CN103899917A - Compressed natural gas supply station and compressor exhaust gas recycling method thereof - Google Patents
Compressed natural gas supply station and compressor exhaust gas recycling method thereof Download PDFInfo
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- CN103899917A CN103899917A CN201210582527.0A CN201210582527A CN103899917A CN 103899917 A CN103899917 A CN 103899917A CN 201210582527 A CN201210582527 A CN 201210582527A CN 103899917 A CN103899917 A CN 103899917A
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Abstract
The invention discloses a compressed natural gas supply station with a compressor exhaust gas recycling function. The compressed natural gas supply station comprises a main gas intake pipe, a delivery gas circuit and a recovery gas circuit. The delivery gas circuit comprises a gas intake pressure stabilizing tank, a dehydrating device, multiple groups of parallel compressors, a gas storage cylinder group and a gas dispenser which are connected serially and sequentially through a gas pipe, the recovery gas circuit comprises a recovery pressure stabilizing tank and a decompressor and is connected between exhaust gas emission ports of the compressors and the main gas intake pipe through the gas pipe. The invention further discloses a compressor exhaust gas recycling method of the compressed natural gas supply station. The method includes performing pressure stabilizing, drying and compression on natural gas in the delivery gas circuit sequentially, then delivering the compressed natural gas into the gas storage cylinder group, then delivering the natural gas to an external device through the gas dispenser, delivering exhaust gas of the compressors into the recovery gas circuit to be subjected to pressure stabilizing and decompression sequentially, and then delivering the decompressed exhaust gas into the main gas intake pipe so as to reenter the delivery gas circuit for recycling. The exhaust gas emitted by the compressors can be recovered and recycled, so that utilization rate of natural gas is increased, and economical efficiency and environmental protection are realized.
Description
Technical field
The present invention relates to a kind of supply station, relate in particular to a kind of compressed natural gas supply station and compressor waste gas recycling method thereof.
Background technique
The compressed natural gas supply station of prior art generally comprises surge tank, dewatering unit, compressor, air cylinder group, filling machine, these devices interconnect by tracheae successively, process and be stored in air cylinder group the rock gas of the outer input of standing is dried to compression, and by filling machine, the compressed natural gas storing in air cylinder group is flowed to outside compressed natural gas gas equipment.According to the working principle of compressor and fill the requirement of aerating technique, after each compressor operating is shut down, in compressor body as compression cylinders at different levels, in the parts such as separator, all can leave the rock gas not draining and pressure is different, when again starting compressor, the unloaded zero load startup of gas, prevent the motor overload operation that ensures safety, and be also the structural requirement of compressor itself, keep each parts under outage state if the component such as filler are not for a long time in pressured state, the working life of elongated component, must be by the rock gas of these different pressures by manual operation to release discharge in atmosphere, therefore the every work of compressor once will produce the gas that once must discharge, be so-called compressor waste gas.Because the compressed natural gas supply station of prior art is directly discharged into these compressor waste gas in atmosphere, therefore the utilization ratio of rock gas is lower, and atmosphere is polluted.
Summary of the invention
The invention provides a kind of compressed natural gas supply station and compressor waste gas recycling method thereof, can reclaim and cycling and reutilization the waste gas of compressor discharge, improved gas utilization factor, economic environmental protection.
The present invention realizes by the following technical solutions:
A kind of compressed natural gas supply station, comprise total inlet pipe and the conveying gas circuit being connected with total inlet pipe, described conveying gas circuit comprises the air inlet surge tank, dewatering unit, mutual many groups compressor, air cylinder group, the filling machine in parallel that are connected in series successively by tracheae, and described compressor is provided with suction port, air outlet, Waste gas outlet; Be characterized in, the compressed natural gas supply station of described this compressor waste gas recycling also comprises recovery gas circuit, and described recovery gas circuit comprises the recovery surge tank and the decompressor that connect by tracheae; The suction port of described recovery surge tank is connected with the Waste gas outlet of many groups compressor of parallel connection by tracheae; The air outlet of described decompressor is connected with total inlet pipe by tracheae.
Above-mentioned compressed natural gas supply station, is characterized in, described decompressor also comprises: two pressure gauges, two ball valves 222 and 224, a pressure governor, a safety check, a stop valve; Described ball valve 222, pressure governor, ball valve 224, safety check are connected in series successively; One end of described stop valve is connected with the suction port of ball valve 222, and its other end is connected with the air outlet of safety check; Pressure gauge described in two is separately positioned on the air outlet of suction port and the safety check of ball valve 222.
A kind of compressed natural gas supply station compressor waste gas recycling method, for above-mentioned compressed natural gas supply station, is characterized in, described the method includes the steps of:
Step 1, outside rock gas input by total inlet pipe in the conveying gas circuit of compressed natural gas supply station, carries out after voltage stabilizing and dewatering unit be dried, organizing respectively compressors input successively through air inlet surge tank more.
Step 2, rock gas after compression, generates compressed natural gas in each group of compressor, and also produces compressor waste gas after the each shutdown of compressor.
Step 3, the compressed natural gas of respectively organizing in compressor is inputted and is stored in air cylinder group by the relief opening of compressor and through tracheae, by filling machine, the compressed natural gas in air cylinder group is flowed to external equipment.
Step 4, respectively organizes compressor waste gas in compressor and is entered and reclaimed in gas circuit by the Waste gas outlet of compressor, and carries out after voltage stabilizing and decompressor regulate air pressure size successively input total inlet pipe through reclaiming surge tank.
Above-mentioned compressed natural gas supply station compressor waste gas recycling method, is characterized in, described step 3 compressed natural gas is inputted and is stored in air cylinder group and enters in recovery gas circuit and recycle simultaneously and carry out with step 4 compressor waste gas.
The present invention has following good effect:
The present invention carries gas circuit and reclaims gas circuit owing to being provided with, and reclaim gas circuit and comprised the recovery surge tank and the decompressor that connect by tracheae, reclaiming gas circuit one end is connected with the Waste gas outlet that is arranged on the compressor in conveying gas circuit, its the other end is connected with total inlet pipe, thereby the compressor waste gas of compressor discharge is input in total inlet pipe in recovery gas circuit after voltage stabilizing and decompression, and again enter to carry in gas circuit and recycle, improve gas utilization factor, economic environmental protection, is with a wide range of applications.
Brief description of the drawings
Fig. 1 is the schematic diagram of a kind of compressed natural gas supply station of the present invention;
Fig. 2 is the structural representation of the decompressor of a kind of compressed natural gas supply station of the present invention;
Fig. 3 is the schematic flow sheet of a kind of compressed natural gas supply station of the present invention compressor waste gas recycling method.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
Consult shown in accompanying drawing 1, a kind of compressed natural gas supply station of the present invention comprises total inlet pipe 10 and the conveying gas circuit 1 being connected with total inlet pipe 10, and this conveying gas circuit 1 comprises the air inlet surge tank 11, dewatering unit 12, mutual many groups compressor 13, air cylinder group 14, the filling machine 15 in parallel that are connected in series successively by tracheae 20.Compressor 13 is wherein provided with suction port 131, air outlet 132, Waste gas outlet 133.The compressed natural gas supply station of this compressor waste gas recycling also comprises recovery gas circuit 2, and this recovery gas circuit 2 comprises: the recovery surge tank 21 connecting by tracheae 20 and decompressor 22.The suction port that reclaims surge tank 21 is connected with the Waste gas outlet 133 of many groups compressor 13 of parallel connection by tracheae 20; The air outlet of decompressor 22 is connected with total inlet pipe 10 by tracheae 20.Solid line in accompanying drawing 1 represents to carry gas circuit 1, and dotted line represents to reclaim gas circuit 2, and arrow represents gas throughput direction.
Consult shown in accompanying drawing 2, reclaim decompressor 22 in gas circuit 2 and also comprise two pressure gauges 221, two ball valves 222 and 223, pressure governor 224, safety check 225, a stop valve 226.Ball valve 222, pressure governor 224, ball valve 223, safety check 225 are connected in series successively; One end of stop valve 226 is connected with the suction port of ball valve 222, and its other end is connected with the air outlet of safety check 225; Two pressure gauges 221 are separately positioned on the air outlet of suction port and the safety check 225 of ball valve 222, and two pressure gauges 221 are separately positioned on suction port and the air outlet of decompressor 22.In accompanying drawing, arrow represents gas throughput direction.Two pressure gauges 221 are separately positioned on suction port and the air outlet of decompressor 22, and gas is monitored through the air pressure of decompressor 22 front and back, can adjust in real time according to actual pressure situation the air pressure adjustment scope of decompressor 22.When decompressor is normally worked, stop valve 226 is in cut-off state, gas is after ball valve 222, by pressure governor 224, gas atmosphere is adjusted to predefined air pressure range, carry outward through ball valve 223 and the backward decompressor of safety check 225 afterwards, safety check 225 has prevented that the less gas backstreaming of air pressure mixes with pressurized gas after decompression.In the time that pressure governor 224 or ball valve 222,223 break down, opening stop valve 226, can control by the unlatching size of adjustable cut-off valve 226 flow of pressurized gas, and gas is discharged, and enters intake manifold 10.Above-mentioned ball valve, pressure governor, stop valve, safety check, pressure gauge all adopts the product of prior art.
In the present embodiment, compressed natural gas supply station of the present invention is provided with and carries gas circuit 1 and reclaim gas circuit 2.Conveying gas circuit 1 comprises the air inlet surge tank 11, dewatering unit 12, mutual two groups of compressors 13, air cylinder group 14, the filling machine 15 in parallel that are connected in series successively by tracheae 20.And one section of tracheae 20 has also been connected in parallel at the two ends of the dewatering unit 12 of conveying gas circuit 1.Reclaiming gas circuit 2 comprises: the recovery surge tank 21 connecting by tracheae 20 and decompressor 22.The suction port that reclaims surge tank 21 is connected with the Waste gas outlet 133 of many groups compressor 13 of parallel connection by tracheae 20; The air outlet of decompressor 22 is connected with total inlet pipe 10 by tracheae 20.And on every group of tracheae 20 of carrying in gas circuit 1 and recovery gas circuit 2, being all provided with valve controls air-flow.Surge tank in the present embodiment, dewatering unit, compressor, air cylinder group, filling machine, tracheae are the product of commercially available prior art.
Consult shown in accompanying drawing 3, a kind of compressed natural gas supply station of the present invention compressor waste gas recycling method, for above-mentioned compressed natural gas supply station, it comprises following steps:
Step 1, outside rock gas is inputted by total inlet pipe 10 in the conveying gas circuit 1 of compressed natural gas supply station, carries out after voltage stabilizing and dewatering unit 12 be dried successively the input compressors 13 of organizing respectively through air inlet surge tank 11 more.
Step 2, rock gas after compression, generates compressed natural gas in each group of compressor 13, and also produces compressor waste gas after the each shutdown of compressor.
According to the working principle of compressor and fill the requirement of aerating technique, after each compressor operating is shut down, in compressor body as compression cylinders at different levels, in the parts such as separator, all can leave the rock gas not draining and pressure is different, when again starting compressor, the unloaded zero load startup of gas, prevent the motor overload operation that ensures safety, and be also the structural requirement of compressor itself, keep each parts under outage state if the component such as filler are not for a long time in pressured state, the working life of elongated component, must be by the rock gas release discharge of these different pressures, therefore the every work of compressor once will produce the compressor waste gas that once must discharge.
Step 3, the compressed natural gas of respectively organizing in compressor 13 is inputted and is stored in air cylinder group 14 by relief opening 132 the process tracheae 20 of compressor 13, by filling machine 15, the compressed natural gas in air cylinder group 14 is flowed to external equipment.
Step 4, respectively organizes compressor waste gas in compressor 13 and is entered and reclaimed in gas circuit 2 by the Waste gas outlet 133 of compressor 13, and carries out after voltage stabilizing and decompressor 22 regulate air pressure size successively input total inlet pipe 10 through reclaiming surge tank 21.
Above-mentioned step 1 loops to step 4 always.
In the present embodiment, the rock gas air pressure that supply station transports is outward within the scope of 0.15 ~ 0.35MPa, more unstable, and the concrete implementation step of its compressed natural gas supply station compressor waste gas recycling method is:
Step 1, rock gas is inputted by total inlet pipe 10 in the conveying gas circuit 1 of compressed natural gas supply station, after 11 voltage stabilizings of air inlet surge tank are the rock gas of air pressure 0.24MPa, after being input to and being dried in dewatering unit 12, input respectively the suction port 131 of two groups of compressors 13; Due to the dewatering unit 12 two ends one section of tracheae 20 that has been connected in parallel, in the time that dewatering unit 12 breaks down, the rock gas that air pressure is 0.24MPa also can be directly inputted to by the tracheae 20 being connected in parallel with dewatering unit 12 suction port 131 of two groups of compressors 13.
Step 2, rock gas after compression, generates the compressed natural gas of high pressure in each group of compressor 13, and also produces the different compressor waste gas of pressure after the each shutdown of compressor.
Step 3, the compressed natural gas of respectively organizing in compressor 13 is inputted and is stored in air cylinder group 14 by relief opening 132 the process tracheae 20 of compressor 13, by filling machine 15, the compressed natural gas in air cylinder group 14 is flowed to external equipment.
Step 4, simultaneously, the compressor waste gas of the high pressure in each group compressor 13 is entered and is reclaimed in gas circuit 2 by the Waste gas outlet 133 of compressor 13, and be the compressor waste gas of air pressure 1.5 ~ 2MPa through reclaiming surge tank 21 voltage stabilizings, be input to afterwards the compressor waste gas that decompressor 22 decompressions are adjusted to air pressure 0.15 ~ 0.35MPa, and be input in total inlet pipe 10 by tracheae 20, input together with the rock gas transporting outward with supply station to carry in gas circuit 1 and continue to recycle.
In sum, the present invention carries gas circuit and reclaims gas circuit owing to being provided with, and reclaim gas circuit and comprised the recovery surge tank and the decompressor that connect by tracheae, reclaiming gas circuit one end is connected with the Waste gas outlet that is arranged on the compressor in conveying gas circuit, its the other end is connected with total inlet pipe, thereby the compressor waste gas of compressor discharge is input in total inlet pipe in recovery gas circuit after voltage stabilizing and decompression, and again enter to carry in gas circuit and recycle, improve gas utilization factor, economic environmental protection, is with a wide range of applications.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Read after foregoing those skilled in the art, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (3)
1. a compressed natural gas supply station, comprise total inlet pipe (10) and the conveying gas circuit (1) being connected with total inlet pipe (10), described conveying gas circuit (1) comprises the air inlet surge tank (11), dewatering unit (12), mutual many groups compressor (13), air cylinder group (14), the filling machine (15) in parallel that are connected in series successively by tracheae (20), and described compressor (13) is provided with suction port (131), air outlet (132), Waste gas outlet (133); It is characterized in that, the compressed natural gas supply station of described this compressor waste gas recycling also comprises recovery gas circuit (2), and described recovery gas circuit (2) comprises the recovery surge tank (21) and the decompressor (22) that connect by tracheae (20); The suction port of described recovery surge tank (21) is connected with the Waste gas outlet (133) of many groups compressor (13) of parallel connection by tracheae (20); The air outlet of described decompressor (22) is connected with total inlet pipe (10) by tracheae (20).
2. compressed natural gas supply station as claimed in claim 1, it is characterized in that, described decompressor (22) also comprises: two pressure gauges (221), two ball valves (222,223), a pressure governor (224), a safety check (225), a stop valve (226); Described ball valve (222), pressure governor (224), ball valve (223), safety check (225) are connected in series successively; One end of described stop valve (226) is connected with the suction port of ball valve (222), and its other end is connected with the air outlet of safety check (225); Pressure gauge (221) described in two is separately positioned on the air outlet of suction port and the safety check (225) of ball valve (222).
3. a compressed natural gas supply station compressor waste gas recycling method, for compressed natural gas supply station claimed in claim 1, is characterized in that, described the method includes the steps of:
Step 1, in the conveying gas circuit (1) of outside rock gas by total inlet pipe (10) input compressed natural gas supply station, carries out after voltage stabilizing and dewatering unit (12) be dried the input compressors (13) of organizing respectively successively through air inlet surge tank (11);
Step 2, rock gas after compression, generates compressed natural gas in each group of compressor (13), and also produces compressor waste gas after the each shutdown of compressor;
Step 3, compressed natural gas in each group compressor (13) is inputted and is stored in air cylinder group (14) by the relief opening (132) of compressor (13) and through tracheae (20), by filling machine (15), the compressed natural gas in air cylinder group (14) is flowed to external equipment;
Step 4, compressor waste gas in each group compressor (13) is entered and is reclaimed in gas circuit (2) by the Waste gas outlet (133) of compressor (13), and carry out after voltage stabilizing and decompressor (22) regulate air pressure size successively input total inlet pipe (10) through reclaiming surge tank (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210582527.0A CN103899917A (en) | 2012-12-28 | 2012-12-28 | Compressed natural gas supply station and compressor exhaust gas recycling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210582527.0A CN103899917A (en) | 2012-12-28 | 2012-12-28 | Compressed natural gas supply station and compressor exhaust gas recycling method thereof |
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| CN103899917A true CN103899917A (en) | 2014-07-02 |
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| CN201210582527.0A Pending CN103899917A (en) | 2012-12-28 | 2012-12-28 | Compressed natural gas supply station and compressor exhaust gas recycling method thereof |
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Cited By (3)
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| CN105674054A (en) * | 2014-11-17 | 2016-06-15 | 罗纳德·格兰特·肖莫迪 | Waste gas treatment and transportation for conserving resources and reducing emission |
| CN105782719A (en) * | 2016-04-28 | 2016-07-20 | 朗华全能自控设备（上海）股份有限公司 | High-pressure waste gas recycling system |
| CN107165823A (en) * | 2017-07-19 | 2017-09-15 | 张谭伟 | A kind of multifunctional air compressor and the pneumoelectric system containing the air compressor machine |
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Cited By (3)
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| CN107165823A (en) * | 2017-07-19 | 2017-09-15 | 张谭伟 | A kind of multifunctional air compressor and the pneumoelectric system containing the air compressor machine |
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