Oil gas defrosting recovery system based on two-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 two-way valve, which comprises a first heat exchange channel and a second heat exchange channel arranged in parallel with the first heat exchange channel, and a first communication channel is arranged between the tail end of the first heat exchange channel and the head end of the second heat exchange channel. A first communicating two-way valve is arranged in the first communicating channel; the first heat exchange channel, the first communication channel and the second heat exchange channel are communicated in sequence to form a first recovery channel for mixed oil gas to flow; heat exchangers are respectively arranged on the first heat exchange channel and the second heat exchange channel; in the process of independently condensing and separating purified oil gas and water in the mixed oil gas through the first heat exchange channel, when the first heat exchange channel is frosted or frozen, the heat exchanger of the first heat exchange channel is closed, and the heat exchanger of the second heat exchange channel is started, so that the mixed oil gas flows in the first recovery channel; and the first heat exchange channel is defrosted or deiced by utilizing the temperature of the mixed oil gas, so that the oil gas recovery efficiency is higher, and meanwhile, the pipeline arrangement is simpler.

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 two-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 two-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 defrost recovery system based on a two-way valve comprises a first heat exchange channel and a second heat exchange channel arranged in parallel with the first heat exchange channel, wherein a first head-end two-way valve is provided at the head end of the first heat exchange channel, and a first tail-end two-way valve is provided at the tail end of the first heat exchange channel; a second head-end two-way valve is provided at the head end of the second heat exchange channel, and a second tail-end two-way valve is provided at the tail end of the second heat exchange channel;

[0006] A first connecting channel is provided between the tail end of the first heat exchange channel and the head end of the second heat exchange channel, and a first connecting two-way valve is provided in the first connecting channel; when the first head end two-way valve, the first connecting two-way valve and the second tail end two-way valve are in an open state, and the first tail end two-way valve and the second head end two-way valve are in a closed state, the first heat exchange channel, the first connecting channel and the second heat exchange channel are connected in sequence to form a first recovery channel for the mixed oil and gas to flow;

[0007] The first heat exchange channel and the second heat exchange channel are respectively provided with heat exchangers. When the mixed oil and gas flows in the first recovery channel, the heat exchanger of the first heat exchange channel is in a stopped condensation state, and the heat exchanger of the second heat exchange channel is in a started condensation state, so that the mixed oil and gas are condensed and separated to form purified oil and gas and water.

[0008] Furthermore, a second connecting channel is provided between the tail end of the second heat exchange channel and the head end of the first heat exchange channel, and a second connecting two-way valve is provided in the second connecting channel;

[0009] When the second head end two-way valve, the second connecting two-way valve and the first tail end two-way valve are in an open state, and the first head end two-way valve, the first connecting two-way valve and the second tail end two-way valve are in a closed state, the second heat exchange passage, the second connecting passage and the first heat exchange passage are connected in sequence to form a second recovery passage for the mixed oil and gas to flow;

[0010] When the mixed oil and gas flows in the second recovery channel, the heat exchanger of the second heat exchange channel is in a stopped condensation state, and the heat exchanger of the first heat exchange channel is in a started condensation state.

[0011] 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.

[0012] 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.

[0013] Further, when the first recycling path is in an open state, the second recycling path is in a closed state.

[0014] Further, when the second recycling path is in an open state, the first recycling path is in a closed state.

[0015] Furthermore, the head end of the first heat exchange channel and the head end of the second heat exchange channel are connected to form an air inlet for the mixed oil and gas to be discharged.

[0016] Furthermore, the air inlet is connected to an air inlet passage for discharging the mixed oil and gas, and a spiral wall is formed on the inner wall of the air inlet passage. The spiral wall is arranged to extend along the axial direction of the air inlet passage and spirally arranged along the circumference of the air inlet passage.

[0017] Furthermore, the tail end of the first heat exchange channel is connected to the tail end of the second heat exchange channel to form an outlet for the purified oil and gas to be discharged.

[0018] Furthermore, the gas outlet is connected to an outlet passage for discharging the purified oil and gas, and the inner side wall of the outlet passage is provided with a plurality of inclined plates made of metal, and the plurality of inclined plates are arranged opposite to each other up and down and are arranged at intervals along the axial direction of the outlet passage;

[0019] The outer end of the inclined piece is butted against the inner wall of the air outlet, the inner end of the inclined piece extends toward the middle of the air outlet, and the inclined piece is inclined along the flow direction of the purified oil and gas in the air outlet.

[0020] Compared with the prior art, the oil and gas defrosting recovery system based on a two-way valve provided by the utility model, when frosting or ice appears in the first heat exchange channel during the process of separately condensing and separating the purified oil and gas and water in the mixed oil and gas, the heat exchanger of the first heat exchange channel is closed, and the heat exchanger of the second heat exchange channel is started to allow the mixed oil and gas to flow in the first recovery channel, and the temperature of the mixed oil and gas itself is used to defrost or defrost the first heat exchange channel, thereby improving the flexibility and application scope of use for users, making the oil and gas recovery more efficient, and also reducing the complexity, failure rate and maintenance cost of the equipment, and making the pipeline layout simpler; solving 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

[0021] Figure 1 It is a schematic diagram of the structural arrangement of the oil and gas defrosting recovery system based on the two-way valve provided by the utility model;

[0022] Figure 2 It is a schematic diagram of the cutaway structure of the air intake duct provided by the utility model;

[0023] Figure 3 It is a schematic diagram of the cutaway structure of the air outlet provided by the utility model.

[0024] In the figure: the first heat exchange channel 10, the second heat exchange channel 20, the first connecting channel 30, the heat exchanger 40, the second connecting channel 50, the first head end two-way valve 11, the first tail end two-way valve 12, the air inlet channel 13, the spiral wall 14, the second head end two-way valve 21, the second tail end two-way valve 22, the air outlet channel 23, the inclined plate 24, the first connecting two-way valve 31, and the second connecting two-way valve 51. DETAILED DESCRIPTION

[0025] 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.

[0026] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0027] 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.

[0028] Reference Figure 1-3 As shown, it is a preferred embodiment provided by the utility model.

[0029] The oil and gas defrost recovery system based on the two-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, wherein a first head-end two-way valve 11 is provided at the head end of the first heat exchange channel 10, and a first tail-end two-way valve 12 is provided at the tail end of the first heat exchange channel 10; a second head-end two-way valve 21 is provided at the head end of the second heat exchange channel 20, and a second tail-end two-way valve 22 is provided at the tail end of the second heat exchange channel 20;

[0030] A first connecting passage 30 is provided between the tail end of the first heat exchange passage 10 and the head end of the second heat exchange passage 20, and a first connecting two-way valve 31 is provided in the first connecting passage 30; when the first head end two-way valve 11, the first connecting two-way valve 31 and the second tail end two-way valve 22 are in an open state, and the first tail end two-way valve 12 and the second head end two-way valve 21 are in a closed state, the first heat exchange passage 10, the first connecting passage 30 and the second heat exchange passage 20 are connected in sequence to form a first recovery passage for the mixed oil and gas to flow;

[0031] Heat exchangers 40 are provided on the first heat exchange channel 10 and the second heat exchange channel 20, respectively. When the mixed oil and gas flows in the first recovery channel, the heat exchanger 40 of the first heat exchange channel 10 is in a stopped condensation state, and the heat exchanger 40 of 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.

[0032] In the oil and gas defrosting recovery system based on the two-way valve provided above, when the first heat exchange channel 10 is frosted or frozen during the process of separately condensing and separating the purified oil and gas and water in the mixed oil and gas, the heat exchanger 40 of the first heat exchange channel 10 is closed, and the heat exchanger 40 of the second heat exchange channel 20 is started to allow the mixed oil and gas to flow in the first recovery channel, and the temperature of the mixed oil and gas itself is used to defrost or defrost the first heat exchange channel 10, thereby improving the flexibility and application scope of use for users, making the oil and gas recovery efficiency higher, and at the same time reducing the complexity, failure rate and maintenance cost of the equipment, and making the pipeline layout simpler; and solving the problem of frost or ice on the surface of the heat exchanger 40 during the oil and gas recovery process.

[0033] In this embodiment, a second connecting passage 50 is provided between the tail end of the second heat exchange passage 20 and the head end of the first heat exchange passage 10, and a second connecting two-way valve 51 is provided in the second connecting passage 50;

[0034] When the second head end two-way valve 21, the second connecting two-way valve 51 and the first tail end two-way valve 12 are in an open state, and the first head end two-way valve 11, the first connecting two-way valve 31 and the second tail end two-way valve 22 are in a closed state, the second heat exchange passage 20, the second connecting passage 50 and the first heat exchange passage 10 are connected in sequence to form a second recovery passage for the mixed oil and gas to flow;

[0035] When the mixed oil and gas flows in the second recovery channel, the heat exchanger 40 of the second heat exchange channel 20 is in a stopped condensation state, and the heat exchanger 40 of the first heat exchange channel 10 is in a started condensation state.

[0036] When the second heat exchange channel 20 is frosted or iced during the process of condensing and separating the purified oil and gas and water in the mixed oil and gas, the heat exchanger 40 of the second heat exchange channel 20 is closed, and the heat exchanger 40 of the first heat exchange channel 10 is started to allow the mixed oil and gas to flow in the second recovery channel, and the temperature of the mixed oil and gas itself is used to defrost or defrost the second heat exchange channel 20;

[0037] When the mixed oil and gas flows in the first recovery channel, if frost or ice appears in the second heat exchange channel 20, the first recovery channel can be closed and the second recovery channel can be opened to allow the mixed oil and gas to flow in the second recovery channel, and the temperature of the mixed oil and gas itself can be used to defrost or defrost the second heat exchange channel 20;

[0038] When the mixed oil and gas flows in the second recovery channel, if frost or ice appears on the first heat exchange channel 10, the second recovery channel can be closed and the first recovery channel can be opened to allow the mixed oil and gas to flow in the first recovery channel, and the temperature of the mixed oil and gas itself can be used to defrost or defrost the first heat exchange channel 10;

[0039] The above embodiments improve the flexibility and application scope of the use for the user, make the oil and gas recovery efficiency higher, and can also reduce the complexity, failure rate and maintenance cost of the equipment, and also make the pipeline layout more concise; and solve the problem of frost or ice on the surface of the heat exchanger 40 during the oil and gas recovery process.

[0040] In this embodiment, a plurality of heat exchangers 40 are respectively disposed on the first heat exchange channel 10 and the second heat exchange channel 20 , and the plurality of heat exchangers 40 are sequentially connected and arranged along the first heat exchange channel 10 or the second heat exchange channel 20 .

[0041] Two heat exchangers 40 are respectively disposed on the first heat exchange channel 10 and the second heat exchange channel 20 . The two heat exchangers 40 are sequentially connected and arranged along the first heat exchange channel 10 or the second heat exchange channel 20 .

[0042] The two heat exchangers 40 are used to cool the mixed oil and gas. The first heat exchanger 40 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 40 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.

[0043] When the first recycling channel is in an open state, the second recycling channel is in a closed state, so as to avoid mixed oil and gas cross-flow, resulting in insignificant defrosting or de-icing effects.

[0044] When the second recycling channel is in an open state, the first recycling channel is in a closed state, so as to avoid mixed oil and gas cross-flow, resulting in insignificant defrosting or ice-melting effects.

[0045] In this embodiment, the head end of the first heat exchange channel 10 and the head end of the second heat exchange channel 20 are connected to form an air inlet for the mixed oil and gas to be discharged.

[0046] The air inlet is connected to an air inlet passage 13 for discharging mixed oil and gas. A spiral wall 14 is formed on the inner wall of the air inlet passage 13 . The spiral wall 14 is arranged to extend along the axial direction of the air inlet passage 13 and spirally arranged along the circumference of the air inlet passage 13 .

[0047] The spiral wall 14 is used to increase the contact area between the mixed oil and gas and the intake passage 13 during the flow process, and to increase the flow time of the mixed oil and gas, that is, to buffer the mixed oil and gas, so that the spiral wall 14 is used to condense the water in the mixed oil and gas.

[0048] In this embodiment, the tail end of the first heat exchange channel 10 and the tail end of the second heat exchange channel 20 are connected to form an outlet for the purified oil and gas to be discharged.

[0049] The gas outlet is connected to an outlet duct 23 for discharging purified oil and gas. The inner wall of the outlet duct 23 is provided with a plurality of inclined plates 24 made of metal. The plurality of inclined plates 24 are arranged opposite to each other up and down and are arranged at intervals along the axial direction of the outlet duct 23.

[0050] The outer end of the inclined sheet 24 is butted against the inner wall of the outlet duct 23 , the inner end of the inclined sheet 24 extends toward the middle of the outlet duct 23 , and the inclined sheet 24 is inclined along the flow direction of the purified oil and gas in the outlet duct 23 .

[0051] The outlet duct 23 uses a plurality of inclined plates 24 to block the flow of the mixed oil and gas, to buffer the mixed oil and gas, and to condense the water in the mixed oil and gas through the plurality of inclined plates 24, so that the vapor water in the mixed oil and gas forms a liquid water.

[0052] 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 a two-way valve is characterized by: The heat exchange channel comprises a first heat exchange channel and a second heat exchange channel arranged in parallel with the first heat exchange channel, wherein the first heat exchange channel is provided with a first first end two-way valve at the head end, and the first heat exchange channel is provided with a first tail end two-way valve at the tail end; the second heat exchange channel is provided with a second first end two-way valve at the head end, and the second heat exchange channel is provided with a second tail end two-way valve at the tail end; A first connecting channel is provided between the tail end of the first heat exchange channel and the head end of the second heat exchange channel, and a first connecting two-way valve is provided in the first connecting channel; when the first head end two-way valve, the first connecting two-way valve and the second tail end two-way valve are in an open state, and the first tail end two-way valve and the second head end two-way valve are in a closed state, the first heat exchange channel, the first connecting channel and the second heat exchange channel are connected in sequence to form a first recovery channel for the mixed oil and gas to flow; The first heat exchange channel and the second heat exchange channel are respectively provided with heat exchangers. When the mixed oil and gas flows in the first recovery channel, the heat exchanger of the first heat exchange channel is in a stopped condensation state, and the heat exchanger of the second heat exchange channel is in a started condensation state, so that the mixed oil and gas are condensed and separated to form purified oil and gas and water.

2. The oil and gas defrosting recovery system based on a two-way valve according to claim 1, characterized in that: A second connecting passage is provided between the tail end of the second heat exchange passage and the head end of the first heat exchange passage, and a second connecting two-way valve is provided in the second connecting passage; When the second head end two-way valve, the second connecting two-way valve and the first tail end two-way valve are in an open state, and the first head end two-way valve, the first connecting two-way valve and the second tail end two-way valve are in a closed state, the second heat exchange passage, the second connecting passage and the first heat exchange passage are connected in sequence to form a second recovery passage for the mixed oil and gas to flow; When the mixed oil and gas flows in the second recovery channel, the heat exchanger of the second heat exchange channel is in a stopped condensation state, and the heat exchanger of the first heat exchange channel is in a started condensation state.

3. The oil and gas defrosting recovery system based on a two-way valve according to claim 2, 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.

4. The oil and gas defrosting recovery system based on a two-way valve according to claim 3, 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.

5. The oil and gas defrosting recovery system based on a two-way valve according to claim 4, characterized in that: When the first recycling path is in an open state, the second recycling path is in a closed state.

6. The oil and gas defrosting recovery system based on a two-way valve according to claim 5, characterized in that: When the second recycling path is in an open state, the first recycling path is in a closed state.

7. The oil and gas defrosting recovery system based on a two-way valve according to any one of claims 1 to 6, characterized in that: The head end of the first heat exchange channel and the head end of the second heat exchange channel are connected to form an air inlet for the mixed oil and gas to be discharged.

8. The oil and gas defrosting recovery system based on a two-way valve according to claim 7, characterized in that: The air inlet is connected to an air inlet passage for discharging mixed oil and gas. The inner wall of the air inlet passage is formed with a spiral wall. The spiral wall is arranged to extend along the axial direction of the air inlet passage and spirally arranged along the circumference of the air inlet passage.

9. The oil and gas defrosting recovery system based on a two-way valve according to claim 8, characterized in that: The tail end of the first heat exchange channel is connected to the tail end of the second heat exchange channel to form an outlet for the purified oil and gas to be discharged.

10. The oil and gas defrosting recovery system based on a two-way valve according to claim 9, characterized in that: The gas outlet is connected to an outlet passage for discharging purified oil and gas, and the inner side wall of the outlet passage is provided with a plurality of inclined plates made of metal, and the plurality of inclined plates are arranged opposite to each other up and down and spaced apart along the axial direction of the outlet passage; The outer end of the inclined piece is butted against the inner wall of the air outlet, the inner end of the inclined piece extends toward the middle of the air outlet, and the inclined piece is inclined along the flow direction of the purified oil and gas in the air outlet.

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