CN2081753U

CN2081753U - Column plate of guide float valve

Info

Publication number: CN2081753U
Application number: CN 91215110
Authority: CN
Inventors: 路秀林; 刘秀囡; 赵培
Original assignee: East China University of Science and Technology
Current assignee: East China University of Science and Technology
Priority date: 1991-02-02
Filing date: 1991-02-02
Publication date: 1991-07-31

Abstract

The utility model designs a column tray of a guide float valve which is arranged on the tower tray. The guide float valve is rectangular, composed of a valve cap, a guide hole, a support angle, valve legs and valve feet and arranged in a rectangular valve hole on the tower tray. The guide float valve can be floated upward and downward when operation. The utility model has the advantages of reliable structure, zero wear and no calling of a float valve, little gradient of the upper liquid level of the tower tray, uniform gas distribution, little liquid back mixing, no liquid stagnation region, high efficiency of the tower tray, large processing ability, etc. The utility model can be widely used for gas-liquid mass transfer operations such as distillation, absorption, steam stripping, etc.

Description

Column plate of guide float valve

The utility model relates to a kind of core component-float valve and valve plate of valve tower.

It is industrial because valve tower has good operating flexibility and higher plate efficiency, extensive use in chemical industry and petroleum industry.But, present industrial common applied F ₁There is the following significant disadvantage in type valve plate (valve gap and valve opening are garden shape):

1. structural reliability is poor.In operation, float valve is ceaselessly rotation under the air-flow effect, causes the heavy wear of valve leg and valve opening, causes float valve to come off from valve opening easily.This has not only influenced plate efficiency, and is forced to shut-down (breakdown) mainteance sometimes, has promptly influenced production, has increased maintenance workload again.

2. the gradient of liquid level on the column plate is bigger, makes distribution of gas inhomogeneous.

3. owing to all the winds blow out from the valve opening effluent air, the backmixing of liquid phase on the column plate is bigger.

4. there is the liquid stagnation region on column plate the both sides of liquid flow path direction (arcuate section).

F ₁The above-mentioned shortcoming of type valve plate has had a strong impact on the operating characteristics of valve tower, and along with the continuous development of technology, people expect the valve plate that developmental research is novel.

The purpose of this utility model is to overcome F ₁The above-mentioned shortcoming of type valve plate, developmental research a kind of guide float-valve and guide float valve tray of rectangle.Advantage such as it has reliable in structure, gradient of liquid level is little, distribution of gas is even, backmixing of liquid phase is little, no liquid stagnation region, operating flexibility are good, thus the operating characteristics and the mass-transfer efficiency of valve tower further improved.

Design of the present utility model is:

1. adopt the float valve of rectangle, to overcome the F of garden shape ₁The mechanical wear of type float valve and the shortcoming that comes off have increased reliability of structure.

2. on the valve gap of rectangle float valve, one or more pilot hole is set, its opening direction is consistent with the liquid flow path direction on the column plate, flow forward to promote liquid by gas kinetic energy by the pilot hole ejection, thereby can eliminate the gradient of liquid level on the column plate, make by the distribution of gas of column plate evenly, the gas-liquid contact condition on the column plate is kept evenly.

3. the arc position of liquid flow path direction both sides on column plate owing to suitably be provided with guide float-valve, flowed the same maintenance of liquid forward, thereby has been eliminated " dead band " on the column plate---liquid stagnation region.

4. the rectangle valve opening on the column plate, its long limit is parallel to the liquid flow path direction, and is vertical with the liquid flow path direction maintenance on the column plate from the gas direction that float valve two effluents go out in operation after installing the rectangle float valve, thereby reduced the back-mixing of liquid phase on the column plate.

5. dispose by difference guide float-valve on the column plate, as: be guide float-valve all on the column plate, but the guiding hole count on the float valve can be different, perhaps, suitably arrange the rectangle float valve in guide float-valve and non-tape guide hole on the column plate, to adapt to different requirements.

According to above-mentioned design, the inventor designs and has developed a kind of rectangle valve plate that has pilot hole, and promptly the said guide float valve tray of the utility model illustrates design feature of the present utility model below in conjunction with accompanying drawing.

The partial view of the guide float valve tray when Fig. 1 guide float-valve is in standard-sized sheet.

The partial view of the guide float valve tray when Fig. 2 guide float-valve is in closed condition.

Wherein: 1---valve gap; 2---pilot hole;

3---an angle; 4---the valve leg;

5---the valve pin; 6---base plate;

7---valve opening; 8---gas passage.

When the guide float-valve standard-sized sheet, gas passage area is maximum, and when guide float-valve was closed, gas passage area was minimum.H is the maximum opening of guide float-valve, and h is the minimum aperture of guide float-valve.

The deployed height of d---pilot hole, suitable height are the 2-5 millimeter.

Fig. 3 is the schematic diagram that contains the guide float-valve of a pilot hole.

Fig. 4 is the schematic diagram that contains the guide float-valve of two pilot holes.

Wherein:

B is the width of guide float-valve, is generally 30～50 millimeters, and L is the length of guide float-valve, and suitable L/B is 1.5～4.

Angle 3 is positioned at four jiaos of valve gap, and a and b are respectively that it is long and wide, are about 4～8 millimeters usually, props up an angle 3 and slightly is bent downwardly, and a minimum aperture h is arranged when guaranteeing that guide float-valve is closed ₀, suitable h ₀It is 1～3 millimeter.

The function of valve pin 5 is to guarantee that guide float-valve does not come off from valve opening, and with the maximum opening h of valve leg 4 restricted guidance float valves, the maximum opening h of guide float-valve depends on designing requirement, and h is 8～15 millimeters usually.

Guide float-valve can be stamped to form, and in the valve opening 7 of packing into then, bends valve pin 5 again.

The layout of guide float-valve on the guide float valve tray can be decided according to technological requirement, can all be guide float-valve, can partly be guide float-valve also.Pilot hole on the guide float-valve can be one, also can be more than one.

The said guide float valve tray of the utility model, application of air-water and air-water-CO ₂System has carried out the structural test of system in experimental provision, hydrodynamics test and mass transfer tests, and result of the test shows that the said guide float valve tray of the utility model has following significant advantage:

1. reliable in structure, guide float-valve does not have wearing and tearing, does not come off, and is easy for installation, and maintenance is easily.

2. significantly reduce on the column plate gradient of liquid level, reduce liquid dispersion, eliminated the liquid stagnation region on the column plate, thereby plate efficiency obviously improves, with F ₁The type float valve is compared, and plate efficiency can improve 10～20%.

3. disposal ability increases, the F of guide float valve tray and garden shape ₁The type float valve is compared its disposal ability and can be increased more than 20%.

In addition, on probation by commercial plant proves the said guide float valve tray of the utility model, can be widely used in the mass transfer operations such as distillation, absorption, stripping under normal pressure or the pressurized conditions.

Claims

1, a kind of guide float valve tray, form of the present utility model being characterised in that by parts such as float valve, base plate, downspout, downflow weirs:

(1) column plate is provided with guide float-valve, contains one or more pilot hole on the guide float-valve.

(2) said guide float-valve is a rectangle, is made up of valve gap 1, pilot hole 2, an angle 3, valve leg 4 and valve pin 5, and it places rectangle valve opening 7 on the base plate 6 by valve leg 4 and valve pin 5.

2, guide float valve tray as claimed in claim 1 is characterized in that all or part ofly on the column plate being the guide float-valve of rectangle.

3, guide float valve tray as claimed in claim 1 is characterized in that said rectangle guide float-valve, and its valve gap width is B, and the suitable size of B is 30～50 millimeters, and length is L, and L/B is 1.5～4.

4, guide float valve tray as claimed in claim 1, the length direction that it is characterized in that the rectangle valve opening on the column plate liquid flow path direction during with tower plate operation is consistent.

5, guide float valve tray as claimed in claim 1 is characterized in that the rectangle guide float-valve established on the column plate, and the opening direction of its pilot hole is consistent with the liquid flow path direction on the column plate, and the height d that dehisces of pilot hole is 2～5 millimeters.