CN100395002C - A device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase - Google Patents

A device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase Download PDF

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CN100395002C
CN100395002C CNB2005101236347A CN200510123634A CN100395002C CN 100395002 C CN100395002 C CN 100395002C CN B2005101236347 A CNB2005101236347 A CN B2005101236347A CN 200510123634 A CN200510123634 A CN 200510123634A CN 100395002 C CN100395002 C CN 100395002C
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liquid
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separating
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CN1966122A (en
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郑之初
吴应湘
张军
郭军
周永
唐驰
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Institute of Mechanics of CAS
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Abstract

本发明的一种气液和液液分流器,涉及一种将不同的流体分离的装置,特别是一种在石油开采、环保、化工等领域的将互不相溶的气液两相和液液两相进行分离的装置。所述分流器的本体是具有一个进液口两个出液口的耐压容器,在其内部的腔体内有一个水平设置的分流隔板将腔体分成上下两个空间,上层空间与上出液口相连通,下层空间与下出液口相连通,两层空间都与进液口相连通。本发明的优点在于:结构上的简单与紧凑,工作稳定;分流隔板针对来液的不同浓度、比例调节,以使之达到最佳分离状态。可做为精细分离的前置分离装置使用。

Figure 200510123634

A gas-liquid and liquid-liquid splitter of the present invention relates to a device for separating different fluids, in particular to a gas-liquid two-phase and liquid incompatible with each other in the fields of petroleum exploitation, environmental protection, chemical industry, etc. A device for separating liquid phases. The body of the flow divider is a pressure-resistant container with one liquid inlet and two liquid outlets. There is a horizontally arranged divider in the inner cavity to divide the cavity into two spaces, the upper space and the upper outlet. The liquid ports are connected, the lower space is connected with the lower liquid outlet, and both spaces are connected with the liquid inlet. The present invention has the advantages of simple and compact structure and stable operation; the diversion separator is adjusted according to the different concentrations and ratios of incoming liquids so as to achieve the best separation state. It can be used as a pre-separation device for fine separation.

Figure 200510123634

Description

一种将互不相溶的气液两相或液液两相进行分离的装置 A device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase

技术领域 technical field

本发明涉及一种将不同的流体分离的装置,特别是一种在石油开采、环保、化工等领域的将互不相溶的气液两相或液液两相进行分离的装置。The invention relates to a device for separating different fluids, in particular to a device for separating immiscible gas-liquid two-phases or liquid-liquid two-phases in the fields of petroleum exploitation, environmental protection, chemical industry and the like.

背景技术 Background technique

对于海洋采油平台或海底水下生产系统的油气水分离器,不但要求具有结构简单、体积小、重量轻、分离效率高、处理量大、容易安装维护、安全可靠等特点,而且要求能够适应组成比例变化的多相流介质。现有的分离器很难达到这些要求。For oil-gas-water separators on offshore oil production platforms or subsea production systems, not only are required to have the characteristics of simple structure, small size, light weight, high separation efficiency, large processing capacity, easy installation and maintenance, safety and reliability, but also require the ability to adapt to the composition Multiphase flow media with varying proportions. Existing separators are difficult to meet these requirements.

常规的气液和液液分离,例如专利CN2109238——新疆石油管理局申请的“复合筒体立式油气两相分离器”和专利CN87103897——日本的江岛新见裕申请的“油水分离的方法和设备”,采用重力及离心原理分离多相介质,通常设备体积较大,结构复杂。Conventional gas-liquid and liquid-liquid separation, such as patent CN2109238 - "composite cylinder vertical oil-gas two-phase separator" applied by Xinjiang Petroleum Administration Bureau and patent CN87103897 - "oil-water separation" applied by Japan's Edo Shinmiyu Methods and equipment", using gravity and centrifugal principles to separate multi-phase media, usually the equipment is large in size and complex in structure.

发明内容 Contents of the invention

本发明的目的在于克服现有技术存在的问题,提供一种具有可针对来液的不同浓度、比例调节,以使之达到最佳分离状态分流隔板结构的、将互不相溶的气液两相和液液两相进行分离的装置,该分离器解决了现有的分离器由于体积较大和结构复杂而不能适合生产要求的问题。The purpose of the present invention is to overcome the problems existing in the prior art, to provide a kind of gas-liquid that can be adjusted according to the different concentrations and ratios of the incoming liquid, so as to achieve the best separation state and divider structure, which will not dissolve in each other. The device for separating two-phase and liquid-liquid two-phase, the separator solves the problem that the existing separator cannot meet the production requirements due to its large volume and complex structure.

本发明的目的是这样实现的:The purpose of the present invention is achieved like this:

本发明提供的将互不相溶的气液两相或液液两相进行分离的装置,包括一本体,所述本体是三通管形结构的耐压容器,三通管的左侧管口是进液口,三通管的右侧管口是下出液口,三通管的上管口是上出液口,在其内部的腔体内有一个水平设置的分流隔板,该分流隔板将腔体分成上下两个空间,上层空间与上出液口相连通,下层空间与下出液口相连通,两层空间都与进液口相连通,所述内腔直径和与进液口相连接的来液管的直径相等。The device for separating immiscible gas-liquid two-phases or liquid-liquid two-phases provided by the present invention includes a body, the body is a pressure-resistant container with a three-way tubular structure, and the left nozzle of the three-way pipe is is the liquid inlet, the right nozzle of the three-way pipe is the lower liquid outlet, the upper nozzle of the three-way pipe is the upper liquid outlet, and there is a horizontally arranged divider in the inner cavity. The plate divides the cavity into upper and lower spaces, the upper space communicates with the upper liquid outlet, the lower space communicates with the lower liquid outlet, and both spaces communicate with the liquid inlet. The diameters of the liquid pipes connected to the ports are equal.

在上述的技术方案中,所述的分流隔板的端部与所述进液口的端部相平齐。In the above-mentioned technical solution, the end of the flow divider is flush with the end of the liquid inlet.

在上述的技术方案中,所述本体是三通管形结构,三通管的左侧管口是进液口,三通管的右侧管口是下出液口,三通管的上管口是上出液口。In the above-mentioned technical scheme, the body is a three-way tubular structure, the left nozzle of the three-way pipe is the liquid inlet, the right nozzle of the three-way pipe is the lower liquid outlet, and the upper pipe of the three-way pipe The mouth is the upper liquid outlet.

在上述的技术方案中,所述的分流隔板位于三通管右侧管口一端的上方有将该管口上部封闭的堵头;所述堵头朝向进液口一端的纵向截面为抛物线形。In the above technical solution, the splitter plate is located above one end of the nozzle on the right side of the tee pipe, and there is a plug that closes the upper part of the nozzle; the longitudinal section of the plug facing the end of the liquid inlet is parabolic. .

在上述的技术方案中,所述的本体的每个管口处均设置有连接用法兰。In the above technical solution, each nozzle of the body is provided with a connecting flange.

在上述的技术方案中,所述的本体内腔壁上有一组分别与分流隔板的两个侧边相配合的条形槽。In the above technical solution, there is a set of strip-shaped grooves on the wall of the inner cavity of the main body respectively matched with the two side edges of the flow divider.

在上述的技术方案中,所述的本体内腔壁上有至少两组高度不相同的、并能分别与分流隔板的两个侧边相配合的条形槽。In the above technical solution, there are at least two groups of strip-shaped grooves with different heights on the wall of the inner cavity of the main body, which can respectively cooperate with the two sides of the divider partition.

在上述的技术方案中,所述本体的中轴线至上出液口高度H与分流器内腔半径r之比小于5。In the above technical solution, the ratio of the height H from the central axis of the body to the upper liquid outlet to the radius r of the inner cavity of the flow divider is less than 5.

在上述的技术方案中,所述本体的进液口至水平出液口长度L与分流器内腔半径r之比小于10。In the above technical solution, the ratio of the length L from the liquid inlet to the horizontal liquid outlet of the body to the radius r of the internal cavity of the flow divider is less than 10.

本发明根据在长水平管中的多相流分层流动原理,采用T型设计,结构简单、紧凑。它有一个进液口、两个出液口;一个具用一定体积的分流腔体,可以使包含在液体中的气泡上浮膨胀;一个可逐级调节的隔片,水平分隔上下分流腔体空间,可以在一定比例范围内调节上下两层空间大小,以利于分离不同浓度、比例的气液及液液两相流体。According to the multiphase flow stratified flow principle in the long horizontal pipe, the invention adopts a T-shaped design, and has a simple and compact structure. It has a liquid inlet and two liquid outlets; a split cavity with a certain volume, which can make the air bubbles contained in the liquid rise and expand; a step-by-step adjustable spacer separates the space of the upper and lower split cavity horizontally , the size of the upper and lower layers of space can be adjusted within a certain ratio range to facilitate the separation of gas-liquid and liquid-liquid two-phase fluids with different concentrations and ratios.

本发明提供的将互不相溶的气液两相或液液两相进行分离的装置,具有如下优点:The device for separating the immiscible gas-liquid two-phase or liquid-liquid two-phase provided by the present invention has the following advantages:

1.结构上的简单与紧凑,工作稳定;1. Simple and compact structure, stable work;

2.由于采用分流隔板结构,可以针对来液的不同浓度、比例进行调节,以使之达到最佳分离状态;2. Due to the use of the splitter structure, it can be adjusted according to the different concentrations and ratios of the incoming liquid, so as to achieve the best separation state;

3.本装置也可做为精细分离的前置分离装置使用。3. This device can also be used as a pre-separation device for fine separation.

附图说明 Description of drawings

图1是本发明实施例1的分流器正剖示意图,Fig. 1 is a schematic front sectional view of a flow divider according to Embodiment 1 of the present invention,

图2是图1的横剖结构示意图,Fig. 2 is a cross-sectional structural schematic diagram of Fig. 1,

图3是本发明实施例2的结构示意图,Fig. 3 is a schematic structural view of Embodiment 2 of the present invention,

图4是本发明实施例3的结构示意图。Fig. 4 is a schematic structural diagram of Embodiment 3 of the present invention.

图面说明:10-本体;    11-进液口;       12-上出液口;Drawing description: 10-body; 11-liquid inlet; 12-upper liquid outlet;

13-水平出液口;        14-上腔;         15-下腔;13-horizontal liquid outlet; 14-upper cavity; 15-lower cavity;

16-分流隔板;          16-1-堵头;       17-法兰;16-Split divider; 16-1-plug; 17-flange;

21-水平来液管,        22-T型管立管,    23-T型管下水平管,21-Horizontal incoming liquid pipe, 22-T-type pipe standpipe, 23-T-type pipe lower horizontal pipe,

24-T型管上水平管;     32-上出液管;     33-水平出液管;24-T-shaped pipe upper horizontal pipe; 32-upper outlet pipe; 33-horizontal outlet pipe;

40-双螺旋管;          41-双螺旋管出口; 42-单螺旋管;40-double spiral tube; 41-double spiral tube outlet; 42-single spiral tube;

43-单螺旋管出口;      44-第一储罐;     45-第二储罐。43-single spiral pipe outlet; 44-the first storage tank; 45-the second storage tank.

具体实施方式 Detailed ways

以下通过具体实施实例和附图进一步详细说明本发明的装置:The device of the present invention is further described in detail below through specific implementation examples and accompanying drawings:

实施例1Example 1

参阅图1和图2,制作一气液和液液分流器,其本体10是具有三通管形结构的耐压容器,其耐压容器上设有一个进液口11,三通管的左侧管口是进液口11,三通管的右侧管口是下出液口13,三通管的上管口是上出液口12;在其内部的腔体内有一个水平设置的分流隔板16将腔体分成上下两个空间,上腔14与上出液口12相连通,下腔15与下出液口(或水平出液口)13相连通,两层空间都与进液口相连通。所述的分流隔板的端部与所述进液口的端部相平齐。所述的分流隔板位于三通管右侧管口一端的上方有将该管口上部封闭的堵头16-1,该堵头朝向进液口一端的纵向截面为抛物线形。所述的三通管结构的分离器本体的每个管口处均设置有连接用法兰17。所述的分流器本体内腔壁上有三组高度不相同的并能分别与分流隔板的两个侧边相配合的条形槽。Referring to Fig. 1 and Fig. 2, make a gas-liquid and liquid-liquid splitter, its body 10 is a pressure-resistant container with a three-way tubular structure, and its pressure-resistant container is provided with a liquid inlet 11, the left side of the three-way pipe The nozzle is the liquid inlet 11, the right nozzle of the three-way pipe is the lower liquid outlet 13, and the upper nozzle of the three-way pipe is the upper liquid outlet 12; The plate 16 divides the cavity into upper and lower spaces, the upper cavity 14 communicates with the upper liquid outlet 12, the lower chamber 15 communicates with the lower liquid outlet (or horizontal liquid outlet) 13, and both spaces are connected with the liquid inlet connected. The end of the splitter is flush with the end of the liquid inlet. The splitter is located above one end of the nozzle on the right side of the tee pipe and has a plug 16-1 that closes the upper part of the nozzle. The longitudinal section of the plug facing the end of the liquid inlet is parabolic. Each nozzle of the separator body of the three-way pipe structure is provided with a connecting flange 17 . There are three groups of bar-shaped grooves with different heights on the inner cavity wall of the diverter body, which can respectively cooperate with the two sides of the diverter partition.

分流器本体10的总长与内腔半径之L/r=9,分流腔体具有适当的容积,内腔长与半径之比l/r=5或6,高度与内腔半径之比分H/r=4,分流器内径与水平来液管21(参阅图3)内径相等。The total length of the shunt body 10 and the inner cavity radius L/r=9, the shunt cavity has an appropriate volume, the ratio of the inner cavity length to the radius l/r=5 or 6, the ratio of the height to the inner cavity radius H/r =4, the inner diameter of the shunt is equal to the inner diameter of the horizontal incoming liquid pipe 21 (referring to FIG. 3 ).

实施例2Example 2

参阅图3,本实施例涉及的是实施例1所述的分流器的应用,其结构和工作原理是:Referring to Fig. 3, what this embodiment relates to is the application of the shunt described in embodiment 1, and its structure and working principle are:

1.分流器采用水平安装方式,进液口11与出液口13处于水平位置;1. The shunt is installed horizontally, and the liquid inlet 11 and the liquid outlet 13 are in a horizontal position;

2.气液或液液两相流通过水平来液管21进入分流器本体10,在进入分流器前,由于重力作用,两相流形成具有一定界面的分层流动;2. The gas-liquid or liquid-liquid two-phase flow enters the diverter body 10 through the horizontal incoming liquid pipe 21. Before entering the diverter, due to the action of gravity, the two-phase flow forms a stratified flow with a certain interface;

3.分层流动的两相流,经分流隔板16作用,在其分界面处将两相流中的气液或液液两相分隔开,密度小的气相或液相进入上腔体14,密度大的进入下腔体15;3. The two-phase flow of stratified flow, through the action of the splitter 16, separates the gas-liquid or liquid-liquid two phases in the two-phase flow at its interface, and the gas phase or liquid phase with low density enters the upper chamber 14. The ones with high density enter the lower chamber 15;

4.调节分流隔片16,针对不同来液浓度选择适当的上下分流腔体14、15比例,以使分离效果最佳;4. Adjust the shunt spacer 16, and select the appropriate ratio of the upper and lower shunt chambers 14 and 15 for different incoming liquid concentrations, so as to achieve the best separation effect;

5.气体或两相中密度相对较小的液体从上出液口12,经T型管立管22排出,而另一种经过分离后的液体由分流器水平出液口13,经T型管下水平管23排出;5. The gas or the liquid with relatively low density in two phases is discharged from the upper liquid outlet 12 through the T-shaped pipe standpipe 22, while the other separated liquid is discharged from the horizontal liquid outlet 13 of the splitter through the T-shaped pipe The horizontal pipe 23 under the pipe is discharged;

6.经过组和在一起的分流器和T型管的作用,两种流体达到分离目的。在此实施例中,油水组份为1∶1的混合液经过分流器与T型管处理后,可以在上水平管24出口处得到含水率不高于15%的油,在下水平管23出口处得到含油率不高于15%的水。6. The two fluids achieve the purpose of separation through the combination of the diverter and the T-shaped tube. In this embodiment, after the mixed liquid with an oil-water composition of 1:1 is processed by a splitter and a T-shaped pipe, oil with a water content of not higher than 15% can be obtained at the outlet of the upper horizontal pipe 24, and oil with a water content of not higher than 15% can be obtained at the outlet of the lower horizontal pipe 23. Water with an oil content not higher than 15% can be obtained everywhere.

实施例3Example 3

参阅图4,本实施例涉及的是实施例1所述的分流器的应用,其结构和工作原理是:Referring to Fig. 4, what this embodiment relates to is the application of the shunt described in embodiment 1, and its structure and working principle are:

1.分流器采用水平安装方式,进液口11与出液口13处于水平位置;1. The shunt is installed horizontally, and the liquid inlet 11 and the liquid outlet 13 are in a horizontal position;

2.油水两相流通过水平来流管21进入分流器10,在进入分流器前,由于重力作用,两相流形成具有一定界面的分层流动;2. The oil-water two-phase flow enters the flow divider 10 through the horizontal incoming flow pipe 21. Before entering the flow divider, due to the action of gravity, the two-phase flow forms a layered flow with a certain interface;

3.分层流动的两相流,经分流隔板16作用,在其分界面处将两相流中的气液或液液两相分隔开,密度小的气相或液相进入上腔体14,密度大的进入下腔体15;3. The two-phase flow of stratified flow, through the action of the splitter 16, separates the gas-liquid or liquid-liquid two phases in the two-phase flow at its interface, and the gas phase or liquid phase with low density enters the upper chamber 14. The ones with high density enter the lower chamber 15;

4.调节分流隔片16,针对不同来液浓度选择适当的上下分流腔体14、15比例,以使分离效果最佳;4. Adjust the shunt spacer 16, and select the appropriate ratio of the upper and lower shunt chambers 14 and 15 for different incoming liquid concentrations, so as to achieve the best separation effect;

5.气体或两相中密度相对较小的液体从上出液口12,经分离器上出液管32排出,而另一种经过分离后的液体由分流器水平出液口13,经分流器水平出液管33排出;5. The gas or the liquid with relatively low density in the two phases is discharged from the upper liquid outlet 12 through the upper liquid outlet pipe 32 of the separator, while the other separated liquid is discharged from the horizontal liquid outlet 13 of the splitter through the split flow The horizontal outlet pipe 33 of the device is discharged;

6.由32、33排出的液体再分别进入双、单螺旋管40、42进行更精细的油水分离,可在其出液口41、43处得到含水率较低的油,而在第一储罐44、第二储罐45内得到含油率较低的水;6. The liquid discharged from 32, 33 enters the double and single helical pipes 40, 42 respectively for finer oil-water separation, and the oil with lower water content can be obtained at the liquid outlets 41, 43, while the oil in the first storage Water with lower oil content is obtained in the tank 44 and the second storage tank 45;

7.分流器与至少一个螺旋管可以组合使用,从而达到不同效果的分离目的。在此实施例中,油水组份为1∶1的混合液经过分流器与螺旋管处理后,可以得到油的纯度大于95%,水中含油小于5%。7. The splitter and at least one spiral tube can be used in combination to achieve separation purposes with different effects. In this embodiment, the oil-water mixture with a 1:1 composition is treated by a splitter and a spiral tube to obtain an oil with a purity greater than 95% and an oil content of less than 5% in the water.

最后所应说明的是:以上实施例仅用以说明而非限制本发明的技术方案,尽管参照上述实施例对本发明进行了详细说明,本领域的普通技术人员应当理解:对本发明的结构进行修改或者等同替换,而不脱离本发明的精神和范围的任何修改或局部替换,其均应涵盖在本发明的权利要求范围当中。Finally, it should be noted that: the above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the structure of the present invention is modified Or an equivalent replacement, any modification or partial replacement without departing from the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

Claims (8)

1.一种将互不相溶的气液两相或液液两相进行分离的装置,包括一本体,其特征在于:所述本体是一三通管形结构的耐压容器,三通管的左侧管口是进液口,三通管的右侧管口是下出液口,三通管的上管口是上出液口,在其内部的腔体内有一个水平设置的分流隔板将腔体分成上下两个空间,上层空间与所述上出液口相连通,下层空间与所述下出液口相连通,两层空间都与所述进液口相连通,所述内腔直径和与进液口相连接的来液管的直径相等。1. A device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase, comprising a body, characterized in that: the body is a pressure-resistant container of a three-way tubular structure, and the three-way pipe The left nozzle of the tee is the liquid inlet, the right nozzle of the three-way pipe is the lower liquid outlet, the upper nozzle of the three-way pipe is the upper liquid outlet, and there is a horizontally arranged divider in the inner cavity. The plate divides the cavity into upper and lower spaces, the upper space communicates with the upper liquid outlet, the lower space communicates with the lower liquid outlet, both spaces communicate with the liquid inlet, and the inner space communicates with the upper liquid outlet. The diameter of the cavity is equal to the diameter of the incoming liquid pipe connected with the liquid inlet. 2.如权利要求1所述的将互不相溶的气液两相或液液两相进行分离的装置,其特征在于:所述的分流隔板的端部与所述进液口的端部相平齐。2. The device for separating the immiscible gas-liquid two-phase or liquid-liquid two-phase as claimed in claim 1, characterized in that: the end of the divider and the end of the liquid inlet The parts are even. 3.如权利要求1所述的将互不相溶的气液两相或液液两相进行分离的装置,其特征在于:所述的分流隔板位于三通管右侧管口一端的上方有将该管口上部封闭的堵头。3. The device for separating the immiscible gas-liquid two-phase or liquid-liquid two-phase as claimed in claim 1, characterized in that: the splitter is located above the end of the nozzle on the right side of the three-way pipe There is a plug that closes the upper part of the nozzle. 4.如权利要求3所述的将互不相溶的气液两相或液液两相进行分离的装置,其特征在于:所述堵头朝向进液口一端的纵向截面为抛物线形。4. The device for separating immiscible gas-liquid two-phases or liquid-liquid two-phases according to claim 3, characterized in that: the longitudinal section of the end of the plug facing the liquid inlet is parabolic. 5.如权利要求1所述的将互不相溶的气液两相或液液两相进行分离的装置,其特征在于:所述的本体的每个管口处均设置有连接用法兰。5. The device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase as claimed in claim 1, characterized in that: each nozzle of the body is provided with a connecting flange. 6.如权利要求1或2所述的将互不相溶的气液两相或液液两相进行分离的装置,其特征在于:所述的本体内腔壁上有一组分别与分流隔板的两个侧边相配合的条形槽。6. The device for separating the immiscible gas-liquid two-phase or liquid-liquid two-phase as claimed in claim 1 or 2, characterized in that: there is a group of divider plates on the inner cavity wall of the body The two sides of the matching bar groove. 7.如权利要求6所述的将互不相溶的气液两相或液液两相进行分离的装置,其特征在于:所述的本体内腔壁上有至少两组高度不相同的、并能分别与分流隔板的两个侧边相配合的条形槽。7. The device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase as claimed in claim 6, characterized in that: there are at least two groups of different heights on the inner cavity wall of the body, And can respectively cooperate with the two sides of the splitter divider. 8.如权利要求1所述的将互不相溶的气液两相或液液两相进行分离的装置,其特征在于:所述本体的进液口至下出液口之间长度L与分流器内腔的半径r之比小于10,本体中轴线至上出液口处的高度H与内腔半径r之比小于5。8. The device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase as claimed in claim 1, characterized in that: the length L between the liquid inlet of the body and the lower liquid outlet is equal to or equal to The ratio of the radius r of the inner cavity of the flow divider is less than 10, and the ratio of the height H from the central axis of the body to the upper liquid outlet to the radius r of the inner cavity is less than 5.
CNB2005101236347A 2005-11-18 2005-11-18 A device for separating immiscible gas-liquid two-phase or liquid-liquid two-phase Expired - Fee Related CN100395002C (en)

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CN102423551A (en) * 2011-08-15 2012-04-25 北京百恒达石油技术有限公司 High-efficiency gas-liquid separator
CN111659190A (en) * 2020-07-01 2020-09-15 温州如剑环保科技有限公司 Vapor-liquid double-state sulfide treatment process without harmful byproducts
CN112520869B (en) * 2020-11-12 2021-08-10 兰州理工大学 Factory sewage treatment device
CN113482593B (en) * 2021-07-06 2022-12-13 河南亚盛电气有限责任公司 Accurate metering device for oil field well head liquid production amount and oil production amount

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