CN203656578U - Wide-gas inflow constant-flow CNG compression plant - Google Patents
Wide-gas inflow constant-flow CNG compression plant Download PDFInfo
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- CN203656578U CN203656578U CN201420013317.4U CN201420013317U CN203656578U CN 203656578 U CN203656578 U CN 203656578U CN 201420013317 U CN201420013317 U CN 201420013317U CN 203656578 U CN203656578 U CN 203656578U
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- piston compressor
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Abstract
The utility model provides a wide-gas inflow constant-flow CNG (Compressed Natural Gas) compression plant. The wide-gas inflow constant-flow CNG compression plant comprises a piston compressor, a program board, a gas storage group and a gas dispenser, all of which are orderly connected with each other; a control cabinet is connected with and controls the piston compressor, and the gas storage group is a combination of a low-pressure gas storage group, a medium-pressure gas storage group and a high-pressure gas storage group connected in parallel; the wide-gas inflow constant-flow CNG compression plant is characterized in that a natural gas pipeline is connected with a pressure stabilizing device, the pressure stabilizing device is connected with a buffer tank, the buffer tank is connected with the piston compressor, and the control cabinet is connected with the pressure stabilizing device and the buffer tank, respectively, and controls the pressure stabilizing device and the buffer tank; the pressure stabilizing device is composed of a pressure reducing unit and a pressure boosting unit connected together in parallel, the pressure reducing unit is connected with the natural gas pipeline and the buffer tank, the pressure boosting unit is connected with the natural gas pipeline and the buffer tank, and the control cabinet connected with the pressure reducing unit and the pressure boosting unit, respectively, and controls the pressure reducing unit and the pressure boosting unit. The wide-gas inflow constant-flow CNG compression plant enables the piston compressor of a gas station to adapt to the natural gas conveyed from the pipeline within a wider pressure range.
Description
Technical field
The utility model belongs to a kind of CNG aerator, relates in particular to a kind of architecture advances to CNG gas station compressor.
Background technique
Current CNG both domestic and external gas station is in the majority with city planting ductwork rock gas with rock gas, and therefore, the air inlet gas pressure of gas station is relatively low, and along with variation, the difference of city's domestic gas time period in season, the suction pressure fluctuation of gas station is larger; In addition, because CNG gas station requires more than 20MPa by rock gas exhaust pressure, the working pressure of Normal squeezing machine is pressed 25Mpa design, thereby has determined that this type of CNG station is main with natural gas compressor mainly with piston compressor, and adopts the mode of multistage compression to carry out; Once a kind of compressor has designed, the base speed of piston is definite, and the air displacement of compressor will change along with the fluctuation of suction pressure, and the air inlet scope relative narrower of compressor; Thereby bring inconvenience to the Plant model selection of CNG gas station, increased the operating cost of gas station simultaneously.
The structure of existing CNG piston compressor system as shown in Figure 1, piston compressor 101, one-way valve 102, program board 103, gas storage group, filling machine 107, automobile 108 are linked in sequence successively, control cabinet 109 connects and control piston formula compressor 101, and wherein gas storage group is low pressure gas storage group 104, middle pressure gas storage group 105,106 parallel connections of high-pressure gas group.Piston compressor 101 is connected with natural gas line.CNG aerating idiographic flow is: after the ducted natural gas via that comes from gas station enters piston compressor 101 and compresses step by step, discharge and enter program board 103 through one-way valve 102, now can enter respectively different gas storage groups according to the pressure condition of low pressure gas storage group 104, middle pressure gas storage group 105, high-pressure gas group 106, join in automobile 108 finally by filling machine 107.
Existing gas station compressor has the following disadvantages:
If 1 user compressor used and actual pipe natural gas pressure have big difference, will cause and cannot use, need to equipment again be changed or be transformed;
If 2 gas stations suction pressures fluctuations are too large, gas station will select the compressor of two kinds or above different model;
3, gas station is when with gas peak or winter, because suction pressure is too low, causes that compressor air-discharging amount is too little maybe can not be moved; Thereby gas station can not normally be moved.
Model utility content
The utility model provides a kind of wide air inlet constant flow CNG compressor set, its objective is and solve the shortcoming that prior art exists, make the rock gas transporting from pipeline of the wider pressure range of piston type compressed function adaptation of gas station, reduce floor space, number of devices, investment and the operating cost of CNG gas station.
The utility model solves the technological scheme that its technical problem adopts:
A kind of wide air inlet constant flow CNG compressor set, comprise that piston compressor, program board, gas storage group, filling machine are linked in sequence successively, control cabinet connects and control piston formula compressor, described gas storage group is low pressure gas storage group, middle pressure gas storage group, the parallel connection of high-pressure gas group, it is characterized in that: natural gas line is connected with stable-pressure device, stable-pressure device is connected with knock out drum, knock out drum is connected with piston compressor, and control cabinet is connected with stable-pressure device and knock out drum respectively and controls stable-pressure device and knock out drum; Described stable-pressure device is pressure regulating equipment and supercharging equipment in parallel, pressure regulating equipment is connected with natural gas line and knock out drum, supercharging equipment is connected with natural gas line and knock out drum, and control cabinet is connected with pressure regulating equipment and supercharging equipment respectively and controls pressure regulating equipment and supercharging equipment.
Usefulness of the present utility model is:
The utility model is owing to increasing a stable-pressure device before a kind of piston compressor, make it after this device, reach a constant pressure from ducted rock gas, thereby the pressure that enters piston compressor suction port is a steady state value, the extraction flow that guarantees compressor with it is a steady state value, namely meet gas station in the situation that of suction pressure wide variation, the air displacement of compressor is a steady state value; This stable-pressure device possesses decompression, boosting capability, and makes the pressure after its decompression or supercharging relatively stable, reaches the object of voltage stabilizing; This stable-pressure device and piston compressor are subject to the control of same set of control system; This equipment guarantees that a gas station changes relatively large in the situation that at suction pressure, and the air displacement of compressor is constant, guarantees the normal operation of CNG gas station, thereby effectively reduces floor space, number of devices, investment and the operating cost of CNG gas station.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is prior art structural drawing;
Fig. 2 is the utility model structural drawing.
Embodiment
As shown in Figure 2, in the utility model, natural gas line is exported from ducted rock gas, natural gas line is connected with stable-pressure device 110, stable-pressure device 110 is selected rock gas decompressor for pressure regulating equipment 13(pressure regulating equipment 13 in parallel) and supercharging equipment 14(supercharging equipment 14 select screw compressor or hydraulic compressed machine), pressure regulating equipment 13 both sides are respectively equipped with valve 11 and one-way valve 15, valve 11 is connected with natural gas line, one-way valve 15 is connected with knock out drum 111, supercharging equipment 14 both sides are respectively equipped with valve 12 and one-way valve 16, valve 12 is connected with natural gas line, one-way valve 16 is connected with knock out drum 111.Knock out drum 111 is connected with piston compressor 101, and piston compressor 101(selects level Four compression piston type compressor), one-way valve 102, program board 103, gas storage group (being by low pressure gas storage group 104, middle pressure gas storage group 105, the high-pressure gas group 106 gas storage group forming in parallel), filling machine 107, automobile 108 be linked in sequence successively.Control cabinet 109 is connected with pressure regulating equipment 13, valve 11, one-way valve 15, supercharging equipment 14, valve 12, one-way valve 16, knock out drum 111, piston compressor 101 respectively and control and pressure regulating equipment 13, valve 11, one-way valve 15, supercharging equipment 14, valve 12, one-way valve 16, knock out drum 111, piston compressor 101.
First the rock gas coming from natural gas line enters the stable-pressure device 110 of this system, select its operating mode according to pipeline pressure situation, by pressure stability to the suction port that enters piston compressor after the air inlet of piston compressor 101 requires, after the compressions at different levels of piston compressor 101, refrigerated separation, discharge high pressure air, specific works flow process is as follows:
A: when the output of gas station natural gas line is from ducted gas pressure during higher than the suction pressure of piston compressor 101: the ducted gas pressure of gas station that first control cabinet 109 collects is compared with the suction pressure that piston compressor 101 requires, when from ducted gas pressure during higher than piston compressor 101 suction pressure, pressure regulating equipment 13 in starting stable-pressure device 110, be Open valve 11 and pressure regulating equipment 13, come from from ducted natural gas via valve 11, pressure regulating equipment 13, the rear inflow knock out drum 111 of one-way valve 15, after storing voltage stabilizing, knock out drum 111 enters piston compressor 101, compress step by step through piston compressor 101 again, cooling, after separating, (can be level Four) discharges pressurized gas, discharge and enter program board 103 through one-way valve 102, now can be according to low pressure gas storage group 104, middle pressure gas storage group 105, the pressure condition of high-pressure gas group 106 enters respectively different gas storage groups, join in automobile 108 finally by filling machine 107.(also can supply with other equipment for CNG gas station uses); The monitoring of whole controlled process cabinet 109 processed is also adjusted automatically, the suction pressure that remains piston compressor 101 is a steady state value, guarantee no matter how to change from the pressure of ducted rock gas, the air displacement of this CNG compression set is a steady state value.
B: when the output of gas station natural gas line is from ducted gas pressure during lower than the suction pressure of piston compressor 101: the ducted gas pressure of gas station that first control cabinet 109 collects is compared with the suction pressure that piston compressor 101 requires, when from ducted gas pressure during lower than piston compressor 101 suction pressure, supercharging equipment 14 in starting stable-pressure device 110, be Open valve 12 and supercharging equipment 14, come from from ducted natural gas via valve 12, supercharging equipment 14, the rear inflow knock out drum 111 of one-way valve 16, after storing voltage stabilizing, knock out drum 111 enters piston compressor 101, compress step by step through piston compressor 101 again, cooling, after separating, (can be level Four) discharges pressurized gas, discharge and enter program board 103 through one-way valve 102, now can be according to low pressure gas storage group 104, middle pressure gas storage group 105, the pressure condition of high-pressure gas group 106 enters respectively different gas storage groups, join in automobile 108 finally by filling machine 107.(also can supply with other equipment for CNG gas station uses); The monitoring of whole controlled process cabinet 109 processed is also adjusted automatically, the suction pressure that remains piston compressor 101 is a steady state value, guarantee no matter how to change from the pressure of ducted rock gas, the air displacement of this CNG compression set is a steady state value.
The volume of knock out drum 111 is many times of piston compressor 101 volume flows, has the effect of buffering voltage stabilizing, and the suction pressure that makes to enter piston compressor 101 is more stable.
Claims (1)
1. one kind wide air inlet constant flow CNG compressor set, comprise that piston compressor, program board, gas storage group, filling machine are linked in sequence successively, control cabinet connects and control piston formula compressor, described gas storage group is low pressure gas storage group, middle pressure gas storage group, the parallel connection of high-pressure gas group, it is characterized in that: natural gas line is connected with stable-pressure device, stable-pressure device is connected with knock out drum, knock out drum is connected with piston compressor, and control cabinet is connected with stable-pressure device and knock out drum respectively and controls stable-pressure device and knock out drum; Described stable-pressure device is pressure regulating equipment and supercharging equipment in parallel, pressure regulating equipment is connected with natural gas line and knock out drum, supercharging equipment is connected with natural gas line and knock out drum, and control cabinet is connected with pressure regulating equipment and supercharging equipment respectively and controls pressure regulating equipment and supercharging equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420013317.4U CN203656578U (en) | 2014-01-09 | 2014-01-09 | Wide-gas inflow constant-flow CNG compression plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420013317.4U CN203656578U (en) | 2014-01-09 | 2014-01-09 | Wide-gas inflow constant-flow CNG compression plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203656578U true CN203656578U (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420013317.4U Expired - Fee Related CN203656578U (en) | 2014-01-09 | 2014-01-09 | Wide-gas inflow constant-flow CNG compression plant |
Country Status (1)
| Country | Link |
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| CN (1) | CN203656578U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949374A (en) * | 2017-05-03 | 2017-07-14 | 自贡通达机器制造有限公司 | CNG refueling systems and method |
| US11624356B2 (en) | 2021-02-11 | 2023-04-11 | John B. King | Gas transport and pressurization system |
-
2014
- 2014-01-09 CN CN201420013317.4U patent/CN203656578U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949374A (en) * | 2017-05-03 | 2017-07-14 | 自贡通达机器制造有限公司 | CNG refueling systems and method |
| CN106949374B (en) * | 2017-05-03 | 2019-01-29 | 自贡通达机器制造有限公司 | CNG refueling system and method |
| US11624356B2 (en) | 2021-02-11 | 2023-04-11 | John B. King | Gas transport and pressurization system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20170109 |