CN117778072A - Natural gas liquid separating tank and liquid-passing gas-blocking ring - Google Patents
Natural gas liquid separating tank and liquid-passing gas-blocking ring Download PDFInfo
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 239000007788 liquid Substances 0.000 title claims abstract description 122
- 239000003345 natural gas Substances 0.000 title claims abstract description 81
- 230000000903 blocking effect Effects 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims description 43
- 238000000926 separation method Methods 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 6
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- 239000012528 membrane Substances 0.000 claims description 5
- 238000004581 coalescence Methods 0.000 claims description 4
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- 239000005871 repellent Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
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- 150000001412 amines Chemical class 0.000 description 7
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- 238000004519 manufacturing process Methods 0.000 description 6
- -1 alcohol amine Chemical class 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 208000005156 Dehydration Diseases 0.000 description 3
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
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- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
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- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
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- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
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Abstract
The invention relates to a natural gas liquid separating tank and a liquid passing and blocking ring, and the liquid passing and blocking ring for the natural gas liquid separating tank comprises a ring-shaped ring body of a Kong Zuqi belt, wherein the ring-shaped ring body of the Kong Zu belt is used for blocking an annular gap between the inner wall of a shell of the natural gas liquid separating tank and a bearing table for installing a coalescing filter element, the ring body of the Kong Zu belt is provided with vertically extending through holes for liquid to flow downwards, and the through holes are distributed along the circumference. The liquid-passing blocking ring provided by the invention can be additionally arranged in the natural gas liquid separating tank, so that the liquid-passing blocking ring is blocked on an annular gap between the bearing table and the liquid separating tank shell, and can limit the formation of annular vortex after the airflow reaches a steady-state stage, thereby playing a role in stabilizing the flow field in the tank body.
Description
Technical Field
The invention relates to the technical field of gas-liquid separation of natural gas, in particular to a natural gas separating tank and a liquid-passing blocking ring for a natural gas tank.
Background
Petrochemical industry production enterprises need to carry out various technological processes in daily production processes, and take high-sulfur natural gas in a natural gas purification plant of a common phosgene field as an example, the natural gas needs to be subjected to desulfurization and dehydration treatment. The wet desulfurizing process is mainly alcohol amine process, and has the main principle that hydrogen sulfide and carbon dioxide as acid gases are dissolved in water to form acidity, the alcohol amine solution is alkaline, the two are subjected to reversible acid-base neutralization reaction, the reaction direction is mainly controlled by temperature and pressure, wherein the most commonly used desulfurizing agents are MDEA, MEA and DEA, when the treatment capacity is large, more MDEA is adopted internationally, and the domestic chemical plants adopt the desulfurizing and decarbonizing processes. The working environment of the absorption tower is high pressure and low temperature, because when the temperature is about 40 ℃, the pressure is about 4MPa, the chemical reaction is forward, the reaction of alcohol amine and acid gas is facilitated, the amine liquid absorbing the acid gas is generally called rich amine, and the amine liquid not absorbing the acid gas is generally called lean amine. The rich amine comes out from the bottom of the absorption tower, is decompressed through a flash tank, exchanges heat through a lean-rich amine heat exchanger, enters the resolving tower, the working environment of the resolving tower is high temperature and low pressure, the general working pressure is 60kpa, the temperature is about 120 ℃, the rich amine enters the resolving tower, and the acid gas is resolved out from the top of the tower under the environment of high temperature and low pressure, and is cooled and vented through a cooler or specially treated. The alcohol amine can be recycled, and hydrogen sulfide and carbon dioxide in the natural gas can be continuously removed from cycle to cycle. Because alcohol amine processes remove acid gases, which can increase the water content of natural gas, dehydration is typically performed after the removal of acid gases. At present, the glycol method is mainly adopted for dehydration, and after the process is finished, the glycol content in the natural gas is increased to influence the quality of the natural gas, and the effect of the liquid separating tank is to remove alcohols and MDEA in the natural gas, so that the liquid separating tank becomes an indispensable device in a natural gas purifying system.
FIG. 1 is a schematic diagram of a conventional natural gas separation tank. The inside of the shell 1 is provided with a bearing table 4, the bearing table 4 is provided with a coalescing filter element 3, gas containing liquid enters the separation equipment through a gas inlet pipeline 5 of a natural gas liquid separating tank, then the gas enters the filter element through pores of a filter material on the inner side surface of the filter element 3 under the action of pressure difference, liquid particles in the gas are trapped on the inner surface of the filter element 3, the gas flows out from the outer side of the filter element 3 in a liquid form under the action of coalescence, the purified gas is discharged from the liquid separating tank through an exhaust pipeline 7, and the liquid formed by coalescence can be discharged through a blow-down valve 6.
In the prior art, the main separation element of the vertical liquid separation tank is a coalescing filter element when gas-liquid separation is carried out, and the coalescing filter element can be used for converging small liquid drops mixed in gas into large liquid drops to be discharged out of the filter element, so that the effect of purifying the gas is achieved. The liquid separating tank is divided into an upper cavity and a lower cavity, the upper cavity and the lower cavity are communicated, the liquid which is coalesced and filtered by the coalescent filter element can be guided into the lower part of the cavity for storage and then discharged regularly, but at the moment, the liquid which enters the lower cavity in the liquid discharging process reenters the downstream of the pipeline under the action of vortex of purified natural gas due to the upper cavity and the lower cavity are communicated, and the liquid which is partially recovered is secondarily entrained by the ascending gas in the recovery process to enter the downstream pipeline, so that the separation effect is unsatisfactory.
Analysis shows that the purpose of communicating the upper cavity and the lower cavity of the liquid separating tank is to enable the liquid coalesced by the filter element to flow into the lower cavity, so that the space of the annular gap between the bearing table 4 and the shell 1 provides a channel for liquid circulation; however, the existing annular gap also causes secondary bypass flow, so that trapped liquid escapes into a downstream pipeline under the action of air flow when passing through the annular gap, and the filtration efficiency is reduced, so that the original design has defects.
Fig. 2a to 2d and fig. 3a to 3d are results obtained by simulation of the existing liquid separation tank, and are velocity cloud diagrams of YOZ and XOY sections of the existing natural gas liquid separation tank at four time points of 15s, 30s, 45s and 60s respectively from left to right. From the velocity cloud of the two sections, it can be seen that there is a small amount of natural gas flowing into the lower half of the tank from the gap between the mixing chamber and the tank, forming a velocity vortex, the velocity of which is about 0.05m/s compared to the inlet gas velocity of 0.2m/s, and the formation of the vortex causing the liquid partially recovered to be re-entrained into the downstream pipeline by the rising gas during recovery.
To sum up: the upper cavity and the lower cavity in the natural gas liquid separating tank in the prior art are communicated through an annular gap, so that gas flows in the lower cavity, the gas flowing in the lower cavity can be mixed in the gas flow again in the process of entering the lower cavity through liquid drops, the gas flows into the upper cavity through the annular gap, then flows into the downstream of a pipeline from the gas outlet of the natural gas liquid separating tank, and therefore, the liquid discharged after being filtered by the filter element can not overcome vortex disturbance to generate secondary entrainment only under the action of gravity due to the existence of the annular gap, which is a main reason for the reduction of the working efficiency of the natural gas liquid separating tank.
Disclosure of Invention
The invention aims to provide a liquid-passing and gas-blocking ring for a natural gas liquid separating tank, so as to solve the problem that liquid discharged after being filtered by a filter element of the natural gas liquid separating tank is brought into the downstream of a pipeline by gas. The invention also aims to provide a natural gas liquid separating tank using the liquid passing and blocking ring.
The invention discloses a liquid-passing and gas-blocking ring for a natural gas liquid separating tank, which comprises a ring-shaped ring body with a Kong Zuqi ring body, wherein the ring-shaped ring body with a Kong Zu ring body is used for blocking an annular gap between the inner wall of a shell of the natural gas liquid separating tank and a bearing table provided with a coalescing filter element, through holes which extend up and down and are used for enabling liquid to flow downwards are arranged on the ring body with a Kong Zu ring body, and the through holes are distributed along the circumference.
The liquid-passing blocking ring provided by the invention can be additionally arranged in the natural gas liquid separating tank, so that the liquid-passing blocking ring is blocked on an annular gap between the bearing table and the liquid separating tank shell, and can limit the formation of annular vortex after the airflow reaches a steady-state stage, thereby playing a role in stabilizing the flow field in the tank body.
Further, the through hole is a conical hole with a large upper part and a small lower part. The design of the through holes on the liquid-passing blocking ring is designed to be wide at the upper part and narrow at the lower part, so that the liquid flow can be quickened, and the accumulated liquid is prevented from blocking the through holes.
Further, the wall of the through hole is provided with an oil-repellent material layer and a lyophile material layer which are distributed up and down. This can further facilitate the flow of the liquid to prevent the accumulated liquid from clogging the through hole.
Further, the surface of the liquid-passing blocking ring is provided with an oleophobic and hydrophobic membrane structure for accelerating the flow of liquid. Therefore, the flow of liquid can be quickened, and the accumulation of the liquid in the upper cavity due to the reduction of the flow area is avoided.
Further, the liquid-passing blocking ring is divided into a plurality of sections of fan ring-shaped fan ring structures, and the radial dimension of each section of fan ring structure can be adjusted by connecting the fan ring structures through connecting fasteners. The liquid-passing air-blocking ring formed by the multi-section fan ring structure is easy to maintain and disassemble, can be replaced and maintained in parts, does not need to be replaced completely when damaged parts appear, can reduce the use cost, and has higher economical efficiency. The compression ring body of the belt Kong Zu is connected by the connecting fastener, and the tightness of the liquid-passing blocking ring can be adjusted in a certain range, so that the requirement on manufacturing precision is not high, the connecting fastener is convenient to install and replace, and the manufacturing cost is reduced.
Further, the fan ring structure comprises a liquid blocking fan ring body with holes, wherein a tightening fan ring which is used for being tightly matched with the inner wall of the shell of the natural gas liquid separating tank is arranged on the periphery of the liquid blocking fan ring body with holes, and the outer peripheral surface of the tightening fan ring extends along the axial direction to enlarge a matching surface which is tightly matched with the inner wall of the shell of the natural gas liquid separating tank.
Further, the two ends of the liquid blocking fan ring body with holes and the tightening fan ring are provided with reinforcing parts, each reinforcing part comprises a vertical plate connected between the liquid blocking fan ring body with holes and the tightening fan ring and a flat plate connected between the vertical plate and the tightening fan ring, the vertical plate extends along the axial direction, the flat plate extends along the radial direction, and the vertical plate is used for being matched with the connecting fastener.
Further, the calculation formula of the number n of the through holes is as follows: n=kpi Df (c); d is the diameter of the cavity, and the unit is m; the value range of k is 0-3; the calculation formula of f (c) is as follows:
further, the calculation formula of the area s of the through hole is as follows:Q total (S) For the total gas flow passing through the natural gas separating tank, the unit is m 3 /h；v Hole(s) For the flow rate of each through hole, v Hole(s) The value of (2) is less than 0.05m/s; x is the ratio of the total flow of the medium entering the through hole to the total gas flow passing through the natural gas liquid separating tank, and the value range of x is 0.00001-0.0001%.
The invention relates to a natural gas liquid separating tank, which comprises a shell, wherein a bearing table is arranged in the shell, a coalescing filter element is arranged on the bearing table, an annular gap is arranged between the inner wall of the shell and the bearing table for installing the coalescing filter element, and the liquid passing blocking ring for the natural gas liquid separating tank is arranged in or on the annular gap.
According to the natural gas liquid separating tank provided by the invention, the liquid-passing blocking ring is additionally arranged between the bearing table and the liquid separating tank shell, the liquid-passing blocking ring blocks the annular gap between the bearing table and the liquid separating tank shell, and after the air flow reaches a steady-state stage, the liquid-passing blocking ring can limit the formation of annular vortex, so that the effect of stabilizing the flow field in the tank body is achieved.
Drawings
FIG. 1 is a schematic diagram of a conventional natural gas knock-out tank;
FIGS. 2a to 2d are velocity cloud pictures of the XOY section of the prior natural gas liquid separation tank at four time points of 15s, 30s, 45s and 60s in sequence;
FIGS. 3a to 3d are velocity cloud pictures of YOZ sections at four time points of 15s, 30s, 45s and 60s in sequence for a conventional natural gas liquid separation tank;
FIG. 4 is a schematic diagram of an embodiment of a natural gas liquids tank of the present invention;
FIG. 5 is a schematic view of the liquid-blocking ring of FIG. 4;
FIG. 6 is a schematic perspective view of the liquid-blocking ring of FIG. 4 (without connecting fasteners);
FIG. 7 is a schematic view of the cross-sectional shape of the through-hole of the liquid-blocking ring of FIG. 4 and a surface material layer;
FIGS. 8 a-8 d are velocity cloud photographs of XOY cross-sections at four time points, 15s, 30s, 45s and 60s, of an embodiment of a natural gas knock-out tank of the present invention in sequence;
FIGS. 9 a-9 d are velocity cloud photographs of YOZ sections at four time points of 15s, 30s, 45s and 60s for an embodiment of a natural gas knock out tank according to the invention;
FIG. 10 is a graph of downstream droplet size distribution variation for an embodiment of a prior art natural gas knock-out tank and a natural gas knock-out tank of the present invention;
in the figure:
1. a housing; 2. a manhole; 3. coalescing the filter element; 4. a liquid-blocking ring is introduced; 5. a carrying platform; 6. an air inlet; 7. a blow-down valve; 8. an air outlet; 401. connecting a fastener; 402. a band Kong Zu air ring; 403. a reinforcement; 404. a tightening ring; 405. a through hole; 406. an oil-repellent material layer; 407. a layer of lyophile material.
Detailed Description
An embodiment of the natural gas separating tank of the present invention is provided with a liquid-passing and gas-blocking ring, as shown in fig. 4-7, and includes a hollow housing 1, an extending direction defining a central axis extending up and down of the natural gas separating tank is an axial direction, a direction perpendicular to the axial direction is a radial direction, a bearing table 5 is provided in the housing 1, a coalescing filter element 3 is provided on the bearing table 5, an outer diameter dimension of the bearing table 5 is smaller than an inner diameter dimension of the housing 1, a liquid-passing and gas-blocking ring 4 is provided in an annular gap between an outer wall of the bearing table 5 and an inner wall of the housing 1, the liquid-passing and gas-blocking ring 4 is an annular structure surrounding the central axis, including a ring body Kong Zu, a through hole 405 extending along the axial direction is provided on the ring body Kong Zu, and an oleophobic and hydrophobic membrane structure capable of accelerating liquid flow is provided on a surface of the liquid-passing and gas-blocking ring 4, specifically, in this embodiment, an oleophobic and hydrophobic nanofiber membrane with a thickness of 2mm is attached to a surface of the ring Kong Zu by a thermal fusion method, so as to achieve the purpose of preventing liquid from accumulating on the surface of the liquid on the liquid-passing and gas-blocking ring.
The cross-section (radial cross-section) of the through-hole 405 in this embodiment is circular in shape, and may be square or irregular polygonal in other embodiments. The through hole 405 is a tapered hole with a large upper part and a small lower part, the longitudinal section (axial section) is as shown in fig. 8, the cross section of the hole is trapezoidal, the upper part is wide and the lower part is narrow, the tapered hole is designed to reduce the gas flow area and accelerate the flow of liquid, namely, the tapered hole can enlarge the volume of the hole under the condition that the bottom flow area is the same, more liquid is contained in the hole, the liquid accumulated on the upper part can generate larger pressure on the liquid at the bottom of the hole due to the reduction of the flow cross section, so that the flow speed of the liquid at the bottom is accelerated under the action of the gravity of the liquid at the upper part, the phenomenon of liquid blockage is effectively avoided, meanwhile, the wall of the upper part of the hole is provided with an oil repellent material layer 406, the wall of the lower part of the hole is provided with a lyophile material layer 407, thus the liquid blockage can be effectively prevented, and the angle alpha between the wall surface of the tapered hole and the vertical direction (namely the axial direction) is better in the range of 30 degrees to 60 degrees.
The outer periphery of the gas ring body 402 of the belt Kong Zu is provided with a tightening ring 404 which is used for being tightly fitted with the inner wall of the shell of the natural gas liquid separating tank, and the outer peripheral surface of the tightening ring 404 extends along the axial direction to enlarge the fitting surface which is tightly fitted with the inner wall of the shell of the natural gas liquid separating tank.
In this embodiment, the through-liquid blocking ring 4 is configured to have a structure with adjustable circumferential tightness (i.e., the radial dimension can be adjusted, and the size can be matched with the housing), and can be in tight fit with the inner wall of the housing of the natural gas separating tank, the entire through-liquid blocking ring 4 is divided into a multi-segment fan ring structure, specifically three segments, the fan ring structures of each segment are connected by a connecting fastener 401, the connecting fastener 401 is specifically a bolt, correspondingly, the band Kong Zu gas ring 402 and the tightening ring 404 in this embodiment are also divided into three segments, each segment of fan ring structure includes a perforated liquid blocking fan ring body and a tightening fan ring, the two ends of the perforated liquid blocking fan ring body and the tightening fan ring are provided with a reinforcement 403, the reinforcement 403 includes a vertical plate connected between the perforated liquid blocking fan ring body and the tightening fan ring, and a flat plate connected between the vertical plate and the tightening fan ring, the vertical plate extends along the axial direction, and the flat plate extends along the radial direction, and the vertical plate is used for being matched with the connecting fastener 401, specifically the vertical plate is provided with a bolt hole for threading. The material of the air ring 402 of the strap Kong Zu in this embodiment is rubber, and in other embodiments, soft materials such as slush molding may be substituted.
The area and number of the through holes 405 formed on the surface of the gas ring body 402 of the belt Kong Zu are determined by the flow rate of the gas in the gas separation tank and the concentration of the liquid drops contained in the gas, and the larger the flow rate is, the larger the vortex flow velocity in the lower cavity is, so that the larger the flow rate is, the area of a single hole (the "hole" refers to the through hole 405, and the same applies below) should be as small as possible, so as to achieve the purpose of preventing the gas flow in the upper cavity from entering the lower cavity. When the content of liquid drops in the gas is higher, the liquid which is discharged through the coalescence of the filter element correspondingly can be more, so that the higher the content of liquid drops in the gas is, the more holes are needed, and enough channels are provided for accumulated liquid to flow into the lower cavity. The number of holes (n) is determined according to the following formula:
n＝kπDf(c) (1.1)
wherein D is the diameter of the cavity and m; f (c) is a function related to the mass concentration of droplets in the upstream gas stream, as follows:
k is a correction and adjustment coefficient, optionally 0 to 3, and generally preferably 0.5. The calculated n value is rounded down. For example, when d=1m, the upstream concentration is 150mg/m 3 When n=0.5×3.14×1×2=3.14, the downward rounding is 3 wells.
The area(s) of the holes is determined in the following manner. Record Q Total (S) For the total gas flow through the natural gas separation tank, m 3 And/h. The ratio of the total flow of the medium entering the through holes to the total gas flow passing through the natural gas separation tank is defined as x, and the range should be controlled to be 0.00001-0.0001%, preferably 0.00005%. The calculation formula for the hole area s is:
in the formula (1.3), v Hole(s) The apparent gas velocity of the cartridge (0.05 m/s) cannot be exceeded for the flow rate per orifice, and is generally preferably 0.04m/s. Thus, for example: v Hole(s) 0.00005% of x is 0.04m/s, n is 3, Q Total (S) Is 17 (17)0000m 3 At/h (gas treatment flow rate commonly used for liquid separation tanks), s=0.00005×0.01×170000/3/0.04/3600m 2 ＝0.0197m 2 ＝1.97cm 2 。
Preferably, formula (1.3) can be reduced to formula (1.4):
in order to verify the effect of the embodiment of the natural gas separation tank, a CFD simulation test is established as follows: by adopting a realizable k-epsilon model and simulating a standard wall function, the condition that the vortex exists in the cavity when the existing natural gas liquid separating tank reaches a stable state can be seen from the figures 2a to 2d and the figures 3a to 3d, and the speed is about 0.05m/s. In the embodiment of the natural gas separating tank, the effect of adding the liquid-passing blocking ring is shown in fig. 8a to 8d and fig. 9a to 9d, so that the speed vortex of the lower cavity is basically eliminated after reaching a steady state, the flow speed of the air flow is basically 0m/s to 0.01m/s, the flow speed of the speed vortex of the lower cavity is effectively reduced, the speed vortex is basically eliminated, and the corresponding secondary entrainment phenomenon can be obviously weakened.
As shown in FIG. 10, according to the embodiment of the natural gas separation tank provided with the liquid-blocking ring, compared with the natural gas separation tank in the prior art, through on-site verification, the downstream particulate matters of the natural gas separation tank are obviously reduced, and the particulate matter concentration is 20mg/m 3 Reduced to 0.2mg/m 3 And the particle count concentration also decreased significantly, wherein the particle size at 0.24 μm was reduced by 97%, and substantially no large particles above 1 μm were present. The embodiment of the natural gas liquid separating tank can effectively reduce the phenomenon of secondary entrainment of liquid drops caused by vortex after the liquid passing and blocking ring is additionally arranged.
Therefore, the novel natural gas separating tank with the liquid-introducing gas-blocking ring has the following beneficial effects: according to the natural gas liquid separating tank with the liquid-blocking ring, the liquid-blocking ring is additionally arranged between the bearing table and the liquid separating tank shell, the formation of annular vortex is limited after the airflow reaches a steady state stage, the effect of stabilizing the flow field in the tank body is achieved, and the oleophobic and hydrophobic nanofiber membrane on the surface of the gas-blocking ring body with the holes can accelerate the flow of liquid and cannot cause accumulation of the liquid in the upper cavity due to reduction of the flow area. The design of the through hole of the liquid-passing and gas-blocking ring is designed to be wide at the upper part and narrow at the lower part, meanwhile, the design of the hydrophilic liquid at the upper part of the inner wall of the hole can accelerate the liquid flow, prevent the accumulated liquid from blocking the through hole, and the number and the area of the holes can be calculated by a formula (1.1) and a formula (1.3).
Further, the ring liquid-passing and gas-blocking ring is formed by splicing three-part fan ring structures, and because the manhole is relatively narrow, the liquid-passing and gas-blocking ring formed by the three-part fan ring structures is easy to maintain and disassemble, can be replaced and maintained in parts, does not need to be replaced completely when damaged parts occur, can reduce the use cost, and is high in economical efficiency. The compression ring body of the belt Kong Zu is connected by the connecting fastener, and the tightness of the liquid-passing blocking ring can be adjusted in a certain range, so that the requirement on manufacturing precision is not high, the connecting fastener is convenient to install and replace, and the manufacturing cost is reduced.
The embodiment of the liquid-passing and gas-blocking ring for the natural gas liquid separating tank has the same structure as that of the liquid-passing and gas-blocking ring in the embodiment of the natural gas liquid separating tank.
In addition, in other embodiments of the present invention, the liquid-passing and gas-blocking ring may be a whole ring instead of a segmented structure; in addition, the through hole in the liquid-passing and gas-blocking ring can be a hole with a square or irregular polygonal section, can be a straight cylindrical hole, and belongs to the embodiment for realizing the technical scheme of the invention.
Claims (10)
1. The utility model provides a lead to liquid and hinder gaseous ring for natural gas liquid separation jar, its characterized in that includes taking Kong Zu gaseous ring body (402) in annular, takes Kong Zu gaseous ring body (402) to be used for shutoff natural gas liquid separation jar's casing (1) inner wall and the annular clearance between plummer (5) of installation coalescence filter core (3), is equipped with through-hole (405) that are used for liquid downwardly flowing that extend from top to bottom on taking Kong Zu gaseous ring body (402), and through-hole (405) are distributed along the circumference.
2. The liquid-passing and gas-blocking ring for a natural gas separation tank according to claim 1, wherein the through hole (405) is a tapered hole with a large upper part and a small lower part.
3. The liquid-passing and gas-blocking ring for the natural gas separation tank according to claim 2, wherein the hole wall of the through hole (405) is provided with an oil-repellent material layer and a liquid-philic material layer which are distributed up and down.
4. The liquid-passing and gas-blocking ring for the natural gas separation tank according to claim 1, wherein the surface of the liquid-passing and gas-blocking ring (4) is provided with an oleophobic and hydrophobic membrane structure for accelerating the flow of liquid.
5. The liquid-passing and gas-blocking ring for a natural gas separation tank according to claim 1, wherein the liquid-passing and gas-blocking ring (4) is divided into a plurality of sections of ring-shaped ring-fan structures, and the ring-fan structures are connected by connecting fasteners (401) to adjust the radial dimension.
6. The liquid-passing and air-blocking ring for the natural gas separation tank according to claim 5, wherein the fan ring structure comprises a perforated liquid-blocking fan ring body, a tightening fan ring for being tightly fitted with the inner wall of the shell (1) of the natural gas separation tank is arranged on the periphery of the perforated liquid-blocking fan ring body, and the outer circumferential surface of the tightening fan ring extends along the axial direction to enlarge a fitting surface for being tightly fitted with the inner wall of the shell (1) of the natural gas separation tank.
7. The liquid-passing and gas-blocking ring for a natural gas separation tank according to claim 6, wherein the two ends of the liquid-blocking ring body with holes and the tightening ring are provided with reinforcing members (403), the reinforcing members (403) comprise a vertical plate connected between the liquid-blocking ring body with holes and the tightening ring, and a flat plate connected between the vertical plate and the tightening ring, the vertical plate extends along the axial direction, the flat plate extends along the radial direction, and the vertical plate is used for being matched with a connecting fastener (401).
8. The liquid-passing choke ring for a natural gas liquids tank according to any one of claims 1-7, characterized in that the calculation formula of the number n of through holes (405) is: n=kpi Df (c); d is the diameter of the cavity, and the unit is m; the value range of k is 0-3; the calculation formula of f (c) is as follows:
9. the liquid-passing and gas-blocking ring for a natural gas separation tank according to claim 8, wherein the area s of the through hole (405) is calculated by the formula:Q total (S) For the total gas flow passing through the natural gas separating tank, the unit is m 3 /h；v Hole(s) For the flow rate of each through hole (405), v Hole(s) The value of (2) is less than 0.05m/s; x is the ratio of the total flow of the medium entering the through hole (405) to the total gas flow passing through the natural gas liquid separating tank, and the value range of x is 0.00001-0.0001%.
10. A natural gas liquid separating tank, which is characterized by comprising a shell (1), wherein a bearing table (5) is arranged in the shell (1), a coalescing filter element (3) is arranged on the bearing table (5), an annular gap is arranged between the inner wall of the shell (1) and the bearing table (5) for installing the coalescing filter element (3), and the liquid blocking ring for the natural gas liquid separating tank according to any one of claims 1-9 is arranged in or on the annular gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211185022.0A CN117778072A (en) | 2022-09-27 | 2022-09-27 | Natural gas liquid separating tank and liquid-passing gas-blocking ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211185022.0A CN117778072A (en) | 2022-09-27 | 2022-09-27 | Natural gas liquid separating tank and liquid-passing gas-blocking ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117778072A true CN117778072A (en) | 2024-03-29 |
Family
ID=90378683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211185022.0A Pending CN117778072A (en) | 2022-09-27 | 2022-09-27 | Natural gas liquid separating tank and liquid-passing gas-blocking ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117778072A (en) |
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2022
- 2022-09-27 CN CN202211185022.0A patent/CN117778072A/en active Pending
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