CN116492936A - Novel rotational flow quenching box - Google Patents
Novel rotational flow quenching box Download PDFInfo
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- CN116492936A CN116492936A CN202310421860.1A CN202310421860A CN116492936A CN 116492936 A CN116492936 A CN 116492936A CN 202310421860 A CN202310421860 A CN 202310421860A CN 116492936 A CN116492936 A CN 116492936A
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- 238000010791 quenching Methods 0.000 title claims abstract description 54
- 230000000171 quenching effect Effects 0.000 title claims abstract description 42
- 238000002156 mixing Methods 0.000 claims abstract description 109
- 239000007788 liquid Substances 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007791 liquid phase Substances 0.000 abstract description 7
- 239000012071 phase Substances 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 10
- 239000000376 reactant Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 7
- 238000005984 hydrogenation reaction Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000005504 petroleum refining Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/04—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
- B01J8/0496—Heating or cooling the reactor
-
- 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
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00327—Controlling the temperature by direct heat exchange
- B01J2208/00336—Controlling the temperature by direct heat exchange adding a temperature modifying medium to the reactants
-
- 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
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00796—Details of the reactor or of the particulate material
- B01J2208/00823—Mixing elements
- B01J2208/00858—Moving elements
- B01J2208/00876—Moving elements outside the bed, e.g. rotary mixer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses a novel rotational flow quenching tank, which comprises a top plate, a bottom plate and a mixing box formed between the top plate and the bottom plate, wherein a hollow annular feeding boss is arranged on the top plate, a feeding throttling hole is formed in the middle of the top plate, a first through hole is formed in the middle of the annular feeding boss, and a feeding rotating plate is radially arranged between the outer side of the first through hole and the inner wall of the annular feeding boss; the middle part of the mixing box is provided with a second through hole, the inside of the mixing box is also provided with a rectifying ring plate, and a mixing rotating plate is radially arranged between the outer side of the second through hole and the inner wall of the rectifying ring plate; the side wall of the rectifying ring plate is provided with a rectifying ring plate orifice; the bottom plate is provided with small holes. The quenching box provided by the invention is additionally provided with a feeding rotating plate; the mixing box is additionally provided with the mixing rotating plate, so that the length of the flow channel is increased, the contact time of the gas phase and the liquid phase is prolonged, the mixing and heat transfer effects are improved, and the radial temperature difference of the inlet of the lower catalyst bed is reduced.
Description
Technical Field
The invention belongs to the technical field of petroleum refining and chemical equipment, and particularly relates to a novel cyclone quenching tank.
Background
Hydrogenation reactions are commonly found in petroleum refining and petrochemical processes, such as hydrocracking, hydrofining reactions, and the like. The hydrogenation reactor provides a place for hydrogenation reaction, and all hydrogenation reactors can release a large amount of reaction heat when in operation, and the performance of the catalyst is influenced by the excessive temperature. Therefore, in order to ensure the exertion of catalyst performance and the stable and safe operation of the device, the bed temperature of the catalyst must be effectively controlled; otherwise, when the exothermic amount of reaction is much larger than the amount of heat removed from the apparatus, the apparatus will generate a huge heat accumulation in a short time, resulting in a sudden rise of the temperature inside the reactor, an unbalance of the system heat, and to a degree that is difficult to control, which is a phenomenon known as "runaway". The phenomena of temperature runaway can cause various adverse effects, such as obviously reducing the selectivity, activity, service life and the like of the catalyst, and serious temperature runaway can even directly cause the sintering deactivation of the catalyst; premature deactivation of the catalyst not only increases the cost of catalyst use, but frequent replacement of the catalyst will greatly shorten the operating cycle of the plant, thereby negatively affecting the overall economic benefits of the refinery. Therefore, when the exothermic amount of reaction is large, it is necessary to take appropriate measures to remove the heat from the reactor. The solution commonly used in industry is to divide the catalyst into several beds when filling it, and to place a quench box between two adjacent catalyst beds to remove the heat of reaction and thereby reduce the temperature of the reactant stream. The number of beds and the respective heights are determined by the temperature rise profile and are generally divided into 2 to 6 beds, each bed being about 3 to 6 meters in height. The quench box is arranged between the adjacent catalyst beds, so that the reaction hot material flows and the coolant are fully mixed and uniformly flow into the next catalyst bed, and the next catalyst bed can continue to carry out hydrogenation reaction.
At present, the mixing mechanism of the coolant and the reaction hot stream in the quenching tank generally comprises throttling, collision and rotational flow, so that a baffle type quenching tank, an impact type quenching tank and a rotational flow type quenching tank are designed.
Patent document US3723072 discloses a typical baffle-type quenching tank, wherein high-temperature fluid from an upper catalyst bed layer enters a quenching tank body through an annular plate with uniformly distributed circular holes under the guidance of a flow channel, cold hydrogen enters the tank body through a circular inlet in the center of a top plate, a circular mixing tank is arranged in the central area of the circular tank, gas-liquid two phases complete preliminary mixing and heat transfer in the circular mixing tank, then the gas-liquid mixture enters a conveying channel under the guidance of a baffle plate, further turbulent flow is carried out in the channel, and the uniform mixing of the gas-liquid two phases is achieved through the reciprocating turn-back process; however, such quench boxes are relatively large in volume and the large number of baffles increases the flow resistance of the fluid, resulting in excessive fluid kinetic energy loss and relatively large pressure drop, and thus, the overall economy is not good.
Patent document US3502445 is representative of impingement quench boxes developed by Union Oil company in the united states. The novel double-layer heat exchanger mainly comprises an upper top plate, a central box body and a lower bottom plate, wherein the upper top plate is provided with two symmetrical circular orifices right above the central box body, two rectangular rectifying baffles are respectively arranged at symmetrical positions on two sides of the central box body, circular small holes are uniformly distributed on the baffles, and circular sieve holes are uniformly distributed on the bottom plate. The reactant flow of the previous bed is blocked by the top plate of the quenching tank, most of the reactant flow is firstly retained on the top plate, and then the gas-phase cooling medium sprayed at high speed is brought into the central tank body through the orifice on the top plate; because the flow area at the orifice is suddenly reduced, the mixture flow generates a throttling effect, and the mixture flow impacts on the bottom plate at a great speed to generate splashing and vortex, so that the disturbance effect of the fluid is enhanced, and then the fluid is further accelerated at the contracted flow channel of the central box body; the mixture flow flowing at high speed flows out of the central box body in two paths after violent collision occurs in the central box body. When encountering the rectifying baffle, a part of the mixture flows out from the openings on the baffle, and the other part of the mixture flows are deflected to the outer side area of the central box body due to collision to the non-opening area of the baffle, and finally all the mixture flows to the next catalyst bed through the sieve holes formed in the bottom plate. The quench box has been widely used in petroleum refining, but the radial temperature difference at the outlet of the catalyst bed is large, sometimes even 10-20 ℃ in a device with heavy crude oil and high gas-liquid ratio as the feed.
Patent document CN2448440Y discloses a spiral-flow type quenching tank comprising a hydrogen cooling pipe, a baffle, a semicircular mixing channel, a tangential flow guide pipe, and a mixing tank. The hot reactant flow from the upper catalyst bed and the cold hydrogen are initially mixed on a baffle plate, then enter a mixing box with the diameter much smaller than that of a quenching box through a semicircular mixing channel, are subjected to internal rotation mixing in the mixing box, are subjected to baffling mixing again through orifices in the lower part of the mixing box, finally reach a sieve plate, and are uniformly distributed and flow to the next catalyst bed through the sieve plate. This configuration results in uneven temperature of the reactant stream exiting the screen plate due to the short contact time of the mixture stream within the mixing chamber, thereby affecting catalyst performance.
In view of this, it is necessary to provide a quench tank with uniform mixing of cold and hot streams, small temperature difference between beds, and simple structure.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a novel cyclone quenching tank so as to ensure that the mixing effect of a cooling medium and a hot reactant stream is more ideal and the temperature distribution of the mixed stream is more uniform.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the novel cyclone quenching box comprises a top plate, a bottom plate and a mixing box, wherein the top plate and the bottom plate are arranged in an up-down separation mode, the mixing box is formed between the top plate and the bottom plate, and the top plate, the mixing box and the bottom plate are arranged in a central symmetry mode; a hollow annular feeding boss is arranged on the top plate, a feeding throttling hole is formed in the middle of the top plate, a first through hole corresponding to the feeding throttling hole is formed in the middle of the annular feeding boss, and a feeding rotating plate is radially arranged between the outer side of the first through hole and the inner wall of the annular feeding boss; the middle part of the mixing box is provided with a second through hole corresponding to the feeding throttling hole, the inside of the mixing box is also provided with a hollow cylindrical rectifying ring plate, and a mixing rotating plate is radially arranged between the outer side of the second through hole and the inner wall of the rectifying ring plate; the side wall of the rectifying ring plate is provided with a rectifying ring plate orifice; the part of the bottom plate, which is positioned between the inner side of the rectifying ring plate and the outer side of the second through hole, is provided with a sieve pore in the mixing box, and the part of the bottom plate, which is positioned on the outer side of the rectifying ring plate, is provided with a sieve pore outside the mixing box;
the feeding rotating plate is higher than the annular feeding boss in height, and a liquid blocking circular plate is fixedly arranged on the upper surface of the feeding rotating plate.
Preferably, the upper end of the rectifying ring plate is fixedly mounted at the bottom of the top plate, and the lower end of the rectifying ring plate is fixedly mounted at the upper part of the bottom plate.
As the optimization of the technical scheme of the invention, the feeding rotating plate is an arc-shaped vertical plate.
As the preferable choice of the technical scheme of the invention, the mixing rotating plate is an arc-shaped vertical plate.
As the preferable mode of the technical scheme of the invention, the arc bending direction of the feeding rotating plate is opposite to that of the mixing rotating plate.
Preferably, the orifice of the rectifying ring plate is one or more of triangle, square or circle.
As the preferable technical scheme of the invention, the number of orifices of the rectifying ring plates is 48-80, and the number of the feeding rotating plates and the mixing rotating plates is 4-8.
As the optimization of the technical scheme of the invention, the opening rates of the sieve holes in the mixing box and the sieve holes outside the mixing box are 5-20%, and the opening sizes are 6-18 mm.
Preferably, the open density of the sieve holes in the mixing box is smaller than that of the sieve holes outside the mixing box.
As a preference of the technical proposal of the invention, both the top plate and the bottom plate are fixedly arranged on the reactor wall.
Compared with the prior art, the invention has the following beneficial effects:
the novel cyclone quenching tank mainly comprises a top plate, an annular feeding boss, a feeding rotating plate, a mixing rotating plate, a bottom plate and other parts, and is novel and simple in structure. In the quenching tank, the hot reactant flow from the upper catalyst bed layer and the added cold medium are firstly gathered and premixed on the top plate, and when the liquid phase is accumulated to a certain thickness on the top plate, the liquid phase passes through the annular feeding boss, is guided and accelerated by the feeding rotating plate, and enters the mixing tank through the throttle hole. Compared with the prior quenching box, the feeding rotating plate is additionally arranged on the top plate, the mixing rotating plate is additionally arranged in the mixing box, the length of the flow channel is increased, the contact time of gas phase and liquid phase is prolonged to a great extent, and the mixing and heat transfer effects are improved, so that the radial temperature difference of the inlet of the lower catalyst bed layer can be reduced, and the full play of the catalyst performance is facilitated.
Drawings
FIG. 1 is a schematic diagram of a novel cyclone quench tank in accordance with the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic perspective view of the upper part of the novel cyclone quenching tank;
fig. 5 is a schematic perspective view of the structure of the middle and lower part of the novel cyclone quenching tank.
Wherein, 1, top plate; 2. a liquid blocking circular plate; 3. an annular feed boss; 4. a feed orifice; 5. a feeding rotating plate; 6. a rectifying ring plate; 7. orifice of rectifying ring plate; 8. screen holes in the mixing box; 9. a mixing box; 10. mixing a rotating plate; 11. sieve holes outside the mixing box; 12. a bottom plate; 13. reactor walls.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
Referring to fig. 1 to 5, the invention provides a novel cyclone quenching tank, which comprises a top plate 1, a bottom plate 12 and a mixing tank 9, wherein the top plate 1 and the bottom plate 12 are arranged in an up-down separation mode, and the mixing tank 1, the mixing tank 9 and the bottom plate 12 are arranged in a central symmetry mode; a hollow annular feeding boss 3 is arranged on the top plate 1, a feeding throttle hole 4 is formed in the middle of the top plate 1, a first through hole (not numbered in the figure) corresponding to the feeding throttle hole 4 is formed in the middle of the annular feeding boss 3, and a feeding rotating plate 5 is radially arranged between the outer side of the first through hole and the inner wall of the annular feeding boss 3; a second through hole (not numbered in the figure) corresponding to the feeding throttle hole 4 is formed in the middle of the mixing box 9, a hollow cylindrical rectifying ring plate 6 is further arranged in the mixing box 9, and a mixing rotating plate 10 is radially arranged between the outer side of the second through hole and the inner wall of the rectifying ring plate 6; the side wall of the rectifying ring plate 6 is provided with a rectifying ring plate orifice 7; the part of the bottom plate 12 between the inner side of the rectifying ring plate 6 and the outer side of the second through hole is provided with a mixing box inner sieve hole 8, and the part of the bottom plate 12 outside the rectifying ring plate 6 is provided with a mixing box outer sieve hole 11;
the height of the feeding rotating plate 5 is higher than that of the annular feeding boss 3, and a liquid blocking circular plate 2 is fixedly arranged on the upper surface of the feeding rotating plate 5.
In the technical scheme, the quenching box is of a central symmetry structure. The first through hole, the feeding throttle hole 4 and the second through hole are all arranged in the middle of the quenching tank and are communicated with each other, so that the circulation of cold and hot mixture flows is facilitated; through the arrangement of the annular feeding boss 3, the height of the feeding rotating plate 5 is limited to be higher than that of the annular feeding boss 3, a circulation channel is formed between the annular feeding boss 3 and the liquid blocking circular plate 2, and cold and hot logistics are convenient to overflow into the mixing box 9 through the annular feeding boss after being fully mixed on the top plate 1; the feeding rotary plate 5 is arranged and is used for guiding and accelerating the cold and hot mixed materials; the feeding throttle hole 4 is arranged and is used for enabling the flow speed of the cold and hot mixed materials to be increased sharply through throttling; the part of the bottom plate 12 between the inner side of the rectifying ring plate 6 and the outer side of the second through holes is provided with a mixing box inner sieve hole 8, the part of the bottom plate 12 outside the rectifying ring plate 6 is provided with a mixing box outer sieve hole 11, and the arrangement is such that no hole (corresponding region C) is formed in the region of the bottom plate 12 corresponding to the lower part of the second through holes, cold and hot mixed materials can rebound and splash on the bottom plate 12 after entering through the second through holes to generate vortexes, liquid phase materials are carried by gas phase materials and are broken into small liquid drops, then the small liquid drops are further swirled and mixed along the mixing rotating plate 10, and a part of the mixed materials flow out of the quenching box approximately uniformly through the mixing box inner sieve hole 8 (corresponding region D); the other part of the mixture flow hits the rectifying ring plate 6 at high speed, and is flushed out of the mixing box 9 through the rectifying ring plate orifice 7 on the rectifying ring plate 6, is more uniformly distributed on the open pore area F outside the mixing box 9, and finally flows out of the quenching box through the mixing box outer sieve holes 11 on the area F.
In some embodiments, both the top plate 1 and the bottom plate 12 are fixedly mounted on the reactor wall 13, by which the quench tank is fixed.
In some embodiments, the upper end of the rectifying ring plate 6 is fixedly mounted to the bottom of the top plate 1, and the lower end of the rectifying ring plate 6 is fixedly mounted to the upper portion of the bottom plate 12. It will be appreciated that the form of its fixed mounting may be of various forms common to welding and the like, and is a routine choice for a person skilled in the art.
In some embodiments, the feed screw 5 is an arcuate riser; in some embodiments, the mixing rotor 10 is an arcuate riser.
In some embodiments, the feeding rotating plate 5 and the mixing rotating plate 10 are curved in opposite directions, so that the effect of mixing the cold and hot mixed materials can be further enhanced.
In some embodiments, the shape of the fairing ring orifice 7 is one or more of triangular, square, or circular; preferably circular. It will be appreciated that the orifice 7 of the flow straightening ring plate may be correspondingly formed according to needs, and is not particularly limited in this embodiment.
In some embodiments, the number of the orifice holes 7 of the fairing ring plate is 48-80; it can be understood that the number of the orifice holes 7 of the rectifying ring plate can be flexibly selected according to actual requirements; preferably, the number of orifice holes 7 of the flow straightening ring plate is 80.
The number of the feeding rotating plates 5 and the number of the mixing rotating plates 10 are 4-8. It will be appreciated that the feed screw plate 5 may be 4, 5, 6, 7 or 8; the number of mixing rotor plates 10 can likewise be 4, 5, 6, 7 or 8; the specific number of the two can be flexibly selected according to actual requirements; preferably, the number of feed screw plates 5 and mixing screw plates 10 is equal, both being 8.
In some embodiments, the openings of the inner sieve holes 8 and the outer sieve holes 11 of the mixing box are 5-20%, and the opening sizes are 6-18 mm. It is understood that the aperture ratio and the size of the openings can be set according to actual needs.
In some embodiments, the open cell density of the in-box screen 8 is less than the open cell density of the out-box screen 11. The arrangement is that the sieve holes 8 in the mixing box with small open pore density can slow down the downward flowing of the fluid out of the mixing box, and the mixing time is prolonged; the mixing box outer screen holes 11 with large open hole density can enable fluid to flow to the next bed layer more smoothly, and pressure drop is reduced.
With further reference to fig. 1-3, the overall workflow and principles of the quench tank of the present invention will be described in detail: after the quench box has been assembled and fixedly mounted on the reactor wall 13 as described above, operation is initiated. The hot reactant stream from the upper catalyst bed above the quench box is first collected and premixed with the added cold medium on top plate 1, and when the liquid phase builds up to a certain thickness on top plate 1, it passes over annular feed boss 3, under the action of feed screw plate 5, the mixture stream begins to spin up, and then enters mixing box 9 through feed orifice 4. The mixture stream vigorously impacts the central non-perforated area C of the mixing box 9 due to sudden throttling and rapid flow velocity, bouncing and splashing on the bottom plate 12, generating a vortex; the liquid phase material flow is carried by the gas phase material flow and crushed into small liquid drops, then the small liquid drops are further swirled and mixed along a mixing rotary plate 10, and a part of the mixture flows out of the quenching tank approximately uniformly through the sieve holes 8 in the mixing tank on the opening area D in the mixing tank; the other part of the mixture flow hits the rectifying ring plate 6 at high speed, and rushes out of the mixing box 9 through the rectifying ring plate orifice 7 on the rectifying ring plate 6, is more uniformly distributed on the mixing box outer opening area F, and finally flows out of the quenching box through the mixing box outer sieve holes 11 on the area F.
The novel cyclone quenching tank is further described below by referring to specific embodiments.
Example 1
In the specific embodiment, a novel cyclone quenching tank is provided, which comprises a top plate 1, a bottom plate 12 and a mixing tank 9, wherein the top plate 1 and the bottom plate 12 are arranged in an up-down separation mode, the mixing tank 9 and the bottom plate 12 are arranged in a central symmetry mode; a hollow annular feeding boss 3 is arranged on the top plate 1, a feeding throttle hole 4 is formed in the middle of the top plate 1, a first through hole corresponding to the feeding throttle hole 4 is formed in the middle of the annular feeding boss 3, and a feeding rotating plate 5 is radially arranged between the outer side of the first through hole and the inner wall of the annular feeding boss 3; a second through hole corresponding to the feeding throttle hole 4 is formed in the middle of the mixing box 9, a hollow cylindrical rectifying ring plate 6 is further arranged in the mixing box 9, and a mixing rotating plate 10 is radially arranged between the outer side of the second through hole and the inner wall of the rectifying ring plate 6; the side wall of the rectifying ring plate 6 is provided with a rectifying ring plate orifice 7; the part of the bottom plate 12 between the inner side of the rectifying ring plate 6 and the outer side of the second through hole is provided with a mixing box inner sieve hole 8, and the part of the bottom plate 12 outside the rectifying ring plate 6 is provided with a mixing box outer sieve hole 11. The quenching box is fixedly arranged on the reactor wall 13 through a top plate 1 and a bottom plate 12;
the height of the feeding rotating plate 5 is higher than that of the annular feeding boss 3, and a liquid blocking circular plate 2 is fixedly arranged on the upper surface of the feeding rotating plate 5.
In this embodiment, the upper end of the rectifying ring plate 6 is fixedly mounted at the bottom of the top plate 1, and the lower end of the rectifying ring plate 6 is fixedly mounted at the upper portion of the bottom plate 12.
In this embodiment, the feeding rotating plate 5 and the mixing rotating plate 10 are arc-shaped vertical plates, and the arc bending directions of the two are opposite.
In this embodiment, the orifice 7 of the rectifying ring plate is circular in shape, and the number of the orifice is 80.
In this embodiment, the number of the feeding spin plates 5 and the mixing spin plates 10 is 8.
In the specific embodiment, the opening size of the sieve holes 8 in the mixing box is 8mm, and the opening ratio is 7%; the opening size of the sieve holes 11 outside the mixing box is 8mm, and the opening ratio is 12%.
Because this novel whirl quenching tank has add feeding whirl board 5 and has add mixing whirl board 10 and rectification annular plate 6 in the mixing box on roof 1, not only prolonged the dwell time of mixture flow in novel whirl quenching tank greatly under the combined action of these three, the mixture flow has throttle, collision and whirl many times in addition, these all are favorable to hot reactant flow and the cold medium intensive mixing of adding, heat transfer, evenly distributed to lower floor's catalyst bed.
The technical idea of the present invention is described by the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must be implemented depending on the above embodiments. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of individual raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
Claims (10)
1. The novel cyclone quenching tank is characterized by comprising a top plate (1) and a bottom plate (12) which are arranged in an up-down separation mode and a mixing tank (9) formed between the top plate and the bottom plate, wherein the top plate (1), the mixing tank (9) and the bottom plate (12) are arranged in a central symmetry mode; a hollow annular feeding boss (3) is arranged on the top plate (1), a feeding throttling hole (4) is formed in the middle of the top plate (1), a first through hole corresponding to the feeding throttling hole (4) is formed in the middle of the annular feeding boss (3), and a feeding rotating plate (5) is radially arranged between the outer side of the first through hole and the inner wall of the annular feeding boss (3); a second through hole corresponding to the feeding throttle hole (4) is formed in the middle of the mixing box (9), a hollow cylindrical rectifying ring plate (6) is further arranged in the mixing box (9), and a mixing rotating plate (10) is radially arranged between the outer side of the second through hole and the inner wall of the rectifying ring plate (6); the side wall of the rectifying ring plate (6) is provided with a rectifying ring plate orifice (7); the part of the bottom plate (12) between the inner side of the rectifying ring plate (6) and the outer side of the second through hole is provided with a mixing box inner sieve hole (8), and the part of the bottom plate (12) outside the rectifying ring plate (6) is provided with a mixing box outer sieve hole (11);
the feeding rotary plate (5) is higher than the annular feeding boss (3), and a liquid blocking circular plate (2) is fixedly arranged on the upper surface of the feeding rotary plate (5).
2. The novel cyclone quenching tank according to claim 1, wherein the upper end of the rectifying ring plate (6) is fixedly arranged at the bottom of the top plate (1), and the lower end of the rectifying ring plate (6) is fixedly arranged at the upper part of the bottom plate (12).
3. The novel cyclone quenching tank as claimed in claim 1, wherein the feeding rotating plate (5) is an arc-shaped vertical plate.
4. A novel cyclone quenching tank as claimed in claim 1, wherein the mixing spin plate (10) is an arc-shaped vertical plate.
5. The novel cyclone quenching tank as claimed in claim 4, wherein the feeding rotating plate (5) and the mixing rotating plate (10) are in opposite arc bending directions.
6. A novel cyclone quenching tank as claimed in claim 1, wherein the orifice (7) of the rectifying ring plate is one or more of triangular, square or circular.
7. The novel cyclone quenching tank according to claim 1, wherein the number of orifices (7) of the rectifying ring plates is 48-80, and the number of the feeding rotating plates (5) and the mixing rotating plates (10) is 4-8.
8. The novel cyclone quenching tank as claimed in claim 1, wherein the opening ratio of the inner sieve holes (8) and the outer sieve holes (11) of the mixing tank is 5-20%, and the opening sizes are 6-18 mm.
9. A novel cyclone quench box according to claim 8, characterized in that the open pore density of the holes (8) in the mixing box is smaller than the open pore density of the holes (11) outside the mixing box.
10. A novel cyclone quenching box as claimed in any of claims 1 to 9, characterized in that the top plate (1) and the bottom plate (12) are fixedly mounted on the reactor wall (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310421860.1A CN116492936A (en) | 2023-04-19 | 2023-04-19 | Novel rotational flow quenching box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310421860.1A CN116492936A (en) | 2023-04-19 | 2023-04-19 | Novel rotational flow quenching box |
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| CN116492936A true CN116492936A (en) | 2023-07-28 |
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| CN202310421860.1A Pending CN116492936A (en) | 2023-04-19 | 2023-04-19 | Novel rotational flow quenching box |
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