CN206827673U - CNG discharge apparatus - Google Patents

CNG discharge apparatus Download PDF

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Publication number
CN206827673U
CN206827673U CN201720511335.9U CN201720511335U CN206827673U CN 206827673 U CN206827673 U CN 206827673U CN 201720511335 U CN201720511335 U CN 201720511335U CN 206827673 U CN206827673 U CN 206827673U
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China
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pressure
cng
high pressure
supercharger
utility
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CN201720511335.9U
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Chinese (zh)
Inventor
于风杰
王荧光
徐东旭
李文明
郭玉环
张俊
姜波
黄涛
李哲
李谦
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CNPC Liaohe Engineering Co Ltd
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CNPC Liaohe Engineering Co Ltd
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Abstract

The utility model belongs to CNG storaging and transport technologies field, more particularly, to a kind of CNG discharge apparatus, it is characterized in that including pressure classification equipment, the high pressure gas ejecting supercharger being connected with this pressure classification equipment, the rear pressure adjustment equipment being connected respectively with the pressure classification equipment and high pressure gas ejecting supercharger.The utility model is that high pressure injection technology is unloaded process applied to CNG, a kind of new type auto unloading unit of design;The utility model is realized without can be by the near 1.0MPa of operating pressure in-car CNG by compressor, it is even lower, need not be by supercharging equipment, effectively utilize CNG tank car high-pressure energies, it can realize that low pressure gas is discharged into middle pressure pipeline, reduce throttle effect simultaneously, reduce heater power, reduce energy consumption.

Description

CNG discharge apparatus
Technical field
The utility model belongs to CNG storaging and transport technologies field, more particularly, to a kind of CNG discharge apparatus.
Background technology
CNG (Compressed Natural Gas), i.e. compressed natural gas, be natural gas pressurization (more than 3,600 pounds/it is flat Square inch) and stored in a reservoir with gaseous state.At present, design pressure 25MPa CNG tank cars should in compressed natural gas accumulating field With extensive, but many problems during unloading be present.First, chock pressure difference is big, and temperature drop is larger, easy frozen block, causes CNG to unload The car time is grown;Secondly, when being discharged into middle pressure pipeline, because the pressure of end is higher (1.6~4.0MPa), can not be unloaded in CNG tank cars What is gone out is large-minded, it is necessary to using pipeline is entered back into after compressor boost, otherwise because in-car has portion of natural gas, causes CNG The freight volume of tank car tails off.
The content of the invention
The purpose of this utility model is to provide a kind of CNG discharge apparatus, and the pressure that high pressure CNG tank cars are discharged into pipeline is During middle pressure (1.6~4.0MPa), the pressure of unloading in CNG tank cars can be down to by 0.4~1.0MPa by the present apparatus, it is not necessary to By supercharging equipment, CNG tank car high-pressure energies effectively are utilized, can realize that low pressure gas is discharged into middle pressure pipeline, while reduce throttling Effect, heater power is reduced, reduce energy consumption.
CNG discharge apparatus of the present utility model, it is characterised in that including pressure classification equipment, set with this pressure classification The standby high pressure gas ejecting supercharger being connected, after being connected respectively with the pressure classification equipment and high pressure gas ejecting supercharger Press adjustment equipment,
Described pressure classification equipment includes one group of connecting pipe, is separately positioned on the height of one group of connecting pipe end Press header, middle pressure header and low pressure header, the three-way valve I being separately positioned on the connecting pipe, three-way valve II, with institute The high-pressure heater that high pressure header is connected is stated, the middle pressure heater being connected with medium pressure header,
Described rear pressure adjustment equipment includes the pressure regulating valve I that is connected with the high pressure gas ejecting supercharger, and described The pressure regulating valve II that middle pressure heater is connected.
One group of described connecting pipe is connected with multiple gas interfaces that unload.
The advantages of the utility model:
CNG discharge apparatus of the present utility model is that high pressure injection technology is unloaded process applied to CNG, the one of design The new type auto unloading unit of kind;The utility model is realized without can be near by the in-car operating pressures of CNG by compressor 1.0MPa, even lower (during middle pressure pipeline pressure as little as 1.6MPa, can as little as 0.4MPa), has following remarkable advantage:
Advantage one:Compressor apparatus can be reduced and reduce heater power, so as to effectively reduce construction investment;
Advantage two:By it is original it is compressor converted be ejecting supercharger, dynamic equipment is changed to static equipment, and maintenance cost significantly drops Low, operation element amount also greatly reduces;
Advantage three:Gas pressure energy, non-pollutant discharge are made full use of, energy consumption is greatly decreased, and environmental benefit is good;
Advantage four:The utility model is simple in construction, skid can be achieved, before being widely used in natural gas accumulating field Scape.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model high pressure gas injection pressurizing processes modeling process chart.
Fig. 3 is that the utility model high pressure atmospheric pressure converges rear pressure history with injection.
Fig. 4 for the utility model institute injection low pressure gas flow changing curve.
Fig. 5 is the utility model injection rate change curve.
Embodiment
Specific embodiment of the present utility model is further illustrated below in conjunction with the accompanying drawings.
As shown in Fig. 1,2,3,4 and 5, CNG discharge apparatus of the present utility model, it is characterised in that including pressure classification Equipment, the high pressure gas ejecting supercharger 7 being connected with this pressure classification equipment, respectively with the pressure classification equipment and high pressure gas The rear pressure adjustment equipment that ejecting supercharger 7 is connected,
Described pressure classification equipment includes one group of connecting pipe, is separately positioned on the height of one group of connecting pipe end Press header 3, middle pressure header 4 and low pressure header 5, the three-way valve I 1 being separately positioned on the connecting pipe, three-way valve II 2, the high-pressure heater 6 being connected with the high pressure header 3, the middle pressure heater 9 being connected with medium pressure header 4,
Described rear pressure adjustment equipment includes the pressure regulating valve I 8 being connected with the high pressure gas ejecting supercharger 7, with institute State the pressure regulating valve II 10 that middle pressure heater 9 is connected.
One group of described connecting pipe is connected with multiple gas interfaces that unload.
The utility model unloads high pressure injection technology process applied to CNG, CNG tank cars during unloading, pressure by 20MPa is gradually reduced, and early stage, pressure was higher, has higher pressure energy to utilize, and passes through high pressure injection technology, high-pressure natural gas Low pressure gas supercharging in CNG tank cars can be entered downstream, the natural gas of in-car can be drawn off as far as possible, simultaneously because high-low pressure The mixing of gas, throttle effect substantially reduce, and the risk that frozen block occurs also decreases, and the heater power before throttling can also Reduce.
The front end connection discharge column of CNG discharge apparatus of the present utility model, rear end connection will be discharged into pipeline.Unload gas When, CNG tank cars connect discharge column by snap joint, and CNG is discharged into connecting pipe by discharge column and discharge apparatus.CNG Discharge apparatus can be arranged as required to it is multiple unload gas interface, while multiple discharge columns can be connected.CNG unloads dress automatically Put, mainly include pressure classification equipment, high pressure gas ejecting supercharger 7 and rear pressure adjustment device;With pressure pipeline pressure in downstream Exemplified by 4.0MPa, pressure classification equipment can be divided into 3 pressure ratings, including high pressure section 13MPa~25MPa, intermediate pressure section 5.0MPa~13MPa and low pressure stage 1.0MPa~5MPa, in fig. 1 mainly by three-way valve I 1 and three-way valve II 2 two Stress control three-way valve realizes pressure classification, is imported into high pressure header 3, middle pressure header 4 and low pressure header 5 respectively;High pressure gas Ejecting supercharger 7 is the nucleus equipment of the present apparatus, and the gas of high pressure header 3 drives low pressure header by high pressure gas ejecting supercharger 7 5 carry out gas supercharging, and high pressure gas ejecting supercharger 7 is worked off one's feeling vent one's spleen by the natural gas after the pressure regulation of pressure regulating valve I 8 with middle pressure header 4 come gas Natural gas after the pressure regulation of pressure regulating valve II 10, which converges, to be entered and device connecting pipe.
High pressure gas injection supercharging technology is the core technology of the present apparatus, and the high pressure gas injection is pressurized by HYSYS softwares Part carries out processing simulation, flow chart such as accompanying drawing 2, is converged using high compression swelling, low pressure compression and gas and is set instead of injection supercharging It is standby.Simulated by Fig. 2, the pressure of high pressure gas changes to 20MPa by 13MPa, and flow is 3000m3/h, and low pressure atmospheric pressure is 1.0MPa, flow 800m3/h, calculate change curve such as accompanying drawing 3.It can be seen that converge atmospheric pressure after injection supercharging and be 4.46MPa~5.25MPa, pressure pipeline in can entering.
Test data shows:Be 8MPa~13Mpa in high pressure gas admission pressure, low pressure gas admission pressure be 2.0MPa~ In 5.0MPa parameter area, the low pressure gas flow of institute's injection is up to 4.7 × 104m3/d, and injection rate is up to 100%, Fig. 4 and figure 5 when sets forth different high pressure gas and low pressure gas parameters, the low pressure gas flow of institute's injection and the change curve of injection rate, in figure PH represents high pressure atmospheric pressure, and PL represents low pressure well atmospheric pressure.
The high pressure supercharging power resources of CNG discharge apparatus are realized in the pressure energy of the early stage of unloading of CNG tank cars The device is unloaded automatically, it is necessary to assure two CNG tank cars having times are poor to unload.After CNG tank cars access unloading system, work as in-car When pressure is higher than 13MPa, natural gas passes through the injection low pressure natural gas of high pressure header 3, then enters pipeline by pressure regulation;With tube bank Interior natural gas is constantly reduced, and for interior pressure in 5.0MPa~13MPa scopes, natural gas is after middle pressure header 4 and pressure regulation Into pipeline;In 1.0MPa~5.0MPa scopes, natural gas enters high pressure gas injection by low pressure header 5 and increased interior pressure Depressor 7, enter pipeline by pressure regulation again after being pressurized, so far realize without can be by the work in CNG tank cars by compressor 1.0MPa is down to as pressure., can be by the operating pressure of in-car by the device if the pipeline work pressure in downstream is 1.6MPa Near 0.4MPa.
The utility model is realized without can be by the near 1.0MPa of operating pressure in-car CNG, even by compressor It is lower, it is not necessary to by supercharging equipment, effectively to utilize CNG tank car high-pressure energies, can realize that low pressure gas is discharged into middle pressure pipeline, together When reduce throttle effect, reduce heater power, reduce energy consumption.

Claims (2)

1. a kind of CNG discharge apparatus, it is characterised in that including pressure classification equipment, be connected with this pressure classification equipment High pressure gas ejecting supercharger, the rear pressure regulation being connected respectively with the pressure classification equipment and high pressure gas ejecting supercharger are set It is standby,
Described pressure classification equipment includes one group of connecting pipe, and the high pressure for being separately positioned on one group of connecting pipe end is converged Pipe, middle pressure header and low pressure header, the three-way valve I being separately positioned on the connecting pipe, three-way valve II, with the height The high-pressure heater that pressure header is connected, the middle pressure heater being connected with medium pressure header,
Described rear pressure adjustment equipment includes the pressure regulating valve I being connected with the high pressure gas ejecting supercharger, with medium pressure The pressure regulating valve II that heater is connected.
2. CNG discharge apparatus according to claim 1, it is characterised in that one group of described connecting pipe unloads with multiple Gas interface is connected.
CN201720511335.9U 2017-05-10 2017-05-10 CNG discharge apparatus Active CN206827673U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720511335.9U CN206827673U (en) 2017-05-10 2017-05-10 CNG discharge apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720511335.9U CN206827673U (en) 2017-05-10 2017-05-10 CNG discharge apparatus

Publications (1)

Publication Number Publication Date
CN206827673U true CN206827673U (en) 2018-01-02

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112413398A (en) * 2020-11-19 2021-02-26 西安交通大学 Hydrogenation system and method for hydrogenation station
CN112413397A (en) * 2020-11-18 2021-02-26 西安交通大学 Pressurizing and filling device for hydrogenation station, and system and method using device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112413397A (en) * 2020-11-18 2021-02-26 西安交通大学 Pressurizing and filling device for hydrogenation station, and system and method using device
CN112413397B (en) * 2020-11-18 2021-11-23 西安交通大学 Pressurizing and filling device for hydrogenation station, and system and method using device
CN112413398A (en) * 2020-11-19 2021-02-26 西安交通大学 Hydrogenation system and method for hydrogenation station
CN112413398B (en) * 2020-11-19 2021-11-23 西安交通大学 Hydrogenation system and method for hydrogenation station

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