CN115155352A - Mixer for mixing ethylene and oxygen - Google Patents
Mixer for mixing ethylene and oxygen Download PDFInfo
- Publication number
- CN115155352A CN115155352A CN202210655659.5A CN202210655659A CN115155352A CN 115155352 A CN115155352 A CN 115155352A CN 202210655659 A CN202210655659 A CN 202210655659A CN 115155352 A CN115155352 A CN 115155352A
- Authority
- CN
- China
- Prior art keywords
- ethylene
- oxygen
- outer cylinder
- distribution plate
- feeding area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000005977 Ethylene Substances 0.000 title claims abstract description 177
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 173
- 239000001301 oxygen Substances 0.000 title claims abstract description 168
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 168
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 165
- 238000009826 distribution Methods 0.000 claims abstract description 78
- 239000006185 dispersion Substances 0.000 claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 38
- 239000007924 injection Substances 0.000 claims description 38
- 239000007789 gas Substances 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 13
- 239000012530 fluid Substances 0.000 description 13
- 238000004880 explosion Methods 0.000 description 12
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- XENVCRGQTABGKY-ZHACJKMWSA-N chlorohydrin Chemical compound CC#CC#CC#CC#C\C=C\C(Cl)CO XENVCRGQTABGKY-ZHACJKMWSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical compound C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 description 1
- 229960001231 choline Drugs 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/60—Safety arrangements
- B01F35/605—Safety devices concerning the operation of the mixer
- B01F35/6052—Safety devices concerning the operation of the mixer with locking, blocking or interlocking mechanisms for preventing operation of the actuation mechanism of the mixing device
Abstract
The invention discloses a mixer for mixing ethylene and oxygen, which comprises an outer cylinder, a layered partition plate, a distribution plate, a jet ring, an ethylene inlet, an oxygen inlet and a dispersion cylinder, wherein the outer cylinder is provided with a plurality of layers; the jet ring is fixed on the distribution plate; a feeding area is formed between the distribution plate and the closed end of the outer cylinder body, a distribution area is formed in the outer cylinder body where the distribution plate and the spray ring are positioned, and a jet flow mixing area is formed between the spray ring and the open end of the outer cylinder body; the layered partition plate divides the feeding area into an ethylene feeding area and an oxygen feeding area which are respectively connected with the ethylene inlet and the oxygen inlet; the distribution plate and the jet ring divide the distribution area into an ethylene annular channel and an oxygen annular channel which are alternately arranged from outside to inside; the distribution plate in the ethylene feeding area is provided with ethylene channel holes corresponding to the corresponding ethylene annular channels; oxygen channel holes are arranged on the distribution plate in the oxygen feeding area and correspond to the corresponding oxygen annular channels, and jet holes are arranged on the wall of the dispersion barrel. The invention can uniformly mix ethylene and oxygen, and is safe and reliable.
Description
Technical Field
The invention belongs to the technical field of mixing equipment, and particularly relates to a mixer for mixing ethylene and oxygen.
Background
Ethylene Oxide (EO) is an important chemical product next to polyethylene in downstream derivatives of ethylene industry, has wide application field, is mainly used for producing fine chemical products such as nonionic surfactants, ethanol glue, glycol vinegar, polyase polyol, choline oxide, medicines and the like, and can also be used as a sterilizing agent of medical equipment such as food, cosmetics, surgical equipment and the like. The downstream products of ethylene oxide can reach more than 6000 types, and the production has wide prospect.
The industrial production technology of ethylene oxide mainly comprises a chlorohydrin method and an ethylene direct oxidation method, wherein the chlorohydrin method is taken as a main method in the early stage, and because chlorine is used in the production process of the chlorohydrin method and a large amount of hydrogen chloride is generated, the corrosion damage to equipment, buildings and auxiliary facilities is serious, in addition, waste water, waste gas and waste materials are difficult to treat, and the chlorohydrin method is basically replaced by the ethylene direct oxidation method. The direct oxidation of ethylene can be classified into air oxidation and oxygen oxidation according to the difference of the oxidant, the air oxidation generally has a low operation cost, a good catalyst selectivity, but a high investment and a low conversion rate, and the current mainstream production method is the oxygen oxidation, and ethylene oxide is synthesized by the reaction of ethylene and oxygen. At this time, the mixing of ethylene and oxygen must be completed before the reaction, but ethylene is flammable and explosive, has a wide explosion range, and is extremely dangerous if the control is improper, so the mixing of ethylene and oxygen is a key process and equipment for producing ethylene oxide.
The mixing methods commonly used in the current industrial production mainly include stirring mixing, static mixer mixing, and jet mixing. The stirring and mixing mainly uses external mechanical energy modes such as mechanical stirring and the like to strengthen the macro mixing of the fluid, but chemical products are often inflammable, explosive, highly toxic and easy to react when heated, the mechanical stirring is likely to provide sparks and heat required by combustion, and moving parts are difficult to seal and easy to leak, so the stirring and mixing are difficult to be used for mixing ethylene and oxygen. The static mixer is generally provided with a baffle plate or other structures in a mixer or a pipeline to disturb fluid flow, increase the velocity gradient of laminar flow movement of the fluid or form turbulent flow, and realize mixing of the material flow, but the explosion range of mixing of ethylene and oxygen is wide, the mixing proportion in the static mixer is difficult to control, and accurate mixing of ethylene and oxygen is difficult to realize, so that the static mixer is also difficult to be used for mixing of ethylene and oxygen.
Jet mixing utilizes the high-speed jet entrainment effect by injecting a fast moving fluid (i.e., the jet) into a slow flowing or stationary fluid (i.e., the primary fluid) to form a mixed layer at the jet boundary due to the velocity difference between the jet and the primary fluid. The mixing layer is expanded along the flow direction of the jet flow, and the main fluid enters the jet flow through entrainment and mixing, so that the two fluids are uniformly mixed. The mixing mode in industrial production is formed due to the advantages of simple structure, no rotating parts, reliable work, violent mixing, high mass and heat transfer rate and the like.
At present, an ethylene-oxygen mixer applied in the industry is usually in a mixing mode of feeding from the side surface of a main stream and feeding from a tube array by jet flow, and the jet flow is single-point jet on the whole, so that the jet flow is not uniform in the circumferential direction and has poor jet flow mixing effect; the main flow laterally enters the mixer, then the flow direction is changed, the flow in the mixer is uneven, the impact on the tube array is large, the tube array is easy to break, the structural design is unreasonable, and the improvement is needed continuously.
Patent CN 105214528A discloses a mixer for olefin and oxygen, mainly comprising a plurality of oxygen dispersing pipes symmetrically arranged at the end of an oxygen pipeline, each oxygen dispersing pipe being uniformly distributed with a plurality of oxygen dispersing holes, the oxygen pipeline being communicated with a mixing chamber through the oxygen dispersing holes. However, in the cross section of the olefin pipe, the oxygen dispersion holes are dense at the center of the pipe and sparse near the wall surface. The concentration of oxygen at the center of the main pipe in the mixing process is possibly higher than that near the wall surface, the mixing is not uniform, the mixing effect is influenced, and safety accidents are easily caused.
Patent CN 108310989B discloses a rapid mixing equipment of ethylene and oxygen, lays a plurality of oxygen spiral distribution pipes in the mixing chamber, and the spiral distribution pipe plane is perpendicular with ethylene flow direction, and evenly distributed a plurality of oxygen nozzles on every spiral distribution pipe, the nozzle direction is unanimous with ethylene flow direction, and the ethylene that gets into from the sprue mixes at the mixing area rapid mixing with the oxygen that spiral distribution pipe nozzle erupted, has solved the mixture of ethylene and oxygen betterly. However, since the oxygen feeding pipeline is divided into a plurality of branch distribution pipes in the main pipeline and enters the main ethylene pipe, oxygen in each oxygen branch pipe may be different, which may cause uneven mixing of oxygen in the mixing area, affect the mixing effect and easily cause safety accidents.
In conclusion, the mixing of ethylene and oxygen is an important production link, the danger is extremely high when the ethylene and oxygen pass through an explosion region in the mixing process, and the ethylene and oxygen must be uniformly mixed and far away from the explosion region during the mixing. The prior jet mixing technology has the technical problems of uneven mixing and easy safety accidents, and needs further improvement.
Disclosure of Invention
In order to solve the technical problems of uneven mixing and easy safety accidents in the prior art, the invention provides a mixer for mixing ethylene and oxygen, so that the ethylene and the oxygen quickly pass through an explosion region in the mixing process, and are uniformly mixed and then far away from the explosion region, thereby achieving the purpose of safety.
The mixer for mixing ethylene and oxygen provided by the invention comprises an outer cylinder body, a layering partition plate, a distribution plate, a jet ring, an ethylene inlet, an oxygen inlet and a dispersion cylinder; the outer cylinder body is cylindrical, one end of the outer cylinder body is closed, and the other end of the outer cylinder body is open; the injection ring is cylindrical with two open ends; the distribution plate is fixed in the outer cylinder, one end of the injection ring is fixed on the distribution plate along the axis of the outer cylinder and is coaxial with the outer cylinder; a space between the distribution plate and the closed end of the outer cylinder body forms a feeding area, a space in the outer cylinder body where the distribution plate and the injection ring are located forms a distribution area, and a space between the injection ring and the open end of the outer cylinder body forms a jet flow mixing area; the layered partition plate is positioned in the feeding area, is vertically fixed on the distribution plate along the axis of the outer cylinder, and divides the feeding area into an ethylene feeding area and an oxygen feeding area, the ethylene inlet is connected with the ethylene feeding area, and the oxygen inlet is connected with the oxygen feeding area; the distribution area is divided into annular channels with the diameters from large to small from outside to inside along the radial direction of the outer cylinder body by the distribution plate and the injection ring, the annular channels are divided into an ethylene annular channel and an oxygen annular channel, and the ethylene annular channel and the oxygen annular channel are alternately arranged from outside to inside along the radial direction of the outer cylinder body; ethylene channel holes are formed in the distribution plate in the ethylene feeding area and correspond to the corresponding ethylene annular channels; oxygen channel holes are formed in the distribution plate in the oxygen feeding area and correspond to the corresponding oxygen annular channels; the dispersing cylinder is arranged in the jet flow mixing area and is coaxial with the outer cylinder body, the upstream end of the dispersing cylinder is opened to form an open end of the dispersing cylinder, the downstream end of the dispersing cylinder is closed by a seal head to form a closed end of the dispersing cylinder, and the wall of the dispersing cylinder is provided with a jet hole.
The specific number of the injection rings can be determined according to the actual working condition, and is preferably 2 to 12, and preferably 3 to 8. The large spray ring is sleeved with the small spray ring, and the small spray ring is nested layer by layer along the radial direction of the outer cylinder body and is arranged coaxially with the outer cylinder body.
The outer cylinder body can be composed of a shell and an end enclosure, and the closed end of the outer cylinder body can be closed in the form of the end enclosure or a flange cover and the like; the open end of the outer cylinder body is used for the mixed gas to enter the subsequent flow; the outer cylinder is preferably a cylinder with a diameter of 200-3000 mm for the purposes of easy manufacture and uniform distribution due to central symmetry.
The number of the layered partition plates can be determined according to the actual working condition, preferably 2 to 6, and preferably 3 to 5. The layered partition plate and the distribution plate divide the feeding area of the outer cylinder into an ethylene feeding area and an oxygen feeding area, the two feeding areas are alternately arranged along the circumferential direction of the outer cylinder, and each ethylene feeding area and each oxygen feeding area are closed areas; each closed area is strictly sealed, and material fleeing is forbidden; and a corresponding ethylene inlet or oxygen inlet is arranged on the corresponding outer cylinder of each closed area for external oxygen or ethylene to enter. The number of the layered clapboards is increased, the number of the ethylene feeding area and the oxygen feeding area can be increased, the rapid and uniform diffusion of ethylene and oxygen in the distribution area in respective annular channels is promoted, the maximum distance of annular diffusion is reduced, the uniformity of ethylene and oxygen in respective annular channels is increased, and the rectification length and the injection ring length are shortened.
Because the distribution plate of the ethylene feeding area is only provided with ethylene channel holes corresponding to the ethylene annular channels, and the distribution plate of the oxygen feeding area is only provided with oxygen channel holes corresponding to the oxygen annular channels, ethylene and oxygen enter the respective annular channels through the respective channel holes and are not mixed with each other, so as to carry out subsequent jet mixing.
The injection ring and the two sides of the distribution plate are sealed in reliable modes such as welding, bonding and the like, and the ethylene and oxygen have wide explosion range and extremely high danger, so that the mixing equipment needs to be sealed well. Generally, the sealing of the injection ring and the distribution plate should ensure that the oxygen is only delivered to the jet mixing zone in the oxygen annular channel, does not enter the ethylene annular channel and cannot diffuse to the ethylene area at the front end of the ethylene annular channel; ethylene does not enter the oxygen annular channel, is only conveyed to the jet flow mixing area in the ethylene annular channel, and does not spread to the oxygen area at the front end of the oxygen annular channel, so that the intrinsic safety of the mixing equipment is ensured.
In order to ensure that the ethylene and the oxygen form jet flow mixing, the ethylene annular channels and the oxygen annular channels are alternately arranged, and the radial width of the ethylene annular channels is larger than that of the oxygen annular channels.
As a modification, the annular channel at the outermost ring of the distribution area is an ethylene annular channel.
The determination of the length of the spray ring may take into account two aspects:
on one hand, after oxygen enters the oxygen annular channel from the oxygen channel holes on the distribution plate, the oxygen is firstly diffused to the area without oxygen directly entering the oxygen annular channel, and when the oxygen is uniformly distributed in the oxygen annular channel, the oxygen enters the jet flow mixing area. The oxygen annular channel plays a role in guiding oxygen, rectifying oxygen and annularly and uniformly distributing the oxygen in the oxygen annular channel, so that the injection ring is required to have a certain axial length;
on the other hand, after entering the ethylene annular channel from the ethylene channel hole on the distribution plate, ethylene diffuses to the area where no ethylene directly enters in the ethylene annular channel, and after being uniformly distributed in the ethylene annular channel, ethylene enters the jet flow mixing area. The injection ring rectifies the ethylene in the circumferential direction, so that the ethylene is uniformly distributed in the annular ethylene channel in the circumferential direction, and the injection ring is required to have a certain axial length;
the final length of the spray ring is taken to be the maximum of the two determined lengths and a certain margin is reserved in order to provide greater operational flexibility.
As a further improvement, in order to shorten the rectification length of the injection ring to the ethylene in the distribution area, promote the ethylene to diffuse to the ethylene annular channel area without direct feeding of the ethylene, and reduce the length of the injection ring and the mixing equipment, an ethylene baffle plate can be continuously or discontinuously arranged on the inner wall of the part, corresponding to the ethylene channel hole, in the ethylene annular channel, wherein the height of the ethylene baffle plate is less than the radial width of the ethylene annular channel, preferably less than 1/2 of the radial width of the ethylene annular channel, so as to increase the flow resistance of the ethylene after entering the ethylene annular channel, promote the ethylene to flow to the position of the ethylene annular channel without directly opening the ethylene channel hole, and ensure that the ethylene is uniformly distributed in the annular channel in a shorter distance.
When ethylene and oxygen are rectified by the jet ring and uniformly distributed in the respective annular channels, the ethylene and the oxygen enter a jet flow mixing zone. The total area of the cross section of the oxygen annular channel is smaller than the total area of the oxygen inlet, the conveying speed of oxygen in the oxygen annular channel is increased and can reach 20-100 m/s, the rapidly moving oxygen fluid is injected into a relatively low-speed main fluid, namely ethylene flow, at the jet flow boundary, a mixed layer is formed due to the speed difference between the oxygen jet flow and the ethylene main fluid, the mixed layer is expanded along the flow direction of the oxygen jet flow, and the main fluid ethylene enters the oxygen jet flow through entrainment and mixing, so that the purposes of rapidly passing through an explosion range and rapidly mixing are achieved. When the size of the annular channel, the position of the injection ring and the position of the ethylene channel hole are designed, the oxygen sprayed from different oxygen annular channels cannot intersect and impact the wall surface within a certain distance, so that the mixing ratio of the oxygen and the ethylene is controlled, and explosion is avoided. In the jet mixing zone, the ethylene and oxygen are firstly mixed by jet, the oxygen quickly passes through the explosion danger zone, and then is further mixed by the dispersing cylinder, and the mixture is far away from the explosion range and leaves the mixing equipment.
The dispersing cylinder is preferably cylindrical, and the closed end socket can be flat, conical or spherical. The closed end sealing head is not provided with a hole, all mixed gas entering the dispersing cylinder leaves from the spraying hole of the cylinder wall of the dispersing cylinder and is mixed with gas not entering the dispersing cylinder in an annular area between the dispersing cylinder and the cylinder wall of the outer cylinder body, and the mixing effect can be greatly enhanced and improved. Of course, the closed end can also adopt a local blocking form, namely, the closed end sealing head can also be provided with a jet hole, when the jet hole is arranged on the sealing head, part of mixed gas entering the dispersing cylinder can be directly sprayed out from the sealing head, the mixing intensity of the gas in the jet mixing area can be weakened, the mixing effect can be reduced, and if the opening ratio of the sealing head is larger, the more the mixing effect is reduced.
When the dispersion cylinder is cylindrical, the diameter is preferably 40% to 80% of the diameter of the outer cylinder. The spraying holes on the wall of the dispersing cylinder and the end enclosure are uniformly distributed along the circumferential direction of the pipe wall, can be round holes, can also be strip seams or other shapes, and from the angle of convenient processing, the spraying holes are preferably round holes, and the diameter of the round holes is 2-40 mm, preferably 4-30 mm. The mixed gas in the dispersing cylinder is sprayed out from the spraying holes and is in staggered contact with the mixed gas in the ring flowing from front to back to be fully mixed.
As a further proposal, in order to make the gas flow in the mixer smoother, the jet holes on the wall of the dispersing cylinder are preferably opened from inside to outside along the gas flow direction, so that the gas in the cylinder is injected into the gas flow outside the cylinder, and the included angle between the opening direction and the axis of the dispersing cylinder is preferably 10-70 degrees, and preferably 30-60 degrees.
As a further proposal, the hole opening rate of the injection holes on the wall of the dispersion cylinder is gradually reduced from front to back along the axis of the cylinder wall, and the hole opening size is gradually reduced. Therefore, the pressure drop can be reduced on the basis of ensuring the mixing effect, most of the gas in the cylinder is sprayed out from the front end of the dispersing cylinder, the pressure drop is small, the contact time with the gas outside the dispersing cylinder is long, and the mixing effect is improved; a small part of the gas in the cylinder is sprayed out from the rear end, the spraying speed is high, and the mixing effect is enhanced by the speed difference.
The dispersing cylinder is fixedly connected with the inner wall of the outer cylinder body through the supporting columns. The fixed connection mode can adopt a detachable connection mode or a non-detachable connection mode. The detachable connection mode can be realized by additionally arranging bolts, threads, clamping grooves, hoops or lantern rings and the like; the non-detachable connection mode can be realized by welding, riveting and the like. The number of the supporting columns can be set to be one or two or more according to actual conditions. If a detachable connection mode is adopted, the dispersing cylinder can be taken out from the mixer, checked, cleaned or replaced in the shutdown and overhaul process of the device; if the non-detachable connection mode is adopted, the installation mode is simpler. If the mixer diameter is small or the mixer operating temperature is not high, it is recommended to use a non-detachable connection if the mixing medium is not likely to adhere to and block the dispersion cylinder and its injection holes.
As a further improvement, the mixer for mixing ethylene and oxygen can be provided with an electrostatic grounding device to eliminate the influence of static electricity on the mixing process, prevent static electricity accumulation, increase the safety of mixing equipment and increase the intrinsic safety.
As a further improvement, in consideration of the extremely high danger of the mixing equipment, a blast wall can be arranged outside the mixer for mixing ethylene and oxygen, so that the loss of extreme accident conditions is reduced to the minimum.
As a further improvement, in view of the extremely high risk of the mixing equipment, the mixer for mixing ethylene with oxygen may be provided with an interlock control system which, when it is determined that the oxygen content at the point of measurement exceeds a standard, reduces the supply of oxygen or introduces an inert gas such as nitrogen from the oxygen inlet, keeping the mixing process away from the explosive limit.
The invention has the following beneficial effects:
1) By utilizing the injection and entrainment of high-speed oxygen, ethylene and oxygen are quickly mixed through the explosion limit, the physical domain and the time domain of the mixing process are reduced, and the aim of safe mixing is fulfilled;
2) The ethylene and the oxygen enter the mixing equipment in the same direction through the flow guide effect of the coaxially arranged multilayer injection rings, the oxygen is uniformly and continuously injected into the mixing equipment from the oxygen annular channels with different diameters, the uniform mixing is easy, and the operation elasticity is large; the accurate mixing of the ethylene and the oxygen is realized by setting the flow rate of the oxygen jet flow and the position of the jet flow;
3) By arranging the dispersing cylinder, the ethylene and the oxygen are mixed more fully in the jet flow mixing area, and the mixing effect is improved;
4) The safety of the mixing equipment is ensured through the static electricity eliminating device, the blast wall, the interlocking control system and the like.
Drawings
FIG. 1 is a schematic of one embodiment of the present invention;
FIG. 2 is a schematic view of the axial structure of the feed zone when the number of the pass partition plates is two.
FIG. 3 is a schematic view of the deployed configuration of the wall of the dispersion drum;
fig. 4 is a schematic view showing a structure of a fixed joint of the dispersing cylinder.
In the figure: the device comprises an A-feeding zone, a B-distribution zone, a C-jet mixing zone, a 1-outer cylinder, a 2-ethylene inlet, a 3-split partition, a 4-oxygen inlet, a 5-distribution plate, 6-oxygen channel holes, 7-ethylene channel holes, 8-ethylene baffles, 9-injection rings, 10-ethylene annular channels, 11-oxygen annular channels, 12-support columns, 13-dispersion cylinders and 14-injection holes.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention, as shown,
the mixer for mixing ethylene and oxygen comprises an outer cylinder body 1, a layered partition plate 3, a distribution plate 5, a jet ring 9, an ethylene inlet 2, an oxygen inlet 4 and a dispersion cylinder 13; the outer cylinder body 1 is cylindrical, the left end is closed, and the right end is open; the injection rings 9 are cylindrical with two open ends, and the number of the injection rings 9 is six; the distribution plate 5 is fixed on the inner wall of the outer cylinder 1, the left end of the injection ring 9 is welded on the distribution plate 5 along the axis of the outer cylinder 1 and is coaxially arranged with the outer cylinder 1, and the right end of the injection ring 9 is a free end; a space between the distribution plate 5 and the closed end, namely the left end, of the outer cylinder 1 forms a feeding area A, a space in the outer cylinder 1, where the distribution plate 5 and the jet ring 9 are located, forms a distribution area B, and a space between the jet ring 9 and the open end, namely the right end, of the outer cylinder 1 forms a jet mixing area C; the layered partition plate 3 is positioned in the feeding area A, is vertically fixed on the distribution plate 5 along the axis of the outer cylinder 1, and divides the feeding area A into an ethylene feeding area and an oxygen feeding area, the ethylene inlet 2 is connected with the ethylene feeding area, and the oxygen inlet 4 is connected with the oxygen feeding area; the distribution plate 5 and the injection ring 9 divide the distribution area B into seven annular channels with the diameters from large to small along the radial direction from outside to inside of the outer cylinder 1, the seven annular channels comprise four ethylene annular channels 10 and three oxygen annular channels 11, and the ethylene annular channels 10 and the oxygen annular channels 11 are alternately arranged along the radial direction from outside to inside of the outer cylinder 1; an ethylene channel hole 7 is formed in the distribution plate in the ethylene feeding area and corresponds to the corresponding ethylene annular channel 10; oxygen channel holes 6 are arranged on the distribution plate in the oxygen feeding area and correspond to the corresponding oxygen annular channels 11; in the feeding area A and the distribution area B, the ethylene and the oxygen are not mixed; the dispersing cylinder 13 is arranged in the jet mixing area C and is fixed on the inner wall of the outer cylinder body 1 through a support column 12, the cylinder wall of the dispersing cylinder 13 is provided with a jet hole 14, the seal head at the closed end of the dispersing cylinder 13 is conical, and the conical seal head is not provided with the jet hole. Of course, the dispersion cylinder end enclosure can also be provided with jet holes.
The ethylene baffle plate 8 is arranged on the inner wall of the part, corresponding to the ethylene channel hole 7, in the ethylene annular channel 10, and the height of the ethylene baffle plate 8 is smaller than the radial width of the ethylene annular channel 10, so that the flow resistance of ethylene entering the ethylene annular channel 10 is increased, the ethylene is promoted to flow to the position of the ethylene annular channel without directly opening the ethylene channel hole, and the ethylene is uniformly distributed in the annular channel in a shorter distance.
Fig. 2 is a schematic view of the axial structure of the feeding area when the number of the pass partition plates is two, as shown in the figure, the two layer partition plates 3 are vertically intersected to divide the feeding area into two ethylene feeding areas and two oxygen feeding areas, the two ethylene feeding areas correspond to two ethylene inlets 2, the two oxygen feeding areas correspond to two oxygen inlets 4, and the ethylene feeding areas and the oxygen feeding areas are alternately arranged along the circumferential direction of the distribution plate 5. The distribution plate 5 is a circular flat plate, and is provided with an oxygen passage hole 6 and an ethylene passage hole 7. The oxygen passage holes 6 are shown by hatching in the form of circular arcs having a narrow radial width, and the ethylene passage holes 7 are shown by hatching in the form of circular arcs having a wide radial width. The un-perforated area on the distribution plate 5 is a non-shadow area.
FIG. 3 is a schematic view showing the expanded structure of the wall of the dispersion drum, showing a distribution pattern of the injection holes 14, in which the hole opening ratio is gradually reduced from front to back along the axis of the wall of the dispersion drum, and the hole opening size is gradually reduced.
Fig. 4 is a schematic structural diagram of the fixed connection of the dispersing cylinder, and as can be seen, the dispersing cylinder 13 is fixedly connected to the inner wall of the outer cylinder body 1 through 3 support columns 12.
As shown in fig. 1 and 2, the present invention operates as follows:
ethylene enters an ethylene feeding area from an ethylene inlet 2, enters an ethylene annular channel 10 through ethylene channel holes 7 on a distribution plate 5, is diffused to an area where no ethylene directly enters in the ethylene annular channel 10, and enters a jet flow mixing area C after being uniformly distributed in the ethylene annular channel 10;
oxygen enters the oxygen feeding area from the oxygen inlet 4, enters the oxygen annular channel 11 through the oxygen channel holes 6 on the distribution plate 5, is diffused to the area where no oxygen directly enters in the oxygen annular channel 11, and enters the jet flow mixing area C after being uniformly distributed in the oxygen annular channel 11;
in jet mixing zone C, the ethylene and oxygen are first jet mixed and then further mixed by dispersion drum 13 to achieve the desired mixing effect.
Claims (14)
1. A mixer for mixing ethylene and oxygen, comprising: comprises an outer cylinder body, a layered clapboard, a distribution plate, a jet ring, an ethylene inlet, an oxygen inlet and a dispersion cylinder; the outer cylinder body is cylindrical, one end of the outer cylinder body is closed, and the other end of the outer cylinder body is open; the injection ring is cylindrical with two open ends; the distribution plate is fixed in the outer cylinder, one end of the injection ring is fixed on the distribution plate along the axis of the outer cylinder and is coaxial with the outer cylinder; a space between the distribution plate and the closed end of the outer cylinder body forms a feeding area, a space in the outer cylinder body where the distribution plate and the injection ring are located forms a distribution area, and a space between the injection ring and the open end of the outer cylinder body forms a jet flow mixing area; the layered partition plate is positioned in the feeding area, is vertically fixed on the distribution plate along the axis of the outer cylinder, and divides the feeding area into an ethylene feeding area and an oxygen feeding area, the ethylene inlet is connected with the ethylene feeding area, and the oxygen inlet is connected with the oxygen feeding area; the distribution plate and the injection ring divide a distribution area into annular channels with the diameters from large to small from outside to inside along the radial direction of the outer cylinder body, the annular channels are divided into an ethylene annular channel and an oxygen annular channel, and the ethylene annular channel and the oxygen annular channel are alternately arranged from outside to inside along the radial direction of the outer cylinder body; the distribution plate in the ethylene feeding area is provided with ethylene channel holes corresponding to the corresponding ethylene annular channels; oxygen channel holes are formed in the distribution plate in the oxygen feeding area and correspond to the corresponding oxygen annular channels; the dispersing cylinder is arranged in the jet flow mixing area and is coaxial with the outer cylinder body, the upstream end of the dispersing cylinder is opened to form an open end of the dispersing cylinder, the downstream end of the dispersing cylinder is closed by a seal head to form a closed end of the dispersing cylinder, and the wall of the dispersing cylinder is provided with a jet hole.
2. The mixer of claim 1, wherein: the number of the injection rings is 2-12.
3. The mixer of claim 1, wherein: the number of the layered partition boards is 2-6.
4. The mixer of claim 1, wherein: the ethylene feeding area and the oxygen feeding area are alternately arranged along the circumferential direction of the outer cylinder body.
5. The mixer of claim 1, wherein: the radial width of the ethylene annular channel is larger than that of the oxygen annular channel.
6. The mixer of claim 1, wherein: and an ethylene baffle is arranged on the inner wall of the part, corresponding to the ethylene channel hole, in the ethylene annular channel, and the height of the ethylene baffle is smaller than the radial width of the ethylene annular channel.
7. The mixer of claim 6, wherein: the height of the ethylene baffle is less than 1/2 of the radial width of the ethylene annular channel.
8. The mixer of claim 1, wherein: the annular channel at the outermost ring of the distribution area is an ethylene annular channel.
9. The mixer of claim 1, wherein: the hole opening rate of the spray holes in the wall of the dispersion cylinder is gradually reduced from front to back along the axis of the cylinder wall, and the hole opening size is gradually reduced.
10. The mixer of claim 1, wherein: the spraying holes on the wall of the dispersion barrel are arranged from inside to outside along the gas flowing direction.
11. A mixer according to any one of claims 1 to 10, wherein: also includes an electrostatic grounding device.
12. A mixer according to any one of claims 1 to 10, wherein: still include the blast wall of the outside setting of blender.
13. The mixer according to any one of claims 1 to 10, wherein: an interlock control system is also included.
14. A mixer for mixing ethylene and oxygen, comprising: comprises an outer cylinder body, a layering clapboard, a distribution plate, a jet ring, an ethylene inlet, an oxygen inlet and a dispersion cylinder; the outer cylinder body is cylindrical, one end of the outer cylinder body is closed, and the other end of the outer cylinder body is open; the injection ring is cylindrical with two open ends; the distribution plate is fixed in the outer cylinder, one end of the injection ring is fixed on the distribution plate along the axial line of the outer cylinder and is arranged coaxially with the outer cylinder; a space between the distribution plate and the closed end of the outer cylinder body forms a feeding area, a space in the outer cylinder body where the distribution plate and the injection ring are located forms a distribution area, and a space between the injection ring and the open end of the outer cylinder body forms a jet flow mixing area; the layered partition plate is positioned in the feeding area, is vertically fixed on the distribution plate along the axis of the outer cylinder, and divides the feeding area into an ethylene feeding area and an oxygen feeding area, the ethylene inlet is connected with the ethylene feeding area, and the oxygen inlet is connected with the oxygen feeding area; the distribution area is divided into annular channels with the diameters from large to small from outside to inside along the radial direction of the outer cylinder body by the distribution plate and the injection ring, the annular channels are divided into an ethylene annular channel and an oxygen annular channel, and the ethylene annular channel and the oxygen annular channel are alternately arranged from outside to inside along the radial direction of the outer cylinder body; the distribution plate in the ethylene feeding area is provided with ethylene channel holes corresponding to the corresponding ethylene annular channels; oxygen channel holes are formed in the distribution plate in the oxygen feeding area and correspond to the corresponding oxygen annular channels; the dispersing cylinder is arranged in the jet flow mixing area and is coaxial with the outer cylinder body, the upstream end of the dispersing cylinder is opened to form the opening end of the dispersing cylinder, the wall of the dispersing cylinder is provided with a jet hole, and the downstream end of the dispersing cylinder is partially blocked by an end enclosure provided with the jet hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210655659.5A CN115155352B (en) | 2022-06-10 | 2022-06-10 | Mixer for mixing ethylene and oxygen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210655659.5A CN115155352B (en) | 2022-06-10 | 2022-06-10 | Mixer for mixing ethylene and oxygen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115155352A true CN115155352A (en) | 2022-10-11 |
| CN115155352B CN115155352B (en) | 2023-11-24 |
Family
ID=83485280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210655659.5A Active CN115155352B (en) | 2022-06-10 | 2022-06-10 | Mixer for mixing ethylene and oxygen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115155352B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3525595A (en) * | 1967-05-19 | 1970-08-25 | Bayer Ag | Concentric cross flow nozzle apparatus for carrying out reactions between gases |
| GB1413996A (en) * | 1972-10-25 | 1975-11-12 | Texaco Development Corp | Synthesis gas generation |
| FI58014B (en) * | 1972-02-10 | 1980-07-31 | Blueray Systems Inc | SAETT ATT BRAENNA FLYTANDE KOLVAETEN I EN BRAENNARE OCH ANORDNING FOER UTFOERANDE AV SAETTET |
| EP0761298A2 (en) * | 1995-08-24 | 1997-03-12 | Praxair Technology, Inc. | Sparger for direct oxygen injection into a reactant stream for a fluidized bed reactor |
| JPH10249178A (en) * | 1997-03-14 | 1998-09-22 | Nippon Oil Co Ltd | Mixing deivce |
| US20060231645A1 (en) * | 2005-04-18 | 2006-10-19 | General Electric Company | Feed injector for gasification and related method |
| CN101612547A (en) * | 2009-07-28 | 2009-12-30 | 赛鼎工程有限公司 | Produce the shell and tube impact flow reactor and the operating system of toluene di-isocyanate(TDI) |
| US20100204496A1 (en) * | 2007-12-14 | 2010-08-12 | Dow Technology Investments Llc | Hydrocarbon/oxygen industrial gas mixer with coarse water droplet environment to reduce ignition potential |
| CN204429125U (en) * | 2014-12-08 | 2015-07-01 | 中国石油化工股份有限公司 | One is applicable to gas-gas rapid-action mixing arrangement |
| WO2016046074A1 (en) * | 2014-09-26 | 2016-03-31 | Innecs B.V. | Burner |
| CN108006435A (en) * | 2017-11-03 | 2018-05-08 | 中石化广州工程有限公司 | Liquefied natural gas gas-liquid pre-mixing apparatus |
| CN108310989A (en) * | 2018-01-09 | 2018-07-24 | 中石化上海工程有限公司 | The Fast Mixing Equipment of ethylene and oxygen |
| CN113332947A (en) * | 2021-05-28 | 2021-09-03 | 东南大学 | High flow ratio rapid mixer and annular reaction system using same |
-
2022
- 2022-06-10 CN CN202210655659.5A patent/CN115155352B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3525595A (en) * | 1967-05-19 | 1970-08-25 | Bayer Ag | Concentric cross flow nozzle apparatus for carrying out reactions between gases |
| FI58014B (en) * | 1972-02-10 | 1980-07-31 | Blueray Systems Inc | SAETT ATT BRAENNA FLYTANDE KOLVAETEN I EN BRAENNARE OCH ANORDNING FOER UTFOERANDE AV SAETTET |
| GB1413996A (en) * | 1972-10-25 | 1975-11-12 | Texaco Development Corp | Synthesis gas generation |
| EP0761298A2 (en) * | 1995-08-24 | 1997-03-12 | Praxair Technology, Inc. | Sparger for direct oxygen injection into a reactant stream for a fluidized bed reactor |
| JPH10249178A (en) * | 1997-03-14 | 1998-09-22 | Nippon Oil Co Ltd | Mixing deivce |
| US20060231645A1 (en) * | 2005-04-18 | 2006-10-19 | General Electric Company | Feed injector for gasification and related method |
| US20100204496A1 (en) * | 2007-12-14 | 2010-08-12 | Dow Technology Investments Llc | Hydrocarbon/oxygen industrial gas mixer with coarse water droplet environment to reduce ignition potential |
| CN101612547A (en) * | 2009-07-28 | 2009-12-30 | 赛鼎工程有限公司 | Produce the shell and tube impact flow reactor and the operating system of toluene di-isocyanate(TDI) |
| WO2016046074A1 (en) * | 2014-09-26 | 2016-03-31 | Innecs B.V. | Burner |
| CN204429125U (en) * | 2014-12-08 | 2015-07-01 | 中国石油化工股份有限公司 | One is applicable to gas-gas rapid-action mixing arrangement |
| CN108006435A (en) * | 2017-11-03 | 2018-05-08 | 中石化广州工程有限公司 | Liquefied natural gas gas-liquid pre-mixing apparatus |
| CN108310989A (en) * | 2018-01-09 | 2018-07-24 | 中石化上海工程有限公司 | The Fast Mixing Equipment of ethylene and oxygen |
| CN113332947A (en) * | 2021-05-28 | 2021-09-03 | 东南大学 | High flow ratio rapid mixer and annular reaction system using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115155352B (en) | 2023-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115155350B (en) | Mixer for mixing ethylene and oxygen | |
| US20060035183A1 (en) | Mixer | |
| CN106524152A (en) | Graded gas low-nitrogen burner | |
| CN105157064B (en) | The method of premixing and the burner arrangement for executing this method | |
| US20140221719A1 (en) | Premixer, radially fixed bed reactor, reaction system for oxidative dehydrogenation | |
| US3891562A (en) | Arrangement in a reactor for plasma-chemical processes | |
| CN107096410A (en) | A kind of fuel gas and oxygen mixer | |
| CN115155352A (en) | Mixer for mixing ethylene and oxygen | |
| CN114904408B (en) | Ethylene and oxygen mixer | |
| CN115155347B (en) | Mixer for mixing ethylene and oxygen | |
| CN115155353B (en) | Mixer for mixing ethylene and oxygen | |
| CN104815606A (en) | Vapor phase polymerization system and nozzle device thereof | |
| CN115155351B (en) | Mixer for mixing ethylene and oxygen | |
| CN217746540U (en) | Ethylene and oxygen mixing arrangement | |
| CN115155349B (en) | Ethylene and oxygen mixer | |
| CN115155348B (en) | Mixer for mixing ethylene and oxygen | |
| WO2006104418A2 (en) | Liquid atomizer | |
| CN209295106U (en) | The cooling jacket with heat exchange fin for coal gasification burner | |
| CN107899517A (en) | A kind of feed distributor for full liquid-phase operation fixed bed reactors | |
| CN205235239U (en) | Well multiple foam produces rifle fast | |
| CN210085386U (en) | Combined gasification burner | |
| CN214635484U (en) | Non-premixing vortex type gas mixing device | |
| CN207520883U (en) | A kind of fuel gas and oxygen mixer | |
| CN116272829B (en) | Jet reactor | |
| CN112808039A (en) | Non-premixing vortex type gas mixing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |