Oil and gas defrost recovery system based on three-way valve

Abstract

The utility model relates to the technical field of oil and gas recovery methods, and discloses an oil and gas defrosting recovery system based on a three-way valve, comprising a first heat exchange channel and a second heat exchange channel arranged in parallel with the first heat exchange channel, the head end of the first heat exchange channel and the head end of the second heat exchange channel are respectively connected to the head end three-way valve, the tail end of the first heat exchange channel and the tail end of the second heat exchange channel are respectively connected to the tail end three-way valve; a connecting channel is provided between the first heat exchange channel and the second heat exchange channel; in the process of condensing and separating the mixed oil and gas into purified oil and gas and water through the first recovery channel, when frost or ice appears in the second heat exchange channel, the first recovery channel is closed and the second recovery channel is opened, and the temperature of the mixed oil and gas itself is used to defrost or defrost the second heat exchange channel, thereby improving the flexibility of use and the application range for users, making the oil and gas recovery efficiency higher, and also reducing the complexity, failure rate and maintenance cost of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas recovery methods, in particular to an oil and gas defrosting recovery system based on a three-way valve. Background Art

[0002] VOCs are precursors of PM2.5 and ozone, and are important precursors of urban haze and photochemical smog. They mainly come from coal chemical industry, petrochemical industry, fuel and paint manufacturing, solvent manufacturing and use, etc.

[0003] The oil and gas recovery system in the relevant technology usually includes an intake pipe network, a heat exchange gas and an exhaust pipe network. When the high-temperature petroleum exhaust gas enters the intake pipe network, the vapor VOCs can be condensed into liquid VOCs under the action of the heat exchanger. Subsequently, the liquid VOCs in the exhaust pipe network can be extracted and recovered, thereby realizing the recovery of harmful VOCs.

[0004] If the heat exchanger is used in winter, some water droplets will accumulate on the surface of the heat exchanger due to the temperature difference between the surface of the heat exchanger and the outside air; however, since the outdoor temperature is relatively low, there will be problems with frost or ice on the surface of the heat exchanger, which will affect the normal use of the heat exchanger. Utility Model Content

[0005] The utility model aims to provide an oil and gas defrosting recovery system based on a three-way valve, aiming to solve the problem of frost or ice on the surface of a heat exchanger in the oil and gas recovery process in the prior art.

[0006] The utility model is implemented as follows: an oil and gas defrosting recovery system based on a three-way valve comprises a first heat exchange channel and a second heat exchange channel arranged in parallel with the first heat exchange channel, the head end of the first heat exchange channel and the head end of the second heat exchange channel are respectively connected to the head end three-way valve, and the head end three-way valve is formed with a head end inlet for the mixed oil and gas to be discharged;

[0007] The tail end of the first heat exchange channel and the tail end of the second heat exchange channel are respectively connected to the tail end three-way valve, and the tail end three-way valve has a tail end outlet for the purified oil and gas to be discharged. The first heat exchange channel and the second heat exchange channel are respectively provided with a cooling or heating heat exchanger;

[0008] A connecting passage is provided between the first heat exchange passage and the second heat exchange passage, and a first intermediate three-way valve and a second intermediate three-way valve are connected to the two ends of the connecting passage respectively, the first intermediate three-way valve is connected to the head end and the tail end of the first heat exchange passage respectively, and the second intermediate three-way valve is connected to the head end and the tail end of the second heat exchange passage respectively;

[0009] The head end inlet, the first heat exchange channel, the first intermediate three-way valve, the connecting channel, the second intermediate three-way valve, the second heat exchange channel and the tail end outlet are connected in sequence to form a first recovery channel; the head end inlet, the second heat exchange channel, the second intermediate three-way valve, the connecting channel, the first intermediate three-way valve, the first heat exchange channel and the tail end outlet are connected in sequence to form a second recovery channel;

[0010] The head end inlet and the tail end outlet are in a normally open state, and the head end three-way valve, the first middle three-way valve, the second middle three-way valve and the tail end three-way valve control the opening or closing of the valve to open or close the first recycling channel or the second recycling channel;

[0011] When the first recovery channel is in an open state, the second recovery channel is in a closed state, the heat exchanger in the first heat exchange channel is in a stopped condensation state, and the heat exchanger in the second heat exchange channel is in a started condensation state, so that the mixed oil and gas are condensed and separated into purified oil and gas and water;

[0012] When the second recovery channel is in an open state, the first recovery channel is in a closed state, the heat exchanger in the second heat exchange channel is in a stopped condensation state, and the heat exchanger in the first heat exchange channel is in a stopped condensation state, so that the mixed oil and gas are condensed and separated into purified oil and gas and water.

[0013] Furthermore, a plurality of heat exchangers are respectively disposed on the first heat exchange channel and the second heat exchange channel, and the plurality of heat exchangers are sequentially connected and arranged along the first heat exchange channel or the second heat exchange channel.

[0014] Furthermore, two heat exchangers are respectively disposed on the first heat exchange channel and the second heat exchange channel, and the two heat exchangers are sequentially connected and arranged along the first heat exchange channel or the second heat exchange channel.

[0015] Furthermore, the first end of the first heat exchange channel is connected to a first first end three-way pipe, and the first first end three-way pipe is respectively connected to the first end three-way valve and the first intermediate three-way valve.

[0016] Furthermore, the tail end of the first heat exchange channel is connected to a first tail end three-way pipe, and the first tail end three-way pipe is respectively connected to the tail end three-way valve and the first intermediate three-way valve.

[0017] Furthermore, the head end of the second heat exchange channel is connected to a second head end three-way pipe, and the second head end three-way pipe is respectively connected to the head end three-way valve and the second intermediate three-way valve.

[0018] Furthermore, the tail end of the second heat exchange channel is connected to a second tail end three-way pipe, and the second tail end three-way pipe is respectively connected to the tail end three-way valve and the second intermediate three-way valve.

[0019] Furthermore, the head end inlet is connected to an intake pipe for discharging the mixed oil and gas into the head end inlet, and the intake pipe is provided with a docking flange connected to an external device; the intake pipe is arranged horizontally, and the inner side wall of the intake pipe is provided with a plurality of baffles made of metal for buffering the flow of the mixed oil and gas, and the plurality of baffles are arranged at intervals along the axial direction of the intake pipe.

[0020] Furthermore, the plurality of blocking plates include a plurality of upper plates and a plurality of lower plates, the plurality of upper plates and the plurality of lower plates are arranged at intervals along the axial direction of the intake pipe, and the upper plates and the lower plates are arranged alternately up and down, and the upper plates and the lower plates are arranged in an offset and overlapping manner up and down.

[0021] Furthermore, the tail end outlet is connected to an outlet pipe for discharging purified oil and gas, and a plurality of metal partition layers are provided in the outlet pipe, and the plurality of partition layers are arranged at intervals along the axial direction of the outlet pipe; the outer periphery of the partition layer is butted against the inner wall of the outlet pipe, and along the flow direction of the purified oil and gas in the outlet pipe, the middle part of the partition layer is arranged to protrude forward, and the protrusion of the partition layer is in a conical shape, and a plurality of mesh holes are provided in the partition layer for the purified oil and gas to pass through.

[0022] Compared with the prior art, the oil and gas defrosting recovery system based on the three-way valve provided by the utility model condenses and separates the mixed oil and gas into purified oil and gas and water through the first recovery channel. When frosting or ice appears in the second heat exchange channel, the first recovery channel is closed and the second recovery channel is opened, and the temperature of the mixed oil and gas itself is used to defrost or defrost the second heat exchange channel, which improves the flexibility and application scope of use for users, makes the oil and gas recovery more efficient, and can also reduce the complexity, failure rate and maintenance cost of the equipment, and also makes the pipeline layout simpler; it solves the problem of frosting or ice on the surface of the heat exchanger in the oil and gas recovery process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structural arrangement of the oil and gas defrosting recovery system based on the three-way valve provided by the utility model;

[0024] Figure 2 It is a schematic diagram of the flow structure arrangement of the first recovery channel provided by the utility model;

[0025] Figure 3 It is a schematic diagram of the flow structure arrangement of the second recovery channel provided by the utility model;

[0026] Figure 4 It is a schematic diagram of the cutaway structure of the air intake pipe provided by the utility model;

[0027] Figure 5 It is a schematic diagram of the cutaway structure of the air outlet pipe provided by the utility model.

[0028] In the figure: a first heat exchange channel 10, a second heat exchange channel 20, a head end three-way valve 30, a tail end three-way valve 40, a heat exchanger 50, a connecting channel 60, a first head end three-way pipe 11, a first tail end three-way pipe 12, a second head end three-way pipe 21, a second tail end three-way pipe 22, an air inlet pipe 31, a blocking plate 32, an upper plate 33, a lower plate 34, an air outlet pipe 41, a partition layer 42, a mesh 43, a first intermediate three-way valve 61, and a second intermediate three-way valve 62. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0031] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Reference Figure 1-5 As shown, it is a preferred embodiment provided by the utility model.

[0033] The oil and gas defrosting recovery system based on the three-way valve comprises a first heat exchange channel 10 and a second heat exchange channel 20 arranged in parallel with the first heat exchange channel 10, the head end of the first heat exchange channel 10 and the head end of the second heat exchange channel 20 are respectively connected to the head end three-way valve 30, and the head end three-way valve 30 forms a head end inlet for the mixed oil and gas to be discharged;

[0034] The tail end of the first heat exchange channel 10 and the tail end of the second heat exchange channel 20 are respectively connected to the tail end three-way valve 40, and the tail end three-way valve 40 has a tail end outlet for the purified oil and gas to be discharged. The first heat exchange channel 10 and the second heat exchange channel 20 are respectively provided with a cooling or heating heat exchanger 50;

[0035] A connecting channel 60 is provided between the first heat exchange channel 10 and the second heat exchange channel 20. The two ends of the connecting channel 60 are connected to a first intermediate three-way valve 61 and a second intermediate three-way valve 62, respectively. The first intermediate three-way valve 61 is connected to the head end and the tail end of the first heat exchange channel 10, respectively, and the second intermediate three-way valve 62 is connected to the head end and the tail end of the second heat exchange channel 20, respectively.

[0036] The head end inlet, the first heat exchange channel 10, the first intermediate three-way valve 61, the connecting channel 60, the second intermediate three-way valve 62, the second heat exchange channel 20 and the tail end outlet are connected in sequence to form a first recovery channel; the head end inlet, the second heat exchange channel 20, the second intermediate three-way valve 62, the connecting channel 60, the first intermediate three-way valve 61, the first heat exchange channel 10 and the tail end outlet are connected in sequence to form a second recovery channel;

[0037] The head end inlet and the tail end outlet are in a normally open state, and the head end three-way valve 30, the first intermediate three-way valve 61, the second intermediate three-way valve 62 and the tail end three-way valve 40 control the opening or closing of the valves to open or close the first recycling channel or the second recycling channel;

[0038] When the first recycling channel is in an open state, the second recycling channel is in a closed state, the heat exchanger 50 in the first heat exchange channel 10 is in a stopped condensation state, and the heat exchanger 50 in the second heat exchange channel 20 is in a started condensation state, so that the mixed oil and gas are condensed and separated into purified oil and gas and water;

[0039] When the second recovery channel is in an open state, the first recovery channel is in a closed state, the heat exchanger 50 in the second heat exchange channel 20 is in a stopped condensation state, and the heat exchanger 50 in the first heat exchange channel 10 is in a stopped condensation state, so that the mixed oil and gas are condensed and separated into purified oil and gas and water.

[0040] The above-mentioned oil and gas defrosting recovery system based on the three-way valve condenses and separates the mixed oil and gas into purified oil and gas and water. When frosting or ice appears on the second heat exchange channel 20, the first recovery channel is closed and the second recovery channel is opened. The temperature of the mixed oil and gas itself is used to defrost or defrost the second heat exchange channel 20, which improves the flexibility and application scope of use for users, makes the oil and gas recovery more efficient, and can also reduce the complexity, failure rate and maintenance cost of the equipment, and also makes the pipeline layout simpler; it solves the problem of frost or ice on the surface of the heat exchanger 50 during the oil and gas recovery process.

[0041] When the first intermediate three-way valve 61 and the second intermediate three-way valve 62 are closed at the same time, the head end three-way valve 30 is connected to the tail end three-way valve 40 through the first heat exchange channel 10 by controlling the valve, so that the first heat exchange channel 10 can recover and process the mixed oil and gas in a single channel;

[0042] When the first heat exchange channel 10 is frosted or frozen, the three-way valve 30 at the head end is connected to the three-way valve 40 at the tail end through the second heat exchange channel 20 by controlling the valve, so that the second heat exchange channel 20 can recover and process the mixed oil and gas in a single channel, thereby improving the efficiency of oil and gas recovery.

[0043] In this embodiment, a plurality of heat exchangers 50 are respectively disposed on the first heat exchange channel 10 and the second heat exchange channel 20 , and the plurality of heat exchangers 50 are sequentially connected and arranged along the first heat exchange channel 10 or the second heat exchange channel 20 .

[0044] Two heat exchangers 50 are respectively disposed on the first heat exchange channel 10 and the second heat exchange channel 20 . The two heat exchangers 50 are sequentially connected and arranged along the first heat exchange channel 10 or the second heat exchange channel 20 .

[0045] The two heat exchangers 50 are used to cool the mixed oil and gas respectively. The first heat exchanger 50 condenses the mixed oil and gas and cools it to 1°C~5°C, and performs preliminary separation of water in the mixed oil and gas. The second heat exchanger 50 condenses the mixed oil and gas and cools it to -60°C~-75°C, and performs secondary separation of water in the mixed oil and gas.

[0046] In this embodiment, the first end of the first heat exchange channel 10 is connected to the first head end three-way pipe 11, and the first head end three-way pipe 11 is respectively connected to the head end three-way valve 30 and the first middle three-way valve 61. In this way, it is convenient for the head end of the first heat exchange channel 10 to be connected to the head end three-way valve 30 and the first middle three-way valve 61 respectively, and it is also convenient for the head end three-way valve 30 or the first middle three-way valve 61 to control the head end of the first heat exchange channel 10 to be closed or opened.

[0047] In this embodiment, the tail end of the first heat exchange channel 10 is connected with a first tail end three-way pipe 12, and the first tail end three-way pipe 12 is respectively connected with the tail end three-way valve 40 and the first middle three-way valve 61. In this way, it is convenient for the first tail end three-way pipe 12 to be respectively connected with the tail end three-way valve 40 and the first middle three-way valve 61, and it is also convenient for the tail end three-way valve 40 and the first middle three-way valve 61 to control the tail end of the first heat exchange channel 10 to be closed or opened.

[0048] In this embodiment, the head end of the second heat exchange channel 20 is connected to the second head end three-way pipe 21, and the second head end three-way pipe 21 is respectively connected to the head end three-way valve 30 and the second middle three-way valve 62. In this way, it is convenient for the second head end three-way pipe 21 to be respectively connected to the head end three-way valve 30 and the second middle three-way valve 62, and it is also convenient for the head end three-way valve 30 or the second middle three-way valve 62 to control the head end of the first heat exchange channel 10 to be closed or opened.

[0049] In this embodiment, the tail end of the second heat exchange channel 20 is connected to the second tail end three-way pipe 22, and the second tail end three-way pipe 22 is respectively connected to the tail end three-way valve 40 and the second middle three-way valve 62. In this way, it is convenient for the second tail end three-way pipe 22 to be respectively connected to the tail end three-way valve 40 and the second middle three-way valve 62, and it is also convenient for the tail end three-way valve 40 or the second middle three-way valve 62 to control the tail end of the first heat exchange channel 10 to be closed or opened.

[0050] In this embodiment, the head end inlet is connected to an intake pipe 31 for discharging the mixed oil and gas into the head end inlet, and the intake pipe 31 is provided with a docking flange connected to an external device; the intake pipe 31 is arranged horizontally, and the inner side wall of the intake pipe 31 is provided with a plurality of baffle plates 32 made of metal and used to buffer the flow of the mixed oil and gas, and the plurality of baffle plates 32 are arranged at intervals along the axial direction of the intake pipe 31.

[0051] The air inlet pipe 31 is used to buffer the flow of the mixed oil and gas through a plurality of baffles 32 to prevent the mixed oil and gas from flowing too fast, thereby affecting the cooling effect of the mixed oil and gas and the effect of separating the water body.

[0052] In this embodiment, the multiple blocking plates 32 include multiple upper plates 33 and multiple lower plates 34, and the multiple upper plates 33 and the multiple lower plates 34 are arranged at intervals along the axial direction of the intake pipe 31, and the upper plates 33 and the lower plates 34 are arranged alternately up and down, and the upper plates 33 and the lower plates 34 are arranged in an offset and overlapping manner up and down.

[0053] The plurality of blocking plates 32 can increase the buffering of the mixed oil and gas flow through the arrangement of the plurality of upper plates 33 and the plurality of lower plates 34 , and can intercept the water in the mixed oil and gas through the structural arrangement of the upper plates 33 and the lower plates 34 .

[0054] In the present embodiment, the tail end outlet is connected to an outlet pipe 41 for discharging purified oil and gas, and a plurality of metal partition layers 42 are provided in the outlet pipe 41, and the plurality of partition layers 42 are arranged at intervals along the axial direction of the outlet pipe 41; the outer periphery of the partition layer 42 is butted against the inner wall of the outlet pipe 41, and along the flow direction of the purified oil and gas in the outlet pipe 41, the middle part of the partition layer 42 is arranged to protrude forward, and the partition layer 42 protrudes in a conical shape, and a plurality of mesh holes 43 are provided in the partition layer 42 for the purified oil and gas to pass through.

[0055] The air outlet pipe 41 performs secondary filtration and condensation on the purified oil and gas through the isolation mesh layer 42 and the mesh 43 and separates the residual water in the purified oil and gas.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The oil and gas defrosting recovery system based on the three-way valve is characterized by: It comprises a first heat exchange channel and a second heat exchange channel arranged in parallel with the first heat exchange channel, wherein the head end of the first heat exchange channel and the head end of the second heat exchange channel are respectively connected to the head end three-way valve, and the head end three-way valve is formed with a head end inlet for the mixed oil and gas to be discharged; The tail end of the first heat exchange channel and the tail end of the second heat exchange channel are respectively connected to the tail end three-way valve, and the tail end three-way valve has a tail end outlet for the purified oil and gas to be discharged. The first heat exchange channel and the second heat exchange channel are respectively provided with a cooling or heating heat exchanger; A connecting passage is provided between the first heat exchange passage and the second heat exchange passage, and a first intermediate three-way valve and a second intermediate three-way valve are connected to the two ends of the connecting passage respectively, the first intermediate three-way valve is connected to the head end and the tail end of the first heat exchange passage respectively, and the second intermediate three-way valve is connected to the head end and the tail end of the second heat exchange passage respectively; The head end inlet, the first heat exchange channel, the first intermediate three-way valve, the connecting channel, the second intermediate three-way valve, the second heat exchange channel and the tail end outlet are connected in sequence to form a first recovery channel; the head end inlet, the second heat exchange channel, the second intermediate three-way valve, the connecting channel, the first intermediate three-way valve, the first heat exchange channel and the tail end outlet are connected in sequence to form a second recovery channel; The head end inlet and the tail end outlet are in a normally open state, and the head end three-way valve, the first middle three-way valve, the second middle three-way valve and the tail end three-way valve control the opening or closing of the valve to open or close the first recycling channel or the second recycling channel; When the first recovery channel is in an open state, the second recovery channel is in a closed state, the heat exchanger in the first heat exchange channel is in a stopped condensation state, and the heat exchanger in the second heat exchange channel is in a started condensation state, so that the mixed oil and gas are condensed and separated into purified oil and gas and water; When the second recovery channel is in an open state, the first recovery channel is in a closed state, the heat exchanger in the second heat exchange channel is in a stopped condensation state, and the heat exchanger in the first heat exchange channel is in a stopped condensation state, so that the mixed oil and gas are condensed and separated into purified oil and gas and water.

2. The oil and gas defrosting recovery system based on a three-way valve according to claim 1, characterized in that: A plurality of heat exchangers are respectively disposed on the first heat exchange channel and the second heat exchange channel, and the plurality of heat exchangers are sequentially connected and arranged along the first heat exchange channel or the second heat exchange channel.

3. The oil and gas defrosting recovery system based on a three-way valve according to claim 2, characterized in that: Two heat exchangers are respectively arranged on the first heat exchange channel and the second heat exchange channel, and the two heat exchangers are sequentially connected and arranged along the first heat exchange channel or the second heat exchange channel.

4. The oil and gas defrosting recovery system based on a three-way valve according to any one of claims 1 to 3, characterized in that: The first end of the first heat exchange channel is connected with a first first end three-way pipe, and the first first end three-way pipe is respectively connected with a first end three-way valve and a first intermediate three-way valve.

5. The oil and gas defrosting recovery system based on a three-way valve according to claim 4, characterized in that: The tail end of the first heat exchange channel is connected with a first tail end three-way pipe, and the first tail end three-way pipe is respectively connected with the tail end three-way valve and the first middle three-way valve.

6. The oil and gas defrosting recovery system based on a three-way valve according to claim 5, characterized in that: The head end of the second heat exchange channel is connected with a second head end three-way pipe, and the second head end three-way pipe is respectively connected with the head end three-way valve and the second middle three-way valve.

7. The oil and gas defrosting recovery system based on a three-way valve according to claim 6, characterized in that: The tail end of the second heat exchange channel is connected with a second tail end three-way pipe, and the second tail end three-way pipe is communicated with the tail end three-way valve and the second middle three-way valve respectively.

8. The oil and gas defrosting recovery system based on a three-way valve according to any one of claims 1 to 3, characterized in that: The front end inlet is connected to an intake pipe for discharging the mixed oil and gas into the front end inlet, and the intake pipe is provided with a docking flange connected to an external device; the intake pipe is arranged horizontally, and the inner side wall of the intake pipe is provided with a plurality of baffle plates made of metal for buffering the flow of the mixed oil and gas, and the plurality of baffle plates are arranged at intervals along the axial direction of the intake pipe.

9. The oil and gas defrosting recovery system based on a three-way valve according to claim 8, characterized in that: The plurality of blocking plates include a plurality of upper plates and a plurality of lower plates, the plurality of upper plates and the plurality of lower plates are arranged at intervals along the axial direction of the air intake pipe, and the upper plates and the lower plates are arranged alternately up and down, and the upper plates and the lower plates are arranged in an offset and overlapping manner up and down.

10. The oil and gas defrosting recovery system based on a three-way valve according to any one of claims 1 to 3, characterized in that: The tail end outlet is connected to an outlet pipe for discharging purified oil and gas, and a plurality of metal partition layers are arranged in the outlet pipe, and the plurality of partition layers are arranged at intervals along the axial direction of the outlet pipe; the outer periphery of the partition layer is butted against the inner wall of the outlet pipe, and along the flow direction of the purified oil and gas in the outlet pipe, the middle part of the partition layer is arranged to protrude forward, and the protrusion of the partition layer is in a conical shape, and a plurality of mesh holes are provided in the partition layer for the purified oil and gas to pass through.

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