CN101480539B - One-way fixed float valve plate - Google Patents

Abstract

The invention discloses a column plate of a one-way fixed float valve, which comprises a valve opening (3), a valve plate (1) arranged on the column plate and a valve leg (4) connected to a column plate flat plate (2). The valve plate (1) is only provided with one valve leg (4), one surface of the valve plate (1) is fixed, and three surfaces of the valve plate (1) are hung; an included angle between the valve leg (4) and the column plate flat (2) is an acute angle; and the shape of the valve opening (3) on the column plate is identical with or similar to that of the valve plate (1). By adopting the structure, the invention improves the defects of excessive barrier generated by two valve legs of the traditional fixed valve and has low pressure drop and larger throughput, so that the mass transfer circumferential edge of the fixed valve is longer, the bubble is more uniform, and liquid on the column plate can be pushed towards the direction of an overflow weir by gas. Furthermore, the invention has the advantages of good flow distribution of the liquid on the surface of the column plate, higher separating efficiency, no movable piece and required connecting part, good dirt and block resistant property, simple structure, easy processing, and low production cost which is only 70- 80 percent of the common float valve column plate.

Description

One-way fixed float valve plate

Technical field

The present invention relates to the architecture advances of the fixed float valve plate in a kind of petroleum refining and the chemical engineering industry, relate in particular to a kind of one-way fixed float valve plate.

Background technology

Advantages such as it is big that fixed float valve plate has production capacity, and plate efficiency is high, and processing and maintenance cost are low have a wide range of applications at petrochemical industry.At present; Fixed float valve plate in the industry is mainly fixedly two kinds of float valves of circular fixedly float valve and bar shaped; These two kinds fixedly float valve mainly contain following characteristic: directly on the column plate plane, go out circular and bar shaped projection, as gas phase channel, the valve block front and back respectively have a valve leg to be connected with column plate with its rim openings; Support valve block, the angle on valve leg and column plate plane is about 90 degree.For round valve, gas vent is a circular arc, and the gas that sprays from the outlet first half has certain impetus to flow on the plate, and from the liquid that exports latter half of ejection flow on the plate is had interception, and the two kinds of effects in front and back weaken each other.For the fixing float valve of bar shaped, the gas emission direction is vertical with the flow direction, does not only push away the liquid effect; And the gas direction of adjacent two valve blocks ejection is relative, causes serious in the spray phenomenon; Cause back-mixing and entrainment easily, weaken the mass transfer function of column plate, reduce plate efficiency.Jet tray is provided with the tongue hole of inclination, and the direction that makes the ejection air-flow is near level, thereby entrainment greatly reduces; Air-flow has progradation to flow simultaneously, so the gas-liquid flow handling capacity is all higher, and gas flux is big; Liquid level drop is little, and no air-teturning mixed phenomenon can reduce plate pressure drop.Jet tray has the plate efficiency height, and liquid layer is thinner on the plate, and little advantage falls in column plate pressure.But jet tray is poor to the adaptive capacity of load fluctuation, and operating flexibility is little, and serious gas phase is carried phenomenon secretly and possibly caused plate efficiency to descend, and owing to liquid layer on the column plate is too thin, liquid residence time is short simultaneously, and the gas-liquid contact is insufficient, and plate efficiency significantly reduces.Based on this, patent ZL200510094252.6 and patent ZL02291525.7 propose rhombus fixedly float valve and guide securement float valve respectively.But because the existence of two valve legs can not solve spray and air-teturning mixed phenomenon fully.

Summary of the invention

The purpose of this invention is to provide a kind of one-way fixed float valve plate, can avoid the weak point of said fixing float valve structure, improve the operating efficiency of column plate.

Technical problem to be solved by this invention realizes through following technical scheme: it comprises valve opening, is located at the valve block on the column plate and is connected the valve leg composition on the column plate flat board; Said valve block has only a valve leg; Valve block is simultaneously fixing; Three unsettled, and the dull and stereotyped angle of valve leg and column plate is an acute angle, and the shape of the shape of valve opening and valve block is same or similar on the column plate.

Valve block of the present invention is the rectangle that arches upward, trapezoidal, rhombus, ligulate or polygonal plain film; The side-looking of valve block is the hook formation of triangle of trapezoidal, the no end of the no end or arc; The length of valve block is 15～100mm; Width is 10～50mm, and the most significant end of valve block is apart from the dull and stereotyped 5～25mm of column plate, and the openend of valve block exceeds the dull and stereotyped 5～15mm of column plate.

Valve opening length according to the invention is 15～100mm, and width is 10～50mm, and valve leg height is 5～25mm, and the dull and stereotyped angle of valve leg and column plate is 30～70 degree.

The invention has the beneficial effects as follows:

1, unidirectional fixedly float valve wall scroll valve leg structure has been improved traditional solid two valve legs of valve shortcoming that generation too much stops to gas, and pressure drop is low, and flux is bigger;

2, it is longer that unidirectional fixedly float valve front opening makes solid valve mass transfer periphery, and bubbling is more even, and help gas the liquid on the column plate is promoted to the downflow weir direction, and the tray surfaces liquid flow distributes better, and separative efficiency is higher;

3, unidirectional fixedly float valve does not have movable part and connector, and anti-dirty stifled performance is good;

4, unidirectional fixedly float valve is simple in structure, handling ease, and production cost is merely 70～80% of common valve plate.

Description of drawings

Below in conjunction with accompanying drawing the present invention is further described:

Shown in Figure 1 is the unidirectional fixedly float valve of rectangle valve block;

Shown in Figure 2 is the unidirectional fixedly float valve of rectangle valve block;

Shown in Figure 3 is the unidirectional fixedly float valve of rectangle valve block;

Fig. 4, Fig. 5, Fig. 6, Fig. 7, shown in Figure 8 be the valve block of different shape;

Fig. 9, Figure 10, Figure 11, shown in Figure 12 be the side view of different shape valve block.

The specific embodiment

One-way fixed float valve plate of the present invention comprises valve opening 3, is located at the valve block 1 on the column plate and is connected valve leg 4 compositions on the column plate dull and stereotyped 2; Said valve block 1 has only a valve leg 4; Valve block 1 one side is fixing; Three unsettled, and valve leg 4 is an acute angle with the angle of column plate dull and stereotyped 2, and the shape of the shape of valve opening 3 and valve block 1 is same or similar on the column plate.It is trapezoidal that the side-looking of rectangle valve block as shown in Figure 1 is the no end, and in the practical operation, gas energy through column plate the time consumes little, can effectively reduce pressure drop.Simultaneously; Because towards an end of downflow weir is opening, make gas can not only with the flow perpendicular flow, and can promote flow effectively downwards, forward and advance; Therefore both increased the time of contact of gas and liquid; Make again the reverse back-mixing of flow and to the spray phenomenon weaken, increased mass transfer force, improved transmission efficiency.

Fig. 2 and rectangle one-way fixed float valve plate shown in Figure 3, the side-looking of valve block is triangle of the no end and arc respectively, and these two kinds of structures can effectively reduce the consumption of gas kinetic energy, improve the motive force of ejection gas to flow.Unidirectional fixedly float valve of the present invention also can adopt the valve block of Fig. 4, Fig. 5, Fig. 6, Fig. 7, trapezoidal, rhombus shown in Figure 8, ligulate or any one shape of polygon, and the valve block of different shape can be made into its side view such as Fig. 9, Figure 10, Figure 11, triangle of trapezoidal, the no end of the no end shown in Figure 12 or the hook formation of arc.

The processing of one-way fixed float valve plate can be at first according to float valve shape need slot on column plate, and valve leg position is slot not, goes out the valve structure that arches upward then; Also can fixing float valve be severed towards the valve leg of downflow weir, be raised to certain distance, fixedly float valve is transformed into unidirectional fixedly float valve; Weld or be riveted on the valve hole plate after also can valve block being processed, opening is towards the downflow weir direction.

Embodiment 1

The methanol-water distillation system adopts one-way fixed float valve plate of the present invention to transform original fixed float valve plate.The number of plates is 30 layers, and tower diameter is 2400mm, and distance between plates 450mm, open ratio of plate are 7.8%, and material is a stainless steel, and float valve is that equilateral triangle is forward arranged.Valve block is a rectangle, the long 50mm of valve opening, and wide 20mm, it is trapezoidal that the valve block side-looking is the no end, and the angle on valve leg and column plate plane is 30 °, and the most significant end of valve block is apart from the dull and stereotyped 10mm of column plate, and the opening part of valve block (front end) is apart from the dull and stereotyped 5mm of column plate.After putting into operation, treating capacity has improved 10%, and plate pressure drop has reduced by 5%, at present stable operation 2 years.

Embodiment 2

Certain factory's rectifying column is transformed, and 50 layers of F1 float valve of former employing change unidirectional valve plate of the present invention at present, and tower diameter is 3200mm, distance between plates 450mm.Open ratio of plate is 12.5%, arranges unidirectional fixedly float valve on the column plate, for isosceles triangle is arranged.Valve block is a rhombus, the long 40m of valve opening, and wide 15mm, the valve block side-looking is triangle of the no end, and the angle on valve leg and column plate plane is 30 °, and the most significant end of valve block is apart from the dull and stereotyped 15mm of column plate, and the opening part of valve block (front end) is apart from the dull and stereotyped 8mm of column plate.Air inflow 50000Nm3/h, rectifying column is after transforming, and separating efficiency had more before improved 12%, and the column plate overall presure drop reduces 15%, and the phenomenon that the dirty stifled build-up of pressure that occurs in original running raises disappears.

Claims (1)

1. one-way fixed float valve plate; Comprise valve opening, be located at the valve block on the column plate and be connected the valve leg composition on the column plate flat board; It is characterized in that said valve block has only a valve leg, valve block is simultaneously fixing, and three unsettled; The dull and stereotyped angle of valve leg and column plate is an acute angle, and the shape of the shape of valve opening and valve block is same or similar on the column plate; Described valve block is the plain film of the rectangle that arches upward, trapezoidal, rhombus or ligulate; The side-looking of valve block is the hook formation of triangle of trapezoidal, the no end of the no end or arc; The length of valve block is 15～100mm; Width is 10～50mm, and the most significant end of valve block is apart from the dull and stereotyped 5～25mm of column plate, and the openend of valve block exceeds the dull and stereotyped 5～15mm of column plate; Said valve opening length is 15～100mm, and width is 10～50mm, and valve leg height is 5～25mm, and the dull and stereotyped angle of valve leg and column plate is 30～70 degree.

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