CN213177694U

CN213177694U - BOG recovery system

Info

Publication number: CN213177694U
Application number: CN202021146076.2U
Authority: CN
Inventors: 孙昕; 葛亚春; 张亮
Original assignee: Nantong Aohua Gas Co ltd
Current assignee: Nantong Zhongyu Energy Co.,Ltd.
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-05-11
Anticipated expiration: 2030-06-19

Abstract

The utility model discloses a BOG recovery system, increase the gasification pipeline, unload notch and corresponding pipeline, make it unload two car tank cars simultaneously, the input of the equipment of taking out pressure increases the pipeline that two way and gasifier's input are connected, make its in-process that the concora crush unloaded take out pressure equipment not participate in work in the past, solve among the prior art concora crush in-process in earlier stage because the low temperature can make the equipment of taking out pressure frost in the BOG recovery system, cause the problem that the equipment of taking out pressure inside circuit leads to the power short circuit because frosting, a notch has been increased on current BOG recovery system simultaneously, improve the utilization efficiency of equipment of taking out pressure, and reduce the tank car time of lining up, guarantee that the gas is sufficient in the municipal middling pressure pipe network.

Description

BOG recovery system

Technical Field

The utility model relates to a field is carried in the gas, concretely relates to BOG recovery system.

Background

The BOG recovery system is characterized in that low-temperature liquid natural gas which cannot be conveyed in a storage tank on a tank car through pressure difference is treated and then conveyed to a municipal medium-pressure pipe network, the output end of the BOG recovery system is directly connected with the municipal medium-pressure pipe network, the input end of the BOG recovery system is directly connected with a discharge opening of the storage tank in the tank car through a metal hose, as shown in figure 1, the existing BOG recovery system comprises a pressure pumping device, a pressure pumping pipeline and a gasification pipeline, the output end of the pressure pumping device is communicated with the municipal medium-pressure pipe network through the pressure pumping pipeline and the gasification pipeline in sequence, the gasification pipeline comprises a gasifier A, a flow meter, a one-way valve, a stop valve and the gasification pipeline, the gas inlet end of the pressure pumping device is provided with a discharge opening, the discharge opening is directly connected with the discharge opening of the storage tank on the tank car to be discharged through the metal hose, the gas outlet end of the pressure pumping device is directly, the gasifier A is connected with a municipal medium-pressure pipe network through a gasification pipeline, and a flowmeter, a one-way valve and a stop valve are sequentially arranged on the gasification pipeline;

the BOG recovery system only independently recovers a single vehicle, when the pressure of a tank car is higher than 0.2MPa, natural gas in the tank car storage tank is flatly pressurized into a gasifier through a bypass pipeline in equipment to be gasified at normal temperature by utilizing the pressure difference between the pressure in the tank car storage tank and a municipal pipe network, and finally the natural gas enters the municipal pipe network through metering until the pressure in the storage tank is level with the pressure of the municipal pipe network or the flow rate is slow, the rest pressure needs to be recovered by starting the BOG recovery system by utilizing a suction machine, and the operation flow of recovering the whole set of BOG is normally completed after the pressure in the storage tank is reduced to 0.15 MPa. Generally, the time for recovering the pressure of the storage tank of a normal vehicle is about 25 to 30 minutes; if low-temperature liquid natural gas remains in the vehicle storage tank, frost is generated on equipment and pipelines in the BOG recovery system due to too low temperature in the early stage of flattening process, and the power supply short circuit is caused by frosting of internal circuits of the equipment in the BOG recovery system due to long-time low temperature, so that potential safety hazards are generated; the original BOG recovery system has certain potential safety hazard under the design and actual operation conditions, the starting frequency of equipment is low, the queuing time of a tank car is long, the conveying efficiency is greatly influenced, and the phenomenon of insufficient gas in a municipal medium-pressure pipe network is caused.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at solving not enough among the prior art, the utility model provides a BOG recovery system, increase gasification pipeline, discharge notch and the pipeline that corresponds, make it unload two cars simultaneously, the input of pumping equipment increases the pipeline that two tunnel and gasifier's input are connected, make its in-process pumping equipment that unloads at the concora crush in the past not participate in work, solve among the prior art concora crush in-process because the temperature is low excessively can pump equipment frost in the BOG recovery system, cause the problem that pumping equipment inner line leads to the power short circuit because of frosting, a notch has been increased on current BOG recovery system simultaneously, improve the utilization efficiency of pumping equipment, and reduce the tank wagon time of lining up, guarantee that the gas is sufficient in the municipal medium voltage pipe network.

The technical scheme is as follows: the utility model relates to a BOG recovery system, the BOG recovery system is to be carried to the municipal medium pressure pipe network after the low temperature liquefied natural gas that can not be carried in the storage tank on the tank wagon through pressure differential is handled, BOG recovery system output is directly connected with the municipal medium pressure pipe network, BOG recovery system input is directly connected with the discharge opening of the storage tank in the tank wagon through metal hose, the BOG recovery system is by pumping equipment, vaporizer A, vaporizer B, pipeline, flowmeter, check valve, stop valve, connecting tube, gasification pipeline, intercommunication pipeline are constituteed, pumping equipment input is equipped with first notch pipeline, be equipped with the stop valve on the first notch pipeline, first notch pipeline is connected with the discharge gate on the storage tank through metal hose, the end of giving vent to anger of vaporizer A, vaporizer B is connected with municipal medium pressure pipe network through gasification pipeline respectively, the gasifier is characterized in that a flow meter, a check valve and a stop valve are sequentially arranged on a gasification pipeline between the gasifier A and the municipal medium-pressure pipeline network and between the gasifier B and the municipal medium-pressure pipeline network, the input end of the gasifier A is respectively connected with the input end of the pressure pumping equipment and the notch pipeline of the output end of the pressure pumping equipment through a conveying pipeline, the stop valves are respectively arranged between the input end of the gasifier A and the input end of the pressure pumping equipment and on the conveying pipelines of the input end of the gasifier A and the output end of the pressure pumping equipment, the input end of the gasifier B is provided with a second notch pipeline, the second notch pipeline is connected with a discharge port on the storage tank through a metal hose, the communicating pipeline is arranged between the first notch pipeline and the second notch pipeline, so that the first notch pipeline and the second notch pipeline are communicated, the stop valve is arranged on the communicating pipeline, and the connecting pipeline is arranged between the second notch, and the second notch pipeline is communicated with an output end conveying pipeline of the pumping equipment, and a stop valve is arranged on the connecting pipeline.

Furthermore, the input end of the gasifier A and the stop valve of the conveying pipeline of the output end of the pumping equipment are arranged on the conveying pipeline between the connecting pipeline and the input end of the gasifier A.

Further, stop valve on the first notch pipeline sets up on the first notch pipeline between pipeline and the intercommunication pipeline on the first notch pipeline, pipeline sets up the input position at first notch pipeline stop valve, the intercommunication pipeline sets up the output end position at first notch pipeline stop valve.

Has the advantages that: the utility model relates to a BOG recovery system, increase the gasification pipeline, the notch of unloading and the pipeline that corresponds, make it can unload two tank cars simultaneously, the input of the equipment of taking out pressure increases the pipeline that two tunnel and gasifier's input are connected, make its in-process that the concora crush unloaded at the concora crush equipment not participate in work, solve among the prior art concora crush in-process in earlier stage because the low frosting of taking out pressure equipment in can BOG recovery system of temperature low, cause the problem that the equipment internal line of taking out pressure leads to the power short circuit because of frosting, a notch has been increased on current BOG recovery system simultaneously, improve the utilization efficiency of the equipment of taking out pressure, and reduce tank car queuing time, guarantee that the gas is sufficient in the municipal middling pressure pipe network.

Drawings

FIG. 1 is a schematic diagram of a prior art BOG recovery system in the background art;

FIG. 2 is a schematic structural view of the BOG recycling system of the present invention;

1. a pressure extraction device; 2. a gasifier A; 3. a gasifier B; 4. a delivery conduit; 5. a flow meter; 6. a one-way valve; 7. a stop valve; 8. connecting a pipeline; 9. a gasification pipeline; 10. a communicating pipe; 11. a first slot conduit; 12. a second slotted conduit.

Detailed Description

As shown in fig. 2, a BOG recovery system, wherein the BOG recovery system is to process low-temperature liquefied natural gas which cannot be transported in a storage tank on a tank car by pressure difference and then transport the processed low-temperature liquefied natural gas to a municipal medium-pressure pipe network, an output end of the BOG recovery system is directly connected with the municipal medium-pressure pipe network, an input end of the BOG recovery system is directly connected with a discharge opening of the storage tank in the tank car by a metal hose, the BOG recovery system is composed of a pumping device 1, a gasifier a2, a gasifier B3, a transport pipeline 4, a flowmeter 5, a check valve 6, a stop valve 7, a connecting pipeline 8, a gasification pipeline 9 and a communication pipeline 10, an input end of the pumping device 1 is provided with a first notch pipeline 11, the first notch pipeline 11 is provided with the stop valve 7, the first notch pipeline 11 is connected with a discharge opening on the storage tank by the metal hose, gas outlet ends of the gasifier a2 and the gasifier B3 are respectively connected with the municipal medium-pressure, the gasifier A2 and the municipal medium pressure pipe network, the gasifier B3 and the municipal medium pressure pipe network between the gasification pipeline 9 is equipped with flowmeter 5, check valve 6, stop valve 7 in proper order, the gasifier A2 input passes through pipeline 4 and respectively with the pressure equipment 1 input, the pressure equipment 1 output notch pipe connection, between gasifier A2 input and the pressure equipment 1 input, all be equipped with stop valve 7 on the gasifier A2 input and the pressure equipment 1 output pipeline 4, the gasifier B3 input is equipped with second notch pipeline 12, second notch pipeline 12 passes through metal collapsible tube and is connected with the discharge gate on the storage tank, the intercommunication pipeline 10 sets up between first notch pipeline 11 and second notch pipeline 12, makes first notch pipeline 11 and second notch pipeline 12 communicate, be equipped with stop valve 7 on the intercommunication pipeline 10, the connecting pipeline 8 is arranged between the second notch pipeline 12 and the output end conveying pipeline 4 of the pressure pumping equipment 1, so that the second notch pipeline 12 is communicated with the output end conveying pipeline 4 of the pressure pumping equipment 1, and the connecting pipeline 8 is provided with a stop valve 7.

Further in this example, the shut-off valve 7 of the supply line 4 between the input of the vaporizer a2 and the output of the pressure extraction device 1 is arranged on the supply line 4 between the connecting line 8 and the input of the vaporizer a 2.

Further in this example, the shut-off valve 7 on the first notch pipe 11 is arranged on the first notch pipe 11 between the delivery pipe 4 on the first notch pipe 11 and the communication pipe 10, the delivery pipe 4 being arranged at the position of the input end of the first notch pipe 11 shut-off valve 7, the communication pipe 10 being arranged at the position of the output end of the first notch pipe 11 shut-off valve 7.

The BOG recovery system can realize simultaneous recovery of two vehicles, the pressure difference which is higher than 0.2MPa in the early stage is utilized to flatly press the pressure in the tank to a municipal medium-pressure pipe network, the pressure does not need to pass through the interior of the pressure pumping equipment 1 during the flat pressing, the pressure directly enters the conveying pipeline 4 connected with the gasifier A2 through the first notch pipeline 11, directly enters the gasifier B3 through the second notch pipeline 12, and is gasified at normal temperature through the gasifier A2 or B and then metered into the municipal medium-pressure pipe network, so that the condition that a power supply circuit in the pressure pumping equipment 1 in the BOG recovery system is frosted due to the influence of low temperature is avoided, and safety accidents are caused; the main aspect of efficiency improvement is that when two vehicles are subjected to flat pressing simultaneously, one of the two vehicles starts the BOG recovery system to utilize the press to continue to perform the pressure pumping after the end of the flat pressing in advance, the other vehicle can continue the flat pressing at will, after the end of the complete pressure pumping of the first vehicle, the other vehicle also roughly completes the flat pressing process, and then the BOG recovery system is switched over, namely the stop valve 7 on the communicating pipeline 10 is controlled to be switched over, so that uninterrupted cross recovery operation is realized, the average recovery time of one tank car is about 15-20 minutes, meanwhile, the waiting time of the tank car is greatly reduced, and the working efficiency is improved.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a BOG recovery system, BOG recovery system is with on the tank wagon low temperature liquefied natural gas that can not transport through pressure differential in the storage tank handle the back carry for municipal medium pressure pipe network in, BOG recovery system output is direct to be connected with municipal medium pressure pipe network, and BOG recovery system input passes through metal collapsible tube and directly is connected its characterized in that with the discharge opening of storage tank in the tank wagon: BOG recovery system is by taking out pressure equipment, vaporizer A, vaporizer B, pipeline, flowmeter, check valve, stop valve, connecting tube, and gasification pipeline, the intercommunication pipeline is constituteed, it is equipped with first notch pipeline to take out pressure equipment input, be equipped with the stop valve on the first notch pipeline, first notch pipeline passes through metal collapsible tube and is connected with the discharge gate on the storage tank, vaporizer A, vaporizer B's the end of giving vent to anger is connected with municipal middling pressure pipe network through gasification pipeline respectively, be equipped with flowmeter, check valve, stop valve on the gasification pipeline between vaporizer A and the municipal middling pressure pipe network, between vaporizer B and the municipal middling pressure pipe network in proper order, vaporizer A input passes through pipeline and is connected with the notch pipeline of taking out pressure equipment input, taking out pressure equipment output respectively, between vaporizer A input and the taking out pressure equipment input, a, All be equipped with the stop valve on the pipeline of gasifier A input and extraction pressure equipment output, the input of gasifier B is equipped with second notch pipeline, second notch pipeline passes through metal collapsible tube and is connected with the discharge gate on the storage tank, the intercommunication pipeline sets up between first notch pipeline and second notch pipeline, makes first notch pipeline and second notch pipeline communicate, be equipped with the stop valve on the intercommunication pipeline, the connecting tube sets up between second notch pipeline and extraction pressure equipment's output pipeline, makes second notch pipeline and extraction pressure equipment's output pipeline intercommunication, be equipped with the stop valve on the connecting tube.

2. The BOG recovery system according to claim 1, wherein: the gasifier A input and the check valve of the delivery conduit of the extraction equipment output are arranged on the delivery conduit between the connecting conduit and the gasifier A input.

3. The BOG recovery system according to claim 1, wherein: stop valve on the first notch pipeline sets up on the first notch pipeline between pipeline and the intercommunication pipeline on the first notch pipeline, pipeline sets up the input position at first notch pipeline stop valve, the intercommunication pipeline sets up the output position at first notch pipeline stop valve.