CN115282744A - Natural Gas Recovery Unit - Google Patents

Abstract

The invention discloses a natural gas recovery device which comprises a first natural gas inlet pipe and a plurality of gas-liquid separators, wherein the first natural gas inlet pipe is used for natural gas mixed material to enter, the gas-liquid separators are arranged in series, the discharge end of the first natural gas inlet pipe is communicated with the feed inlets of the gas-liquid separators, a refrigerating device is arranged on the side of each gas-liquid separator, a liquid outlet is formed in the bottom of each gas-liquid separator, the liquid outlet is communicated with a liquid outlet pipe, an air outlet is formed in the side of each gas-liquid separator, and the air outlet is communicated with a first air outlet pipe. The invention improves the gas-liquid separation efficiency of the natural gas, and simultaneously, the gas-liquid separator with novel design does not need multiple groups of gas-liquid separators for multiple separation, thereby reducing the overall cost of the natural gas recovery device, reducing the separation time and improving the recovery efficiency.

Description

Natural Gas Recovery Unit

technical field

The invention relates to the technical field of natural gas, in particular to a natural gas recovery device.

Background technique

The natural gas recovery device is used to uniformly recover the unseparated natural gas to achieve the effect of secondary recovery and utilization of the unseparated natural gas, but the existing natural gas recovery device usually requires multiple gas-liquid separation devices for multiple separations , This not only increases the overall cost of the natural gas recovery device, but also increases the separation time for multiple gas-liquid separation devices and reduces the recovery efficiency. Therefore, how to provide a natural gas recovery device is an urgent problem to be solved by those skilled in the art.

Contents of the invention

One object of the present invention is to propose a natural gas recovery device. The present invention improves the separation efficiency of natural gas and liquid. At the same time, the newly designed gas-liquid separator does not need multiple groups for multiple separations, which reduces the overall cost of the natural gas recovery device and reduces the separation rate. time, improving the efficiency of recycling.

A natural gas recovery device according to an embodiment of the present invention includes a first natural gas inlet pipe for mixing natural gas and a plurality of gas-liquid separators arranged in series, the discharge end of the first natural gas inlet pipe is connected to the gas-liquid The feed port of the separator is connected, the side of the gas-liquid separator is provided with a refrigeration device, the bottom of the gas-liquid separator is provided with a liquid outlet, and the liquid outlet is connected to the liquid outlet pipe. An air outlet is opened on the side of the liquid separator, and the air outlet is communicated with the first air outlet pipe.

Optionally, a first switch valve is installed on the flange of the first natural gas intake pipe, the first natural gas intake pipe communicates with the second natural gas intake pipe, and the first natural gas intake pipe communicates with the second natural gas intake pipe. Pipe shock absorbers are installed at the bottom of the trachea.

Optionally, an automatic drain valve is installed on the upper flange of the liquid outlet pipe.

Optionally, the first air outlet pipe is communicated with the second air outlet pipe and the third air outlet pipe through a three-way valve, the second switch valve is installed on the flange of the second air outlet pipe, and the third air outlet pipe is The flange is fitted with a safety valve.

Optionally, a check valve and a cartridge filter are sequentially installed on the first air outlet pipe, and a shunt pipe is installed on the first air outlet pipe at both ends of the cartridge filter, and the upper flange of the shunt pipe A differential pressure transmitter is installed.

Optionally, the gas-liquid separator includes a separation body and a plurality of spray pipes vertically installed in the separation body, and the top ends of the spray pipes are arranged in communication with the second natural gas inlet pipe.

Optionally, the spray pipe includes a pipe body, the side of the pipe body is communicated with a side discharge pipe with a discharge port opened upward, and a spray head is installed on the discharge port of the side discharge pipe .

Optionally, a driving motor is provided on the upper side of the separation main body, and a driving pulley is sleeved on the output end shaft of the driving motor, and a driving pulley is sleeved on the spray pipes located outside the separation main body. , a plurality of said driving pulleys are connected through a driving belt transmission.

Optionally, the top end of the spray pipe is connected to the second natural gas inlet pipe through a coupling.

Optionally, a first air guide groove is provided in the wall of the separation main body, and the refrigeration device is connected with the air guide groove, and the inside of the separation main body above the discharge port of the side discharge pipe is equipped with inclined devices. The baffle plate is provided with a second air guide groove inside the baffle plate, and the first air guide groove is communicated with the second air guide groove.

The beneficial effects of the present invention are:

The invention performs secondary recovery and separation on the unseparated natural gas, the spray head has the effect of diverging and spraying the natural gas, and the arrangement of the spray head and the baffle plate can achieve three-dimensional and efficient gas-liquid separation of the natural gas in all aspects, and the gas-liquid The stacked inclined baffles installed in the separator avoid liquid backflow and improve the efficiency of gas-liquid separation of natural gas. At the same time, the newly designed gas-liquid separator does not need multiple groups for multiple separations, which reduces the overall cost of the natural gas recovery device. , while reducing the separation time and improving recovery efficiency.

Description of drawings

In the attached picture:

Fig. 1 is the structural representation of the natural gas recovery device that the present invention proposes;

Fig. 2 is the structural representation of gas-liquid separator in the natural gas recovery device that the present invention proposes;

Fig. 3 is the flow diagram of the internal wind direction of the gas-liquid separator in the natural gas recovery device proposed by the present invention;

Fig. 4 is the structural representation of coupling in the natural gas recovery device that the present invention proposes;

Fig. 5 is a schematic structural view of the injection pipe in the natural gas recovery device proposed by the present invention.

In the figure: 1-first natural gas inlet pipe, 2-gas-liquid separator, 3-first switch valve, 4-pipeline shock absorber, 5-pressure gauge, 6-second natural gas inlet pipe, 7-liquid outlet pipe , 8-automatic steam trap, 9-first air outlet pipe, 10-second air outlet pipe, 11-three-way valve, 12-second switch valve, 13-safety valve, 14-third air outlet pipe, 15-check Valve, 16-Cylinder filter, 17-Split pipe, 18-Pressure differential transmitter, 19-Refrigeration device;

21-Separation main body, 22-Drive motor, 23-Drive belt, 24-Air outlet, 25-Liquid outlet, 26-Spray pipe, 261-Main pipe body, 262-Side discharge pipe, 263-Spray head , 27-baffle plate, 28-coupling, 29-drive pulley.

Detailed ways

Referring to Fig. 1-2, a natural gas recovery device includes a first natural gas inlet pipe 1 for mixing natural gas and a plurality of gas-liquid separators 2 arranged in series, and the discharge end of the first natural gas inlet pipe 1 is connected to the gas The feed port of the liquid separator 2 is connected and arranged, the side of the gas-liquid separator 2 is provided with a refrigeration device 19, the bottom of the gas-liquid separator 2 is provided with a liquid outlet 25, and the liquid outlet 25 is connected with the liquid outlet pipe 7. An air outlet 24 is opened on the side of the liquid separator 2 , and the air outlet 24 is communicated with the first air outlet pipe 9 .

A plurality of gas-liquid separators 2 arranged in series play the role of multi-stage separation of natural gas. Based on the separation efficiency of the gas-liquid separator 2 of the present invention, the number of gas-liquid separators 2 can be 1-3. This implementation In the example, 3 are selected.

The flange on the first natural gas inlet pipe 1 is equipped with a first on-off valve 3, the first natural gas inlet pipe 1 communicates with the second natural gas inlet pipe 6, and the bottom of the first natural gas inlet pipe 1 and the second natural gas inlet pipe 6 are installed There is a pipeline shock absorber 4, and an automatic drain valve 8 is installed on the flange of the liquid outlet pipe 7.

The first air outlet pipe 9 communicates with the second air outlet pipe 10 and the third air outlet pipe 14 through the three-way valve 11, and the second on-off valve 12 is installed on the flange of the second air outlet pipe 10, and the flange on the third air outlet pipe 14 is installed. There is safety valve 13.

A check valve 15 and a cartridge filter 16 are sequentially installed on the first air outlet pipe 9, and a shunt pipe 17 is installed on the first air outlet pipe 9 at both ends of the cartridge filter 16. The upper flange of the shunt pipe 17 is equipped with a Differential transmitter 18.

Referring to Fig. 4, the gas-liquid separator 2 comprises a separation main body 1, and a plurality of spray pipes 26 are vertically installed in the separation main body 1, and the top of the spray pipe 26 is communicated with the second natural gas inlet pipe 6, and the top of the spray pipe 26 is connected to the second natural gas inlet pipe 6. The second natural gas intake pipe 6 is connected through a coupling 28 .

Coupling 28 is composed of upper coupling and lower coupling. The upper coupling and lower coupling are respectively used to communicate with the second natural gas inlet pipe 6 and the spray pipe 26, so that the spray pipe 26 is rotating At the same time, the second natural gas inlet pipe 6 can transmit natural gas to it and also has the function of buffering and improving the dynamic performance of the shafting.

With reference to Fig. 5, the spray pipe 26 includes a pipe body 261, the side of the pipe body 261 is connected with a side discharge pipe 262 with a discharge port upwardly opened, and a spray head 263 is installed on the discharge port of the side discharge pipe 262 , the spray head 263 has the effect of diverging and ejecting the natural gas, and the arrangement of the spray head 263 and the baffle plate 27 can achieve three-dimensional and efficient gas-liquid separation of the natural gas in all aspects.

A plurality of material pipe bodies 261 and a drive motor 22 arranged in parallel form a group of discharge mechanisms, and the discharge mechanisms are set to 1-4 groups. Three-dimensional and efficient gas-liquid separation.

The upper side of the separation main body 1 is provided with a drive motor 22, the output shaft of the drive motor 22 is provided with a drive pulley 29, and the external material spray pipe 26 on the separation main body 21 is provided with a drive pulley 29. The drive pulley 29 is connected by a drive belt transmission.

With reference to Fig. 3, the separation main body 21 wall is provided with the first air guide groove, and the refrigeration device 19 is connected with the air guide groove, and the separation main body 1 above the discharge port of the side discharge pipe 262 is equipped with a folding folding door arranged at an angle. Flow plate 27, the second air guide groove is provided in the baffle plate 27, the first air guide groove is communicated with the second air guide groove, the refrigeration device 19 can be a semiconductor refrigeration device, and the effect of the refrigeration device 19 is to conduct cold air into the separation body 21 and the baffle 27 .

When the natural gas is ejected from the discharge end of the side discharge pipe 262 and contacts the baffle plate 27 of the internal cooling, the liquid in the natural gas will condense, and at the same time, the material pipe body 261 is rotating along the baffle plate 27 under the action of centrifugal force. Water droplets are formed on the bottom surface, and the liquid is discharged to the liquid outlet 25 at the bottom of the separation body 21 along the inclined baffles 27. The stacked and inclined baffles 27 prevent liquid backflow and improve the efficiency of natural gas-liquid separation.

In order to monitor the natural gas pressure on all pipelines in real time to ensure the safety of the overall process, a pressure gauge 5 is installed on the first natural gas inlet pipe 1, the second natural gas inlet pipe 6 and the first gas outlet pipe 9, and the pressure gauge 5 can real-time The pressures of natural gas at different stages on the first natural gas inlet pipe 1 , the second natural gas inlet pipe 6 and the first gas outlet pipe 9 are displayed.

It can be understood that the driving of the automatic steam trap 8, the three-way valve 11, the safety valve 13, the check valve 15, the cartridge filter 16, the differential pressure transmitter 18, the refrigeration device 19 and the driving motor 22 in the present invention The method can be driven by an external power line, automatic drain valve 8, three-way valve 11, safety valve 13, check valve 15, cartridge filter 16, differential pressure transmitter 18, refrigeration device 19 and drive motor 22 The control of the main control system can be used for programming control, and its control principle can be realized by the existing control technology. The models of automatic steam trap 8, three-way valve 11, safety valve 13, check valve 15, cartridge filter 16, differential pressure transmitter 18, refrigeration device 19 and drive motor 22 are not limited to a single type and can be available on the market Existing types suitable for the present invention.

Implementation method:

The natural gas that has not been liquefied and gasified and separated enters through the first natural gas inlet pipe 1, enters the gas-liquid separator 2 through the conduction of the second natural gas inlet pipe 6, starts the drive motor 22 to drive the spray pipe 26 to rotate, and the natural gas is discharged from the side The discharge end of the pipe 262 is sprayed out and contacts the baffle plate 27 of internal cooling, the liquid in the natural gas condenses and at the same time, the material pipe body 261 forms water droplets along the bottom surface of the baffle plate 27 under the action of centrifugal force under the rotation, along the The obliquely arranged baffle plate 27 discharges liquid to the liquid outlet 25 at the bottom of the separation body 21 , and the separated natural gas is exported from the gas outlet 24 and filtered by the cartridge filter 16 .

The present invention performs secondary recovery and separation on the unseparated natural gas, the spray head 263 has the effect of diverging and spraying the natural gas, and the arrangement of the spray head 263 and the baffle plate 27 can achieve three-dimensional and efficient gas-liquid separation of the natural gas in all aspects , the stacked inclined baffles 27 arranged in the gas-liquid separator 2 avoid liquid backflow and improve the gas-liquid separation efficiency of natural gas. The overall cost of the natural gas recovery device, while reducing the separation time and improving the efficiency of recovery.

Claims (10)

1. The utility model provides a natural gas recovery device, its characterized in that, including first natural gas intake pipe (1) and a plurality of vapour and liquid separator (2) of establishing ties the setting that are used for the natural gas compounding to get into, the discharge end of first natural gas intake pipe (1) sets up with the feed inlet intercommunication of vapour and liquid separator (2), vapour and liquid separator (2) side is provided with refrigerating plant (19), liquid outlet (25) have been seted up to vapour and liquid separator (2) bottom, liquid outlet (25) and drain pipe (7) intercommunication set up, gas outlet (24) have been seted up to vapour and liquid separator (2) side just gas outlet (24) and first outlet duct (9) intercommunication set up.

2. The natural gas recovery device according to claim 1, wherein a first switch valve (3) is mounted on the first natural gas inlet pipe (1) in a flange mode, the first natural gas inlet pipe (1) is communicated with a second natural gas inlet pipe (6), and pipeline dampers (4) are mounted at the bottoms of the first natural gas inlet pipe (1) and the second natural gas inlet pipe (6).

3. Natural gas recovery device according to claim 1, characterized in that the outlet pipe (7) is flanged with an automatic trap (8).

4. The natural gas recovery device according to claim 1, wherein the first outlet pipe (9) is communicated with a second outlet pipe (10) and a third outlet pipe (14) through a three-way valve (11), a second switch valve (12) is mounted on the second outlet pipe (10) in a flange mode, and a safety valve (13) is mounted on the third outlet pipe (14) in a flange mode.

5. The natural gas recovery device according to claim 1, characterized in that the first outlet pipe (9) is provided with a check valve (15) and a cartridge filter (16) in sequence, the first outlet pipe (9) at two ends of the cartridge filter (16) is provided with a shunt pipe (17) in a communication manner, and the shunt pipe (17) is provided with a differential pressure transmitter (18) in a flange manner.

6. The natural gas recovery device according to claim 1, wherein the gas-liquid separator (2) comprises a separation main body (1) and a plurality of material spraying pipes (26) vertically installed in the separation main body (1), and the top ends of the material spraying pipes (26) are communicated with the second natural gas inlet pipe (6).

7. The natural gas recovery device according to claim 6, wherein the spraying pipe (26) comprises a pipe body (261), a side discharging pipe (262) with an upward discharging port is installed on the side surface of the pipe body (261) in a communication manner, and a spraying head (263) is installed on the discharging port of the side discharging pipe (262).

8. The natural gas recovery device according to claim 6, wherein a driving motor (22) is arranged on the upper side of the separation main body (1), a driving belt wheel (29) is sleeved on a shaft at the output end of the driving motor (22), driving belt wheels (29) are sleeved on the material spraying pipes (26) which are positioned on the outer portion of the separation main body (21), and the driving belt wheels (29) are in transmission connection through a driving belt.

9. The natural gas recovery device according to claim 8, characterized in that the top end of the spraying pipe (26) is connected with the second natural gas inlet pipe (6) through a coupling (28).

10. The natural gas recovery device according to claim 7, wherein a first air guide groove is formed in the wall of the separation main body (21), the refrigeration device (19) is communicated with the air guide groove, baffle plates (27) which are obliquely arranged are arranged in the separation main body (1) above the discharge port of the side discharge pipe (262), a second air guide groove is formed in each baffle plate (27), and the first air guide groove is communicated with the second air guide groove.

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