CN112973615A - Mixing valve tower plate arranged in high density - Google Patents
Mixing valve tower plate arranged in high density Download PDFInfo
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- CN112973615A CN112973615A CN202110271462.7A CN202110271462A CN112973615A CN 112973615 A CN112973615 A CN 112973615A CN 202110271462 A CN202110271462 A CN 202110271462A CN 112973615 A CN112973615 A CN 112973615A
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- 238000007667 floating Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 abstract description 36
- 238000012546 transfer Methods 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 5
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
- B01D3/324—Tray constructions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A mixing valve column plate with high density arrangement belongs to the technical field of chemical column plates. The tray comprises a downcomer and a tray, wherein a plurality of fixed valve holes and floating valve holes are uniformly distributed on the tray, the three adjacent fixed valve holes are distributed in a regular triangle manner, the floating valve holes are arranged at the central positions between the three adjacent fixed valve holes, the fixed valve holes are provided with fixed valves, the floating valves are arranged in the floating valve holes, and the fixed valves and the floating valves are arranged in a staggered manner. The special micro float valve is adopted to replace sieve pores, so that part of liquid is prevented from leaking at low gas velocity, and liquid leakage of the tower plate is reduced; under high gas velocity, the liquid partially carried to the upper tower plate by gas from the lower tower plate is blocked, and entrainment is reduced; by utilizing the mixing arrangement of the fixed valve and the floating valve, the gas-liquid mass transfer is enhanced, and the gas velocity required by the flooding of the column plate is delayed; the height difference of the fixed valve and the floating valve is utilized, the uniformity of the liquid-layer gas content of the whole column plate is increased, the gas-liquid mass transfer is facilitated, and the column plate efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of chemical tower plates, and particularly relates to a high-density arranged mixing valve tower plate.
Background
In the operation and production of chemical industry, oil refining, environmental protection, medicine and other industries, the operations of chemical unit such as rectification, absorption, desorption and the like can not be separated, the gas-liquid and liquid-liquid mass transfer processes are mainly completed in tower equipment, and a plate tower is taken as a tower and is one of the most widely applied separation equipment in the petroleum and chemical industry. The current industrial commonly used tower plates mainly comprise sieve tray, float valve tower plate and fixed valve tower plate, the sieve tray has the advantages of simple structure, small pressure drop, low manufacturing cost and the like, but has the defects of large entrainment of mist, serious liquid leakage, small operation elasticity, low mass transfer efficiency and the like; the float valve tower plate has the advantages of small liquid leakage, small entrainment, large operation elasticity and the like, but has the defects of more material consumption, high manufacturing cost, easy clamping of the float valve and the like; the fixed valve column plate has the advantages of convenient manufacture, lower cost, high column plate strength and the like, but has the defects of small operation elasticity and the like, and the performance of the fixed valve column plate is similar to that of the floating valve column plate.
In the experimental research process of the common mixing fixed valve, although the open area on the tower plate is fully utilized, the liquid leakage and entrainment of the tower plate are still serious.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a mixing valve column plate arranged in a high density mode, wherein special micro floating valves are adopted on a common mixing fixed valve column plate to replace sieve holes, so that liquid leakage and entrainment of the column plate can be obviously reduced, meanwhile, the gas-liquid contact time is prolonged, and the gas-liquid mass transfer is enhanced.
The invention provides the following technical scheme: a mixing valve tray arranged in high density comprises a downcomer and a tray, and is characterized in that: the tray is evenly distributed with a plurality of fixed valve holes, the fixed valve holes are distributed in a regular triangle shape between every three adjacent fixed valve holes, the central positions between every three adjacent fixed valve holes are provided with floating valve holes, the fixed valves are arranged in the fixed valve holes, the floating valves are arranged in the floating valve holes, and the fixed valves and the floating valves are arranged in a staggered manner.
The mixing valve tower plate arranged in high density is characterized in that the fixed valve is a circular fixed valve and comprises three inclined fixed valve legs and a fixed valve cover, and the fixed valve cover comprises a first valve face and folded edges arranged around the first valve face.
The high-density arranged mixing valve tower plate is characterized in that the floating valve is a micro floating valve and comprises three vertical floating valve legs and a floating valve cover, and the floating valve cover comprises a second valve surface and folded edges arranged on the periphery of the second valve surface.
The mixing valve tower plate arranged in high density is characterized in that the valve legs of the fixed valves are arranged at the lower part of the valve covers of the fixed valves, the three valve legs of the fixed valves are mutually arranged in an angle of 120 degrees, the height of the valve legs of the fixed valves is 9-12mm, and the diameter of the valve covers of the fixed valves is 20-40 mm.
The high-density arranged mixing valve tower plate is characterized in that the valve legs of the floating valves are arranged at the lower part of the valve covers of the floating valves, the three valve legs of the floating valves are mutually arranged at an angle of 120 degrees, the height of the valve legs of the floating valves is 6-9 mm, and the diameter of the valve covers of the floating valves is 10-20 mm.
The valve leg of the float valve is of an L-shaped structure, the valve cover of the float valve is disc-shaped, and the upper end of the valve leg of the L-shaped float valve is fixed on the valve cover of the float valve and arranged along the tangential direction of the valve cover of the float valve.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1) in the invention, special micro float valves are adopted to replace sieve holes, and the float valves are not fully opened at low air speed, thus blocking partial liquid leakage and reducing liquid leakage of the tower plate; the high-gas-speed lower floating valve is fully opened, so that part of liquid carried to the upper-layer tower plate from the lower-layer tower plate by gas is blocked, and entrainment is reduced;
2) the invention utilizes the mixing arrangement of the fixed valve and the floating valve to intensify the collision of the gas from the floating valve and the fixed valve, on one hand, the residence time of the gas on the tower plate is increased, and the gas-liquid mass transfer is strengthened; on the other hand, the gas phase load is increased, and the gas velocity required by the column plate flooding is delayed;
3) the invention utilizes the difference of the height of the fixed valve and the floating valve to enhance the two-phase transmission of the liquid layer at the bottom of the column plate, increase the uniformity of the gas content of the whole liquid layer of the column plate, be beneficial to gas-liquid mass transfer and improve the efficiency of the column plate.
Drawings
FIG. 1 is a schematic overall view of a mixing valve tray of the present invention;
FIG. 2 is a schematic overall view of a conventional mixed standing valve tray;
FIG. 3 is a schematic perspective view of a fixed valve on a mixing valve tray of the present invention;
FIG. 4 is a schematic perspective view of a float valve on the mixing valve tray of the present invention;
FIG. 5 is a graph comparing the liquid leakage rate of a mixing valve tray of the present invention with a conventional mixing fixed valve tray;
FIG. 6 is a graph of a comparison of entrainment of a mixing valve tray of the present invention with a conventional mixing fixed valve tray;
FIG. 7 is a graph of wet plate pressure drop comparison of a mixing valve tray of the present invention to a conventional mixing fixed valve tray;
FIG. 8 is a front view of the full open float valve on the mixing valve tray of the present invention.
In the figure: 1. a downcomer; 2. a tray; 3. a fixed valve; 4. a float valve; 5. screening holes; 6. fixing the valve cover of the valve; 7. fixing a valve leg of the valve; 8. a fixed valve bore; 9. a valve cover of the float valve; 10. a float valve leg; 11. valve hole of the float valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
As shown in fig. 1, a mixing valve tray arranged in high density comprises a downcomer 1 and a tray 2, wherein a plurality of float valve holes 11 and fixed valve holes 8 with different diameters are arranged on the tray 2, and the three adjacent fixed valve holes 8 are distributed in a regular triangle manner, specifically: a plurality of fixed valve hole 8 is the multiseriate and arranges, and fixed valve hole 8 dislocation between two adjacent lists is arranged, and fixed valve hole 8 in one of them is arranged in another row on the central line between two adjacent fixed valve hole 8.
The float valve hole 11 is arranged at the central position between three adjacent fixed valve holes 8, the fixed valve 3 is arranged in the fixed valve hole 8, the float valve 4 is arranged in the float valve hole 11, and the fixed valve 3 and the float valve 4 are arranged in a staggered mode.
Wherein, the diameter of tray is 1200 mm, and it has 516 valve openings to open on the tray 2, and the quantity of standing valve opening 8 is 184, and the quantity of float valve opening 11 is 332, and tray percent opening is 29.67%, and the diameter of standing valve opening 8 is 40mm, and horizontal centre of a circle is 60mm, and the diameter of float valve opening 11 is 20 mm, and horizontal centre of a circle is 60mm, and this tray adopts rectangular downcomer 1 as liquid circulation channel.
Referring to fig. 2, a common mixed fixed valve tray is provided with 516 valve holes on a tray 2, the number of the fixed valve hole 8 is 184, the number of the sieve holes 5 is 332, the opening rate of the tray is 29.67%, the diameter of the fixed valve hole 8 is 40mm, the horizontal center distance is 60mm, the diameter of the sieve hole 5 is 20 mm, the horizontal center distance is 60mm, and the tray adopts a rectangular downcomer 1 as a liquid circulation channel.
As shown in fig. 3, the fixed valve 3 is a circular fixed valve, and comprises three inclined fixed valve legs 7 and a fixed valve cover 6; wherein, the diameter of the valve cover 6 of the fixed valve is 40mm, the height of the valve leg 7 of the fixed valve is 9 mm, and the width of the valve leg 7 of the fixed valve is 5 mm.
As shown in fig. 4, the float valve 4 is a micro float valve, and includes three upright float valve legs 10 and a float valve cover 9; wherein, the diameter of the valve cover 9 of the float valve is 20 mm, the height of the valve leg 10 of the float valve is 6mm, and the width of the valve leg 10 of the float valve is 5 mm. The valve leg 10 of the float valve is of an L-shaped structure, the valve cover 9 of the float valve is disc-shaped, and the upper end of the valve leg 10 of the L-shaped float valve is fixed on the valve cover 9 of the float valve and arranged along the tangential direction of the valve cover 9 of the float valve
The first embodiment is as follows:
in an organic glass tower with the plate spacing of 600 mm and the diameter of 1219 mm, mixing valve trays or common mixing fixed valve trays arranged in high density are installed, the tray in the middle layer is a test tray, the tray in the lower layer is a gas distribution plate, the tray in the upper layer is a liquid distribution plate, 516 valve holes are formed in the tray 2 of the common mixing fixed valve tray, 184 valve holes 8 of the fixed valve are formed, 332 sieve holes are formed, the aperture ratio of the tray is 29.67%, the diameter of the valve holes 8 of the fixed valve is 40mm, the horizontal center distance of the circles is 60mm, the diameter of the sieve holes 5 is 20 mm, and the horizontal center distance of the circles is 60 mm; 516 valve openings are formed in the mixed valve tray 2 which is arranged in a high-density mode, 184 valve openings are formed in the fixed valve openings 8, 332 valve openings 11 in the floating valve, the opening rate of the tray is 29.67%, the diameter of each valve opening 8 in the fixed valve is 40mm, the horizontal center distance of the fixed valve is 60mm, the diameter of each valve opening 11 in the floating valve is 20 mm, and the horizontal center distance of the floating valve is 60 mm. The column plate adopts a rectangular downcomer 1 as a liquid flow channel, and a leakage collector is arranged below the lower column plate and used for measuring leakage. The liquid leakage rate of the mixed valve trays and the common mixed fixed valve trays arranged in high density under different gas-liquid loads was measured by using air and water as operating systems (in this example, the mixed valve trays arranged in high density are compared with the structure shown in the attached figure 1, and in this example, the common mixed fixed valve trays are compared with the structure shown in the attached figure 2).
The test result is shown in figure 5, wherein the abscissa of the graph is the valve hole kinetic energy factor, and the ordinate of the graph is the leakage rate. It can be seen that, under the same spray density, when the kinetic energy factor of the valve hole is 6.8-8.3 (m/s) · (kg/m3)0.5, the liquid leakage rate of the mixing valve column plate arranged in high density is 20% -30% less than that of the common mixing fixed valve column plate.
Example two:
in an organic glass tower with the plate spacing of 600 mm and the diameter of 1219 mm, mixing valves or common mixing fixed valve trays arranged in high density are installed, the tray in the middle layer is a test tray, the tray in the lower layer is a gas distribution plate, the tray in the upper layer is a liquid distribution plate, 516 valve holes are formed in the tray 2 of the common mixing fixed valve tray, 184 valve holes 8 of the fixed valve are formed, 332 sieve holes are formed, the aperture ratio of the tray is 29.67%, the diameter of the valve holes 8 of the fixed valve is 40mm, the horizontal center distance of the circles is 60mm, the diameter of the sieve holes 5 is 20 mm, and the horizontal center distance of the circles is 60 mm; 516 valve holes are formed in the mixed valve tray 2 arranged in a high-density mode, 184 valve holes are formed in the fixed valve holes 8, 332 valve holes are formed in the floating valve holes 11, the opening rate of the tray is 29.67%, the diameter of each valve hole 8 of the fixed valve is 40mm, the horizontal center distance is 60mm, the diameter of each valve hole 11 of the floating valve is 20 mm, and the horizontal center distance is 60 mm. The column plate adopts a rectangular downcomer 1 as a liquid circulation channel, and a entrainment collector is arranged above the upper-layer column plate and is used for measuring entrainment. The entrainment rate of the mixed valve trays and the common mixed fixed valve trays arranged in high density under different gas-liquid loads was measured by using air and water as an operating system (in this example, the mixed valve trays arranged in high density are compared with the structure shown in fig. 1, and in this example, the common mixed fixed valve trays are compared with the structure shown in fig. 2).
The test result is shown in figure 6, wherein the abscissa of the graph is a valve hole kinetic energy factor, and the ordinate of the graph is an entrainment rate. It can be seen that under the same spraying density, when the kinetic energy factor of the valve hole is 6.2-7.2 (m/s) · (kg/m3)0.5, the entrainment rate of the mixing valve tower plate arranged in high density is 50% -60% less than that of the common mixing fixed valve tower plate.
Example three:
in an organic glass tower with the plate spacing of 600 mm and the diameter of 1219 mm, mixing valve trays or common mixing fixed valve trays arranged in high density are installed, the tray in the middle layer is a test tray, the tray in the lower layer is a gas distribution plate, the tray in the upper layer is a liquid distribution plate, 516 valve holes are formed in the tray 2 of the common mixing fixed valve tray, 184 valve holes 8 of the fixed valve are formed, 332 sieve holes are formed, the aperture ratio of the tray is 29.67%, the diameter of the valve holes 8 of the fixed valve is 40mm, the horizontal center distance of a circle is 60mm, the diameter of the sieve holes 5 is 20 mm, and the horizontal center distance of a circle is 60 mm; 516 valve holes are formed in the mixed valve tray 2 arranged in a high-density mode, 184 valve holes are formed in the fixed valve holes 8, 332 valve holes are formed in the floating valve holes 11, the opening rate of the tray is 29.67%, the diameter of each valve hole 8 of the fixed valve is 40mm, the horizontal center distance is 60mm, the diameter of each valve hole 11 of the floating valve is 20 mm, and the horizontal center distance is 60 mm. The column plate adopts a rectangular downcomer 1 as a liquid circulation channel, 4 round holes with the diameter of 10 mm are respectively arranged on the upper tower section and the lower tower section of the column plate at the middle layer, 4 copper pipes with the diameter of 10 mm are obliquely inserted into the tower sections downwards, and the outer sides of the copper pipes are connected with a U-shaped pipe differential pressure gauge through rubber pipes for measuring the pressure drop of the column plate. The wet plate pressure drop of the mixed valve trays and the common mixed fixed valve trays arranged in high density under different gas-liquid loads is measured by taking air and water as operating systems (the mixed valve trays arranged in high density are compared with the structure shown in the attached figure 1 in the embodiment, and the common mixed fixed valve trays are compared with the structure shown in the attached figure 2 in the embodiment).
The test results are shown in fig. 7, where the abscissa is the valve orifice kinetic energy factor and the ordinate is the wet plate pressure drop. It can be seen that, under the same spray density, when the kinetic energy factor of the valve hole is 5.8-7.2 (m/s) · (kg/m3)0.5, the wet plate pressure drop of the mixing valve tray arranged in high density is 15% -20% larger than that of the common mixing fixed valve tray.
By comparing the results of the above examples, it can be seen that under the same operating conditions, entrainment and leakage rates of the mixing valve trays arranged in high density are significantly lower than those of the common fixed valve trays, and the pressure drop of the wet plate is greater than that of the fixed valve trays with the sieve holes 5; compared with the common mixed fixed valve column plate, the mixed valve column plate arranged in a high density mode not only can obviously reduce entrainment of column plate mist and effectively reduce leakage of a valve hole, but also enhances two-phase transfer of a liquid layer at the bottom of the column plate, increases pressure drop of a wet plate, increases the retention time of gas on the column plate, strengthens gas-liquid contact mass transfer, and improves the mass transfer efficiency and the treatment capacity of the column plate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A mixing valve tray arranged in high density comprises a downcomer (1) and a tray (2), and is characterized in that: the tray (2) is provided with a plurality of fixed valve holes (8) in a uniformly distributed manner, each three adjacent fixed valve hole (8) is distributed in a regular triangle manner, the central positions between every three adjacent fixed valve holes (8) are provided with floating valve holes (11), fixed valves (3) are arranged in the fixed valve holes (8), floating valves (4) are arranged in the floating valve holes (11), and the fixed valves (3) and the floating valves (4) are arranged in a staggered manner.
2. A high-density array of mixing valve trays as claimed in claim 1, characterized in that the fixed valve (3) is a circular fixed valve comprising three inclined fixed valve legs (7) and a fixed valve cover (6), the fixed valve cover (6) comprising a first valve face and a flange arranged around the first valve face.
3. A high-density array of mixing valve trays as claimed in claim 1, wherein the float valves (4) are micro-float valves comprising three upright float valve legs (10) and a float valve cover (9), the float valve cover (9) comprising a second valve face and a flange arranged around the second valve face.
4. A high-density array of mixing valve trays according to claim 2, characterized in that the fixed valve legs (7) are arranged at the lower part of the fixed valve deck (6), the three fixed valve legs (7) are arranged at 120 ° to each other, the height of the fixed valve legs (7) is 9-12mm, and the diameter of the fixed valve deck (6) is 20-40 mm.
5. A high-density array of mixing valve trays according to claim 3, characterized in that the valve legs (10) are arranged at the lower part of the valve cover (9), the three valve legs (10) are arranged at 120 ° to each other, the height of the valve legs (10) is 6-9 mm, and the diameter of the valve cover (9) is 10-20 mm.
6. A high-density array of mixing valve trays as claimed in claim 5, characterized in that the valve legs (10) are of L-shaped configuration, the valve cover (9) is disc-shaped, and the upper ends of the L-shaped valve legs (10) are fixed to the valve cover (9) and arranged along the tangent of the valve cover (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110271462.7A CN112973615A (en) | 2021-03-12 | 2021-03-12 | Mixing valve tower plate arranged in high density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110271462.7A CN112973615A (en) | 2021-03-12 | 2021-03-12 | Mixing valve tower plate arranged in high density |
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| Publication Number | Publication Date |
|---|---|
| CN112973615A true CN112973615A (en) | 2021-06-18 |
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ID=76335104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110271462.7A Pending CN112973615A (en) | 2021-03-12 | 2021-03-12 | Mixing valve tower plate arranged in high density |
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| Country | Link |
|---|---|
| CN (1) | CN112973615A (en) |
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2021
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Application publication date: 20210618 |
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| RJ01 | Rejection of invention patent application after publication |