A gas-liquid separation device for screw-type oil-gas compression output and its process method

Abstract

The present invention discloses a gas-liquid separation device and its process method for screw-type oil-gas compression output, which relates to the technical field of oil-gas compression. In the present invention: a cooling area is formed in the area adjacent to the inner wall of the gas-liquid separation tank body in the upper flow chamber, and the bottom end of the output rotating shaft is fixedly connected to a circumferential installation kit rotatably installed below the partition plate. The bottom end of the output rotating shaft is fixedly connected to the chassis, and a plurality of primary air-gap filter elements are embedded in the circumferential side of the annular cylinder. The extension cylinder extends into the inner circumference 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. A plurality of secondary air-gap filter elements are vertically embedded and installed in the vertical cylinder. The gas-liquid separation tank body is also configured with a first air pressure monitoring module for monitoring the air pressure in the upper flow chamber and a second air pressure monitoring module for monitoring the air pressure in the discharge chamber. The present invention can maintain the filtering performance of the filter element, avoid frequent clogging of the filter element, greatly reduce the number of times of stopping the machine to clean the filter element, and ensure the efficient and smooth progress of the oil-gas compression process.

Description

Technical Field

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

[0002] After the screw compressor compresses the oil and gas, the air pressure rises significantly, resulting in liquefaction of the air flow. When the gas-liquid separation tank separates the liquid in the air flow, most of the liquid droplets in the air flow can be separated from the air flow through swirling, blocking by the inverted conical baffle of the gas-liquid separation tank, etc. However, there are still a small number of liquid droplets in the preliminarily separated air flow, which still has a certain impact on the subsequent pipeline transmission of the air flow.

[0003] The existing methods are all to directly add filters in the gas-liquid separation tank to directly filter the liquid droplets in the air flow. However, the filters are prone to blockage after long-term use, seriously affecting the normal gas-liquid filtration and separation. When the filter is blocked, the entire compression system needs to be shut down, and the filter of the gas-liquid separation tank needs to be removed for cleaning, which also affects the compression operation.

[0004] In summary, how to further reduce the blockage of the filter in the gas-liquid separation tank during the filtration and separation of the gas-liquid mixed air flow, avoid frequent shutdowns for cleaning the filter, 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] To solve the above technical problems, the present invention provides a gas-liquid separation device and a process method for screw-type oil and gas compression output, thereby maintaining the filtering performance of the filter, avoiding frequent blockage of the filter, significantly reducing the number of shutdowns for cleaning the filter, 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:

[0007] A gas-liquid separation device for screw-type oil and gas compression output includes a gas-liquid separation tank body, and the gas-liquid separation tank body is configured with an air inlet end, an air outlet end, and a top cover. Inside the gas-liquid separation tank body, there are a separation cone cylinder, a partition disk, an intake separation chamber located below the separation cone cylinder, an upper flow chamber located between the separation cone cylinder and the partition disk, and a discharge chamber located above the partition disk. Among them, the area adjacent to the inner wall of the gas-liquid separation tank body in the upper flow chamber forms a cooling area, and an annular cold liquid pipe extending into the cooling area is arranged inside the gas-liquid separation tank body. In the middle of the top cover, there is an inverted motor, and the output end of the inverted motor is configured with an output rotating shaft extending into the gas-liquid separation tank body. The bottom end of the output rotating shaft is fixedly connected to a circumferential installation kit rotatably installed below the partition disk. The circumferential installation kit includes a ring cylinder and a chassis fixedly installed on the bottom side of the ring cylinder. Among them, the bottom end of the output rotating shaft is fixedly connected to the chassis, and a plurality of first-stage air gap filter elements are embedded in the circumferential side of the ring cylinder.

[0008] A vertical installation kit is fixedly installed in the middle of the partition plate. The vertical installation kit includes a vertical cylinder and an extension cylinder located below the vertical cylinder. Among them, the extension cylinder extends into the inner circumference of the annular cylinder, and a first-stage filter chamber located below the vertical cylinder is formed between the extension cylinder, the annular cylinder, and the chassis. The first-stage air-gap filter element is communicated with the upper flow chamber and the first-stage filter chamber. A plurality of second-stage air-gap filter elements are vertically embedded and installed in the vertical cylinder. The second-stage air-gap filter elements are communicated with the first-stage filter chamber and the discharge chamber. The air-gap size of the second-stage air-gap filter elements is smaller than the air-gap size of the first-stage air-gap filter elements. The gas-liquid separation tank body is also equipped with a first air pressure monitoring module for monitoring the air pressure in the upper flow chamber and a second air pressure monitoring module for monitoring the air pressure in the discharge chamber.

[0009] As a preferred technical solution of the device of the present invention: A first thrust bearing ring is arranged between the top side surface of the circumferential installation kit and the bottom side surface of the partition plate. In the middle of the upper side of the chassis, a second thrust bearing ring located outside the output rotating shaft is arranged, and the bottom end of the extension cylinder is fixedly connected to the top side surface of the second thrust bearing ring. Through the first thrust bearing ring and the second thrust bearing ring, the circumferential installation kit can rotate freely, and at the same time, the vertical installation kit remains fixed.

[0010] As a preferred technical solution of the device of the present invention: A plurality of circumferential position installation grooves are opened on the circumferential side surface of the annular cylinder, and the first-stage air-gap filter elements are installed at the positions of the circumferential position installation grooves. The outer end face of the first-stage air-gap filter elements is concave with respect to the circumferential side surface of the annular cylinder.

[0011] As a preferred technical solution of the device of the present invention: The upper side surface of the chassis is provided with an inclined slope whose height increases towards the direction of the first-stage air-gap filter element. The liquefied droplets entering the first-stage filter chamber are thrown into the first-stage filter element along with the centrifugal force and are thrown outwards along the first-stage filter element.

[0012] As a preferred technical solution of the device of the present invention: An axial center slot is opened at the center positions of the vertical cylinder and the extension cylinder, and the output rotating shaft is movably inserted at the position of the axial center slot. The vertical cylinder is provided with a plurality of vertical installation grooves located on the circumferential side of the axial center slot, and the second-stage air-gap filter elements are installed at the positions of the vertical installation grooves.

[0013] As a preferred technical solution of the device of the present invention: The maximum total ventilation amount of the air gaps of all the second-stage air-gap filter elements is the same as the maximum total ventilation amount of the air gaps of all the first-stage air-gap filter elements, ensuring that the gas entering the first-stage filter chamber from the first-stage air-gap filter elements can efficiently pass through the second-stage air-gap filter elements, thereby improving the exhaust efficiency.

[0014] As a preferred technical solution of the device of the present invention: The cooling amount input into the upper flow chamber by the annular cold liquid pipe in real time is positively correlated with the air flow rate injected into the gas-liquid separation tank body in real time.

[0015] A gas-liquid separation process method for screw-type oil-gas compression output includes the following contents:

[0016] S1. After the screw compressor compresses the air flow, the gas-liquid mixed air flow enters the gas-liquid separation tank body, rotates upward and reaches the separation cone cylinder, and the gas-liquid mixed air flow completes the preliminary gas-liquid separation.

[0017] S2. The gas-liquid mixed air flow containing a small amount of liquid droplets enters the upper flow chamber from the bottom opening of the separation cone cylinder. The cold liquid circulating in the annular cold liquid pipe reduces the temperature of the cooling area. When the gas-liquid mixed air flow reaches near the cooling area, the condensation of liquid droplets intensifies and drips, and the liquid droplets flow downward along the separation cone cylinder and out of the upper flow chamber.

[0018] S3. The gas-liquid mixed air flow after secondary condensation enters the first-stage filter cavity through the first-stage air gap filter element, and the air flow in the first-stage filter cavity enters the discharge cavity through the second-stage air gap filter element and is discharged from the air outlet end.

[0019] Among them, when the gas-liquid mixed air flow enters the gas-liquid separation tank body, the inverted motor starts and drives the circumferentially installed kit to rotate at the initial speed V preset by the system 初始 Rotate.

[0020] S4. The first air pressure monitoring module monitors the air pressure P of the upper flow chamber in real time x , and the second air pressure monitoring module monitors the air pressure P of the discharge cavity in real time y。

[0021] S5. When P x ≤P y +P θ , the real-time output speed of the inverted motor is V 初始 .

[0022] Among them, P θ is the pressure difference generated under the normal filtration state of the first-stage air gap filter element and the second-stage air gap filter element preset by the system. When the difference between the air pressure in the upper flow chamber and the air pressure in the discharge chamber becomes larger, it indicates that the first-stage air gap filter element and the second-stage air gap filter element may be blocked. Accelerating the rotation speed of the circumferentially installed kit can throw out the residual blocked liquid droplets in the first-stage air gap filter element.

[0023] S6. When P x >P y +P θ , the real-time output speed of the inverted motor is F(V), and at the same time, the system delay duration T 参考 is triggered. After the duration T 参考 , the real-time output speed of the inverted motor resumes to V 初始 :

[0024] .

[0025] Among them, ΔP = P x -P y -P θ , is the basic adjustment parameter value based on the pressure difference ΔP. is the adjustment parameter value based on the rate of change of the pressure difference. is the adjustment parameter value for the service duration of the filter element, , t 运行 where t is the total operating duration of the filter element and k is a constant coefficient to be determined.

[0026] S6.1. The first pressure monitoring module and the second pressure monitoring module continue to monitor the pressure. If there is still P x >P y +P θ , then the inversion motor outputs the rotational speed F(V) in real time again according to the real-time monitored pressure difference ΔP and the total operating duration t of the filter element 运行 in real time.

[0027] S6.2. After repeating the control content in S6.1 no less than three times, if the pressure difference ΔP continues to increase, the system outputs a prompt message indicating that the filter element is blocked.

[0028] Compared with the existing technology, the beneficial effects of the present invention are:

[0029] 1. In the present invention, by arranging components such as a separation cone and a partition plate in the gas-liquid separation tank body, the gas-liquid mixed gas flow is first preliminarily separated by the separation cone and then enters 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 liquid droplets, reducing the amount of liquid droplets entering the filter element. Moreover, when the pressure monitoring module detects a change in the pressure difference between the upper flow chamber and the discharge chamber, the control system drives the inversion motor to linearly adjust the real-time rotational speed of the circumferential installation kit, and can timely eject the remaining blocked liquid droplets in the primary air gap filter element, thereby maintaining the filtering performance of the filter element and avoiding frequent blockages.

[0030] 2. The present invention does not need to frequently stop the machine 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 the production efficiency, reducing the time cost and economic losses brought by shutdown maintenance, enabling the entire screw type oil and gas compression system to operate stably, and meeting the continuous demand for oil and gas compression in industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the overall structural schematic diagram of the equipment of the present invention.

[0032] Figure 2 is Figure 1 the partial structural schematic diagram of the equipment in

[0033] Figure 3 is Figure 2 the partial enlarged structural schematic diagram at position A in

[0034] Figure 4 It is a schematic assembly structure diagram of the partition plate and related components in the present invention.

[0035] Figure 5 It is a schematic disassembly structure diagram of the partition plate, circumferential installation kit, primary air-gap filter element, vertical installation kit, secondary air-gap filter element and related components in the present invention.

[0036] Figure 6 For Figure 4 The bottom-side upward view of the component in

[0037] Figure 7 For Figure 5 The bottom-side upward view of the component in

[0038] Figure 8 It is a schematic structure diagram of the circumferential installation kit and the primary air-gap filter element in the present invention.

[0039] Figure 9 It is a schematic structure diagram of the vertical installation kit and the secondary air-gap filter element in the present invention.

[0040] Figure 10 For Figure 9 The bottom-side upward view of the component in

[0041] Figure 11 It is a schematic application diagram of the equipment of the present invention in a screw compression system.

[0042] Wherein: 1 - gas-liquid separation tank body, 101 - intake end, 102 - intake separation chamber, 103 - upper flow chamber, 1031 - cooling area, 104 - discharge chamber, 105 - outlet end, 106 - top cover, 2 - separation cone, 3 - partition plate; 4 - annular cold liquid pipe, 5 - first thrust bearing ring, 6 - circumferential installation kit, 601 - ring cylinder, 602 - ring installation groove, 603 - chassis, 6031 - inclined slope, 604 - primary filter chamber; 7 - primary air-gap filter element, 8 - vertical installation kit, 801 - vertical cylinder, 802 - extension cylinder, 803 - axial center slot, 804 - vertical installation groove; 9 - second thrust bearing ring, 10 - secondary air-gap filter element, 11 - inverted motor, 1101 - output rotating shaft, 12 - first air pressure monitoring module, 13 - second air pressure monitoring module. Specific Embodiments

[0043] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to 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 used to limit the present invention.

[0044] Embodiment 1. The present invention designs a gas-liquid separation device for screw-type oil-gas compression output, and the specific equipment configuration is as follows:

[0045] As Figure 1 、 Figure 2 shown in, the gas-liquid separation tank body 1 is configured 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 upper flow chamber 103, and a discharge chamber 104. The area adjacent to the inner wall of the tank body in the upper flow chamber 103 forms a cooling area 1031. An annular cold liquid pipe 4 extending into the cooling area 1031 is provided inside the tank body, and a first air pressure monitoring module 12 and a second air pressure monitoring module 13 are also configured.

[0046] As Figure 1 、 Figure 2 shown in, the separation cone 2 is located inside the gas-liquid separation tank body 1 and is used for the preliminary separation of the gas-liquid mixed gas flow.

[0047] As Figure 2 、 Figure 3 、 Figure 4 shown in, the partition plate 3 is installed inside the gas-liquid separation tank body 1, and a vertical installation kit 8 is fixedly installed in the middle.

[0048] As Figure 1 shown in, the air inlet separation chamber 102 is located below the separation cone 2 and is communicated with the air inlet end 101.

[0049] As Figure 1 、 Figure 2 shown in, the upper flow chamber 103 is located between the separation cone 2 and the partition plate 3, is communicated with the air inlet separation chamber 102, and the area adjacent to the inner wall of the tank body is the cooling area 1031.

[0050] As Figure 1 shown in, the discharge chamber 104 is above the partition plate 3 and is communicated with the air outlet end 105.

[0051] As Figure 2 shown in, the annular cold 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 chamber 103 is positively correlated with the air flow rate injected into the tank body.

[0052] As Figure 1 、 Figure 2 shown in, the inverted motor 11 is installed in the middle of the top cover 106, and the output end is configured with an output rotating shaft 1101 extending into the gas-liquid separation tank body 1.

[0053] As Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 、 Figure 9 shown in, the output rotating shaft 1101 is connected to the output end of the inverted motor 11, the bottom end is fixedly connected to the chassis 603 of the circumferential installation kit 6, and is also movably inserted at the position of the axial slot 803 of the vertical installation kit 8.

[0054] As Figure 3 、 Figure 5 、 Figure 7 、 Figure 8 , the circumferential installation kit 6 includes a ring cylinder 601 and a chassis 603. A plurality of first air gap filter elements 7 are embedded on the circumferential side of the ring cylinder 601. The chassis 603 is fixedly connected to the bottom end of the output rotating shaft 1101. A first thrust bearing ring 5 is arranged between the top side surface of the chassis 603 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 cylinder 802. An inclined slope 6031 is provided on the upper side surface of the chassis 603.

[0055] As Figure 2 、 Figure 3 、 Figure 8 , the first air gap filter element 7 is installed at the position of the circumferential installation groove 602 of the ring cylinder 601. The outer end face is recessed from the circumferential side surface of the ring cylinder 601 and is communicated with the upstream cavity 103 and the first filter cavity 604.

[0056] As Figure 3 、 Figure 5 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 , the vertical installation kit 8 includes a vertical cylinder 801 and an extension cylinder 802. The extension cylinder 802 extends into the inner circumference of the ring cylinder 601 and forms a first filter cavity 604 with the ring cylinder 601 and the chassis 603. A plurality of second air gap filter elements 10 are vertically embedded and installed in the vertical cylinder 801. An axial slot 803 is provided at the central position of the vertical cylinder 801 and the extension cylinder 802. A plurality of vertical installation grooves 804 are provided on the vertical cylinder 801. The second air gap filter elements 10 are installed here. The second air gap filter elements 10 are communicated with the first filter cavity 604 and the discharge cavity 104, and the air gap size is smaller than that of the first air gap filter elements 7. The maximum total ventilation volume of the air gaps of all the second air gap filter elements 10 is the same as the maximum total ventilation volume of the air gaps of all the first air gap filter elements 7.

[0057] As Figure 3 、 Figure 5 、 Figure 7 , the first thrust bearing ring 5 is arranged between the top side surface of the circumferential installation kit 6 and the bottom side surface of the partition plate 3 to ensure the free rotation of the circumferential installation kit 6.

[0058] As 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 around the output rotating shaft 1101 to keep the vertical installation kit 8 fixed.

[0059] As 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.

[0060] 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.

[0061] like Figure 7 , Figure 9 , Figure 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.

[0062] like Figure 9 , Figure 10 , Vertical mounting groove 804: located on the ring side of the axial slot 803 of the vertical cylinder 801, used for mounting the secondary air gap filter element 10.

[0063] Embodiment 2: The present invention also designs a gas-liquid separation process method for screw-type oil and gas compression output, and the specific process method is:

[0064] Step 1: Initial separation

[0065] 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.

[0066] Step 2: Secondary condensation and dripping

[0067] 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.

[0068] Step 3: Filtration and discharge:

[0069] The gas-liquid mixed gas flow after secondary condensation passes through the primary air-gap filter element 7 at a relatively stable speed for filtration. The air-gap size of the primary air-gap filter element 7 is designed according to the oil-gas characteristics and the expected filtration accuracy (such as 0.1 - 0.5 mm). Tiny liquid droplets in the gas flow are blocked by the filter element, and the filtered gas flow enters the primary filter chamber 604. In the primary filter chamber 604, after a short stay and buffering, the gas flow 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 - 0.2 mm) to ensure that the liquid droplets in the gas are fully filtered. The filtered pure gas enters the discharge chamber 104 and is discharged from the air outlet 105, entering the subsequent gas treatment or transportation process. During the whole process, when the gas-liquid mixed gas flow enters the gas-liquid separation tank body 1, the control system simultaneously starts the inverted motor 11, driving the circumferential installation kit 6 to rotate at the initial speed V preset by the system 初始 to provide the power basis for the subsequent anti-clogging operation of the filter element.

[0070] Step Four: Air Pressure Monitoring and Motor Speed Control:

[0071] The first air pressure monitoring module 12 and the second air pressure monitoring module 13 continuously and real-time monitor the air pressure P x in the upstream chamber 103 and the air pressure P y in the discharge chamber 104, and transmit the data to the control system. The control system collects and analyzes the data once per second.

[0072] Case One: When P x ≤P y +P θ , the real-time output speed of the inverted motor 11 is V 初始 .

[0073] Among them, P θ is the pressure difference generated under the normal filtration state of the primary air-gap filter element 7 and the secondary air-gap filter element 10 preset by the system.

[0074] Case Two: When P x >P y +P θ , the real-time output speed of the inverted motor 11 is F(V), and at the same time, the system delay duration T 参考 is triggered. After the duration T 参考 , the real-time output speed of the inverted motor 11 resumes to V 初始 :

[0075] .

[0076] ΔP = P x - P y - P θ , is the basic adjustment parameter value based on the pressure difference ΔP.

[0077] is the adjustment parameter value based on the rate of change of air pressure difference. When the rate of change of air pressure difference is large, this function can quickly increase the motor speed to effectively deal with the sudden blockage of the filter element.

[0078] is the adjustment parameter value for the service duration of the filter element. , t 运行 is the total operating duration of the filter element, and k is a constant coefficient to be determined. As t 运行 increases, the function value gradually increases, prompting the speed of the inverted motor to rise slowly, compensating for the reduced filtering capacity of the filter element due to the increase in usage time, preventing filter blockage. When the total operating duration of the filter element is relatively long and reaches the specified time for replacement, even if the system does not report a blockage fault, the filter element should be replaced or cleaned in a timely manner.

[0079] Re - monitoring and driving: The first air pressure monitoring module 12 and the second air pressure monitoring module 13 continue to monitor the air pressure. If there is still P x >P y +P θ , then the inverted motor 11 outputs the rotational speed F(V) in real - time according to the real - time monitored air pressure difference ΔP and the total operating duration t 运行 of the filter element.

[0080] Finally, after repeating the control content of the above re - monitoring and driving process no less than three times, if the air pressure difference ΔP continuously increases (for example, the increase amplitude exceeds 0.02 MPa for three consecutive times), the system determines that the blockage of the filter element is relatively serious, outputs a filter element blockage prompt message, and reminds the operator to perform filter element maintenance or replacement. The prompt message can be sent through an audible and visual alarm device or displayed on the control system display screen to ensure the stable operation of the equipment and the gas - liquid separation effect.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall 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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