Screw type oil-gas compression output gas-liquid separation equipment and process method thereof

Abstract

The invention discloses screw type oil gas compression output gas-liquid separation equipment and a process method thereof, and relates to the technical field of oil gas compression. A cooling area is formed in the area, adjacent to the inner wall of a gas-liquid separation tank body, of an upper flow cavity, and the bottom end of an output rotating shaft is fixedly connected with an annular installation sleeve piece rotationally installed below a separation disc. The bottom end of the output rotating shaft is fixedly connected with the chassis, and a plurality of first-stage air gap filter element pieces are embedded in the annular side of the annular cylinder. The extension cylinder extends into the inner periphery of the annular cylinder, a first-stage filter cavity located below the vertical cylinder is formed among the extension cylinder, the annular cylinder and the base plate, and a plurality of second-stage air gap filter element pieces are vertically embedded into the vertical cylinder. The gas-liquid separation tank is further provided with a first air pressure monitoring module used for monitoring the air pressure of the upper flow cavity and a second air pressure monitoring module used for monitoring the air pressure of the discharge cavity. The filtering performance of the filter element can be kept, frequent blockage of the filter element is avoided, the number of times of shutdown for cleaning the filter element is greatly reduced, and it is guaranteed that the oil gas compression process is efficiently and smoothly carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas compression, and in particular to a gas-liquid separation device for screw-type oil and gas compression output and a process method thereof. Background Art

[0002] After the screw compressor compresses the oil and gas, the airflow pressure rises significantly, causing the airflow to liquefy. When the gas-liquid separator separates the liquid in the airflow, most of the liquid droplets in the airflow can be separated from the airflow through swirl and the inverted conical baffle of the gas-liquid separator. However, the initially separated airflow still contains a small amount of liquid droplets, which still has a certain impact on the subsequent pipeline transmission airflow.

[0003] The existing method is to directly add a filter element in the gas-liquid separation tank to directly filter the droplets in the airflow, but the filter element is prone to clogging after long-term use, seriously affecting the normal gas-liquid filtration and separation. When the filter element is clogged, the entire compression system needs to be shut down and the filter element of the gas-liquid separation tank needs to be removed for cleaning, which in turn affects the compression operation.

[0004] In summary, how to further reduce the clogging of the filter element in the gas-liquid separation tank when filtering and separating the gas-liquid mixed airflow, avoid frequent shutdowns to clean the filter element, and ensure the efficient and smooth progress of the oil and gas compression process has become an urgent problem to be solved. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a screw-type oil and gas compression output gas-liquid separation equipment and a process method thereof, thereby maintaining the filtering performance of the filter element, avoiding frequent clogging of the filter element, greatly reducing the number of shutdowns for cleaning the filter element, and ensuring the efficient and smooth progress of the oil and gas compression process.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions: A gas-liquid separation device for screw-type oil and gas compression output includes a gas-liquid separation tank body, which is equipped with an air inlet end, an air outlet end, and a top cover. The gas-liquid separation tank body is internally equipped with a separation cone, a partition plate, an air inlet separation chamber located below the separation cone, an upflow chamber located between the separation cone and the partition plate, and an exhaust chamber located above the partition plate, wherein the upflow chamber and the adjacent area of ​​the inner wall of the gas-liquid separation tank body form a cooling area, and the gas-liquid separation tank body is built with an annular cooling liquid pipe extending into the cooling area. An inverted motor is arranged in the middle of the top cover, and an output shaft extending into the gas-liquid separation tank body is arranged at the output end of the inverted motor, and the bottom end of the output shaft is fixedly connected to an annular installation kit rotatably installed below the partition plate. The annular installation kit includes an annular cylinder and a chassis fixedly installed on the bottom side of the annular cylinder, wherein the bottom end of the output shaft is fixedly connected to the chassis, and a plurality of primary air gap filter elements are embedded on the annular side of the annular cylinder.

[0007] A vertical installation kit is fixedly installed in the middle of the partition plate, and the vertical installation kit includes a vertical cylinder and an extension cylinder located below the vertical cylinder, wherein the extension cylinder extends into the inner periphery of the annular cylinder, and a primary filter chamber located below the vertical cylinder is formed between the extension cylinder, the annular cylinder and the chassis, and the primary air gap filter element is connected with the upstream chamber and the primary filter chamber, and a plurality of secondary air gap filter elements are vertically embedded and installed in the vertical cylinder, and the secondary air gap filter element is connected with the primary filter chamber and the discharge chamber, and the air gap size of the secondary air gap filter element is smaller than the air gap size of the primary air gap filter element. The gas-liquid separation tank body is also equipped with a first air pressure monitoring module for monitoring the air pressure of the upstream chamber and a second air pressure monitoring module for monitoring the air pressure of the discharge chamber.

[0008] As a preferred technical solution of the device of the present invention: a first thrust bearing ring is arranged between the top side of the annular installation kit and the bottom side of the partition plate. A second thrust bearing ring is arranged at the middle of the upper side of the chassis and is located outside the output shaft, and the bottom end of the extension tube is fixedly connected to the top side of the second thrust bearing ring. The annular installation kit can rotate freely through the first thrust bearing ring and the second thrust bearing ring, while the vertical installation kit remains fixed.

[0009] As a preferred technical solution of the equipment of the present invention: a plurality of ring-position installation grooves are opened on the side surface of the ring cylinder, the first-level air gap filter element is installed at the position of the ring-position installation groove, and the outer end surface of the first-level air gap filter element is concave in the side surface of the ring cylinder.

[0010] As a preferred technical solution of the device of the present invention: the upper side of the chassis is provided with an inclined slope with a height rising toward the primary air gap filter element. After entering the primary filter cavity, the liquefied droplets are thrown into the primary filter element with centrifugal action and thrown out along the primary filter element.

[0011] As a preferred technical solution of the device of the present invention: an axial slot is opened at the center of the vertical cylinder and the extension cylinder, and the output shaft is movably inserted at the position of the axial slot. The vertical cylinder is provided with a plurality of vertical installation slots located on the side of the axial slot ring, and the secondary air gap filter element is installed at the position of the vertical installation slot.

[0012] As a preferred technical solution for the equipment of the present invention: the maximum total ventilation volume of the air gaps of all secondary air gap filter elements is the same as the maximum total ventilation volume of the air gaps of all primary air gap filter elements, ensuring that the gas entering the primary filter cavity from the primary air gap filter element can efficiently pass through the secondary air gap filter element, thereby improving the exhaust efficiency.

[0013] As a preferred technical solution of the device of the present invention: the cooling amount input into the upper flow cavity by the annular cold liquid pipe in real time is positively correlated with the air flow rate injected into the gas-liquid separation tank in real time.

[0014] A gas-liquid separation process for screw type oil and gas compression output, comprising the following contents: S1. After the screw compressor compresses the airflow, the gas-liquid mixed airflow enters the gas-liquid separation tank, rotates upward and reaches the separation cone, and the gas-liquid mixed airflow completes the initial gas-liquid separation.

[0015] S2. The gas-liquid mixed airflow containing a small amount of droplets enters the upper flow chamber from the bottom opening of the separation cone. The cold liquid circulating in the annular cold liquid pipe reduces the temperature of the cooling area. When the gas-liquid mixed airflow reaches the vicinity of the cooling area, the droplets condense and drip, and the droplets flow downward along the separation cone out of the upper flow chamber.

[0016] S3. The gas-liquid mixed air flow after secondary condensation is filtered through the primary air gap filter element and enters the primary filter chamber. The air flow in the primary filter chamber enters the discharge chamber through the secondary air gap filter element and is discharged from the air outlet.

[0017] When the gas-liquid mixed airflow enters the gas-liquid separation tank, the inverted motor starts, driving the annular installation kit to rotate at the initial speed V preset by the system. 初始 Rotate.

[0018] S4. The first air pressure monitoring module monitors the air pressure P of the upper flow cavity in real time x The second air pressure monitoring module monitors the air pressure P of the exhaust chamber in real time. y。

[0019] S5. When P x ≤P y +P θ When the inverted motor outputs real-time speed V 初始 .

[0020] Among them, P θ The system presets the pressure difference generated by the primary air gap filter element and the secondary air gap filter element under normal filtering conditions. When the pressure difference between the upstream cavity and the discharge cavity increases, it indicates that the primary air gap filter element and the secondary air gap filter element may be blocked. Accelerating the rotation speed of the annular installation kit can throw out the blocked droplets remaining in the primary air gap filter element.

[0021] S6. When P x >P y +P θ When the inverted motor outputs real-time speed F (V), the system delay time T is triggered at the same time 参考 , duration T 参考 After that, the real-time output speed of the inverted motor is restored to V 初始 : .

[0022] Where ΔP=P x -P y -P θ , is the basic adjustment parameter value based on the air pressure difference ΔP. is the adjustment parameter value based on the rate of change of the air pressure difference. Adjust the parameter value for the filter element usage time. , t 运行 is the total running time of the filter element, and k is the constant coefficient to be determined.

[0023] S6.1. The first air pressure monitoring module and the second air pressure monitoring module continue to monitor the air pressure. If P x >P y +P θ , the inverted motor is turned again according to the real-time monitored air pressure difference ΔP and the total running time t of the filter element 运行 Real-time output speed F (V).

[0024] S6.2. After repeating the control contents in S6.1 for no less than three times, if the air pressure difference ΔP increases continuously, the system will output a filter element blockage prompt message.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a separation cone, a partition plate and other components in the gas-liquid separation tank body, and the gas-liquid mixed airflow is first separated by the separation cone before entering the upper flow chamber. During this process, the annular cold liquid pipe reduces the temperature of the cooling area to further condense and drip the droplets, thereby reducing the amount of droplets entering the filter element. Moreover, when the air pressure monitoring module detects the change in the air pressure difference between the upper flow chamber and the discharge chamber, the control system drives the inverted motor to linearly adjust the real-time speed of the annular installation kit, which can timely throw out the blocked droplets remaining in the primary air gap filter element, thereby maintaining the filtering performance of the filter element and avoiding frequent blockages.

[0026] 2. The present invention does not need to frequently shut down to clean the filter element due to filter element blockage as in the past, ensuring the efficient and smooth progress of the oil and gas compression process, greatly improving production efficiency, reducing the time cost and economic loss caused by shutdown maintenance, and enabling the entire screw oil and gas compression system to operate stably, meeting the continuity requirements of industrial production for oil and gas compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention.

[0028] Figure 2 for Figure 1 Schematic diagram of the local structure of the equipment.

[0029] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0030] Figure 4It is a schematic diagram of the assembly structure of the partition plate and related components in the present invention.

[0031] Figure 5 It is a schematic diagram of the disassembled structure of the partition plate, annular installation kit, primary air gap filter element, vertical installation kit, secondary air gap filter element and related components in the present invention.

[0032] Figure 6 for Figure 4 Bottom view of the middle part.

[0033] Figure 7 for Figure 5 Bottom view of the middle part.

[0034] Figure 8 It is a structural schematic diagram of the annular installation kit and the primary air gap filter element in the present invention.

[0035] Fig. 9 It is a schematic diagram of the structure of the vertical installation kit and the secondary air gap filter element in the present invention.

[0036] Fig.10 for Fig. 9 Bottom view of the middle part.

[0037] Fig.11 It is a schematic diagram of the application of the device of the present invention in a screw compression system.

[0038] Among them: 1-gas-liquid separation tank, 101-air inlet end, 102-air inlet separation chamber, 103-upstream chamber, 1031-cooling area, 104-discharge chamber, 105-air outlet end, 106-top cover, 2-separation cone, 3-spacer; 4-annular cold liquid pipe, 5-first thrust bearing ring, 6-annular installation kit, 601-annular cylinder, 602-annular installation groove, 603-chassis, 6031-inclined slope, 604-first filter chamber; 7-first air gap filter element, 8-vertical installation kit, 801-vertical cylinder, 802-extension cylinder, 803-axial slot, 804-vertical installation groove; 9-second thrust bearing ring, 10-secondary air gap filter element, 11-inverted motor, 1101-output shaft, 12-first air pressure monitoring module, 13-second air pressure monitoring module. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] Embodiment 1: The present invention designs a screw-type gas-liquid separation device for oil-gas compression output, and the specific equipment configuration is as follows: like Figure 1 , Figure 2 The gas-liquid separation tank body 1 is provided with an air inlet end 101, an air outlet end 105, and a top cover 106. Inside, there are a separation cone 2, a partition plate 3, an air inlet separation chamber 102, an upstream chamber 103, and a discharge chamber 104. The upstream chamber 103 and the adjacent area of ​​the inner wall of the tank body form a cooling area 1031. The tank body is provided with a built-in annular cold liquid pipe 4 extending into the cooling area 1031, and is also provided with a first air pressure monitoring module 12 and a second air pressure monitoring module 13.

[0041] like Figure 1 , Figure 2 , Separation cone 2: located inside the gas-liquid separation tank 1, used for the preliminary separation of the gas-liquid mixed airflow.

[0042] like Figure 2 , Figure 3 , Figure 4 , the partition plate 3 is installed in the gas-liquid separation tank body 1, and the vertical installation kit 8 is fixedly installed in the middle.

[0043] like Figure 1 , Inlet separation chamber 102: located below the separation cone 2 and connected to the inlet end 101.

[0044] like Figure 1 , Figure 2 , Upflow chamber 103: It is located between the separation cone 2 and the partition plate 3, and is connected to the air inlet separation chamber 102. The area adjacent to the inner wall of the tank body is the cooling area 1031.

[0045] like Figure 1 , discharge chamber 104: above the partition plate 3, connected with the gas outlet end 105.

[0046] like Figure 2 , annular cooling liquid pipe 4: extends into the cooling area 1031 of the gas-liquid separation tank body 1, and the cooling amount input into the upper flow cavity 103 is positively correlated with the air flow rate injected into the tank body.

[0047] like Figure 1 , Figure 2 , the inverted motor 11 is installed in the middle of the top cover 106, and the output end is configured with an output shaft 1101 extending into the gas-liquid separation tank body 1.

[0048] like Figure 2 , Figure 3 , Figure 4 , Figure 8 , Fig. 9 The output shaft 1101 is connected to the output end of the inverted motor 11 , and the bottom end is fixedly connected to the chassis 603 of the annular mounting kit 6 , and is also movably inserted in the axial slot 803 of the vertical mounting kit 8 .

[0049] like Figure 3 , Figure 5 , Figure 7 , Figure 8 , annular installation kit 6: includes an annular tube 601 and a chassis 603, a plurality of primary air gap filter elements 7 are embedded in the annular side of the annular tube 601, the chassis 603 is fixedly connected to the bottom end of the output shaft 1101, a first thrust bearing ring 5 is arranged between the top side surface and the bottom side surface of the partition plate 3, a second thrust bearing ring 9 is arranged in the middle of the upper side of the chassis 603, the second thrust bearing ring 9 is fixedly connected to the bottom end of the extension tube 802, and an inclined slope 6031 is arranged on the upper side surface of the chassis 603.

[0050] like Figure 2 , Figure 3 , Figure 8 , the first-stage air gap filter element 7: is installed at the ring installation groove 602 of the ring cylinder 601, and the outer end surface is concave in the ring side surface of the ring cylinder 601, and is connected with the upper flow cavity 103 and the first-stage filter cavity 604.

[0051] like Figure 3 , Figure 5 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , vertical installation kit 8: includes a vertical cylinder 801 and an extension cylinder 802, the extension cylinder 802 extends into the inner periphery of the annular cylinder 601, and forms a primary filter chamber 604 with the annular cylinder 601 and the chassis 603, the vertical cylinder 801 is vertically embedded with multiple secondary air gap filter elements 10, an axial slot 803 is opened at the center of the vertical cylinder 801 and the extension cylinder 802, the vertical cylinder 801 is opened with multiple vertical installation grooves 804, the secondary air gap filter element 10 is installed here, the secondary air gap filter element 10 is connected with the primary filter chamber 604 and the discharge chamber 104, and the air gap size is smaller than the air gap size of the primary air gap filter element 7, and the maximum total ventilation amount of the air gaps of all secondary air gap filter elements 10 is the same as the maximum total ventilation amount of the air gaps of all primary air gap filter elements 7.

[0052] like Figure 3 , Figure 5 , Figure 7 , the first thrust bearing ring 5 is arranged between the top side of the annular installation kit 6 and the bottom side of the spacer 3 to ensure that the annular installation kit 6 can rotate freely.

[0053] like Figure 3 , Figure 5 , Figure 7 , The second thrust bearing ring 9 is located in the middle of the upper side of the chassis 603 and outside the output shaft 1101, so that the vertical installation kit 8 remains stationary.

[0054] like Figure 8 , Ring installation groove 602: opened on the side surface of the ring tube 601, used for installing the first-level air gap filter element 7.

[0055] like Figure 3 , Figure 8 , inclined slope 6031: on the upper side of the chassis 603, the height increases toward the primary air gap filter element 7 to facilitate the removal of droplets.

[0056] like Figure 7 , Fig. 9 , Fig.10 , Axial slot 803: It is opened at the center of the vertical tube 801 and the extension tube 802 for the output shaft 1101 to be movably inserted.

[0057] like Fig. 9 , Fig.10 , Vertical mounting groove 804: located on the ring side of the axial slot 803 of the vertical cylinder 801, used for installing the secondary air gap filter element 10.

[0058] Embodiment 2: The present invention also designs a gas-liquid separation process method for screw-type oil-gas compression output, and the specific process method is: Step 1: Initial separation After the screw compressor compresses the oil-gas mixture, the gas-liquid mixed airflow enters the air inlet separation chamber 102 of the gas-liquid separation tank 1 from the air inlet end 101 at a certain speed (such as usually 10-30m / s), and the airflow enters the chamber along the tangential direction, forming a rotating upward airflow, and rushes toward the separation cone 2. Due to the centrifugal force and gravity, most of the larger droplets hit the inner wall of the separation cone 2, and flow back to the bottom of the air inlet separation chamber 102 along the cone wall under the action of gravity, achieving preliminary gas-liquid separation.

[0059] Step 2: Secondary condensation and dripping After preliminary separation, the gas-liquid mixed airflow containing a small amount of droplets enters the upper flow chamber 103 from the bottom opening of the separation cone 2. At this time, the coolant in the annular coolant pipe 4 circulates and reduces the temperature of the cooling area 1031 according to the preset cooling strategy (such as adjusting the coolant flow and temperature according to parameters such as airflow rate and temperature). When the gas-liquid mixed airflow reaches the vicinity of the cooling area 1031, the droplets in the airflow condense more due to the decrease in temperature, forming larger droplets that drip under the action of gravity, and flow down along the inner wall of the separation cone 2 back to the air intake separation chamber 102 or collect at the bottom of the tank, further reducing the amount of droplets entering the filter element.

[0060] Step 3: Filtration and discharge: The gas-liquid mixed airflow after secondary condensation is filtered at a relatively stable speed through the primary air gap filter element 7. The air gap size of the primary air gap filter element 7 is designed according to the oil and gas characteristics and the expected filtering accuracy (such as 0.1-0.5mm). The tiny droplets in the airflow are blocked by the filter element, and the filtered airflow enters the primary filter chamber 604. In the primary filter chamber 604, after a short stay and buffering, the airflow is further filtered through the secondary air gap filter element 10. The air gap size of the secondary air gap filter element 10 is smaller (0.05-0.2mm), ensuring that the droplets in the gas are fully filtered. The filtered pure gas enters the discharge chamber 104 and is discharged from the gas outlet 105 to enter the subsequent gas processing or transportation link. During the whole process, when the gas-liquid mixed airflow enters the gas-liquid separation tank body 1, the control system simultaneously starts the inverted motor 11 to drive the annular installation kit 6 at the initial speed V preset by the system. 初始 Rotation provides power for subsequent filter element anti-clogging operations.

[0061] Step 4: Air pressure monitoring and motor speed control: The first air pressure monitoring module 12 and the second air pressure monitoring module 13 continuously monitor the air pressure P of the upper flow chamber 103 in real time. x and the gas pressure P of the exhaust chamber 104 y The data is collected and analyzed once a second by the control system.

[0062] Case 1: When P x ≤P y +P θ When the inverted motor 11 outputs a real-time speed of V 初始 .

[0063] Among them, P θ The system presets the pressure difference generated by the primary air gap filter element 7 and the secondary air gap filter element 10 under normal filtering conditions.

[0064] Case 2: When P x >P y +P θ When the inverted motor 11 outputs a real-time speed of F (V), the system delay time T is triggered at the same time. 参考 , duration T 参考 After that, the real-time output speed of the inverted motor 11 is restored to V 初始 : .

[0065] ΔP=P x -P y -P θ , is the basic adjustment parameter value based on the air pressure difference ΔP.

[0066] It is the adjustment parameter value based on the rate of change of the air pressure difference. When the rate of change of the air pressure difference is large, this function can quickly increase the motor speed and effectively deal with the situation where the filter element is suddenly blocked.

[0067] Adjust the parameter value for the filter element usage time. , t 运行 is the total running time of the filter element, and k is the constant coefficient to be determined. 运行 As the value of the function increases, the speed of the inverted motor increases slowly, compensating for the reduced filtering capacity of the filter element due to the increase in usage time, and preventing filter blockage. When the total running time of the filter element is long and reaches the prescribed time for replacement, even if the system does not report a blockage fault, it should be replaced or cleaned in time.

[0068] Monitor and drive again: The first air pressure monitoring module 12 and the second air pressure monitoring module 13 continue to monitor the air pressure. If P is still x >P y +P θ , the inverted motor 11 is again turned according to the real-time monitored air pressure difference ΔP and the total running time t of the filter element 运行 Real-time output speed F (V).

[0069] Finally, after repeating the above-mentioned monitoring and driving control content for no less than three times, if the air pressure difference ΔP increases continuously (such as the increase exceeds 0.02MPa for three consecutive times), the system determines that the filter element is seriously blocked and outputs a filter element blockage prompt message to remind the operator to maintain or replace the filter element. The prompt message can be displayed through the sound and light alarm device or on the control system display screen to ensure the stable operation of the equipment and the gas-liquid separation effect.

[0070] 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. A screw type oil and gas compression output gas-liquid separation device, characterized in that: The invention comprises a gas-liquid separation tank body (1), wherein the gas-liquid separation tank body (1) is provided with an air inlet end (101), an air outlet end (105), and a top cover (106), and is characterized in that: The gas-liquid separation tank body (1) is internally provided with a separation cone (2), a partition plate (3), an air inlet separation chamber (102) located below the separation cone (2), an upper flow chamber (103) located between the separation cone (2) and the partition plate (3), and a discharge chamber (104) located above the partition plate (3), wherein the upper flow chamber (103) and an adjacent region of the inner wall of the gas-liquid separation tank body (1) form a cooling region (1031), and the gas-liquid separation tank body (1) is internally provided with an annular cooling liquid pipe (4) extending into the cooling region (1031); An inverted motor (11) is disposed in the middle of the top cover (106); an output shaft (1101) extending into the gas-liquid separation tank (1) is disposed at the output end of the inverted motor (11); the bottom end of the output shaft (1101) is fixedly connected to an annular mounting kit (6) rotatably mounted below the partition plate (3); The annular installation kit (6) comprises an annular cylinder (601) and a chassis (603) fixedly mounted on the bottom side of the annular cylinder (601), wherein the bottom end of the output shaft (1101) is fixedly connected to the chassis (603), and a plurality of primary air gap filter elements (7) are embedded on the annular side of the annular cylinder (601); A vertical installation kit (8) is fixedly installed in the middle of the partition plate (3), and the vertical installation kit (8) comprises a vertical cylinder (801) and an extension cylinder (802) located below the vertical cylinder (801), wherein the extension cylinder (802) extends into the inner periphery of the annular cylinder (601), and a primary filter chamber (604) located below the vertical cylinder (801) is formed between the extension cylinder (802), the annular cylinder (601) and the bottom plate (603), and the primary air gap filter element (7) is connected to the upper flow chamber (103) and the primary filter chamber (604), and a plurality of secondary air gap filter elements (10) are vertically embedded and installed in the vertical cylinder (801), and the secondary air gap filter element (10) is connected to the primary filter chamber (604) and the discharge chamber (104), and the air gap size of the secondary air gap filter element (10) is smaller than the air gap size of the primary air gap filter element (7); The gas-liquid separation tank (1) is further provided with a first air pressure monitoring module (12) for monitoring the air pressure of the upstream chamber (103) and a second air pressure monitoring module (13) for monitoring the air pressure of the discharge chamber (104).

2. The screw type oil and gas compression output gas-liquid separation device according to claim 1, characterized in that: A first thrust bearing ring (5) is arranged between the top side of the annular mounting kit (6) and the bottom side of the spacer (3); A second thrust bearing ring (9) located on the periphery of the output shaft (1101) is disposed in the middle of the upper side of the chassis (603), and the bottom end of the extension tube (802) is fixedly connected to the top side of the second thrust bearing ring (9).

3. The gas-liquid separation device for screw-type oil-gas compression output according to claim 1, characterized in that: The annular side surface of the annular cylinder (601) is provided with a plurality of annular mounting grooves (602), the primary air gap filter element (7) is mounted at the position of the annular mounting grooves (602), and the outer end surface of the primary air gap filter element (7) is recessed into the annular side surface of the annular cylinder (601).

4. The gas-liquid separation device for screw-type oil-gas compression output according to claim 1 is characterized in that: The upper side surface of the chassis (603) is provided with an inclined slope (6031) whose height increases towards the primary air gap filter element (7).

5. The gas-liquid separation device for oil-gas compression output according to claim 1, characterized in that: An axial slot (803) is provided at the center of the vertical tube (801) and the extension tube (802), and the output shaft (1101) is movably inserted in the axial slot (803); The vertical cylinder (801) is provided with a plurality of vertical installation grooves (804) located on the annular side of the axial slot (803), and the secondary air gap filter element (10) is installed at the position of the vertical installation grooves (804).

6. The screw type oil and gas compression output gas-liquid separation device according to claim 1, characterized in that: The maximum total ventilation volume of the air gaps of all the secondary air gap filter elements (10) is the same as the maximum total ventilation volume of the air gaps of all the primary air gap filter elements (7).

7. The gas-liquid separation device for oil-gas compression output according to claim 1, characterized in that: The amount of cooling that is input into the upper flow cavity by the annular cold liquid pipe (4) in real time is positively correlated with the air flow rate that is injected into the gas-liquid separation tank body (1) in real time.

8. A gas-liquid separation process for screw oil and gas compression output, characterized in that: A gas-liquid separation device for oil-gas compression output using a screw type according to any one of claims 1 to 7, comprising the following contents: S1. After the screw compressor compresses the airflow, the gas-liquid mixed airflow enters the gas-liquid separation tank (1), and the gas-liquid mixed airflow rotates upward and reaches the separation cone (2), and the gas-liquid mixed airflow completes the preliminary gas-liquid separation; S2. A gas-liquid mixed airflow containing a small amount of liquid droplets enters the upper flow chamber (103) from the bottom opening of the separation cone (2), and the cold liquid circulating in the annular cold liquid pipe (4) lowers the temperature of the cooling area (1031). When the gas-liquid mixed airflow reaches the vicinity of the cooling area (1031), the liquid droplets condense more rapidly and drip, and the liquid droplets flow downward along the separation cone (2) out of the upper flow chamber (103); S3. The gas-liquid mixed air flow after the secondary condensation is filtered through the primary air gap filter element (7) and enters the primary filter chamber (604). The air flow in the primary filter chamber (604) passes through the secondary air gap filter element (10) and enters the discharge chamber (104), and is discharged from the air outlet (105); When the gas-liquid mixed airflow enters the gas-liquid separation tank (1), the inverted motor (11) starts, driving the annular installation kit (6) to rotate at an initial rotation speed V preset by the system. 初始 Rotation; S4. The first air pressure monitoring module (12) monitors the air pressure P of the upper flow chamber (103) in real time x The second air pressure monitoring module (13) monitors the air pressure P of the discharge chamber (104) in real time. y ; S5. When P x ≤P y +P θ When the inverted motor (11) outputs a real-time speed of V 初始 ; Among them, P θ The system presets a pressure difference generated by the primary air gap filter element (7) and the secondary air gap filter element (10) under normal filtering conditions; S6. When P x >P y +P θ When the inverted motor (11) outputs a real-time speed of F (V), the system delay time T is triggered at the same time. 参考 , duration T 参考 After that, the real-time output speed of the inverted motor (11) is restored to V 初始 : ； Where ΔP=P x -P y -P θ , is the basic adjustment parameter value based on the air pressure difference ΔP, is the adjustment parameter value based on the rate of change of air pressure difference, Adjust the parameter value for the filter element usage time. , t 运行 is the total running time of the filter element, k is the constant coefficient to be determined; S6.

1. The first air pressure monitoring module (12) and the second air pressure monitoring module (13) continue to monitor the air pressure. If P x >P y +P θ , the inverted motor (11) is again turned on according to the real-time monitored air pressure difference ΔP and the total running time t of the filter element 运行 Real-time output speed F (V); S6.

2. After repeating the control contents in S6.1 for no less than three times, if the air pressure difference ΔP increases continuously, the system will output a filter element blockage prompt message.

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