Novel large-flux fixed valve tray

Abstract

The novel large-flux fixed valve tray comprises a tray, valve holes and fixed valves, each fixed valve comprises a fixed mounting part, at least two fixed valve plates are arranged on the outer side of each fixed mounting part, fixed valve legs are arranged between the adjacent fixed valve plates or on the outer sides of the fixed valve plates, and the fixed valve legs are connected with the tray. The number of the fixed valve legs is smaller than or equal to that of the fixed valve plates, and gaps are formed between the fixed valve plates and the valve holes and between the fixed valve legs and the valve holes. Gas moves from the inside of the valve to the tail end of the fixed valve plate, and the gas-liquid contact area is increased; the kinetic energy factor of gas coming out from the side surfaces of the gap between the fixed valve plate and the valve hole and the gap between the fixed valve leg and the valve hole is reduced, and the pressure is reduced by 15-20% compared with that of a traditional float valve tray; after the gas is discharged from the tower tray, vertical momentum is converted into transverse momentum, so that entrainment is relatively small; the operation elasticity is 20%-130%, and the operation elasticity of the device is large.

Description

Technical Field

[0001] The present application belongs to the technical field of tower trays, and in particular relates to a large-flux fixed-valve tower tray. Background Art

[0002] The development and production of the chemical industry are inseparable from the continuous development and progress of towers and their internal components. Tower internals play a vital role, especially in the separation efficiency of the tower and the control of tower pressure drop. Therefore, the form and structure of tower internals are also the focus of research.

[0003] At present, the main forms of towers are packed towers and plate towers. Plate towers mainly include sieve plate plates, bubble cap plates, valve plates, three-dimensional mass transfer plates, corrugated plates and other different forms of plates. Each form of plate has its applicable fields and also has its own advantages and disadvantages:

[0004] (1) The sieve plate tower has a simple structure, but has limited operational flexibility and low mass transfer efficiency for processes with a large liquid-gas ratio. (2) The bubble cap tower has great operational flexibility, but has a complex structure, high cost, low production capacity and plate efficiency. Since the tooth gap opening is fixed, it is not adaptable to changes in steam load. When the steam velocity is low, the gas-liquid contact is poor. When the gas velocity is high, the steam can easily blow away the liquid. (3) The floating valve tower has greater operational flexibility and can better adapt to changes in feed volume. It has better gas-liquid agitation, less mist entrainment, longer contact time, and better mass transfer effect. However, the steam is ejected along the periphery of the rising steam pores, and there is still reverse mixing of the liquid. , thus reducing the mass transfer efficiency; (4) When the corrugated tray is in operation, the liquid is constantly stirred by steam, destroying the condensation of suspended matter, so that the tray is always kept clean, so it has a self-cleaning effect, but it can still cause clogging of the holes in places where colloids are easily generated, and it is also easy to cause mist entrainment; Among them, the floating valve tray has greater operating flexibility, better gas-liquid stirring, less mist entrainment, longer contact time, and better mass transfer effect. It is most widely used in the petrochemical field. Common floating valves include circular valves, rectangular valves, trapezoidal valves, diamond valves, etc. In order to overcome the defects of the floating valve in the prior art, a new floating valve structure has emerged as follows:

[0005] Prior art 1: In a new type of tower plate with large flux and uniform gas-liquid distribution with patent application number 2016108669304, a technical solution is disclosed, including a tower plate, a valve hole and a float valve; the edge of the valve plate of the float valve is arranged alternately by convex arcs and concave arcs, and there are three convex parts formed by the convex arcs and three concave parts formed by the concave arcs, and the curvature radius of the three convex parts is less than or equal to the curvature radius of the three concave parts; the valve leg of the float valve is vertically fixed to the lower end surface of the convex part, and there are three valve legs and they are distributed at equal intervals; the edge of the valve plate is also provided with a spacing strip; the new type of large flux and uniform gas-liquid distribution floating valve tower plate provided by the invention has large operating flexibility, high mass transfer efficiency, uniform airflow dispersion, and sufficient gas-liquid contact; however, in this application, due to the limitation of the structure of the float valve itself, the tower plate valve arrangement method is relatively single, the space utilization rate is low, and the operating flexibility is limited, which can no longer meet the requirements of increasing production, improving quality, and reducing consumption.

[0006] Therefore, a new fixed valve tower tray is needed to solve the above technical problems. Summary of the invention

[0007] In view of this, the invention aims to propose a large-flux fixed-valve tower tray, which can improve the space utilization rate of the tower tray and meet the requirements of increasing production, improving quality and reducing consumption.

[0008] The present application provides a novel large-flux fixed-valve tower plate, comprising a tower plate, on which a plurality of valve holes are opened, on which fixed valves are installed, the fixed valves comprising a fixed mounting portion, on the outer side of which at least two fixed valve plates are arranged, between adjacent fixed valve plates or on the side of the fixed valve plate away from the fixed mounting portion, fixed valve legs are arranged, the fixed valve legs are connected to the tower plate, the number of the fixed valve legs is less than or equal to the number of the fixed valve plates, and gaps are arranged between the fixed valve plates and the valve holes, and between the fixed valve legs and the valve holes.

[0009] As a preferred solution, the fixed valve plates are evenly arranged on the outside of the fixed mounting portion.

[0010] As a preferred solution, the fixed valve leg is tilted, and the angle between the fixed valve leg and the tower plate is 20°-80°.

[0011] As a preferred solution, the fixed installation part is in the shape of an arc, a circle, a triangle, a rhombus, a rectangle, an ellipse, a clover leaf, or a runway, or the projection shape of the fixed installation part on the tower plate is in the shape of an arc, a circle, a triangle, a rhombus, a rectangle, an ellipse, a clover leaf, or a runway.

[0012] As a preferred embodiment, the fixed valve plate is in any one of an arc shape, a circle, a clover shape, a triangle, a rhombus shape, a rectangle, an ellipse shape, and a tongue shape, or the projection shape of the fixed valve plate on the tower plate is in any one of an arc shape, a circle, a clover shape, a triangle, a rhombus shape, a rectangle, an ellipse shape, and a tongue shape.

[0013] As a preferred solution, the area of ​​the valve hole is larger than the projection area of ​​the fixed valve on the tower plate.

[0014] As a preferred solution, the area of ​​the valve hole is equal to 1.2-1.9 times the projection area of ​​the fixed valve on the tower plate.

[0015] As a preferred solution, the fixed valve and the tower plate are integrally formed.

[0016] As a preferred solution, the fixed valve plate as a whole is in the shape of an arc with a middle portion convex upward.

[0017] As a preferred solution, serrations are provided on the edge of the fixed valve plate.

[0018] This application has the following advantages:

[0019] 1. The setting of at least two valve plates, the gaps between the fixed valve plate and the valve hole, and between the fixed valve leg and the valve hole can increase the gas-liquid contact area, significantly reduce the amount of mist entrainment, increase the operating flexibility, and improve the mass transfer efficiency;

[0020] 2. The solid valve stamping can ensure that the solid valve is arranged evenly and tightly, making full use of the space, increasing the opening rate and the processing capacity, which is suitable for large volume occasions;

[0021] 3. The shape of the valve hole is the same as the projection shape of the fixed valve on the tower plate, so that the valve hole has a curved edge with the same shape as the valve plate, which increases the perimeter length of the unit valve hole area and is conducive to gas dispersion;

[0022] 4. The setting of serrations plays a role in secondary mass transfer and guidance, improving the gas-liquid contact on the upper surface of the fixed valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of an embodiment of the present invention from an angle 1;

[0024] Figure 2 This is a structural diagram of angle 2 of embodiment 1 of the present utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the valve hole of the first embodiment of the utility model;

[0026] Figure 4 This is a schematic structural diagram of a fixed valve according to the first embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0028] Figure 6This is a schematic diagram of the structure of the valve hole of the second embodiment of the utility model;

[0029] Figure 7 This is a schematic structural diagram of a fixed valve in Embodiment 2 of the present utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the fixed valve of the third embodiment of the utility model;

[0031] Fig. 9 Another structural schematic diagram of the fixed valve of the third embodiment of the utility model;

[0032] Fig.10 It is a structural schematic diagram of a fixed valve in Embodiment 4 of the present utility model;

[0033] Fig.11 In the same tower, the tray of Example 1 is on the top, and the tray of prior art 1 is on the bottom, and the liquid volume is 4m 3 Schematic diagram of the pressure difference between the two trays at / h;

[0034] Fig.12 In the same tower, the tray of the prior art 1 is on the top, and the tray of the embodiment 1 is on the bottom, and the liquid volume is 4m 3 Schematic diagram of the pressure difference between the two trays at / h;

[0035] Fig.13 In the same tower, the tray of Example 1 is on the top, and the tray of prior art 1 is on the bottom, and the liquid volume is 8m 3 Schematic diagram of the pressure difference between the two trays at / h;

[0036] Fig.14 In the same tower, the tray of the prior art 1 is on the top, and the tray of the embodiment 1 is on the bottom, and the liquid volume is 8m 3 Schematic diagram of the pressure difference between the two trays at / h;

[0037] Description of reference numerals:

[0038] 1. Tower plate; 2. Valve hole; 3. Fixed valve; 4. Fixed mounting part; 5. Fixed valve plate; 6. Fixed valve leg; 7. Gap; 8. Sawtooth. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0041] Embodiment 1:

[0042] like Figures 1 to 4 As shown, a novel large-flux fixed valve tray comprises a tray 1, wherein a plurality of valve holes 2 are evenly formed on the tray 1, and a fixed valve 3 is mounted on the valve hole 2. The shape of the valve hole 2 is the same as the projection shape of the fixed valve 3 on the tray 1, and the area of ​​the valve hole 2 is larger than the projection area of ​​the fixed valve 3 on the tray 1. Preferably, the area of ​​the valve hole 2 is equal to 1.2-1.9 times the projection area of ​​the fixed valve 3 on the tray 1; preferably, in order to facilitate processing, the fixed valve 3 is evenly and tightly arranged to make full use of the space. The fixed valve 3 is integrally formed with the tower plate 1, that is, the fixed valve 3 is stamped on the tower plate 1; the fixed valve 3 includes a fixed installation portion 4, and the fixed installation portion 4 can be in the shape of an arc, a circle, a triangle, a rhombus, a rectangle, an ellipse, a clover, or a runway, or the projection shape of the fixed installation portion 4 on the tower plate 1 is in the shape of an arc, a circle, a triangle, a rhombus, a rectangle, an ellipse, a clover, or a runway. The technicians can adjust the shape according to the specific situation. The embodiment takes a circle as an example. At least two fixed valve discs 5 are arranged on the outside of the fixed mounting portion 4. Preferably, the fixed valve discs 5 are evenly arranged on the outside of the fixed mounting portion 4 and are integrally formed. The fixed valve disc 5 adopts any one of an arc shape, a circle, a clover shape, a triangle, a rhombus shape, a rectangle, an ellipse, and a tongue shape, or the projection shape of the fixed valve disc 5 on the tower plate 1 is any one of an arc shape, a circle, a clover shape, a triangle, a rhombus shape, a rectangle, an ellipse, and a tongue shape. The selection can be made according to the specific situation. A fixed valve leg 6 is arranged between adjacent fixed valve discs 5 or on one side of the fixed valve disc 5. In the embodiment, the fixed valve leg 6 is arranged between adjacent fixed valve discs 5, the fixed valve leg 6 is connected to the tower plate 1, and the fixed valve leg 6 is arranged obliquely. The angle between the fixed valve leg 6 and the tower plate 1 is 20°-80°. The number of the fixed valve legs 6 is less than or equal to the number of the fixed valve discs 5. A gap 7 is arranged between the fixed valve disc 5 and the valve hole 2, and between the fixed valve leg 6 and the valve hole 2.

[0043] In this embodiment, Figure 1 , Figure 4As shown, the fixed valve disc 5 is composed of three pieces, and the three fixed valve discs 5 are evenly arranged, that is, the angle between adjacent fixed valve discs 5 is 120°, the fixed valve disc 3 is in an arc shape, and there is a concave arc between adjacent fixed valve discs 3, and the fixed valve legs 6 are in three pieces, and the three fixed valve legs 6 are respectively arranged on the concave arcs between adjacent fixed valve discs 5. Preferably, the radius of the arc of the fixed valve disc 3 is equal to the radius of the concave arc; in this embodiment, the fixed valve disc 5 as a whole is in an arc shape with a convex middle part upward; more preferably, in order to improve the gas-liquid contact on the upper surface of the fixed valve disc 5, serrations 8 are provided at the edge of the fixed valve disc 5.

[0044] Embodiment 2:

[0045] The difference between this embodiment and the first embodiment lies in the installation position of the fixed valve leg 6 and the shape of the fixed valve plate 5. Specifically:

[0046] like Figures 5 to 7 As shown, the fixed valve mounting portion 4 is circular, and three fixed valve discs 5 are arranged on the outer side of the fixed mounting portion 4. The fixed valve discs 5 are tongue-shaped and are evenly arranged, that is, the angle between adjacent fixed valve discs 5 is 120°. A fixed valve leg 6 is arranged on one side of the fixed valve disc 5, and the fixed valve leg 6 is connected to the tower plate 1. In this embodiment, three fixed valve legs 6 are arranged, which are respectively arranged on the outer sides of the three fixed valve discs 5. The fixed valve legs 6 are inclined, and the angle between the fixed valve legs 6 and the tower plate 1 is 20°-80°. The number of fixed valve legs 6 is less than or equal to the number of fixed valve discs 5. In this embodiment, the number of fixed valve legs 6 is equal to the number of fixed valve discs 5. Gaps 7 are arranged between the fixed valve discs 5 and the valve holes 2, and between the fixed valve legs 6 and the valve holes 2.

[0047] More preferably, in order to improve the gas-liquid contact condition on the upper surface of the fixed valve plate 5 , serrations 8 are provided at the edge of the fixed valve plate 5 .

[0048] Embodiment three:

[0049] The difference between this embodiment and the first embodiment lies in the shape of the fixed mounting portion 4, the number of fixed valve plates 5, and the number of fixed valve legs 6. Specifically:

[0050] like Fig. 9As shown, the fixed valve 3 includes a fixed installation part 4, the fixed valve installation part 4 is rectangular or its projection area is rectangular, 12 fixed valve plates 5 are arranged on the outside of the fixed installation part 4, wherein four fixed valve plates 5 are arranged on the two long sides of the rectangle, the four groups of fixed valve plates 5 on the long sides are symmetrical about the central planes of the two groups of long sides of the rectangle, two fixed valve plates 5 are arranged on the two short sides of the rectangle, the two groups of fixed valve plates 5 are symmetrical about the central planes of the short sides of the rectangle, the fixed valve plates 5 are semicircular, fixed valve legs 6 are arranged between adjacent fixed valve plates 5, the fixed valve legs 6 are connected to the tower plate 1, two fixed valve legs 6 are arranged in this embodiment, the two fixed valve legs 6 are symmetrical about the central planes of the two short sides of the rectangle, and the number of fixed valve legs 6 can be adjusted according to specific circumstances, such as Fig.10 As shown, six fixed valve legs 6 are provided, and the six fixed valve legs 6 are symmetrical about the central planes of the two long sides of the rectangle. The fixed valve legs 6 in this embodiment can be provided on the outside of the fixed valve plate 5. The number of the fixed valve legs 6 can be set according to the specific situation, and will not be described in detail here; a gap 7 is provided between the fixed valve plate 5 and the valve hole 2, and between the fixed valve legs 6 and the valve hole 2.

[0051] More preferably, in order to improve the gas-liquid contact condition on the upper surface of the fixed valve plate 5, the edge of the fixed valve plate 5 is provided with saw teeth 8 ( Fig. 9 , Fig.10 not shown).

[0052] Embodiment 4:

[0053] The difference between this embodiment and the first embodiment lies in the shape of the fixed mounting portion 4, the number of fixed valve plates 5, and the number of fixed valve legs 6. Specifically:

[0054] like Fig.11 As shown, the fixed valve 3 includes a fixed mounting portion 4, which is in the shape of a square or its projection is a square, and 12 fixed valve plates 5 are arranged on the outside of the fixed mounting portion 4, and 3 fixed valve plates 5 are arranged on the outside of each side length. Preferably, the fixed valve plates 5 arranged on opposite sides are symmetrical about the central plane of the opposite sides; the fixed valve plates 5 are in the shape of a semicircle, and fixed valve legs 6 are arranged between adjacent fixed valve plates 5, and the fixed valve legs 6 are connected to the tower plate 1. In this embodiment, two fixed valve legs 6 are arranged, and the two fixed valve legs 6 are symmetrically arranged about the hypotenuse plane of the square. The number of fixed valve legs 6 can be adjusted according to specific circumstances, and no specific details are given here; the fixed valve legs 6 in this embodiment can be arranged on the outside of the fixed valve plates 5; gaps 7 are arranged between the fixed valve plates 5 and the valve holes 2, and between the fixed valve legs 6 and the valve holes 2.

[0055] More preferably, in order to improve the gas-liquid contact condition on the upper surface of the fixed valve plate 5, the edge of the fixed valve plate 5 is provided with saw teeth 8 ( Fig.11 not shown).

[0056] In order to better illustrate the advantages of this application, the following experimental data are provided:

[0057] 1. The fixed valve tray in Example 1 of the present invention was experimentally compared with the New-Vst vertical sieve plate tray in the prior art, and the plate pressure drop, mist entrainment, liquid leakage and air humidification efficiency were compared respectively; the experimental results show that: the pressure drop of the fixed valve tray in Example 1 of the present application decreased by an average of 24%; the plate efficiency increased by 25%; the mist entrainment and liquid leakage phenomena were significantly reduced, the upper limit of operation was increased by 25%, and the lower limit was reduced by 20%; the comprehensive operating flexibility of the new large-flux fixed valve tray is 30%-135%.

[0058] 2. In addition, the pressure difference of a new type of tower tray with large flux and uniform gas-liquid distribution in patent application number 2016108669304 in prior art 1 is compared with the fixed valve tower tray in Example 1. The comparison results are as follows: Fig.11 — Fig.14 ; Fig.11 — Fig.14 The F1 float valve in the column refers to a new type of tower tray with large flux and uniform gas-liquid distribution with application number 2016108669304, and the plum blossom solid valve refers to the solid valve tower tray in the first embodiment; more specifically, Fig.11 In the same tower, the tray of Example 1 is on the top, and the tray of prior art 1 is on the bottom, and the liquid volume is 4m 3 Schematic diagram of the pressure difference between the two trays at / h; Fig.12 In the same tower, the tray of the prior art 1 is on the top, and the tray of the embodiment 1 is on the bottom, and the liquid volume is 4m 3 Schematic diagram of the pressure difference between the two trays at / h; Fig.13 In the same tower, the tray of Example 1 is on the top, and the tray of prior art 1 is on the bottom, and the liquid volume is 8m 3 Schematic diagram of the pressure difference between the two trays at / h; Fig.14 In the same tower, the tray of the prior art 1 is on the top, and the tray of the embodiment 1 is on the bottom, and the liquid volume is 8m 3 Schematic diagram of the pressure difference between the two trays at / h;

[0059] according to Fig.11 — Fig.14 It can be clearly seen that the resistance loss of the first embodiment is lower than that of the new tower plate with large flux and uniform gas-liquid distribution having application number 2016108669304, thereby ensuring lower energy consumption.

[0060] The gas of the present application moves from the valve to the end of the fixed valve plate 5, which has a downward secondary film-pulling and breaking mass transfer effect, thereby increasing the gas-liquid contact area; the hydraulic side length is 30-40% higher than that of the traditional floating valve tower plate, the gas-liquid contact is sufficient, and the mass transfer is more uniform; the kinetic energy factor of the gas coming out from the gap between the fixed valve plate 5 and the valve hole 2 and the gap between the fixed valve leg 6 and the valve hole 2 is reduced, so the pressure drop is 15-20% lower than that of the traditional floating valve tower plate; after the gas leaves the tower plate, the vertical momentum is converted into lateral momentum, so the mist entrainment is small; the operating elasticity is between 20% and 130%, the operating elasticity of the traditional floating valve tower plate is 50% to 110%, and the operating elasticity of the present application is greater.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel large-flux fixed valve tower tray, comprising a tower plate (1), wherein the tower plate (1) is provided with a plurality of valve holes (2), wherein fixed valves (3) are installed on the valve holes (2), wherein: The fixed valve (3) comprises a fixed installation portion (4), at least two fixed valve plates (5) are arranged on the outer side of the fixed installation portion (4), a fixed valve leg (6) is arranged between adjacent fixed valve plates (5) or on the side of the fixed valve plate (5) facing away from the fixed installation portion (4), the fixed valve leg (6) is connected to the tower plate (1), the number of the fixed valve legs (6) is less than or equal to the number of the fixed valve plates (5), and a gap (7) is arranged between the fixed valve plate (5) and the valve hole (2) and between the fixed valve leg (6) and the valve hole (2).

2. A novel large flux fixed valve tray according to claim 1, characterized in that: The fixed installation part (4) is in the shape of any one of an arc, a circle, a triangle, a rhombus, a rectangle, an ellipse, a cloverleaf, and a racetrack, or the projection shape of the fixed installation part (4) on the tower plate (1) is in the shape of any one of an arc, a circle, a triangle, a rhombus, a rectangle, an ellipse, a cloverleaf, and a racetrack.

3. A novel large flux fixed valve tray according to claim 1, characterized in that: The fixed valve leg (6) is arranged tilted, and the angle between the fixed valve leg (6) and the tower plate (1) is 20°-80°.

4. A novel large flux fixed valve tray according to claim 1, characterized in that: The fixed valve plate (5) is in any one of the shapes of an arc, a circle, a semicircle, a cloverleaf, a triangle, a rhombus, a rectangle, an ellipse, and a tongue, or the projection shape of the fixed valve plate (5) on the tower plate (1) is in any one of the shapes of an arc, a circle, a semicircle, a cloverleaf, a triangle, a rhombus, a rectangle, an ellipse, and a tongue.

5. A novel large flux fixed valve tray according to claim 1, characterized in that: The fixed valve plates (5) are evenly arranged on the outside of the fixed mounting portion (4).

6. A novel large flux fixed valve tray according to claim 1, characterized in that: The area of ​​the valve hole (2) is larger than the projection area of ​​the fixed valve (3) on the tower plate (1).

7. A novel large flux fixed valve tray according to claim 1, characterized in that: The fixed valve (3) and the tower plate (1) are integrally formed.

8. The novel large flux fixed valve tray according to claim 1, characterized in that: The fixed valve (3) is in the shape of an arc with a middle portion convex upwards.

9. A novel large flux fixed valve tray according to any one of claims 1 to 8, characterized in that: The edge of the fixed valve plate (5) is provided with saw teeth (8).

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