CN202381193U

CN202381193U - Exhaust recycling device of LNG (Liquefied Natural Gas) transportation tank car

Info

Publication number: CN202381193U
Application number: CN201120546199XU
Authority: CN
Inventors: 沈建; 刘建民; 柳云
Original assignee: JIAXING LIXUN AUTOMOBILE ELECTRONIC CO Ltd
Current assignee: JIAXING LIXUN AUTOMOBILE ELECTRONIC CO Ltd
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2012-08-15
Anticipated expiration: 2021-12-23

Abstract

The utility model discloses an exhaust recycling device of an LNG (Liquefied Natural Gas) transportation tank car, which comprises a tractor, an LNG tank car tank, a safety valve, an exhaust guide pipe, a buffer tank and an engine, wherein the safety valve is arranged on the LNG tank car tank, the engine is arranged on the tractor, the engine is provided with a co-combustion system, one end of the exhaust guide pipe is arranged on an exhaust hole of the safety valve, the other end of the exhaust guide pipe is connected with the buffer tank in a sealing manner, and the buffer tank is connected with the engine through a gas pipeline. By using the exhaust recycling device of the LNG transportation tank car, natural gas exhausted by the LNG transportation tank car can be collected, thus emission pollution is reduced, potential safety hazards are eliminated, exhausted natural gas can be effectively utilized, and energy sources are saved.

Description

A kind of LNG conveying trough vehicle exhaust recycle device

Technical field

The utility model relates to a kind of exhaust gas recovery utilized device, specifically a kind of LNG conveying trough vehicle exhaust recycle device.

Background technique

LNG (LNG Liquefied natural gas) transportation tank car is made up of tractor and LNG tank car jar, and the LNG liquified natural gas is stored in the tank car jar with-162 ℃ of ultralow temperature.The jar internal pressure generally has only 1-3Pa, cryogenic tank safety valve setting 7Pa exhaust pressure.Because the influence of vehicle driving and ambient temperature, the low temperature liquid LNG in the LNG tank car jar can flash to natural gas in gaseous state, and the exhaust phenomenon often takes place by (more contain summer).When inner gas pressure during greater than 7Pa, safety valve is opened, to the airborne release rock gas.Rock gas discharges sky, and second befouling environment exists potential safety hazard first, and three are caused energy waste.With Inner Mongol Wuhai to Guangzhou, Guangdong transport mileage five over thousands of kilometers, autumn, environment mean temperature 24.3 degree were example, and according to incompletely statistics, the liquified natural gas exhaust loss of 20 tons of LNG transportation tank cars of 55 cubes of jars in transportation process reaches 400kg.

Summary of the invention

The utility model technical problem to be solved is to propose a kind of can the rock gas that emit in the transportation process effectively the collection in addition and uses; Both reduce exhaust emission, eliminated the LNG conveying trough vehicle exhaust recycle device of potential safety hazard, energy saving again.

For solving the problems of the technologies described above; A kind of LNG conveying trough of the utility model vehicle exhaust recycle device comprises tractor, LNG tank car jar, safety valve, exhaust leading pipe, knock out drum and motor; Said safety valve is installed on the said LNG tank car jar; Said motor is loaded on the said tractor, and said motor is equipped with the burning system of mixing, and an end of said exhaust leading pipe is installed in the relief opening of said safety valve; The other end of said exhaust leading pipe links to each other with said knock out drum is airtight, and said knock out drum links to each other through gas pipeline with said motor.

Above-mentioned a kind of LNG conveying trough vehicle exhaust recycle device is equipped with the knock out drum safety valve on the said knock out drum.

Above-mentioned a kind of LNG conveying trough vehicle exhaust recycle device; It also comprises electronic control unit ECU; Pressure transducer and solenoid valve are installed on the said gas pipeline, and said pressure transducer, solenoid valve and said motor link to each other with electronic control unit ECU respectively.

Above-mentioned a kind of LNG conveying trough vehicle exhaust recycle device, the setting atmospheric pressure value when said solenoid valve is opened be motor mix burn needed atmospheric pressure value and a definite value and; The setting discharge pressure value of said damping device safety valve is 6.5bar.

The utility model is owing to adopted technique scheme, and it has formed following work cycle: when pressure risings → pressure is greater than the setting value of safety valve in the LNG tank car jar safety valve discharging → damping device (knock out drum) reclaim → when pressure reaches setting value (mix burn needed atmospheric pressure value+definite value like motor) → when air pressure in the motor air feed is mixed burnings → damping device (knock out drum) equals setting value (mixing the needed atmospheric pressure value+definite value of burning like motor) → stop to use other fuel (like diesel oil) driving to motor air feed → motor.When pressure in the LNG tank car jar is elevated to when opening the safety-valve, system just gets into next usefulness gas and mixes and burn circulation.Therefore, utilize the utility model device just to collect the rock gas that the LNG carrier platoon is released, both reduced exhaust emission, eliminated potential safety hazard, make that again the rock gas of discharging can be effectively utilized, practiced thrift the energy.With 380 hp diesel motor tractors is example, in 5000 kilometers stroke, can effectively utilize the LNG of 400kg, is equivalent to practice thrift 2500 yuan, can practice thrift 0.5 yuan for every kilometer.LNG fleet for engaging in transport for a long time has appreciable economic benefit and social benefit.

Description of drawings

Fig. 1 is the structural representation of the utility model LNG conveying trough vehicle exhaust recycle device.

Embodiment

As shown in Figure 1; The utility model LNG conveying trough vehicle exhaust recycle device comprises tractor and LNG tank car jar 1, LNG tank car jar safety valve 2, exhaust leading pipe 3, knock out drum 4, motor 10 and electronic control unit ECU9; Motor 10 is loaded on the tractor; The burning system of mixing is installed on the motor 10, can uses diesel oil to act as a fuel separately, also can rock gas and diesel oil mix burning.LNG tank car jar safety valve 2 is installed on the LNG tank car jar 1, and an end of exhaust leading pipe 3 is installed on the relief opening of safety valve 2, the other end of exhaust leading pipe 3 and 5 airtight linking to each other of knock out drum.On the jar 4 knock out drum safety valve 5 is installed.Knock out drum 4 links to each other through gas pipeline 8 with motor 10.Airtight being connected on the knock out drum 4 of one end of buffering gas pipeline 8, the other end of gas pipeline 8 links to each other with motor 10 after connecting pressure transducer 6 and high-pressure solenoid valve 7 successively.Pressure transducer 6 through motor transducing signal wire harness 13 and engine control signal line 14, links to each other with electronic control unit ECU9 respectively through solenoid valve signaling line 12, motor 10 through sensor signal lines 11, high-pressure solenoid valve 7.

The working principle of the utility model recycle device is following:

1.LNG the low temperature liquid LNG in the tank car jar 1 can flash to natural gas in gaseous state, the exhaust pressure value of the safety valve 2 of general LNG tank car jar 1 is set in P1=7bar;

2. when the inside gas pressure of LNG tank car jar 1 during greater than P1, safety valve 2 is opened, to exhaust leading pipe 3 discharging rock gases;

3. exhaust leading pipe 3 is guided to knock out drum 4 to the rock gas of discharging;

4. for the sake of security, knock out drum safety valve 5 has been installed on the knock out drum 4, the setting discharge pressure of this safety valve 5 is P2=6.5bar.Pressure in knock out drum 4 reaches 6.5bar, just can discharge rock gas safely;

5. pressure transducer 6 and high-pressure solenoid valve 7 have been installed on the pipeline of gas pipeline 8.(P3 is that motor is mixed and burnt needed atmospheric pressure value to the pressure that detects rock gas in the knock out drum 4 through pressure transducer 6 as electronic control unit ECU9, is generally 3bar greater than the P3+ definite value.Definite value can be made as 3bar) time, electronic control unit ECU9 just signals and opens high-pressure solenoid valve 7, and gas pipeline 8 is input to the rock gas in the knock out drum 4 motor 10 of mixing the burning system is housed, and motor 10 begins to mix the burning rock gas.When the pressure that detects knock out drum 4 as electronic control unit ECU9 equaled P3, then electronic control unit ECU9 just signaled and closes high-pressure solenoid valve 7, and system just stops to supply rock gas to motor, and motor just is in combustion diesel oil state.

Electronic control unit ECU9 used in the utility model device is made up of microcomputer, input, output and control circuit etc.; Its function is to carry out computing, processing, judgement according to the information that the program of its internal memory and data are taken into account various sensors inputs to air mass flow; Output order then; To motor electrical pulsing signal is provided, to control employed fuel source and discharge rate.ECU is the existing common technology of automotive field, and the motor that dress is mixed the burning system also is the state of the art, repeats no more here.

Claims

1. LNG conveying trough vehicle exhaust recycle device; Comprise tractor, LNG tank car jar, safety valve and motor, said safety valve is installed on the said LNG tank car jar, and said motor is loaded on the said tractor; It is characterized in that; It also comprises exhaust leading pipe and knock out drum, and an end of said exhaust leading pipe is installed in the relief opening of said safety valve, and the other end of said exhaust leading pipe links to each other with said knock out drum is airtight; Said knock out drum links to each other through gas pipeline with said motor, and said motor is equipped with the burning system of mixing.

2. a kind of LNG conveying trough vehicle exhaust recycle device as claimed in claim 1 is characterized in that, the knock out drum safety valve is installed on the said knock out drum.

3. according to claim 1 or claim 2 a kind of LNG conveying trough vehicle exhaust recycle device; It is characterized in that; It also comprises electronic control unit ECU; Pressure transducer and solenoid valve are installed on the said gas pipeline, and said pressure transducer, solenoid valve and said motor link to each other with electronic control unit ECU respectively.

4. a kind of LNG conveying trough vehicle exhaust recycle device as claimed in claim 3 is characterized in that, the setting atmospheric pressure value when said solenoid valve is opened be motor mix burn needed atmospheric pressure value and a definite value and; The setting discharge pressure value of said damping device safety valve is 6.5bar.