CN204601655U - Column plate assembly falls in the gas distribution structure of iris type rectifying column and pressure regulation - Google Patents
Column plate assembly falls in the gas distribution structure of iris type rectifying column and pressure regulation Download PDFInfo
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- CN204601655U CN204601655U CN201520114631.6U CN201520114631U CN204601655U CN 204601655 U CN204601655 U CN 204601655U CN 201520114631 U CN201520114631 U CN 201520114631U CN 204601655 U CN204601655 U CN 204601655U
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Abstract
The utility model discloses a kind of gas distribution structure of iris type rectifying column, in the two side areas of dividing plate, between adjacent two sections of mass-transfer zones, be provided with some layers of pressure regulation along tower height direction fall column plate assembly, comprise column plate, riser, downspout, calotte, in the pipe of a wherein riser, be provided with a gas flowmeter; Tower wall is provided with charging aperture and adopt liquid mouth, and the circulation line adopted between liquid mouth and charging aperture is provided with fluid flowmeter, control valve and circulating pump, and adjacent pressure regulation is fallen in the region that formed between column plate and is equipped with Pressure gauge; The position of sensitive plate place of dividing plate left and right sides mass-transfer zone is provided with thermometer respectively; Technological parameter transfers to DCS, and circulating pump and control valve control by DCS.The utility model devises a kind of brand-new inner parts structure for energy consumption index, raw material composition, feed state, the isoparametric change of product quality, enhance partitioned column adaptive capacity and can handling.
Description
Technical field
The utility model relates to a kind of Chemical Engineering median septum partition in tower both sides gas flow and distributes and control system, particularly relates to a kind of high operating flexibility of gas-liquid mass transfer, sane type distribution of air flow and flow control system.
Background technology
Industrial rectification process process is the operating unit of highly energy-consuming, thus the engineer of world's every country and researcher are in research multicomponent mixture how low cost, the problem that low energy consumption is separated, extensively and in depth probe into various different process, equipment and operator scheme, particularly with the thermal coupling rectifying that dividing plate rectifying is representative, successfully achieve numerous industrialized unit, since 1985, BASF AG, Uop Inc., Kohn-Glitch company, Linde company, Kellogg company, Kyowa Yuka company, the companies such as Sunitomo heavy industry have brought into use iris type rectifying column, main application comprises three components separation, multicomponent separation, reactive distillation, extracting rectifying, azeotropic distillation etc.Because iris type rectifying column to have the tremendous economic advantage of low energy consumption, Low investment for multicomponent separation and special extract rectification, economic benefit is very remarkable, causes the extensive concern of countries in the world professional and technical personnel and scholar.
Iris type rectifying column is due to the complexity of its Structure and energy, create and more operate the free degree, energy-conservation and obtain highly purified product not a duck soup, need the controllability of internal system variable stronger, cause iris type rectifying column every control problem become and hinder a principal element of its commercial Application, particularly the uprising gas entered bottom partitioned column is distributed in dividing plate both sides, this apportioning cost affects product purity in distillation process and energy consumption, suitable gas apportioning cost not only can reduce the energy consumption of partitioned column, the purity of rectifying product can also be improved significantly, the focus that how air flow rate of both sides distributes and effectively control problem becomes industry concern.Relative to common rectifying column, iris type rectifying column needs to regulate dividing plate upper end to drop to the gas rising to dividing plate both sides at the bottom of the liquid of dividing plate both sides and tower simultaneously.Because gas distributes the series of computation process such as elevation computation, the dynamic analog of operating parameter, the analysis in gas-liquid two-phase flow field regulating and relate to complexity in dividing plate both sides, thus, there is very high difficulty in the distribution regulation and control of dividing plate both sides gas.
At present, generally adopt the mode that gas freely distributes in dividing plate both sides, the ratio freely distributed is determined by the operation operating mode in partitioned column internals (as packed height, the column plate number of plies, flow channel area etc.) and tower, and the uprising gas at the bottom of tower is automatically assigned to dividing plate both sides by following the equal rule of left and right sides pressure drop.Because feed composition and the change of state and the allocation proportion etc. of liquid all can become the key factor affecting gas and distribute, the gas flow ratio thus automatically distributed in dividing plate both sides usually can not reach the operating conditions of partitioned column optimum.
Another scheme that gas distributes regulation and control is that the special inner member of design is formed to change the pressure drop of dividing plate both sides the object regulating gas phase to distribute, or next door bias is placed.Such as, installing one piece in the bottom of dividing plate can the baffle plate of shift position, the circulation area of dividing plate both sides is changed by the change in location of this baffle plate, thus change gas phase distribution ratio, utilize inner member or next door bias is placed and change the pressure drop of dividing plate both sides, not only its operating flexibility is less, sensitivity is low, and moves the mechanical wear caused due to baffle plate, makes equipment can not long-period stable operation.
A kind of dividing plate fractionating column and gas-liquid flow amount control method thereof is disclosed in the PCT/US2011/056079 patent document that on March 5th, 2012 announces, as shown in Figure 1, this dividing plate fractionating column comprises tower body 100, gas phase is collected and distribution structure 200 and liquid phase collection and distribution structure 300, wherein, gas phase is collected and is distributed bypass gas phase pipeline 54a, 54b of mainly passing through with control valve 56a, 56b and flowmeter 58a, 58b outside tower, in conjunction with distribution and the control of automatic control realization gas.This technical scheme major defect is: first, all needs to arrange gas phase apparatus for redistributing in tower, so add the complexity of tower height and internals because gas phase extraction and gas phase enter in tower again; Secondly, for the partitioned column that production disposal ability is larger, the diameter of bypass gas phase pipeline 54a, 54b can be very large, and associated components is installed and maintenance inconvenience; Again, for bypass gas phase pipeline 54a, 54b with control valve 56a, 56b and flowmeter 58a, 58b, not only increase tower height, the characteristic of gas flow pressure drop also will become very complicated, downspout 48 liquid flooding that conference causes below dividing plate 120 is crossed in pressure drop, and system is by cisco unity malfunction; Finally, the size of control valve 56a, 56b changes along with unit scale, and investment will become very expensive, what is more important, in valve types of the prior art, almost do not have a kind of valve can fall in scope at lower drag and regulate and control gas phase flow rate sensitively and accurately.
The day for announcing is on June 4th, 2014, the patent No. be 201320829355.2 Chinese utility model patent disclose a kind of for the gas allocation device in partitioned column, as shown in Figure 2, flow detector 31, controller 33, cylindrical shell 24, dividing plate 22, square separate slot 26, downspout 27, inlet channel 25, square valve block governor motion 28, sleeve 29, rotating shaft 30, motor 32 and gas distribution mechanism 23 is adopted.The design defect that this device mainly exists comprises: it is irregular that first square valve block adjusting gas flow exists performance of control curve, is not easy to realize fine setting, and regulable control is regular poor, the defects such as tolerance is non-linear; Secondly, after tolerance feeds back to the mass-transfer zone on the upside of dividing plate 22, the resistance drop reaction of dividing plate 22 both sides gas can be delayed, negative-feedback is had after feeding back to controller 33, square valve block does not possess fine setting characteristic, square valve block governor motion can be caused constantly to perform positive negative regulator action, be difficult to realize sane adjustment; Again, owing to adopting square valve block to regulate aperture, after valve block, air-flow is based on turbulent flow form, and flow detector is difficult to accurately detect actual gas flow; Finally, owing to having drive disk assembly in tower, lubrication and wear problem are comparatively difficult to resolve certainly, and the long period that can affect equipment runs well.
Because iris type rectifying column thermal coupling technological operation variable is more, and many parameters intercouple, particularly the gas flow of dividing plate both sides and the physical relation of its dependent variable comparatively complicated, thus current domestic and international many scholars and researcher think that this parameter cannot become direct controlled variable, but the effective distribution of gas in dividing plate both sides and robust control are the important means ensureing product index and reduce energy consumption, if can not reach technology controlling and process target, so the advance of partitioned column and economy will heavy discounts greatly.Still there is many defects in domestic and international existing distribution of air flow control mode technical scheme, being badly in need of has advanced technological means to solve this industrial problem.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of gas distribution structure of iris type rectifying column, this gas distribution structure is simple, advantage of lower cost, utilize this gas distribution structure to carry out distributing and controlling, it is simple to operate, and flexible adjustment is reliable, highly sensitive, the steady running of rectifying column long period can be ensured.
In order to solve the problems of the technologies described above, the gas distribution structure of a kind of iris type rectifying column that the utility model proposes, this iris type rectifying column comprise tower wall, dividing plate, multistage mass-transfer zone, dcs DCS and at least one adopt liquid zone, described multistage mass-transfer zone comprises the public mass-transfer zone of stripping section being arranged on the left of the public mass-transfer zone of rectifying section above described dividing plate, dividing plate mass-transfer zone on the right side of mass-transfer zone, dividing plate and being arranged on below dividing plate; In described dividing plate two side areas, between adjacent two sections of mass-transfer zones, be provided with some layers of pressure regulation along tower height direction fall column plate assembly, described pressure regulation is fallen column plate assembly and is comprised pressure regulation and fall column plate, described pressure regulation is fallen on column plate and is penetratingly fixed with several downspouts and several riseies, and arranges higher than riser top according to described downspout top; The tube wall of downspout is provided with arranges liquid reducing hole more, and each riser is provided with the calotte of band sieve aperture; Respectively be provided with a gas flowmeter in the two side areas of described dividing plate, described gas flowmeter is positioned at the pipe of a riser; Tower wall is positioned at the top place that column plate falls in pressure regulation that column plate assembly falls in every layer of pressure regulation and is provided with a charging aperture respectively; Described adopt in liquid zone to be provided with funnel-shapedly rise gas cap column plate, described funnel-shaped liter between the side of gas cap column plate and described tower wall is provided with hydrops formula liquid-droping groove, Ta Bishang and the top place being positioned at described hydrops formula liquid-droping groove is provided with adopts liquid mouth;
Described position of adopting liquid zone comprise in following situation one or more:
1) fall between column plate assembly at the public mass-transfer zone of described stripping section and undermost pressure regulation;
2) below of column plate assembly falls in the orlop pressure regulation be positioned between adjacent mass-transfer zone;
3) below that column plate falls in pressure regulation that column plate assembly falls in pressure regulation is positioned at;
When the position of adopting liquid zone is said circumstances 1) time, described in adopt liquid mouth and be circumscribed with a circulating pump, all charging apertures are connected to described circulating pump respectively by a circulation line;
When the position of adopting liquid zone is said circumstances 2) time, described in adopt liquid mouth and be circumscribed with a circulating pump, all charging apertures in this adjacent mass-transfer zone are connected to described circulating pump respectively by a circulation line;
When the position of adopting liquid zone is said circumstances 3) time, the liquid mouth of adopting that described pressure regulation is fallen below column plate is circumscribed with a circulating pump, is positioned at the charging aperture that this pressure regulation falls above column plate and is connected to described circulating pump by a circulation line.
On every bar circulation line, self-circulating pump is provided with fluid flowmeter and control valve successively to charging aperture; Adjacent pressure regulation is fallen in the region that formed between column plate and is equipped with Pressure gauge; On the left of described dividing plate, on the right side of mass-transfer zone and dividing plate, the position of sensitive plate place of mass-transfer zone is provided with thermometer respectively; Above-mentioned all gas flowmeter, fluid flowmeter, Pressure gauge and thermometer are by Signal transmissions to described dcs DCS, and described circulating pump and control valve control by described dcs DCS.
The utility model also proposed a kind of pressure regulation for the distribution of iris type rectifying column gas and falls column plate assembly, this pressure regulation is fallen column plate assembly and is comprised pressure regulation and fall column plate, described pressure regulation falls column plate runs through several downspouts and several riseies, and arranges higher than riser top according to described downspout top; The tube wall of downspout is provided with arranges liquid reducing hole more, and each riser is provided with the calotte of band sieve aperture.
Compared with prior art, the beneficial effects of the utility model are:
(1) gas distribution structure of the iris type rectifying column in the utility model, adopts the equipment combination of conventional fluid transmission and control, technology maturation, is easy to realize; And the multi-signals such as pressure, flow and temperature can be gathered in real time, be convenient to the realization of full tower control program and strategy.
(2) the utility model gas distribution structure is used, it is the Pressure Drop difference by finely tuning region, the dividing plate left and right sides, change air flow rate by a small margin, also the resistance drop difference of both sides can significantly be adjusted, and then significantly adjust the flow of dividing plate both sides, thus the operating flexibility of the method is very large;
(3) have the rectifying column of the utility model gas distribution structure, in the course of work, Liquid Flow is even, can play the effect of gas-liquid distributor, thus saves space in tower;
(5) use the utility model gas distribution structure, without dynamic equipment in tower body, be not easy wearing and tearing and destroy, can long-term operation, be convenient to safeguard, dismounting and maintenance cleaning.
To sum up, the utility model is a kind of brand-new inner parts structure for system energy consumption index, raw material composition, feed state, the isoparametric change design of product quality, reduce the overall control difficulty of iris type rectifying column, enhance iris type rectifying column and control system thereof adaptive capacity and can handling.
Accompanying drawing explanation
Fig. 1 is the structural representation sketch of a kind of dividing plate fractionating column in prior art;
Fig. 2 is a kind of structural representation for the gas allocation device in partitioned column in prior art;
Fig. 3-1 is gas distribution structure embodiment 1 schematic diagram of the utility model dividing wall column;
Fig. 3-2 is gas distribution structure embodiment 2 schematic diagrames of the utility model dividing wall column;
Fig. 3-3 is gas distribution structure embodiment 3 schematic diagrames of the utility model dividing wall column;
Fig. 4 be in the utility model dividing wall column through pressure regulation column plate falls and rise entraining air stream flow trace schematic diagram;
Fig. 5-1 is riser and the calotte combining structure schematic appearance that in the utility model, column plate falls in pressure regulation;
Fig. 5-2 is riser and calotte combining structure sectional views that column plate falls in pressure regulation shown in Fig. 5-1;
Fig. 6 is the gas flow optimized schematic diagram of the utility model iris type rectifying column;
1-tower wall 2-funnel-shaped column plate 3-gas flowmeter
Column plate 5-riser 6-calotte falls in 4-pressure regulation
Mass-transfer zone on the left of 7-downspout 8-dividing plate 9-dividing plate
Mass-transfer zone 11-Pressure gauge 12-fluid flowmeter on the right side of 10-dividing plate
The public mass-transfer zone of 13-control valve 14-circulating pump 15-stripping section
16-liquid reducing hole 17-sieve aperture 18-bearing rib
Detailed description of the invention
Be described in further detail technical solutions of the utility model below in conjunction with the drawings and specific embodiments, described specific embodiment only explains the utility model, not in order to limit the utility model.
As shown in Fig. 3-1, Fig. 3-2 and Fig. 3-3, the gas distribution structure of a kind of iris type rectifying column of the utility model, this iris type rectifying column comprise tower wall 1, dividing plate 8, multistage mass-transfer zone, dcs DCS and at least one adopt liquid zone, described multistage mass-transfer zone comprises the public mass-transfer zone 15 of stripping section being arranged on the left of the public mass-transfer zone of rectifying section above described dividing plate 8, dividing plate mass-transfer zone 10 on the right side of mass-transfer zone 9, dividing plate and being arranged on below dividing plate 8; In the region of described dividing plate 8 both sides, between adjacent two sections of mass-transfer zones, be provided with some layers of pressure regulation along tower height direction fall column plate assembly.
Described pressure regulation is fallen column plate assembly and is comprised pressure regulation and fall column plate 4, described pressure regulation is fallen on column plate 4 and is penetratingly fixed with several downspout 7 and several riseies 5, according to the size of tower diameter and the size of tolerance thereof, the internal diameter of described riser 5 is 30mm-300mm, and according to the size of liquid measure, the height of plane on column plate 4 falls in top to the pressure regulation of riser 5 is 50mm-250mm.Downspout 7 and riser 5 are arranged higher than riser 5 top according to described downspout 7 top; The tube wall of downspout 7 is provided with many row's liquid reducing holes 16, described downspout 7 is inlaid in pressure regulation and falls on column plate 4, and the diameter of described liquid reducing hole 16 is 0.5-10mm, and the number of often arranging liquid reducing hole 16 is 1-5, the shape of described downspout 7 is square tube, the one in pipe and elliptical tube.Each riser 5 is provided with the calotte 6 of band sieve aperture 17, the bottom of this calotte 6 is provided with multiple bearing rib 18, as shown in Fig. 5-1 and Fig. 5-2, described calotte 6 is coaxial setting with the riser 5 at place, described calotte 6 is fallen column plate 4 with described pressure regulation and is welded and fixed by bearing rib 18, during welding, preferably fall between column plate 4 in the bottom of described calotte 6 and pressure regulation and leave gap, the gap in this gap is 5-30mm; Have the gap of 10-50mm between the top of described calotte 6 and the top of described riser 5, the shape of described sieve aperture 17 is the one in circular, square, rhombus and ellipse.Respectively be provided with a gas flowmeter 3 in the two side areas of described dividing plate, described gas flowmeter 3 is positioned at the pipe of a riser 5, according to temperature and pressure compensate, gas flowmeter 3 instantaneous transmission gas flow signals to dcs DCS, as shown in Figure 4.
Tower wall 1 is positioned at the top place that column plate 4 falls in pressure regulation that column plate assembly falls in every layer of pressure regulation and is provided with a charging aperture respectively, described adopt in liquid zone to be provided with funnel-shapedly rise gas cap column plate 2, described funnel-shaped liter between the side of gas cap column plate 2 and described tower wall 1 is provided with hydrops formula liquid-droping groove, on tower the wall 1 and top place being positioned at described hydrops formula liquid-droping groove is provided with one and adopts liquid mouth, and the frid height of described hydrops formula liquid-droping groove is 300-800mm.
Described position of adopting liquid zone comprise in following situation one or more:
1) adopting liquid zone falls between column plate assembly at the public mass-transfer zone of described stripping section and undermost pressure regulation, now, described in adopt liquid mouth and be circumscribed with a circulating pump 14, all charging apertures are connected to described circulating pump 14 respectively by a circulation line; As shown in figure 3-1.
2) adopt the below that column plate assembly falls in the liquid zone orlop pressure regulation be positioned between adjacent mass-transfer zone, now, described in adopt liquid mouth and be circumscribed with a circulating pump 14, all charging apertures in this adjacent mass-transfer zone are connected to described circulating pump 14 respectively by a circulation line; As shown in figure 3-2.
3) adopt liquid zone and be positioned at the below that column plate 4 falls in pressure regulation that column plate assembly falls in pressure regulation, now, the liquid mouth of adopting that described pressure regulation is fallen below column plate 4 is circumscribed with a circulating pump 14, is positioned at the charging aperture that this pressure regulation falls above column plate 4 and is connected to described circulating pump 14 by a circulation line; As shown in Fig. 3-3.
On every bar circulation line, self-circulating pump 14 to charging aperture is provided with fluid flowmeter 12 and control valve 13 successively; Adjacent pressure regulation fall between column plate 4 formed region in be equipped with Pressure gauge 11; On the left of described dividing plate, on the right side of mass-transfer zone 9 and dividing plate, the position of sensitive plate place of mass-transfer zone 10 is provided with thermometer respectively; Above-mentioned all gas flowmeter 3, fluid flowmeter 12, Pressure gauge 11 and thermometer are by Signal transmissions to described dcs DCS, and described circulating pump 14 and control valve 13 control by described dcs DCS.
As shown in Figure 6, described circulating pump 14 in the utility model gas distribution structure, control valve 13, flowmeter, Pressure gauge 11, the common coordinative role of thermometer and dcs DCS achieves the gas distribution of iris type rectifying column and controls, described dcs DCS controlled circulation pump 14 and control valve 13, described fluid flowmeter 12, gas flowmeter 3, current technological parameter is fed back to dcs DCS by Pressure gauge 11 and thermometer, described dcs DCS sends the instruction of controlled circulation pump 14 and control valve 13 again according to the technology controlling and process target of setting, till the technological parameter of feedback meets technology controlling and process target.In whole control procedure, the fluid flow change that column plate 4 falls in every layer of pressure regulation can control gas phase circulation area and gas-liquid contact form, and then converts vapor phase stream dynamic resistance to and fall, thus realizes the Effective Regulation of dividing plate 8 two side areas gas allocation proportion.
The course of work of the pressure drop regulable control of the utility model gas distribution structure, as shown in Figure 4, the liquid ability of falling of downspout 7 depends on the size of the liquid reducing hole 16 be arranged on downspout 7, number, position and height of liquid layer, therefore, when the size of downspout 7 and structure are determined, what mainly rely on height of liquid layer to affect downspout 7 falls liquid ability.In real time gas flow signals is transferred to dcs DCS by gas flowmeter 3, dcs DCS controls to adjust valve 13 and circulating pump 14.The liquid stream quantitative change controlled when control valve 13 is large, and flowing to from charging aperture the fluid flow that pressure regulation falls column plate 4 will increase, and the height of liquid layer H that pressure regulation is fallen on column plate 4 will increase.After height of liquid layer increases, a part of sieve aperture 17 on calotte 6 sidewall is just entirely flooded by liquid, thus, can supplied gas circulation sieve aperture number reduce, also just mean that gas flow area will reduce accordingly, the corresponding increase of gas flow resistance, namely column plate 4 pressure drop falls in pressure regulation increases.When liquid layer raises, when liquid level floods all sieve apertures 17, gas can only through liquid layer and through subsurface a part of sieve aperture 17, and the flow resistance coefficient of gas increases fast along with liquid layer thickness, and the pressure drop that column plate 4 falls in this layer of pressure regulation is risen thereupon fast.The synergy of riser 5, calotte 6 and downspout 7 in the utility model, its function mainly controls pressure regulation by height of liquid level change and falls plate pressure drop.Simultaneously, the pressure regulation liquid fallen above column plate assembly is circulated by recirculation assembly (valve etc. comprising circulation line and circulating pump and be arranged on circulation line), although gas-liquid two-phase can exist the state contacted with each other, be not used in heat and mass.Traditional gas-liquid mass transfer tower board is then that gas must pass liquid layer, after gas-liquid fully contacts, heat and mass occurs.Can obtain thus, no matter column plate assembly and traditional gas-liquid mass transfer tower board fall in the pressure regulation in the utility model is structurally or achieved being functionally all essentially different.
The dividing plate both sides gas regulating process with the iris type rectifying column of the utility model gas distribution structure is as follows:
As shown in Figure 6, described circulating pump 14 in the utility model gas distribution structure, control valve 13, flowmeter, Pressure gauge 11, the common coordinative role of thermometer and dcs DCS achieves the gas distribution of iris type rectifying column and controls, described dcs DCS controlled circulation pump 14 and control valve 13, described fluid flowmeter 12, gas flowmeter 3, current technological parameter is fed back to dcs DCS by Pressure gauge 11 and thermometer, described dcs DCS sends the instruction of controlled circulation pump 14 and control valve 13 again according to the technology controlling and process target of setting, till the technological parameter of feedback meets technology controlling and process target.In whole control procedure, the fluid flow change that column plate 4 falls in every layer of pressure regulation can control gas phase circulation area and gas-liquid contact form, and then converts vapor phase stream dynamic resistance to and fall, thus realizes the Effective Regulation of dividing plate 8 two side areas gas allocation proportion.
Further, when normally running, the Liquid distribution of iris type partition in tower 8 left and right sides and gas distribute all an optimum value interval, different with separation requirement according to material properties, and the scope width in interval, dividing plate 8 left and right sides is different.As common rectifying tower, iris type rectifying column can not keep steady state operation for a long time, but will according to the change of various external process parametric variable, mediate and control, such as, after feed composition changes, as shown in Fig. 3-1 and Fig. 6, need to regulate dividing plate left and right sides liquid L1, L2 allocation proportion, Liquid distribution will inevitably affect the gas flow resistance of the left and right sides than adjustment, and then affect dividing plate both sides air flow rate V1, V2, thus, need to utilize pressure regulation falling unit to adjust the distribution ratio of dividing plate both sides gas.Technological parameter in conjunction with dividing plate 8 both sides position of sensitive plate temperature (can be obtained by thermometer TIC01 and TIC02) and full tower (can by fluid flowmeter 12, Pressure gauge 11 and gas flowmeter 3 obtain) situation, select the control strategy of this iris type rectifying column, the pressure regulation of dividing plate 8 both sides is regulated to fall the liquid circulation amount in column plate region according to real-time data parameters dcs DCS, thus liquid layer thickness on column plate falls in control pressure regulation, the structure combined with riser 3 and calotte 6 matches, and then realize the target of regulation and control gas flow resistance and change distribution of air flow ratio.
Below for the structure of embodiment shown in Fig. 3-1, and different according to goal of regulation and control, be described in detail as follows:
On the left of embodiment 1, dividing plate, (gas flowmeter FIC02) gas flow of mass-transfer zone needs reduction by 30%.
First, start left side circulating pump P01, the control valve V10 in left side is opened by dcs (DCS), valve opening adjusts to 50%, column plate liquid level H is regulated at three layers of plate pressure drop in left side, column plate liquid level goes up to 100mm gradually from the normal value of 50mm, the sieve aperture 17 of calotte 6 is entirely flooded by liquid 50%, by DCS system PIC01, PIC02, PIC03, PIC09 monitors the pressure drop of three layers of column plate, every lamination falls and increases 120Pa gradually, control valve opening associates with gas phase flow rate and regulates, left gas flow V1 declines fast, monitoring TIC01, the reading of TIC02, after FIC02 display flow drop-out value is close to 20%, continue to regulate and control V10 by a small margin until system stability, after stable state maintains 10 minutes, stop regulation and control V10,
Then, control valve V08 is started by DCS, the situation of change of DCS system automatic monitoring flow FIC02, valve opening adjusts to 25%, the liquid level H of the second layer and third layer column plate is increased to 125mm from 100mm, the sieve aperture 17 of calotte 6 is entirely flooded by liquid 75%, and the pressure drop of second and third layer of column plate is increased to 150Pa gradually; When flow V1 drops to after 28% gradually, the reading of monitoring TIC01, TIC02, continues to regulate and control V10 by a small margin until system stability, after stable state maintains 10 minutes, stops regulation and control FICV10;
Finally, control valve V06 is started by DCS, the situation of change of system automatic monitoring flow FIC02, valve opening adjusts to 5%, the liquid level H of third layer column plate is increased to 130mm from 125mm, the sieve aperture 17 that calotte 6 on column plate falls in third layer pressure regulation is entirely flooded by liquid 80%, and the pressure drop of third layer column plate is increased to 170Pa gradually; When flow drops to after 30% gradually, system continues to regulate and control V06 by a small margin until system stability, the reading of monitoring TIC01, TIC02, after stable state maintains 10 minutes, stops regulation and control V06.
On the left of embodiment 2, dividing plate, (gas flowmeter FIC02) gas flow V1 of mass-transfer zone needs reduction by 20%, and gas flow (gas flowmeter FIC01) V2 on the right side of dividing plate increases by 20%.
First, left side circulating pump P01 is started by DCS, open the control valve V10 in left side, valve opening adjusts to 35%, column plate liquid level H is regulated at three layers of plate pressure drop in left side, column plate liquid level H goes up to 85mm from the normal value of 50mm, the sieve aperture 17 of calotte 6 is entirely flooded by liquid 35% gradually, pass through PIC01, PIC02, PIC03, PIC09 detects the pressure drop of three layers of column plate, three layers of every lamination of column plate fall and increase 80Pa gradually, control valve opening associates with gas phase flow rate and regulates, left gas flow V1 declines fast, monitor TIC01 simultaneously, the reading of TIC02, after FIC02 display flow drop-out value is close to 12%, continue to regulate and control V10 by a small margin until system stability, after stable state maintains 10 minutes, stop regulation and control V10,
Then, control valve V08 is started by DCS, the situation of change of DCS system automatic monitoring flow FIC02, valve opening adjusts to 15%, the liquid level H of the second layer and third layer column plate is increased to 110mm from 85mm, the sieve aperture 17 of calotte 6 is entirely flooded by liquid 60%, and the pressure drop of second and third layer of column plate is increased to 120Pa gradually; When flow drops to after 18% gradually, the reading of monitoring TIC01, TIC02, continues to regulate and control V10 by a small margin until system stability, after stable state maintains 10 minutes, stops regulation and control FICV10;
Finally, start control valve V06, the situation of change of DCS system automatic monitoring flow FIC02, valve opening adjusts to 5%, the liquid level H of third layer column plate is increased to 120mm from 110mm, the sieve aperture 17 that calotte 6 on column plate falls in third layer pressure regulation is entirely flooded by liquid 70%, and the pressure drop of third layer column plate is increased to 140Pa gradually; When flow V1 drops to after 30% gradually, system continues to regulate and control V06 by a small margin until system stability, the reading of monitoring TIC01, TIC02, after stable state maintains 10 minutes, stops regulation and control V06;
Embodiment 3, goal of regulation and control: on the left of dividing plate, (gas flowmeter FIC02) gas flow V1 of mass-transfer zone needs reduction by 5%.
First, left side circulating pump P01 is started by DCS, open the control valve V10 in left side, valve opening adjusts to 15%, column plate liquid level H is regulated at three layers of plate pressure drop in left side, column plate liquid level H goes up to 65mm from the normal value of 50mm, the sieve aperture 17 of calotte 6 is entirely flooded by liquid 15%, pass through PIC01, PIC02, PIC03, PIC09 monitors the pressure drop of three layers of column plate, three layers of every lamination of column plate fall and increase 50Pa, control valve opening associates with gas phase flow rate and regulates, left gas flow V1 declines fast, monitor TIC01 simultaneously, the reading of TIC02, after FIC02 display flow drop-out value is close to 4%, continue to regulate and control V10 by a small margin until system stability, after stable state maintains 10 minutes, stop regulation and control V10,
Then, control valve V06 is started by DCS, the situation of change of DCS system automatic monitoring flow FIC02, valve opening adjusts to 5%, the liquid level H of third layer column plate is increased to 85mm from 65mm, and the sieve aperture 17 of calotte 6 is entirely flooded by liquid 25%, and the pressure drop of third layer column plate is increased to 100Pa gradually; When flow drops to after 5% gradually, the reading of monitoring TIC01, TIC02, continues to regulate and control V06 by a small margin until system stability, after stable state maintains 10 minutes, stops regulation and control V06;
Embodiment 4, goal of regulation and control: on the left of dividing plate, mass-transfer zone (internals of the present embodiment mass-transfer zone are filler) capacity of returns L1 doubles, dividing plate left gas resistance increases, flow starts to decline, according to process control parameter, (gas flowmeter FIC02) gas flow on the left of dividing plate needs raising 20%.
First, right side circulating pump P02 is started by DCS, open the control valve V09 on right side, valve opening adjusts to 35%, column plate liquid level is regulated at three layers of plate pressure drop on right side, column plate liquid level H goes up to 85mm from the normal value of 50mm, the sieve aperture 17 of calotte 6 is entirely flooded by liquid 35% gradually, pass through PIC04, PIC05, PIC06, PIC10 monitors the pressure drop of three layers of column plate on the right side of dividing plate, three layers of every lamination of column plate fall and increase 80Pa gradually, control valve opening associates with gas phase flow rate and regulates, Top right gas flow V2 declines fast, monitor TIC01 simultaneously, the reading of TIC02, after FIC02 display flow rising value is close to 12%, continue to regulate and control V09 by a small margin until system stability, after stable state maintains 10 minutes, stop regulation and control V09,
Then, control valve V07 is started by DCS, the situation of change of DCS system automatic monitoring flow FIC02, valve opening adjusts to 15%, the liquid level H of the second layer and third layer column plate is increased to 110mm from 85mm, the sieve aperture 17 of calotte 6 is entirely flooded by liquid 60%, and the pressure drop of second and third layer of column plate is increased to 120Pa gradually; When flow rises to after 18% gradually, the reading of monitoring TIC01, TIC02, continues to regulate and control V07 by a small margin until system stability, after stable state maintains 10 minutes, stops regulation and control V07;
Finally, control valve V05 is started by DCS, the situation of change of DCS system automatic monitoring flow FIC02, valve opening adjusts to 5%, on the right side of dividing plate, the liquid level H of third layer column plate is increased to 120mm from 110mm, the sieve aperture 17 that calotte 6 on column plate falls in third layer pressure regulation is entirely flooded by liquid 70%, and the pressure drop of third layer column plate is increased to 140Pa gradually; When flow drops to after 30% gradually, system continues to regulate and control V05 by a small margin until system stability, the reading of monitoring TIC01, TIC02, after stable state maintains 10 minutes, stops regulation and control V05.
Although above-described embodiment is all for the structure of embodiment 1 shown in Fig. 3-1 and Fig. 6, but carry out gas distribution and control its principle being identical to the structure of the embodiment shown in Fig. 3-2 and Fig. 3-3, those skilled in the art can realize, and do not repeat them here.
Although be described the utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; when not departing from the utility model aim, can also make a lot of distortion, these all belong within protection of the present utility model.
Claims (9)
1. the gas distribution structure of an iris type rectifying column, this iris type rectifying column comprise tower wall (1), dividing plate (8), multistage mass-transfer zone, dcs DCS and at least one adopt liquid zone, described multistage mass-transfer zone comprises the public mass-transfer zone of stripping section (16) being arranged on the left of the public mass-transfer zone of rectifying section above described dividing plate, dividing plate mass-transfer zone (10) on the right side of mass-transfer zone (9), dividing plate and being arranged on below dividing plate; It is characterized in that:
In the two side areas of described dividing plate, between adjacent two sections of mass-transfer zones, be provided with some layers of pressure regulation along tower height direction fall column plate assembly, described pressure regulation is fallen column plate assembly and is comprised pressure regulation and fall column plate (4), described pressure regulation is fallen on column plate (4) and is penetratingly fixed with several downspouts (7) and several riseies (5), and arranges higher than riser top according to described downspout top; The tube wall of downspout (7) is provided with arranges liquid reducing hole (16) more, and each riser (5) is provided with the calotte (6) of band sieve aperture (17); Respectively be provided with a gas flowmeter (3) in the two side areas of described dividing plate, described gas flowmeter (3) is positioned at the pipe of a riser (5);
Tower wall is positioned at the top place that column plate (4) falls in pressure regulation that column plate assembly falls in every layer of pressure regulation and is provided with a charging aperture respectively;
Described adopt in liquid zone to be provided with funnel-shapedly rise gas cap column plate (2), described funnel-shaped liter between the side of gas cap column plate (2) and described tower wall is provided with hydrops formula liquid-droping groove, Ta Bishang and the top place being positioned at described hydrops formula liquid-droping groove is provided with adopts liquid mouth;
Described position of adopting liquid zone comprise in following situation one or more:
1) the public mass-transfer zone of described stripping section (15) is positioned at and undermost pressure regulation is fallen between column plate assembly;
2) below of column plate assembly falls in the orlop pressure regulation be positioned between adjacent mass-transfer zone;
3) below that column plate (4) fall in pressure regulation that column plate assembly falls in pressure regulation is positioned at;
When the position of adopting liquid zone is said circumstances 1) time, described in adopt liquid mouth and be circumscribed with a circulating pump (14), all charging apertures are connected to described circulating pump (14) respectively by a circulation line;
When the position of adopting liquid zone is said circumstances 2) time, described in adopt liquid mouth and be circumscribed with a circulating pump (14), all charging apertures in this adjacent mass-transfer zone are connected to described circulating pump (14) respectively by a circulation line;
When the position of adopting liquid zone is said circumstances 3) time, described pressure regulation fall column plate (4) below liquid mouth of adopting be circumscribed with a circulating pump (14), be positioned at this pressure regulation fall column plate (4) top charging aperture be connected to described circulating pump (14) by a circulation line;
On every bar circulation line, self-circulating pump to charging aperture is provided with fluid flowmeter (12) and control valve (13) successively; Adjacent pressure regulation fall between column plate (4) formed region in be equipped with Pressure gauge (11);
On the left of described dividing plate, on the right side of mass-transfer zone (9) and dividing plate, the position of sensitive plate place of mass-transfer zone (10) is provided with thermometer respectively;
Above-mentioned all gas flowmeter (3), fluid flowmeter (12), Pressure gauge (11) and thermometer are by Signal transmissions to described dcs DCS, and described circulating pump and control valve control by described dcs DCS.
2. the gas distribution structure of iris type rectifying column according to claim 1, it is characterized in that, the internal diameter of described riser (5) is 30mm-300mm, and the height that the upper plane of column plate (4) falls in top to the pressure regulation of described riser (5) is 50mm-250mm.
3. the gas distribution structure of iris type rectifying column according to claim 1, it is characterized in that, described calotte (6) is coaxial setting with the riser (5) at place, described calotte (6) and described pressure regulation are fallen column plate (4) and are fixed, the bottom of described calotte (6) and described pressure regulation are fallen between column plate (4) and are left gap, and the gap in this gap is 5-30mm; Have the gap of 10-50mm between the top of described calotte (6) and the top of described riser (5), the shape of described sieve aperture (17) is the one in circular, square, rhombus and ellipse.
4. the gas distribution structure of iris type rectifying column according to claim 1, it is characterized in that, described downspout (7) is inlaid in pressure regulation and falls on column plate (4), the diameter of described liquid reducing hole (16) is 0.5-10mm, the number of often arranging liquid reducing hole (16) is 1-5, the shape of described downspout (7) is square tube, the one in pipe and elliptical tube.
5. the gas distribution structure of iris type rectifying column according to claim 1, it is characterized in that, the frid height of described hydrops formula liquid-droping groove is 300-800mm.
6. one kind is fallen column plate assembly for the pressure regulation of iris type rectifying column gas distribution, it is characterized in that, this pressure regulation is fallen column plate assembly and is comprised pressure regulation and fall column plate (4), described pressure regulation falls column plate (4) runs through several downspouts (7) and several riseies (5), and arranges higher than riser (5) top according to described downspout (7) top; The tube wall of downspout (7) is provided with arranges liquid reducing hole (16) more, and each riser (5) is provided with the calotte (6) of band sieve aperture (17).
7. column plate assembly falls in the pressure regulation distributed for iris type rectifying column gas according to claim 6, it is characterized in that, the internal diameter of described riser (5) is 30mm-300mm, and the height that the upper plane of column plate (4) falls in top to the pressure regulation of described riser (5) is 50mm-250mm.
8. column plate assembly falls in the pressure regulation distributed for iris type rectifying column gas according to claim 6, it is characterized in that, described calotte (6) is coaxial setting with the riser (5) at place, described calotte (6) and described pressure regulation are fallen column plate (4) and are fixed, the bottom of described calotte (6) and pressure regulation are fallen between column plate (4) and are left gap, and the gap in this gap is 5-30mm; Have the gap of 10-50mm between the top of described calotte (6) and the top of described riser (5), the shape of described sieve aperture (17) is the one in circular, square, rhombus and ellipse.
9. column plate assembly falls in the pressure regulation distributed for iris type rectifying column gas according to claim 6, it is characterized in that, described downspout (7) is inlaid in pressure regulation and falls on column plate (4), the diameter of described liquid reducing hole (16) is 0.5-10mm, the number of often arranging liquid reducing hole (16) is 1-5, the shape of described downspout (7) is square tube, the one in pipe and elliptical tube.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114631.6U CN204601655U (en) | 2015-02-17 | 2015-02-17 | Column plate assembly falls in the gas distribution structure of iris type rectifying column and pressure regulation |
| PCT/CN2015/076403 WO2016131213A1 (en) | 2015-02-17 | 2015-04-13 | Gas distribution structure of distillation column and control method thereof |
| US15/679,766 US20170340985A1 (en) | 2015-02-17 | 2017-08-17 | Gas distribution structure for distillation column and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114631.6U CN204601655U (en) | 2015-02-17 | 2015-02-17 | Column plate assembly falls in the gas distribution structure of iris type rectifying column and pressure regulation |
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| CN204601655U true CN204601655U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520114631.6U Withdrawn - After Issue CN204601655U (en) | 2015-02-17 | 2015-02-17 | Column plate assembly falls in the gas distribution structure of iris type rectifying column and pressure regulation |
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| CN (1) | CN204601655U (en) |
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| CN104645655A (en) * | 2015-02-17 | 2015-05-27 | 天津奥展兴达化工技术有限公司 | Gas distribution structure of plate distillation column and control method of gas distribution structure |
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| CN111434367A (en) * | 2019-01-11 | 2020-07-21 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
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| CN104645655B (en) * | 2015-02-17 | 2018-03-09 | 天津奥展兴达化工技术有限公司 | The gas distribution structure and its control method of iris type rectifying column |
| CN104645655A (en) * | 2015-02-17 | 2015-05-27 | 天津奥展兴达化工技术有限公司 | Gas distribution structure of plate distillation column and control method of gas distribution structure |
| CN106310696A (en) * | 2016-10-31 | 2017-01-11 | 河北工业大学 | Gas phase distribution device of baffle plate tower |
| CN106310696B (en) * | 2016-10-31 | 2018-03-16 | 河北工业大学 | A kind of gas phase distributor of partitioned column |
| US11260317B2 (en) | 2017-11-14 | 2022-03-01 | Koch-Glitsch, Lp | Mass transfer assembly and column with dividing wall and methods involving same |
| CN111344050A (en) * | 2017-11-14 | 2020-06-26 | 科氏-格利奇有限合伙公司 | Mass transfer assembly and column with dividing wall and related method |
| CN109603185A (en) * | 2018-12-28 | 2019-04-12 | 中国二冶集团有限公司 | Pipe fitting method is crossed between two rectifying column platforms |
| CN111434367A (en) * | 2019-01-11 | 2020-07-21 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN111434366B (en) * | 2019-01-11 | 2021-12-17 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN111434367B (en) * | 2019-01-11 | 2021-12-17 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN111434366A (en) * | 2019-01-11 | 2020-07-21 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN113775604A (en) * | 2021-02-19 | 2021-12-10 | 太原理工大学 | Distributed pump control system and low-pressure-loss control method |
| CN113775604B (en) * | 2021-02-19 | 2023-07-25 | 太原理工大学 | Distributed pump control system and low-pressure loss control method |
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