CN205235939U - Single gaseous phase fluidized bed reactor bin outlet suitable for multi -region polymerization - Google Patents
Single gaseous phase fluidized bed reactor bin outlet suitable for multi -region polymerization Download PDFInfo
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Abstract
The utility model relates to a single gaseous phase fluidized bed reactor bin outlet suitable for multi -region polymerization, this bin outlet set up on gaseous phase fluidized bed reactor (1), the bin outlet be provided with the three -layer, be upper bin outlet (12), middle level bin outlet (13) and lower floor's bin outlet (14) respectively, each bin outlet all is equipped with and cuts off with plunger valve (16), one power -driven rotation valve (17) are connected in each plunger valve (16), control the rotation rate and the mode of rotation of power -driven rotation valve (17) through setting for the material level to the material volume is arranged in control. Compared with the prior art, the utility model has the advantages of row expects the ability dynamic height, row's flich formula is nimble adjustable, utilization ratio of material is high.
Description
Technical field
The utility model relates to a kind of single gas-phase fluidized-bed reactor discharge gate, especially relates to one and is applicable to manySingle gas-phase fluidized-bed reactor discharge gate of district's polymerisation.
Background technology
Along with the development of polyethylene industry, gas-phase fluidized-bed polyethylene process technology and production line are widely used(whole world exceedes 70%), and generally present the feature of maximization, deep condensation. Wherein the most extensively adoptWith the gas-phase fluidized-bed polyethylene process of U.S. Univation (whole world exceedes 50%, approximately 200 cover) and Chinese stoneThe gas-phase fluidized-bed polyethylene process of ST (approximately 6 cover) of changing has improved constantly production capacity under existing apparatus conditionBecome Ge great petroleum chemical enterprise and pursue the effective measures of benefit. The appearance of modern condensation technology, especially deep condensation willReactor load has improved 1～2 times from original designed capacity, has brought appreciable benefit to petroleum chemical enterprise.
Along with the application of super condensation technology, the increasing of condensing deep, Gu traditional gas--two gas phase fluidizationsGu bed developing into three, gas--liquid--and deposit gas-phase fluidized-bed, mean that a part of polymerisation may beThe larger region of liquid content of fluid bed bottom is initiated, occurs, and the particle that unreacted polymerization completes is with ascending airGu enter, the gas on fluid bed top--polymerisation is proceeded in region. Due to thermograde in whole fluid bed and anti-Answer the existence of substrate concentration gradient, the polymerizate of zones of different is distinguishing. In this case, only at same waterThe original discharge system that designs one or several discharge gates in plane can not meet discharge requirement completely. Exist in additionNear the discharge gate near gas distribution grid top of traditional design, just enter condensing agent (the inertia long-chain of reactorAlkane: as pentane, isopentane, n-hexane etc.) and comonomer (as butene-1, hexene-1 etc.) also incompleteBecome gas phase from liquid phase, just taken out of with resin powder discharge, not only destroyed gas--the liquid of fluid bed bottom--Gu and three balances affect the realization of bottom target product, and cause supplement enter fluid bed fresh material notParticipate in polymerisation and be discharged from and waste, also make resin powder be clamminess because liquid content is high and condensing agent in a large numberWaste, also easily causing discharge line to stop up cannot discharge and increased the weight of the degassed de-hydrocarbon in downstream and recovery system burden,Finally cause reduction or the waste of material, the energy and production efficiency.
Summary of the invention
The purpose of this utility model is exactly to provide one to be applicable in order to overcome the defect that above-mentioned prior art existsSingle gas-phase fluidized-bed reactor discharge gate of multi-region polymerisation.
The purpose of this utility model can be achieved through the following technical solutions:
A single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation, it is anti-that this discharge gate arranges placeAnswer on device, it is characterized in that, described discharge gate is provided with three layers, is respectively upper strata discharge gate, middle level discharge gateWith lower floor's discharge gate, each discharge gate is equipped with partition plunger valve, and each plunger valve connects an electronic rotation valve, passes throughSet material level and control rotary speed and the rotation mode of electronic rotation valve, thereby control withdrawal rate.
Described upper strata discharge gate is provided with 1～3, and this upper strata discharge gate is positioned under gas-phase fluidized-bed normal operating charge level80%～90% square, to be equivalent to normal operating charge level height position.
Described middle level discharge gate is provided with 1～3, and this middle level discharge gate is positioned under gas-phase fluidized-bed normal operating charge level40%～60% square, to be equivalent to normal operating charge level height position.
Described lower floor's discharge gate (14) is provided with 1～2, and this lower floor's discharge gate is arranged on the distribution grid of reactor0.2～0.5m place of side.
The withdrawal rate of described upper strata discharge gate accounts for the 50wt%～100wt% of total withdrawal rate; Described middle level dischargeThe withdrawal rate of mouth accounts for the 50wt%～0wt% of total withdrawal rate; Described lower floor's discharge gate is used for discharging lower sinker material.
Described reactor discharge gate is connected with respectively discharge line, and the sidewall of this discharge line and reactor is 45 °～60 ° of angles, described plunger valve is arranged in discharge line, and the pitch pipe design of the discharge mouth of pipe reduces greatlyPowder while discharging for impulsive force and the pulsating stress of pipeline outlet, the granule size of protection powder, can obtainDesirable powder product, the control of electronic rotation valve can show and control in control system timely and effectively.
Described plunger valve has Chang Kai and two kinds of duties of normally closed work, and when discharge gate comes into operation, plunger valve isNormally open, stops using when discharge gate, and plunger valve is normal off status, under normal condition, and the discharge gate plunger being come into operationValve often leaves, and this gravity flow design can be saved the traditional design that needs a large amount of gas purgings and auxiliary facility thereof.
When the described normal off status of plunger valve, plunger protrudes and extends to gas-phase fluidized-bed reactor wall, and flat with inwallSliding without dead angle, prevent that reaction raw materials from flowing into discharge line, causes wastage of material.
The operating pressure of described gas-phase fluidized-bed reactor is 2.0～2.4MPa.
In three layers of discharge gate, the effect of upper strata discharge gate and middle level discharge gate is to come into operation alone or in combination as just bearingDischarge under normal state, the effect of lower floor's discharge gate is to discharge cobbing, inspection inside reactor situation and other rowMaterial system auxiliary or supplement. Under deep condensation state, reactor enters high loaded process, a large amount of condensing agents,Adding of comonomer causes gas-solid in reactor to change mutually gas-solid-liquid three-phase into, especially in lower floor's discharge gate position,Condensing agent and comonomer just enter reactor with ciculation fluidized gas, and liquid phase proportion is higher, in the time of dischargeEasily be carried out, cause waste and loss, therefore lower floor's discharge gate is born discharge task hardly. Only forIn routine inspection every day or reactor, occur after fluctuation, row's part material from here, prevention has the cobbing equivalance of sinkingTired. If caking knot sheet occurs fluidized-bed reactor internal cause fault, fluid effect is destroyed, the bed of need to unstowing,So also there is as far as possible emptying reactor as much as possible fast, instead of picture only has lower floor's discharge gateTraditional design, prune job can only enter from top downwards slowly excavation, has not only reduced security risk, also greatlyCleaning efficiency is provided, has saved the production time.
Different according to changed condition in fluidized-bed reactor or effect, the sharing of load that the discharge gate of differing heights is bornCan regulate, such as fluidized-bed reactor is carrying out dry state production, and the wearability of resin powder own is strong,The marker method of so this design is more convenient flexibly, selects remaining large; If the resin of producing is that high melting refers toNumber or to fine powder sensitivity or between product grade transfer period in order to reduce Transition Materials, the row of so this designMaterial mode can stop path by more convenient shortening resin; If fluidized-bed reactor is carrying out deep condensation operation,Mean specific region more than fluid bed bottom distribution grid, have larger thermograde and reactant concentration gradient,Now discharge from traditional distribution grid still, so a large amount of liquid phase cryogens and comonomer also do not participate in reaction just byOutside discharge currents fluidized bed reactor. Not only destroy material balance and concentration of component control, also increased the weight of down-stream systemBurden, waste energy and the also shortcoming such as variation of the mobility of material consumption, resin powder. If adopt dedicated catalyst alsoIn fluidized-bed reactor, form multi-region, produce bimodal product, so more wish that resin powder discharges from top.
Compared with prior art, the utlity model has following advantage:
(1) reactor discharge gate is provided with upper strata discharge gate, middle level discharge gate and lower floor's discharge gate, and this is from allOn solved the discharging problem that reactor runs under the super frozen state of three-phase condition, carrying out the super condensation operation of three-phaseTime, by increasing upper strata or middle level load, reduce the not even method from bottom discharge, anti-with traditional designAnswer a large amount of liquid phases that exist in device bottom discharging to compare, that in the discharge of this layout design and discharging method, carries secretly is not anti-Answer liquid phase should reduce by 60% left and right, so just can guarantee, in the time that load improves, to ensure material fluidity, makeThe burden of downstream recovery system alleviates. Can also effectively save condensing agent, increase its refrigerating efficiency simultaneously.
(2) under three-phase condition, three layers of discharge gate also can be according to product needed, by regulating electronic rotation valveRotating speed is controlled the discharging sharing of load of diverse location, can obtain more desirable powder product, from middle andPortion's discharging can effectively reduce the time of staying of powder particle in reactor, obtains faster qualified powder and (estimatesBetween product grade transfer period, save switching time 30%～50%), further improve production capacity.
(3) design of lower floor's discharge gate can also be in the time of the abnormalities such as reactor occurs cruelly to gather, as urgent dischargeMouthful, can effectively discharge most of powder, facilitate device to process faster problem.
(4) discharge line that reactor discharge gate connects and the sidewall of gas-phase fluidized-bed reactor are 45 °～60 °Angle, for the impulsive force of pipeline outlet, protects powder when the powder that the pitch pipe design of twoport reduces is greatly dischargedThe granule size of material, can obtain desirable powder product, and the design of this gravity flow can be saved needs in a large numberThe traditional design of gas purging and corresponding auxiliary facility.
(5) by the independent use of three layers of discharge gate, or distribute associating use, or be used alternatingly, can changeThe movement locus of polymer in reactor, washes away wall thereby contribute to alleviate, and reduces fine powder and gathers and electrostatic hazardAnd tie sheet risk, be beneficial to the long-term operation of reactor. Simultaneously because of the stop path contracting of powder resin in fluid bedShort, thus the chance that wearing and tearing and fine powder produce reduced.
Brief description of the drawings
Fig. 1 is the gas-phase fluidized-bed reactor structural representation with discharge gate of the present utility model;
Fig. 2 is gas-phase fluidized-bed reactor structural representation of the present utility model;
Fig. 3 is the structure for amplifying schematic diagram of fluidized-bed reactor discharge gate of the present utility model.
In figure, 1 is gas-phase fluidized-bed reactor, and 12 is upper strata discharge gate, and 13 is middle level discharge gate, 14 be underLayer discharge gate, 15 is distribution grid, and 16 is plunger valve, and 17 is electronic rotation valve.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Embodiment 1
Taking the gas-phase fluidized-bed reactor of 300,000 tons of linear low density polyethylene (LLDPE)s of a set of annual output (LLDPE) as example,Its Design cooling load is generally 37.5T/HR, produces conventional unimodal LLDPE film product, and discharge per hour is about25 times, approximately 39 DEG C of fluid bed inlet temperatures, dump temperature is about 60～65 DEG C, its gas phase fluidization with discharge gateAs shown in Figure 1, described discharge gate is arranged on gas-phase fluidized-bed reactor 1 bed bioreactor 1, described dischargeMouth is provided with three layers, is respectively upper strata discharge gate 12, middle level discharge gate 13 and lower floor's discharge gate 14, each discharge gateBe equipped with and cut off with plunger valve 16, each plunger valve 16 connects an electronic rotation valve 17, controls by setting material levelThe rotary speed of electronic rotation valve 17 and rotation mode, thus withdrawal rate controlled. In gas-phase fluidized-bed reactor 1As shown in Figure 2, the operating pressure of gas-phase fluidized-bed reactor 1 is 2.0MPa to the gas-liquid-solid concentration of portion, from reactionDevice bottom is to reactor top, and the concentration of unstrpped gas reduces successively, and a part of unstrpped gas is in the bottom of reactorPolymerization reaction take place, unreacted polymerization completely particle with rising flow of feed gas on gas-phase fluidized-bed reactor 1 topContinue polymerization reaction take place, the unstrpped gas that part does not react is discharged also from gas-phase fluidized-bed reactor 1 topRecycle together with unstrpped gas and form recyclegas loop. The structure for amplifying schematic diagram of discharge gate is as Fig. 3Shown in, described upper strata discharge gate 12 is provided with 1, and this upper strata discharge gate 12 is positioned at gas-phase fluidized-bed normal operating80% position of charge level height, described middle level discharge gate 13 is provided with 1, and this middle level discharge gate 13 is positioned at40% position of gas-phase fluidized-bed normal operating charge level height, described lower floor's discharge gate 14 is provided with 1, shouldLower floor's discharge gate 14 is arranged in the distribution grid 15 0.2m places, top of reactor. Adopt relative multiply, pressure reduction is suitableIn, more small-bore, near continuous marker method, to reduce or to reduce because of discharge capacity, batch (-type) discharge greatly at every turnOn reactor component, material level, pressure, the isoparametric impact of temperature and impact, and to discharge system pipeline, establishCirculation impact and the stress influence of standby, valve and support structure thereof, thus security and reliability not only improved,Also reduce the design and manufacture cost of installations and facilities and valve. The withdrawal rate of described upper strata discharge gate 12 accounts for total rowThe 50wt% of material amount; The withdrawal rate of described middle level discharge gate 13 accounts for the 50wt% of total withdrawal rate; Described lower floorDischarge gate 14 is for discharging lower sinker material, and withdrawal rate is little, only for occurring in routine inspection every day or reactorAfter fluctuation, row's part material from here, prevention has the accumulation such as the cobbing of sinking. Described reactor discharge gate respectivelyBe connected with discharge line, the sidewall of this discharge line and reactor is 45° angle, and described plunger valve 16 is arranged onIn discharge line, rushing for pipeline outlet when the powder that the pitch pipe design of the discharge mouth of pipe reduces is greatly dischargedHit power and pulsating stress, the granule size of protection powder, can obtain desirable powder product, electronic rotation valve17 control can show and control in control system timely and effectively. Described plunger valve 16 has Chang Kai and Chang GuanThe two kinds of duties of working, in the time that discharge gate uses, plunger valve 16 is normally open, this gravity flow design canTo save the traditional design that needs a large amount of gas purgings and auxiliary facility thereof, in the time that discharge gate is stopped using, plunger valve 16For normal off status, when normal off status, plunger protrudes and extends to gas-phase fluidized-bed reactor 1 wall, and level and smooth with inwallWithout dead angle, prevent that reaction raw materials from flowing into discharge line, causes wastage of material.
Embodiment 2
Taking the gas-phase fluidized-bed reactor of 300,000 tons of linear low density polyethylene (LLDPE)s of a set of annual output (LLDPE) as example,Its Design cooling load is generally 37.5T/HR, produces conventional unimodal LLDPE film product, and discharge per hour is about25 times, approximately 39 DEG C of fluid bed inlet temperatures, dump temperature is about 60～65 DEG C, its gas phase fluidization with discharge gateAs shown in Figure 1, described discharge gate is arranged on gas-phase fluidized-bed reactor 1 bed bioreactor 1, described dischargeMouth is provided with three layers, is respectively upper strata discharge gate 12, middle level discharge gate 13 and lower floor's discharge gate 14, each discharge gateBe equipped with and cut off with plunger valve 16, each plunger valve 16 connects an electronic rotation valve 17, controls by setting material levelThe rotary speed of electronic rotation valve 17 and rotation mode, thus withdrawal rate controlled. In gas-phase fluidized-bed reactor 1As shown in Figure 2, the operating pressure of gas-phase fluidized-bed reactor 1 is 2.4MPa to the gas-liquid-solid concentration of portion, from reactionDevice bottom is to reactor top, and the concentration of unstrpped gas reduces successively, and a part of unstrpped gas is in the bottom of reactorPolymerization reaction take place, unreacted polymerization completely particle with rising flow of feed gas on gas-phase fluidized-bed reactor 1 topContinue polymerization reaction take place, the unstrpped gas that part does not react is discharged also from gas-phase fluidized-bed reactor 1 topRecycle together with unstrpped gas and form recyclegas loop. The structure for amplifying schematic diagram of discharge gate is as Fig. 3Shown in, described upper strata discharge gate 12 is provided with 3, and this upper strata discharge gate 12 is positioned at gas-phase fluidized-bed normal operating90% position of charge level height, described middle level discharge gate 13 is provided with 2, and this middle level discharge gate 13 is positioned at50% position of gas-phase fluidized-bed normal operating charge level height, described lower floor's discharge gate 14 is provided with 1, shouldLower floor's discharge gate 14 is arranged in the distribution grid 15 0.5m places, top of reactor. Adopt relative multiply, pressure reduction is suitableIn, more small-bore, near continuous marker method, to reduce or to reduce because of discharge capacity, batch (-type) discharge greatly at every turnOn reactor component, material level, pressure, the isoparametric impact of temperature and impact, and to discharge system pipeline, establishCirculation impact and the stress influence of standby, valve and support structure thereof, thus security and reliability not only improved,Also reduce the design and manufacture cost of installations and facilities and valve. The withdrawal rate of described upper strata discharge gate 12 accounts for total rowThe 80wt% of material amount; The withdrawal rate of described middle level discharge gate 13 accounts for the 20wt% of total withdrawal rate; Described lower floorDischarge gate 14 is for discharging lower sinker material, and withdrawal rate is little, only for occurring in routine inspection every day or reactorAfter fluctuation, row's part material from here, prevention has the accumulation such as the cobbing of sinking. Described reactor discharge gate respectivelyBe connected with discharge line, the sidewall of this discharge line and reactor is 60 ° of angles, and described plunger valve 16 is arranged onIn discharge line, rushing for pipeline outlet when the powder that the pitch pipe design of the discharge mouth of pipe reduces is greatly dischargedHit power and pulsating stress, the granule size of protection powder, can obtain desirable powder product, electronic rotation valve17 control can show and control in control system timely and effectively. Described plunger valve 16 has Chang Kai and Chang GuanThe two kinds of duties of working, in the time that discharge gate uses, plunger valve 16 is normally open, this gravity flow design canTo save the traditional design that needs a large amount of gas purgings and auxiliary facility thereof, in the time that discharge gate is stopped using, plunger valve 16For normal off status, when normal off status, plunger protrudes and extends to gas-phase fluidized-bed reactor 1 wall, and level and smooth with inwallWithout dead angle, prevent that reaction raw materials from flowing into discharge line, causes wastage of material.
Embodiment 3
Taking the gas-phase fluidized-bed reactor of 300,000 tons of linear low density polyethylene (LLDPE)s of a set of annual output (LLDPE) as example,Its Design cooling load is generally 37.5T/HR, produces conventional unimodal LLDPE film product, and discharge per hour is about25 times, approximately 39 DEG C of fluid bed inlet temperatures, dump temperature is about 60～65 DEG C, its gas phase fluidization with discharge gateAs shown in Figure 1, described discharge gate is arranged on gas-phase fluidized-bed reactor 1 bed bioreactor 1, described dischargeMouth is provided with three layers, is respectively upper strata discharge gate 12, middle level discharge gate 13 and lower floor's discharge gate 14, each discharge gateBe equipped with and cut off with plunger valve 16, each plunger valve 16 connects an electronic rotation valve 17, controls by setting material levelThe rotary speed of electronic rotation valve 17 and rotation mode, thus withdrawal rate controlled. In gas-phase fluidized-bed reactor 1As shown in Figure 2, the operating pressure of gas-phase fluidized-bed reactor 1 is 2.4MPa to the gas-liquid-solid concentration of portion, from reactionDevice bottom is to reactor top, and the concentration of unstrpped gas reduces successively, and a part of unstrpped gas is in the bottom of reactorPolymerization reaction take place, unreacted polymerization completely particle with rising flow of feed gas on gas-phase fluidized-bed reactor 1 topContinue polymerization reaction take place, the unstrpped gas that part does not react is discharged also from gas-phase fluidized-bed reactor 1 topRecycle together with unstrpped gas and form recyclegas loop. The structure for amplifying schematic diagram of discharge gate is as Fig. 3Shown in, described upper strata discharge gate 12 is provided with 2, and this upper strata discharge gate 12 is positioned at gas-phase fluidized-bed normal operating85% position of charge level height, described middle level discharge gate 13 is provided with 3, and this middle level discharge gate 13 is positioned at60% position of gas-phase fluidized-bed normal operating charge level height, described lower floor's discharge gate 14 is provided with 2, shouldLower floor's discharge gate 14 is arranged in the distribution grid 15 0.35m places, top of reactor. Adopt relative multiply, pressure reduction is suitableIn, more small-bore, near continuous marker method, to reduce or to reduce because of discharge capacity, batch (-type) discharge greatly at every turnOn reactor component, material level, pressure, the isoparametric impact of temperature and impact, and to discharge system pipeline, establishCirculation impact and the stress influence of standby, valve and support structure thereof, thus security and reliability not only improved,Also reduce the design and manufacture cost of installations and facilities and valve. The withdrawal rate of described upper strata discharge gate 12 accounts for total rowThe 100wt% of material amount; The withdrawal rate of described middle level discharge gate 13 accounts for the 0wt% of total withdrawal rate; Described lower floorDischarge gate 14 is for discharging lower sinker material, and withdrawal rate is little, only for occurring in routine inspection every day or reactorAfter fluctuation, row's part material from here, prevention has the accumulation such as the cobbing of sinking. Described reactor discharge gate respectivelyBe connected with discharge line, the sidewall of this discharge line and reactor is 52 ° of angles, and described plunger valve 16 is arranged onIn discharge line, rushing for pipeline outlet when the powder that the pitch pipe design of the discharge mouth of pipe reduces is greatly dischargedHit power and pulsating stress, the granule size of protection powder, can obtain desirable powder product, electronic rotation valve17 control can show and control in control system timely and effectively. Described plunger valve 16 has Chang Kai and Chang GuanThe two kinds of duties of working, in the time that discharge gate uses, plunger valve 16 is normally open, this gravity flow design canTo save the traditional design that needs a large amount of gas purgings and auxiliary facility thereof, in the time that discharge gate is stopped using, plunger valve 16For normal off status, when normal off status, plunger protrudes and extends to gas-phase fluidized-bed reactor 1 wall, and level and smooth with inwallWithout dead angle, prevent that reaction raw materials from flowing into discharge line, causes wastage of material.
In the time producing LLDPE, to compare with traditional fluid bed bottom discharging mouth, the gas content in discharge is approximatelyBe 18%25% (main component is ethene, hydrogen, nitrogen etc.), (main component is copolymerization to the liquid hydrocarbon of dissolvingMonomer and cryogen) content is about 100～300Kg/ bed m3. The apparent data of resin particle show, in powderFine powder (≤120 order) reduces more than 70%, and product grade switches minimizing 30%～50% consuming time; Accepted product percentage is aobviousWork improves; The withdrawal liquid amount of the lower recovery system of same load reduces approximately 60%.
Claims (9)
1. one kind is applicable to single gas-phase fluidized-bed reactor discharge gate of multi-region polymerisation, this discharge gate is arranged on gas-phase fluidized-bed reactor (1), it is characterized in that, described discharge gate is provided with three layers, be respectively upper strata discharge gate (12), middle level discharge gate (13) and lower floor's discharge gate (14), each discharge gate is equipped with and cuts off with plunger valve (16), and each plunger valve (16) connects an electronic rotation valve (17).
2. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 1, it is characterized in that, described upper strata discharge gate (12) is provided with 1～3,80%～90% position of material apparent height when this upper strata discharge gate (12) is positioned at gas-phase fluidized-bed normal operating.
3. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 1, it is characterized in that, described middle level discharge gate (13) is provided with 1～3,40%～60% position of material apparent height when this middle level discharge gate (13) is positioned at gas-phase fluidized-bed normal operating.
4. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 1, it is characterized in that, described lower floor's discharge gate (14) is provided with 1～2, and this lower floor's discharge gate (14) is arranged in 0.2～0.5m place, distribution grid (15) top of reactor.
5. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 1, is characterized in that, the withdrawal rate of described upper strata discharge gate (12) accounts for the 50wt%～100wt% of total withdrawal rate; The withdrawal rate of described middle level discharge gate (13) accounts for the 50wt%～0wt% of total withdrawal rate.
6. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 1, it is characterized in that, described reactor discharge gate is connected with respectively discharge line, the sidewall of this discharge line and reactor is 45 °～60 ° angles, and described plunger valve (16) is arranged in discharge line.
7. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 1, it is characterized in that, described plunger valve (16) has Chang Kai and normal two kinds of duties of pass work, in the time that discharge gate uses, plunger valve (16) is normally open, in the time that discharge gate is stopped using, plunger valve (16) is normal off status.
8. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 7, it is characterized in that, when the normal off status of described plunger valve (16), plunger protrude extend to gas-phase fluidized-bed reactor (1) wall, and with inwall smoothly without dead angle.
9. a kind of single gas-phase fluidized-bed reactor discharge gate that is applicable to multi-region polymerisation according to claim 1, is characterized in that, the operating pressure of described gas-phase fluidized-bed reactor (1) is 2.0～2.4MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170039A (en) * | 2015-10-14 | 2015-12-23 | 上海立得催化剂有限公司 | Single-gas-phase fluidized bed reactor discharging openings applicable to multiregion polyreaction |
| CN114599447A (en) * | 2019-10-25 | 2022-06-07 | 埃克森美孚化学专利公司 | Fluidized bed reactor system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170039A (en) * | 2015-10-14 | 2015-12-23 | 上海立得催化剂有限公司 | Single-gas-phase fluidized bed reactor discharging openings applicable to multiregion polyreaction |
| CN114599447A (en) * | 2019-10-25 | 2022-06-07 | 埃克森美孚化学专利公司 | Fluidized bed reactor system |
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