CN103084285B - Gas-liquid separation device for natural gas and gas-liquid separation method therefor - Google Patents
Gas-liquid separation device for natural gas and gas-liquid separation method therefor Download PDFInfo
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- CN103084285B CN103084285B CN201110343457.9A CN201110343457A CN103084285B CN 103084285 B CN103084285 B CN 103084285B CN 201110343457 A CN201110343457 A CN 201110343457A CN 103084285 B CN103084285 B CN 103084285B
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Abstract
The invention belongs to the field of gas-liquid separation and relates to a gas-liquid separation device for natural gas and a gas-liquid separation method therefor. The gas-liquid separation method adopts a gas-liquid hydrocyclone separation device and a gravity gas-liquid separation device to realize two-stage separation of explored natural gas, and comprises the following steps of 1, introducing the natural gas into the gas-liquid hydrocyclone separation device from an inlet of the gas-liquid hydrocyclone separation device, carrying out primary separation, wherein in the primary separation, by a centrifugal force and a buoyancy force produced by vortex produced by the gas-liquid hydrocyclone separation device, gas and liquid in the natural gas are separated at a centrifugal acceleration higher than a gravity acceleration, 2, downward discharging the liquid from an outlet, upward feeding the gas into the gravity gas-liquid separation device by a pipe at a gas outlet, and carrying out secondary separation, and 3, feeding the separated gas into a conveying pipe and discharging the separated liquid by a liquid discharge pipe. The gas-liquid separation device and the method have high separation efficiency. The gas-liquid separation device has a small volume and can be skid-mounted and moved.
Description
Technical field
The present invention relates to gas-liquid separation field, is a kind of gas-liquid separation device and method of natural gas specifically.
Background technology
When natural gas is plucked out of from underground, a small amount of water and condensate can be carried, before entering natural-gas transfer pipeline, need to be pressurized to certain pressure.Current existing method arranges booster pump on gas delivering pipe, and before natural gas enters booster pump, entering separator needs Jiang Shui and oil to separate, in order to avoid affect the work of booster pump.Existing natural-gas separator is horizontal vessel, and rely on Gravity Separation, volume is very huge, and efficiency is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of gas-liquid separation device and method of natural gas, and its separative efficiency is high; And volume is little, can skid, mobile.
Technical scheme of the present invention is: a kind of gas-liquid separating method of natural gas, it is characterized in that: it adopts gas-liquid cyclonic separation to carry out two-stage with gravity gas-liquid separator to the natural gas of extraction and is separated, natural gas is first introduced from the entrance of gas-liquid cyclone separator and carries out first order separation, the vortex formed through gas-liquid cyclone separator produces centrifugal force and buoyancy, its centrifugal acceleration force of gravity acceleration is high, the gas of natural gas and fluid separation applications are opened, liquid is discharged by liquid outlet downwards; Gas then upwards flows into gravity gas-liquid separator by the pipeline of gas vent and carries out second time separation, and the gas after separation enters transfer pipeline, and liquid is discharged from discharging tube.
A kind of gas-liquid separation device of natural gas, it is characterized in that: it comprises a cylindrical gas-liquid cyclone separator and a gravity horizontal type gas and liquid separator, the entrance of cylindrical gas-liquid cyclone separator is communicated with natural gas input pipe, the liquid outlet of cylindrical gas-liquid cyclone separator bottom is communicated with discharging tube by valve, the gas vent on cylindrical gas-liquid cyclone separator top and horizontal type gas and liquid separator UNICOM, the delivery port of horizontal type gas and liquid separator bottom is also communicated with discharging tube.
Described cylindrical gas-liquid cyclonic separation is equipped with the first liquid level sensor, and horizontal type gas and liquid separator is equipped with the second liquid level sensor.
The gas feed of described horizontal type gas and liquid separator and gas outlet are provided with net grid device and spray trap to improve separating effect.
The entrance of described cylindrical gas-liquid cyclone separator is inclination tangential inlet, and the tangential angle that tilts is 65 °-75 °.
The angle of described inclination tangential inlet is 68 °.
The gas-liquid separating method of natural gas, it comprises following steps:
Step 1] natural gas is entered in cylindrical gas-liquid cyclone separator by the tangential inlet that tilts;
Step 2] liquid of separation enters discharging tube through liquid outlet by valve and discharges by cylindrical gas-liquid cyclone separator, the gas vent (10) at natural gas via cylindrical gas-liquid cyclone separator top be separated flowed into horizontal type gas and liquid separator by pipeline simultaneously;
Step 3] in horizontal type gas and liquid separator, carry out Gravity Separation;
Step 4] be separated after the output channel at natural gas via horizontal separator top transfer out, residual liquid is discharged through discharging tube simultaneously.
Technique effect of the present invention is: due to gas-liquid separation device and the method for this natural gas, adopt gas-liquid cyclonic separation to carry out two-stage with gravity gas-liquid separator to the natural gas of extraction to be separated, it can make the separating effect of natural gas reach more than 99%, separative efficiency is high, can skid, mobile, be applicable to the needs of unmanned station for enhancing gas pressure.The gas-liquid separation of natural gas transport booster station can be widely used in.Combine with cyclonic separation and Gravity Separation, cyclonic separation is that the first order is separated, and can be separated the liquid of 90-97%, horizontal vessel is the second-order separation, and relying on Gravity Separation mist droplet state liquid, is that separating effect reaches 98-99%.Cyclonic separation relies on fluid velocity to carry out centrifugation, and Gravity Separation relies on gravity to realize natural separation.And the gas-liquid cyclone separator 2 carrying out one-level separation is pipe column types, the second-order separation adopt the horizontal type gas and liquid separator 6 of small volume thus volume is little can skid, mobile.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the present invention will be further described:
Fig. 1 is embodiment 1 structural representation.
Reference numeral is as follows:
1. entrance, 2. cylindrical gas-liquid cyclone separator, 3. the first liquid level sensor, 4. valve, 5. pipeline, 6. horizontal type gas and liquid separator, 7. discharging tube, 8. output channel, 9. the second liquid level sensor, 10. gas vent, 11. liquid outlets.
Detailed description of the invention
The embodiment of the present invention relates to the gas-liquid separating method of this natural gas, it adopts gas-liquid cyclonic separation to carry out two-stage with gravity gas-liquid separator to the natural gas of extraction and is separated, natural gas is first introduced from the entrance of gas-liquid cyclone separator and carries out first order separation, the vortex formed through gas-liquid cyclone separator produces centrifugal force and buoyancy, its centrifugal acceleration force of gravity acceleration is high, the gas of natural gas and fluid separation applications are opened, liquid is discharged by liquid outlet downwards; Gas then upwards flows into gravity gas-liquid separator by the pipeline of gas vent and carries out second time separation, and the gas after separation enters transfer pipeline, and liquid is discharged from discharging tube.
Embodiment 1: as shown in Figure 1: the gas-liquid separation device of this natural gas, it comprises a cylindrical gas-liquid cyclone separator 2 and a gravity horizontal type gas and liquid separator 6, the entrance 1 of cylindrical gas-liquid cyclone separator 2 is communicated with natural gas input pipe, the liquid outlet 11 of cylindrical gas-liquid cyclone separator 2 bottom is communicated with discharging tube 7 by valve 4, gas vent 10 and horizontal type gas and liquid separator 6 UNICOM on cylindrical gas-liquid cyclone separator 2 top, the delivery port of horizontal type gas and liquid separator 6 bottom is also communicated with discharging tube 7.The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Embodiment 2: as shown in Figure 1, on the basis of above-described embodiment, the gas-liquid separation device of this natural gas, comprise a cylindrical gas-liquid cyclone separator 2 and a horizontal type gas and liquid separator 6, this cylindrical gas-liquid cyclone separator 2 is with inclination tangential inlet 1 and gas vent 10 and liquid outlet 11.
Above-mentioned gas outlet 10 connects the entrance point of horizontal type gas and liquid separator 6 by pipeline 5, liquid outlet 11 is connected with valve 4; At cylindrical gas-liquid cyclone separator 2 built with the first liquid level sensor 3 for measuring liquid level, horizontal type gas and liquid separator 6 there are the output channel 8 for gas and discharging tube 7, the second liquid level sensor 9 for measuring liquid level is also housed in horizontal type gas and liquid separator 6.Wherein, the first liquid level sensor 3 and the second liquid level sensor 9 are respectively used to measure the liquid level in cylindrical gas-liquid cyclone separator 2 and horizontal type gas and liquid separator 6, and provide liquid level signal, with by-pass valve control 4 discharge opeing.
The gas feed of above-mentioned horizontal type gas and liquid separator 6 and gas outlet can install net grid device and spray trap to improve separating effect.
The angle of above-mentioned inclination tangential inlet 1 may be selected to be 65 °-75 °, and wherein best angle is 68 °.
The gas-liquid separation device of above-mentioned natural gas that the present invention relates to is utilized to carry out the process of work as follows:
A gas-liquid separating method for natural gas, comprises following steps:
Step 1] natural gas is entered in cylindrical gas-liquid cyclone separator 2 by the tangential inlet 1 that tilts;
Step 2] liquid of separation discharges from valve 4 through liquid outlet 11, transferred out by the natural gas via gas vent 10 of separation simultaneously by cylindrical gas-liquid cyclone separator 2.
The gas-liquid separating method of another kind of natural gas, comprises following steps:
Step 1] natural gas is entered in cylindrical gas-liquid cyclone separator 2 by the tangential inlet 1 that tilts;
Step 2] liquid of separation discharges from valve 4 through liquid outlet 11 by cylindrical gas-liquid cyclone separator 2, the natural gas via gas vent 10 of separation flowed into horizontal type gas and liquid separator 6 by the pipeline 5 at cylindrical gas-liquid cyclone separator 2 top simultaneously;
Step 3] in horizontal type gas and liquid separator 6, carry out Gravity Separation;
Step 4] be separated after the output channel (8) at natural gas via horizontal separator (6) top transfer out, residual liquid is discharged through discharging tube (7) simultaneously.
The cylindrical gas-liquid cyclone separator 2 that the present embodiment adopts is a kind of novel gas-liquid cyclone separators, after natural gas tangentially enters cylindrical gas-liquid cyclone separator 2 along tube wall, the vortex of formation creates the centrifugal force that centrifugal acceleration force of gravity acceleration wants high times, gravity and buoyancy, at gravity, under centrifugal force and buoyancy synergy, the gas of natural gas and fluid separation applications are opened, wherein, liquid is radially downward is discharged by liquid outlet 11, gas is then upwards discharged by gas vent 10, cylindrical gas-liquid cyclone separator 2 can meet the separation completely (can reach gas-liquid separation more than 90%) of gas-liquid completely.
The operation of cylindrical gas-liquid cyclone separator 2 is subject to the restriction of two factors, the liquid content namely in top stream and the air content in bottom liquid stream.Occur in air-flow that the sign of liquid shows to start in air-flow to carry liquid; Equally, in bottom liquid stream, the appearance of bubble represents in liquid stream and starts to carry gas.Eliminating and carrying natural gas in carrying of liquids and liquid in natural gas is highly determined by air velocity and cylindrical gas-liquid cyclone separator 2.Balance liquid level in cylindrical gas-liquid cyclone separator 2 (operationally, after cyclonic separation, liquid is to dirty, and gas is to upper reaches, the liquid level of individual dynamic equilibrium is had in the separator, too low meeting makes gas to dirty, and too high meeting makes liquid to upper reaches) determine that (determined by the opening degree of valve 4, open degree is little by the pressure reduction between gas vent 10 and liquid outlet 11, liquid path resistance is large, liquid flow is slow, and gas path comparative resistance is little, and gas flowing is fast).Because the operation power of cylindrical gas-liquid cyclone separator 2 relies on self pressure head, loss in head amount is below 5%, all very little (pressure head is exactly pressure for the friction pressure of cylindrical gas-liquid cyclone separator 2 inside and local Pressure Drop, eddy flow and general flowing all can cause pressure to reduce, namely cause energy loss, separator caliber is large, and flow resistance is just little, and pressure loss amount is just little).Therefore the Pressure Drop that liquid level needs to adjust natural gas is balanced, pressure reduction is changed by Open valve 4 size, thus (valve 4 is used to discharge opeing to make to reach balance between gas vent 10 and liquid outlet 11, also be used for balancing pressure reduction, regulate, can continuous draining, natural gas also can not be allowed to flow through).
Natural gas is after cylindrical gas-liquid cyclone separator 2 first order is separated, and enter horizontal type gas and liquid separator 6 and carry out second level separation, the size of horizontal type gas and liquid separator 6 is determined according to fractional dose size, and be roughly long 2-4 meters, diameter is 0.5-1.5 meters.Horizontal type gas and liquid separator 6 mainly Gravity Separation, can install net grid device and spray trap to improve separating effect at gas feed and gas outlet.The separating effect of its natural gas of method of the present invention is adopted to reach more than 99%.
Therefore, adopt cylindrical gas-liquid cyclone separator greatly to reduce costs and weight of equipment, be particularly useful for skid mounted equipment.Carry out gas-liquid separation before entering conveyance conduit using cylindrical gas-liquid cyclone separator as natural gas, there is volume little, the advantage that efficiency is high, the space size requirement of skid can be met.
Claims (1)
1. the gas-liquid separating method of a natural gas, it is characterized in that: it adopts cylindrical gas-liquid cyclone separator to carry out two-stage with gravity horizontal type gas and liquid separator to the natural gas of extraction and is separated, natural gas is first introduced from the entrance of cylindrical gas-liquid cyclone separator and carries out first order separation, the vortex formed through cylindrical gas-liquid cyclone separator produces centrifugal force and buoyancy, its centrifugal acceleration force of gravity acceleration is high, the gas of natural gas and fluid separation applications are opened, liquid is discharged by liquid outlet downwards; Gas then upwards flows into gravity horizontal type gas and liquid separator by the pipeline of gas vent and carries out second time separation, and the gas after separation enters output channel, and liquid is discharged from discharging tube;
The gas-liquid separating method of this natural gas comprises following steps:
Step 1] natural gas is entered in cylindrical gas-liquid cyclone separator (2) by the tangential inlet that tilts (1);
Step 2] cylindrical gas-liquid cyclone separator (2) by be separated liquid through liquid outlet (11) by valve (4) enter discharging tube (7) discharge, simultaneously by be separated natural gas via cylindrical gas-liquid cyclone separator (2) top gas vent (10) by pipeline (5) flow into gravity horizontal type gas and liquid separator (6);
Step 3] in gravity horizontal type gas and liquid separator (6), carry out Gravity Separation;
Step 4] be separated after the output channel (8) at natural gas via gravity horizontal type gas and liquid separator (6) top transfer out, residual liquid is discharged through discharging tube (7) simultaneously;
The device that the gas-liquid separating method of this natural gas adopts is gas-liquid separation device, described gas-liquid separation device comprises a cylindrical gas-liquid cyclone separator (2) and a gravity horizontal type gas and liquid separator (6), the entrance (1) of cylindrical gas-liquid cyclone separator (2) is communicated with natural gas input pipe, the liquid outlet (11) of cylindrical gas-liquid cyclone separator (2) bottom is communicated with discharging tube (7) by valve (4), gas vent (10) and gravity horizontal type gas and liquid separator (6) UNICOM on cylindrical gas-liquid cyclone separator (2) top, the delivery port of gravity horizontal type gas and liquid separator (6) bottom is also communicated with discharging tube (7), cylindrical gas-liquid cyclone separator (2) is equipped with the first liquid level sensor (3), and gravity horizontal type gas and liquid separator (6) is equipped with the second liquid level sensor (9), the gas feed of described gravity horizontal type gas and liquid separator (6) and gas outlet are provided with net grid device and spray trap to improve separating effect, the entrance (1) of described cylindrical gas-liquid cyclone separator (2) is inclination tangential inlet (1), and the tangential angle that tilts is 68 °,
Its principle is: natural gas creates along the vortex formed after tube wall tangentially enters cylindrical gas-liquid cyclone separator centrifugal force, gravity and the buoyancy that centrifugal acceleration force of gravity acceleration wants high times, under gravity, centrifugal force and buoyancy synergy, the gas of natural gas and fluid separation applications are opened, wherein, liquid is radially downward is discharged by liquid outlet, gas is then upwards discharged by gas vent, and cylindrical gas-liquid cyclone separator meets the separation completely of gas-liquid completely;
Eliminating and carrying natural gas in carrying of liquids and liquid in natural gas is determined by air velocity and cylindrical gas-liquid cyclone separator height; Balance liquid level in cylindrical gas-liquid cyclone separator, operationally, after cyclonic separation, liquid is to dirty, and gas is to upper reaches, and in the middle of cylindrical gas-liquid cyclone separator, have the liquid level of individual dynamic equilibrium, too low meeting makes gas to dirty, and too high meeting makes liquid to upper reaches; Determined by the pressure reduction between gas vent and liquid outlet, namely determined by the opening degree of valve, open degree is little, and liquid path resistance is large, and liquid flow is slow, gas path comparative resistance is little, because the operation power of cylindrical gas-liquid cyclone separator relies on self pressure head, loss in head amount is below 5%, and friction pressure and the local Pressure Drop of cylindrical gas-liquid cyclone separator inside are all very little, change pressure reduction by Open valve size, thus make to reach balance between gas vent and liquid outlet.
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| CN201110343457.9A CN103084285B (en) | 2011-11-03 | 2011-11-03 | Gas-liquid separation device for natural gas and gas-liquid separation method therefor |
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