CN108310989A - The Fast Mixing Equipment of ethylene and oxygen - Google Patents
The Fast Mixing Equipment of ethylene and oxygen Download PDFInfo
- Publication number
- CN108310989A CN108310989A CN201810017986.1A CN201810017986A CN108310989A CN 108310989 A CN108310989 A CN 108310989A CN 201810017986 A CN201810017986 A CN 201810017986A CN 108310989 A CN108310989 A CN 108310989A
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- oxygen
- ethylene
- distribution pipe
- spiral distribution
- mixing equipment
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- 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
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- 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
- B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
Abstract
The present invention relates to the Fast Mixing Equipments of a kind of ethylene and oxygen, mainly solve the problems, such as that alkene in the prior art and oxygen mix effect are undesirable.The present invention by using a kind of ethylene and oxygen Fast Mixing Equipment, including ethylene main pipeline, mixing chamber, the end of ethylene main pipeline is connected to mixing chamber, mix several oxygen spiral distribution pipes of indoor deployments, spiral distribution pipe plane is vertical with ethylene flow direction, it is uniformly distributed several oxygen jets in each spiral distribution pipe, nozzle direction is consistent with ethylene flow direction, oxygen feeding pipeline is divided into several distribution pipes in main pipeline and enters ethylene supervisor, the technical solution that the oxygen that the ethylene entered from sprue is ejected with spiral distribution pipe nozzle is quickly mixed in mixed zone is set preferably to solve the above problem, it can be used in the mixing of ethylene and oxygen.
Description
Technical field
The present invention relates to the Fast Mixing Equipments of a kind of ethylene and oxygen.
Background technology
There are two types of the industrial processes of ethylene oxide/ethylene glycol (EO/EG), i.e. chlorethanol method and direct oxidation of ethylene to
Method.Direct oxidation of ethylene to method is divided into as air oxidation process and dioxygen oxidation method.Dioxygen oxidation method is compared with air oxidation process, technique
Flow is slightly shorter, and equipment is less, small investment of founding the factory；The high selectivity of catalyst in oxidation reaction, reaction temperature is lower than air method, right
The quiet run of extension and the maintenance production of catalyst life is advantageously.The production cost of usual dioxygen oxidation method compares air oxygen
Change method low 10% or so.Since dioxygen oxidation method has apparent superiority than air oxidation process, current epoxy in the world
Ethane/glycol unit generally uses dioxygen oxidation method.
Since oxygen and ethylene mixed gas are explosive gas, mixed explosion limit is wider.Oxygen with ethylene
Mixed process concentration quickly reduces, but there are an oxygen concentrations from being in explosion limit after quickly being mixed with ethylene, leaves
The process for limit of exploding.This just proposes very high requirement to the mixing of the Quick uniform of oxygen mixer, and the reliable of oxygen mixer sets
Meter is one of the key equipment of required solution in the necessary guarantee that direct oxidation method is kept the safety in production and the design of EO/EG devices.
At present using in the EO/EG process units of oxygen direct oxidation method technique, ethylene recycle gas and the quick of oxygen mix
Multiple jet mixer is all made of as unification.Oxygen jet is entered ethylene and is mixed by such mixer by the aperture of certain size
In ventilation, to quickly through the explosion limit of ethylene gaseous mixture and oxygen, make the safe, equal of ethylene gaseous mixture and oxygen safely
Even mixing.But it still has the undesirable problem of mixed effect.
Document CN200710118927.5 discloses a kind of methane and oxygen pre-mixer, mainly by shell, gas distribution system
System, heat-exchange system and porous gas distribution grid composition；Gas distributed system uses eddy flow or recycle stream compartment system；Cyclone gas
Body compartment system is made of methane gas handling system, oxygen gas handling system, upper distributor and lower distributor；Recycle stream compartment system
It is made of the methane and respective central feed tube of oxygen, cross feed pipe and annular gas distributor；Heat-exchange system by upper spacer,
Lower clapboard, central inner pipe, outer tube, metal fin, heat transferring medium inlet tube and heat transferring medium outlet composition；Methane and oxygen are logical
Gas distributed system is crossed in a smaller space after primary mixing, by being made of central inner pipe, outer tube and metal fin
Simulation fluid bed complications flow up, reach the mixing of molecular level in exit.
A kind of mixer of alkene and oxygen is disclosed in patent CN 105214528A, mainly at the end of oxygen channel
End has been symmetrical arranged several oxygen dispersion pipes, several oxygen dispersion holes, oxygen have been uniformly distributed on each oxygen dispersion pipe
Pipeline is connected to by oxygen dispersion hole with mixing chamber.But from the point of view of the section of alkene pipeline, oxygen dispersion hole is in the duct at the heart
Comparatively dense, it is sparse near wall.Oxygen concentration at supervisor center is higher than near wall in mixed process, influences mixing effect
Fruit.
Invention content
The technical problem to be solved by the present invention is to the undesirable problems of alkene in the prior art and oxygen mix effect, carry
For a kind of Fast Mixing Equipment of new ethylene and oxygen.The equipment has alkene and oxygen mix effect good, safe and reliable
Advantage.
To solve the above problems, the technical solution adopted by the present invention is as follows：A kind of Fast Mixing Equipment of ethylene and oxygen
Including ethylene main pipeline, mixing chamber, the end of ethylene main pipeline is connected to mixing chamber, several oxygen spiral distribution of mixing indoor deployments
Pipe, spiral distribution pipe plane is vertical with ethylene flow direction, several oxygen jets are uniformly distributed in each spiral distribution pipe, spray
Mouth direction is consistent with ethylene flow direction, and oxygen feeding pipeline is divided into several distribution pipes in main pipeline and enters ethylene supervisor, makes
The ethylene entered from sprue is quickly mixed with the oxygen that spiral distribution pipe nozzle ejects in mixed zone.
In above-mentioned technical proposal, it is preferable that spiral distribution pipe has 2-6,9~30m/s of flow velocity position in distribution ring.
In above-mentioned technical proposal, it is preferable that each spiral distribution pipe is arranged symmetrically in supervisor's sectional uniform.
In above-mentioned technical proposal, it is preferable that all spiral distribution pipes are arranged in a plane.
In above-mentioned technical proposal, it is preferable that the nozzle diameter in round distribution ring is 5~10 millimeters, nozzle velocity 32
~64m/s.
In above-mentioned technical proposal, it is preferable that injector spacing is 3~15 times of nozzle diameter.
In above-mentioned technical proposal, it is preferable that the opening direction of each distribution pipe top nozzle is consistent with alkene flow direction.
This patent devises a kind of mixer of ethylene and oxygen, which lays the distribution of several spirals
Pipe, oxygen enter ethylene conduit by the orifice jet in spiral distribution pipe and are accurately mixed with ethylene gas Quick uniform, be ensure that
Blast area in mixed process minimizes, and ensures mixed gas composition far from explosion section.All spiral shells of the present invention
Distribution pipe setting is revolved in a plane, and when ethylene distributes tube section by spiral, flow section is reduced, and pressure drop increases, and makes spiral
It distributes tube section upstream and downstream speed evenly, plays rectified action.And mixer structure of the present invention is flexible, and it can be according to specific
Production needs to adjust the quantity of spiral distribution pipe and the quantity of spiral distribution pipe top nozzle, and the configuration of the present invention is simple, can be apparent
The weld seam quantity in mixing apparatus is reduced, preferable technique effect is achieved.
Description of the drawings
Fig. 1 is a kind of structure diagram of embodiment of mixer of invention olefin and oxygen
Fig. 2 is oxygen spiral distribution pipe arrangement schematic diagram described in the method for the present invention.
In Fig. 1, Fig. 2,1- ethylene import 2- mixer outlet 3- oxygen inlet 4- spiral distribution pipe 5- nozzles.
Fig. 3 is that mixer spiral distributes tube section downstream different distance lateral cross section oxygen concentration relational graph in embodiment.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific implementation mode
【Embodiment 1】
A kind of on-line mixing equipment of ethylene and oxygen, as shown in Figure 1, 2, including ethylene main pipeline, oxygen channel, mixing
The end of room, ethylene main pipeline is connected to mixing chamber, several spiral distribution pipes of mixing indoor deployments, and oxygen passes through spiral distribution pipe
On orifice jet enter ethylene conduit and accurately mixed with ethylene gas Quick uniform.
On-line mixing equipment mixer structure parameter is as follows：
Using the mixer of Fig. 1 and ethylene shown in Fig. 2 and oxygen, alkene main pipeline internal diameter：DN1100, oxygen hose deferent
Diameter DN150, spiral distribution pipe caliber：DN80, spiral distribution pipe quantity are 3, and distribution pipe import is distributed in alkene main pipeline and cuts
Face, the angle between adjoining spiral distribution pipe is 120 degree, and mean flow rate is 12m/s in distribution pipe, is opened in each spiral distribution pipe
There are the aperture of 36 a diameter of 11mm, the end of nozzle velocity 45m/s, 3 spiral distribution pipes to converge and mixing chamber center.
Air inflow is as follows：
Oxygen flow：17t/h
Oxygen temperature：25℃
Oxygen pressure：2.6barG
Oxygen density：36kg/m3
Oxygen viscosity：0.021cp
Circulating air flow：683t/h
Circulating air temperature：35℃
Recycle atmospheric pressure：22barG
Recycle air tightness：20kg/m3
Circulating air viscosity：0.026cp
It is simulated using CFD, circulating air import and oxygen inlet are quality inlet boundary condition, are exported as pressure export boundary
Condition is divided using k-e turbulence models using tetrahedral grid, after calculating convergence, is obtained under mixer spiral distribution tube section
Different distance lateral cross section oxygen concentration is swum, sees Fig. 3, with the growth of mixing distance, the concentration side of oxygen is reduced with deviation,
At the 220mm distances of mixer spiral distribution pipe downstream, the side of oxygen concentration is less than rapidly 0.04 with deviation, illustrates oxygen
Concentration is relatively uniform, i.e. the mixed effect of oxygen and alkene is preferable, and mixing is met in shorter distance and is required.
【Embodiment 2】
According to condition described in embodiment 1 and step, on-line mixing equipment mixer structure parameter is as follows：
On-line mixing equipment mixer structure parameter is as follows：
Using the mixer of Fig. 1 and ethylene shown in Fig. 2 and oxygen, alkene main pipeline internal diameter：DN1100, oxygen hose deferent
Diameter DN150, spiral distribution pipe caliber：DN65, spiral distribution pipe quantity are 5, and distribution pipe import is distributed in alkene main pipeline and cuts
Face, the angle between adjoining spiral distribution pipe is 72 degree, and mean flow rate is 11m/s in distribution pipe, is opened in each spiral distribution pipe
There are the aperture of 21 a diameter of 11mm, the end of nozzle velocity 45m/s, 5 spiral distribution pipes to converge and mixing chamber center.
Air inflow is as follows：
Oxygen flow：17t/h
Oxygen temperature：25℃
Oxygen pressure：2.6barG
Oxygen density：36kg/m3
Oxygen viscosity：0.021cp
Circulating air flow：683t/h
Circulating air temperature：35℃
Recycle atmospheric pressure：22barG
Recycle air tightness：20kg/m3
Circulating air viscosity：0.026cp
It is simulated using CFD, circulating air import and oxygen inlet are quality inlet boundary condition, are exported as pressure export boundary
Condition is divided using k-e turbulence models using tetrahedral grid, after calculating convergence, is obtained under mixer spiral distribution tube section
Different distance lateral cross section oxygen concentration is swum, with the growth of mixing distance, the concentration side of oxygen is reduced with deviation, in circle
At the 200mm distances of distribution ring downstream, the side of oxygen concentration is less than 0.04 with deviation, illustrates that the concentration of oxygen is relatively uniform, i.e.,
The mixed effect of oxygen and alkene is preferable, can meet mixing substantially and require.
【Embodiment 3】
According to condition described in embodiment 1 and step, on-line mixing equipment mixer structure parameter is as follows：
On-line mixing equipment mixer structure parameter is as follows：
Using the mixer of Fig. 1 and ethylene shown in Fig. 2 and oxygen, alkene main pipeline internal diameter：DN500, oxygen hose deferent
Diameter DN50, spiral distribution pipe caliber：DN32, spiral distribution pipe quantity are 2, and distribution pipe import is distributed in alkene main pipeline and cuts
Face, the angle between adjoining spiral distribution pipe are 180 degree, and mean flow rate is 9m/s in distribution pipe, is opened in each spiral distribution pipe
There are the aperture of 18 a diameter of 7mm, the end of nozzle velocity 32m/s, 2 spiral distribution pipes to converge and mixing chamber center.
Air inflow is as follows：
Oxygen flow：6t/h
Oxygen temperature：25℃
Oxygen pressure：2.6barG
Oxygen density：36kg/m3
Oxygen viscosity：0.021cp
Circulating air flow：224t/h
Circulating air temperature：35℃
Recycle atmospheric pressure：22barG
Recycle air tightness：20kg/m3
Circulating air viscosity：0.026cp
It is simulated using CFD, circulating air import and oxygen inlet are quality inlet boundary condition, are exported as pressure export boundary
Condition is divided using k-e turbulence models using tetrahedral grid, after calculating convergence, is obtained under mixer spiral distribution tube section
Different distance lateral cross section oxygen concentration is swum, with the growth of mixing distance, the concentration side of oxygen is reduced with deviation, in circle
At the 450mm distances of distribution ring downstream, the side of oxygen concentration is less than 0.04 with deviation, illustrates that the concentration of oxygen is relatively uniform, i.e.,
The mixed effect of oxygen and alkene is preferable, can meet mixing substantially and require.
【Embodiment 4】
According to condition described in embodiment 1 and step, on-line mixing equipment mixer structure parameter is as follows：
On-line mixing equipment mixer structure parameter is as follows：
Using the mixer of Fig. 1 and ethylene shown in Fig. 2 and oxygen, alkene main pipeline internal diameter：DN500, oxygen hose deferent
Diameter DN50, spiral distribution pipe caliber：DN32, spiral distribution pipe quantity are 2, and distribution pipe import is distributed in alkene main pipeline and cuts
Face, the angle between adjoining spiral distribution pipe are 180 degree, and mean flow rate is 9m/s in distribution pipe, is opened in each spiral distribution pipe
There are the aperture of 18 a diameter of 5mm, the end of nozzle velocity 63m/s, 2 spiral distribution pipes to converge and mixing chamber center.
Air inflow is as follows：
Oxygen flow：6t/h
Oxygen temperature：25℃
Oxygen pressure：2.6barG
Oxygen density：36kg/m3
Oxygen viscosity：0.021cp
Circulating air flow：224t/h
Circulating air temperature：35℃
Recycle atmospheric pressure：22barG
Recycle air tightness：20kg/m3
Circulating air viscosity：0.026cp
It is simulated using CFD, circulating air import and oxygen inlet are quality inlet boundary condition, are exported as pressure export boundary
Condition is divided using k-e turbulence models using tetrahedral grid, after calculating convergence, is obtained under mixer spiral distribution tube section
Different distance lateral cross section oxygen concentration is swum, with the growth of mixing distance, the concentration side of oxygen is reduced with deviation, in circle
At the 400mm distances of distribution ring downstream, the side of oxygen concentration is less than 0.04 with deviation, illustrates that the concentration of oxygen is relatively uniform, i.e.,
The mixed effect of oxygen and alkene is preferable, can meet mixing substantially and require.
【Embodiment 5】
According to condition described in embodiment 1 and step, on-line mixing equipment mixer structure parameter is as follows：
On-line mixing equipment mixer structure parameter is as follows：
Using the mixer of Fig. 1 and ethylene shown in Fig. 2 and oxygen, alkene main pipeline internal diameter：DN1100, oxygen hose deferent
Diameter DN150, spiral distribution pipe caliber：DN32, spiral distribution pipe quantity are 6, and distribution pipe import is distributed in alkene main pipeline and cuts
Face, the angle between adjoining spiral distribution pipe is 60 degree, and mean flow rate is 28m/s in distribution pipe, is opened in each spiral distribution pipe
There are the aperture of 18 a diameter of 6mm, the end of nozzle velocity 64m/s, 6 spiral distribution pipes to converge and mixing chamber center.
Air inflow is as follows：
Oxygen flow：17t/h
Oxygen temperature：25℃
Oxygen pressure：2.6barG
Oxygen density：36kg/m3
Oxygen viscosity：0.021cp
Circulating air flow：683t/h
Circulating air temperature：35℃
Recycle atmospheric pressure：22barG
Recycle air tightness：20kg/m3
Circulating air viscosity：0.026cp
It is simulated using CFD, circulating air import and oxygen inlet are quality inlet boundary condition, are exported as pressure export boundary
Condition is divided using k-e turbulence models using tetrahedral grid, after calculating convergence, is obtained under mixer spiral distribution tube section
Different distance lateral cross section oxygen concentration is swum, with the growth of mixing distance, the concentration side of oxygen is reduced with deviation, in circle
At the 400mm distances of distribution ring downstream, the side of oxygen concentration is less than 0.04 with deviation, illustrates that the concentration of oxygen is relatively uniform, i.e.,
The mixed effect of oxygen and alkene is preferable, can meet mixing substantially and require.
【Comparative example】
Using the mixer of alkene and oxygen disclosed in patent CN105214528A, oxygen supply manifold distributes for rice font
Pipe, it is 7mm that distribution pipe caliber, which uses the pipe of DN40, nozzle bore size, each opens 12 nozzles by all means.Injector spacing
70mm.It using the feed conditions of embodiment 1, is simulated using CFD, circulating air import and oxygen inlet are quality inlet boundary item
Part is exported and is divided using tetrahedral grid using k-e turbulence models for pressure export boundary condition, after calculating convergence, is obtained
Mixer rice font distributor downstream different distance lateral cross section oxygen concentration distribution map, is shown in Fig. 3, from the figure 3, it may be seen that with mixing
The growth of distance, the concentration of oxygen side is reduced with deviation, in round distribution ring downstream 450mm distances, oxygen concentration it is equal
Side has been less than 0.04 with deviation.
By embodiment 1 and comparative example comparison it is found that under same feed conditions, using the present invention, circulating air and oxygen
Being blended in shorter distance can mix.
Claims (7)
1. the Fast Mixing Equipment of a kind of ethylene and oxygen, including ethylene main pipeline, mixing chamber, the end connection of ethylene main pipeline
Mixing chamber mixes several oxygen spiral distribution pipes of indoor deployments, and spiral distribution pipe plane is vertical with ethylene flow direction, each spiral shell
Several oxygen jets are uniformly distributed in rotation distribution pipe, nozzle direction is consistent with ethylene flow direction, and oxygen feeding pipeline is in master
Pipeline is divided into several distribution pipes and enters ethylene supervisor, and the ethylene entered from sprue is made to be ejected with spiral distribution pipe nozzle
Oxygen is quickly mixed in mixed zone.
2. the Fast Mixing Equipment of ethylene and oxygen according to claim 1, it is characterised in that spiral distribution pipe has 2-6,
9~30m/s of flow velocity position in distribution ring.
3. the Fast Mixing Equipment of ethylene and oxygen according to claim 1, it is characterised in that each spiral distribution pipe is in master
Tube section is symmetrically arranged.
4. the Fast Mixing Equipment of ethylene and oxygen according to claim 1, it is characterised in that all spiral distribution pipe arrangements
In a plane.
5. the Fast Mixing Equipment of ethylene and oxygen according to claim 1, it is characterised in that the nozzle in round distribution ring
A diameter of 5~10 millimeters, nozzle velocity is 32~64m/s.
6. the Fast Mixing Equipment of ethylene and oxygen according to claim 1, it is characterised in that injector spacing is nozzle diameter
3~15 times.
7. the Fast Mixing Equipment of ethylene and oxygen according to claim 1, it is characterised in that each distribution pipe top nozzle
Opening direction is consistent with alkene flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017986.1A CN108310989B (en) | 2018-01-09 | 2018-01-09 | Rapid mixing equipment for ethylene and oxygen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017986.1A CN108310989B (en) | 2018-01-09 | 2018-01-09 | Rapid mixing equipment for ethylene and oxygen |
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| CN108310989A true CN108310989A (en) | 2018-07-24 |
| CN108310989B CN108310989B (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810017986.1A Active CN108310989B (en) | 2018-01-09 | 2018-01-09 | Rapid mixing equipment for ethylene and oxygen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127191A (en) * | 2020-09-28 | 2020-12-25 | 新晃县自强纸业有限责任公司 | Conveying pipeline for producing corrugated medium paper by using waste paper box |
| CN112211019A (en) * | 2020-09-28 | 2021-01-12 | 新晃县自强纸业有限责任公司 | Method for producing corrugated medium paper by using waste paper box |
| CN115155352A (en) * | 2022-06-10 | 2022-10-11 | 中国石油化工股份有限公司 | Mixer for mixing ethylene and oxygen |
| CN115155350A (en) * | 2022-06-10 | 2022-10-11 | 中国石油化工股份有限公司 | Mixer for mixing ethylene and oxygen |
| CN115155347A (en) * | 2022-06-10 | 2022-10-11 | 中国石油化工股份有限公司 | Mixer for mixing ethylene and oxygen |
| CN115178168A (en) * | 2022-07-11 | 2022-10-14 | 兖矿鲁南化工有限公司 | Carbonylation slurry gas-liquid mixer and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127191A (en) * | 2020-09-28 | 2020-12-25 | 新晃县自强纸业有限责任公司 | Conveying pipeline for producing corrugated medium paper by using waste paper box |
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| CN115155350B (en) * | 2022-06-10 | 2024-02-23 | 中国石油化工股份有限公司 | Mixer for mixing ethylene and oxygen |
| CN115178168A (en) * | 2022-07-11 | 2022-10-14 | 兖矿鲁南化工有限公司 | Carbonylation slurry gas-liquid mixer and use method thereof |
| CN115178168B (en) * | 2022-07-11 | 2024-02-09 | 兖矿鲁南化工有限公司 | Carbonylation slurry gas-liquid mixer and use method thereof |
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