CN207394347U - A kind of recycling system of the residual gas of liquefied gas - Google Patents
A kind of recycling system of the residual gas of liquefied gas Download PDFInfo
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- CN207394347U CN207394347U CN201720167604.4U CN201720167604U CN207394347U CN 207394347 U CN207394347 U CN 207394347U CN 201720167604 U CN201720167604 U CN 201720167604U CN 207394347 U CN207394347 U CN 207394347U
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Abstract
The present embodiment provides a kind of recycling system of the residual gas of liquefied gas, including liquefaction system, compressor and heating system, wherein：Liquefaction system is connected with compressor by pipeline, and the residual gas that compressor excludes liquefaction system is compressed；Compressor is connected with heating system by pipeline, and heating system is used for coal liquefaction plant heat supply after compressed residual gas is burnt.The recycling system of the residual gas of liquefied gas is transported to heating system after not liquefied residual gas in liquefaction system is compressed by compressor, heating system is used for the heat supply of coal liquefaction plant after compressed residual gas is burnt.It avoids residual gas and is discharged into waste and environmental pollution caused by air.
Description
Technical field
The utility model is related to chemical technology field, more specifically to a kind of recycling profit of residual gas of liquefied gas
Use system.
Background technology
Natural gas is naturally mined fuel gas in gas field, is mainly made of methane.Liquefied gas be by
Gaseous natural gas is cooled to -162 DEG C under normal pressure, is allowed to condense into liquid.Accumulating sky can be greatlyd save after natural gas liquefaction
Between, and have the characteristics that calorific value is big, performance is high.Liquefied gas is a kind of cleaning, the efficient energy.Since liquefied gas inlet helps
Energy supply diversification, guarantee energy security are realized in energy-consuming state, and exporting liquefied gas contributes to natural gas producing nation to have
Effect exploitation natural gas resource increases foreign exchange earnings, promotes national economic development, thus liquefied gas trade just becomes global energy city
The new hot spot of field.
In the prior art, by long-distance transport pipes Lai natural gas, the natural gas after compressor boost, by liquefaction system
Output liquefied gas after processing, is finally stored in storage tank, is transported finally by Liquefied gas tanker.But in liquefaction system, meeting
There is portion of natural gas that can not be converted to liquid, this portion of natural gas is residual gas.At present, the residual gas generated in liquefaction system
Processing can only be vented.
The residual gas of generation is vented, huge waste can be generated, also can cause environmental pollution.
Utility model content
It in view of this, can the purpose of this utility model is to provide a kind of recycling system of the residual gas of liquefied gas
The heat supply of coal liquefaction plant is used for after the residual gas of liquefied gas is recycled, avoids waste caused by residual gas is discharged into air
And environmental pollution.
To achieve the above object, the utility model provides following technical solution：
A kind of recycling system of the residual gas of liquefied gas, including liquefaction system, compressor and heating system, wherein：
Liquefaction system is connected with compressor by pipeline, and the residual gas that compressor excludes liquefaction system is compressed；
Compressor is connected with heating system by pipeline, and heating system is used for liquefied gas after compressed residual gas is burnt
Factory's heat supply.
Preferably, after-treatment device is additionally included in, is connected in after-treatment device one end with compressor by pipeline, the other end
It is connected with heating system by pipeline, includes the first regulator in after-treatment device, the first regulator ensures that gas reaches
Heating system can be just sent to during certain pressure intensity.
Preferably, further include supplement switch, supplement switch one end be connected with gas distributing system by pipeline, the other end and
After-treatment device is connected by pipeline, and supplement switch, which is used to open to heating system during remaining unsaturated vapor upon compression, is passed through day
Right gas.
Preferably, storage tank and the second regulator are further included, wherein：
Second regulator one end is connected with storage tank by pipeline；
The second regulator other end is connected with compressor by pipeline；
Second regulator for pressure is excessive in storage tank when, by discharge flash steam form reduce storage tank internal pressure
By force.
Preferably, tank car is further included, tank car is connected with compressor by pipeline.
Preferably, further include the first check (non-return) valve, first check (non-return) valve one end is connected with liquefaction system by pipeline, the other end with
Compressor is connected by pipeline, and the first check (non-return) valve is located at the exit that liquefaction system leads to compressor, and the first non-return valve is used to prevent
Only gas in pipelines flows into liquefaction system.
Preferably, the second check (non-return) valve is further included, second check (non-return) valve one end is connected with tank car by pipeline, the other end and compression
Machine is connected by pipeline, and the second check (non-return) valve is located at the exit that tank car leads to compressor, and the second check (non-return) valve is used to prevent in pipeline
Gas flows into tank car.
Preferably, meter is further included in after-treatment device, meter is sent to the gas flow of heating system for recording.
Preferably, safety valve is further included in after-treatment device, safety valve is used for the discharge part gas when gas pressure intensity is excessive
Body.
Preferably, warning device is further included in after-treatment device, it is more than certain limit that warning device, which is used for when gas pressure intensity,
Alarm.
In conclusion the recycling system of the residual gas of liquefied gas provided in this embodiment will not liquefy in liquefaction system
Residual gas be compressed by compressor after be transported to heating system, heating system will be used for after the burning of compressed residual gas
The heat supply of coal liquefaction plant.It avoids residual gas and is discharged into waste and environmental pollution caused by air.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
As shown in Figure 1, it is a kind of embodiment 1 of the recycling system of the residual gas of liquefied gas disclosed in the utility model
Concrete structure schematic diagram；
As shown in Fig. 2, it is a kind of embodiment 2 of the recycling system of the residual gas of liquefied gas disclosed in the utility model
Concrete structure schematic diagram.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
The all other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, it is a kind of embodiment 1 of the recycling system of the residual gas of liquefied gas disclosed in the utility model
Concrete structure schematic diagram：
The system includes：Liquefaction system 101, compressor 102 and heating system 103.
Liquefaction system 101 is connected with compressor 102 by pipeline, and compressor 102 is connected with heating system 103 by pipeline
It connects.Liquefaction system 101 also has part day by output liquefied gas after natural gas processing, but during output liquefied gas
Right gas, which does not liquefy, becomes liquefied gas, this portion gas is residual gas.With increasing for residual gas, residual gas by pipeline from
Liquefaction system 101 flows into compressor 102.After residual gas enters compressor 102, residual gas is compressed (because residual by compressor 102
The concentration of residual air is relatively low, is not achieved using standard, it is therefore desirable to be compressed, improve its concentration), after compressor 102 will compress
Remaining pneumatic transmission to heating system 103.Because coal liquefaction plant originally just needs to heat, heating system 103 is by compressed remnants
The heat supply of coal liquefaction plant is used for after gas burning, residual gas is avoided and is discharged to waste and environmental pollution caused by air.At this
In embodiment, compressed gas can be also delivered to by compressor 103 in addition to compressed gas is delivered to heating system
The storage devices such as air accumulator, underground storehouse can also be delivered to thermal power plant, pipeline network of fuel gas in city etc. and compression can be used directly
The system of residual gas afterwards.
In conclusion the recycling system of the residual gas of liquefied gas provided in this embodiment by liquefaction system 101 not
Liquefied residual gas is transported to heating system 103 after being compressed by compressor 102, heating system 103 will be compressed residual
Residual air is burnt, and is coal liquefaction plant heat supply.It avoids residual gas and is discharged into waste and environmental pollution caused by air, simultaneously also
The cost of liquefied gas production is saved.
As shown in Fig. 2, it is a kind of embodiment 2 of the recycling system of the residual gas of liquefied gas disclosed in the utility model
Concrete structure schematic diagram：
The system includes：Liquefaction system 201, compressor 202, in after-treatment device and heating system 203.
Include the first regulator 209 in after-treatment device, liquefaction system 201 is connected with compressor 202 by pipeline, is pressed
Contracting machine 202 is connected with the first regulator 209 by pipeline, and the first regulator 209 is connected by pipeline and heating system 203
It connects.Liquefaction system 201 also has part day by output liquefied gas after natural gas processing, but during output liquefied gas
Right gas, which does not liquefy, becomes liquefied gas, this portion gas is residual gas.With increasing for residual gas, residual gas by pipeline from
Liquefaction system 201 flows into compressor 202.After residual gas enters compressor 202, residual gas is compressed (because residual by compressor 202
The concentration of residual air is relatively low, is not achieved using standard, it is therefore desirable to be compressed, improve its concentration), after compressor 202 will compress
Remaining pneumatic transmission to the first regulator 209, relief valve may be employed in the first regulator 209, and the first regulator 209 ensures
202 compressed residual gas of compressor must reach certain pressure intensity, after just being compressed when can be recycled by heating system 203
Residual gas be transported to heating system 203.First regulator 209 ensure that the normal work of heating system 203.Because of liquefied gas
Factory just needs to heat originally, and heating system 203 is used for the heat supply of coal liquefaction plant after compressed residual gas is burnt, avoid
Residual gas is discharged to waste and environmental pollution caused by air.In the present embodiment, compressor 202 is except by compressed gas
Body is delivered to outside heating system 203, can also compressed gas be delivered to the storage devices such as air accumulator, underground storehouse, also may be used
To be delivered to the system that compressed residual gas can be used directly in thermal power plant, pipeline network of fuel gas in city etc..
In conclusion the recycling system of the residual gas of liquefied gas provided in this embodiment by liquefaction system 201 not
Liquefied residual gas is transported to the first regulator 209 after being compressed by compressor 202, wanted when compressed gas reaches
When asking, gas reaches heating system 203 by the first regulator 209, and heating system 203 burns compressed residual gas,
For coal liquefaction plant heat supply.It avoids residual gas and is discharged into waste and environmental pollution caused by air, while also a save liquid
Change the cost of gas production.
Further to optimize this programme, the system further includes supplement switch 213, supplement 213 one end of switch and natural gas tube
Netcom's piping connection, the other end is connected in after-treatment device by pipeline, and when remaining unsaturated vapor, compressor 202 compresses
After residual gas, pressure is still insufficient in pipeline, and gas can not reach heating system 203 by the first regulator 209 after compression,
Heating system 203 can not just work normally, and supplement switch 213 is opened at this time, and natural gas flow flows to after the first regulator 209
Heating system 203 ensures that heating system 203 works normally.
Further to optimize this programme, the system further includes 204 and second regulator 205 of storage tank.Second regulator
205 one end are connected with storage tank 204 by pipeline；Second regulator, 205 other end is connected with compressor 202 by pipeline.Cause
Liquefied gas transport and storage temperature are -160 DEG C, influenced by ambient temperature and unload ship time volume change, are inevitably resulted from
A certain amount of flash steam.The appearance of these flash steams can cause temperature in storage tank 204 to rise, then internal pressure be caused to become larger,
If handled not in time, larger security risk can be caused.Relief valve may be employed in second regulator 205, the pressure in storage tank 204
When reaching certain pressure intensity by force, the second regulator 205 is started to work, and part flash steam is made to flow into compressor 202.Avoid storage tank
204 press the excessive generation security incident of pressure because of inside.
Further to optimize the present embodiment, the system further includes tank car 206, and tank car 206 is connected with compressor 202 by pipeline
It connects.While tank car 206 excludes liquefied natural gas, because of the reduction of internal pressure, partial liquefaction gas gasifies and remains in tank car 206
Interior formation residual gas.In next liquefied gas entrucking, these residual gas air be can be discharged into, waste and environmental pollution caused.
Residual gas in tank car 206 is passed through compressor 202 by the system, and compressor 202 is delivered to heating after residual gas is compressed
System 203 is recycled.It can avoid the waste of the residual gas in tank car 206 and pollution environment.
Further to optimize the system, the system further includes the first check (non-return) valve 207 and the second check (non-return) valve 208.First is non-return
207 one end of valve is connected with liquefaction system 201 by pipeline, and the other end is connected with compressor 202 by pipeline, the first check (non-return) valve
207 are located at the exit that liquefaction system 201 leads to compressor 202；Second check (non-return) valve, 208 one end is connected with tank car 206 by pipeline
It connects, the other end is connected with compressor 202 by pipeline, and the second check (non-return) valve 208 is located at the outlet that tank car 206 leads to compressor 202
Place.It is just excluded when because of the flash steam in storage tank 204, pressure reaches some strength in storage tank 204, pressure is likely to
The pressure of residual gas in liquefaction system 201 and tank car 206 can be more than.Flash steam flows into tank car 206 and liquefaction system in order to prevent
201, the first check (non-return) valve 207 is installed in the exit that compressor 202 is led in liquefaction system 201, is installed in the exit of tank car 206
Second check (non-return) valve 208 can avoid flash steam adverse current from entering liquefaction system 201 and tank car 206.
Further to optimize the system, meter 210 is further included in after-treatment device, meter 210 is recordable to be sent to
The gas flow of heating system 203.Make working condition of the staff convenient for assessment the system, convenient for using compressed remnants
The user of gas and flash steam charges.
Further to optimize the system, safety valve 211 is further included in after-treatment device, is broken down when in after-treatment device
Or when can not timely use compressed residual gas and flash steam, internal pressure can increase, when pressure increases to some strength
When, safety valve 211 works, discharge part gas, ensures the safety of whole system.
Further to optimize the system, warning device 212 is further included in after-treatment device, police can be used in warning device 212
Bell.When after-treatment device pressure is more than some strength or other failures occurs, warning device 212 is alarmed, and makes work
Personnel can discharge failure with on-call maintenance, ensure safety.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with it is other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications of these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (10)
1. a kind of recycling system of the residual gas of liquefied gas, which is characterized in that including liquefaction system, compressor and heating system
System, wherein：
The liquefaction system is connected with the compressor by pipeline, the residual gas that the compressor excludes the liquefaction system
Compression；
The compressor is connected with the heating system by pipeline, and the heating system is used after compressed residual gas is burnt
In coal liquefaction plant heat supply.
2. the system as claimed in claim 1, which is characterized in that after-treatment device is additionally included in, it is described in after-treatment device one
End is connected with the compressor by pipeline, and the other end is connected with the heating system by pipeline, described in after-treatment device
Including the first regulator, first regulator ensures just be sent to heating system when gas reaches certain pressure intensity.
3. system as claimed in claim 2, which is characterized in that further include supplement switch, described supplement switch one end with it is natural
Gas pipe network is connected by pipeline, and the other end is connected with described in after-treatment device by pipeline, and the supplement switchs pressing
It is opened during remaining unsaturated vapor after contracting to heating system and is passed through natural gas.
4. system as claimed in claim 3, which is characterized in that storage tank and the second regulator are further included, wherein：
Described second regulator one end is connected with the storage tank by pipeline；
The second regulator other end is connected with the compressor by pipeline；
Second regulator is for when pressure is excessive in the storage tank, the storage to be reduced by the form for discharging flash steam
Pressure in tank.
5. system as claimed in claim 4, which is characterized in that further include tank car, the tank car passes through pipe with the compressor
Road connects.
6. system as claimed in claim 5, which is characterized in that further include the first check (non-return) valve, described first check (non-return) valve one end with
The liquefaction system is connected by pipeline, and the other end is connected with the compressor by pipeline, and first check (non-return) valve is located at institute
The exit that liquefaction system leads to the compressor is stated, first non-return valve is used to prevent gas in pipelines from flowing into the liquefaction
System.
7. system as claimed in claim 6, which is characterized in that further include the second check (non-return) valve, described second check (non-return) valve one end with
The tank car is connected by pipeline, and the other end is connected with the compressor by pipeline, and second check (non-return) valve is located at the tank
Vehicle leads to the exit of the compressor, and second check (non-return) valve is used to prevent gas in pipelines from flowing into the tank car.
8. system as claimed in claim 7, which is characterized in that described to further include meter, the metering in after-treatment device
Device is sent to the gas flow of heating system for recording.
9. system as claimed in claim 8, which is characterized in that described to further include safety valve, the safety in after-treatment device
Valve is used for the discharge part gas when gas pressure intensity is excessive.
10. system as claimed in claim 9, which is characterized in that described to further include warning device, the report in after-treatment device
It is more than certain limit alarm that alarm device, which is used for when gas pressure intensity,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720167604.4U CN207394347U (en) | 2017-02-23 | 2017-02-23 | A kind of recycling system of the residual gas of liquefied gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720167604.4U CN207394347U (en) | 2017-02-23 | 2017-02-23 | A kind of recycling system of the residual gas of liquefied gas |
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| Publication Number | Publication Date |
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| CN207394347U true CN207394347U (en) | 2018-05-22 |
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ID=62401489
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| CN201720167604.4U Active CN207394347U (en) | 2017-02-23 | 2017-02-23 | A kind of recycling system of the residual gas of liquefied gas |
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