CN208578552U - Injection drainage system based on high sulphur wet natural gas transmission & distribution - Google Patents
Injection drainage system based on high sulphur wet natural gas transmission & distribution Download PDFInfo
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- CN208578552U CN208578552U CN201820688603.9U CN201820688603U CN208578552U CN 208578552 U CN208578552 U CN 208578552U CN 201820688603 U CN201820688603 U CN 201820688603U CN 208578552 U CN208578552 U CN 208578552U
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Abstract
The utility model belongs to gas gathering and transportation technical field, and in particular to a kind of injection drainage system based on high sulphur wet natural gas transmission & distribution.Injection drainage system based on high sulphur wet natural gas transmission & distribution, including sequentially connected heating device, injector, collection transmission pipe network, Ji Shu master station and purification plant, Ji Shu master station connects sewage treatment re-injection device, heating device is connect by pipeline with high pressure gas recovery well, injector is directly connect with low pressure gas recovery well by pipeline, and molten sulphur agent injection branch, hydrate inhibitor injection branch and corrosion inhibiter injection branch are disposed on the pipeline connected from high pressure gas recovery well to heating device；Injector is connect with collection transmission pipe network by pipeline, and hydrate inhibitor injection branch and corrosion inhibiter injection branch are disposed on the pipeline connected from injector to collection transmission pipe network.The utility model utilizes high-pressure natural gas injection low pressure natural gas, to have the function that promote low pressure natural gas pressure, reduces the power consumption of liter process.
Description
Technical field
The utility model belongs to gas gathering and transportation technical field, and in particular to a kind of based on high sulphur wet natural gas transmission & distribution
Spray drainage system.
Background technique
Gas field surface gathering system as connection well head and purification plant tie, carry gas well heating, throttling, metering,
The important tasks such as gas-liquid conveying, gas-liquid separation and sewage treatment.Foreign natural gas gathering and transportation technology mainly has dry gas collection defeated and wet at present
Defeated two kinds of gas collection.Dry gas collection is defeated to refer to that inside gas field, (gas gathering station near gas well) builds dehydration device, and each well carrys out gas in gas well
Purification plant is transported to by collection transmission pipe network after gas-liquid separation, dehydration, metering in neighbouring gas gathering station and carries out desulfurization process；Moisture collection
Gas-liquid separation and dehydration device are not set in the defeated gas gathering station referred near gas well, the natural gas from gas well adds in gas gathering station
Then heat, throttling are delivered to gas collection master station by collection transmission pipe network, separate in gas collection master station to gas-liquid to defeated pressure is collected,
It is delivered to purification plant and carries out deep dehydration and desulfurization process.
Compared with dry gas conveying, using moisture conveying technique, the facilities such as well site and gas gathering station, pipe network are relatively easy, gas collection
Without production separator in standing, sewage dispersion can be effectively solved, the problems such as processing and maintenance cost are high.In view of defeated excellent of moisture collection
Point, based on domestic and international more regions mainly conveys high sulfur Gas Fields with moisture, supplemented by dry gas conveying.Fig. 1 is certain high sour gas
The moisture gathering and transferring process system diagram in field, main working process are as follows: each gas well carrys out unstripped gas after well head carries out level-one throttling, will
Pressure is down to 19~28MPa by 40MPa, and temperature is reduced to 40~55 DEG C, then transports at water batch heater.Natural gas carries out herein
Two-stage throttling and two-step heating, raw gas pressure is down to 9.75MPa by 19~28MPa, finally by heated by natural gas to 50~
Enter manifold after 55 DEG C, individual well comes after turbine flow separation, metering to carry out gas with remaining each gas well to converge, and enters collection after carrying out total amount
Defeated pipe network transports to gas collection master station, to transport to after gas summarizes metering by several line collection transmission pipe networks after gas collection master station isolates liquid water
Purification plant is further processed.
For prevent natural gas formed in the gas gathering station treatment process (mainly dehydration device upstream portion) hydrate and
Corroded pipeline, level-one throttling after and natural gas enter collection transmission pipe network before filled hydrate inhibitor, after two-step throttle
Corrosion inhibiter has been filled before entering collection transmission pipe network with natural gas.
If Fig. 6 in Detailed description of the invention is suitable for gas field development initial stage and stable production period, the pressure of this period gas well is high, passes through
Being throttled to certain pressure makes natural gas enter distributing system.But with the lasting exploitation in gas field, well head pressure is gradually decreased, especially
It is part stripper well, pressure decline faster, is not able to satisfy the requirement of distributing system downstream natural gas purification processing, thus, in gas
Well pressure drops to must carry out pressurization transmission & distribution to a certain degree.For this purpose, both at home and abroad generally using compressor to low pressure natural gas into
Row pressurization, is delivered to down-stream system using transmission and distribution network.But it is either external or domestic at present, although detailed process is not to the utmost
It is identical, but common feature is conveyed after being pressurized low pressure natural gas using compressor, compressor power consumption increases transmission & distribution energy
Consumption, higher cost, compressor boost is clearly not energy-efficient uneconomic scheme, as shown in Figure 7.
Fig. 6 and Fig. 7 is existing gas conveying system main flow schematic diagram.The pressure energy of Fig. 7 high-pressure natural gas is logical
Crossing throttling set lost, and low pressure natural gas needs to pass through compressor boost since pressure is lower than discharge pressure, it is clear that needs
Consume electric energy.
Natural gas injection drainage technology is to improve low-pressure gas well pressure using the energy of high-pressure gas well, is realizing low-pressure gas well just
Normal steady production solves the uneconomical not energy-efficient drawback of compressor boost.Natural gas injector is natural gas injection drainage skill
The core component of art, it is a kind of device using high pressure gas injection low-pressure gas.This device can increase low-pressure gas pressure
Power and so that it is met outer defeated requirement, realize that low-pressure gas well continues the purpose of exploitation, but also have simple and convenient, work can
It leans on, the advantages that comprehensive benefit is high.For the gas field of many high sulfur-containing natural gas, high sulfur-containing natural gas flows in injector
When, pressure and temperature is first reduced and is increased again, and natural gas is likely to occur gas hydrates in injector flow process and sulphur is heavy
Product causes blocking to make injector that can not work.
Summary of the invention
The purpose of this utility model is that providing aiming at the problems existing in the prior art a kind of wet natural based on high sulfur-bearing
The injection drainage system of gas transmission & distribution keeps high sulphur wet natural gas natural by not formed after pretreatment unit when passing through injector
Gas hydrate, and not in the case where the precipitation of sulphur, using high-pressure natural gas injection low pressure natural gas, to reach promotion low pressure
The effect of gas pressure reduces the power consumption of boost process.
The technical solution of the utility model is:
Based on the injection drainage system of high sulphur wet natural gas transmission & distribution, including it is sequentially connected heating device, injector, defeated
Pipe network, transmission & distribution master station and purification plant, the transmission & distribution master station connect sewage treatment re-injection device, and the heating device passes through
Pipeline is connect with high pressure gas recovery well, and injector is directly connect with low pressure gas recovery well by pipeline, is filled from high pressure gas recovery well to heating
It sets and is disposed with molten sulphur agent injection branch, hydrate inhibitor injection branch and corrosion inhibiter injection branch on the pipeline of connection；
The injector is connect with transmission and distribution network by pipeline, is disposed with water on the pipeline connected from injector to transmission and distribution network
Compound inhibitors injection branch and corrosion inhibiter injection branch.
Specifically, low pressure natural gas is arranged on the pipeline that the low pressure gas recovery well is connect with injector introduces branch.
Specifically, high-pressure natural gas is arranged on the pipeline that the high pressure gas recovery well is connect with heating device introduces branch.
Specifically, the injector includes the high pressure gas entrance for being located at case nose, the internal diameter of high pressure gas entrance is by preceding
It gradually becomes smaller backward, the end of high pressure gas entrance is nozzle, and toroidal cavity, the side wall of outer shell at toroidal cavity are equipped with around nozzle
Equipped with low pressure gas entrance, toroidal cavity rear end is mixing chamber, and the internal diameter of mixing chamber becomes larger from front to back, and mixing cavity rear end is
Diffuser, diffuser rearmost end are outlet, and the high pressure gas entrance is connect with heating device, low pressure gas entrance and low pressure gas production
Well connection, outlet are connect with transmission and distribution network.
Specifically, the injection drainage system further includes compressor, the compressor passes through pipeline for low pressure gas production
Well is connect with transmission and distribution network.
Specifically, the injection drainage system further includes compressor, the compressor is set to injection by pipeline
Between device and transmission and distribution network.
The beneficial effects of the utility model are: 1. injectors make high-pressure natural gas injection low pressure natural gas, to be promoted low
Gas pressure is pressed, low-pressure gas pressure can be increased and it is made to meet outer defeated requirement, realizes that low-pressure gas well continues the mesh of exploitation
's；2. the addition of heating device and hydrate inhibitor injection branch can prevent natural gas in injection and gas gathering station treatment process
Middle formation hydrate；Branch and heating device is added in sulphur inhibitor injection branch or molten sulphur agent, natural gas can be prevented in injection and
The precipitation of sulphur in gas gathering station treatment process；3. practical.Injector provided by the utility model is mainly by jet pipe, mixing chamber
It is formed with diffuser three parts, ejector structure is simple, no-rotary part, service life are long, reliable for operation.
The utility model makes high sulphur wet natural gas by not forming gas water when passing through injector after pretreatment unit
Object is closed, and not in the case where the precipitation of sulphur, using high-pressure natural gas injection low pressure natural gas, so that it is natural to reach promotion low pressure
The effect of atmospheric pressure reduces the power consumption of boost process.
Detailed description of the invention
Fig. 1 is the system flow structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of embodiment 1；
Fig. 3 is the structural schematic diagram of embodiment 2；
Fig. 4 is high-pressure natural gas injection low pressure natural gas schematic diagram；
Fig. 5 is the structural schematic diagram of injector；
Fig. 6 is typical high term moisture distributing system flow chart existing in the prior art；
Fig. 7 is underproduction phase moisture distributing system flow chart.
1 injector, 1-1 high pressure gas entrance, 1-2 nozzle, 1-3 toroidal cavity, 1-4 low pressure gas entrance,
1-5 diffuser, 1-6 mixing chamber, wherein D refers to that high pressure passes through, and A refers to that low pressure well, B refer to that low pressure well, C are
Low pressure well.
Specific embodiment
It is as shown in Figure 1 the flowage structure schematic diagram of the injection drainage system based on high sulphur wet natural gas transmission & distribution, including
Sequentially connected heating device, injector 1, transmission and distribution network, transmission & distribution master station and purification plant, the transmission & distribution master station connect at sewage
Re-injection device is managed, the heating device is connect by pipeline with high pressure gas recovery well, and injector 1 directly passes through with low pressure gas recovery well
Pipeline connects, and molten sulphur agent injection branch, hydrate suppression are disposed on the pipeline connected from high pressure gas recovery well to heating device
Preparation injection branch and corrosion inhibiter injection branch；The injector 1 is connect with transmission and distribution network by pipeline, from injector 1 to
Hydrate inhibitor injection branch and corrosion inhibiter injection branch are disposed on the pipeline of transmission and distribution network connection.The low pressure
Low pressure natural gas is set on the pipeline that gas recovery well is connect with injector 1 and introduces branch.The high pressure gas recovery well and heating device
High-pressure natural gas is set on the pipeline of connection and introduces branch.High-pressure natural gas injection low pressure natural gas schematic diagram is as shown in Figure 4.
The structural schematic diagram of the injector 1 is as shown in figure 5, include the high pressure gas entrance 1-1 for being located at case nose, height
The internal diameter of pressure port 1-1 gradually becomes smaller from front to back, and the end of high pressure gas entrance 1-1 is nozzle 1-2, sets around nozzle 1-2
There is toroidal cavity 1-3, the side wall of outer shell at toroidal cavity 1-3 is equipped with low pressure gas entrance 1-4, and the rear end toroidal cavity 1-3 is mixing
The internal diameter of chamber 1-6, mixing chamber 1-6 become larger from front to back, and the rear end mixing chamber 1-6 is diffuser 1-5, and diffuser 1-5 is last
End is outlet, and the high pressure gas entrance 1-1 is connect with heating device, and low pressure gas entrance 1-4 is connect with low pressure gas recovery well, outlet
It is connect with transmission and distribution network.
The utility model improves traditional system, increases an injector and sulphur inhibitor injection branch, deactivates
The throttling set of traditional high-pressure natural gas, i.e. high-pressure well mouth one nuclear one-stage throttling device, natural gas two-step throttle dress on Fig. 6
It sets, three nuclear one-stage throttling device of natural gas；Compressor can even be deactivated.The utility model will be made from the natural gas of high pressure gas recovery well
For the working media of injector, high-pressure natural gas enters injector, and by nozzle adiabatic expansion, pressure energy is converted into kinetic energy, shape
At high-speed jet, localized low-pressure zone is caused in jet expansion, the natural gas from low pressure gas recovery well is made to enter mixing by injection
In chamber venturi, progress speed is balanced with energy, and the kinetic energy of mixed gas is converted to pressure energy again through diffuser effect,
The pressure of diffuser outlet, mixed gas is higher than low pressure natural gas pressure, to complete fluid pressurized effect.System benefit
Transmission & distribution cost is reduced to reduce the investment of compressor electric energy with high-pressure natural gas injection low pressure natural gas.
Embodiment 1
The injection drainage system that this specific embodiment provides retains the compressor of original system, and the compressor passes through pipe
Low pressure gas recovery well is connect by road with transmission and distribution network.As shown in Figure 2.The heating device of gas ejector one end and high-pressure natural gas
And the low pressure natural gas connection that low pressure gas recovery well comes, the other end are connect with transmission and distribution network.If low pressure natural gas amount is big, injection
Device 1 can only a part of low pressure natural gas of injection, remaining low pressure natural gas also need after compressor boost enter transmission & distribution system
System.
Embodiment 2
The compressor in injection drainage system that this specific embodiment provides is set to injector and transmission & distribution pipe by pipeline
Between net.In the downstream connection compressor 16 of injector 17, compressor downstream connection transmission and distribution network 10.As shown in Figure 3.If through height
The mixed pressure of low pressure natural gas of pressure prevention of natural gas ejected is unsatisfactory for distributing system operating pressure, then mixed pressure rise
Gas enter back into and enter transmission and distribution network after compressor boost, improve compressor inlet pressure, save compressor power consumption,
Reduce energy consumption.
The injection drainage system of natural gas transmission and distribution shown in FIG. 1 recycles the pressure of high-pressure natural gas using injector 1
Can, so that low pressure natural gas is pressurized to discharge pressure, directly deactivated compressor, saves the power consumption of compressor.If low pressure is natural
It is large-minded, then injector 1 can only a part of low pressure natural gas of injection, as shown in Fig. 2, remaining low pressure natural gas also need through
Enter distributing system after the pressurization of overcompression machine, because of the low pressure natural gas flow-reduction of compressor compresses, it is clear that reduce compression
The power consumption of machine.If gas pressure after injection is lower to cannot directly enter transmission and distribution network, increase pressure in the downstream of injector 1
Contracting machine, compressor inlet pressure improve, and outlet pressure is constant, it is clear that reduces the power consumption of compressor.Using Fig. 1 and Fig. 2, Fig. 3
High sulfur-containing natural gas transmission & distribution injection drainage system, under conditions of there is not gas hydrates and sulphur and depositing, recycling benefit
With the pressure energy of high-pressure gas well, the pressure energy of low-pressure gas well natural gas is promoted, the power consumption of compressor, the energy of distributing system are reduced
Consumption reduces, and energy-saving effect is significant.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (6)
1. based on the injection drainage system of high sulphur wet natural gas transmission & distribution, including sequentially connected heating device, injector (1),
Collection transmission pipe network, Ji Shu master station and purification plant, the Ji Shu master station connect sewage treatment re-injection device, which is characterized in that described
Heating device connect with high pressure gas recovery well by pipeline, injector (1) is directly connect with low pressure gas recovery well by pipeline, from height
Be disposed on the pipeline that is connected to heating device of pressure gas recovery well molten sulphur agent injection branch, hydrate inhibitor injection branch and
Corrosion inhibiter injection branch；The injector (1) is connect with collection transmission pipe network by pipeline, is connected from injector (1) to collection transmission pipe network
Hydrate inhibitor injection branch and corrosion inhibiter injection branch are disposed on the pipeline connect.
2. the injection drainage system according to claim 1 based on high sulphur wet natural gas transmission & distribution, which is characterized in that described
Low pressure natural gas is set on the pipeline that low pressure gas recovery well is connect with injector (1) and introduces branch.
3. the injection drainage system according to claim 1 based on high sulphur wet natural gas transmission & distribution, which is characterized in that described
High-pressure natural gas is set on the pipeline that high pressure gas recovery well is connect with heating device and introduces branch.
4. the injection drainage system according to claim 1 based on high sulphur wet natural gas transmission & distribution, which is characterized in that described
Injector (1) includes the high pressure gas entrance (1-1) for being located at case nose, and the internal diameter of high pressure gas entrance (1-1) is from front to back gradually
Become smaller, the end of high pressure gas entrance (1-1) is nozzle (1-2), is equipped with toroidal cavity (1-3) around nozzle (1-2), toroidal cavity
Side wall of outer shell at (1-3) is equipped with low pressure gas entrance (1-4), and the toroidal cavity rear end (1-3) is mixing chamber (1-6), mixing chamber (1-
6) internal diameter becomes larger from front to back, and the mixing chamber rear end (1-6) is diffuser (1-5), and diffuser (1-5) rearmost end is
Mouthful, the high pressure gas entrance (1-1) connect with heating device, and low pressure gas entrance (1-4) is connect with low pressure gas recovery well, export and
Collection transmission pipe network connection.
5. the injection drainage system according to claim 1 based on high sulphur wet natural gas transmission & distribution, which is characterized in that described
Spraying drainage system further includes compressor, and low pressure gas recovery well is connect by the compressor by pipeline with collection transmission pipe network.
6. the injection drainage system according to claim 1 based on high sulphur wet natural gas transmission & distribution, which is characterized in that described
Spraying drainage system further includes compressor, and the compressor is set between injector (1) and collection transmission pipe network by pipeline.
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| CN201820688603.9U CN208578552U (en) | 2018-05-10 | 2018-05-10 | Injection drainage system based on high sulphur wet natural gas transmission & distribution |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982563A (en) * | 2019-11-30 | 2020-04-10 | 翟常忠 | Efficient crude oil natural gas hydrogen sulfide removal device and hydrogen sulfide removal method thereof |
| CN111173484A (en) * | 2019-12-06 | 2020-05-19 | 森诺科技有限公司 | Energy circulating device for gas field gas collection pressurizing station |
| CN111649237A (en) * | 2020-01-16 | 2020-09-11 | 中石化中原石油工程设计有限公司 | Ground gathering and transporting system for exhausted gas reservoir |
-
2018
- 2018-05-10 CN CN201820688603.9U patent/CN208578552U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982563A (en) * | 2019-11-30 | 2020-04-10 | 翟常忠 | Efficient crude oil natural gas hydrogen sulfide removal device and hydrogen sulfide removal method thereof |
| CN110982563B (en) * | 2019-11-30 | 2021-05-28 | 翟常忠 | Efficient crude oil natural gas hydrogen sulfide removal device and hydrogen sulfide removal method thereof |
| CN111173484A (en) * | 2019-12-06 | 2020-05-19 | 森诺科技有限公司 | Energy circulating device for gas field gas collection pressurizing station |
| CN111173484B (en) * | 2019-12-06 | 2024-01-12 | 森诺科技有限公司 | Gas field gas collection booster station energy circulating device |
| CN111649237A (en) * | 2020-01-16 | 2020-09-11 | 中石化中原石油工程设计有限公司 | Ground gathering and transporting system for exhausted gas reservoir |
| CN111649237B (en) * | 2020-01-16 | 2021-11-26 | 中石化中原石油工程设计有限公司 | Ground gathering and transporting system for exhausted gas reservoir |
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