Oil gas defrosting recovery system based on four-way valve

Abstract

The utility model relates to the technical field of oil gas recovery methods, and discloses an oil gas defrosting recovery system based on a four-way valve, which comprises a first heat exchange channel, a second heat exchange channel arranged in parallel with the first heat exchange channel, a head end four-way valve and a tail end four-way valve, a communication channel is connected between the head end four-way valve and the tail end four-way valve; in the process that the mixed oil gas is condensed and separated into purified oil gas and water through the first recovery channel, when the second heat exchange channel is frosted or frozen, the first recovery channel is closed, the second recovery channel is opened, and the second heat exchange channel is defrosted or deiced through the temperature of the mixed oil gas. The use flexibility and the application range are improved for a user, the oil gas recovery efficiency is higher, and meanwhile, the complexity, the failure rate and the maintenance cost of equipment can be reduced; the problem that the surface of the heat exchanger is frosted or frozen in the oil gas recovery process is solved.

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 four-way valve. Background Art

[0002] 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.

[0003] 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

[0004] The utility model aims to provide an oil and gas defrosting recovery system based on a four-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.

[0005] The utility model is implemented as follows: an oil and gas defrosting recovery system based on a four-way valve comprises a first heat exchange channel, a second heat exchange channel arranged in parallel with the first heat exchange channel, a head end four-way valve and a tail end four-way valve, wherein the first heat exchange channel and the second heat exchange channel are respectively provided with a heat exchanger for cooling or heating, the head end four-way valve has a head end inlet for mixed oil and gas to be discharged, and the tail end four-way valve has a tail end outlet for purified oil and gas to be discharged;

[0006] 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 four-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 four-way valve, and a connecting channel is connected between the head end four-way valve and the tail end four-way valve;

[0007] The head end inlet, the head end four-way valve, the first heat exchange passage, the tail end four-way valve, the connecting passage, the head end four-way valve, the second heat exchange passage, the tail end four-way valve and the tail end outlet are connected in sequence to form a first recovery passage for the mixed oil and gas to flow; the head end inlet, the head end four-way valve, the second heat exchange passage, the tail end four-way valve, the connecting passage, the head end four-way valve, the first heat exchange passage, the tail end four-way valve and the tail end outlet are connected in sequence to form a second recovery passage for the mixed oil and gas to flow;

[0008] 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 as to condense and separate the mixed oil and gas into purified oil and gas and water;

[0009] 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 started condensation state, so as to condense and separate the mixed oil and gas into purified oil and gas and water.

[0010] 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.

[0011] 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.

[0012] Furthermore, the first end inlet is in a normally open state.

[0013] Furthermore, the tail end outlet is in a normally open state.

[0014] Furthermore, the head end inlet is connected to an air intake pipe for discharging the mixed oil and gas, and the air intake pipe is provided with a head end flange connected to an external air intake device.

[0015] Furthermore, the tail outlet is connected to an outlet pipe for discharging purified oil and gas, and the outlet pipe is provided with a tail flange connected to an external air collecting device.

[0016] Furthermore, the connecting channel is arranged in a straight strip shape and is arranged between the first heat exchange channel and the second heat exchange channel.

[0017] Furthermore, an inner sleeve is provided inside the connecting channel, and an annular space is provided between the inner sleeve and the inner side wall of the connecting channel. A plurality of connecting plates are provided in the annular space, and the plurality of connecting plates are arranged around the circumference of the inner sleeve at intervals, and the plurality of connecting plates relatively fix the inner sleeve and the connecting channel.

[0018] Furthermore, the inner sleeve is provided with a plurality of inner through holes, and the interior of the inner sleeve is connected with the annular spacer through the plurality of inner through holes. During the flow of the mixed oil and gas in the connecting channel, the mixed oil and gas reciprocates between the inner sleeve and the annular spacer through the inner through holes.

[0019] Compared with the prior art, the oil and gas defrosting recovery system based on the four-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

[0020] Figure 1 It is a schematic diagram of the structural arrangement of the oil and gas defrosting recovery system based on the four-way valve provided by the utility model;

[0021] Figure 2 It is a schematic diagram of the flow structure arrangement of the first recovery channel provided by the utility model;

[0022] Figure 3 It is a schematic diagram of the flow structure arrangement of the second recovery channel provided by the utility model;

[0023] Figure 4 It is a schematic diagram of the flow structure arrangement of the second heat exchange channel provided by the utility model;

[0024] Figure 5 It is a schematic diagram of the flow structure arrangement of the first heat exchange channel provided by the utility model;

[0025] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting channel and the inner sleeve provided by the utility model.

[0026] In the figure: a first heat exchange channel 10, a second heat exchange channel 20, a head end four-way valve 30, a tail end four-way valve 40, a heat exchanger 50, a connecting channel 60, an air inlet pipe 31, a head end inlet 32, an air outlet pipe 41, a tail end outlet 42, an inner sleeve 61, an annular spacer 62, a connecting piece 63, and an inner through hole 64. DETAILED DESCRIPTION

[0027] 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.

[0028] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0029] 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.

[0030] Reference Figure 1-6 As shown, it is a preferred embodiment provided by the utility model.

[0031] The oil and gas defrosting recovery system based on the four-way valve comprises a first heat exchange channel 10, a second heat exchange channel 20 arranged in parallel with the first heat exchange channel 10, a head end four-way valve 30 and a tail end four-way valve 40, the first heat exchange channel 10 and the second heat exchange channel 20 are respectively provided with a heat exchanger 50 for cooling or heating, the head end four-way valve 30 has a head end inlet 32 ​​for the mixed oil and gas to be discharged, and the tail end four-way valve 40 has a tail end outlet 42 for the purified oil and gas to be discharged;

[0032] 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 four-way valve 30, and 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 four-way valve 40, and a connecting channel 60 is connected between the head end four-way valve 30 and the tail end four-way valve 40;

[0033] The head end inlet 32, the head end four-way valve 30, the first heat exchange passage 10, the tail end four-way valve 40, the connecting passage 60, the head end four-way valve 30, the second heat exchange passage 20, the tail end four-way valve 40 and the tail end outlet 42 are sequentially connected to form a first recovery passage for the mixed oil and gas to flow; the head end inlet 32, the head end four-way valve 30, the second heat exchange passage 20, the tail end four-way valve 40, the connecting passage 60, the head end four-way valve 30, the first heat exchange passage 10, the tail end four-way valve 40 and the tail end outlet 42 are sequentially connected to form a second recovery passage for the mixed oil and gas to flow;

[0034] 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 as to condense and separate the mixed oil and gas into purified oil and gas and water;

[0035] 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 started condensation state, so as to condense and separate the mixed oil and gas into purified oil and gas and water.

[0036] The above-mentioned oil and gas defrosting recovery system based on the four-way valve provides, 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 frosting or ice appears on the second heat exchange channel 20, 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 20, which improves the flexibility and application scope of use for users, makes the oil and gas recovery efficiency higher, 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.

[0037] A plurality of heat exchangers 50 are respectively disposed on the first heat exchange channel 10 and the second heat exchange channel 20 . 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 .

[0038] 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 .

[0039] The two heat exchangers 50 are used to cool the mixed oil and gas. 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.

[0040] The first end inlet is in the normally open state.

[0041] The tail outlet 42 is in a normally open state.

[0042] In this embodiment, the head end inlet is connected to an air intake pipe 31 for the mixed oil and gas to be discharged, and the air intake pipe 31 is provided with a head end flange connected to an external air intake device. In this way, it is convenient to disassemble and repair, and it is also convenient to replace the air intake pipe 31.

[0043] In this embodiment, the tail outlet 42 is connected to an outlet pipe 41 for discharging the purified oil and gas, and the outlet pipe 41 is provided with a tail flange connected to an external air collecting device. In this way, it is easy to disassemble and repair, and it is also easy to replace the outlet pipe 41.

[0044] In this embodiment, the connecting channel 60 is arranged in a straight strip shape and is arranged between the first heat exchange channel 10 and the second heat exchange channel 20. In this way, it is convenient for the mixed oil and gas to flow into the first heat exchange channel 10 or the second heat exchange channel 20 through the connecting channel, and the complexity, failure rate and maintenance cost of the equipment can also be reduced.

[0045] In this embodiment, an inner sleeve 61 is provided inside the connecting channel 60, and an annular spacer 62 is provided between the inner sleeve 61 and the inner side wall of the connecting channel 60. A plurality of connecting plates 63 are provided in the annular spacer 62. The plurality of connecting plates 63 are arranged around the circumferential intervals of the inner sleeve 61, and the plurality of connecting plates 63 relatively fix the inner sleeve 61 and the connecting channel 60.

[0046] The inner sleeve 61 is fixed in the connecting channel 60 by a plurality of connecting pieces 63 . The connecting channel 60 can separate the water in the mixed oil and gas by using the pipe wall of the inner sleeve 61 to obtain pure oil and gas.

[0047] In this embodiment, a plurality of inner through holes 64 are provided on the inner sleeve 61, and the interior of the inner sleeve 61 is connected with the annular spacer 62 through the plurality of inner through holes 64. When the mixed oil and gas flows in the connecting channel 60, the mixed oil and gas reciprocates between the inner sleeve 61 and the annular spacer 62 through the inner through holes 64.

[0048] The inner casing 61 utilizes a plurality of inner through holes 64 to allow the mixed oil and gas to reciprocate in series between the inner casing 61 and the annular spacer 62, so that more water in the mixed oil and gas can condense into liquid on the wall of the inner casing 61, thereby obtaining pure oil and gas.

[0049] 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 four-way valve is characterized by: The heat exchanger comprises a first heat exchange passage, a second heat exchange passage arranged in parallel with the first heat exchange passage, a head-end four-way valve and a tail-end four-way valve, wherein the first heat exchange passage and the second heat exchange passage are respectively provided with a heat exchanger for cooling or heating, the head-end four-way valve has a head-end inlet for the mixed oil and gas to be discharged, and the tail-end four-way valve has a tail-end outlet for the purified oil and gas to be discharged; 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 four-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 four-way valve, and a connecting channel is connected between the head end four-way valve and the tail end four-way valve; The head end inlet, the head end four-way valve, the first heat exchange passage, the tail end four-way valve, the connecting passage, the head end four-way valve, the second heat exchange passage, the tail end four-way valve and the tail end outlet are connected in sequence to form a first recovery passage for the mixed oil and gas to flow; the head end inlet, the head end four-way valve, the second heat exchange passage, the tail end four-way valve, the connecting passage, the head end four-way valve, the first heat exchange passage, the tail end four-way valve and the tail end outlet are connected in sequence to form a second recovery passage for the mixed oil and gas to flow; 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 as to condense and separate the mixed oil and gas 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 started condensation state, so as to condense and separate the mixed oil and gas into purified oil and gas and water.

2. The oil and gas defrosting recovery system based on a four-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 four-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 four-way valve according to claim 3, characterized in that: The first end inlet is in a normally open state.

5. The oil and gas defrosting recovery system based on a four-way valve according to claim 4, characterized in that: The tail end outlet is in a normally open state.

6. The oil and gas defrosting recovery system based on a four-way valve according to any one of claims 1 to 5, characterized in that: The head end inlet is connected to an air intake pipe for discharging the mixed oil and gas, and the air intake pipe is provided with a head end flange connected to an external air intake device.

7. The oil and gas defrosting recovery system based on a four-way valve according to claim 6, characterized in that: The tail end outlet is connected to an air outlet pipe for discharging purified oil and gas, and the air outlet pipe is provided with a tail end flange connected to an external air collecting device.

8. The oil and gas defrosting recovery system based on a four-way valve according to claim 7, characterized in that: The connecting channel is arranged in a straight strip shape and is arranged between the first heat exchange channel and the second heat exchange channel.

9. The oil and gas defrosting recovery system based on a four-way valve according to claim 8, characterized in that: An inner sleeve is provided inside the connecting channel, an annular space is provided between the inner sleeve and the inner side wall of the connecting channel, a plurality of connecting plates are provided in the annular space, and the plurality of connecting plates are arranged around the circumference of the inner sleeve at intervals, and the plurality of connecting plates relatively fix the inner sleeve and the connecting channel.

10. The oil and gas defrosting recovery system based on a four-way valve according to claim 9, characterized in that: The inner sleeve is provided with a plurality of inner through holes, and the interior of the inner sleeve is connected with the annular spacer through the plurality of inner through holes. When the mixed oil and gas flows in the connecting channel, the mixed oil and gas reciprocates between the inner sleeve and the annular spacer through the inner through holes.

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