CN206648775U - The pressure drop monitoring system of the feed distributor of fluidized-bed reactor - Google Patents
The pressure drop monitoring system of the feed distributor of fluidized-bed reactor Download PDFInfo
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- CN206648775U CN206648775U CN201621435269.3U CN201621435269U CN206648775U CN 206648775 U CN206648775 U CN 206648775U CN 201621435269 U CN201621435269 U CN 201621435269U CN 206648775 U CN206648775 U CN 206648775U
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Abstract
It the utility model is related to a kind of feed distributor pressure drop monitoring system.A kind of feed distributor pressure drop monitoring system of fluidized-bed reactor, including：First pressure measures mouth, and it is located on the feed distributor suction line of proximal response wall；Second pressure measures mouth, on its reactor wall between dispersion plate and the nozzle end of feed distributor；Measuring unit, it is used to measure the pressure data between the first pressure measurement mouth and second pressure measurement mouth；And controller, measurement apparatus is connected to the controller via signal wire, and measured pressure data is transmitted to the controller；Wherein, controller calculates the pressure drop of feed distributor according to the pressure data transmitted by measuring unit, so as to judge whether the working condition of the feed distributor is normal.The monitoring system and monitoring method of measurement feed distributor pressure drop of the present utility model, can realize monitoring feed distributor working condition in real time, and make anticipation and processing in advance to it.
Description
Technical field
It the utility model is related to a kind of pressure drop monitoring system for fluidized-bed reactor.In particular to for ammonia
The pressure drop monitoring system of the feed distributor of oxidation reactor.
Background technology
Acrylonitrile is the important industrial chemicals of petrochemical industry.Countries in the world generally use ammoxidation One-step production propylene
Nitrile, i.e. unstripped gas air, propylene, ammonia press certain proportioning, in the presence of catalyst, under certain reaction condition, occur
Propylene ammonia Selective Oxidation, generation acrylonitrile and by-product acetonitrile and hydrogen cyanide etc., while release substantial amounts of reaction heat.Fig. 1 institutes
Show for business acrylonitrile fluid bed reactor 1, including：Reactor wall 4, air feed mouth 8, dispersion plate 6, third
Alkene ammonia feed distributor 10, cooling coil 7 and cyclone separator (not shown).
Typical acrylonitrile fluid bed propylene ammonia feed distributor is multitube distributor, and multitube distributor includes distribution
Device entrance；Feed distributor is responsible for；Feed distributor branch pipe；And feed distributor nozzle, fluid is connected in pipeline.Unstripped gas from
Distributor inlet enters, and is passed to and is responsible on each branch pipe being connected along supervisor, then as shown in Fig. 2 by branch pipe 12
Each orifice 13 of distribution is passed to nozzle 15, is finally passed in bed.So, unstripped gas is oriented to along feed distributor pipeline
It is dispersed in bed.
When carrying out the oxidation reaction of propylene ammonia using acrylonitrile fluid bed reactor, the propylene ammonia feed distributor of fluid bed
Pressure drop Δ PdIt is an important parameter.The design of good propylene ammonia feed distributor pressure drop, reactor unit can be made horizontal
Propylene ammonia unstripped gas containing equivalent on section, this requires that the gas flow of each feed distributor nozzle outflow is equivalent
's.Unstripped gas produces local crushing during through orifice, i.e. in Fig. 2 at branch pipe 12 between the end of nozzle 15
Pressure difference, the pressure difference are propylene ammonia feed distributor pressure drop Δ Pd。
Propylene ammonia feed distributor gas distribution performance directly influences the reaction result of propylene ammonia selective oxidation, to ensure air-flow
Be uniformly distributed, and the not serious uneven consequence caused by the reducing of certain fluctuation or load need to typically have distributor
Enough pressure drops, scholars are accustomed to distributor pressure drop Δ PdWith bed pressure drop Δ PbBe used for research object.ΔPd/ΔPb
Ratio is bigger, then the more uniform but excessive pressure drop of gas distribution causes excessive energy consumption.
Non-patent literature《Capacity-Expansion Revamping of Acrylonitrile Units is studied》(in fly etc.,《Contemporary chemical industry》2005, volume 34, the 5th
Phase, page 345~353) disclose after acrylonitrile installation expands energy, because gas orifice speed increases, the abrasion of accelerator activator particle,
Destroy overall fluidized state.But in document, i.e., without the open method for measuring perforation Kong Su, also not publicly measure distributor pressure
The method of drop, and its announced on perforation hole speed and distributor pressure drop be perfect condition simulation result, rather than
Real measurement result.
On the other hand, updating with acrylonitrile technology, (propylene is transformed into target product to the activity index of catalyst
Yield), particle wearability, the separative efficiency of cyclone separator etc. all increase, meanwhile, it is higher also to require that reactor has
Operation lines speed is to improve the production capacity of acrylonitrile installation.Feed distributor pressure drop is relatively low easily to cause unstripped gas distribution not
, also it is more than easily because perforation hole speed is relatively low, the aperture possibility bigger than normal for causing catalyst to alter especially for diameter
8.5 meters of large-scale acrylonitrile fluid bed reactor.Reaction result is directly influenced because feed distributor pressure drop is relatively low, while
It is unfavorable for the production steady in a long-term of device.
Utility model content
In order to overcome above-mentioned technical problem, the utility model provides a kind of feed distributor pressure drop Δ of fluidized-bed reactor
PdMonitoring system.Pass through measurement feed distributor pressure drop Δ P of the present utility modeldMonitoring system, real-time monitoring can be realized
Feed distributor working condition, and make anticipation and processing in advance to it.
The utility model provides a kind of feed distributor pressure drop monitoring system of fluidized-bed reactor, it is characterised in that bag
Include：First pressure measures mouth, and first pressure measurement mouth is located on the feed distributor suction line of proximal response wall；Second pressure
Power measures mouth, and the second pressure measures reactor wall of the mouth between dispersion plate and the nozzle end of feed distributor
On；Measuring unit, the measuring unit are used to measure the pressure data between first pressure measurement mouth and second pressure measurement mouth；With
And controller, measurement apparatus is connected to the controller via signal wire, and measured pressure data is transmitted to the controller,
Wherein, controller calculates the pressure drop of feed distributor according to the pressure data transmitted by measuring unit, so as to judge to feed
Whether the working condition of distributor is normal.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that measuring unit includes：First pressure
Force measuring device, the first pressure measurement apparatus are used for the pressure for measuring propylene ammonia gaseous mixture at first pressure measurement mouth；With
Two device for pressure measurement, the Second device for pressure measurement are used to measure the pressure at second pressure measurement mouth, also, wherein, control
Device processed calculates feed distributor according to the pressure data transmitted by first pressure measurement apparatus and Second device for pressure measurement
Pressure drop, so as to judge whether the working condition of feed distributor normal.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that measuring unit is surveyed including pressure difference
Device is measured, the differential pressure measurement device is used to measure the pressure differential between first pressure measurement mouth and second pressure measurement mouth, also,
Wherein, controller calculates the pressure drop of feed distributor according to the pressure data transmitted by differential pressure measurement device, so as to judge
Whether the working condition of feed distributor is normal.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that also include being arranged on the first pressure
Power measures the blow device at mouth and second pressure measurement mouth, and the blow device measures mouth and second pressure measurement in first pressure
0~10Nm is provided at mouthful3/ h purging wind.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that blow device is in first pressure
Measure and provide 1~10Nm at mouth and second pressure measurement mouth3/ h purging wind.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that when the pressure drop of feed distributor
For bed pressure drop 25%~160% when, controller judge feed distributor working condition be normal.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that when the pressure drop of feed distributor
For bed pressure drop 35%~140% when, controller judge feed distributor working condition be normal.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that also include：High pressure nitrogen purges
Device, wherein, when controller judges that the pressure drop of feed distributor is higher than the higher limit of preset range, then automatic start elevated pressure nitrogen
Air-blowing sweeping device, to be purged to feed distributor.
According to feed distributor pressure drop monitoring system of the present utility model, it is characterised in that also include：High pressure nitrogen purges
Device, wherein, when controller judges that the pressure drop of feed distributor is less than the lower limit of preset range, automatic start high pressure nitrogen
Blow device, and nitrogen is continuously stably supplied in feed distributor so that the pressure drop of feed distributor reaches normal
Working condition.
According to feed distributor pressure drop monitoring method of the present utility model, wherein, when the pressure drop for judging feed distributor is high
When the higher limit of preset range, then automatic start high pressure nitrogen blow device, is purged to feed distributor.
According to feed distributor pressure drop monitoring method of the present utility model, wherein, when the pressure drop for judging feed distributor is low
When the lower limit of preset range, automatic start high pressure nitrogen blow device, and nitrogen is continuously stably supplied to feed
In distributor so that the pressure drop of feed distributor reaches normal working condition.
Pass through measurement feed distributor pressure drop Δ P of the present utility modeldMonitoring system, can realize in real time monitoring charging
Distributor working condition, and make anticipation and processing in advance to it.
Brief description of the drawings
Fig. 1 is the schematic diagram of the propylene ammonia fluidized-bed reactor of prior art.
Fig. 2 is the nozzle schematic diagram of the propylene ammonia feed distributor of prior art.
Fig. 3 is the schematic diagram of feed distributor pressure drop monitoring system of the present utility model.
Fig. 4 is the schematic diagram of feed distributor pressure drop monitoring system of the present utility model.
Description of reference numerals
1 propylene ammonoxidizing fluid bed reactor
2 propylene ammonia feed distributor entrances
3 pressure measxurement mouths
4 wall of reactor
5 measuring units
6 dispersion plates
7 cooling coils
8 air feed mouths
9 nitrogen purging devices
10 feed distributors
12 branch pipes
13 orifices
14 nozzles
Embodiment
Charging point of the present utility model will be described in detail with reference to the attached drawings by taking propylene ammonoxidizing fluid bed reactor as an example below
Cloth device pressure drop Δ PdMonitoring system, but the utility model is not limited to the feed distributor of ammonia oxidation reactor.
Normal conditions, it is desirable to there is identical gas flow on fluidized-bed reactor unit cross-sectional area, that is, require charging point
The amount for the unstripped gas that each nozzle of cloth device is flowed out is consistent, i.e., propylene ammonia gaseous mixture is by the punching rate of each orifice
Identical.However, perforation Kong Su is to be very difficult to measurement and monitoring, therefore, it is desirable to directly be reacted by punching rate anti-
The working condition for answering device is extremely difficult.
The present inventor is by the discovery that studies for a long period of time, feed distributor pressure drop Δ PdSpeed during orifice is passed through to have with gaseous mixture
Close.Device is in normal course of operation, when when generation feed distributor part, orifice has stopping state generation, due to other orifices
The tolerance increase flowed through causes the increase of average bore hole speed, and this result shows feed distributing plate pressure differential deltap PdIncrease；
And when there is nitridation embrittlement to occur on feed distributor pipe fitting, there are more unstripped gas to enter bed by crack, cause orifice
The tolerance flowed through is reduced, and the result of the reduction of average bore hole speed shows feed distributing plate pressure differential deltap PdReduction.
As described above, pressure difference, the pressure difference are the charging point of propylene ammonia between the end of nozzle 15 at branch pipe 12 in Fig. 2
Cloth device pressure drop Δ Pd.But in actual production process, due to the fact that causing to be difficult to the portion shown in actual measurement Fig. 2
The pressure difference of position.Firstly, since the reaction temperature of reactor is very high, typically more than 400 DEG C, sensor can be caused damage.Separately
On the one hand, set sensor also to influence the charging effect of feed distributor in feed distributor, easily cause charging uneven
It is even.
The present inventor is through studying and testing discovery, in propylene ammonia gaseous mixture in the porch of feed distributor 10 to branch pipe 12
The crushing at (particular location shown in Fig. 2) place, and the crushing that propylene ammonia gaseous mixture enters at beds through nozzle 15 are equal
It is very small, relative to feed distributor pressure drop Δ P defined abovedIt can be ignored.Based on this discovery, this reality is realized
With new feed distributor pressure drop Δ PdMonitoring device and monitoring method.
Specifically, as shown in figure 3, feed distributor pressure drop Δ P of the present utility modeldMeasurement apparatus includes：First pressure
Power measurement mouth 2, second pressure measurement mouth 3, measuring unit 5 and controller (not shown).
The position of first pressure measurement mouth 2 is not specifically limited, but is in order at purpose easy to operate, preferably by it
It is arranged on the suction line of feed distributor 10 of proximal response wall 4, to measure the propylene ammonia of the porch of feed distributor 10
Mixture pressure.Second pressure measurement mouth 3 be preferably located in the nozzle 15 of dispersion plate 6 and feed distributor 10 end it
Between reactor wall 4 on, to measure the pressure of the propylene ammonia gaseous mixture in the exit of the nozzle 15 of feed distributor 10.For surveying
The type of amount unit 5 is not specifically limited, and can be measured first pressure measurement mouth 2 and second respectively using single pressure gauge and be pressed
The pressure for the propylene ammonia gaseous mixture that power measurement mouth 3 is each located, then transmits respective pressure data to controller, then by controlling
Device processed calculates the difference of the two, so as to obtaining the pressure drop Δ P of feed distributord.Or can also directly it be surveyed using differential pressure indicator
Pressure difference between the pressure measxurement mouth of flow control one and second pressure measurement mouth, and by the data transfer to controller.
The type of controller is not specifically limited, but preferably DCS control systems, it can intuitively show that pressure difference becomes
Change situation, i.e. feed distributor pressure drop Δ PdSituation of change.
Preferably, to prevent catalyst blockage pressure from measuring mouth, measured in first pressure at mouth and second pressure measurement mouth
The purging wind (not shown) of identical working condition is given respectively.Purging wind is 0~10Nm3/ h, preferably 1~10Nm3/h。
In the case where the distinguished and admirable speed of purging is excessive, beds may be had an impact.
As shown in figure 4, feed distributor pressure drop Δ P of the present utility modeldMeasurement apparatus also includes high pressure nitrogen purging dress
Put 9.Nitrogen purging device 9 is connected to feed distributor 10, when DCS control systems judge feed distributor pressure drop Δ PdMeasured value
, can be with the automatic start high pressure nitrogen blow device not in preset range, and high pressure nitrogen is introduced to feed distributor 10.
According to feed distributor pressure drop Δ P of the present utility modeldMeasurement apparatus, can be to feed distributor pressure drop Δ PdEnter
Row measures and judges whether the working condition of feed distributor is normal.
In Acrylonitrile Production, the change in feed distributor orifice aperture has influence on unstripped gas perforation Kong Su change
Change, directly show feed distributing plate pressure drop Δ PdChange.Thus, feed distributing plate pressure drop Δ P is passed throughdChange be turned to sentence
It is feasible that whether disconnected feed distributor, which is in normal operating conditions,.
Device is in normal course of operation, when when generation feed distributor part, orifice has stopping state generation, due to it
The tolerance increase that his orifice flows through causes the increase of average bore hole speed, and this result shows feed distributing plate pressure differential deltap Pd's
Increase；And when there is nitridation embrittlement to occur on feed distributor pipe fitting, there are more unstripped gas to enter bed by crack, cause
The tolerance that orifice flows through is reduced, and the result of the reduction of average bore hole speed shows feed distributing plate pressure differential deltap PdReduction.Enter
Increasing or reducing for material distribution grid pressure difference reflects that feed distributor is in improper working condition.
Specifically, in feed distributor pressure drop Δ P of the present utility modeldIn measurement apparatus, by measured by measuring unit
Pressure data feedback (transmission) to DSC control systems.As feed distributor pressure drop Δ PdMeasured value is bed pressure drop Δ Pb's
When 25%~160%, then the working condition for judging feed distributor is normal.Feed distributor pressure drop Δ PdMeasured value is preferred
For bed pressure drop Δ Pb30%~150%, more preferably bed pressure drop Δ Pb35%~140%.
On the contrary, work as feed distributor pressure drop Δ PdWhen measured value is not within above range, then feed distributor 10 is judged
Working state abnormal.
Specifically, device is in normal course of operation, as feed distributor pressure drop Δ PdMeasured value is higher than above range
Higher limit when, DCS control systems give high limit prompting, remind feed distributor 10 to there may be part orifice stopping state simultaneously
Automatic start high pressure nitrogen blow device 9 is purged to feed distributor, and high pressure nitrogen is introduced to the pipe of feed distributor 10
Lu Zhong, blocked so as to eliminate.And work as feed distributor pressure drop Δ PdWhen measured value is less than the setting lower limit of above range, DCS controls
System processed gives lower bound prompting, reminds propylene ammonia feed distributor to there is a possibility that to nitrogenize embrittlement.
Device is during overload operation, and the unstripped gas scale of construction of each orifice outflow of feed distributor is compared with device at full capacity
Synchronously increase during operation, for same device, the perforation Kong Su that gas flows through orifice also increased, can equally show into
Expect distributor pressure drop Δ PdIncrease, in feed distributor pressure drop Δ P of the present utility modeldIn measurement apparatus, by measuring unit institute
The pressure data of measurement feeds back (transmission) to DSC control systems.DCS control systems give high limit prompting, feed distributor Δ Pd
To be advisable not higher than set higher limit, for example, the higher limit can be set as to device bed pressure drop Δ Pb160%.
Device is during underrun, and the unstripped gas scale of construction of each orifice outflow of feed distributor is compared with device at full capacity
Synchronously reduced during operation, for same device, the perforation Kong Su that gas flows through orifice has also been reduced, and shows charging distribution
Device pressure drop Δ PdReduction, under extreme case, have influence on feed distributor gas distribution effect, cause to feed uneven, reaction result
Deteriorate.In feed distributor pressure drop Δ P of the present utility modeldIt is in measurement apparatus, the pressure data measured by measuring unit is anti-
(transmission) is presented to DSC control systems.DCS control systems give lower bound prompting, for example, the lower limit can be set as to device bed
Lamination drop Δ Pb20%.When device underrun, feed distributor measurement pressure differential deltap PdDuring less than lower limit, open automatically
Dynamic high pressure nitrogen blow device, and nitrogen flow can be adjusted so that nitrogen can be stably continuously with entering raw material tracheae
Line, and be mixed with unstripped gas and be introduced to feed distributor, meet feed distributor pressure differential deltap PdReach DCS control systems to
The lower limit set value given, reactor is set to maintain normal operation.
Embodiment
Come below by way of specific embodiment to feed distributor pressure drop Δ P of the present utility modeldMonitoring
Device is further described in more detail.But the utility model is not limited to specific examples below.
Embodiment 1
Acrylonitrile fluid bed reactor diameter is 7 meters, and catalyst is rubbed using conventional commercial propylene nitrile catalyst, unstripped gas
You compare propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Device is lower at full capacity to be transported
OK, respectively on the suction line of the proximal response wall of feed distributor and the nozzle end of dispersion plate and feed distributor
Between reactor wall on set pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributordFor bed layer pressure Δ Pb's
41.6%.Reaction result is that AN yields are 80.2%, propylene conversion 98.0%.
Embodiment 2
Acrylonitrile fluid bed reactor is existed respectively with reaction working condition with embodiment 1, device with being run under 80% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, the pressure drop Δ Pd of actually measured Acrylamide distributor is the 26.8% of bed layer pressure Δ Pb.
Reaction result is that AN yields are 79.7%, propylene conversion 97.5%.
Embodiment 3
Acrylonitrile fluid bed reactor is existed respectively with reaction working condition with embodiment 1, device with being run under 70% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, starts high pressure nitrogen device, draws nitrogen and enter feed distributor, measure Acrylamide distributor
Pressure drop Δ Pd is the 41.4% of bed layer pressure Δ Pb.Reaction result is that AN yields are 80.0%, propylene conversion 98.6%.
Comparative example 1：
With reaction working condition with embodiment 1, device is lower at full capacity to be run acrylonitrile fluid bed reactor.Feeding respectively
Reactor on the suction line of the proximal response wall of distributor between dispersion plate and the nozzle end of feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb21.8%.Reaction knot
Fruit is that AN yields are 79.4%, propylene conversion 97.1%.
Comparative example 2
With reaction working condition with embodiment 1, device is lower at full capacity to be run acrylonitrile fluid bed reactor.Feeding respectively
Reactor on the suction line of the proximal response wall of distributor between dispersion plate and the nozzle end of feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb18.2%.Reaction knot
Fruit is that AN yields are 75.3%, propylene conversion 93.2%.Device parking maintenance, it is found that feed distributor pipeline has many places
Embrittlement seepage.
Embodiment 4
Acrylonitrile fluid bed reactor diameter is 12 meters, and catalyst uses acrylonitrile catalyst in the same manner as in Example 1,
Feed gas molar compares propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Device is expired
Run under load, respectively on the suction line of the proximal response wall of feed distributor and dispersion plate and feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on the reactor wall between nozzle enddFor bed pressure
Power Δ Pb42.6%.Reaction result is that AN yields are 80.1%, propylene conversion 98.4%.
Embodiment 5
Acrylonitrile fluid bed reactor is existed respectively with reaction working condition with embodiment 4, device with being run under 70% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, the pressure drop Δ Pd of actually measured Acrylamide distributor is the 25.8% of bed layer pressure Δ Pb.
Reaction result is that AN yields are 79.3%, propylene conversion 96.5%.
Embodiment 6
Acrylonitrile fluid bed reactor is existed respectively with reaction working condition with embodiment 4, device with being run under 70% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, starts high pressure nitrogen device, draws nitrogen and enter feed distributor, measure Acrylamide distributor
Pressure drop Δ Pd is the 38.8% of bed layer pressure Δ Pb.Reaction result is that AN yields are 79.8%, propylene conversion 98.2%.
Embodiment 7
Acrylonitrile fluid bed reactor diameter is 9.0 meters, and catalyst uses identical acrylonitrile catalyst in embodiment 1,
Feed gas molar compares propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Exist respectively
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, the pressure drop Δ Pd of actually measured Acrylamide distributor is the 90.9% of bed layer pressure Δ Pb.
Reaction result is that AN yields are 80.5%, propylene conversion 99.1%.
Embodiment 8
Acrylonitrile fluid bed reactor diameter is 12 meters, and catalyst uses identical acrylonitrile catalyst in embodiment 1, former
Expect gas mol ratio propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Entering respectively
Expect the reaction between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb98.8%.Reaction
As a result it is that AN yields are 80.3%, propylene conversion 98.7%.
Embodiment 9
With reaction working condition with embodiment 8, device is lower at full capacity to be run acrylonitrile fluid bed reactor.Feeding respectively
Reactor on the suction line of the proximal response wall of distributor between dispersion plate and the nozzle end of feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb172.4%.Reaction
As a result it is that AN yields are 78.7%, propylene conversion 96.5%.DSC control system automatic start nitrogen purging devices, by height
Pressure nitrogen introduces feed distributor and purged.After closing nitrogen purging device and question response stabilization, Acrylamide distributor is measured
Pressure drop Δ PdFor bed layer pressure Δ Pb103.1%.Reaction result is that AN yields are 80.4%, propylene conversion 98.7%.
Claims (9)
- A kind of 1. feed distributor pressure drop monitoring system of fluidized-bed reactor, it is characterised in that including：First pressure measures mouth, and first pressure measurement mouth is located on the feed distributor suction line of proximal response wall；Second pressure measures mouth, second pressure measurement mouth be located at dispersion plate and the feed distributor nozzle end it Between reactor wall on；Measuring unit, the measuring unit are used to measure the pressure between the first pressure measurement mouth and second pressure measurement mouth Force data；AndController, the measurement apparatus is connected to the controller via signal wire, and measured pressure data is transmitted to this Controller,Wherein, the controller calculates the pressure of the feed distributor according to the pressure data transmitted by the measuring unit Drop, so as to judge whether the working condition of the feed distributor is normal.
- 2. feed distributor pressure drop monitoring system as claimed in claim 1,Characterized in that, the measuring unit includes：First pressure measurement apparatus, the first pressure measurement apparatus are used to measure propylene ammonia mixing at the first pressure measurement mouth The pressure of gas；WithSecond device for pressure measurement, the Second device for pressure measurement are used to measure the pressure at the second pressure measurement mouth, and AndWherein, the controller is according to the pressure transmitted by the first pressure measurement apparatus and the Second device for pressure measurement Force data calculates the pressure drop of the feed distributor, so as to judging whether the working condition of the feed distributor is normal.
- 3. feed distributor pressure drop monitoring system as claimed in claim 1,Characterized in that, the measuring unit includes differential pressure measurement device, the differential pressure measurement device is used to measure first pressure Power measures the pressure differential between mouth and second pressure measurement mouth, andWherein, the controller calculates the feed distributor according to the pressure data transmitted by the differential pressure measurement device Pressure drop, so as to judge whether the working condition of the feed distributor normal.
- 4. feed distributor pressure drop monitoring system as claimed in claim 1, in addition to it is arranged on the first pressure measurement mouth With the blow device at second pressure measurement mouth, the blow device measures mouth and the second pressure in the first pressure Measure and 0~10Nm is provided at mouth3/ h purging wind.
- 5. feed distributor pressure drop monitoring system as claimed in claim 4, it is characterised in that the blow device is described 1~10Nm is provided at one pressure measxurement mouth and second pressure measurement mouth3/ h purging wind.
- 6. the feed distributor pressure drop monitoring system as described in claim 1 to 5 any one, it is characterised in that when it is described enter When the pressure drop for expecting distributor is the 25%~160% of bed pressure drop, the controller judges the work shape of the feed distributor State is normal.
- 7. feed distributor pressure drop monitoring system as claimed in claim 6, it is characterised in that when the pressure of the feed distributor When being reduced to the 35%~140% of the bed pressure drop, the controller judges that the working condition of the feed distributor is normal 's.
- 8. feed distributor pressure drop monitoring system as claimed in claim 6, it is characterised in that also include：High pressure nitrogen blow device, wherein,When the controller judges that the pressure drop of the feed distributor is higher than the higher limit of preset range, then described in automatic start High pressure nitrogen blow device, to be purged to the feed distributor.
- 9. feed distributor pressure drop monitoring system as claimed in claim 6, it is characterised in that also include：High pressure nitrogen blow device, wherein,It is high described in automatic start when the controller judges that the pressure drop of the feed distributor is less than the lower limit of preset range Nitrogen purging device is pressed, and nitrogen is continuously stably supplied in the feed distributor so that the feed distributor Pressure drop reach normal working condition.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018113417A1 (en) * | 2016-12-23 | 2018-06-28 | 中国石油化工股份有限公司 | Pressure drop control system and control method of feed distributor of a fluidized bed reactor |
| TWI775796B (en) * | 2018-01-11 | 2022-09-01 | 大陸商中國石油化工科技開發有限公司 | Pressure drop control system and pressure drop control method for feed distributor of fluidized bed reactor |
-
2016
- 2016-12-23 CN CN201621435269.3U patent/CN206648775U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018113417A1 (en) * | 2016-12-23 | 2018-06-28 | 中国石油化工股份有限公司 | Pressure drop control system and control method of feed distributor of a fluidized bed reactor |
| CN108240884A (en) * | 2016-12-23 | 2018-07-03 | 中国石油化工股份有限公司 | The pressure drop monitoring system and monitoring method of the feed distributor of fluidized-bed reactor |
| KR20190100265A (en) * | 2016-12-23 | 2019-08-28 | 차이나 페트로리움 앤드 케미컬 코포레이션 | Pressure drop control system and pressure drop control method for feed distributor in fluidized bed reactor |
| CN108240884B (en) * | 2016-12-23 | 2020-04-17 | 中国石油化工股份有限公司 | Pressure drop monitoring system and monitoring method for feeding distributor of fluidized bed reactor |
| EA037190B1 (en) * | 2016-12-23 | 2021-02-17 | Чайна Петролеум Енд Кемикал Корпорейшн | Pressure drop control system and method for feed distributor in fluidized bed reactor |
| KR102453080B1 (en) | 2016-12-23 | 2022-10-07 | 차이나 페트로리움 앤드 케미컬 코포레이션 | Pressure drop control system and pressure drop control method for feed distributor of fluidized bed reactor |
| TWI775796B (en) * | 2018-01-11 | 2022-09-01 | 大陸商中國石油化工科技開發有限公司 | Pressure drop control system and pressure drop control method for feed distributor of fluidized bed reactor |
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