Float valve and tower plate for distilling waste mineral oil

Abstract

The utility model discloses a float valve and a tower plate for distilling waste mineral oil, which comprise a valve plate, valve legs and supporting legs, the supporting legs are arranged at four corners of the valve plate, the supporting legs are bent downwards, the valve legs are arranged on two sides along the length direction of the valve plate, the front valve leg is arranged on the lower portion of the front valve leg, the rear valve leg is provided with the rear valve leg, and a group of first guide holes are arranged on the valve plate along the length direction. The distillation tower has the beneficial effects that the overall aperture ratio is improved, so that the overall working efficiency of the distillation tower can be improved, meanwhile, the entrainment phenomenon can be reduced, the full contact of gas and liquid is ensured, and the quality of the distillation tower is improved. Meanwhile, the trapezoid floating valves are arranged in the arch-shaped areas on the two sides of the tower tray, the strip-shaped floating valves are arranged in the middle of the tower tray, and the trapezoid floating valves can effectively reduce resistance to liquid and can effectively prevent liquid stagnation and backmixing.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation, in particular to a floating valve and a tower plate for distilling waste mineral oil. Background Art

[0002] The general structure of a floating valve tower plate is that many holes are opened on the tower plate with a downcomer as air flow channels, and a valve plate that can float up and down is provided above the holes. The rising air flow passes through the valve plate and contacts the liquid phase flowing across the tower plate to carry out mass transfer.

[0003] Waste mineral oil is a general term for used mineral oil. Generally, in the process of recycling and reusing waste mineral oil, the treated waste minerals are put into a distillation tower for distillation, which can effectively separate the usable components from the impurity components in the waste mineral oil. The usable components can be recycled and processed for use, which is more green and environmentally friendly.

[0004] Generally, the floating valves of distillation towers are divided into fixed floating valves and floating floating valves. The most commonly used floating floating valve is the F-1 type floating valve. The valve plate is circular with valve legs around it. The lower steam lifts the valve plate through the valve hole, and the steam on both sides sprays out to contact the upper liquid for mass transfer and heat transfer. During the up and down floating process of the F-1 type floating valve, due to its own shape limitation, the floating valve will rotate, and the rotation process will increase the wear of the valve legs and the tower plate, which will shorten the service life of the floating valve. At the same time, the rotation will also cause the airflow direction to change, which will also cause the flow direction of the upper liquid to be relative to the direction of the valve plate air port, which will easily cause fog and foam, which is not conducive to the normal progress of the heat transfer process. Utility Model Content

[0005] (I) Technical solution

[0006] In order to solve the above technical problems, the utility model provides a floating valve and a tower plate for a waste mineral oil distillation tower.

[0007] The specific technical solutions are:

[0008] A floating valve for waste mineral oil distillation, the floating valve is integrally stamped and formed, including a valve plate, a valve leg and a support foot, the support feet are arranged at the four corners of the valve plate, the support feet are bent downward, the valve legs are arranged on both sides along the length direction of the valve plate, and are divided into a front valve leg and a rear valve leg, the front valve leg is arranged at the lower part of the front valve leg, and the rear valve leg is arranged at the rear valve foot, a group of first guide holes are arranged on the valve plate along the length direction, a group of the first guide holes is provided with a guide plate, a group of the guide plates have opposite opening directions and face the outside of the valve plate, a group of second guide holes are also arranged on the valve plate, the second guide hole is located in the middle of a group of the first guide holes, and the second guide hole is "U"-shaped, a group of arc-shaped plates and arc-shaped covers are correspondingly arranged on the second guide hole, a group of the arc-shaped plates and the arc-shaped covers correspond to the shape of the second guide holes, and a group of the arc-shaped plates have opposite opening directions, and the arc-shaped covers are arranged near one end of the front valve leg.

[0009] Furthermore, a height difference H1 between the front valve foot and the support foot is 15-25 mm, a height difference H2 between the rear valve foot and the support foot is 30-60 mm, and H1<H2, and a height difference H3 between the guide plate and the valve plate is 1-5 mm.

[0010] Furthermore, the front valve foot is formed by bending the front valve leg along the length direction of the valve plate, and the rear valve foot is arranged at the bottom of the rear valve leg and extends along the width direction of the valve plate.

[0011] Furthermore, a leg hole is provided on the rear valve leg and is arranged near one end of the rear valve foot.

[0012] Furthermore, the width between the two supporting feet close to one end of the front valve leg is W1, the width between the two supporting feet close to one end of the rear valve leg is W2, and W1≤W2.

[0013] A tower plate comprises a float valve and a tower plate, wherein a liquid receiving plate and a liquid downcomer are arranged on the tower plate, a plurality of valve holes are arranged on the tower plate, and the float valve is arranged on the valve hole; an inlet weir and an outlet weir are arranged on both sides of the tower plate, and a liquid downcomer is arranged on the side close to the outlet weir.

[0014] Furthermore, the height of the liquid receiving plate is lower than the height of the tower plate, the lower part of the downcomer is inclined, the arched cross-sectional area formed by the upper part of the downcomer and the tower wall is S1, the arched cross-sectional area formed by the lower part of the downcomer and the tower wall is S2, and S1:S2 is 1:0.55-0.6.

[0015] Furthermore, the tower tray includes arched portions on both sides and a trapezoidal portion in the middle, the float valve W1 located in the arched portion is less than W2, and the float valve W1 in the trapezoidal portion is equal to W2.

[0016] (II) Beneficial effects

[0017] Compared with the prior art, the structure of the float valve is improved and the overall opening rate is increased, so that the overall working efficiency of the distillation tower can be improved. At the same time, the strip-shaped float valve will not rotate, and the opening direction of the pores is perpendicular to the direction of liquid flow. On the one hand, the mist phenomenon can be reduced, and on the other hand, the gas and liquid can be fully in contact to ensure working efficiency. At the same time, trapezoidal float valves are arranged in the arched areas on both sides of the tower plate, and a strip float valve is arranged in the middle. The trapezoidal float valve can effectively reduce the resistance to the liquid and effectively prevent liquid stagnation and backmixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 Schematic diagram of the floating valve structure;

[0020] Figure 2 It is the front view of the float valve structure;

[0021] Figure 3 It is a top view of the float valve;

[0022] Figure 4 It is a top view of the trapezoidal float valve;

[0023] Figure 5 A schematic diagram of the use of tower plates;

[0024] Figure 6 This is a schematic diagram of the float valve arrangement;

[0025] In the figure: 1-valve plate, 2-support foot, 3-front valve leg, 4-rear valve leg, 5-front valve foot, 6-rear valve foot, 7-first guide hole, 8-guide plate, 9-second guide hole, 10-arc plate, 11-arc cover, 12-leg hole, 13-tower plate, 14-liquid receiving plate, 15-downcomer, 16-inlet weir, 17-outlet weir. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. The described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Among the related prior arts, the most commonly used floating valve is the F-1 type float valve, in which the valve plate is circular and has valve legs around it. The lower steam lifts the valve plate through the valve hole, and the steam on both sides is ejected to contact the upper liquid for mass transfer and heat transfer. During the up and down floating process of the F-1 type float valve, due to the limitation of its own shape, the float valve will rotate, and the rotation process will increase the wear of the valve legs and the tower plate, which will shorten the service life of the float valve. At the same time, the rotation will also cause the airflow direction to change, which will also cause the flow direction of the upper liquid to be relative to the direction of the valve plate air port, which will easily cause fog and foam, which is not conducive to the normal progress of the heat transfer process.

[0028] In order to solve the problems existing in the related prior art, the utility model proposes a floating valve and a tower plate for waste mineral oil distillation. The principle and structure of the utility model are described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] See also Figures 1 to 4 The utility model provides a floating valve for waste mineral oil distillation, which is integrally stamped and formed, including a valve plate 1, a valve leg and a support foot 2. The four corners of the valve plate 1 are provided with support feet 2, which are bent downward. The valve plate is rectangular as a whole, and valve legs are provided on both sides along the length direction of the valve plate 1, which are divided into a front valve leg 3 and a rear valve leg 4. The lower part of the front valve leg 3 is provided with a front valve foot 5, and the rear valve leg 4 is provided with a rear valve foot 6. A group of first guide holes 7 are provided on the valve plate 1 along the length direction, and a group of first guide holes 7 are provided with a guide plate 8. The guide plate 8 covers the first guide hole 7 to form an airflow injection hole, and a group of guide plates 8 have opposite opening directions and face the outside of the valve plate 1. That is, when the float valve is working, the injection hole formed by the first guide hole 7 and the guide plate 8 sprays steam, and the injection direction is toward the two sides of the float valve. A group of second guide holes 9 is also provided on the valve plate 1. The second guide hole 9 is located in the middle of a group of first guide holes 7, and the second guide hole 9 is "U"-shaped. A group of arcuate plates 10 and arcuate covers 11 are correspondingly provided on the second guide hole 9. A group of arcuate plates 10 and arcuate covers 11 correspond to the second guide holes 9. The arcuate plates 10 correspond to the arcuate part of the second guide hole 9, and the arcuate covers 11 correspond to the straight part of the second guide hole. The opening directions of a group of arcuate plates 10 are opposite, and the arcuate covers 11 are arranged near one end of the front valve leg 3.

[0030] Specifically, the height difference H1 between the front valve foot 5 and the support foot 2 is 15-25 mm, the height difference H2 between the rear valve foot 6 and the support foot 2 is 30-60 mm, and H1<H2, and the height difference H3 between the guide plate 8 and the valve plate 1 is 1-5 mm.

[0031] The front valve foot 5 is formed by bending the front valve leg 3 along the length direction of the valve plate 1. The rear valve foot 6 is arranged at the bottom of the rear valve leg 4 and extends along the width direction of the valve plate 1. This structure is easy to process and is formed by integral stamping and then bending.

[0032] Please continue reading Figure 1A leg hole 12 is provided on the rear valve leg 4 and is located near one end of the rear valve foot 6. This can effectively reduce the overall mass of the float valve, because excessive mass of the float valve will lead to difficulty in lifting. At the same time, the leg hole 12 is located low, so when the steam flow at the bottom is large and the float valve is lifted to the highest state, the leg hole 12 can spray steam to relieve the excessive atmospheric pressure at the bottom.

[0033] See also Figure 3 and Figure 4 , the width between the two legs near the front valve leg 3 is W1, the width between the two legs near the rear valve leg 4 is W2, and W1≤W2. Specifically, when W1=W2, the valve plate 1 is rectangular as a whole, and when W1<W2, the valve plate 1 is Figure 4 As shown, the whole is in a trapezoidal shape, and the front valve leg 3 at the front of the trapezoidal shape can be smaller, so the resistance to the liquid on the upper part of the tower plate will also be smaller.

[0034] See also Figure 5 Based on the same inventive concept, the utility model also proposes a tower plate, including the above-mentioned float valve, and also including a tower plate 13, on which a liquid receiving plate 14 and a downcomer 15 are provided, a plurality of valve holes are provided on the tower plate 13, and a float valve is provided on the valve hole, and an inlet weir 16 and an outlet weir 17 are respectively provided on both sides of the tower plate 13, and a downcomer 15 is also provided on the side close to the outlet weir 17, wherein Figure 5 The direction of liquid flow.

[0035] Specifically, the height of the liquid receiving plate 14 is lower than the height of the tower plate 13, the lower part of the downcomer 15 is inclined, the arched cross-sectional area formed by the upper part of the downcomer 15 and the tower wall is S1, the arched cross-sectional area formed by the lower part of the downcomer 15 and the tower wall is S2, and S1:S2 is 1:0.55-0.6. In this way, the area of ​​the lower liquid receiving plate 14 can be reduced, the effective area on the tower plate 13 can be increased, more float valves can be arranged, and work efficiency can be improved.

[0036] It is also possible to arrange two types of float valves on the same tray, see Figure 6 The tower plate includes arched parts on both sides and a trapezoidal part in the middle. The float valve W1 located in the arched part is less than W2, and the float valve W1 in the trapezoidal part is equal to W2. That is, the trapezoidal float valve is arranged at the position of the arched part, and the rectangular float valve is installed at the position of the trapezoidal part. This is because when the liquid flows from the inlet weir to the outlet weir on the tower plate, the flow cross-section increases continuously, which will cause stagnation at the arched positions on both sides. By using the trapezoidal float valve, the front valve leg 3 at the front end can be smaller, and the resistance to the fluid will also be smaller, which can effectively alleviate the stagnation phenomenon.

[0037] The specific working principle is as follows: liquid enters the distillation tower, and the liquid part is first stored on the tower plate 13. As waste oil is continuously added, the liquid level is higher than the outlet weir 17, and the waste oil will flow from the downcomer 15 to the next layer of the receiving plate 14, and then the liquid level on the receiving plate 14 continues to rise. When the liquid level is higher than the inlet weir 16, the liquid enters the tower plate 13 of the next layer, that is, the liquid flows from the inlet weir to the outlet weir, and then flows from the downcomer 15 to the next layer, and the vaporized part is lifted up by the hole on the tower plate 13, and sprayed out from the first guide hole 7 and the second guide hole 9 on the float valve, and then the gas During the spraying, the liquid on the corresponding tray 13 interacts with each other for mass and heat transfer. The utility model cooperates with the first guide hole 7 and the second guide hole 9 to improve the overall opening rate, so that the overall working efficiency of the distillation tower can be improved. At the same time, the strip-shaped float valve will not rotate, and the opening direction of the pores is perpendicular to the liquid flow direction. On the one hand, it can reduce the mist phenomenon, and on the other hand, it can ensure that the gas and liquid are in full contact, thereby ensuring working efficiency. At the same time, trapezoidal float valves are arranged in the arched areas on both sides of the tray, and a strip float valve is arranged in the middle. The trapezoidal float valve can effectively reduce the resistance to the liquid and effectively prevent liquid stagnation and backmixing.

[0038] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A float valve for waste mineral oil distillation, Features: The float valve is integrally stamped and comprises a valve plate (1), a valve leg and a support foot (2). The support feet (2) are arranged at the four corners of the valve plate (1). The support feet (2) are bent downward. Valve legs are arranged on both sides along the length direction of the valve plate (1), and are divided into a front valve leg (3) and a rear valve leg (4). A front valve foot (5) is arranged at the lower part of the front valve leg (3), and a rear valve foot (6) is arranged at the rear valve leg (4). A group of first guide holes (7) are arranged on the valve plate (1) along the length direction. A group of guide plates (8) are arranged on the first guide holes (7). A group of guide plates (8) are opened. The opening direction of the first guide hole (7) is opposite to that of the first guide hole (7) and is toward the outside of the valve plate (1). The valve plate (1) is also provided with a group of second guide holes (9). The second guide holes (9) are located in the middle of the group of first guide holes (7). The second guide holes (9) are "U"-shaped. A group of arc-shaped plates (10) and arc-shaped covers (11) are correspondingly provided on the second guide holes (9). The group of arc-shaped plates (10) and the arc-shaped covers (11) correspond to the second guide holes (9). The opening directions of the group of arc-shaped plates (10) are opposite to each other. The arc-shaped covers (11) are provided near one end of the front valve leg (3).

2. A float valve for waste mineral oil distillation according to claim 1, Features: The height difference H1 between the front valve foot (5) and the support foot (2) is 15-25 mm, the height difference H2 between the rear valve foot (6) and the support foot (2) is 30-60 mm, and H1<H2, and the height difference H3 between the guide plate (8) and the valve plate (1) is 1-5 mm.

3. A float valve for waste mineral oil distillation according to claim 1, Features: The front valve foot (5) is formed by bending the front valve leg (3) along the length direction of the valve plate (1), and the rear valve foot (6) is arranged at the bottom of the rear valve leg (4) and extends along the width direction of the valve plate (1).

4. A float valve for waste mineral oil distillation according to claim 1, Features: The rear valve leg (4) is provided with a leg hole (12), and is arranged near one end of the rear valve foot (6).

5. A float valve for waste mineral oil distillation according to claim 1, Features: The width between the two supporting feet close to one end of the front valve leg (3) is W1, the width between the two supporting feet close to one end of the rear valve leg (4) is W2, and W1≤W2.

6. A tray, Features: It comprises a float valve as described in any one of claims 1 to 5, and also comprises a tower plate (13), the tower plate (13) is provided with a liquid receiving plate (14) and a downcomer (15), the tower plate (13) is provided with a plurality of valve holes, the float valve is provided on the valve holes, an inlet weir (16) and an outlet weir (17) are respectively provided on both sides of the tower plate (13), and the downcomer (15) is also provided on the side close to the outlet weir (17).

7. A tray according to claim 6, Features: The height of the liquid receiving plate (14) is lower than that of the tower plate (13); the lower portion of the downcomer (15) is inclined; the arcuate cross-sectional area formed by the upper portion of the downcomer (15) and the tower wall is S1; the arcuate cross-sectional area formed by the lower portion of the downcomer (15) and the tower wall is S2; and S1:S2 is 1:0.55-0.

6.

8. A tray according to claim 6, Features: The tower tray (13) comprises two side arched parts and a middle trapezoidal part, the float valve W1 located in the arched part is less than W2, and the float valve W1 in the trapezoidal part is equal to W2.

Images