Oil gas recycling machine capable of enhancing heat exchange effect

Abstract

The utility model relates to an oil gas recycling machine capable of enhancing a heat exchange effect, which belongs to the field of oil gas recycling and comprises a conveying pipeline, a condensing and liquefying device, a separator and a refrigerating device, the conveying pipeline comprises a gas inlet pipe and a gas outlet pipe, and the gas inlet pipe conveys waste gas into the condensing and liquefying device; the refrigerating device is used for cooling the condensing and liquefying device layer by layer, so that the waste gas is condensed stage by stage; a separator connected to the condensing and liquefying device is used for separating and recycling condensed liquid, a heat exchanger is arranged at the position, close to condensed liquefied gas, of the conveying pipeline, and the heat exchanger comprises a shell, a first pipeline and a second pipeline; two ends of the first pipeline are respectively connected with the air outlet pipe; the two ends of the second pipeline are connected to the air inlet pipe, and the radial section of the second pipeline is in a regular polygon shape. The second pipeline is located in the first pipeline, and the first pipeline and the second pipeline are arranged in an orthogonal mode. The heat exchanger has the effects of enhancing the heat exchange effect and reducing the cost.

Description

Technical Field

[0001] The present application relates to the field of oil and gas recovery, and in particular to an oil and gas recovery machine with enhanced heat exchange effect. Background Art

[0002] Styrene is an organic compound formed by replacing one hydrogen atom of ethylene with benzene. It is insoluble in water but soluble in ethanol and ether. It gradually polymerizes and oxidizes when exposed to air. It is an important monomer commonly used in the industry to synthesize plastics and rubber products. The styrene produced during the production process is highly toxic and has a foul odor, which affects the environment and human health. Therefore, the waste gas of styrene during the production process must be treated to meet the atmospheric emission standards.

[0003] At present, the common treatment method is to separate the styrene in the waste gas by condensation. The principle of condensation recovery is to reduce the temperature of the styrene waste gas so that the styrene condenses into liquid, thereby separating it for recovery. The condensation and liquefaction recovery device includes a separator, two condensers and liquefiers, and a three-stage refrigeration part. The cooling capacity of the first-stage refrigeration part is divided into two paths, one entering the first condenser and liquefier, and the other entering the separator; the cooling capacity of the second-stage refrigeration part is divided into two paths, one entering the second condenser and liquefier, and the other entering the waste gas heat exchange separator; the cooling capacity of the third-stage refrigeration part directly enters the waste gas heat exchange separator. The waste gas is recovered by pure condensation method. After condensation and liquefaction, the waste gas is directly recycled as gasoline. At the same time, the compressor double parallel cascade refrigeration technology is adopted. The condensation is graded at a higher evaporation temperature. The front-stage refrigeration part provides a low-temperature environment for heat replacement for the rear-stage refrigeration and waste gas cooling and graded condensation. It has the advantages of energy saving, environmental protection, low cost and easy operation and maintenance.

[0004] In view of the above-mentioned related technologies, low-temperature condensation and liquefaction technology is used to treat styrene waste gas, and the low-temperature waste gas is discharged after reaching the emission standard, resulting in a certain amount of equipment idleness and waste. Utility Model Content

[0005] In order to enhance the heat exchange effect and reduce costs, the present application provides an oil and gas recovery machine with enhanced heat exchange effect.

[0006] The oil and gas recovery machine provided in the present application for enhancing the heat exchange effect adopts the following technical solution:

[0007] A gas recovery machine with enhanced heat exchange effect, comprising a conveying pipeline, a condensation and liquefaction device, a separator and a refrigeration device; the conveying pipeline comprises an air inlet pipe and an air outlet pipe, the air inlet pipe conveys the exhaust gas to the inside of the condensation and liquefaction device for cooling; the refrigeration device reduces the temperature of the condensation and liquefaction device layer by layer, so that the exhaust gas is condensed in stages inside the condensation and liquefaction device; the separator is connected to the condensation and liquefaction device, and the separator separates and recovers the liquid at the condensation point in the condensation and liquefaction device, and the recovered exhaust gas is output through the air outlet pipe; a heat exchanger is arranged on the conveying pipeline near the position of the condensation and liquefaction gas, and the heat exchanger comprises a shell, a first pipeline and a second pipeline; the air outlet pipe is connected to the first pipeline; the air inlet pipe is connected to the second pipeline, and the cross-section of the second pipeline is a regular polygon; the second pipeline is located in the first pipeline, and the first pipeline and the second pipeline are arranged orthogonally.

[0008] By adopting the above technical solution, the collected exhaust gas at room temperature enters the second pipe of the heat exchanger through the air inlet pipe. At the same time, the exhaust gas treated by the condensation and liquefaction device enters the first pipe of the heat exchanger through the air outlet pipe. The temperature of the exhaust gas treated by the condensation and liquefaction device is much lower than the exhaust gas at room temperature. The temperature of the first pipe is lower than the temperature in the second pipe. The heat in the second pipe is transferred to the first pipe with lower temperature through the pipe wall of the second pipe, thereby reducing the temperature of the exhaust gas at room temperature in the second pipe. The polygonal cross-section of the second pipe effectively increases the heat exchange area between the second pipe and the first pipe, improves the heat exchange effect, and effectively reduces the temperature of the exhaust gas in the second pipe. The exhaust gas at room temperature enters the condensation and liquefaction device after pre-cooling through the heat exchanger. After being treated by the condensation and liquefaction device, the exhaust gas reaches the atmospheric emission standard and is discharged through the air outlet pipe.

[0009] Optionally, the second pipes are arranged in multiple groups in an array along the length direction of the first pipe.

[0010] By adopting the above technical solution, multiple groups of second pipes are arranged in an array, which increases the heat exchange area between the first pipes and the second pipes and improves the overall heat dissipation effect.

[0011] Optionally, the cross-sectional dimensions of each group of second pipes not connected to the air intake pipe are arranged to increase from top to bottom.

[0012] By adopting the above technical solution, the cross-sectional dimensions of the second pipes increase from top to bottom, ensuring that the exhaust gas at room temperature can evenly pass through the remaining groups of second pipes after entering the heat exchanger through the top group of second pipes, thereby improving the overall heat dissipation effect.

[0013] Optionally, a plurality of fin plates are fixed on the inner wall of the second pipe, the fin plates are perpendicular to the inner wall of the pipe, and the fin plates are arranged along the length direction of the second pipe.

[0014] By adopting the above technical solution, the fin plate increases the contact area between the second pipe and the internal flow of the normal temperature exhaust gas, thereby increasing the heat exchange efficiency of the second pipe.

[0015] Optionally, the fins in the same second pipe extend in a direction away from the inner wall of the second pipe and abut against each other.

[0016] By adopting the above technical solution, the mutually abutting fin plates enhance the overall structural strength of the second pipe, and the structure is simple and easy to manufacture.

[0017] Optionally, the sum of the cross-sectional areas of the second pipes is greater than the cross-sectional area of ​​the first pipes.

[0018] By adopting the above technical solution, the sum of the cross-sectional areas of the second pipe is greater than the sum of the cross-sectional areas of the first pipe, and the flow velocity in the second pipe is smaller than the flow velocity in the first pipe, thereby ensuring the heat exchange effect of the normal temperature exhaust gas flowing in the second pipe.

[0019] Optionally, the second pipe is made of copper or aluminum.

[0020] By adopting the above technical solution, copper and aluminum both have good heat transfer characteristics and thermal conductivity coefficients, and are easy to manufacture and process, thereby effectively improving the heat exchange effect of the second pipeline.

[0021] Optionally, the cup wall of the heat exchanger shell is provided with a thermal insulation layer, and the thermal insulation layer is arranged in close contact with the inner wall of the shell.

[0022] By adopting the above technical solution, the thermal insulation layer can effectively isolate the heat exchange between the inside and outside of the heat exchanger, thereby ensuring the heat exchange effect inside the heat exchanger.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The temperature of the waste gas after being treated by the condensation and liquefaction device is much lower than the waste gas at normal temperature. The temperature of the first pipe is lower than the temperature in the second pipe. The heat in the second pipe is transferred to the first pipe with lower temperature through the pipe wall of the second pipe, thereby reducing the temperature of the waste gas at normal temperature in the second pipe. The polygonal cross section of the second pipe effectively increases the heat exchange area between the second pipe and the first pipe, improves the heat exchange effect, and effectively reduces the temperature of the waste gas in the second pipe;

[0025] 2. The cross-sectional dimensions of the second pipes increase from top to bottom, ensuring that the exhaust gas at room temperature can evenly pass through the remaining groups of second pipes after entering the heat exchanger through the top group of second pipes, thereby improving the overall heat dissipation effect;

[0026] 3. Both copper and aluminum have good heat transfer characteristics and thermal conductivity, and are easy to manufacture and process, effectively improving the heat exchange effect of the second pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an oil and gas recovery machine with enhanced heat exchange effect according to an embodiment of the present application;

[0028] Figure 2 is a cross-sectional view of a protruding first pipeline of an oil and gas recovery machine for enhancing heat exchange effect according to an embodiment of the present application;

[0029] Figure 3 It is a cross-sectional view of a protruding second pipe of an oil and gas recovery machine for enhancing heat exchange effect according to an embodiment of the present application.

[0030] Explanation of the reference numerals: 1. conveying pipeline; 11. air inlet pipe; 12. air outlet pipe; 2. heat exchanger; 21. first pipeline; 22. second pipeline; 221. fin plate; 23. outer shell; 231. insulation layer; 3. condensation and liquefaction device; 4. refrigeration device; 5. separator. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] The present application embodiment discloses a condensation and liquefaction device with heat exchange. Figure 1An oil and gas recovery machine with enhanced heat exchange effect includes a conveying pipeline 1, a condensation and liquefaction device 3, a separator 5 and a refrigeration device 4. The conveying pipeline 1 is connected to the condensation and liquefaction device 3 and conveys the exhaust gas to the inside of the condensation and liquefaction device 3 for cooling. The refrigeration device 4 is installed above the refrigeration device 4, and the refrigeration device 4 lowers the temperature of the condensation and liquefaction device 3 layer by layer, so that the exhaust gas is graded and condensed inside the condensation and liquefaction device 3. The separator 5 is connected to the condensation and liquefaction device 3, and the separator 5 separates and recovers the liquid at the condensation point in the condensation and liquefaction device 3. The conveying pipeline 1 includes an air inlet pipe 11 and an air outlet pipe 12. One end of the air inlet pipe 11 is connected to one end of the air inlet of the condensation and liquefaction device 3, and the air inlet pipe 11 conveys the exhaust gas to be treated to the condensation and liquefaction device 3. One end of the air outlet pipe 12 is connected to one end of the air outlet of the condensation and liquefaction device 3, and the air outlet pipe 12 outputs the low-temperature gas treated by the condensation and liquefaction device 3.

[0035] refer to Figure 1-3 , a heat exchanger 2 is installed at a position of the conveying pipeline 1 near the condensation liquefaction device 3. The heat exchanger 2 is fixedly connected with an air inlet pipe 11 at both ends along the width direction, and the heat exchanger 2 shell 23 is fixedly connected with an air outlet pipe 12 at both ends along the length direction. The heat exchanger 2 includes a shell 23, a first pipe 21 and a second pipe 22. The shell 23 of the heat exchanger 2 is in a cubic shape, and a heat insulation layer 231 is fixedly connected to the inner wall of the shell 23 of the heat exchanger 2, and the heat insulation layer 231 completely covers the inner wall of the shell 23, and the heat insulation layer 231 completely seals the shell 23 of the heat exchanger 2. The heat insulation layer 231 is made of a heat insulation material, and the heat insulation layer 231 can effectively isolate the heat exchange between the inside and the outside of the heat exchanger 2.

[0036] refer to Figure 2 and reference Figure 3 The heat exchanger 2 is fixed with a first pipe 21 and a second pipe 22. The first pipe 21 is respectively provided at two ends corresponding to the positions of the outlet pipe 12 through the housing 23 and connected to the outlet pipe 12. The second pipe 22 is provided at two ends corresponding to the positions of the inlet pipe 11 through the housing 23 and connected to the inlet pipe 11.

[0037] refer to Figure 2 and reference Figure 3, the first pipe 21 is vertically arranged inside the heat exchanger 2, and the horizontal cross-section of the first pipe 21 is rectangular. The outlet pipe 12 is respectively arranged in the outer shell 23 and the insulation layer 231 of the heat exchanger 2 and is respectively connected to the two ends of the first pipe 21 in the vertical direction. The outlet pipe 12 and the connecting port of the first pipe 21 are in the same vertical plane and are arranged far away from each other. The exhaust gas treated by the condensation and liquefaction device 3 enters the first pipe 21 through the outlet pipe 12. The air inlet and the air outlet of the outlet pipe 12 are arranged far away from each other, which slows down the flow rate of the exhaust gas in the first pipe 21 and prolongs the circulation time of the exhaust gas in the first pipe 21. The second pipe 22 is fixedly connected to the inside of the first pipe 21, and the second pipe 22 is arranged orthogonally to the first pipe 21. The two ends of the first pipe 21 are arranged to penetrate the pipe wall of the second pipe 22. The first pipe 21 is perpendicular to the second pipe 22 and is in contact with the insulation layer 231 of the inner wall of the heat exchanger 2 on both sides in the length direction. The first pipe 21 is separated from the inner wall of the heat exchanger 2 by a cavity on both sides in the length direction of the second pipe 22. The vertical cross section of the second pipe 22 is a regular polygon, which can be a regular triangle, a regular quadrilateral, a regular pentagon, a regular hexagon, etc. The polygonal cross section of the second pipe 22 effectively increases the heat exchange area between the second pipe 22 and the first pipe 21, improves the heat exchange effect, and effectively reduces the temperature of the exhaust gas in the second pipe 22.

[0038] refer to Figure 2 and reference Figure 3 , multiple groups of second pipes 22 are arranged in an array along the vertical direction, and each group of second pipes 22 is arranged parallel to each other. Each group of second pipes 22 is arranged closely to each other. Multiple groups of second pipes 22 are arranged in parallel to each other, and multiple groups of second pipes 22 are arranged in an array along the same horizontal plane. The top and bottom two groups of second pipes 22 extend in opposite directions and penetrate the outer shell 23 and the insulation layer 231 respectively. The two groups of second pipes 22 are respectively fixed and connected to the intake pipe 11, so that the exhaust gas at normal temperature enters the heat exchanger 2 through the top group of second channels, and finally flows out through the bottom group of second channels in the opposite direction, which prolongs the residence time of the exhaust gas at normal temperature in the heat exchanger 2, enhances the cooling effect of the exhaust gas at normal temperature, and improves the cooling effect of the heat exchanger 2 at the same time. The vertical cross-sectional dimensions of the remaining groups of second pipes 22 not connected to the air intake pipe 11 increase from top to bottom, ensuring that the exhaust gas at room temperature can evenly pass through the remaining groups of second pipes 22 after entering the heat exchanger 2 through the top group of second pipes 22, thereby improving the overall heat dissipation effect.

[0039] refer to Figure 2 and reference Figure 3As a further example under this embodiment, the second pipe 22 is made of copper or aluminum. Copper has good heat transfer characteristics and thermal conductivity, and is easy to manufacture and process. The second pipe 22 is made of copper, which effectively improves the heat exchange effect of the second pipe 22. Aluminum is used as the material for making the second pipe 22. Aluminum has good heat transfer effect and is very light, which reduces the overall weight of the heat exchanger 2.

[0040] refer to Figure 2 and reference Figure 3 As a further example under this embodiment, a plurality of fins 221 are fixedly connected to the inner wall of each second pipe 22, and the fins 221 correspond to the inner wall plane of the second pipe 22 one by one. The fins 221 are arranged perpendicular to the inner wall of the second pipe 22, and the fins 221 are arranged along the length direction of the second pipe 22, and the length of the fins 221 is the same as the length of the second pipe 22. The fins 221 and the second pipe 22 are made of the same material, and the fins 221 increase the contact area between the second pipe 22 and the internal flow of the constant temperature exhaust gas, thereby increasing the heat exchange efficiency of the second pipe 22. The fins 221 in the same second pipe 22 extend away from the inner wall, so that the fins 221 in the same second pipe 22 abut against each other and are fixed together. The mutually abutting fins 221 enhance the overall structural strength of the second pipe 22, and the structure is simple and easy to manufacture.

[0041] refer to Figure 2 and reference Figure 3 As a further example of this embodiment, the sum of the cross-sectional areas of the second pipe 22 is greater than the sum of the cross-sectional areas of the first pipe 21, and the flow velocity in the second pipe 22 is less than the flow velocity in the first pipe 21, thereby ensuring the heat exchange effect of the normal temperature exhaust gas flowing in the second pipe 22.

[0042] The implementation principle of an oil and gas recovery machine for enhancing heat exchange effect in the embodiment of the present application is as follows: the collected exhaust gas at room temperature enters the second pipe 22 of the heat exchanger 2 through the air inlet pipe 11. At the same time, the exhaust gas treated by the condensation and liquefaction device 3 enters the first pipe 21 of the heat exchanger 2 through the air outlet pipe 12. The temperature of the exhaust gas treated by the condensation and liquefaction device 3 is much lower than the exhaust gas at room temperature. The temperature of the first pipe 21 is lower than the temperature in the second pipe 22. The heat in the second pipe 22 is transferred to the first pipe 21 with lower temperature through the wall of the second pipe 22, thereby reducing the temperature of the exhaust gas at room temperature in the second pipe 22. The exhaust gas at room temperature enters the condensation and liquefaction device 3 after pre-cooling through the heat exchanger 2. After the exhaust gas is treated by the condensation and liquefaction device 3 and reaches the atmospheric emission standard, it is discharged through the air outlet pipe 12.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An oil and gas recovery machine with enhanced heat exchange effect, comprising a conveying pipeline (1), a condensation and liquefaction device (3), a separator (5) and a refrigeration device (4); the conveying pipeline (1) comprises an air inlet pipe (11) and an air outlet pipe (12), the air inlet pipe (11) conveys the waste gas to the inside of the condensation and liquefaction device (3) for cooling; the refrigeration device (4) cools the condensation and liquefaction device (3) layer by layer, so that the waste gas is condensed in stages inside the condensation and liquefaction device (3); the separator (5) is connected to the condensation and liquefaction device (3), the separator (5) separates and recovers the liquid condensed in the condensation and liquefaction device (3), and the recovered waste gas is output through the air outlet pipe (12), characterized in that: A heat exchanger (2) is arranged on the conveying pipeline (1) near the position of condensing liquefied gas, and the heat exchanger (2) comprises a shell (23), a first pipeline (21) and a second pipeline (22); the outlet pipe (12) is connected to the first pipeline (21); the inlet pipe (11) is connected to the second pipeline (22), and the cross-section of the second pipeline (22) is a regular polygon; the second pipeline (22) is located in the first pipeline (21), and the first pipeline (21) and the second pipeline (22) are arranged orthogonally.

2. The oil and gas recovery machine with enhanced heat exchange effect according to claim 1, characterized in that: The second pipes (22) are arranged in a plurality of groups in an array along the length direction of the first pipe (21).

3. The oil and gas recovery machine with enhanced heat exchange effect according to claim 2, characterized in that: The cross-sectional dimensions of each group of second pipes (22) not connected to the air intake pipe (11) are arranged to increase from top to bottom.

4. The oil and gas recovery machine with enhanced heat exchange effect according to claim 2, characterized in that: A plurality of fin plates (221) are fixed on the inner wall of the second pipe (22), the fin plates (221) are perpendicular to the inner wall of the pipe, and the fin plates (221) are arranged along the length direction of the second pipe (22).

5. The oil and gas recovery machine with enhanced heat exchange effect according to claim 4, characterized in that: The fin plates (221) in the same second pipe (22) extend in a direction away from the inner wall of the second pipe (22) and abut against each other.

6. The oil vapor recovery machine with enhanced heat exchange effect according to claim 5, characterized in that: The sum of the cross-sectional areas of all the second pipes (22) is greater than the cross-sectional area of ​​the first pipe (21).

7. The oil and gas recovery machine with enhanced heat exchange effect according to claim 2, characterized in that: The second pipe (22) is made of copper or aluminum.

8. The oil and gas recovery machine with enhanced heat exchange effect according to claim 1, characterized in that: The inner wall of the outer shell (23) of the heat exchanger (2) is provided with a thermal insulation layer (231), and the thermal insulation layer (231) is arranged in close contact with the inner wall of the outer shell (23).

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