CN206138958U - Attaches wall vibration pulsation adsorption equipment - Google Patents
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- 238000000034 method Methods 0.000 abstract description 26
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- 238000000746 purification Methods 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 7
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Abstract
本实用新型属于流体流动控制和传热传质技术领域,涉及一种附壁振荡脉动吸附装置与方法。本实用新型获得一种全新的附壁振荡脉动吸附装置与方法,能克服通常吸附装置与方法所存在的吸附剂床层截面流速不均匀、吸附剂吸附饱和度不均匀、和气体脱离吸附剂之后沿截面各点的分离或净化程度不一致等低效问题。可以比传统的吸附装置缩小容量和体积,节省吸附剂装填量。脱附阶段也依然使用高效的脉动流动,可以缩短脱附再生的时间,和节省脱附所消耗的高温惰性气体或洁净的工艺气体。
The utility model belongs to the technical field of fluid flow control and heat and mass transfer, and relates to a wall-attached oscillating pulsation adsorption device and method. The utility model obtains a brand-new wall-attached oscillating pulsation adsorption device and method, which can overcome the uneven flow velocity of the adsorbent bed section, the uneven adsorption saturation of the adsorbent, and the fact that the gas is separated from the adsorbent in the usual adsorption device and method. Inefficiencies such as inconsistent separation or purification levels at various points along the cross-section. Compared with the traditional adsorption device, the capacity and volume can be reduced, and the loading amount of the adsorbent can be saved. The high-efficiency pulsating flow is still used in the desorption stage, which can shorten the desorption regeneration time and save high-temperature inert gas or clean process gas consumed by desorption.
Description
技术领域technical field
本发明属于流体流动控制和传热传质技术领域,涉及一种射流振荡变压吸附装置。The invention belongs to the technical field of fluid flow control and heat and mass transfer, and relates to a jet oscillation pressure swing adsorption device.
背景技术Background technique
使用固体吸附剂吸附工艺气体中的特定组分,如CO2,水分等,达到分离和净化的目的,是石油化工、天然气等诸多工业生产中常用的工艺技术。随着社会生产力的发展,工业生产逐渐由粗放型向着精细型发展,生产设备的高效性越来越受到人们的重视。The use of solid adsorbents to adsorb specific components in process gases, such as CO2, moisture, etc., to achieve the purpose of separation and purification, is a commonly used process technology in many industrial productions such as petrochemical and natural gas. With the development of social productive forces, industrial production is gradually developing from extensive to refined, and the efficiency of production equipment has attracted more and more attention.
现有吸附技术和工艺大都是利用装载吸附剂填料颗粒的固定床,将待处理的工艺气体导入吸收罐,自下而上穿过填料层,将不需要的组分或杂质吸附留到吸附剂填料中,离开吸附剂的气体被分离或净化。Most of the existing adsorption technologies and processes use a fixed bed loaded with adsorbent filler particles to introduce the process gas to be treated into the absorption tank, pass through the packing layer from bottom to top, and adsorb unnecessary components or impurities to the adsorbent. In packing, the gas leaving the adsorbent is separated or purified.
为达到一定的吸附量,减少吸附剂脱附再生的次数,延长间歇生产的切换周期,吸附罐固定床的直径和和厚度普遍较大,由于进气口居中和吸附剂填料装填缺陷等因素,会导致工艺气体穿过填料的气速在吸附罐横截面各处不均匀,存在疏松畅流区和流动死角,气体离开填料层时的被吸附量或浓度不均等,之后在空腔室中又重新混合。这种不均匀流动将导致畅流区吸附剂的提早吸附饱和,而在其他区吸附剂还未失效之前,气体分离或净化的效果已经变差,而不得不提前开始切换脱附的操作。In order to achieve a certain amount of adsorption, reduce the number of desorption and regeneration of the adsorbent, and prolong the switching cycle of intermittent production, the diameter and thickness of the fixed bed of the adsorption tank are generally large. It will cause the gas velocity of the process gas passing through the packing to be uneven in the cross-section of the adsorption tank, and there will be loose and smooth flow areas and flow dead ends, and the adsorbed amount or concentration of the gas when it leaves the packing layer will be uneven. Remix. This uneven flow will lead to early adsorption saturation of the adsorbent in the free flow area, and before the adsorbent in other areas fails, the effect of gas separation or purification has deteriorated, and the desorption operation has to be switched in advance.
虽然增厚吸附剂床层可以延长吸附周期,但流动阻力要增大,增加了能耗,卸料吸附剂也困难。而上述同一截面气体速度不均和吸附剂吸附饱和浓度不均的想象依然存在,除了浪费设备容积,低饱和度的吸附剂也总是每次跟随着加温脱附再生,既浪费材料,也无端消耗能源。Although thickening the adsorbent bed can prolong the adsorption cycle, the flow resistance will increase, which will increase energy consumption and make it difficult to unload the adsorbent. However, the above-mentioned imagination of uneven gas velocity in the same cross-section and uneven adsorption saturation concentration of adsorbents still exists. In addition to wasting equipment volume, adsorbents with low saturation are always desorbed and regenerated with heating every time, which not only wastes materials, but also Unnecessary consumption of energy.
而对于吸附剂的脱附再生,一般都需要加温加热(和伴随降压)的惰性气体流过吸附剂床层,将已吸附的组分或杂质带走。这个过程中,除了气速不均、各处吸附剂脱附速率不等之外,还可能会发生局部过热问题,超过吸附剂耐受温度而使其过早失效。脱附再生效率低,也会多消耗宝贵的脱附再生气体。For the desorption regeneration of the adsorbent, it is generally necessary to heat the inert gas (and accompanied by depressurization) to flow through the adsorbent bed to take away the adsorbed components or impurities. In this process, in addition to the uneven gas velocity and the different desorption rates of the adsorbents, local overheating may also occur, exceeding the tolerance temperature of the adsorbent and causing it to fail prematurely. The desorption regeneration efficiency is low, and more precious desorption regeneration gas will be consumed.
发明内容Contents of the invention
本发明提供一种采用附壁振荡脉动流动提高气流均匀度的吸附装置,其创新点是使用N个高效的外激励式附壁振荡器,将工艺气体通过振荡转换成2N股占空比为1/2,频率相等,而起始相位各不相同的脉冲流,每一股脉冲流都单独从吸附罐上面的2N个或2N对(4N个,将圆周对向的管口两两并联成2N对,流动对称避免偏冲击)管口之一进入吸附罐。这样对于任意一个管口所对位的那部分吸附剂床层来说,承受和流过的都是一冲一断的脉冲流,其不断地起始加速增压冲击、和快速终止的储能和瞬间释放的振荡效应,能击通流动死区,极大程度地克服吸附剂床层内流速不均的问题。脉冲流动还能增大湍流程度,强化扩散,激扰减薄和打破吸附剂颗粒表面的气体附面层,增大表面浓度差梯度,使传质吸附能更快地进行。而从2N个或2N对入口进入,各股脉冲流进入吸附罐的方位和相位时差互相错开,可使床层受力对称均匀,避免偏斜冲击和振动。The invention provides an adsorption device that adopts wall-attached oscillating and pulsating flow to improve the uniformity of air flow. The innovation point is to use N high-efficiency externally excited wall-attached oscillators to convert process gas into 2N shares with a duty ratio of 1. /2, the frequency is equal, and the pulse flow with different starting phases, each pulse flow is separately from 2N or 2N pairs (4N) on the adsorption tank, and the circumferentially opposite nozzles are connected in parallel to form 2N Yes, flow symmetry to avoid partial impact) One of the nozzles enters the adsorption tank. In this way, for the part of the adsorbent bed that is opposite to any nozzle, what is subjected to and flows through is a pulse flow that is rushed and interrupted, which continuously starts to accelerate the boosting shock and quickly terminates the energy storage And the oscillation effect of instantaneous release can break through the flow dead zone and greatly overcome the problem of uneven flow velocity in the adsorbent bed. Pulse flow can also increase the degree of turbulence, strengthen diffusion, stimulate thinning and break the gas boundary layer on the surface of adsorbent particles, increase the gradient of surface concentration difference, and enable mass transfer and adsorption to proceed faster. When entering from 2N or 2N pairs of inlets, the azimuth and phase time difference of each pulse flow entering the adsorption tank are staggered, which can make the force on the bed symmetrical and even, and avoid deflection impact and vibration.
对于脱附再生操作,也采用同样的方式,只是改从吸附罐下面的2N个或2N对管口,一对一导入2N股脉动的脱附再生气流,穿过填料层后,从上面的管口流出。For the desorption and regeneration operation, the same method is also adopted, except that 2N or 2N pairs of nozzles under the adsorption tank are changed to introduce 2N pulsating desorption and regeneration airflows one by one. out of the mouth.
本发明的技术方案:Technical scheme of the present invention:
一种附壁振荡脉动吸附装置,是将工艺气体并联连通到N只高效外激励式附壁振荡器的入口,振荡器的2N个脉冲流出口,则各自连通到吸附罐上端空间,由2N块或4N块上空间分隔板分成的2N个或2N对相互隔断但不必密封的独立空间腔室中,腔室下端为吸附剂床层的上筛板和滤网,在筛板下,也设置4N/n(n=1~4)块与上空间分隔板对位、一定高度的填料上分隔板,将吸附剂床层的上部进行截面之间的隔断,以防止各股脉动气流寻找阻力最小路径流动和过早地相混。A wall-attached oscillating pulsation adsorption device, which connects the process gas in parallel to the inlets of N high-efficiency externally excited wall-attached oscillators, and the 2N pulse outlets of the oscillators are respectively connected to the upper space of the adsorption tank, consisting of 2N blocks Or in the 2N or 2N pairs of independent space chambers divided by 4N upper space partition plates that are separated from each other but not necessarily sealed, the lower end of the chamber is the upper sieve plate and filter screen of the adsorbent bed, and under the sieve plate, also set 4N/n (n = 1 ~ 4) blocks are aligned with the upper space partition plate, and the packing upper partition plate with a certain height separates the upper part of the adsorbent bed from the section to prevent the pulsating airflow from searching. The path of least resistance flows and mixes prematurely.
而对于再生操作,也采用与上述吸附操作相同的解决方案。For the regeneration operation, however, the same solution as for the adsorption operation described above is adopted.
本发明附壁振荡脉动吸附装置,其关键技术是采用高效的外激励气流振荡器,它使进入振荡器的气流交替地切换附壁、能够在其下游的两个分支流道内形成1/2占空比的脉冲流动,将脉冲流导入各个隔断独立的空间腔室,交替从截面的不同区域流进吸附剂床层,能达到各处均匀流动消除死区的作用。本发明所采用的N个气流振荡器,导入其振荡腔中激励主气流振荡的激励流,都是取自于相同压力的工艺气体,先经过交替开闭的换向调制换阀,生成两小股占空比接近1/2,相位差为T/2(T为振荡周期)的交替脉冲流,再分别导入振荡器两侧的两个激励流入口,从主气流两侧交替冲击和压迫使主气流弯曲和切换附壁。由于激励流的压力高,能自行膨胀纵向加速,因而基本不会造成主流的能量损失即小有压力降,而不是像传统自激励振荡器,如同喷射器那样,消耗主流体大量动能对降压了的自激励流进行动量传递加速,产生大的压力损失,这是本发明实用意义的关键所在。除此以外,外激励振荡可靠稳定和振荡频率的任意可调,可以到0.1Hz以下,振荡效率随频率降低会变得更高,而不是像自激励振荡器那样,只能产生对本工艺没有作用的上百Hz频率的振荡。这也是该方法能运用于吸附工艺的保证。The key technology of the wall-attached oscillating and pulsating adsorption device of the present invention is to use a high-efficiency externally excited airflow oscillator, which makes the airflow entering the oscillator alternately switch the attached wall, and can form a 1/2 occupancy in the two downstream branch channels. The empty-ratio pulse flow guides the pulse flow into each separated and independent space chamber, and alternately flows into the adsorbent bed from different areas of the cross section, which can achieve the effect of uniform flow everywhere and eliminate dead zones. The N airflow oscillators used in the present invention are introduced into the oscillation cavity to excite the main airflow to oscillate. The excitation flow is all taken from the process gas of the same pressure. The duty ratio is close to 1/2, and the alternating pulse flow with a phase difference of T/2 (T is the oscillation period) is respectively introduced into the two excitation flow inlets on both sides of the oscillator, and alternately impacts and compresses from both sides of the main airflow. Primary airflow bends and switches Coanda. Due to the high pressure of the excitation flow, it can self-expand and accelerate longitudinally, so it will basically not cause the energy loss of the main flow, that is, a small pressure drop, instead of consuming a large amount of kinetic energy of the main fluid to reduce the pressure like a traditional self-excited oscillator, like an ejector. The self-excited flow accelerates the momentum transmission and produces a large pressure loss, which is the key to the practical significance of the present invention. In addition, the external excitation oscillation is reliable and stable, and the oscillation frequency can be adjusted arbitrarily, which can be lower than 0.1Hz. The oscillation efficiency will become higher as the frequency decreases, instead of just producing no effect on the process like a self-excited oscillator. Oscillation of hundreds of Hz frequency. This is also the guarantee that the method can be applied to the adsorption process.
本发明所采用的高效外激励式气流振荡器,可以在高压低温吸附条件下,和低压高温脱附条件下同样使用,对流量、流速、压力、温度和膨胀比的适应性很宽泛。The high-efficiency externally excited airflow oscillator adopted in the present invention can be used under high-pressure low-temperature adsorption conditions and low-pressure high-temperature desorption conditions, and has wide adaptability to flow rate, flow rate, pressure, temperature and expansion ratio.
本发明采用气流振荡器,而不是使用其他切换方法产生脉动流,其原因是因换向调制阀只需处理工艺气总流量5~20%的小股气流用作为激励流,就可实现以这小股流控制大股流的振荡流动,从而能大大降低气流对动作切换单元的冲击。只需压力保持相等,激励用小股流的温度却不必与主气流相等,因而还能避免吸附低温和脱附高温工艺气体对激励流调制换向动作装置造成故障的可能性。The present invention adopts the airflow oscillator instead of using other switching methods to generate pulsating flow. The reason is that the reversing modulating valve only needs to process a small airflow of 5-20% of the total flow of process gas as the excitation flow, and this can be achieved. The small stream controls the oscillating flow of the large stream, thereby greatly reducing the impact of the airflow on the action switching unit. As long as the pressure remains equal, the temperature of the small flow for excitation does not have to be equal to that of the main flow, thus avoiding the possibility of malfunctions caused by the adsorption of low-temperature and desorption of high-temperature process gases to the excitation flow modulation reversing action device.
本发明附壁振荡脉动吸附装置,也可以像普通吸附装置和方法那样,采用多罐串联或并联操作。The wall-attached oscillating pulsation adsorption device of the present invention can also be operated in series or in parallel with multiple tanks like the common adsorption device and method.
本发明的有益效果:本发明获得一种全新的附壁振荡脉动吸附装置,它能克服通常吸附装置与方法所存在的吸附剂床层截面流速不均匀、吸附剂吸附饱和度不均匀、和气体脱离吸附剂之后沿截面各点的分离或净化程度不一致等低效问题。Beneficial effects of the present invention: the present invention obtains a brand-new wall-attached oscillating pulsation adsorption device, which can overcome the uneven cross-sectional flow velocity of the adsorbent bed, uneven adsorption saturation of the adsorbent, and gas Inefficiencies such as inconsistent separation or purification levels at various points along the cross-section after detaching from the adsorbent.
在同等处理量的条件下,本发明附壁振荡脉动吸附装置,可以比传统的吸附装置缩小容量和体积,节省吸附剂装填量。Under the condition of the same processing capacity, the wall-attached oscillating pulsation adsorption device of the present invention can reduce the capacity and volume compared with the traditional adsorption device, and save the loading amount of the adsorbent.
由于脱附阶段也依然使用高效的脉动流动,故本发明附壁振荡脉动吸附装置,可以缩短脱附再生的时间,和节省脱附所消耗的高温惰性气体或洁净的工艺气体。Since the high-efficiency pulsating flow is still used in the desorption stage, the wall-attached oscillating pulsation adsorption device of the present invention can shorten the desorption regeneration time and save high-temperature inert gas or clean process gas consumed by desorption.
附图说明Description of drawings
图1为本发明附壁振荡脉动吸附装置的各部件连接流程图。Fig. 1 is a connection flowchart of various components of the Coanda oscillating and pulsating adsorption device of the present invention.
图2为本发明附壁振荡脉动吸附装置中,吸附罐上盖和底部的一种上、下空间分隔板和管口方位示意图。Fig. 2 is a schematic diagram of the upper and lower space partition plates and nozzle orientations of the upper cover and the bottom of the adsorption tank in the wall-attached oscillating pulsation adsorption device of the present invention.
图3为本发明附壁振荡脉动吸附装置中,激励流调制器的一种实施结构简图。Fig. 3 is a schematic diagram of an implementation structure of the excitation flow modulator in the wall-attached oscillating pulsation adsorption device of the present invention.
图中:1原料气入口;2原料气开闭阀;3原料气振荡器入口;In the figure: 1 raw material gas inlet; 2 raw material gas opening and closing valve; 3 raw material gas oscillator inlet;
4原料气振荡器;5原料气激励流调制单元;6原料气振荡器分支出口;4 Raw material gas oscillator; 5 Raw gas excitation flow modulation unit; 6 Branch outlet of raw gas oscillator;
7吸附罐上管口;8上空间分隔板;9上筛板和滤网;10填料上分隔板;7 the upper nozzle of the adsorption tank; 8 the upper space partition plate; 9 the upper sieve plate and filter screen; 10 the upper partition plate of the filler;
11填料下分隔板;12下筛板和滤网;13下空间分隔板;14吸附罐下管口;11 The lower partition plate of packing; 12 The lower sieve plate and filter screen; 13 The lower space partition plate; 14 The lower nozzle of the adsorption tank;
15再生气振荡器分支出口;16再生气激励流调制单元;17再生气振荡器;15 Regenerated gas oscillator branch outlet; 16 Regenerated gas excitation flow modulation unit; 17 Regenerated gas oscillator;
18再生气振荡器入口;19再生气开闭阀;20再生气入口;18 Regeneration gas oscillator inlet; 19 Regeneration gas opening and closing valve; 20 Regeneration gas inlet;
21再生气振荡器激励流入口;22净化气出口开闭阀;23净化气出口;21 Regeneration gas oscillator excitation inlet; 22 Purified gas outlet opening and closing valve; 23 Purified gas outlet;
24吸附罐;25吸附剂填料;26吸附罐上盖;27再生气出口;24 adsorption tank; 25 adsorbent filler; 26 adsorption tank cover; 27 regeneration gas outlet;
28再生气出口开闭阀;29原料气振荡器激励流入口;30激励流出口;28 regeneration gas outlet opening and closing valve; 29 feed gas oscillator excitation inlet; 30 excitation outlet;
31机体;32半空心转轴;33固定缸套;34缸套侧壁开口;35轴侧壁开口。31 body; 32 semi-hollow rotating shaft; 33 fixed cylinder liners; 34 cylinder liner side wall openings; 35 shaft side wall openings.
具体实施方式detailed description
本发明附壁振荡脉动吸附装置的一种典型的实施方式描述如下,但不只局限于此种实施方式:A typical implementation of the wall-attached oscillating pulsation adsorption device of the present invention is described as follows, but not limited to this implementation:
本发明附壁振荡脉动吸附装置,其组成部件包括原料气开闭阀2,原料气振荡器4,原料气激励流调制单元5;上空间分隔板8,上筛板和滤网9,填料上分隔板10,填料下分隔板11,下筛板和滤网12,下空间分隔板13;再生气激励流调制单元16,再生气振荡器17,再生气开闭阀19,净化气出口开闭阀22;吸附罐24,吸附剂填料25,吸附罐上盖26;再生气出口开闭阀28;The wall-attached oscillating pulsation adsorption device of the present invention comprises a raw material gas on-off valve 2, a raw material gas oscillator 4, a raw material gas excitation flow modulation unit 5; an upper space partition plate 8, an upper sieve plate and a filter screen 9, and packing Upper partition plate 10, packing lower partition plate 11, lower sieve plate and filter screen 12, lower space partition plate 13; regeneration gas excitation flow modulation unit 16, regeneration gas oscillator 17, regeneration gas opening and closing valve 19, purification Gas outlet opening and closing valve 22; adsorption tank 24, adsorbent filler 25, adsorption tank cover 26; regeneration gas outlet opening and closing valve 28;
本发明的显著特点是:采用N(N=1~10)个原料气振荡器3,把从装置原料气入口1进来的含杂质气体的原料气,通过附壁振荡,变成2N股占空比为1/2间歇脉冲流动的气体,一对一从吸附罐上盖26开设的2N个、或是圆周对向两两并联的2N对吸附罐上管口7流进吸附罐24中。吸附罐24的上空间分隔板8,将上通流空间分隔成2N个、或是圆周对向两两并用的2N对独立的上空间分区,填料上分隔板10则将吸附剂填料25的上初始段分隔成4N/n个截面分区,并与各个上空间分区对位,使2N股或2N对股间歇脉冲流动的原料气,在上通流空间和填料上初始段只能沿着对各自限定的分隔空间流道流动和截止,从而避免流动死区;每一瞬时,有N股或N对股原料气按各自间跳排布的流动区域穿过吸附剂填料25,被净化后,穿过下筛板和滤网12,从2N个、或是圆周对向两两并联的2N对吸附罐下管口14流出,再通过2N个打开的净化气出口开闭阀22,从净化气出口23流出装置。The notable feature of the present invention is: N (N = 1 ~ 10) raw material gas oscillators 3 are used to convert the raw material gas containing impurity gas coming in from the raw material gas inlet 1 of the device into 2N shares by vibrating with the wall The gas with a ratio of 1/2 intermittent pulse flow flows into the adsorption tank 24 from the 2N pairs of adsorption tank upper cover 26 or the 2N pairs of nozzles 7 on the adsorption tank that are opposite to each other in parallel. The upper space partition plate 8 of the adsorption tank 24 divides the upper flow space into 2N, or 2N pairs of independent upper space partitions that are used in twos on the circumference. The upper initial section is divided into 4N/n cross-sectional partitions, and is aligned with each upper space partition, so that the raw material gas with 2N strands or 2N pairs of intermittent pulse flows can only be along the upper flow space and the packing. Flow and cut-off of the flow channels in the separate spaces defined separately, thereby avoiding the flow dead zone; at each moment, there are N streams or N pairs of feed gas flowing through the adsorbent filler 25 according to their respective intermittently arranged flow areas, and after being purified , pass through the lower sieve plate and filter screen 12, and flow out from 2N, or 2N pairs of adsorption tank lower nozzles 14 that are circumferentially opposite to each other in parallel, and then pass through 2N opened purification gas outlet opening and closing valves 22, from the purification Gas outlet 23 flows out of the device.
同样,再生操作也采用N(N=1~10)个再生气振荡器17,把从装置再生气入口20进来的再生气,通过附壁振荡,变成2N股占空比为1/2间歇脉冲流动的气体,一对一从吸附罐25底部开设的2N个、或是圆周对向两两并联的2N对吸附罐下管口14流进吸附罐24中,吸附罐24的下空间分隔板13,将下通流空间分隔成2N个、或是圆周对向两两并用的2N对独立的下空间分区,填料下分隔板11则将吸附剂填料25的下初始段分隔成4N/n个截面分区,并与各个下空间分区对位,使2N股或2N对股间歇脉冲流动的再生气体,在下通流空间和填料下初始段只能沿着对各自限定的分隔空间流道流动和截止,从而避免流动死区;每一瞬时,有N股或N对股再生气按各自间跳排布的流动区域穿过吸附剂填料25,吸附了杂质后,穿过上筛板和滤网9,从2N个、或是圆周对向两两并联的2N对吸附罐上管口7流出,再通过2N个打开的再生气出口开闭阀28,从再生气出口27流出装置。Similarly, the regeneration operation also uses N (N = 1 ~ 10) regeneration gas oscillators 17, and the regeneration gas coming in from the regeneration gas inlet 20 of the device is oscillated by the attached wall to become 2N shares with a duty ratio of 1/2 intermittent The pulsed gas flows into the adsorption tank 24 one by one from the 2N bottom openings of the adsorption tank 25, or the 2N pairs of the lower nozzles 14 of the adsorption tanks connected in parallel to each other on the circumference, and the lower space of the adsorption tank 24 is separated. The plate 13 divides the lower through-flow space into 2N, or 2N pairs of independent lower space partitions that are used in pairs opposite to each other on the circumference. n cross-sectional partitions, which are aligned with each lower space partition, so that the regeneration gas with intermittent pulse flow of 2N strands or 2N pairs of strands can only flow along the flow channels of the separate spaces defined for each in the lower flow space and the initial section of the filler. and cut-off, so as to avoid the flow dead zone; every moment, there are N strands or N pairs of regenerative gas flows through the adsorbent packing 25 according to their respective intermittently arranged flow areas, and after absorbing impurities, they pass through the upper sieve plate and filter The net 9 flows out from the upper nozzles 7 of 2N or 2N pairs of adsorption tanks that are circumferentially opposite in parallel, and then flows out of the device from the regeneration gas outlet 27 through the 2N regeneration gas outlet on-off valves 28 that are opened.
参看图3,原料气激励流调制单元5,和再生气激励流调制单元16,则主要由机体31、半空心转轴32、固定缸套33、激励流出口30以及气体入口、两端盖、轴承和密封等部件组成。Referring to Fig. 3, the raw material gas excitation flow modulation unit 5 and the regeneration gas excitation flow modulation unit 16 are mainly composed of a body 31, a semi-hollow rotating shaft 32, a fixed cylinder liner 33, an excitation outlet 30, a gas inlet, two end covers, and bearings. And seals and other components.
本发明附壁振荡脉动吸附装置,将原料气分出一小股进入原料气激励流调制单元5,被切换成2~2N(N越多,各股间歇脉冲流之间的相位差可更细分岔开)小股周期皆为T的间歇流动的脉冲激励流,按两两相位差为T/2的配对成1~N对,连通到N个原料气振荡器4的左、右共2N个原料气振荡器激励流入口29;若原料气振荡器激励流入口29的数量多于激励流股数,则将各原料气振荡器4分组与激励流股数相等,组内的原料气振荡器激励流入口29左和左、右和右并联。脉冲激励流激励各原料气振荡器4产生附壁切换振荡,每个原料气振荡器4都产生两股相位差为T/2、占空比为1/2的间歇脉冲流。所有原料气振荡器分支出口6出来的间歇脉冲流,根据脉冲激励流股数2~2N的不同,其最小相位差为T/2~T/2N。The wall-attached oscillating pulsation adsorption device of the present invention separates a small stream of raw material gas into the raw material gas excitation flow modulation unit 5, which is switched to 2 to 2N (the more N, the finer the phase difference between each intermittent pulse flow can be) Bifurcated) The pulse excitation flow of the intermittent flow of small streams with a period of T is paired into 1 to N pairs with a phase difference of T/2, and is connected to the left and right of N feed gas oscillators 4, a total of 2N Raw material gas oscillator excitation inflow port 29; If the quantity of raw material gas oscillator excitation inflow port 29 is more than the number of excitation streams, then each raw gas oscillator 4 groups are equal to the number of excitation streams, and the raw material gas in the group oscillates The device excitation inflow port 29 left and left, right and right are connected in parallel. The pulse excitation flow excites each feed gas oscillator 4 to generate wall switching oscillation, and each feed gas oscillator 4 generates two intermittent pulse flows with a phase difference of T/2 and a duty ratio of 1/2. For the intermittent pulse flow from the branch outlet 6 of all feed gas oscillators, the minimum phase difference is T/2-T/2N according to the number of pulse-excited streams 2-2N.
本发明附壁振荡脉动吸附装置,将再生气分出一小股进入再生气激励流调制单元16,被切换成2~2N小股周期皆为T的间歇流动的脉冲激励流,按两两相位差为T/2的配对成1~N对,连通到N个再生气振荡器17的左、右共2N个再生气振荡器激励流入口21;若再生气振荡器激励流入口21的数量多于激励流股数,则将再生气振荡器17分组与激励流股数相等,组内的再生气振荡器激励流入口21左和左、右和右并联。脉冲激励流激励各再生气振荡器17产生附壁切换振荡,每个再生气振荡器17都产生两股相位差为T/2、占空比为1/2的间歇脉冲流。所有再生气振荡器分支出口15出来的间歇脉冲流,根据脉冲激励流股数2~2N的不同,其最小相位差为T/2~T/2N;The wall-attached oscillating pulsation adsorption device of the present invention separates a small stream of regeneration gas into the regeneration gas excitation flow modulation unit 16, and is switched to a pulse excitation flow of 2 to 2N small strands whose period is T and is intermittently flowed according to two phases The pairs with a difference of T/2 form 1 to N pairs, which are connected to the left and right of N regenerative gas oscillators 17, and there are altogether 2N regenerative gas oscillator excitation inflow ports 21; if the number of regenerative gas oscillator excitation inflow ports 21 is large In terms of the number of excitation streams, the regeneration gas oscillators 17 are grouped to be equal to the number of excitation streams, and the regeneration gas oscillator excitation flow ports 21 in the group are connected in parallel between left and left, right and right. The pulse excitation flow excites each regeneration gas oscillator 17 to generate Coanda switching oscillation, and each regeneration gas oscillator 17 generates two intermittent pulse flows with a phase difference of T/2 and a duty ratio of 1/2. The minimum phase difference of the intermittent pulse flows coming out of the branch outlet 15 of all regeneration gas oscillators is T/2~T/2N according to the number of pulse excitation streams 2~2N;
参看图2,本发明附壁振荡脉动吸附装置,其吸附罐24内的上空间分隔板8,和填料上分隔板10,其中一种实施结构是将空间横截面按吸附罐24的中心向外辐射瓜分成相等大小的瓜瓣形状。上空间分隔板8的数量为4N瓣或是2N瓣,每瓣的形状皆为三个垂直边,一个半椭圆或半碟形、与吸附罐上盖26内壁曲率完全重合的单曲边直角四边形。各瓣上空间分隔板8辐射状组装或焊接后,固装或焊接到吸附罐上盖26的内壁;上空间分隔板8的高度,为在吸附罐上盖26盖装后,板下边紧贴于上筛板和滤网9的上表面。填料上分隔板10的数量为4N瓣或是2N瓣或是N瓣,各瓣形状皆为矩形,宽度等于吸附罐24的内半径,高度为吸附剂填料25高度的0~50%;各瓣填料上分隔板10辐射状组装或焊接后,与上空间分隔板8对位和埋进吸附剂填料25,其上边贴合于上筛板和滤网9的下表面。Referring to Fig. 2, the wall-attached oscillating pulsation adsorption device of the present invention, the upper space partition plate 8 in its adsorption tank 24, and the upper partition plate 10 on the filler, wherein a kind of implementation structure is to press the space cross section according to the center of the adsorption tank 24 The radiating melons are divided into equal-sized melon petal shapes. The number of the upper space partition plate 8 is 4N petals or 2N petals, and the shape of each petal is three vertical sides, a semi-elliptical or semi-disc shape, a single curved side right angle that completely coincides with the curvature of the inner wall of the adsorption tank cover 26 quadrilateral. After the space dividing plate 8 on each petal is radially assembled or welded, it is fixed or welded to the inner wall of the adsorption tank loam cake 26; Be close to the upper surface of upper sieve plate and filter screen 9. The number of partitions 10 on the filler is 4N or 2N or N, each of which is rectangular in shape, with a width equal to the inner radius of the adsorption tank 24 and a height of 0 to 50% of the height of the adsorbent filler 25; After the upper separation plate 10 of the petal filler is radially assembled or welded, it is aligned with the upper space separation plate 8 and embedded in the adsorbent filler 25, and its upper side is attached to the lower surface of the upper sieve plate and the filter screen 9.
本发明附壁振荡脉动吸附装置,其吸附罐24内的下空间分隔板13,和填料下分隔板11,其中一种实施结构是将空间横截面按吸附罐24的中心向外辐射瓜分成相等大小的瓜瓣形状;下空间分隔板13的数量为4N瓣或是2N瓣,每瓣的形状皆为三个垂直边,一个半椭圆或半碟形、与吸附罐24底部内壁曲率完全重合的单曲边直角四边形。各瓣下空间分隔板13辐射状组装或焊接后,固装或焊接到吸附罐24底部内壁;下空间分隔板13的高度,为板上边紧贴于下筛板和滤网12的下表面;填料下分隔板11的数量为4N瓣或是2N瓣或是N瓣,各瓣形状皆为矩形,宽度等于吸附罐24的内半径,高度为吸附剂填料25高度的0~50%;各瓣填料下分隔板11辐射状组装或焊接后,与下空间分隔板13对位安放或安装于下筛板和滤网12的上表面。In the wall-attached oscillating pulsation adsorption device of the present invention, the lower space partition plate 13 in the adsorption tank 24 and the lower partition plate 11 of the filler, one of the implementation structures is to divide the space cross-section according to the center of the adsorption tank 24 and radiate outwards. Become the shape of melon petals of equal size; the quantity of the lower space dividing plate 13 is 4N petals or 2N petals, and the shape of every petal is all three vertical sides, a semi-ellipse or semi-disc shape, and the curvature of the inner wall at the bottom of the adsorption tank 24 Perfectly coincident right-angled quadrilaterals. After the space dividers 13 under each petal are radially assembled or welded, they are fixed or welded to the inner wall of the bottom of the adsorption tank 24; Surface; the quantity of the partition plate 11 under the packing is 4N petals or 2N petals or N petals. ; After each flap packing lower partition plate 11 is radially assembled or welded, it is placed in alignment with the lower space partition plate 13 or installed on the upper surface of the lower sieve plate and filter screen 12 .
参看图3,本发明附壁振荡脉动吸附装置,其原料气激励流调制单元5,和再生气激励流调制单元16,其一种实施方式是将半空心转轴32的实心端穿出机体31的一端端盖用于由外界驱转;原料气或是再生气从机体31另一端部端盖引入,被半空心转轴32的空心端开口接受,半空心转轴32的各个不同圆周方位角的轴侧壁开口35,将随着半空心转轴32的转动,与固定缸套33各个不同圆周方位角的缸套侧壁开口34按各自不同的时差(相位差)周期地开通与关闭,从各个激励流出口30流出所需时差的2~2N股脉动激励流。调节半空心转轴32的转速,即可控制原料气振荡器4、或是再生气振荡器17的附壁振荡频率。Referring to Fig. 3, the Coanda oscillating and pulsating adsorption device of the present invention, its feed gas excitation flow modulation unit 5, and regeneration gas excitation flow modulation unit 16, one embodiment is to pass the solid end of the semi-hollow shaft 32 out of the body 31 One end cover is used to be driven by the outside; the raw material gas or regeneration gas is introduced from the other end cover of the body 31, and is received by the hollow end opening of the semi-hollow rotating shaft 32, and the shaft sides of the semi-hollow rotating shaft 32 with different circumferential azimuth angles The wall opening 35, with the rotation of the semi-hollow rotating shaft 32, will be opened and closed periodically with the cylinder liner side wall openings 34 with different circumferential azimuth angles of the fixed cylinder liner 33 according to different time differences (phase differences) respectively, from each excitation flow Outlet 30 flows out 2-2N pulsating excitation streams with required time difference. Adjusting the rotational speed of the semi-hollow shaft 32 can control the Coanda oscillation frequency of the feed gas oscillator 4 or the regeneration gas oscillator 17 .
本发明附壁振荡脉动吸附装置的工作原理叙述如下:The operating principle of the wall-attached oscillating pulsation adsorption device is described as follows:
吸附阶段:再生气开闭阀19和再生气出口开闭阀28关闭,原料气开闭阀2和净化气出口开闭阀22打开。待分离净化的原料气从装置的原料气入口1进入,通过打开的原料气开闭阀2,同时进到N个原料气振荡器入口3。另有一小股进到原料气激励流调制单元5中,被切换调制成2N股或N股或N/2股不同时差的激励流;将时差为T/2的激励流组对,每一对都连接到一个或两个、或4个并联的原料气振荡器4的左、右原料气振荡器激励流入口29,激励进入原料气振荡器入口3的原料气产生附壁振荡,交替地从原料气振荡器4的左、右两个原料气振荡器分支出口6排出原料气振荡器4,再通过原料气振荡器分支出口6各自所对应连接的吸附罐上管口7,进到上空间分隔板8分隔成的各自独立的上空间分区,然后穿过该分区范围对应的上筛板和滤网9的限定面积,进到吸附剂填料25中,且在填料上分隔板10的约束下,继续在分区内向下流动穿过吸附剂填料25,直至超过填料上分隔板10的高度,才向其他区域扩散。脉冲流动的原料气的杂质组分在吸附剂填料25中被分离净化,净化气穿过下筛板和滤网12,以及吸附罐24底部下通流空间,从吸附罐下管口14流出吸附罐24;再通过打开的净化气出口开闭阀22,从净化气出口23流出装置。Adsorption stage: the regeneration gas on-off valve 19 and the regeneration gas outlet on-off valve 28 are closed, the raw gas on-off valve 2 and the purified gas outlet on-off valve 22 are opened. The raw gas to be separated and purified enters from the raw gas inlet 1 of the device, passes through the opened raw gas on-off valve 2, and enters the N raw gas oscillator inlets 3 at the same time. Another small stream enters the raw material gas excitation flow modulation unit 5, and is switched and modulated into 2N or N or N/2 excitation flows with different time differences; the excitation flow with a time difference of T/2 is paired, and each pair Both are connected to one or two, or the left and right raw gas oscillators of 4 parallel raw gas oscillators 4 excite the inflow port 29, and the raw material gas entering the raw gas oscillator inlet 3 is excited to generate Coanda oscillation, alternately from The left and right raw material gas oscillator branch outlets 6 of the raw material gas oscillator 4 discharge the raw material gas oscillator 4, and then enter the upper space through the upper nozzles 7 of the adsorption tanks connected to the respective corresponding connection of the raw material gas oscillator branch outlets 6 The separate upper space partitions separated by the partition plate 8 then pass through the limited area of the upper sieve plate and the filter screen 9 corresponding to the partition range, and enter the adsorbent packing 25, and the partition plate 10 on the packing Constrained, it continues to flow down through the adsorbent packing 25 in the partition until it exceeds the height of the separation plate 10 on the packing before diffusing to other regions. The impurity components of the pulse-flowing raw gas are separated and purified in the adsorbent filler 25, and the purified gas passes through the lower sieve plate and filter screen 12, and the lower flow space at the bottom of the adsorption tank 24, and flows out from the lower nozzle 14 of the adsorption tank. Tank 24; then through the opened purification gas outlet on-off valve 22, the device flows out from the purification gas outlet 23.
再生阶段:原料气开闭阀2和净化气出口开闭阀22关闭,再生气开闭阀19和再生气出口开闭阀28打开。纯净再生气从装置的再生气入口20进入,通过打开的再生气开闭阀19,同时进到N个再生气振荡器入口18。另有一小股进到再生气激励流调制单元16中,被切换调制成2N股或N股或N/2股不同时差的激励流;将时差为T/2的激励流组对,每一对都连接到一个或两个、或4个并联的再生气振荡器17的左、右再生气振荡器激励流入口21,激励进入再生气振荡器入口18的再生气产生附壁振荡,交替地从再生气振荡器17的左、右两个再生气振荡器分支出口15排出再生气振荡器17,再通过再生气振荡器分支出口15各自所对应连接的吸附罐下管口14,进到下空间分隔板13分隔成的各自独立的下空间分区,然后穿过该分区范围对应的下筛板和滤网12的限定面积,进到吸附剂填料25中,且在填料下分隔板11的约束下,继续在分区内向上流动穿过吸附剂填料25,直至超过填料下分隔板11的高度,才向其他区域扩散。脉冲流动的再生气将在吸附剂填料25中所吸附的杂质脱附并携带走,穿过上筛板和滤网9,以及吸附罐24上部上通流空间,从吸附罐上管口7流出吸附罐24;再通过打开的再生气出口开闭阀28,从再生气出口27流出装置。Regeneration stage: raw gas on-off valve 2 and purified gas outlet on-off valve 22 are closed, regeneration gas on-off valve 19 and regeneration gas outlet on-off valve 28 are opened. The pure regeneration gas enters from the regeneration gas inlet 20 of the device, passes through the opened regeneration gas on-off valve 19, and enters the N regeneration gas oscillator inlets 18 at the same time. Another small stream enters the regeneration gas excitation flow modulation unit 16, and is switched and modulated into 2N or N or N/2 excitation flows with different time differences; the excitation flow with a time difference of T/2 is paired, and each pair Both are connected to one or two, or the left and right regeneration gas oscillators of 4 parallel regeneration gas oscillators 17 excite the inflow port 21, and stimulate the regeneration gas entering the regeneration gas oscillator inlet 18 to generate Coanda oscillation, alternately from The left and right two regeneration gas oscillator branch outlets 15 of the regeneration gas oscillator 17 are discharged from the regeneration gas oscillator 17, and then enter the lower space through the lower nozzles 14 of the adsorption tanks respectively connected to the regeneration gas oscillator branch outlets 15. The separate lower space partitions separated by the partition plate 13 then pass through the limited area of the lower sieve plate and the filter screen 12 corresponding to the partition range, and enter the adsorbent packing 25, and the partition plate 11 under the packing Constrained, it continues to flow upwards through the adsorbent packing 25 in the partition until it exceeds the height of the partition plate 11 under the packing before diffusing to other regions. The pulse-flowing regeneration gas desorbs and carries away the impurities adsorbed in the adsorbent packing 25, passes through the upper sieve plate and filter screen 9, and the upper flow space on the upper part of the adsorption tank 24, and flows out from the upper nozzle 7 of the adsorption tank Adsorption tank 24; then through the opened regeneration gas outlet on-off valve 28, the device flows out from the regeneration gas outlet 27.
本发明附壁振荡脉动吸附装置与方法的运行参数范围如下:The scope of operating parameters of the wall-attached oscillating pulsation adsorption device and method of the present invention is as follows:
操作气压力范围:0.01~40MPa;Operating air pressure range: 0.01~40MPa;
工艺气体流量:0.1~10000Nm3/hrProcess gas flow rate: 0.1~10000Nm 3 /hr
脉冲流振荡频率:0.1~100Hz。Pulse flow oscillation frequency: 0.1 ~ 100Hz.
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