WO2014117632A1 - 利用旋流或离心场与压力梯度场耦合进行液体脱气的装置 - Google Patents

利用旋流或离心场与压力梯度场耦合进行液体脱气的装置 Download PDF

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WO2014117632A1
WO2014117632A1 PCT/CN2014/000028 CN2014000028W WO2014117632A1 WO 2014117632 A1 WO2014117632 A1 WO 2014117632A1 CN 2014000028 W CN2014000028 W CN 2014000028W WO 2014117632 A1 WO2014117632 A1 WO 2014117632A1
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cavity
liquid
gas
pressure gradient
swirling
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French (fr)
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杨强
许萧
王朝阳
卢浩
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East China University of Science and Technology
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East China University of Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0036—Flash degasification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
    • B01D19/0057—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused the centrifugal movement being caused by a vortex, e.g. using a cyclone, or by a tangential inlet

Definitions

  • This invention relates to a device for liquid degassing, and more particularly to a device for degassing a liquid by coupling a swirling or centrifugal field with a pressure gradient field.
  • the dissolved gas in the food industry affects the purity of the product, which in turn causes quality problems;
  • the presence of oxygen is the main cause of corrosion of thermal equipment (such as steam turbines, etc.), causing oxygen corrosion during operation or deactivation of the boiler; dissolved gases in products of the fine chemical industry may cause bubble defects in the product; Therefore, liquid degassing technology is widely used in the process industry and plays an important role.
  • the main techniques of liquid degassing are divided into physical and chemical methods.
  • the principle of physical methods is based on Henry's law (the solubility of gas in water is proportional to the partial pressure of the gas on the surface of the solution) and the law of Dalton's partial pressure law.
  • the total pressure is equal to the sum of the partial pressures of the constituent gases, and the partial pressure of the various components in the mixed gas is proportional to the mole fraction thereof.
  • the dissolved gas is pressed and removed, such as a blast type, a vacuum type, a membrane separation type, and the like.
  • the chemical formula mainly adds an adsorbent material to the liquid, and plays the purpose of degassing by reacting the adsorbent material with the dissolved gas in the liquid under the partial pressure.
  • the blast type and the vacuum type require a combination of a blower, a vacuum pump and a degassing tower (tank) to achieve the purpose of degassing, the floor space is large, the operating cost is relatively high, and the use range is basically normal pressure or low pressure working conditions. It has certain application limitations.
  • Membrane separation is based on the principle that the internal and external pressure difference gas can pass through the membrane and the liquid cannot pass through the membrane. It is not suitable for the degassing process containing solid impurities and medium and high pressure liquid.
  • the ultrasonic technology uses the cavitation of ultrasonic waves to increase the diameter and the rising speed of microbubbles in the fluid. Finally, it rises to the liquid surface and is discharged from the exhaust port, thereby eliminating the microbubbles existing in the fluid.
  • the swirling technique uses the difference of the liquid-phase two-phase density to realize the removal of trace gases in the liquid in the centrifugal field.
  • the cyclone degassing technology can be applied to the degassing of solid liquids and the degassing process of medium and high pressure.
  • the researchers also paid more attention and invented some crude oil cyclone removal in the oil field.
  • Gas three-phase separator and the use of certain structure to enhance the swirl degassing effect, such as the use of inverted cone structure to optimize the structure of the cyclone degasser (Zhang Yujie, Jiang Minghu, Zhao Lixin et al. CFD-based three-phase separation cyclone flow field Analysis and structural optimization. Chemical Machinery. 2010; Liu Xiaomin, Jiang Minghu, Zhao Lixin et al. Development and feasibility test of gas-liquid cyclone separation device. Fluid Machinery. 2004; Wang Yulun, Chang Zheng, Xu Lei et al. Degassing and sand removal integration Study on pressure characteristics and separation characteristics of cyclones.
  • the gas outlet has a large amount of liquid or liquid outlet gas, and it needs to be separated twice after the separator.
  • FIG. 2 is a schematic structural view of a conventional cyclone degasser.
  • An apparatus for performing liquid degassing by using a swirling or centrifugal field coupled with a pressure gradient field comprising: providing a cavity having a liquid gas inlet, a gas phase outlet, and a liquid phase outlet, the gas phase outlet being from the cavity The 1-3 times the maximum diameter of the cavity is inserted into the cavity.
  • the insertion depth is the end of the gas phase outlet, that is, the depth from the lowest end of the gas phase outlet located in the chamber to the upper surface of the chamber.
  • the cavity includes a cylindrical cavity, and a conical cavity or a cylindrical cavity disposed under the cylindrical cavity and having the largest diameter and communicating with the same.
  • the gas phase outlet is realized by an overflow pipe whose flow path is an injection chamber whose diameter gradually increases from the bottom to the top.
  • the end of the jet overflow pipe is provided with an annular gap slot.
  • the device is further provided with a cylinder surrounding the overflow tube to form a closed cavity, and the lower end of the closed cavity is provided with a secondary liquid phase outlet.
  • overflow pipe is further provided with a bell mouth at the end of the cavity portion.
  • the overflow pipe is further provided with an inverted cone thick wall deep into the peripheral wall of the end portion of the cavity portion, and the liquid gas inlet is higher than the bottom edge of the thick wall of the inverted cone.
  • the bottom of the cone cavity is provided with an inner vertebral body having a bottom surface area larger than a bottom surface area of the gas phase outlet extending to the end of the cavity portion.
  • liquid phase outlet adopts a tangential outlet, and the bottom of the outlet is flush with the bottom of the inner cone.
  • liquid gas inlet may be in the form of an axial flow, a tangential direction, a spiral line or an involute.
  • the beneficial effects of the invention are: designing an inverted conical gas phase outlet structure deep into the cavity of the swirling device, Taking full advantage of the influence of the pressure gradient in the cavity on the solubility of the gas in the liquid, the centrifugal field and the pressure gradient field are organically combined to remove the dissolved gas at the inlet partial pressure while removing the entrained gas; further optimized
  • the gas phase outlet structure, the structure of the overflow pipe wall annular groove slotting, the inverted cone thick wall and the like eliminates the problem of low removal efficiency due to fluctuations in inlet operating conditions, and can separate the liquid entrained in the gas outlet to solve
  • the gas outlet is additionally equipped with equipment for secondary separation; the gas discharge pressure is also increased. It has the advantages of simple structure and wide application range.
  • Figure 1 is a schematic view showing the structure of the device of the present invention.
  • FIG. 2 is a schematic structural view of a conventional cyclone degassing device.
  • Figure 3 is a schematic diagram showing the pressure gradient distribution of the cyclone degasser, including the schematic diagram of the swirl degassing device of Figure 3-1, and Figure 3-2, the radial pressure diagram of the cross-sectional view of the cyclone degassing device along the line A-A, 3-3 Simulation diagram of the radial gradient pressure gradient distribution of the cyclone degasser.
  • Fig. 4 is a structural schematic view showing the gas column shift and the gas column increase of the device of the present invention. Symbol Description
  • the inventor of the present invention found through the experimental study that, by the degassing device of the present invention, the liquid in the column is 0.5 to 3 times in the column cavity, and the liquid in the liquid inlet through the oblique flow is in the swirling flow.
  • the radial section in the device forms a significant pressure gradient, ie the radial position gradually decreases from the outside to the inside.
  • Henry's law near the height of the section, the liquid pressure of the outer wall of the cyclone is high and the center pressure is low.
  • the dissolved gas of the outer wall can migrate to the center position under the partial pressure, and the overflow gas phase outlet can be set at this position.
  • the dissolved gas in the liquid is further removed under the inlet pressure, and the current cyclone degassing technology is used to remove the entrained liquid by the centrifugal field to be combined with the centrifugal field and the pressure gradient field to remove the entrained liquid and the inlet liquid. Dissolved gas.
  • FIG. 1 is a schematic structural view of an apparatus for performing liquid degassing by using a swirling or centrifugal field and a pressure gradient field coupling
  • the apparatus includes a cone chamber 3 (also a column chamber) disposed at the bottom, and is disposed on a cylindrical cavity 2 above the cone cavity and having the largest diameter and communicating with the same, the cone cavity 3 and the column cavity 2 form a closed cavity, a liquid phase outlet 4 is arranged at the bottom of the closed cavity, and liquid gas is arranged at the upper part of the closed cavity
  • the inlet, the upper part of the closed cavity is provided with a gas phase outlet, the gas phase outlet is inserted into the closed cavity from the upper surface, the depth of the insertion is 0.1 to 3 times the maximum diameter of the cavity, and is disposed at the center of the cavity, and the gas outlet is inverted.
  • the bell mouth whose end section is opposite to the center position of the radial section pressure gradient field pressure In order to utilize as much as possible the pressure gradient to collect the gas phase that overflows due to the small center pressure.
  • the gas phase outlet is specifically realized by a second injection separation overflow pipe 9.
  • the injection secondary separation overflow pipe 9 is disposed on the central axis of the column chamber 2, and includes a bell mouth 9-1.
  • the flow tube column chamber 9-2 and the inverted cone connection chamber 9-3, and the second overflow tube column chamber 9-4 form a spray-shaped overflow chamber with a radius first decreasing and then increasing, which can be enlarged
  • the gas collection area increases the gas collection rate while increasing the gas phase outlet pressure.
  • An annular gap slot 8 is formed on the side of the second overflow tubular cavity 9-4.
  • the annular gap slot 8 has a cylinder 9-5 surrounding the overflow tube to form a closed cavity.
  • the bottom end of the body 9-5 is provided with a secondary liquid outlet 7 in the second overflow pipe column chamber 9-4, so as to effectively remove the liquid entrained by the gas by the centrifugal force of the gas, thereby realizing the effective separation of the entrained liquid in the gas. It eliminates the problem of secondary separation due to entrainment of liquid from the outlet gas.
  • the lower end of the first overflow cylinder chamber 9-2 is further provided with a bell mouth 9-1 to capture the overflow gas as large as possible.
  • the bell mouth 9-1 is provided with an overflow pipe inverted cone thick wall 6 on the circumferential side thereof, and the overflow pipe inverted cone thick wall 6 extends from the bell mouth 9-1 to the upper surface of the column chamber 2 so as to be guided from the cavity.
  • the liquid gas entering the liquid gas inlet at the upper part or the top of the body enters the area where the pressure gradient is significant as soon as the space is gradually increased, and the liquid gas is separated.
  • the above liquid gas inlet may be in the form of an axial flow, a tangential direction, a spiral line or an involute.
  • the bottom of the cone chamber 2 is provided with an inner vertebral body 5 having a bottom surface area larger than the bottom surface area of the gas phase outlet extending into the end of the cavity portion 9-1 of the cavity portion to reduce gas carrying in the outlet liquid.
  • FIG. 4 is a structural schematic diagram of the gas column offset and the gas column increase of the device of the present invention. Since the invention adopts the combination of the overflow pipe inverted cone thick wall 6 and the injection secondary separation overflow pipe 8, the gas phase capture efficiency can be greatly increased, and when the gas column is fluctuating, such as not at the center position, the gas column is increased, etc. In this case, the gas can be efficiently exported from the outlet, and the volume ratio of the imported gas to liquid is increased by 0 to 50%. When the amount of gas is small or the operation fluctuates, the gas outlet entrains the liquid out, and the gas entrained by the gas is centrifugally driven by the annular gap opening 8 provided in the second overflow pipe column chamber 9-4. Removal, thus overcoming the problem of the prior art equipment requiring secondary separation equipment for gas entrained liquid outside the cyclone degasser.
  • the specific application flow of the device is as follows:
  • the liquid containing the gas phase volume of 0-50% (the aforementioned liquid gas) enters the device from the axial flow inlet 1-1 or the tangential inlet 1-2 under a certain pressure, and the liquid gas will A part of the potential energy is converted into rotational kinetic energy to form a centrifugal field.
  • the gas entrained by the liquid migrates to the center of the column cavity 2; the gas dissolved by the inlet liquid under the partial pressure migrates under the action of the pressure gradient field to Spraying the central axis position where the secondary separation overflow pipe 9 is located, and mixing the gas separated from the centrifugal field at the flare port end position of the overflow pipe through the injection secondary separation overflow pipe 9, and discharging the liquid entrained by the gas.
  • the annular gap opening 8 of the overflow injection pipe 9 is subjected to secondary separation, and the purified gas is discharged from the upper opening of the second overflow pipe column chamber 9-4, and the entrained secondary liquid is discharged through the secondary liquid outlet 7
  • the purifying liquid other than the gas is discharged from the liquid phase outlet 4.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Cyclones (AREA)

Abstract

一种利用旋流或离心场与压力梯度场耦合进行液体脱气的装置，包括一腔体，腔体上设有液气进口（1-1，1-2）、气相出口和液相出口（4），气相出口从腔体上表面中心插入腔体内，插入深度为腔体最大直径的0.1〜3倍，气相出口通过一半径由下至上逐渐变大的溢流管实现，溢流管末端还进一步设置有一喇叭口（9-1），形成了一深入旋流装置腔体的倒锥形气相出口结构。

Description

利用旋流或离心场与压力梯度场耦合进行液体脱气的装置
技术领域
本发明涉及一种液体脱气的装置,尤其涉及一种利用旋流或离心场与压力梯度 场耦合进行液体脱气的装置。 发明背景
在石油化工、 煤化工、 食品、 水处理、 采油等行业存在大量液体脱气的过程， 高 效、 经济脱气技术对装置的高效、安全及长周期运转起着重要的作用。 如在石油化工 行业液体带压输送过程中由于管道压降致液体中溶解气析出， 产生气阻、局部腐蚀等 问题； 食品行业溶解气影响产品的纯度， 进而产生质量问题； 水处理过程中溶解氧的 存在是造成热力设备 (如汽轮机等)腐蚀的主要原因，导致锅炉在运行或停用期间的氧 腐蚀； 精细化工行业产品中溶解气会导致产品中有气泡缺陷； 等。 因此， 液体脱气技 术广泛应用在流程性行业中， 且起着重要的作用。
目前， 液体脱气的主要技术分为物理及化学两种方式， 物理方法的原理基础是亨 利定律（水中气体的溶解度与溶液表面该气体的分压成正比）与道尔顿分压定律气体 的总压等于组成该混合气体的分压的总和，混合气体中各种组份的分压又与其所占的 摩尔分数成正比）， 通过改变分压及气体组分含量进而对液体中在该分压下溶解气体 进行脱除， 如鼓风式、抽真空式、膜分离式等技术。 化学式主要是在液体中加入吸附 材料，通过吸附材料与该分压下液体中溶解气的反应，而起到脱气目的。由于鼓风式、 抽真空式需要鼓风机、 真空泵及脱气塔（罐）组合使用才能达到脱气目的， 占地面积 大、操作成本相对较高，且使用范围基本为常压或低压工况，有着一定的应用局限性； 膜分离是靠内外压差气体可通过膜而液体不能通过膜的原理进行脱气，不适用于含固 体杂质及中高压液体脱气过程。近些年随着科技的不断进步， 还出现了采用超声波及 旋流技术进行脱气的方法， 超声波技术利用超声波震荡的空穴作用， 使流体中的微气 泡的直径及上升速度不断增大， 最后升至液面， 从排气口排出， 从而消除了流体里存 在的微小气泡；而旋流技术则利用液气两相密度差在离心场中实现液体中微量气体的 脱除。
相比而言， 旋流脱气技术可应用在含固液体脱气及中高压脱气过程， 研究者也给 与了较多关注，并发明了一些应用于油田采油过程原油旋流脱沙脱气三相分离器以及 采用一定结构强化旋流脱气效果， 如采用倒锥结构对旋流脱气器结构进行优化等（张 玉洁，蒋明虎，赵立新等. 基于 CFD的三相分离旋流器流场分析与结构优化. 化工机械. 2010；刘晓敏，蒋明虎，赵立新等. 气液旋流分离装置的研制与可行性试验. 流体机械. 2004；王瀚伦,常征,徐磊等. 脱气除砂一体化旋流器压力特性与分离特性研究. 化工
确认本 装备技术. 2010; 蒋明虎，韩龙,赵立新等. 内锥式三相旋流分离器分离性能研究. 化 工机械. 2011 )。 由于旋流脱气采用液 -气两相密度差的原理进行分离， 因此旋流脱气 器内流场变化对离心场变化影响较大，进而影响到脱气效率， 如进口流量的波动会造 成旋流器内离心场大小的变化、进口含气量的变化等操作条件的变化都会影响到旋流 器内空气柱的粗细变化， 而在一定溢流口尺寸大小下， 空气柱粗细变化会直接导致气 体出口大量带液或者液体出口带气， 还需在分离器后进行二次分离。 请参阅图 2， 为 现有旋流脱气装置的结构示意图。 当进口流量低离心场较低， 形成气柱直径小于溢流 口尺寸， 气相出口会大量带液； 同样进口流量不变， 而进口气体夹带量降低后也会产 生该问题。 而进口流量增大或者进口气体含量增大时， 又会导致气柱直径增大， 导致 气相分离效率降低等问题。 另一方面， 以上研究者指出， 该技术设备应用在液体微量 带气的使用工况下， 不适用含气量较大时的使用工况。 发明内容
本发明的目的是克服上述现有技术的不足，提供了一种依靠旋流场或者离心场与 压力梯度场耦合技术进行液体高效脱气的设备。
具体方案如下：
一种利用旋流或离心场与压力梯度场耦合进行液体脱气的装置， 包括设有一腔 体， 该腔体上设有液气进口、气相出口和液相出口， 该气相出口从该腔体上表面中心 插入该腔体内，插入深度为该腔体最大直径的 0. 1-3倍。该插入深度为气相出口末端、 即位于腔体内的气相出口最低端至腔体上表面的深度。
进一步， 所述腔体包括一柱腔， 和一设置于柱腔之下、最大直径相同并与之连通 的锥腔或柱腔。
进一步所述气相出口通过一溢流管实现，该溢流管的流道为直径由腔下至上逐渐 变大的喷射腔。
进一步， 所述喷射溢流管末端设有环隙开槽。
进一步， 该装置还设有一筒体包围所述溢流管以形成一封闭的腔体， 该封闭腔体 下端开设有二次液相出口。
进一步， 所述溢流管深入腔体部分末端还设置有一喇叭口。
进一步， 所述溢流管深入所述腔体部分末端周壁上还设有一倒锥厚壁，所述液气 进口高于该倒锥厚壁的底边。
进一步， 该锥腔底部设有一内椎体， 该内锥体底面面积大于气相出口深入腔体部 分末端的底面面积。
进一步， 所述液相出口采用切向出口， 出口底部与内锥体底部平齐。
进一步， 所述液气进口可采用轴流式、 切向、 螺旋线或渐开线形式。
本发明的有益效果在于： 设计了一深入旋流装置腔体的倒锥形气相出口结构， 充分利用了腔体内压力梯度对液体中气体溶解度的影响，将离心场及压力梯度场有机 结合在一起， 在脱除液体夹带气的同时可脱除在入口分压下的溶解气； 进一步优化了 气相出口结构， 设置溢流管壁环隙开槽、倒锥厚壁等结构， 消除了由于入口操作条件 波动而造成的脱除效率低的问题， 并可将气体出口夹带的液体进行分离，解决了气体 出口另设设备进行二次分离问题； 还提高了气体排出压力。 具有结构简单， 应用范围 广的优点。 附图说明
图 1 为本发明装置结构示意图。
图 2为现有旋流脱气装置的结构示意图。
图 3为旋流脱气装置压力梯度分布示意图，包括图 3-1 旋流脱气装置结构示意图， 图 3-2旋流脱气装置沿 A- A剖线的剖视图的径向压力示意图，图 3-3旋流脱气装置径 向截面压力梯度分布仿真图。
图 4为本发明装置气柱偏移及气柱增大的结构示意图。 符号说明
其中， 1-1为 液气轴流式进口； 1-2为 液气切向进口； 2 为 柱腔； 3 为 锥腔； 4为 液相出口； 5 为 内锥体； 6 为 溢流管倒锥厚壁； 7 为 二次液出口； 8 为环形槽隙， 9 为喷射二次分离溢流管， 9-1 为 喇叭口，9-2 为 第一溢流管柱 腔, 9-3为 倒锥形连接腔， 9-4为 第二溢流管柱腔， 9-5 为筒体。 具体实施方式
请参阅图 3， 本专利发明者通过实验研究发现， 通过本发明的脱气设备， 在柱腔 高度为柱腔直径的 0. 5~3倍位置， 通过斜向液气进口的液体在旋流器内径向截面形成 显著的压力梯度， 即径向位置从外到内压力逐渐减小。 依据亨利定律， 在该截面高度 附近， 旋流器外边壁液体压力高、 中心压力低， 外边壁在该分压下溶解气体可迁移到 中心位置，将溢流气相出口设在该位置可将一定进口压力下液体中溶解的气体进一步 进行脱除，将目前旋流脱气技术利用离心场脱除夹带液体拓宽到利用离心场与压力梯 度场结合， 脱除夹带液体与进口液体一定分压下的溶解气体。
请参阅图 1， 为本发明利用旋流或离心场与压力梯度场耦合进行液体脱气的装置 的结构示意图， 该装置包括一设于底部的锥腔 3 (也可为柱腔）， 设于锥腔之上、最大 直径相同并与之连通的柱腔 2， 该锥腔 3和柱腔 2形成一封闭腔体， 封闭腔体底部设有 一液相出口 4， 封闭腔体上部设有液气进口， 封闭腔体上部设有一气相出口， 该气相 出口从上表面插入封闭腔体，插入的深度为腔体最大直径的 0. 1~3倍,并设置于腔体中 心， 气相出口为一倒喇叭口，其末端截面正对径向截面压力梯度场压力最小的中心位 置， 以便尽可能的利用压力梯度收集因中心压力较小而溢出的气相。该气相出口具体 通过一喷射二次分离溢流管 9实现， 如图所示， 该喷射二次分离溢流管 9设置于柱腔 2 中心轴上， 包括一喇叭口 9-1， 第一溢流管柱腔 9-2及一倒锥形连接腔 9-3， 和第二溢 流管柱腔 9-4,形成半径先减小后增大的喷射形溢流腔体， 可在加大气体收集面积， 提 高气体收集率的同时提高气相出口压力。 该第二溢流管柱腔 9-4周侧开设有环隙开槽 8,环隙开槽 8外设有一筒体 9-5包围所述溢流管以形成一封闭的腔体， 该筒体 9-5底端 开设有二次液出口 7， 在第二溢流管柱腔 9-4内， 以便利用气体旋转离心力将气体夹带 的液体进行有效脱除， 实现气体中夹带液体的有效分离， 可消除因出口气体夹带液体 而二次分离的问题。第一溢流管柱腔 9-2的下端还设有一喇叭口 9-1， 以尽可能大的捕 获溢出气体。 该喇叭口 9-1周侧设有一溢流管倒锥厚壁 6， 该溢流管倒锥厚壁 6从该喇 叭口 9-1一直至柱腔 2的上表面，以便引导从设置于腔体上部或顶部的液气进口进入的 液气由于空间逐渐增大尽快进入压力梯度显著的区域进行液气分离。上述液气进口可 采用轴流式、 切向、 螺旋线或渐开线形式。 该锥腔 2底部设有一内椎体 5， 该内锥体 5 底面面积大于气相出口深入腔体部分末端喇叭口 9-1的底面面积， 以降低出口液体中 气体携带。
请参阅图 4， 为本发明装置气柱偏移及气柱增大的结构示意图。 由于本发明采用 溢流管倒锥厚壁 6及喷射二次分离溢流管 8组合的形式， 可以大大增大气相捕获效率， 当气柱产生波动， 如不在正中心位置、气柱增大等情况下， 都仍可高效的将气体从出 口导出， 进口气液体积比范围增大为 0~50%。 而当气体量较小时或者操作波动时， 气 体出口会夹带液体出去，通过在第二溢流管柱腔 9-4上设置的环隙开槽 8， 利用气体旋 转离心力将气体夹带的液体进行有效脱除，这样就克服了以往设备需在旋流脱气器外 设置气体夹带液的二次分离设备的问题。
该装置的具体应用流程如下： 含气相体积为 0~50%的液体（前述液气）在一定压 力下从轴流式进口 1-1或者切向进口 1-2进入该装置，该液气将一部分势能转换为旋 转动能形成离心场，在离心场作用下，液体夹带的气体迁移运动到柱腔 2的中心位置； 入口液体在该分压下溶解的气体在压力梯度场的作用下迁移运动到喷射二次分离溢 流管 9所处的中心轴线位置，并在溢流管末端喇叭口截面位置与离心场分离出的气体 混合通过喷射二次分离溢流管 9导出，导出气体夹带的液体通过溢流喷射管 9的环隙 开槽 8进行二次分离， 净化后的气体从第二溢流管柱腔 9-4上部开口排出， 夹带回收 的二次液通过二次液出口 7排出， 脱除气体的净化液从液相出口 4排出。
综上所述仅为发明的较佳实施例而巳， 并非用来限定本发明的实施范围。 即凡依 本发明申请专利范围的内容所作的等效变化与修饰， 都应为本发明的技术范畴。

Claims

权利要求 、 一种利用旋流或离心场与压力梯度场耦合进行液体脱气的装置，包括一腔体， 该腔体上设有斜向液气进口、 气相出口和液相出口， 其特征在于， 该气相出口从 该腔体上表面中心插入该腔体内， 插入深度为该腔体最大直径的 0. 1-3倍。 、 如权利要求 1所述的利用旋流或离心场与压力梯度场耦合进行液体脱气的装 置， 其特征在于， 所述腔体包括一柱腔， 和一设置于柱腔之下、 最大直径相同并 与之连通的锥腔或柱腔。
、 如权利要求 1所述的利用旋流或离心场与压力梯度场耦合进行液体脱气的装 置， 其特征在于， 所述气相出口通过一溢流管实现， 该溢流管的流道为直径由腔 下至上逐渐变大的喷射腔。
、 如权利要求 3所述的利用旋流或离心场与压力梯度场耦合进行液体脱气的装 置， 其特征在于， 所述喷射溢流管末端设有环隙开槽。
、 如权利要求 3所述的利用旋流或离心场与压力梯度场耦合进行液体脱气的装 置， 其特征在于， 该装置还设有一筒体包围所述溢流管以形成一封闭的腔体， 该 封闭腔体下端开设有二次液相出口。
、 如权利要求 3所述的利用旋流或离心场与压力梯度场耦合进行液体脱气的装 置， 其特征在于， 所述溢流管深入腔体部分末端还设置有一喇叭口。
、 如权利要求 3所述的利用旋流或离心场与压力梯度场耦合进行液体脱气的装 置， 其特征在于， 所述溢流管深入所述腔体部分末端周壁上还设有一倒锥厚壁， 所述液气进口高于该倒锥厚壁的底边。
、 如权利要求 1〜6所述的利用旋流或离心场与压力梯度场耦合进行液体脱气的 装置， 其特征在于， 该锥腔底部设有一内椎体， 该内锥体底面面积大于气相出口 深入腔体部分末端的底面面积。
、 如权利要求 7任一所述的利用旋流或离心场与压力梯度场耦合进行液体脱气 的装置，其特征在于，所述液相出口采用切向出口，出口底部与内锥体底部平齐。
0、 如权利要求 1〜6任一所述的利用旋流或离心场与压力梯度场耦合进行液体脱 气的装置， 其特征在于， 所述斜向液气进口可采用轴流式、切向、 螺旋线或渐开 线形式。
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