CN108913251B - Bubble cap special for natural gas dehydration - Google Patents
Bubble cap special for natural gas dehydration Download PDFInfo
- Publication number
- CN108913251B CN108913251B CN201810946084.6A CN201810946084A CN108913251B CN 108913251 B CN108913251 B CN 108913251B CN 201810946084 A CN201810946084 A CN 201810946084A CN 108913251 B CN108913251 B CN 108913251B
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- CN
- China
- Prior art keywords
- gas
- outer shell
- riser
- pipe
- bubble cap
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
- B01D2256/245—Methane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/814—Magnetic fields
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention relates to a bubble cap special for natural gas dehydration, belonging to the technical field of petrochemical tower parts. The device consists of an outer shell and a gas lift pipe, wherein the gas lift pipe is arranged in the outer shell, a central pipe is arranged between the outer shell and the gas lift pipe through an adjusting nut and an adjusting spring, and one end of the central pipe extends to the upper part of the outer shell; the other end of the central tube extends into the riser; a solenoid is arranged in the central tube extending into the riser, and the solenoid is communicated with an external power supply. The bubble cap has good defoaming performance, high mass transfer efficiency, reduced pressure, large flux and good separation effect, improves the product quality and reduces the energy consumption of the absorption tower; during the working process; triethylene glycol is in countercurrent contact with wet natural gas in an absorption tower to absorb steam in the gas, so that energy consumption is reduced; the riser of the bubble cap is provided with a top seam which is matched with the inclined tooth seam on the shell, thereby being more convenient for the flow of gas and liquid.
Description
Technical Field
The invention relates to a bubble cap special for natural gas dehydration, belonging to the technical field of petrochemical tower parts.
Background
The oilfield associated gas and the gas field gas are collectively called natural gas, and are good natural energy and chemical fuel. Untreated natural gas generally contains saturated water vapor, and some natural gas fields also contain acid gases such as hydrogen sulfide, carbon dioxide and the like, and some natural gas fields also contain nitrogen. When natural gas contains acid gases such as hydrogen sulfide and carbon dioxide, the occurrence of liquid water causes corrosion to pipelines and equipment. For the above reasons, if natural gas produced in a sea dome gas mountain or a Shan gas field needs to be transported through a long-distance pipeline, dehydration treatment is required at sea to prevent hydrate formation and corrosion of pipelines by acid gas during transportation.
The essence of dehydration of natural gas is to change natural gas from saturated to unsaturated. The conventional natural gas dehydration method can be classified into a solvent absorption method, a solid adsorption method, a freeze separation method, a chemical reaction method, and the like. Among them, the chemical reaction method has few industrial applications, and the solvent absorption method and the solid adsorption method have extremely wide applications.
However, due to the bubble cap design reason of the existing absorption tower for dehydrating natural gas, in order to ensure that the gas phase and the liquid phase are fully contacted, a certain number of channels are uniformly arranged on the tower plate to allow the gas to pass through the liquid layer on the plate from bottom to top; the working is usually as follows:
(1) The liquid leaks in a large amount through the holes;
(2) The entrainment quantity exceeds the allowable value, so that the plate efficiency is obviously reduced;
(3) If the liquid flow is too small, the liquid layer on the overflow weir is insufficient in height, so that the uniform distribution of liquid flow is affected, and the plate efficiency is reduced;
(4) When the flow rate of the liquid is too large, the residence time of the liquid in the downcomer is too short, bubbles entrained by the liquid phase are not separated, so that gas phase back mixing can be caused, and the plate efficiency is reduced;
(5) When the gas-liquid flow is too large, the downcomer is caused to flood, and the normal operation of the tower is impaired.
Therefore, improvements are needed.
Disclosure of Invention
The invention aims at: the bubble cap special for natural gas dehydration has the advantages of high mass transfer efficiency, low pressure, high flux and good separation effect, so that the product quality is improved, and the energy consumption of equipment is reduced.
The technical scheme of the invention is as follows:
a bubble cap dedicated for dehydration of natural gas, which consists of an outer shell and a riser, and is characterized in that: a gas lift pipe is arranged in the outer shell, a central pipe is arranged between the outer shell and the gas lift pipe through an adjusting nut and an adjusting spring, and one end of the central pipe extends to the upper part of the outer shell; the other end of the central tube extends into the riser; a solenoid is arranged in the central tube extending into the riser, and the solenoid is communicated with an external power supply.
Oblique tooth gaps are uniformly distributed on the circumference of the outer shell.
The height of the inclined tooth gap is 50mm, and the width of the inclined tooth gap is 10mm.
The gas lift is S-shaped, and the top of the gas lift is radially provided with a top seam.
The invention has the advantages that:
(1) The ascending gas mixture in the outer shell is turned back downwards along with the rotation of the liquid, so that the pressure drop can be effectively reduced, the gas flow rate is improved, the liquid flowing down from the downcomer is sprayed by the rotating bubble cap riser, and the gas and the liquid are better contacted;
(2) The gas is split, layered and multi-azimuth enters the liquid, so that the contact of gas and liquid phases is increased, and the dehydration area is increased;
(3) Through the guiding function of the bubble cap riser, the gas is uniformly distributed in a flowing way, and meanwhile, the blocking of the bubble cap can be prevented, so that the dewatering area is increased;
(4) The adverse effect of the gradient of the liquid level of the tower plate on the operation condition is reduced due to the action of the top seam;
(5) The defoaming performance is good, the mass transfer efficiency is high, the pressure is reduced, the flux is large, the separation effect is good, the product quality is improved, and the energy consumption of the absorption tower is reduced;
(6) Triethylene glycol is in countercurrent contact with wet natural gas in an absorption tower to absorb steam in the gas, so that energy consumption is reduced;
(7) The rotating speed of the bubble cap riser can be adjusted according to actual conditions, so that the bubble cap riser is convenient to control;
(8) The bubble cap riser is provided with a top seam which is matched with the inclined tooth seam on the shell, so that the flow of gas and liquid is facilitated;
(9) The planar mode that the traditional column plate takes the liquid layer on the plate as the main mass transfer area is innovative, the mass transfer area of the gas phase and the liquid phase is increased, and the space utilization rate of the column plate is improved;
(10) The bubble cap riser can generate proper heat when rotating, so that the operating temperature of the absorption tower is increased, the impression of condensation in characteristic environments such as winter and the like of the triethylene glycol solution can be effectively prevented, and the dew point drop can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the outer casing of the present invention;
fig. 3 is a schematic top view of the present invention and a draft tube.
In the figure: 1. the device comprises an outer shell, 2, a riser, 3, a top seam, 4, an adjusting nut, 5, an adjusting spring, 6, a central tube, 7 and a solenoid; 8. oblique tooth slits.
Detailed Description
The bubble cap special for natural gas dehydration consists of an outer shell 1 and a gas lift pipe 2, wherein the gas lift pipe 2 is arranged in the outer shell 1, the gas lift pipe 2 is S-shaped, and a top seam 3 is radially arranged at the top of the gas lift pipe 2.
A central tube 6 is arranged between the outer shell 1 and the riser 2 through an adjusting nut 4 and an adjusting spring 5, and one end of the central tube 6 extends to the upper part of the outer shell 1; the other end of the central tube 6 extends into the riser 2; a solenoid 7 is installed in a center tube 6 extending into the draft tube 2, and the solenoid 7 of the present invention is an energized solenoid, and a device having an iron core inside and magnetically formed like a magnet by a coil to which current is applied is called an energized solenoid. The energized spiral is typically formed in a bar or shoe shape. The iron core is made of soft iron or silicon steel which is easy to magnetize and easy to lose magnetism. Such energized solenoids are magnetic when energized and disappear upon de-energization. The magnetically sensitive wire external to the energized solenoid is emanating from the north pole of the solenoid and back to the south pole. However, the direction of the magnetic field inside the energized solenoid is from the south pole to the north pole of the solenoid, and the magnetism of the energized solenoid changes depending on factors such as the magnitude of the current, the number of turns, the presence or absence of the core, etc., and the greater the current, the greater the number of turns, and the greater the magnetic induction intensity when the core is present. The calculation formula of the magnetic field of the electrified solenoid is as follows:
wherein: dB is a micro magnetic field, T;
permeability->，T/A；
The length of the microwire, m;
r radius, m.
In general terms, the force acting on a charged particle as it moves in a magnetic field is a lorentz force, calculated by:
wherein: f is Lorentz force, N;
q is the charge amount of the charged particles, C;
b is the magnetic field size, T.
The solenoid 7 communicates with an external power source. The circumference of the outer shell 1 of the bubble cap is uniformly distributed with helical slits 8, the height of the helical slits 8 is 50mm, and the width of the helical slits 8 is 10mm.
When the bubble cap special for natural gas dehydration works, liquid flows through each layer of tower plates of the absorption tower from top to bottom in sequence under the action of gravity and is discharged to the bottom of the tower; the gas is pushed by the pressure difference to pass through all layers of tower plates from bottom to top in turn and is discharged from the top of the tower. Each tray holds a liquid layer of a certain depth, and gas is dispersed into the liquid layer through the tray for successive contact mass transfer. After the solenoid 7 in the central tube 6 is electrified, a magnetic field exists around the electrified wire, so that the originally charged riser 2 keeps rotating (the current control is not too high, as long as the rotation of the riser 2 can be kept, the rotation speed is not too high). The natural gas to be dehydrated after three-phase separation is pressurized by a pressurizing pump before dehydration, and the pressurized gas has a certain speed, so that the natural gas enters an absorption tower. Since the draft tube 2 is S-shaped (spiral) in the process of rotation, the air pressure at the lower part of the draft tube 2 is reduced, and the air is sucked into the draft tube 2 from bottom to top like a vortex, thereby increasing the flow rate of the air and entering the gap between the outer shell 1 and the draft tube 2 through the top slit at the top of the draft tube 2. The liquid enters the human outer shell 1 from the inclined tooth slits 8 of the outer shell 1 and rotates along with the rotation of the gas lift pipe 2, and meanwhile, the liquid is in violent collision with the gas-liquid mixture rising at high speed in the outer shell 1, and part of the gas-liquid returns downwards after the rising gas mixture in the outer shell 1 collides with the rotating gas lift pipe 2; the gas-liquid mixture sprayed out of the outer shell 1 and the gas-liquid mixture sprayed out of the adjacent bubble cap outer shell 1 on the tower plate are strongly sprayed and collide with each other between the bubble caps. In this process; the gas-liquid two phases are contacted in the gap between the outer shell 1 and the riser 2, and the gas and the gradually dehydrated natural gas enter the outer shell 1 through the helical slits 8 along with the natural gas continuously sprayed from the upper part, after the secondary bubbling mass transfer, the gas rises to the upper layer tower plate, and the liquid falls back to the tower plate and flows to the lower layer tower plate through the downcomer. The primarily dehydrated natural gas passes through each layer of tower plates in the same way, so that the purpose of dehydration is achieved, wherein moisture is contacted with triethylene glycol solution, saturated steam attached to the natural gas is absorbed and dehydrated by utilizing the physical property of the triethylene glycol, dry gas flows out from the top of the tower, and lean ethylene glycol after water absorption is changed into rich ethylene glycol which is recovered and reused from the bottom of the tower.
Claims (1)
1. A bubble cap special for natural gas dehydration, which consists of an outer shell (1) and a riser (2), and is characterized in that: a gas lift pipe (2) is arranged in the outer shell (1), a central pipe (6) is arranged between the outer shell (1) and the gas lift pipe (2) through an adjusting nut (4) and an adjusting spring (5), and one end of the central pipe (6) extends to the upper part of the outer shell (1); the other end of the central tube (6) extends into the riser (2); a solenoid (7) is arranged in a central tube (6) extending into the riser (2), and the solenoid (7) is communicated with an external power supply; oblique tooth gaps (8) are uniformly distributed on the circumference of the outer shell (1); the height of the inclined tooth seam (8) is 50mm, and the width of the inclined tooth seam (8) is 10mm; the gas lift pipe (2) is S-shaped, and a top slit (3) is radially arranged at the top of the gas lift pipe (2);
when the bubble cap works, after a solenoid (7) in a central tube (6) is electrified, a magnetic field exists around a charged wire, so that an originally charged riser (2) keeps rotating; because the gas raising pipe (2) is S-shaped, the gas pressure at the lower part of the gas raising pipe (2) is reduced in the rotating process, and the gas is sucked into the gas raising pipe (2) from bottom to top, so that the flow rate of the gas is improved, and the gas enters a gap between the outer shell (1) and the gas raising pipe (2) through a top seam (3) at the top of the gas raising pipe (2); the liquid enters the outer shell (1) from the helical gaps (8) of the outer shell (1) and rotates along with the rotation of the riser (2), and meanwhile, the liquid collides with the gas-liquid mixture rising at a high speed in the outer shell (1) strongly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946084.6A CN108913251B (en) | 2018-08-20 | 2018-08-20 | Bubble cap special for natural gas dehydration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946084.6A CN108913251B (en) | 2018-08-20 | 2018-08-20 | Bubble cap special for natural gas dehydration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108913251A CN108913251A (en) | 2018-11-30 |
| CN108913251B true CN108913251B (en) | 2023-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810946084.6A Active CN108913251B (en) | 2018-08-20 | 2018-08-20 | Bubble cap special for natural gas dehydration |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB345565A (en) * | 1930-05-19 | 1931-03-26 | Harold Moore | Improvements in or relating to dephlegmator or bubble towers |
| CN2287999Y (en) * | 1997-04-23 | 1998-08-19 | 刘龙畴 | Rotary jetting absorption column tray |
| CN101822924A (en) * | 2010-05-11 | 2010-09-08 | 南京航空航天大学 | Centrifugal gas-liquid separator |
| CN105879827A (en) * | 2016-05-26 | 2016-08-24 | 江苏锐华化工装备股份有限公司 | Bubble cap special for lipid hydrolysis |
| CN205965487U (en) * | 2016-07-16 | 2017-02-22 | 江苏民生重工有限公司 | Rotatory bubble cap tray |
| CN206587498U (en) * | 2017-02-27 | 2017-10-27 | 中国石油化工股份有限公司 | A kind of gas-liquid separator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200936960A (en) * | 2008-02-20 | 2009-09-01 | Grand Mate Co Ltd | LPG flow rate control valve |
-
2018
- 2018-08-20 CN CN201810946084.6A patent/CN108913251B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB345565A (en) * | 1930-05-19 | 1931-03-26 | Harold Moore | Improvements in or relating to dephlegmator or bubble towers |
| CN2287999Y (en) * | 1997-04-23 | 1998-08-19 | 刘龙畴 | Rotary jetting absorption column tray |
| CN101822924A (en) * | 2010-05-11 | 2010-09-08 | 南京航空航天大学 | Centrifugal gas-liquid separator |
| CN105879827A (en) * | 2016-05-26 | 2016-08-24 | 江苏锐华化工装备股份有限公司 | Bubble cap special for lipid hydrolysis |
| CN205965487U (en) * | 2016-07-16 | 2017-02-22 | 江苏民生重工有限公司 | Rotatory bubble cap tray |
| CN206587498U (en) * | 2017-02-27 | 2017-10-27 | 中国石油化工股份有限公司 | A kind of gas-liquid separator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108913251A (en) | 2018-11-30 |
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