CN209067427U - A kind of natural gas compressor - Google Patents
A kind of natural gas compressor Download PDFInfo
- Publication number
- CN209067427U CN209067427U CN201821955575.9U CN201821955575U CN209067427U CN 209067427 U CN209067427 U CN 209067427U CN 201821955575 U CN201821955575 U CN 201821955575U CN 209067427 U CN209067427 U CN 209067427U
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- valve
- gas
- buffer tank
- oil
- compression set
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003345 natural gas Substances 0.000 title claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 99
- 238000007906 compression Methods 0.000 claims abstract description 59
- 230000006835 compression Effects 0.000 claims abstract description 59
- 238000001816 cooling Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007907 direct compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 230000029305 taxis Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a kind of natural gas compressors, pass through the mutual cooperation of the first valve and the second valve, to realize that the gas of this compression set compression drives the pneumatic ball valve of this compression set as instrument wind, while saving user cost, main line and other pipeline switching can also be carried out according to compression set virtual condition, switch compression set between low-load and heavy duty, improves the service life of compression set and the stability of compression set.Pre- shutdown mode is set before shutdown, reduces the oil content inside compression set in gs-oil separator, reduces the oil content of discharge gas, to reduce the consumption of oil, increases the service life of gs-oil separator.After shutdown, the first valve is closed, third valve is opened, gas is recycled in air inlet surge tank, achievees the purpose that resource reclaim, realizes that gas and compression set are cut off, avoids security risk existing for oil sealing gas leakage, guarantee the safety of complete equipment.
Description
Technical Field
The utility model relates to the field of mechanical design, in particular to natural gas compressor.
Background
The natural gas is colorless, tasteless and nontoxic, has the advantages of high heat value, stable combustion, cleanness, environmental protection, low price and the like, and is commonly used as a substitute fuel for urban public transport, taxis, short-distance transportation and distributed energy.
The natural gas that usually needs to be 2barg is direct to be connected with compressor arrangement, compresses the natural gas, and when compressor arrangement just started, compressor arrangement did not get into normal compression operating mode, if direct compression natural gas when the compressor started, the start load of meeting greatly increased compressor arrangement, the life-span of greatly reduced compressor arrangement.
SUMMERY OF THE UTILITY MODEL
In view of the defects in the prior art, the main object of the present invention is to overcome the disadvantages in the prior art, and to disclose a natural gas compressor, which comprises a buffer tank, an air inlet device, a compression device and a cooling device, wherein the buffer tank comprises an air inlet buffer tank and an air outlet buffer tank, and the air inlet buffer tank, the air inlet device, the compression device, the cooling device and the air outlet buffer tank are sequentially connected;
the air inlet device comprises a pneumatic ball valve, a first valve, a second valve, a main pipeline, a bypass pipeline and an air taking pipeline, wherein two ends of the main pipeline and the bypass pipeline are connected with the air inlet buffer tank and the compression device respectively;
and the air outlet end of the compression device is connected with the cooling device through a first check valve.
Further, still include third valve and second check valve, the pipeline of getting gas passes through the third valve with the second check valve with the air inlet buffer tank is connected.
Further, a minimum pressure valve is arranged between the air outlet end of the compression device and the first check valve.
Further, a gas extraction point of the gas extraction pipeline is between the gas outlet end of the compression device and the minimum pressure valve.
Furthermore, the gas outlet buffer tank is externally connected with a safety valve.
Further, still include pressure regulating valve, go out the gas buffer tank with the buffer tank that admits air passes through pressure regulating valve connects.
Further, a filtering device is installed at an air outlet of the air outlet buffer tank.
The utility model discloses the beneficial effect who gains:
the utility model discloses a mutually supporting of first valve and second valve to realize this compressor arrangement compressed gas as instrument wind drive this compressor arrangement's pneumatic ball valve, when practicing thrift user cost, can also carry out main line and other pipeline according to compressor arrangement actual state and switch, make compressor arrangement switch between low load and heavy load, improve compressor arrangement's life and compressor arrangement's stability. The pre-shutdown mode is set before shutdown, so that the oil content in the oil-gas separator in the compression device is reduced, and the oil content of the discharged gas is reduced, thereby reducing the oil consumption and prolonging the service life of the oil-gas separator. After the machine is stopped, the first valve is closed, the third valve is opened, gas is recovered into the gas inlet buffer tank, the purpose of resource recovery is achieved, the gas and the compression device are cut off, potential safety hazards caused by gas leakage of the oil seal are avoided, and the safety of the whole set of equipment is guaranteed.
Drawings
Fig. 1 is a schematic view of a natural gas compressor according to the present invention;
the reference numbers are as follows:
2. the air intake device comprises an air intake device, 3, a compression device, 4, a cooling device, 5, a first check valve, 11, an air intake buffer tank, 12, an air outlet buffer tank, 21, a pneumatic ball valve, 22, a first valve, 23, a second valve 24, a main pipeline, 25, a bypass pipeline, 26, an air intake pipeline, 31, a compressor, 32, an oil tank, 33, an oil-gas separator, 34, a temperature control valve, 35, a third check valve, 36, a filter, 61, a third valve, 62, a second check valve, 64, a minimum pressure valve, 65, a safety valve, 66, a pressure regulating valve, 67 and a filtering device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model discloses a natural gas compressor, as shown in figure 1, comprising a buffer tank, an air inlet device 2, a compression device 3 and a cooling device 4, wherein the buffer tank comprises an air inlet buffer tank 11 and an air outlet buffer tank 12, and the air inlet buffer tank 11, the air inlet device 2, the compression device 3, the cooling device 4 and the air outlet buffer tank 12 are connected in sequence; the natural gas firstly enters the gas inlet buffer tank 11, then the natural gas in the gas inlet buffer tank 11 is conveyed into the compression device 3 through the gas inlet device 2, the compressed natural gas is cooled by the cooling device 4, then the compressed natural gas is flushed into the gas outlet buffer tank 12, and finally the compressed natural gas is discharged into the gas collecting tank. Wherein,
the air inlet device 2 comprises a pneumatic ball valve 21, a first valve 22, a second valve 23, a main pipeline 24, a bypass pipeline 25 and an air taking pipeline 26, wherein both ends of the main pipeline 24 and the bypass pipeline 25 are connected with the air inlet buffer tank 11 and the compression device 3, namely the air inlet buffer tank 11 is connected with the compression device 3 through the main pipeline 24, and the bypass pipeline 25 is connected on the main pipeline 24 in parallel; the pneumatic ball valve 21 is connected in series in a main pipeline 24, the first valve 22 is connected in series in a bypass pipeline 25, the second valve 23 is connected with the air outlet end of the compression device 3 through an air taking pipeline 26, and the second valve 23 controls the connection and disconnection of instrument wind of the pneumatic ball valve 21 so as to control the opening and closing of the pneumatic ball valve 21; the air outlet end of the compression device 3 is connected with the cooling device 4 through a first check valve 5. The first valve 22 and the second valve 23 may use solenoid valves.
The first valve 22 and the second valve 23 are opened, when natural gas in the gas inlet buffer tank 11 enters the gas inlet device 2, the gas flows into the compression device 3 from the bypass pipeline 25, at the moment, the amount of the gas is less, the load of the compression device 3 is reduced, the compression device 3 compresses the gas, the pressure of the gas outlet end of the compression device gradually rises, the pressure of the gas taking point also rises synchronously, the gas is conveyed to the pneumatic ball valve 21 from the gas taking point through the gas taking pipeline 26, after the gas reaches a certain pressure, the pneumatic ball valve 21 is opened, the gas in the gas inlet buffer tank 11 is transmitted through the main pipeline 24, and at the moment, the bypass pipeline 25 can be closed and also can be opened. Through setting up main pipeline and side pipeline, guaranteed that low load starts when equipment starts, reduce the damage to compressor arrangement, improve its life. In addition, the compressed gas of the compressor is used as instrument wind to control the opening and closing of the pneumatic ball valve, external instrument wind is not needed, the use cost of equipment is reduced, and in addition, the gas is used as instrument wind to open the pneumatic ball valve 21 to enable the gas to be input at full speed only when the normal working pressure is reached in the compressor and pipelines thereof, namely the gas pressure reaches the working pressure by matching with the first valve 22 and the second valve 23. It can be seen that the on-off control of the main pipe 24 by the pneumatic ball valve 21 is controlled according to the actual state of the compression device 3, not by time control, and the main pipe 24 is opened only when the compressor reaches the normal working state. Therefore, the service life of the compression device is further prolonged, the compression efficiency is improved, and the energy consumption is reduced.
The compression device 3 comprises a compressor 31, an oil tank 32, an oil-gas separator 33, a temperature control valve 34 and a third check valve 35, wherein the compressor 31, the oil tank 32 and the oil-gas separator 33 are sequentially connected, the oil outlet end of the oil tank 32 is connected with the compressor 31 through the temperature control valve 34 to form a loop, the other end of the temperature control valve 34 is connected with the cooling device 4, and the oil outlet end of the oil-gas separator 33 is connected with the compressor 31 through the third check valve 35. The oil in the oil tank 32 is injected and mixed with the gas when the compressor 31 operates, the oil is compressed and then is transmitted into the oil tank 32 for primary oil-gas separation, most of the oil returns into the oil tank 32, the gas with a small amount of oil enters the oil-gas separator 33, the residual oil is separated from the gas, the oil returns into the compressor 31 through the third check valve 35, and the gas is transmitted into the cooling device 4 through the first check valve 5 for cooling. When the thermo valve 34 senses the temperature rise of the oil, the thermo valve 34 changes the transfer direction, and the oil is sent to the cooling device 4, cooled, and then injected into the compressor 31. Preferably, an oil-gas filter 36 is arranged at the front end of the oil inlet of the compressor 31 to filter oil.
In one embodiment, the gas intake system further comprises a third valve 61 and a second check valve 62, and the gas intake pipeline 26 is connected with the intake buffer 11 tank through the third valve 61 and the second check valve 62. This arrangement is used in the shutdown phase in order to discharge the residual gas from the compressor unit 3 back into the inlet buffer tank 11. The third valve 61 may be a solenoid valve, which controls the on-off of the end pipeline; the second check valve 62 serves to prevent the discharged gas from flowing back into the compression device 3.
In one embodiment, a minimum pressure valve 64 is provided between the outlet end of the compression device 3 and the first check valve 5. The function of the minimum pressure valve 64 is that when the gas reaches the working pressure of the minimum pressure valve 64, the minimum pressure valve 64 will be opened to let the gas pass; the first check valve 5 serves only to prevent the reverse flow; the accuracy of the gas pressure of the compression device 3 is improved by the mutual cooperation of the first check valve 5 and the minimum pressure valve 64.
In a preferred embodiment, the gas extraction point of the gas extraction line 26 is between the gas outlet end of the compression device 3 and the minimum pressure valve 64. The minimum pressure valve 64 ensures that the air can pass after reaching the working pressure, so that the air taking point is arranged in front of the minimum pressure valve 64, and the pressure of the instrument air of the pneumatic ball valve 21 can be ensured to be changed according to the actual situation; if the pressure of the gas compressed by the compressor 3 drops and cannot open the starting valve 21, the gas is delivered by opening the bypass line 25, so that the compressor 3 enters a low-load state; the pressure at the rear end of the minimum pressure valve 64 is always low pressure at the initial stage of starting the compression device 3, the pneumatic ball valve 21 cannot be opened, only when the gas at the front end of the minimum pressure valve 64 reaches the working pressure, the gas is conveyed to the rear end, a long time is needed for the process, the compression device 3 is in a low-load state for a long time, the compression efficiency is low, and the energy consumption is wasted.
In one embodiment, the vent buffer tank 12 is externally connected to a safety valve 65. When the pressure in the gas outlet buffer tank 12 exceeds the pressure of the safety valve 65, the gas in the gas outlet buffer tank 12 is discharged from the safety valve 65, so that the safety of the equipment is ensured. In a preferred embodiment, a pressure regulating valve 66 is further included, and the outlet buffer tank 12 and the inlet buffer tank 11 are connected through the pressure regulating valve 66. When the air pressure in the air-out buffer tank 12 is greater than the working pressure of the pressure regulating valve 66 and less than the pressure of the safety valve 65, the air in the air-out buffer tank 12 is discharged into the air-in buffer tank 11 through the pressure regulating valve 66, so that the waste of the air is avoided, and the air is directly discharged into the air-in buffer tank to be controlled to cause pollution.
In an embodiment, the air outlet of the air inlet buffer tank 11 is provided with a filtering device 67 for filtering air to prevent impurities from entering the rear-end equipment and damaging the equipment.
The utility model also discloses a natural gas compression method, including following step:
s1, connecting an air source into the air inlet buffer tank 11, opening the first valve 22 and the second valve 23, disconnecting the main pipeline 24, connecting the bypass pipeline 25 and operating the compression device 3; the gas enters the compressor 3 through the bypass line 25, and at this time, the gas is a small amount of gas, and the compressor 3 is in a low-load starting state.
S2, compressing the gas in the pipeline by the operation of the compression device 3, increasing the gas pressure at the rear end of the compression device 3, increasing the gas pressure at the gas taking point of the gas taking pipeline 26, conveying the gas into the pneumatic ball valve 21 through the gas taking pipeline 26 and the second valve 23, and starting the cooling device 4 through the passage of the main pipeline 24; at this time, the rear end air pressure of the compression device 3 reaches the normal working pressure, the compression device enters the normal compression state, and the main pipeline 24 is opened to enter the heavy load state for working.
S3, entering a normal compression stage, delivering compressed gas into the gas outlet buffer tank 1 and then discharging the compressed gas into a gas collection tank;
and S4, cutting off the air source and stopping the compressor after other compression is finished.
In step S4, a pre-stop is performed before the stop, where the pre-stop includes closing the second valve 23, opening the first valve 22, reducing the output of the compression device 3 to less than 10%, and operating for at least 30 seconds. This step enables a small amount of oil remaining in the oil-gas separator 33 to be pressed into the compressor 31, which greatly reduces the oil consumption, reduces the oil content in the exhaust gas, and increases the life of the oil-gas separator 33.
In step S4, when the plant is stopped, the first valve 22 is closed and the third valve 61 is opened. This enables the gas in the compression device 3 to be returned to the intake buffer tank 11 through the gas take-off line 26 via the third valve and the second check valve 62. The air inlet device 2 is cut off, the gas in the air inlet buffer tank 11 cannot be transmitted to the rear end equipment, and the oil-free gas is transmitted into the air inlet buffer tank 1 after the gas in the compression device 3 is subjected to oil-gas separation; the gas recovery and the oil recovery are realized, and all parts are cut off, so that the safety of the whole device is protected.
The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.
Claims (7)
1. A natural gas compressor is characterized by comprising a buffer tank, an air inlet device, a compression device and a cooling device, wherein the buffer tank comprises an air inlet buffer tank and an air outlet buffer tank, and the air inlet buffer tank, the air inlet device, the compression device, the cooling device and the air outlet buffer tank are sequentially connected;
the air inlet device comprises a pneumatic ball valve, a first valve, a second valve, a main pipeline, a bypass pipeline and an air taking pipeline, wherein two ends of the main pipeline and the bypass pipeline are connected with the air inlet buffer tank and the compression device respectively;
and the air outlet end of the compression device is connected with the cooling device through a first check valve.
2. The natural gas compressor of claim 1, further comprising a third valve and a second check valve, wherein the gas intake line is connected to the intake buffer tank through the third valve and the second check valve.
3. The natural gas compressor of claim 1, wherein a minimum pressure valve is disposed between the gas outlet end of the compression device and the first check valve.
4. A natural gas compressor as claimed in claim 3, wherein the gas take-off point of the gas take-off line is between the gas outlet end of the compression device and the minimum pressure valve.
5. The natural gas compressor of claim 1, wherein the gas outlet buffer tank is externally connected with a safety valve.
6. The natural gas compressor of claim 5, further comprising a pressure regulating valve, wherein the outlet buffer tank and the inlet buffer tank are connected through the pressure regulating valve.
7. The natural gas compressor as claimed in any one of claims 1 to 6, wherein the outlet of the inlet buffer tank is provided with a filtering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955575.9U CN209067427U (en) | 2018-11-26 | 2018-11-26 | A kind of natural gas compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955575.9U CN209067427U (en) | 2018-11-26 | 2018-11-26 | A kind of natural gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209067427U true CN209067427U (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821955575.9U Active CN209067427U (en) | 2018-11-26 | 2018-11-26 | A kind of natural gas compressor |
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| CN (1) | CN209067427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320671A (en) * | 2021-12-22 | 2022-04-12 | 中船动力镇江有限公司 | Natural gas pressurization system with adjustable flow |
-
2018
- 2018-11-26 CN CN201821955575.9U patent/CN209067427U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320671A (en) * | 2021-12-22 | 2022-04-12 | 中船动力镇江有限公司 | Natural gas pressurization system with adjustable flow |
| CN114320671B (en) * | 2021-12-22 | 2024-08-30 | 中船动力镇江有限公司 | Flow-adjustable natural gas pressurizing system |
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