in suggestion.

The utility model is simple in structure, and is reasonable in design.It is big to use its operating flexibility in board-like tower tray, good separating effect.Compare with F1 type float valve tray in the background technology and ligulate hole column plate, under identical separation requirement, the treating capacity behind installation the utility model can improve 20 percent, has improved mass-transfer efficiency greatly.

Claims

1, a kind of tongue hole rectangular valve that is used for the plate column float valve tray, comprise rectangular valve face (1), it is characterized in that this float valve is the rectangular stool shape float valve that is made of valve face (1) and 2 valve legs (3), on rectangular valve face (1), have with the identical ligulate hole (6) of liquid flow path direction, the ligule (2) that ligulate hole (6) are located to be obliquely installed.

2, tongue according to claim 1 hole rectangular valve is characterized in that described two valve legs that support valve faces lay respectively at the minor face place of rectangle valve face.

3, tongue according to claim 1 and 2 hole rectangular valve is characterized in that the outside, 2 long limits of described rectangle valve face (1) is bent downwardly, and its edge dashes slightly decurved spacing nest (4).

4, tongue according to claim 1 and 2 hole rectangular valve, the ratio that it is characterized in that the long and short limit of described rectangle valve face (1) is 2-5.

5, tongue according to claim 1 and 2 hole rectangular valve is characterized in that the ligulate hole count on the described valve face (1) is 1-3.

6, tongue according to claim 4 hole rectangular valve is characterized in that the ligule (2) that place, described ligulate hole is obliquely installed and the angle of inclination of valve face are the 15-30 degree, and Lift is 5-10mm.

7, tongue according to claim 1 and 2 hole rectangular valve, the footing (5) that it is characterized in that described 2 valve legs (3) be outside switching an angle of 90 degrees separately.