CN111946890B - Cap-shaped float valve tower disc and plate tower - Google Patents
Cap-shaped float valve tower disc and plate tower Download PDFInfo
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- CN111946890B CN111946890B CN202010659529.XA CN202010659529A CN111946890B CN 111946890 B CN111946890 B CN 111946890B CN 202010659529 A CN202010659529 A CN 202010659529A CN 111946890 B CN111946890 B CN 111946890B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Float Valves (AREA)
Abstract
The invention relates to the field of accessories of plate tower equipment, in particular to a cap-shaped floating valve tray, which comprises a tray plate arranged along the horizontal direction, wherein a valve hole is formed in the tray plate, a floating valve capable of moving along the vertical direction is arranged in the valve hole, and the floating valve comprises a valve cap and a limiting assembly. The tray board top surface sets up the leak protection weir at the valve opening border, and the valve cap includes the flat top lid and locates the turn-down edge at flat top lid edge, and the internal diameter on turn-down edge down is greater than the external diameter on leak protection weir top, and spacing subassembly is including locating three at least valve legs of valve cap bottom perpendicularly, and each valve leg is all worn to locate in the leak protection weir, and the valve leg bottom is located tray board below, and the valve leg sets up perpendicularly in the bottom can with the lower fender arm of tray board butt. When the lower baffle arm is abutted against the bottom surface of the tray plate, the lower edge of the lower flanging is positioned below the upper edge of the leakage-proof weir. In addition, the invention also provides a plate tower with the tower tray. The tray has the advantages of a float valve and a bubble cap, is suitable for a lower gas phase load working condition, can effectively prevent liquid leakage and has higher mass transfer efficiency.
Description
Technical Field
The invention relates to the field of accessories of plate tower equipment, in particular to a cap-shaped float valve tower tray and a plate tower with the same.
Background
The plate tower is a mass transfer device for the fractional contact of a gas-liquid or liquid-liquid system, and generally comprises a plurality of trays arranged at intervals, wherein a gas phase is mixed and contacted with a liquid phase flowing transversely above the trays from the lower part of the trays through a bubbling unit of a type such as a floating valve, a bubble cap and the like arranged on the trays, and then enters the tray on the upper layer, and the liquid phase enters the tray on the lower layer through a downcomer.
The form of the bubbling unit determines the flowing state of the gas phase when the gas phase passes through the tower tray, and the mixing degree and the mass transfer effect of the gas phase and the liquid phase can be influenced, so that the overall performance of the tower tray is influenced. The tray plate of the bubble cap tray is provided with the riser structure, so that liquid leakage is not easy to occur under lower gas phase load, but the bubble cap tray has large pressure drop, thick liquid layer, general mass transfer efficiency and higher cost, so the application range is narrower. The floating valve tray can transfer mass well under the bubbling state with slightly low gas velocity because gas passes through the tray along the horizontal direction from the valve periphery, but liquid leakage is easy to occur under the condition of low gas phase load. Therefore, it is necessary to develop a tray which has reliable mass transfer efficiency and is not easy to leak liquid for the working condition of lower gas phase load.
Disclosure of Invention
The invention aims to provide a cap-type floating valve tray which is suitable for the working condition of lower gas phase load by integrating the advantages of the existing bubble cap tray and the existing floating valve tray in the aspects of liquid leakage prevention and mass transfer efficiency.
A second object of the present invention is to provide a tray column having the aforementioned cap-type float valve tray.
In order to achieve the first object, the invention provides a cap-type floating valve tray, which comprises a tray plate arranged along the horizontal direction, wherein a valve hole is formed in the tray plate, and a floating valve capable of moving along the vertical direction is arranged in the valve hole. The tray board top surface sets up the leak protection weir at the valve opening border, and the valve cap includes the flat top lid and locates the turn-down edge at flat top lid edge, and the internal diameter on turn-down edge down is greater than the external diameter on leak protection weir top, and spacing subassembly is including locating three at least valve legs of valve cap bottom perpendicularly, and each valve leg is all worn to locate in the leak protection weir, and the valve leg bottom is located tray board below, and the valve leg sets up perpendicularly in the bottom can with the lower fender arm of tray board butt. When the lower baffle arm is abutted against the bottom surface of the tray plate, the lower edge of the lower flanging is positioned below the upper edge of the leakage-proof weir; the lower flanging comprises an annular connecting part and a conical pipe part, the connecting part is positioned between the flat top cover and the conical pipe part, the axial section of the connecting part is in two symmetrical circular arcs, the inner diameter of the conical pipe part is continuously narrowed from bottom to top, and the inner diameter of the lower edge of the conical pipe part is larger than the outer diameter of the top end of the leakage-proof weir.
According to the scheme, in the moving range of the floating valve, the valve cap is partially overlapped with the leakage-proof weir all the time in the vertical direction and forms an annular gas channel with the leakage-proof weir, and the upper part of the lower flanging is a connecting part in smooth transition with the flat top cover, so that the air flow can be effectively guided to turn and flow downwards, and the kinetic energy loss is reduced. The lower part of the lower flanging is a horn-shaped taper pipe part, which is beneficial to expanding and dispersing gas in the annular channel and fully transferring mass with a liquid phase layer of the tray, the flowing direction of the gas in the float valve tray can undergo two times of conversion, a gas phase can maintain a radial horizontal flowing state with a longer distance in the mass transfer process, the theoretical mass transfer range of the periphery of each valve hole on the tray plate is larger, the tray efficiency is improved, and the mass transfer dead zone on the tray is reduced. The valve cap capable of moving up and down can dynamically adjust the opening of the float valve along with the change of gas phase load, the advantage of the float valve tray in the aspect of operation elasticity is reserved, the leakage-proof weir is similar to a riser in a bubble cap tray, the tray can be prevented from leaking liquid under the condition of low gas phase load, and therefore the cap-type float valve tray has the advantages of the float valve tray and the bubble cap tray.
The further proposal is that the anti-leakage weir is a taper pipe structure with the inner diameter continuously narrowing from bottom to top, and the taper angle of the anti-leakage weir is larger than that of the taper pipe part.
Therefore, the anti-leakage weir helps to narrow the width of the outlet of the gas annular channel, so that the flow rate of gas flowing out of the valve cap is increased, and the mass transfer effect is improved.
The further proposal is that the upper end of the valve leg is vertically provided with an upper support arm, and the end part of the upper support arm is positioned at the outer side of the upper edge of the leakage-proof weir.
It is thus clear that the upper boom can leave the leak protection weir upper limb with the bonnet frame for the floating valve possesses certain aperture all the time, guarantees the mass transfer efficiency of tower tray under the extremely low gas phase load. In addition, the contact area of the upper support arm and the leakage-proof weir is small, so that the adhesion between the float valve and the leakage-proof weir caused by residual viscous liquid phase can be prevented.
The further scheme is that the limiting assembly comprises two connecting bands and four valve legs, each connecting band is attached to and connected with the inner wall of the valve cap at two ends of the top surface, the two connecting bands are perpendicularly intersected in the middle, the intersection of the two connecting bands is located at the center of the flat top cover, and the top ends of the valve legs are fixedly connected with the end portions of the connecting bands.
Therefore, 4 valve legs are symmetrically distributed in the valve cap, and the upper ends of two non-adjacent valve legs are connected into a whole by means of a connecting belt and are fixedly connected with the valve cap, so that the structural stability of the limiting assembly is improved.
The further proposal is that the top of the outer end of the lower retaining arm is provided with a wedge-shaped bulge.
Therefore, the wedge-shaped bulge is introduced into the outer end of the lower retaining arm, so that the contact area between the lower retaining arm and the tray plate can be reduced, and the adhesion between the float valve and the tray plate caused by the residual viscous liquid phase can be effectively prevented.
Further, the height of the leakage-proof weir is 2.5mm to 50 mm.
From the above, considering the characteristics of the float valve tray, the leakage proof weir should not be set too high, and the height of the leakage proof weir can be limited to the above range by referring to the size ratio of the leakage proof weir to the float valve.
The further proposal is that the horizontal distance between the lower edge of the taper pipe part and the upper edge of the leakage-proof weir is 2.5mm to 30 mm.
Therefore, the horizontal distance between the lower edge of the conical pipe part and the upper edge of the leakage-proof weir, namely the upper width limit of the annular gas channel, can ensure that the mass transfer efficiency of the tower tray meets the conventional design requirement by controlling the upper width limit of the annular gas channel within the range.
In order to achieve the second object, the present invention provides a plate column, which is characterized in that the plate column has the above-mentioned cap-type float valve tray.
Drawings
FIG. 1 is a diagram of the mating structure of the float valve and tray plate in an embodiment of the cap-type float valve tray of the present invention.
Fig. 2 is a block diagram of an embodiment of a cap-type float valve tray of the present invention.
Fig. 3 is a first perspective view of a float valve in an embodiment of a cap-type float valve tray of the present invention.
Fig. 4 is a second perspective view of a float valve in an embodiment of a cap-type float valve tray of the present invention.
Fig. 5 is a block diagram of a tray deck in an embodiment of a cap-type float valve tray of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Referring to fig. 1 to 5, the cap-type float valve tray provided by the present invention includes a tray plate 1 disposed along a horizontal direction, a valve hole 11 is disposed on the tray plate 1, a float valve movable along a vertical direction is disposed in the valve hole 11, the float valve includes a valve cap 2 and a limiting component 3, a leakage-proof weir 12 is disposed on a top surface of the tray plate 1 at an edge of the valve hole 11, the valve cap 2 includes a flat top cap 21 and a downward flange 22 disposed at an edge of the flat top cap 21, an inner diameter of a lower edge of the downward flange 22 is greater than an outer diameter of a top end of the leakage-proof weir 12, the limiting component 3 includes at least three valve legs 31 vertically disposed at a bottom of the valve cap 2, each valve leg 31 is disposed in the leakage-proof weir 12, a bottom end of the valve leg 31 is disposed below the tray plate 1, and a lower arm 311 capable of abutting against the tray plate 1 is vertically disposed at a bottom end of the valve leg 31. When the lower blocking arm 311 abuts against the bottom surface of the tray plate 1, the lower edge of the lower flange 22 is located below the upper edge of the anti-leakage weir 12.
It should be noted that, a plurality of valve holes 11 are actually arranged on the tray plate 1 at intervals, a leakage-proof weir 12 is arranged at the edge of each valve hole 11, a float valve is arranged in each valve hole 11, and for the convenience of viewing, fig. 1 to 5 only show the partial structure corresponding to one valve hole 11 on the tray.
In the moving range of the floating valve, the valve cap 2 is always partially overlapped with the leakage-proof weir 12 in the vertical direction and forms an annular gas channel with the leakage-proof weir 12, after ascending gas impacts the flat top cover 21, the ascending gas lifts the valve cap 2 and is folded downwards at the lower flanging 22 to enter the gap between the lower flanging 22 and the leakage-proof weir 12, and then the ascending gas acts on the liquid phase layer of the tray and the tray plate 1 and is converted into radial horizontal flow. Therefore, the flowing direction of the gas in the floating valve tray is changed twice, the gas phase can maintain a radial horizontal flowing state for a long distance in the mass transfer process, and the theoretical mass transfer range of the periphery of each valve hole 11 on the tray plate 1 is larger, so that the efficiency of the tray is improved, and the mass transfer dead zone on the tray is reduced. The valve cap 2 which can move up and down can dynamically adjust the opening of the float valve along with the change of gas phase load, the advantage of the float valve tray in the aspect of operation elasticity is reserved, the leakage-proof weir 12 is similar to a riser in a bubble cap tray, the tray can be prevented from leaking liquid under the condition of low gas phase load, and therefore the cap-type float valve tray has the advantages of the float valve tray and the bubble cap tray.
The lower flanging 22 comprises an annular connecting part 221 and a taper pipe part 222, the connecting part 221 is positioned between the flat top cover 21 and the taper pipe part 222, the axial section of the connecting part 221 is in two symmetrical circular arcs, the inner diameter of the taper pipe part 222 is continuously narrowed from bottom to top, and the inner diameter of the lower edge of the taper pipe part 222 is larger than the outer diameter of the top end of the leakage-proof weir 12.
The upper part of the downward flanging 22 is a connecting part 221 smoothly transited with the flat top cover 21, which can effectively guide the airflow to turn and flow downwards and reduce the kinetic energy loss. The lower part of the lower flanging 22 is provided with a trumpet-shaped taper pipe part 222 which is helpful for gas to spread in the annular channel and fully transfer mass with the liquid phase layer of the tray, and the central angle corresponding to the circular arc-shaped part of the axial section of the connecting part 221 in the embodiment is 90 degrees.
The leakage preventing weir 12 has a tapered pipe structure in which the inner diameter is continuously narrowed from the bottom to the top, and the taper angle of the leakage preventing weir 12 is larger than the taper angle of the tapered pipe portion 222.
The leak-proof weir 12 helps to narrow the width of the outlet of the gas annular passage, thereby increasing the flow rate of the gas flowing out of the valve cap 2 and improving the mass transfer effect.
The upper end of the valve leg 31 is vertically provided with an upper support arm 312, and the end of the upper support arm 312 is positioned outside the upper edge of the leakage-proof weir 12.
The upper support arm 312 can support the valve cap 2 away from the upper edge of the leakage-proof weir 12, so that the floating valve always has a certain opening degree, and the mass transfer efficiency of the tray under extremely low gas phase load is ensured. In addition, the contact area between the upper arm 312 and the anti-leakage weir 12 is small, so that the adhesion between the float valve and the anti-leakage weir 12 caused by the residual viscous liquid phase can be prevented. It is also easy to think that the practical implementation is more stable for the working conditions, so that the distance between the upper arm 312 and the lower arm 311 is just equal to the sum of the height of the leakage-proof weir 12 and the thickness of the tray plate 1, that is, the shape of the annular gas channel can be kept unchanged in the fixed-valve tray embodiment corresponding to the floating-valve tray embodiment.
The limiting assembly 3 comprises two connecting belts 32 and four valve legs 31, each connecting belt 32 is attached to and connected with the inner wall of the bonnet 2 at two ends of the top surface, the two connecting belts 32 are vertically intersected in the middle, the intersection of the two connecting belts 32 is located in the center of the flat top cover 21, and the top ends of the valve legs 31 are fixedly connected with the end portions of the connecting belts 32.
4 valve legs are symmetrically distributed in the valve cap 2, and the upper ends of two non-adjacent valve legs 31 are connected into a whole by means of a connecting belt 32 and are fixedly connected with the valve cap 2, so that the structural stability of the limiting assembly 3 is improved.
The top of the outer end of the lower baffle arm 311 is provided with a wedge-shaped protrusion 313, and the contact area between the lower baffle arm 311 and the tray plate 1 can be reduced by introducing the wedge-shaped protrusion 313 into the outer end of the lower baffle arm 311, so that the adhesion between the float valve and the tray plate 1 caused by the residual viscous liquid phase is effectively prevented.
In the embodiment, the valve leg 31, the lower retaining arm 311 and the upper supporting arm 312 are all sheet-shaped members, an integrated independent part is formed by one connecting band 32 in the limiting component 3, the two valve legs 31, the two lower retaining arms 311 and the two upper supporting arms 312, the main body part of the independent part is perpendicularly bent twice to obtain the two valve legs 31 and the connecting band 32, and the valve leg can be obtained by cutting a whole plate and then bending and processing the plate partially. The lower retaining arm 311 and the upper retaining arm 312 are arranged in the form of flanges on the valve leg 31, and the wedge-shaped projection 313 is a triangular convex part on the lower retaining arm 311. Two ends of the two connecting bands 32 are attached to the inner wall of the joining part 221 and connected in a spot welding manner, and one connecting band 32 below the junction of the two connecting bands 32 is provided with an inverted U-shaped bending part for avoiding.
The height of the leakage-proof weir 12 is 2.5mm to 50mm, and the horizontal distance between the lower edge of the taper pipe part 222 and the upper edge of the leakage-proof weir 12 is 2.5mm to 30 mm.
Considering the characteristics of the float valve tray, the leakage preventing weir should not be set too high, and the height of the leakage preventing weir 12 can be limited to the above range with reference to the size ratio of the leakage preventing weir 12 to the float valve. The horizontal distance between the lower edge of the conical pipe part 222 and the upper edge of the leakage-proof weir 12, namely the upper width limit of the annular gas channel, is controlled within the range, so that the mass transfer efficiency of the tray can meet the conventional design requirement.
The downward flanging 22 in the valve cap 2, the valve hole 11 on the tray plate 1 and the leakage-proof weir 12 can be obtained by an integral punching and forming process of a plate, and if the vertical height of the downward flanging 22 and the leakage-proof weir 12 is too large or the ductility of the plate is poor, the downward flanging 22 and the leakage-proof weir 12 can be considered to be separately processed and then assembled on the plate in a tailor welding way.
Claims (7)
1. The utility model provides a cap type float valve tray, includes the tray board that sets up along the horizontal direction, be equipped with the valve opening on the tray board, the float valve that can follow vertical direction removal is equipped with in the valve opening, its characterized in that:
the floating valve comprises a valve cap and a limiting assembly, wherein a leakage-proof weir is arranged on the top surface of the tray plate at the edge of the valve hole, the valve cap comprises a flat top cover and a lower flanging arranged at the edge of the flat top cover, the inner diameter of the lower edge of the lower flanging is larger than the outer diameter of the top end of the leakage-proof weir, the limiting assembly comprises at least three valve legs vertically arranged at the bottom of the valve cap, each valve leg is arranged in the leakage-proof weir in a penetrating manner, the bottom ends of the valve legs are positioned below the tray plate, lower blocking arms capable of being abutted against the tray plate are vertically arranged at the bottom ends of the valve legs, and when the lower blocking arms are abutted against the bottom surface of the tray plate, the lower edges of the lower flanging are positioned below the upper edge of the leakage-proof weir; the lower flanging comprises an annular connecting part and a conical pipe part, the connecting part is positioned between the flat top cover and the conical pipe part, the axial section of the connecting part is in two symmetrical circular arc shapes, the central angle corresponding to the circular arc-shaped part of the axial section of the connecting part is 90 degrees, the inner diameter of the conical pipe part is narrowed continuously from bottom to top, the inner diameter of the lower edge of the conical pipe part is larger than the outer diameter of the top end of the leakage-proof weir, the leakage-proof weir is a conical pipe structure with the inner diameter narrowed continuously from bottom to top, and the cone angle of the leakage-proof weir is larger than the cone angle of the conical pipe part.
2. The cap-type float valve tray of claim 1, wherein:
the upper end of the valve leg is vertically provided with an upper support arm, and the end part of the upper support arm is positioned on the outer side of the upper edge of the leakage-proof weir.
3. The cap-type float valve tray of claim 1, wherein:
spacing subassembly includes two connecting bands and four valve leg, each the connecting band is connected, two at top surface both ends and the laminating of valve cap inner wall the connecting band is crossing perpendicularly at the middle part, and two the intersection of connecting band is located flat top cap center department, valve leg top with connecting band tip fixed connection.
4. The cap-type float valve tray of claim 1, wherein:
the top of the outer end of the lower retaining arm is provided with a wedge-shaped bulge.
5. The cap-type float valve tray of any one of claims 1 to 4, wherein:
the height of the leakage-proof weir is 2.5mm to 50 mm.
6. The cap-type float valve tray of any one of claims 1 to 4, wherein:
the horizontal distance between the lower edge of the taper pipe part and the upper edge of the leakage-proof weir is 2.5 mm-30 mm.
7. A tray column, characterized in that:
the tray column has a cap-type float valve tray according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659529.XA CN111946890B (en) | 2020-07-10 | 2020-07-10 | Cap-shaped float valve tower disc and plate tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659529.XA CN111946890B (en) | 2020-07-10 | 2020-07-10 | Cap-shaped float valve tower disc and plate tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111946890A CN111946890A (en) | 2020-11-17 |
| CN111946890B true CN111946890B (en) | 2022-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010659529.XA Active CN111946890B (en) | 2020-07-10 | 2020-07-10 | Cap-shaped float valve tower disc and plate tower |
Country Status (1)
| Country | Link |
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| CN (1) | CN111946890B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1048223A (en) * | 1963-02-08 | 1966-11-16 | Herman Stage | Column plate arrangement |
| DE1200256B (en) * | 1963-03-12 | 1965-09-09 | Maschf Augsburg Nuernberg Ag | Valve disk base for mass transfer columns |
| ZA794780B (en) * | 1978-10-05 | 1981-04-29 | British Petroleum Co | Mass transfer equipment |
| CN202740804U (en) * | 2012-07-02 | 2013-02-20 | 魏治中 | Tower plate gas-liquid mass transfer structure for float valve tower |
| KR102208537B1 (en) * | 2015-07-08 | 2021-01-27 | 코크-글리취 엘피 | Contact valve tray for mass transfer columns |
| CN105597358B (en) * | 2016-03-11 | 2018-02-27 | 天津大学 | Leg is along bonnet radially into the equally distributed Round float valve of hexagonal angle and preparation method |
-
2020
- 2020-07-10 CN CN202010659529.XA patent/CN111946890B/en active Active
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| CN111946890A (en) | 2020-11-17 |
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