CN111732982A - Natural gas dewaxing method and device - Google Patents
Natural gas dewaxing method and device Download PDFInfo
- Publication number
- CN111732982A CN111732982A CN202010525522.9A CN202010525522A CN111732982A CN 111732982 A CN111732982 A CN 111732982A CN 202010525522 A CN202010525522 A CN 202010525522A CN 111732982 A CN111732982 A CN 111732982A
- Authority
- CN
- China
- Prior art keywords
- dewaxing
- natural gas
- pipeline
- liquid
- separator
- Prior art date
- 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.)
- Granted
Links
Images
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
Abstract
The invention relates to the technical field of natural gas dewaxing, in particular to a natural gas dewaxing method and a device, wherein the natural gas dewaxing method is carried out according to the following steps: the device of the natural gas dewaxing method comprises a feed gas filtering separator, a dewaxing absorption tower, a tower top liquid remover, a dehydration and hydrocarbon removal assembly, a low-temperature separator and a condensate flash tank. The dewaxing device has the characteristics of reasonable and compact structure, convenience in use, high dewaxing efficiency, low operating cost, strong adaptability, wide application range and flexibility in operation, and can be used for dewaxing the waxy natural gas by using the absorption and analysis principles and reducing the waxy components in the natural gas to zero after dewaxing, thereby effectively avoiding the wax blockage phenomenon of subsequent process equipment.
Description
Technical Field
The invention relates to the technical field of natural gas dewaxing, in particular to a natural gas dewaxing method and a natural gas dewaxing device.
Background
As a clean and efficient energy source, the natural gas not only can optimize the energy structure and relieve the contradiction between supply and demand, but also plays an important role in improving the urban grade, improving the environment, improving the quality of life of people and realizing sustainable development. Before natural gas extracted from a gas field is input into a finished gas pipe network, the natural gas is usually subjected to dealkylation and dehydration treatment, and byproducts such as ethane, condensate oil, liquefied gas, light hydrocarbon and the like produced by natural gas condensate are recovered. However, natural gas produced from gas fields often contains wax components in varying proportions. The main component of the wax is a mixture of solid high-grade alkanes (C15 +, the number of carbon atoms is more than 15) and the freezing point is high (usually 10 ℃ to 25 ℃), so that wax precipitation occurs in a heat exchanger, a low-temperature separator and the like in the dehydration and dealkylation processes of natural gas, the working efficiency of the heat exchanger is reduced, the low-temperature separator elements are blocked and damaged, the hydrocarbon and water dew points of the exported natural gas do not reach the standard, and the normal and stable operation of a natural gas treatment device is seriously influenced.
For the wax blockage phenomenon of the natural gas treatment device, the operation unit mostly adopts a method of stopping production and cleaning, and the efficiency is low and the safety risk is high. The widely applied dewaxing process for cracked gas (with components similar to natural gas) in the oil refining field adopts molecular sieve adsorption, and the process adopts a 5A molecular sieve as an adsorbent, has the defects of small adsorption capacity, complex process flow, more equipment, high energy consumption and the like, and is difficult to meet the requirement of large-scale production of natural gas treatment plants. The existing wax blockage prevention methods of domestic natural gas treatment plants mainly adopt hydrocarbon injection dissolution (patent numbers CN108913252A and CN 105567363A) or adopt outsourcing dewaxing agents for washing (patent number CN 105779051A), the methods seriously depend on the solubility of wax components in injected hydrocarbon, the control requirements on the components of the injected hydrocarbon are extremely strict, the injected hydrocarbon (or condensate oil) needs to be transported and supplied from the outside, and the defects of poor adaptability, low dewaxing efficiency, high operation cost, difficult complete avoidance of wax precipitation in practical application and the like exist.
Disclosure of Invention
The invention provides a natural gas dewaxing method and a natural gas dewaxing device, overcomes the defects of the prior art, and can effectively solve the problems of poor adaptability of a dewaxing agent, low dewaxing efficiency and high operation cost in the prior natural gas dewaxing process.
One of the technical schemes of the invention is realized by the following measures: a natural gas dewaxing process which comprises the following steps: firstly, wax-containing natural gas enters a feed gas filtering separator from a wax-containing natural gas pipeline to remove liquid drops with the diameter of more than 10 microns carried in the wax-containing natural gas, the liquid drops removed from the wax-containing natural gas are discharged from a liquid discharge pipeline of the filtering separator, and the wax-containing natural gas from which the liquid drops are removed enters a dewaxing absorption tower from a feed pipeline of the absorption tower; secondly, enabling a dewaxing agent I to enter a dewaxing absorption tower from a first dewaxing agent feeding pipeline, enabling waxy natural gas in the dewaxing absorption tower to reversely contact with the dewaxing agent I for dewaxing, discharging a waxy condensate obtained after dewaxing to a condensate flash tank from an absorption tower discharge pipeline, and enabling the dewaxed natural gas obtained after dewaxing to enter a tower top liquid remover from an absorption tower discharge pipeline; thirdly, removing liquid drops with the size of more than 10 microns in the dewaxed natural gas in a tower top liquid remover, discharging the liquid drops obtained in the tower top liquid remover through a liquid removing device liquid discharge pipeline, feeding the dewaxed natural gas with the liquid drops removed in the tower top liquid remover into a dehydration and dealkylation component through a liquid removing device gas discharge pipeline for cooling, discharging the cooled natural gas from a finished gas output pipeline, and feeding condensate obtained by cooling and condensing in the dehydration and dealkylation component into a low-temperature separator through a separator feed pipeline for gas-liquid separation; fourthly, the natural gas separated in the low-temperature separator returns to the dehydration and hydrocarbon removal assembly to recover cold energy and then is discharged by a finished gas output pipeline, 90 to 99 percent of the total mass of the condensate separated in the low-temperature separator enters a dewaxing absorption tower through a second dewaxing agent feeding pipeline to dewax the natural gas containing wax, and 1 to 10 percent of the total mass of the condensate separated in the low-temperature separator enters a condensate flash tank through a flash tank feeding pipeline; and fifthly, reversely contacting and dewaxing the natural gas separated by flash evaporation in the condensate flash tank and 1-10% of the total mass of the condensate separated in the low-temperature separator, feeding the dewaxed gas into the dehydration and dealkylation assembly from a flash tank exhaust pipeline, cooling, dehydrating and dealkylating again, and repeating the fourth step of operation, wherein the condensate separated in the condensate flash tank is discharged from a flash tank liquid discharge pipeline.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the first dewaxing agent is liquid hydrocarbon, and the condensate obtained by separation in the low-temperature separator is the second dewaxing agent.
The second technical scheme of the invention is realized by the following measures: a device for natural gas dewaxing method comprises a raw gas filtering separator, a dewaxing absorption tower, a tower top liquid remover, a dehydration and dealkylation assembly, a low-temperature separator and a condensate flash tank, wherein an inlet of the raw gas filtering separator is fixedly communicated with a wax-containing natural gas pipeline, an absorption tower feeding pipeline is fixedly communicated between an outlet at the top of the raw gas filtering separator and an inlet at the lower part of the dewaxing absorption tower, a first dewaxing agent feeding pipeline is fixedly communicated with an inlet at the middle part of the dewaxing absorption tower, an absorption tower exhaust pipeline is fixedly communicated between an outlet at the top of the dewaxing absorption tower and an inlet at the middle part of the tower top liquid remover, a liquid removing exhaust pipeline is fixedly communicated between an outlet at the top of the tower top liquid remover and an inlet at the upper part of the dehydration and dealkylation assembly, a finished gas output pipeline is fixedly communicated with the top of the dehydration and dealkylation assembly, and a separator exhaust pipeline is, a separator feeding pipeline is fixedly communicated between an outlet at the lower part of the dehydration and dealkylation assembly and an inlet at the middle part of the low-temperature separator, a second dewaxing agent feeding pipeline is fixedly communicated between an outlet at the bottom part of the low-temperature separator and an inlet at the upper part of the dewaxing absorption tower, a dewaxing absorption filler column is seated at an outlet at the top part of the condensate flash tank, a top outlet of the condensate flash tank is fixedly communicated with an inlet at the bottom part of the dewaxing absorption filler column, a flash tank vent pipeline is fixedly communicated between an inlet at the bottom part of the dehydration and dealkylation assembly and an outlet at the top part of the dewaxing absorption filler column, a flash tank feeding pipeline is fixedly communicated between an inlet at the top part of the dewaxing absorption filler column and the second dewaxing agent feeding pipeline, an absorption tower drainage pipeline is fixedly communicated between an inlet at the upper part of the condensate flash tank and an outlet at the bottom part of the dewaxing absorption tower, a liquid, a liquid discharge pipeline of the filtering separator is fixedly communicated between the bottom outlet of the raw material gas filtering separator and the liquid discharge pipeline of the flash tank.
The following is further optimization or/and improvement of the second technical scheme of the invention:
and a dewaxing agent feeding pump is fixedly arranged on the first dewaxing agent feeding pipeline.
And a condensate booster pump is fixedly arranged on a second dewaxing agent feeding pipeline between the inlet of the feeding pipeline of the flash tank and the outlet at the bottom of the low-temperature separator.
The dewaxing device has the characteristics of reasonable and compact structure, convenience in use, high dewaxing efficiency, low operating cost, strong adaptability, wide application range and flexibility in operation, and can be used for dewaxing the waxy natural gas by using the absorption and analysis principles and reducing the waxy components in the natural gas to zero after dewaxing, thereby effectively avoiding the wax blockage phenomenon of subsequent process equipment.
Drawings
FIG. 1 is a schematic process flow diagram of the preferred embodiment of the present invention.
The codes in the figures are respectively: the device comprises a raw material gas filtering separator, a dewaxing absorption tower, a tower top liquid remover, a dehydration and hydrocarbon removal assembly, a low-temperature separator, a condensate flash tank, a wax-containing natural gas pipeline, an absorption tower feeding pipeline, a first dewaxing agent feeding pipeline, a first absorption tower exhaust pipeline, an absorption tower exhaust pipeline, a liquid remover exhaust pipeline, a finished gas outward conveying pipeline, a separator exhaust pipeline, a separator feeding pipeline, a second dewaxing agent feeding pipeline, a flash tank discharging pipeline, a flash tank feeding pipeline, an absorption tower liquid discharging pipeline, a liquid remover liquid discharging pipeline, a flash tank liquid discharging pipeline, a filtering separator liquid discharging pipeline, a dewaxing agent feeding pump, a condensate booster pump and a dewaxing absorption packing column, wherein the raw material gas filtering separator is used as 1, the dewaxing absorption tower is used as 2, the tower top liquid remover is used as 3, the dehydration and hydrocarbon removal assembly is used as 4.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: as shown in the attached figure 1, the natural gas dewaxing method is carried out according to the following method: firstly, wax-containing natural gas enters a feed gas filtering separator 1 from a wax-containing natural gas pipeline 7 to remove liquid drops with the diameter of more than 10 microns carried in the wax-containing natural gas, the liquid drops removed from the wax-containing natural gas are discharged from a filtering separator liquid discharge pipeline 21, and the wax-containing natural gas from which the liquid drops are removed enters a dewaxing absorption tower 2 from an absorption tower feed pipeline 8; secondly, a dewaxing agent I enters a dewaxing absorption tower 2 from a first dewaxing agent feeding pipeline 9, waxy natural gas in the dewaxing absorption tower 2 reversely contacts with the dewaxing agent I for dewaxing, waxy condensate obtained after dewaxing is discharged to a condensate flash tank 6 from an absorption tower liquid discharge pipeline 18, and dewaxed natural gas obtained after dewaxing enters a tower top liquid remover 3 from an absorption tower gas discharge pipeline 10; thirdly, removing liquid drops with the size of more than 10 microns in the dewaxed natural gas in a tower top liquid remover 3, discharging the liquid drops obtained in the tower top liquid remover 3 through a liquid remover liquid discharge pipeline 19, feeding the dewaxed natural gas with the liquid drops removed in the tower top liquid remover 3 into a dehydration and dealkylation component 4 through a liquid remover gas discharge pipeline 11 for cooling, discharging the cooled natural gas through a finished gas output pipeline 12, and feeding condensate obtained by cooling and condensing in the dehydration and dealkylation component 4 into a low-temperature separator 5 through a separator feed pipeline 14 for gas-liquid separation; fourthly, the natural gas separated in the low-temperature separator 5 returns to the dehydration and hydrocarbon removal component 4 to recover cold energy and then is discharged through a finished gas output pipeline 12, 90 to 99 percent of the total mass of the condensate separated in the low-temperature separator 5 enters the dewaxing absorption tower 2 through a second dewaxing agent feeding pipeline 15 to dewax the natural gas containing wax, and 1 to 10 percent of the total mass of the condensate separated in the low-temperature separator 5 enters the condensate flash tank 6 through a flash tank feeding pipeline 17; and fifthly, reversely contacting and dewaxing the natural gas separated by flash evaporation in the condensate flash tank 6 and 1-10% of the total mass of the condensate separated in the low-temperature separator 5, feeding the dewaxed natural gas into the dehydration and dealkylation assembly 4 through a flash tank exhaust pipeline 16, cooling, dehydrating and dealkylating again, and repeating the fourth step of operation, wherein the condensate separated in the condensate flash tank 6 is discharged through a flash tank liquid discharge pipeline 20.
Example 2: as shown in the attached figure 1, as the optimization of the embodiment, the first dewaxing agent is liquid hydrocarbon, and the condensate obtained by separation in the low-temperature separator is the second dewaxing agent.
In the prior art, natural gas dewaxing adopts methods such as production stopping cleaning, hydrocarbon injection dissolving, dewaxing agent washing and the like, and the methods generally have the problems of low dewaxing efficiency, poor effect, high operation cost and the like; in the invention, liquid hydrocarbon does not need to be purchased or pulled from the outside, the liquid hydrocarbon extracted from the side line of the liquefied gas tower and the low-temperature natural gas condensate of the low-temperature separator 5 can be respectively used as a first dewaxing agent and a second dewaxing agent, the first dewaxing agent and the second dewaxing agent are in countercurrent contact with the natural gas containing wax in the dewaxing absorption tower 2 for mass transfer and heat transfer, and simultaneously absorb the wax component in the natural gas, the wax component and heavy hydrocarbon content in the dewaxed natural gas can be reduced to zero, and the wax blockage phenomenon of subsequent process equipment is effectively avoided. The invention is based on the principle of absorption and analysis, has strong adaptability, can be suitable for feed gas with the methane content lower than 93 percent, not only can be suitable for dewaxing in shallow cold natural gas treatment processes such as J-T valve or propane valve refrigeration, but also can be suitable for dewaxing in cryogenic natural gas treatment processes such as expander or mixed refrigerant refrigeration, and the like, and can also be used for removing heavy hydrocarbon and the like from natural gas in LNG (liquefied natural gas) process, thereby having wide application prospect.
Example 3: as shown in the attached figure 1, the device of the natural gas dewaxing method comprises a feed gas filtering separator 1, a dewaxing absorption tower 2, a tower top liquid remover 3, a dehydration and dealkylation component 4, a low-temperature separator 5 and a condensate flash tank 6, wherein an inlet of the feed gas filtering separator 1 is fixedly communicated with a wax-containing natural gas pipeline 7, an absorption tower feeding pipeline 8 is fixedly communicated between an outlet at the top of the feed gas filtering separator 1 and an inlet at the lower part of the dewaxing absorption tower 2, a first dewaxing agent feeding pipeline 9 is fixedly communicated with an inlet at the middle part of the dewaxing absorption tower 2, an absorption tower exhaust pipeline 10 is fixedly communicated between an outlet at the top of the dewaxing absorption tower 2 and an inlet at the middle part of the tower top liquid remover 3, a liquid remover exhaust pipeline 11 is fixedly communicated between an outlet at the top of the tower top liquid remover 3 and an inlet at the upper part of the dehydration and dealkylation component 4, a separator exhaust pipeline 13 is fixedly communicated between an upper inlet of the dehydration and dealkylation assembly and a top outlet of the low-temperature separator 5, a separator feed pipeline 14 is fixedly communicated between a lower outlet of the dehydration and dealkylation assembly 4 and a middle inlet of the low-temperature separator 5, a second dewaxing agent feed pipeline 15 is fixedly communicated between a bottom outlet of the low-temperature separator 5 and an upper inlet of the dewaxing absorption tower 2, a dewaxing absorption filler column 24 is seated at a top outlet of the condensate flash tank 6, a top outlet of the condensate flash tank 6 is fixedly communicated with a bottom inlet of the dewaxing absorption filler column 24, a flash tank exhaust pipeline 16 is fixedly communicated between a bottom inlet of the dehydration and a top outlet of the dewaxing absorption filler column 24, a flash tank feed pipeline 17 is fixedly communicated between a top inlet of the dewaxing absorption filler column 24 and the second dewaxing agent feed pipeline 15, an absorption tower drainage pipeline 18 is fixedly communicated between an upper inlet of the condensate flash tank 6 and a bottom outlet of the dewaxing absorption tower 2, a liquid remover liquid drainage pipeline 19 is fixedly communicated between the bottom outlet of the tower top liquid remover 3 and the absorption tower liquid drainage pipeline 18, a flash tank liquid drainage pipeline 20 is fixedly communicated with the bottom outlet of the condensate flash tank 6, and a filtering separator liquid drainage pipeline 21 is fixedly communicated between the bottom outlet of the raw gas filtering separator 1 and the flash tank liquid drainage pipeline 20.
Example 4: as shown in FIG. 1, as an optimization of the above embodiment, a dewaxing agent feeding pump 22 is fixedly installed on the first dewaxing agent feeding line 9.
Example 5: as shown in fig. 1, as an optimization of the above embodiment, a condensate booster pump 23 is fixedly mounted on the second dewaxing agent feeding line 15 between the inlet of the flash tank feeding line 17 and the bottom outlet of the low-temperature separator 5.
In the invention, the dehydration and dealkylation component 4 is the common equipment known in the prior art, and the dehydration and dealkylation component 4 can be a dehydration and dealkylation device used in shallow cold natural gas refrigerated by a J-T valve and a dehydration and dealkylation device used in deep cold natural gas refrigerated by an expander. The dewaxing absorption tower 2 is a gas-liquid contact mass transfer device and a gas-liquid heat exchange device, can fully recover the cold energy of the low-temperature condensate separated in the low-temperature separator 5, and reduces the investment of a subsequent process heat exchange device. The device of the invention is flexibly configured, and can not only be provided with a side line extraction liquid hydrocarbon as a dewaxing agent of the dewaxing absorption tower 2 under the condition of no liquefied gas tower, but also be provided with a side line extraction liquid hydrocarbon as a dewaxing agent of the dewaxing absorption tower 2 under the condition of a liquefied gas tower to enhance the dewaxing effect, after the pressure of the liquid hydrocarbon extracted from the side line of the liquefied gas tower is increased to be 0.5MPa to 1.2MPa higher than the operating pressure of the dewaxing absorption tower 2 by a dewaxing agent feeding pump 22, the liquid hydrocarbon is input into the dewaxing absorption tower 2 for dewaxing, the liquid hydrocarbon should meet the condition that the content of C12+ (the number of carbon atoms is more than 12) components is less than 0.1 percent, and the mass of the liquid hydrocarbon entering the dewaxing absorption tower 2 accounts for 10 percent to 40 percent of the total mass of discharged condensate, thereby ensuring. In the invention, the dewaxing agent I can be other liquid hydrocarbons capable of dewaxing, and the raw material entering the low-temperature separator can be condensate capable of dewaxing and discharged by other equipment.
In conclusion, the natural gas dewaxing device has the advantages of reasonable and compact structure and convenience in use, the natural gas low-temperature condensate and the liquid hydrocarbon extracted from the liquefied gas tower are used as the dewaxing agent, the waxy natural gas is dewaxed by utilizing the absorption and analysis principle, the waxy components in the natural gas can be reduced to zero after dewaxing, the wax blockage phenomenon of subsequent process equipment can be effectively avoided, and the natural gas dewaxing device has the characteristics of high dewaxing efficiency, low operation cost, strong adaptability, wide application range and flexibility in operation.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (5)
1. A natural gas dewaxing process which is characterised by being carried out as follows: firstly, wax-containing natural gas enters a feed gas filtering separator from a wax-containing natural gas pipeline to remove liquid drops with the diameter of more than 10 microns carried in the wax-containing natural gas, the liquid drops removed from the wax-containing natural gas are discharged from a liquid discharge pipeline of the filtering separator, and the wax-containing natural gas from which the liquid drops are removed enters a dewaxing absorption tower from a feed pipeline of the absorption tower; secondly, enabling a dewaxing agent I to enter a dewaxing absorption tower from a first dewaxing agent feeding pipeline, enabling waxy natural gas in the dewaxing absorption tower to reversely contact with the dewaxing agent I for dewaxing, discharging a waxy condensate obtained after dewaxing to a condensate flash tank from an absorption tower discharge pipeline, and enabling the dewaxed natural gas obtained after dewaxing to enter a tower top liquid remover from an absorption tower discharge pipeline; thirdly, removing liquid drops with the size of more than 10 microns in the dewaxed natural gas in a tower top liquid remover, discharging the liquid drops obtained in the tower top liquid remover through a liquid removing device liquid discharge pipeline, feeding the dewaxed natural gas with the liquid drops removed in the tower top liquid remover into a dehydration and dealkylation component through a liquid removing device gas discharge pipeline for cooling, discharging the cooled natural gas from a finished gas output pipeline, and feeding condensate obtained by cooling and condensing in the dehydration and dealkylation component into a low-temperature separator through a separator feed pipeline for gas-liquid separation; fourthly, the natural gas separated in the low-temperature separator returns to the dehydration and hydrocarbon removal assembly to recover cold energy and then is discharged by a finished gas output pipeline, 90 to 99 percent of the total mass of the condensate separated in the low-temperature separator enters a dewaxing absorption tower through a second dewaxing agent feeding pipeline to dewax the natural gas containing wax, and 1 to 10 percent of the total mass of the condensate separated in the low-temperature separator enters a condensate flash tank through a flash tank feeding pipeline; and fifthly, reversely contacting and dewaxing the natural gas separated by flash evaporation in the condensate flash tank and 1-10% of the total mass of the condensate separated in the low-temperature separator, feeding the dewaxed gas into the dehydration and dealkylation assembly from a flash tank exhaust pipeline, cooling, dehydrating and dealkylating again, and repeating the fourth step of operation, wherein the condensate separated in the condensate flash tank is discharged from a flash tank liquid discharge pipeline.
2. The natural gas dewaxing method of claim 1, wherein the first dewaxing agent is a liquid hydrocarbon and the condensate separated in the cryogenic separator is a second dewaxing agent.
3. An apparatus for carrying out a natural gas dewaxing method according to claim 1 or 2, comprising a raw gas filtering separator, a dewaxing absorption tower, a tower top liquid remover, a dehydration and dealkylation module, a low temperature separator and a condensate flash tank, wherein the inlet of the raw gas filtering separator is fixedly communicated with a wax-containing natural gas pipeline, an absorption tower feeding pipeline is fixedly communicated between the top outlet of the raw gas filtering separator and the lower inlet of the dewaxing absorption tower, a first dewaxing agent feeding pipeline is fixedly communicated with the middle inlet of the dewaxing absorption tower, an absorption tower exhaust pipeline is fixedly communicated between the top outlet of the dewaxing absorption tower and the middle inlet of the tower top liquid remover, a liquid remover exhaust pipeline is fixedly communicated between the top outlet of the tower top liquid remover and the upper inlet of the dehydration and dealkylation module, a finished gas outward conveying pipeline is fixedly communicated with the top outlet of the dehydration and dealkylation module, a separator exhaust pipeline is fixedly communicated between the upper inlet of the dehydration and the top outlet of the low temperature separator, a separator feeding pipeline is fixedly communicated between an outlet at the lower part of the dehydration and dealkylation assembly and an inlet at the middle part of the low-temperature separator, a second dewaxing agent feeding pipeline is fixedly communicated between an outlet at the bottom part of the low-temperature separator and an inlet at the upper part of the dewaxing absorption tower, a dewaxing absorption filler column is seated at an outlet at the top part of the condensate flash tank, a top outlet of the condensate flash tank is fixedly communicated with an inlet at the bottom part of the dewaxing absorption filler column, a flash tank vent pipeline is fixedly communicated between an inlet at the bottom part of the dehydration and dealkylation assembly and an outlet at the top part of the dewaxing absorption filler column, a flash tank feeding pipeline is fixedly communicated between an inlet at the top part of the dewaxing absorption filler column and the second dewaxing agent feeding pipeline, an absorption tower drainage pipeline is fixedly communicated between an inlet at the upper part of the condensate flash tank and an outlet at the bottom part of the dewaxing absorption tower, a liquid, a liquid discharge pipeline of the filtering separator is fixedly communicated between the bottom outlet of the raw material gas filtering separator and the liquid discharge pipeline of the flash tank.
4. The apparatus of claim 3, wherein a dewaxing agent feed pump is fixedly mounted to the first dewaxing agent feed line.
5. The apparatus according to claim 3 or 4, wherein a condensate booster pump is fixedly mounted on the second dewaxing agent feed line between the inlet of the flash tank feed line and the bottom outlet of the cryogenic separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010525522.9A CN111732982B (en) | 2020-06-10 | 2020-06-10 | Natural gas dewaxing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010525522.9A CN111732982B (en) | 2020-06-10 | 2020-06-10 | Natural gas dewaxing method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111732982A true CN111732982A (en) | 2020-10-02 |
| CN111732982B CN111732982B (en) | 2021-08-13 |
Family
ID=72648647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010525522.9A Active CN111732982B (en) | 2020-06-10 | 2020-06-10 | Natural gas dewaxing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111732982B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114874820A (en) * | 2022-06-27 | 2022-08-09 | 四川岚强石油天然气工程勘察设计有限责任公司 | Natural gas dewaxing system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773749A (en) * | 2010-03-01 | 2010-07-14 | 新疆石油学院 | Method for purifying polyol for preventing natural gas from freezing and dehydrating natural gas and equipment |
| CN102786995A (en) * | 2012-08-31 | 2012-11-21 | 常州大学 | Natural gas purifying device |
| WO2016005697A1 (en) * | 2014-07-08 | 2016-01-14 | Total Sa | Method and unit for separating the light and heavy components of natural gas |
| CN105779051A (en) * | 2016-03-08 | 2016-07-20 | 中国石油天然气股份有限公司 | Natural gas wax washing device and method |
| US20170368494A1 (en) * | 2015-01-27 | 2017-12-28 | Dow Global Technologies Llc | Separation of hydrocarbons using regenerable macroporous alkylene-bridged adsorbent |
| CN108913252A (en) * | 2018-09-14 | 2018-11-30 | 中国石油工程建设有限公司 | A kind of note hydrocarbon dewaxing device and technique taking off hydrocarbon suitable for content of wax gas dehydration |
-
2020
- 2020-06-10 CN CN202010525522.9A patent/CN111732982B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773749A (en) * | 2010-03-01 | 2010-07-14 | 新疆石油学院 | Method for purifying polyol for preventing natural gas from freezing and dehydrating natural gas and equipment |
| CN102786995A (en) * | 2012-08-31 | 2012-11-21 | 常州大学 | Natural gas purifying device |
| WO2016005697A1 (en) * | 2014-07-08 | 2016-01-14 | Total Sa | Method and unit for separating the light and heavy components of natural gas |
| US20170368494A1 (en) * | 2015-01-27 | 2017-12-28 | Dow Global Technologies Llc | Separation of hydrocarbons using regenerable macroporous alkylene-bridged adsorbent |
| CN105779051A (en) * | 2016-03-08 | 2016-07-20 | 中国石油天然气股份有限公司 | Natural gas wax washing device and method |
| CN108913252A (en) * | 2018-09-14 | 2018-11-30 | 中国石油工程建设有限公司 | A kind of note hydrocarbon dewaxing device and technique taking off hydrocarbon suitable for content of wax gas dehydration |
Non-Patent Citations (1)
| Title |
|---|
| 申雷昆: ""KS气田天然气处理工艺技术研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114874820A (en) * | 2022-06-27 | 2022-08-09 | 四川岚强石油天然气工程勘察设计有限责任公司 | Natural gas dewaxing system and method |
| CN114874820B (en) * | 2022-06-27 | 2023-06-23 | 四川岚强石油天然气工程勘察设计有限责任公司 | Natural gas dewaxing system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111732982B (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EA012227B1 (en) | Process and apparatus for removal of sour species from a natural gas stream | |
| CN101104825A (en) | Method for producing liquefied natural gas of mine gas | |
| CN107512702A (en) | Hydrogen production from coke oven gas technique | |
| CN104792117A (en) | Olefin polymer effluent gas recycling device and method in production | |
| CN111732982B (en) | Natural gas dewaxing method and device | |
| CN114017994B (en) | Process for purifying carbon dioxide from alcohol tail gas | |
| CN214735563U (en) | System for producing light hydrocarbon and LNG (liquefied Natural gas) from oilfield associated gas | |
| CN1952569A (en) | Process and equipment for liquefying air-containing coal-bed gas | |
| CN104560194B (en) | Refinery saturated dry gas recovery system and recovery method | |
| CN103773529B (en) | Pry-mounted associated gas liquefaction system | |
| CN206244740U (en) | Pipe natural gas heavy hydrocarbon removal unit | |
| CN105062545A (en) | Light hydrocarbon recovery method | |
| CN102634395A (en) | Process and system for purifying and refining coal-bed gas | |
| CN204952335U (en) | Vapor recovery system integrated system | |
| CN208356427U (en) | Fischer-Tropsch process exhaust purification device | |
| RU2175882C2 (en) | Method of treating hydrocarbon gas for transportation | |
| CN213113237U (en) | Natural gas dewaxing device | |
| CN112239390B (en) | Ethylene cryogenic recovery system | |
| CN112194550B (en) | Method and device for separating carbon-rich two-carbon three-dry gas | |
| CN108384594B (en) | Process and device for purifying Fischer-Tropsch synthesis tail gas and recovering light hydrocarbon | |
| CN113368663A (en) | Treatment method of Fischer-Tropsch synthesis decarbonized tail gas and equipment system for implementing method | |
| CN203904299U (en) | Pipeline natural gas heavy hydrocarbon removal unit | |
| CN112920007A (en) | Catalytic cracking gas separation process and device for producing high-concentration ethylene | |
| CN111238164A (en) | Intercooling separation device and process for catalytic cracking product gas | |
| CN210458013U (en) | Recovery system of ethylene in crude hydrogen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |