CN202158352U

CN202158352U - L-CNG (liquefied-compressed natural gas) dual-gas resource gas supply device

Info

Publication number: CN202158352U
Application number: CN2011201094652U
Authority: CN
Inventors: 谭文君; 王卫东; 田淼
Original assignee: BEIJING ZHONGRAN WEIYE GAS Co Ltd
Current assignee: BEIJING ZHONGRAN WEIYE GAS Co Ltd
Priority date: 2011-04-14
Filing date: 2011-04-14
Publication date: 2012-03-07
Anticipated expiration: 2021-04-14

Abstract

The utility model discloses an L-CNG (liquefied-compressed natural gas) dual-gas resource gas supply device, which comprises an LNG (liquefied natural gas) storage tank, a supercharging structure, a high-pressure gasification heating structure, a gasification structure without being supercharged and a pressure regulation structure, wherein one output end of the supercharging structure is connected with one input end of the high-pressure gasification heating structure; one output end of the high-pressure gasification heating structure is connected with one input end of a CNG (compressed natural gas) storage tank or bottle group; one output end of the CNG storage tank or bottle group is connected with a CNG automobile dispenser; the other output end of the supercharging structure is connected with an LNG automobile dispenser; one end of the gasification structure without being supercharged is connected with the storage tank; the other end of the gasification structure without being supercharged is connected with the pressure regulation structure; the output end of the pressure regulation structure is connected with an user side in order to implement a plurality of dual-gas resource gas supply methods. The LNG and CNG gas resources can supply the gas at the same time, which are flexible and convenient and satisfy the market demand; the natural gas compressor cannot be used in the whole supercharging process; only the small-power LNG low-temperature high-pressure pump is used in absence of using cooling water; therefore, the L-CNG dual-gas resource gas supply device is energy-saving and small in noise.

Description

L-CNG dual gas supply air feeder

Technical field

The utility model relates to a kind of L-CNG dual gas supply air feeder, claims liquefaction, compressed natural gas dual gas supply air feeder again.

Background technique

For gas-fueled vehicles, compressed natural gas (CNG) automobile is widely used in the whole nation at present, and also under the support of government, bus and taxi are all used CNG instead and made fuel in many cities, has made huge contribution for reducing urban atmospheric pollution.But CNG is a gaseous state, and memory space is limited in limited vehicle-mounted container, the frequent aerating of so just having to; Requirement to gas station quantity increases, and has limited the development of gas-fueled vehicles, and rock gas also can be used as civilian simultaneously; But some natural air-air source is far away apart from the city; It is many to lay the gas pipeline difficulty, the separately full LNG Liquefied natural gas cost of investment height of building a station, and having influenced the part city is the fast development of plenum system with CNG, LNG; Realized not readjusting the energy structure and energy-saving and emission-reduction, also shown not good economic benefit simultaneously.

The model utility content

In order to solve above-mentioned technical deficiency, the special L-CNG dual gas supply air feeder that adopts.At first it uses LNG as source of the gas, and the compression ratio of LNG will be higher than CNG, and the container haul distance of same volume can be grown more than 3 times thus; Ensured timely supply away from source of the gas ground usefulness gas; LNG is the low-temp low-pressure storage, and danger is littler when vehicle-mounted transportation and storage, can use with gas peak peak regulation; LNG is more pure on the cleanliness of combustion gas, can be used as the high-quality source of the gas and transfers to users such as city resident, the Gongjian of hotel, industry, refueling.The whole process of boosting of equipment operation is not used natural gas compressor, only uses small-power LNG cryogenic high pressure pump, need not cooling water, greatly reduces noise pollution like this, has practiced thrift a large amount of electric energy.Secondly realize not only that the dual gas supply supply also can practice thrift a large amount of land used funds of building a station, relevant corollary equipment is mounted to the sled piece, and safety and environmental protection, noise are low, maneuverability, is convenient to transportation, and automaticity is high, easy to operate.Not only can improve rock gas user's economic benefit, also will play positive social benefit environmental protection.

L-CNG dual gas supply air feeder on the one hand with low pressure (0～0.8MPa), the LNG of low temperature (162 ℃～145 ℃) is transformed into normal temperature, high pressure (20MPa) rock gas, be filled in the CNG automobile through the CNG filling machine.This device comprises the LNG storage tank; Pressure structure, high-pressure gasified heating arrangement, CNG storage tank or bottle group; Said LNG storage tank through on fill mouthful and fill mouth down LNG is imported in the storage tank; The output terminal of LNG storage tank connects the input end of pressure structure, and a wherein output terminal of pressure structure connects high-pressure gasified heating arrangement input end, and the output terminal of high-pressure gasified heating arrangement connects the input end of CNG storage tank or bottle group; The output terminal of CNG storage tank or bottle group connects CNG refueling end, and another output terminal of said pressure structure connects LNG refueling end.

Said gasification structure without supercharging (LNG air-heating type gasifier) end links to each other with storage tank, and the other end connects pressure adjusting structure, and the output terminal of pressure adjusting structure connects user side.

Said pressure structure comprises LNG automatic pressure intensifier, pressure regulator valve, LNG cryogenic high pressure pump; Said LNG,, returns the LNG storage tank and constitutes via LNG automatic pressure intensifier and pressure regulator valve from LNG storage tank output from boost-up circuit, and the LNG storage tank links to each other with LNG cryogenic high pressure pump, and the LNG storage tank also links to each other with the BOG heater; Be equipped with Safety relief valve on LNG storage tank liquid outlet, LNG automatic pressure intensifier, the LNG cryogenic high pressure pump.

Said high-pressure gasified heating arrangement comprises LNG high pressure air-heating type gasifier, EAG heater, BOG heater, high pressure recuperator; Said LNG high pressure air-heating type gasifier input end connects LNG cryogenic high pressure pump; Export an end order of connection control panel, the output the other end connects the high pressure recuperator; Said EAG heater connects the LNG storage tank, and said LNG gasification heating arrangement is provided with Safety relief valve.

Gasification structure one end without supercharging links to each other with storage tank, and the other end connects pressure adjusting structure, and the output terminal of pressure adjusting structure connects user side.

It also comprises LNG air-heating type gasifier, electric heater, filter, pressure governor, flowmeter, device for adding odor.LNG air-heating type gasifier input end links to each other with LNG storage tank output terminal, and the LNG air-heating type gasifier is exported an end and is connected with electric heater, and the other end is connected with filter; One end of filter connects electric heater and BOG heater respectively, and the other end connects pressure governor, said pressure governor connection traffic meter; Said flowmeter connects device for adding odor; Said device for adding odor connects user's output terminal, wherein is provided with Safety relief valve before the device for adding odor, and the BOG heater connects the LNG storage tank.

Further, LNG cryogenic high pressure pump is 2 the tunnel.

Further, LNG high pressure air-heating type gasifier is the 1-2 road.

Further, said pressure governor is the 2-3 road.

Description of drawings

Fig. 1 is the structure flow chart of L-CNG dual gas supply air feeder;

Wherein: 1LNG storage tank, 2 automatic pressure intensifiers, 3 pressure regulator valves, 4LNG cryogenic high pressure pump, 5LNG high pressure air-heating type gasifier; The 6LNG air-heating type gasifier, 7EAG heater, 8BOG heater, 9 high pressure recuperators, 10 sequence control dishes; 11CNG storage tank or bottle group, 12CNG prizes car, 13CNG refueling machine, 14LNG refueling machine, 15 electric heaters; 16 filters, 17 pressure governors, 18 flowmeters, 19 device for adding odor, 20 Safety relief valves.

Embodiment

Embodiment below in conjunction with description of drawings the utility model.

As shown in Figure 1; The utility model, the LNG tank car unloads the liquid pipe through two-way low temperature LNG is discharged into LNG storage tank 1, and wherein the LNG liquid phase part is through automatic pressure intensifier 2 superchargings;, modulating valve 3 sends LNG storage tank 1 back to after regulating pressure; A part of liquid natural gas is pumped in the LNG high pressure air-heating type gasifier 5 from LNG cryogenic high pressure pump 4 in the storage tank, and in vaporizer, LNG and air carry out heat exchange and undergo phase transition becoming gas; Gasification is an isopiestic process, when LNG becomes gas phase CNG, still can keep the 20MPa high pressure conditions.When getting into winter; Because ambient temperature is crossed low or the surperficial frosting of vaporizer when seriously causing gas temperature to be near or below the desired minimum temperature of equipment, tubing, gasification back pressurized gas are got in CNG storage tanks or the bottle group 11 by sequence control dish 10 after high pressure recuperator 9 carries out exchange heat.Gas diffuses after 7 heating of EAG heater in the LNG storage tank, and said cryogenic high pressure pipeline is all to be provided with behind LNG cryogenic high pressure pump 4 front and back, LNG high pressure air-heating type gasifier 5 backs, the LNG air-heating type gasifier 6 to diffuse valve 20.

Another part liquid phase LNG becomes medium pressure gas without pump but directly get in the LNG air-heating type gasifier 6, and the gasification back gets into filter 16, transfers to the pressure regulation metering end, under the low excessively situation of ambient temperature in winter, needs through electric heater 15.Gas phase gas transfers to filter 16 after heating through BOG heater 8 in the storage tank; Converge with medium pressure gas; Common through behind pressure governor 17, the flowmeter 18, add the device for adding odor 19 that smelly pump is formed through tetrahydrothiophene storage tank and metering, add smelly in proportion automatically to rock gas.After adding smelly dose, can be when the L-CNG device to take place to leak, the people can smell its smell.Add smelly back and transport to resident's end, industrial user's end, hotel, Gongjian's user side respectively according to different pressure level systems.Wherein be equipped with Safety relief valve 20 before BOG heater 8 backs and the device for adding odor 19.

CNG sled car 12 is by CNG storage tank or 11 aeratings of bottle group simultaneously; Transfer to CNG refueling machine 13 through CNG storage tank 11 one tunnel in addition; Use as the CNG refueling; Without LNG high pressure air-heating type gasifier 5, but directly transport to LNG refueling machine 14 through a part of LNG of pump pressurization, make the LNG refueling and use.The whole process of boosting of equipment operation is not used natural gas compressor, only uses small-power LNG cryogenic high pressure pump, need not cooling water, greatly reduces noise pollution like this, has practiced thrift a large amount of electric energy.

The utility model belongs to domestic new type double source of the gas plenum system, and all devices is matured product, and is low as the LNG operating cost of source of the gas, and whole investment is easy to reclaim.The utilization of L-CNG air feed equipment both can have been satisfied investor's interests, can promote the development of combustion gas cause again.

What should explain at last is; Above embodiment is only unrestricted in order to the technological scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of the utility model; And not breaking away from the spirit and the scope of the utility model technological scheme, it all should be encompassed in the middle of the claim scope of the utility model.

Claims

1. L-CNG dual gas supply air feeder; It is characterized in that: this device comprises LNG storage tank (1), pressure structure, high-pressure gasified heating arrangement, without the gasification structure and the pressure adjusting structure of supercharging; Said LNG storage tank (1) through on fill mouthful with filling down and mouthful LNG imported in the storage tank, the input end of the output terminal connection pressure structure of LNG storage tank (1), a wherein output terminal of pressure structure connects high-pressure gasified heating arrangement input end; The output terminal of high-pressure gasified heating arrangement connects the input end of CNG storage tank or bottle group; The output terminal of CNG storage tank or bottle group connects CNG refueling end, and another output terminal of said pressure structure connects LNG refueling machine, and said gasification structure one end without supercharging links to each other with storage tank; The other end connects pressure adjusting structure, and the output terminal of pressure adjusting structure connects user side.

2. L-CNG dual gas supply air feeder according to claim 1 is characterized in that: said pressure structure comprises LNG automatic pressure intensifier (2), pressure regulator valve (3), LNG cryogenic high pressure pump (4); Said LNG from boost-up circuit is: LNG storage tank (1) connects LNG automatic pressure intensifier (2); LNG automatic pressure intensifier (2) connects pressure regulator valve (3); Pressure regulator valve (3) connects and composes the loop with LNG storage tank (1) again, and LNG storage tank (1) links to each other with LNG cryogenic high pressure pump (4), and LNG storage tank (1) also links to each other with BOG heater (8); Be equipped with Safety relief valve (20) on LNG storage tank (1) liquid outlet, LNG automatic pressure intensifier (2), the LNG cryogenic high pressure pump (4).

3. L-CNG dual gas supply air feeder according to claim 2; It is characterized in that: said high-pressure gasified heating arrangement comprises LNG high pressure air-heating type gasifier (5), EAG heater (7), BOG heater (8), high pressure recuperator (9); Said LNG high pressure air-heating type gasifier (5) input end connects LNG cryogenic high pressure pump (4); Export an end order of connection control panel (10), the output the other end connects high pressure recuperator (9); Said EAG heater (7) connects LNG storage tank (1), and said LNG gasification heating arrangement is provided with Safety relief valve (20).

4. L-CNG dual gas supply air feeder according to claim 1; It is characterized in that: further comprising LNG air-heating type gasifier (6), electric heater (15), filter (16), pressure governor (17), flowmeter (18), device for adding odor (19); Said LNG air-heating type gasifier (6) input end links to each other with LNG storage tank (1) output terminal; One end of LNG air-heating type gasifier (6) output is connected with electric heater (15) input end, and the other end links to each other with filter (16); One end of said filter (16) connects electric heater (15) and BOG heater (8) respectively, and the other end connects pressure governor (17); Said pressure governor (17) connection traffic meter (18), said flowmeter (18) connect device for adding odor (19), and said device for adding odor (19) connects user's output terminal, the preceding Safety relief valve (20) that is provided with of device for adding odor (19) wherein, and BOG heater (8) connects LNG storage tank (1).

5. L-CNG dual gas supply air feeder according to claim 2 is characterized in that: said LNG cryogenic high pressure pump (4) is 2 the tunnel.

6. L-CNG dual gas supply air feeder according to claim 3 is characterized in that: said LNG high pressure air-heating type gasifier (5) is the 1-2 road.

7. L-CNG dual gas supply air feeder according to claim 4 is characterized in that: said pressure governor (17) is the 2-3 road.