Float valve tower

Abstract

The utility model discloses a float valve tower which comprises a tower shell, a perforated tower plate, a multi-layer float valve, a downcomer plate, a liquid inlet, a gas outlet, a gas inlet and a liquid outlet, the plurality of perforated tower plates are fixed on the inner wall of the tower shell in a layer form; the plurality of downcomer plates are vertically fixed on the inner wall of the tower shell in a layer form; each perforated tower plate is connected and matched with the corresponding downcomer plate to form a downcomer; a plurality of tower plate holes are formed in the perforated tower plate, and a multi-layer floating valve is mounted on each tower plate hole in a sliding manner; a liquid inlet, a gas outlet, a gas inlet and a liquid outlet are formed in the tower shell; the multi-layer floating valve is formed by connecting at least two layers of floating valve modules in a layer mode. Each layer of floating valve module is composed of at least one floating valve unit located on the same layer. In each floating valve unit, the upper parts of a plurality of valve legs are fixed on the side wall of the valve cover along the circumferential direction of the valve cover; apart from the floating valve unit in the uppermost floating valve module, valve covers of the other floating valve units are all provided with air rising holes.

Description

Technical Field

[0001] The utility model relates to gas-liquid contact mass transfer equipment in the chemical industry, in particular to a floating valve tower. Background Art

[0002] Tower equipment is one of the important production equipment in the fields of oil refining, petrochemicals, fine chemicals, environmental protection, etc. Among them, the floating valve tower is extremely important in the entire chemical industry tower equipment. It has the advantages of small entrainment of mist and foam and is not easy to leak. The tower structure of the commonly used floating valve tower is roughly the same. Different floating valve forms are mainly used in various working conditions. The more commonly used floating valves are circular floating valves and strip floating valves. With the development of the chemical industry, various forms of floating valves have emerged, such as guide floating valves, ADV differential floating valves, trapezoidal floating valves, etc., which are applied to various floating valve towers and show excellent performance under specific working conditions. However, with the development trend of enterprises to increase efficiency, expand capacity, save energy, and reduce consumption, under the requirements of greater operational flexibility, these floating valve towers have more or less the following problems:

[0003] 1. The working principle of the float valve makes it open partially in the whole plate area under the condition of small gas volume, and the mass transfer area is relatively concentrated, which causes uneven mass transfer in the whole floating valve tower and extremely low production efficiency;

[0004] 2. Under normal production conditions, that is, when the gas volume is appropriate, after the valve body is fully opened, whether it is a circular float valve, a strip float valve or a guide float valve, the gas is ejected horizontally from the bottom of the valve body, or ejected directionally along the guide hole, and there are a large number of mass transfer dead zones.

[0005] 3. Under the condition of excessive gas volume, after the float valve is opened, the gas channel is limited, resulting in excessive gas velocity, serious impact phenomenon of adjacent valve bodies, causing mist entrainment and even dry plate phenomenon, affecting production efficiency. Utility Model Content

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a floating valve tower.

[0007] The utility model solves the technical problem by providing a floating valve tower, characterized in that the floating valve tower comprises a tower shell, a perforated tower plate, a multi-layer floating valve, a downcomer plate, a liquid inlet, a gas outlet, a gas inlet and a liquid outlet;

[0008] A plurality of perforated tower plates are fixed on the inner wall of the tower shell in the form of layers; a plurality of downcomers are vertically fixed on the inner wall of the tower shell in the form of layers; each perforated tower plate is connected and matched with its own downcomer to form a downcomer; a plurality of tower plate holes are arranged on the perforated tower plate, and a multi-layer float valve is slidably mounted on each tower plate hole; a liquid inlet, a gas outlet, a gas inlet and a liquid outlet are arranged on the tower shell;

[0009] The multi-layer float valve is composed of at least two layers of float valve modules connected in layers; each layer of the float valve module is composed of at least one float valve unit located in the same layer;

[0010] Each float valve unit is composed of a plurality of valve legs and a valve cover; in each float valve unit, the upper parts of the plurality of valve legs are fixed on the side wall of the valve cover along the circumference of the valve cover; except for the float valve unit in the uppermost float valve module, the valve covers of the other float valve units are all provided with air lifting holes; the lower parts of the plurality of valve legs of each float valve unit in the float valve module of this layer are fixed on the corresponding air lifting holes of the valve cover of the float valve unit in the float valve module of the next layer; the valve cover of each float valve unit in the float valve module of this layer matches the shape of the corresponding air lifting holes of the float valve unit in the float valve module of the next layer and corresponds in position; the lower parts of the plurality of valve legs of each float valve unit in the lowermost float valve module are slidably installed on the tower plate holes of the perforated tower plate, and can be raised and lowered along the tower plate holes to form a multi-layer float valve.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] (1) The floating valve used in the floating valve tower of the utility model is a multi-layer floating valve structure. An air riser hole is arranged on the valve cover, and a valve cover is arranged on the air riser hole to form a "valve on valve" form, which significantly increases the gas channel. When the operating gas volume is very small, bubbles are generated through the air riser hole. When the operating gas volume is too large, the gas velocity is reduced, the entrainment of mist and foam is reduced, and the operating flexibility of the floating valve tower is improved.

[0013] (2) The multi-layer float valve of the utility model has multiple layers of air-lifting holes, which can significantly increase the opening rate of the float valve tower plate, improve the anti-clogging performance, and extend the service life of the float valve tower.

[0014] (3) When the gas volume is small, the valve body is closed, and the gas passes through the gas riser holes on the multi-layer float valve, bubbling and mass transfer in the liquid layer, thereby improving the production efficiency of the lower limit of the floating valve tower operation.

[0015] (4) Under normal production conditions, the valve body is fully opened, and the gas is freely distributed from the multiple gas-raising holes of the multi-layer float valve and evenly emerges, increasing the uniformity of gas entering the liquid phase and eliminating mass transfer dead zones.

[0016] (5) Under excessive gas volume conditions, the structure of the multi-layer float valve module can significantly reduce the gas velocity passing through the valve body, reduce the impact of adjacent valve bodies, reduce mist entrainment, improve production efficiency, and increase the operating flexibility of the entire tower by more than 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2It is a front view schematic diagram of a multi-layer float valve of Example 1 of the utility model;

[0019] Figure 3 It is a top view schematic diagram of a layer of valve cover of the multi-layer float valve of Example 1 of the utility model;

[0020] Figure 4 It is a front view schematic diagram of a multi-layer float valve of Example 2 of the utility model;

[0021] Figure 5 It is a top view schematic diagram of a layer of valve cover of the multi-layer float valve of Example 2 of the utility model;

[0022] Figure 6 It is a front view schematic diagram of a multi-layer float valve of Example 3 of the utility model;

[0023] Figure 7 It is a top view schematic diagram of a valve cover of a multi-layer float valve of the utility model embodiment 3;

[0024] Figure 8 It is a top view schematic diagram of the second-layer valve cover of the multi-layer float valve of Example 3 of the utility model.

[0025] In the figure, there are a tower shell 1, a perforated tower plate 2, a multi-layer float valve 3, a first-layer valve leg 31, a first-layer valve cover 32, a first-layer gas rising hole 33, a second-layer valve cover 34, a second-layer valve leg 35, a second-layer gas rising hole 36, a third-layer valve cover 37, a third-layer valve leg 38, a downcomer 4, a liquid inlet 5, a gas outlet 6, a gas inlet 7, and a liquid outlet 8. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are given below. The specific embodiments are only used to further illustrate the present invention in detail and do not limit the protection scope of the claims of the present invention.

[0027] The utility model provides a floating valve tower, characterized in that the floating valve tower comprises a tower shell 1, a perforated tower plate 2, a multi-layer floating valve 3, a downcomer plate 4, a liquid inlet 5, a gas outlet 6, a gas inlet 7 and a liquid outlet 8;

[0028] A plurality of perforated trays 2 are welded and fixed on the inner wall of the tower shell 1 in the form of layers; a plurality of downcomers 4 are vertically fixed on the inner wall of the tower shell 1 in the form of layers; each perforated tray 2 is connected and matched with its own downcomer 4 to form a downcomer; a plurality of tray holes are arranged on the perforated tray 2, and a multi-layer float valve 3 is slidably mounted on each tray hole; a liquid inlet 5, a gas outlet 6, a gas inlet 7 and a liquid outlet 8 are arranged on the tower shell;

[0029] The multi-layer float valve 3 is composed of at least two layers (preferably 2 to 5 layers) of float valve modules connected in layers; each layer of the float valve module is composed of at least one float valve unit located in the same layer;

[0030] Each float valve unit is composed of a plurality of valve legs and a valve cover; in each float valve unit, the upper parts of the plurality of valve legs are evenly fixed on the side wall of the valve cover along the circumference of the valve cover; except for the float valve unit in the uppermost float valve module, the valve covers of the remaining float valve units are all provided with air lifting holes; the lower parts of the plurality of valve legs of each float valve unit in the float valve module of this layer are fixed to the corresponding air lifting holes of the valve cover of the float valve unit in the float valve module of the next layer; the valve cover of each float valve unit in the float valve module of this layer matches the shape of the corresponding air lifting holes of the float valve unit in the float valve module of the next layer and corresponds in position; the lower parts of the plurality of valve legs of each float valve unit in the lowermost float valve module are slidably mounted on the tower plate holes of the perforated tower plate 2, and can be raised and lowered along the tower plate holes to form a multi-layer float valve.

[0031] Preferably, the liquid inlet 5 is arranged on the side wall of the tower shell 1, corresponding to the position of the perforated tower plate 2 of one layer; the gas outlet 6 is arranged at the top of the tower shell 1; the gas inlet 7 is arranged at the lower part of the tower shell 1, below the perforated tower plate 2 of the lowest layer; and the liquid outlet 8 is arranged at the bottom of the tower shell 1.

[0032] Preferably, each valve cover is provided with a plurality of air lifting holes; the plurality of air lifting holes are randomly arranged (preferably evenly arranged) and have random shapes on the valve cover.

[0033] Preferably, the total area of ​​the air lifting holes on each valve cover accounts for 5% to 95% of the area of ​​the valve cover.

[0034] Preferably, the area of ​​each valve cover in the floating valve module of the current layer is not less than the area of ​​each air lifting hole in the floating valve module of the next layer.

[0035] Example 1

[0036] The multi-layer float valve of this embodiment is composed of two layers of float valve modules connected in layers (such as Figure 2 and Figure 3 Each layer of the floating valve module is composed of a floating valve unit; the multi-layer floating valve includes a layer of valve legs 31, a layer of valve cover 32, a layer of air riser holes 33, a second layer of valve cover 34 and a second layer of valve legs 35;

[0037] The upper parts of the three first-layer valve legs 31 are evenly fixed on the side wall of the first-layer valve cover 32 along the circumference of the first-layer valve cover 32, and the lower parts are slidably installed at the plate holes of the perforated plate 2, and can be lifted up and down along the plate holes; the first-layer valve cover 32 is provided with a first-layer gas lifting hole 33; the first-layer gas lifting hole 33 is circular, located at the center of the first-layer valve cover 32, and occupies 11% of the area of ​​the first-layer valve cover 32;

[0038] The upper parts of the three second-layer valve legs 35 are evenly fixed on the side walls of the second-layer valve cover 34 along the circumference of the second-layer valve cover 34, and the lower parts are fixed to the first-layer air riser hole 33 of the first-layer valve cover 32; the second-layer valve cover 34 is located directly above the first-layer air riser hole 33, and the two are separated by a certain distance; the shape of the second-layer valve cover 34 matches the shape of the first-layer air riser hole 33 (both are circular) and the positions correspond, and the area of ​​the second-layer valve cover 34 is equal to the area of ​​the first-layer air riser hole 33.

[0039] Example 2

[0040] The float valve of this embodiment is composed of two layers of float valve modules connected in layers (such as Figure 4 and Figure 5 As shown); the first layer (i.e. the bottom layer) of the floating valve module is composed of one floating valve unit, and the second layer of the floating valve module is composed of four floating valve units; the multi-layer floating valve includes a first layer of valve legs 31, a first layer of valve cover 32, a first layer of air lifting holes 33, a second layer of valve cover 34 and a second layer of valve legs 35;

[0041] The upper parts of the three first-layer valve legs 31 are evenly fixed on the side wall of the first-layer valve cover 32 along the circumference of the first-layer valve cover 32, and the lower parts are slidably installed at the plate holes of the perforated plate 2, and can be lifted up and down along the plate holes; the first-layer valve cover 32 is evenly provided with four first-layer air riser holes 33; each first-layer air riser hole 33 is a fan-shaped one with an angle of 90°, and the total area of ​​the first-layer air riser holes 33 accounts for 90% of the area of ​​the first-layer valve cover 32;

[0042] In each float valve unit of the two-layer float valve module, the upper parts of the three second-layer valve legs 35 are evenly fixed on the side wall of the second-layer valve cover 34 along the circumference of the second-layer valve cover 34 (specifically: the upper part of one second-layer valve leg 35 is fixed on the arc of the fan, and the upper parts of the other two second-layer valve legs 35 are respectively fixed on their respective radii), and the lower part is fixed to a corresponding first-layer air riser hole 33 in the first-layer valve cover 32; each second-layer valve cover 34 is located directly above its corresponding first-layer air riser hole 33, and the two are separated by a certain distance; the shape of the second-layer valve cover 34 matches the shape of the first-layer air riser hole 33 (both are fan-shaped with an angular arc of 90°) and the positions correspond, and the area of ​​each second-layer valve cover 34 is equal to the area of ​​each first-layer air riser hole 33.

[0043] Example 3

[0044] The float valve of this embodiment is composed of three layers of float valve modules connected in layers (such as Figure 6-8 Each layer of the floating valve module is composed of a floating valve unit; the multi-layer floating valve includes a layer of valve legs 31, a layer of valve cover 32, a layer of air rise hole 33, a second layer of valve cover 34, a second layer of valve legs 35, a second layer of air rise hole 36, a third layer of valve cover 37 and a third layer of valve legs 38;

[0045] The upper parts of the three first-layer valve legs 31 are evenly fixed on the side wall of the first-layer valve cover 32 along the circumference of the first-layer valve cover 32, and the lower parts are slidably installed at the plate holes of the perforated plate 2, and can be lifted up and down along the plate holes; the first-layer valve cover 32 is provided with a first-layer gas lifting hole 33; the first-layer gas lifting hole 33 is circular, located at the center of the first-layer valve cover 32, and occupies 30% of the area of ​​the first-layer valve cover 32;

[0046] The upper parts of the three second-layer valve legs 35 are evenly fixed on the side wall of the second-layer valve cover 34 along the circumference of the second-layer valve cover 34, and the lower parts are fixed on the first-layer air lifting hole 33 of the first-layer valve cover 32; the second-layer valve cover 34 is located directly above the first-layer air lifting hole 33, and the two are separated by a certain distance; the shape of the second-layer valve cover 34 matches the shape of the first-layer air lifting hole 33 (both are circular) and the positions correspond, and the area of ​​the second-layer valve cover 34 is slightly larger than the area of ​​the first-layer air lifting hole 33; a second-layer air lifting hole 36 is opened on the second-layer valve cover 34; the second-layer air lifting hole 36 is circular, located at the center of the second-layer valve cover 34, and occupies 25% of the area of ​​the second-layer valve cover 34;

[0047] The upper parts of the three three-layer valve legs 38 are evenly fixed on the side walls of the three-layer valve cover 37 along the circumference of the three-layer valve cover 37, and the lower parts are fixed to the second-layer air riser hole 36 of the second-layer valve cover 34; the three-layer valve cover 37 is located directly above the second-layer air riser hole 36, and the two are separated by a certain distance; the shape of the three-layer valve cover 37 matches the shape of the second-layer air riser hole 36 (both are circular) and the positions correspond, and the area of ​​the three-layer valve cover 37 is equal to the area of ​​the second-layer air riser hole 36.

[0048] The working principle and workflow of the utility model are:

[0049] The gas enters the tower shell 1 from the gas inlet 7, passes through the multi-layer float valve 3 from bottom to top, contacts and transfers mass with the liquid on the perforated tower plate 2, continues to rise and passes through several layers of perforated tower plates 2, and is discharged from the gas outlet 6; the liquid enters the tower shell 1 from the liquid inlet 5, falls on the perforated tower plate 2, flows horizontally through the multi-layer float valve 3, contacts and transfers mass with the gas, falls along the downcomer 4 to the perforated tower plate 2 of the next layer, and is discharged from the liquid outlet 8 after passing through several layers of perforated tower plates 2.

[0050] The specific working principle and working process of the multi-layer float valve 3 are as follows: take a three-layer float valve module as an example.

[0051] When the gas volume is at a minimum, the valve body is not opened. Due to the effect of the liquid pressure, the gas first emerges from the second-layer gas riser hole 36, and is blocked by the third-layer valve cover 37. The gas emerges along the circumferential direction of the lower edge of the third-layer valve cover 37, contacts the liquid in the form of bubbles, and participates in mass transfer.

[0052] Increase the gas volume. When the gas volume is small, the valve body still does not open. A part of the gas emerges from the first-layer gas riser hole 33 and emerges circumferentially along the lower edge of the second-layer valve cover 34. Another part of the gas emerges from the second-layer gas riser hole 36 and emerges circumferentially along the lower edge of the third-layer valve cover 37. It contacts the liquid in the form of bubbles and participates in mass transfer.

[0053] The gas volume continues to increase. When the gas volume is appropriate, the valve body opens, and part of the gas emerges from the lower edge of the first-layer valve cover 32 in the circumferential direction, and part of the gas emerges from the lower edge of the second-layer valve cover 34 through the first-layer gas riser hole 33. Another part of the gas emerges from the second-layer gas riser hole 36 and emerges from the lower edge of the third-layer valve cover 37 in the circumferential direction, and contacts the liquid in the form of bubbles to participate in mass transfer.

[0054] As the gas volume increases, the gas-liquid contact form changes from a bubbling state to a jet state; when the gas volume is too large, all the float valves are opened, and the gas volumes emitted from the first-layer valve cover 32, the second-layer valve cover 34 and the third-layer valve cover 37 are distributed by themselves, and the phenomenon of mist entrainment caused by excessive local gas velocity will not occur.

[0055] Anything not described in the present invention is applicable to the prior art.

Claims

1. A floating valve tower, characterized in that: The floating valve tower comprises a tower shell (1), a perforated tower plate (2), a multi-layer floating valve (3), a downcomer plate (4), a liquid inlet (5), a gas outlet (6), a gas inlet (7) and a liquid outlet (8); A plurality of perforated tower plates (2) are fixed on the inner wall of a tower shell (1) in the form of layers; a plurality of downcomers (4) are fixed vertically on the inner wall of the tower shell (1) in the form of layers; each perforated tower plate (2) is connected and matched with its own downcomer (4) to form a downcomer; a plurality of tower plate holes are arranged on the perforated tower plate (2), and a multi-layer float valve (3) is slidably mounted on each tower plate hole; a liquid inlet (5), a gas outlet (6), a gas inlet (7) and a liquid outlet (8) are arranged on the tower shell; The multi-layer float valve (3) is composed of at least two layers of float valve modules connected in layers; each layer of the float valve module is composed of at least one float valve unit located in the same layer; Each float valve unit is composed of a plurality of valve legs and a valve cover; in each float valve unit, the upper parts of the plurality of valve legs are fixed on the side wall of the valve cover along the circumference of the valve cover; except for the float valve unit in the uppermost float valve module, the valve covers of the remaining float valve units are all provided with air lifting holes; the lower parts of the plurality of valve legs of each float valve unit in the current float valve module are fixed to the corresponding air lifting holes of the valve cover of the float valve unit in the next float valve module; the valve cover of each float valve unit in the current float valve module matches the shape of the corresponding air lifting holes of the float valve unit in the next float valve module and corresponds in position; the lower parts of the plurality of valve legs of each float valve unit in the lowest float valve module are slidably mounted on the tower plate holes of the perforated tower plate (2) and can be raised and lowered along the tower plate holes to form a multi-layer float valve.

2. The floating valve tower according to claim 1, characterized in that: The float valve is composed of 2 to 5 layers of float valve modules connected in layers.

3. The floating valve tower according to claim 1, characterized in that: In each float valve unit, the upper parts of a plurality of valve legs are evenly fixed on the side wall of the valve cover along the circumference of the valve cover.

4. The floating valve tower according to claim 1, characterized in that: Each valve cover is provided with a plurality of air raising holes; the plurality of air raising holes are randomly arranged and arbitrarily shaped on the valve cover.

5. The floating valve tower according to claim 1, characterized in that: The total area of ​​the air lifting holes on each valve cover accounts for 5% to 95% of the area of ​​the valve cover.

6. The floating valve tower according to claim 1, characterized in that: The area of ​​each valve cover in the floating valve module of the current layer is not less than the area of ​​each air lifting hole in the floating valve module of the next layer.

7. The floating valve tower according to claim 1, characterized in that: A liquid inlet (5) is arranged on the side wall of the tower shell (1), corresponding to the position of a perforated tower plate (2) in one layer; a gas outlet (6) is arranged on the top of the tower shell (1); a gas inlet (7) is arranged on the lower part of the tower shell (1), below the perforated tower plate (2) in the lowest layer; and a liquid outlet (8) is arranged on the bottom of the tower shell (1).

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