A pre-cooling structure for associated gas recovery

Abstract

The utility model relates to a kind of front precooling structure for associated gas recovery, including the precooling shell that can directional delivery gas, the first heat exchange shell that can be cooperated with its top surface cover and form upper cooling fluid flow chamber is equipped, on the precooling shell, several shunt vertical pipes are inserted in staggered array according to the mode of penetrating its shell cavity and not being communicated with its shell cavity, and the second heat exchange shell of the lower cooling fluid flow chamber that can be communicated with the first heat exchange shell by shunt vertical pipe is also buckled on the bottom surface of the precooling shell, the bottom of the second heat exchange shell is also provided with the overhanging support that can suspend it and the flow guide fan of arranging at the both sides of the overhanging support.The utility model can carry out front precooling to associated gas when output in oilfield exploitation, and reduce the initial temperature and promote gas initial density and later-stage compression efficiency of gas.

Description

Technical Field

[0001] This utility model relates to the technical field of gas precooling equipment, and in particular to a pre-cooling structure for associated gas recovery. Background Technology

[0002] Associated gas from oil fields, also known as associated gas, is a mixture of flammable gases that leak out along with crude oil during oil extraction. Its components typically include methane, ethane, propane, and butane. Due to the complexity of its recovery and reuse processes and the inability to directly emit it, coupled with previously lower environmental regulations, most oil fields directly burned and emitted associated gas. This combustion caused severe environmental pollution, resulting in significant energy waste and the emission of large amounts of greenhouse gases. Currently, the main technology used for recovering associated gas from oil fields involves compression and condensation. After condensation, a mixed hydrocarbon product is directly obtained. Depending on the process route, the compression pressure and condensation temperature vary. Associated gas has a low initial pressure (typically 0.1-0.3 MPa) and a large volume, requiring substantial space for direct storage. Compression significantly reduces the gas volume, facilitating subsequent storage and transportation. For example, associated gas from oil fields needs to be compressed before entering the condensation stage to create conditions for liquefaction or pipeline transportation. Currently, to facilitate and improve the efficiency of subsequent recovery processes, gas compression systems are typically used to increase gas density, thereby improving the efficiency and quality of associated gas and drilling gas storage and transportation. Furthermore, the high-pressure compressed gas facilitates subsequent condensation for liquid hydrocarbon recovery. Existing processing equipment usually directly introduces associated gas or drilling gas into the gas compression system, where the gas is first pressurized to approximately 1.5-1.6 MPa by compression equipment (such as a centrifugal air compressor) to increase its density.

[0003] However, existing compression systems typically lack modules for pre-cooling the intake gas, making it impossible to ensure that the initial temperature of the extracted specialty gas is at a low level during high-temperature periods such as summer and in special environments. As a result, when the temperature of the gas intake is high, the density of associated gases and other gases decreases significantly, resulting in a smaller mass of gas entering the compressor for the same volume. This reduces the actual discharge capacity of the compressor to some extent. Furthermore, high-temperature gas increases the compression difficulty and heat generation during operation, requiring the compressor to operate under higher industrial control conditions to ensure the compression discharge capacity. This leads to increased energy consumption and difficulty in the entire compression process and also increases the burden on the compressor cooling module. Utility Model Content

[0004] The purpose of this invention is to provide a pre-cooling structure for associated gas recovery that can pre-cool the associated gas output during oilfield extraction to reduce the initial temperature of the gas and increase its initial density and subsequent compression efficiency. This solves the problem that the gas compression device of the existing associated gas recovery system does not have a gas pre-cooling structure on the inlet side, and the associated gas it draws in comes directly from deep underground and has a high temperature, which increases the difficulty and energy consumption of gas compression, resulting in poor compression efficiency and reduced efficiency of subsequent associated gas storage and transfer.

[0005] The technical solution adopted by this utility model is as follows: a pre-cooling structure for associated gas recovery, including a pre-cooling shell capable of directional gas delivery, a first heat exchange shell covering the top surface of the pre-cooling shell to form an upper coolant guide chamber, a plurality of diversion vertical pipes being staggered and arrayed on the pre-cooling shell in a manner that penetrates its shell cavity but does not communicate with its shell cavity, and a second heat exchange shell being fastened to the bottom surface of the pre-cooling shell, which can communicate with the first heat exchange shell through the diversion vertical pipes, forming a lower coolant guide chamber, and the bottom of the second heat exchange shell is also provided with a suspended support capable of suspending and supporting it, and guide fans arranged on both sides of the suspended support.

[0006] According to a preferred embodiment, the inclined lower end of the inclined heat exchange flat shell of the precooling shell is connected to an extension tube, and the inlet end of the extension tube away from the inclined heat exchange flat shell is connected to an air inlet head; the inclined upper end of the inclined heat exchange flat shell is connected to a manifold, and the end of the manifold away from the inclined heat exchange flat shell is connected to an air outlet head.

[0007] According to a preferred embodiment, the inclined heat exchange flat shell includes a thick frame and an upper heat exchange plate and a lower heat exchange plate covering the top and bottom of the thick frame. A diversion rod capable of secondary diversion of directional airflow is longitudinally inserted into two opposing inner surfaces of the thick frame. A plurality of diversion vertical pipes are arranged in a staggered array within the frame cavity of the thick frame, and the upper and lower axial ends of the diversion vertical pipes are respectively inserted into the upper and lower heat exchange plates through the plate walls.

[0008] According to a preferred embodiment, heat dissipation fins are spaced apart on the outer surfaces of the two side frame walls on which the diversion longitudinal rods are inserted into the thick frame.

[0009] According to a preferred embodiment, a filler strip capable of defining the cross-sectional shape of the flow channel is inserted into the cavity of the diversion riser; the diversion riser is arranged in a staggered array such that its cross-section gradually decreases along the airflow direction.

[0010] According to a preferred embodiment, the first heat exchange shell includes an upper flow guide shell, an upper sealing frame, and an inlet flat-mouth expansion tube, wherein the upper sealing frame is integrally connected to the lower opening edge of the upper flow guide shell, and the inlet flat-mouth expansion tube communicating with its shell cavity is inserted into the inclined upper end of the upper flow guide shell; the upper sealing frame is detachably abutted against the upper edge of the thick frame.

[0011] According to a preferred embodiment, the lower guide shell of the second heat exchange shell is fastened to the bottom surface of the thick frame via a lower sealing frame connected thereto; a drain pipe is also inserted at the inclined lower end of the lower guide shell to allow the coolant after heat absorption to be discharged in a directional manner.

[0012] According to a preferred embodiment, a support column is supported on the base of the suspended bracket, and the top end of the support column is connected to the bottom surface of the U-shaped clamp; limit screws are threaded into both sides of the U-shaped clamp.

[0013] The beneficial effects of this utility model are:

[0014] The coolant in the first heat exchange shell of this application is gradually diverted by the diversion vertical pipe during its downward inclined flow, enabling the coolant and airflow to form independent and opposite flows, thus achieving effective heat exchange and improving heat exchange efficiency and sufficiency. In particular, the diversion vertical pipe continuously diverts the airflow in the pre-cooling shell, increasing the relative motion between gas molecules and facilitating thorough heat exchange, thereby improving heat exchange quality. The opposing flow directions of the coolant and airflow achieve a progressively increasing cooling effect on the airflow, ensuring effective cooling. The upper coolant guide chamber, diversion vertical pipe, and lower coolant guide chamber of this application enable multi-position heat exchange between airflow and coolant, improving heat exchange efficiency and quality. The suspended support of this application tilts and suspends the heat exchange structure, thereby enhancing the upward movement of the airflow and the downward movement of the coolant under the influence of buoyancy and gravity, further improving heat exchange effect. The guide fan of this application generates directional airflow, transferring the heat diffused from the pre-cooling shell and increasing the rate of heat dissipation. This application can pre-cool the gas input to the compression system to reduce the initial temperature of the gas, thereby enabling the compressor to operate under lower operating conditions, reducing the heat generated during the compression process, and alleviating the burden on the cooling system. At an ambient temperature of 38°C, pre-cooling can reduce the intake temperature to below 20°C, and the compressor efficiency can be increased by 10%-15%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred pre-cooling structure for associated gas recovery proposed in this utility model;

[0016] Figure 2This is a schematic diagram of the side structure of a preferred pre-cooling structure for associated gas recovery proposed in this utility model when the pre-cooling shell is horizontally placed;

[0017] Figure 3 This is a cross-sectional schematic diagram of point AA of a preferred pre-cooling structure for associated gas recovery proposed in this utility model;

[0018] Figure 4 This is a cross-sectional schematic diagram of a preferred pre-cooling structure for associated gas recovery proposed in this utility model.

[0019] List of reference numerals

[0020] 1: Pre-cooling shell; 2: First heat exchange shell; 3: Second heat exchange shell; 4: Diversion vertical pipe; 5: Suspended bracket; 6: Flow guide fan; 11: Inclined heat exchange flat shell; 12: Expansion tube; 13: Inlet pipe head; 14: Manifold; 15: Outlet pipe head; 111: Thick frame; 112: Upper heat exchange thin plate; 113: Lower heat exchange thin plate; 114: Diversion longitudinal rod; 115: Heat dissipation fins; 21: Upper flow guide shell; 22: Upper sealing frame; 23: Inlet flat expansion pipe; 31: Lower flow guide shell; 32: Lower sealing frame; 33: Drain pipe; 41: Filler strip; 51: Base; 52: Support column; 53: U-shaped clamp; 54: Limit screw. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0023] The following is a detailed explanation with reference to the accompanying drawings.

[0024] Example 1

[0025] This application provides a pre-cooling structure for associated gas recovery, which includes a pre-cooling shell 1, a first heat exchange shell 2, a second heat exchange shell 3, a diversion riser 4, a suspended support 5, and a flow guide fan 6.

[0026] according to Figure 1-4 In one specific embodiment, the precooling shell 1 forms a flow-guiding chamber for directional gas delivery to a gas compression device. A first heat exchange shell 2, which cooperates with the precooling shell 1 to form an upper coolant flow-guiding chamber, is mounted on its top surface. Several diversion vertical pipes 4 are staggered and arranged in an array on the precooling shell 1, penetrating its cavity but not communicating with it. A second heat exchange shell 3, which communicates with the first heat exchange shell 2 via the diversion vertical pipes 4, is also fastened to the bottom surface of the precooling shell 1. The bottom of the second heat exchange shell 3 is also provided with a suspension bracket 5 for suspending it, and flow-guiding fans 6 are arranged on both sides of the suspension bracket 5. The coolant in the first heat exchange shell 2, as it flows downwards at an angle, is gradually diverted by the diversion vertical pipes 4, thereby enabling the coolant and airflow to form independent and opposite flows, achieving effective heat exchange and improving heat exchange efficiency and sufficiency. In particular, the diversion riser 4 can continuously divert the airflow in the pre-cooling shell 1, increasing the relative motion between gas molecules and facilitating sufficient heat exchange, thus improving the heat exchange quality. The coolant and airflow flowing in opposite directions achieve a progressively increasing cooling effect on the airflow, ensuring effective cooling. The upper coolant guide chamber, diversion riser 4, and lower coolant guide chamber provided in this application enable multi-station heat exchange between airflow and coolant, improving heat exchange efficiency and quality. The suspended support 5 provided in this application can tilt and suspend the heat exchange structure, thereby enhancing the upward movement of the airflow and the downward movement of the coolant under the influence of buoyancy and gravity, further improving the heat exchange effect. The guide fan 6 provided in this application can generate directional airflow, thereby transferring the heat diffused from the pre-cooling shell 1 and increasing the rate of heat dissipation.

[0027] Preferably, the inclined lower end of the inclined heat exchange flat shell 11 of the precooling shell 1 is sealed and inserted with an extension tube 12 by welding. More preferably, an air inlet head 13 is connected to the inlet end of the extension tube 12 away from the inclined heat exchange flat shell 11. Preferably, a manifold 14 is sealed and inserted with a welded connection to the inclined upper end of the inclined heat exchange flat shell 11. More preferably, an air outlet head 15 is connected to the end of the manifold 14 away from the inclined heat exchange flat shell 11. Preferably, the extension tube 12 and the air inlet head 13 are sealed and connected by a tight-fitting pipe joint or by welding. Preferably, the manifold 14 and the air outlet head 15 are sealed and connected by a tight-fitting pipe joint or by welding. Preferably, the air inlet head 13 can be equipped with a primary filter or other gas filtration structure at its input end as needed, thereby preventing the mixing of particulate impurities such as stones during gas inhalation, to ensure gas quality and inhalation safety. Preferably, the outlet pipe 15 can be connected to the inlet end of the gas compression equipment via a flange, thereby enabling the pre-cooled gas output to be compressed. The expansion pipe 12 provided in this application can change the flow channel cross-section, transforming the circular pipe flow channel into a flat pipe that facilitates heat exchange. The manifold 14 provided in this application can convert the flat pipe to the circular pipe at the output end, thereby achieving the output of the pre-cooled gas.

[0028] Preferably, the inclined heat exchange flat shell 11 includes a thick frame 111 and an upper heat exchange plate 112 and a lower heat exchange plate 113 covering the top and bottom of the thick frame 111. Preferably, a diversion rod 114 perpendicular to the airflow direction and capable of secondary diversion of the directional airflow is longitudinally inserted on two opposing inner surfaces of the thick frame 111. Specifically, the diversion rod 114 is disposed between two rows of diversion vertical pipes 4. More preferably, the diversion rod 114 has a streamlined cross-section, so as to not cause strong obstruction to the airflow while diverting the airflow. Preferably, a plurality of diversion vertical pipes 4 are arranged in a staggered array within the frame cavity of the thick frame 111. Specifically, the upper and lower axial ends of the diversion vertical pipes 4 are inserted into the upper heat exchange plate 112 and the lower heat exchange plate 113 respectively through the plate wall. Preferably, heat dissipation fins 115, which are capable of conducting heat and are arranged vertically, are inserted at intervals on the outer surfaces of the two side frame walls of the thick frame 111 where the diversion longitudinal rods 114 are inserted. Preferably, the upper heat exchange plate 112, the lower heat exchange plate 113, and the diversion vertical pipe 4 are all supported by metal materials with certain structural strength and good thermal conductivity, such as copper alloy or aluminum alloy. More preferably, the two ends of the diversion vertical pipe 4 are respectively sealed and inserted into the upper heat exchange plate 112 and the lower heat exchange plate 113 by means of material addition welding, so that the diversion vertical pipe 4 passes through the shell cavity of the inclined heat exchange flat shell 11 but its pipe cavity is not connected to the shell cavity of the inclined heat exchange flat shell 11. Thus, the coolant in the pipe cavity of the diversion vertical pipe 4 and the airflow in the shell cavity of the inclined heat exchange flat shell 11 exchange heat through the pipe wall of the diversion vertical pipe 4, thereby using the coolant to effectively reduce the temperature of the airflow. The flow divider 114 provided in this application can change the flow channel profile of the inclined heat exchange flat shell 11 without the flow divider 4, thereby promoting the separation and combination of airflow and improving the relative motion between gas molecules in the airflow. This allows the gas molecules to contact the upper heat exchange plate 112 and the lower heat exchange plate 113 more fully and to have more efficient heat exchange with the coolant in the upper and lower coolant guide chambers, thus improving the heat exchange effect.

[0029] Preferably, the first heat exchange shell 2 includes an upper guide shell 21, an upper sealing frame 22, and an inlet flat-mouth expansion tube 23. Preferably, the upper sealing frame 22 is integrally connected to the lower opening edge of the upper guide shell 21. More preferably, the inlet flat-mouth expansion tube 23, communicating with its shell cavity, is inserted into the inclined upper end of the upper guide shell 21 by welding. Preferably, the upper sealing frame 22 is detachably abutted against the upper edge of the thick body frame 111, thereby forming an upper coolant guide chamber by the upper guide shell 21 and the upper heat exchange thin plate 112. Preferably, a sealing gasket is embedded on the lower surface of the upper sealing frame 22 to fill the assembly gap between it and the thick body frame 111, thereby ensuring the sealing of the mating edge of the assembled upper coolant guide chamber. More preferably, countersunk screws are circumferentially spaced on the upper sealing frame 22, and the inserted front end of the countersunk screws is also threaded into the frame of the thick body frame 111, thereby defining a stable splicing state between the upper sealing frame 22 and the thick body frame 111. Preferably, a felt layer is also covered on the outer wall surface of the upper guide housing 21 to improve its sound insulation and noise reduction capabilities while improving the heat preservation effect of the coolant and reducing the possibility of the coolant being heated by the high-temperature external environment.

[0030] Preferably, the lower guide shell 31 of the second heat exchange shell 3 is fastened to the bottom surface of the thick frame 111 by a lower sealing frame 32 integrally connected to it around the upper opening edge, thereby forming a lower coolant guide chamber by the lower guide shell 31 and the lower heat exchange plate 113. Preferably, a drain pipe 33 for directional discharge of the coolant after heat absorption is also inserted at the inclined lower end of the lower guide shell 31. Preferably, the lower sealing frame 32 can be integrally formed and connected to the lower guide shell 31, or it can be sealed by welding assembly. More preferably, a sealing gasket is embedded on the upper surface of the lower sealing frame 32 to fill the assembly gap between it and the thick frame 111, thereby ensuring the sealing of the mating edge of the assembled lower coolant guide chamber. More preferably, countersunk screws are circumferentially spaced on the lower sealing frame 32, and the inserted front end of the countersunk screws is also threaded into the frame of the thick body frame 111, thereby defining a stable splicing state between the lower sealing frame 32 and the thick body frame 111. Preferably, a felt layer is also covered on the outer wall surface of the lower guide housing 31 to improve its sound insulation and noise reduction capabilities while improving the heat preservation effect of the coolant and reducing the possibility of the coolant being heated by the high-temperature external environment. Preferably, the drain pipe 33 is connected to the shell cavity by penetrating the shell wall of the lower guide housing 31, and the sealing connection stability of the two is ensured by welding.

[0031] More preferably, the inlet flat expansion pipe 23 and the outlet pipe 33 are respectively connected to the coolant output end and coolant input end of the TEO / 681S type industrial external coolant circulation equipment through a flange structure to form a closed loop of coolant circulation, thereby continuously cooling the gas.

[0032] Preferably, a filler strip 41 is inserted into the cavity of the split riser 4 to define the cross-sectional shape of the flow channel for coolant passage. Specifically, the split risers 4 are arranged in a staggered matrix with their cross-sections decreasing gradually along the airflow direction. That is, the axial cross-section of the split riser 4 downstream of the guide shell cavity formed by the inclined heat exchange flat shell 11 is smaller than that upstream, so as to gradually disperse the airflow and achieve sufficient contact heat exchange. Preferably, the total flow channel cross-section of the split risers 4 is adapted to the input flow rate, thereby ensuring that the coolant can be effectively split by the split risers 4 in a substantially uniform manner. Specifically, the cross-section of the split vertical pipe 4 on the airflow input side of the inclined heat exchange flat shell 11 is larger than that on the airflow output side of the inclined heat exchange flat shell 11. This allows the small cross-section split vertical pipe 4 near the coolant input side and the large cross-section split vertical pipe 4 far from the coolant input side to have equivalent flow guiding capacity. This enables the several split vertical pipes 4 to perform uniform and equivalent flow splitting and ensures the fluidity of the coolant in the entire upper coolant guiding chamber. This, in turn, ensures the coolant replacement effect of the overall liquid flow channel and ensures the sufficiency of continuous gas cooling.

[0033] Preferably, a support column 52 is supported on the base 51 of the suspended bracket 5. More preferably, the top end of the support column 52 is connected to the bottom surface of the U-shaped clamp 53. Preferably, limit screws 54 are threaded into both sides of the U-shaped clamp 53. Preferably, the top and bottom ends of the support column 52 are connected to the base 51 and the bottom surface of the U-shaped clamp 53 by welding or other means. The operator adjusts the insertion depth of the limit screws 54 to maintain the relative stability of the second heat exchange shell 3 placed in the U-groove of the U-shaped clamp 53.

[0034] Preferably, the base plate of the airflow fan 6 is mounted on the side of the support column 52 by welding or other methods, and multiple coplanar and series-connected cooling fans are installed side by side on the base plate. Specifically, the multiple cooling fans are connected to an external power supply and switch via series cables attached to the base plate. When gas is input into the pre-cooling housing 1, the operator turns on the cooling fans to form an upward cooling airflow, which flows through the gaps between the cooling fins 115, accelerating the heat transfer effect of the cooling fins 115. Preferably, the cooling fans are fixed to the base plate by bolts or welding. The cooling fans can be YPF290 type airflow fans.

[0035] Preferably, the electrical components involved in this application, such as the cooling fan and the external coolant circulation device, are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0036] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0037] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A pre-cooling structure for associated gas recovery, comprising a pre-cooling shell (1) capable of directional gas delivery, characterized in that, A first heat exchange shell (2) is provided on the top surface of the precooling shell (1) to form an upper coolant guide chamber. A number of diversion vertical pipes (4) are staggered and inserted into the precooling shell (1) in a manner that penetrates its shell cavity but does not communicate with it. Furthermore, a second heat exchange shell (3) with a lower coolant guide chamber that can communicate with the first heat exchange shell (2) through the diversion vertical pipes (4) is also fastened to the bottom surface of the precooling shell (1). The bottom of the second heat exchange shell (3) is also provided with a suspension bracket (5) that can suspend and support it, and a flow guide fan (6) placed on both sides of the suspension bracket (5).

2. The pre-cooling structure for associated gas recovery as described in claim 1, characterized in that, The inclined lower end of the inclined heat exchange flat shell (11) of the precooling shell (1) is connected to an extension tube (12), and the inlet end of the extension tube (12) away from the inlet end of the inclined heat exchange flat shell (11) is connected to an air inlet head (13). The inclined upper end of the inclined heat exchange flat shell (11) is connected to a manifold (14), and an outlet pipe (15) is connected to the end of the manifold (14) away from the inclined heat exchange flat shell (11).

3. The pre-cooling structure for associated gas recovery as described in claim 2, characterized in that, The inclined heat exchange flat shell (11) includes a thick frame (111) and an upper heat exchange plate (112) and a lower heat exchange plate (113) covering the top and bottom of the thick frame (111), wherein, A diversion rod (114) capable of secondary diversion of directional airflow is longitudinally inserted on two opposing inner surfaces of the thick frame (111). The thick frame (111) has a number of diversion vertical pipes (4) arranged in a staggered array inside the frame cavity, and the upper and lower ends of the diversion vertical pipes (4) are inserted into the upper heat exchange plate (112) and the lower heat exchange plate (113) respectively through the plate wall.

4. The pre-cooling structure for associated gas recovery as described in claim 3, characterized in that, Heat dissipation fins (115) are inserted at intervals on the outer side of the two side frame walls of the thick frame (111) on which the diversion longitudinal rod (114) is inserted.

5. The pre-cooling structure for associated gas recovery as described in claim 4, characterized in that, A filler strip (41) capable of defining the cross-sectional shape of the flow channel is inserted into the cavity of the diversion riser (4); The diversion vertical pipe (4) is arranged in a staggered array according to the method of gradually decreasing the cross-section of the pipe body along the airflow direction.

6. The pre-cooling structure for associated gas recovery as described in claim 5, characterized in that, The first heat exchange shell (2) includes an upper flow guide shell (21), an upper sealing frame (22), and an inlet flat-mouth expansion tube (23), wherein, An upper sealing frame (22) is integrally connected to the lower opening edge of the upper flow guide housing (21), and the input flat-mouth expansion tube (23) communicating with its cavity is inserted into the inclined upper end of the upper flow guide housing (21). The upper sealing frame (22) is detachably abutted against the upper edge of the thick frame (111).

7. The pre-cooling structure for associated gas recovery as described in claim 6, characterized in that, The lower guide shell (31) of the second heat exchange shell (3) is fastened to the bottom surface of the thick body frame (111) by the lower sealing frame (32) connected thereto; A drain pipe (33) is also inserted into the inclined lower end of the lower guide housing (31) to allow the coolant after heat absorption to be discharged in a directional manner.

8. The pre-cooling structure for associated gas recovery as described in claim 7, characterized in that, A support column (52) is supported on the base (51) of the suspended bracket (5), and the top of the support column (52) is connected to the bottom surface of the U-shaped clamp (53). Limiting screws (54) are threaded into both sides of the U-shaped clamp (53).

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