Filtering, coalescence, separation and oil removal system and separation performance monitoring method therefor

Abstract

Provided in the present disclosure are a filtering, coalescence, separation and oil removal system and a separation performance monitoring method therefor. A support body in a filter element support member is arranged at the upper end of a pipe body; a guide transition section in a coalescence filter element is detachably arranged at the upper end of a coalescence filtering section, the coalescence filtering section and the guide transition section are both sleeved outside of the support body, and a locking nut locks the support body and the guide transition section; and an air inlet connecting pipe and / or an air outlet connecting pipe are connected to an online separation performance monitoring system, and the monitoring system comprises a medium state equivalent converter, a flow meter and an online droplet particle concentration monitor. By means of the present disclosure, the technical problem of an increase in a pressure drop caused by a baffle arranged at an outlet of a filtering, coalescence and separation apparatus, or inconvenient operations and maintenance caused by a long distance between a filter element and a quick-opening blind flange port is solved; a separation performance test can be analyzed in a timely manner to provide data support for separation performance evaluation and performance optimization and improvement of a device; and the interference of the providing of a measurement channel on a medium flowing state is reduced by means of the medium state equivalent converter.

Description

Filtration-coalescing-separation oil removal system and its separation performance monitoring method

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202410520154.7, filed on April 26, 2024, and incorporates the disclosure of the aforementioned patent application as part of this application. Technical Field

[0003] This disclosure relates to the field of petroleum and natural gas chemical technology and equipment, and in particular to a filtration coalescence separation and oil removal system and a method for monitoring its separation performance. Background Technology

[0004] In the oil and gas chemical industry, various process gases are inevitably mixed with solid and liquid impurities such as water, condensate oil, hydrocarbons, lubricating oil, sand, and rust during collection, transportation, and processing due to various factors. These impurities have many adverse effects on downstream production processes, such as: reduced yield and quality due to blockage of catalytic beds and increased maintenance difficulty; and liquid droplets, mainly lubricating oil, carried in the natural gas outlet of the gas injection compressor in the gas storage facility, causing gas quality pollution in underground gas storage facilities.

[0005] To remove different impurities from gases, filtration and separation equipment with different principles and structures is required, such as oil-gas separators, cyclone separators, filter separators, and coalescers. Filter coalescing separation oil removers are specialized equipment that uses filtration coalescing separation technology to remove oil impurities, mainly oil, from gases. Currently, there are problems such as the outlet baffle causing increased pressure drop, or the filter element being far from the quick-opening blind flange port, making operation and maintenance inconvenient. Summary of the Invention

[0006] The purpose of this disclosure is to provide a filtration coalescing separation and oil removal system and a method for monitoring its separation performance, in order to solve the technical problems of increased pressure drop caused by the baffle at the outlet of the filtration coalescing separation device, or inconvenient operation and maintenance caused by the long distance between the filter element and the quick-opening blind plate. It can realize timely analysis and separation performance testing, provide data support for equipment separation performance evaluation and performance optimization, and reduce the interference of setting up measurement channels on the medium flow state by using a medium state equivalent converter.

[0007] The above-mentioned objectives of this disclosure can be achieved by the following technical solutions:

[0008] This disclosure provides a filtration coalescing separation and oil removal system, including: a filtration coalescing separation and oil removal device, an air inlet pipe, and an air outlet pipe;

[0009] The filter coalescing separator includes a cylinder, a tube sheet, and a coalescing filter element mechanism. The tube sheet divides the inner cavity of the cylinder into an upper chamber and a lower chamber. The tube sheet is provided with tube sheet through holes. The coalescing filter element mechanism is disposed in the tube sheet through holes and is at least partially located in the upper chamber.

[0010] The side wall of the cylinder is provided with an air outlet that communicates with the upper chamber, and the air outlet pipe is connected to the air outlet.

[0011] The side wall of the cylinder is provided with an air inlet that communicates with the lower chamber, and the air inlet pipe is connected to the air inlet;

[0012] The coalescing filter element mechanism includes a filter element support, a coalescing filter element, and a locking nut.

[0013] The filter element support includes a tube body and a support body. The support body is located at the upper end of the tube body, and the tube body is connected to the tube sheet through hole and communicates with the lower chamber.

[0014] The coalescing filter element includes a coalescing filter section and a guide transition section. The guide transition section is detachably disposed at the upper end of the coalescing filter section. Both the coalescing filter section and the guide transition section are sleeved on the support body. The inner cavity of the coalescing filter section is connected to the tube body. Furthermore, a locking nut is connected to the upper end of the support body to lock the support body and the guide transition section.

[0015] The coalescing filter section is located below the air outlet, while the guide transition section and the support body extend upwards to above or near the air outlet.

[0016] In an optional embodiment, the support includes a wing segment and a column guide segment, the column guide segment being disposed at the upper end of the wing segment, the wing segment having multiple circumferentially distributed fins; a coalescing filter segment is sleeved outside the wing segment, and a guiding transition segment is sleeved outside the column guide segment.

[0017] In an optional embodiment, the cross-section of the inner cavity of the coalescing filter section is larger than the cross-section of the inner cavity of the guide transition section, and the cross-section of the outer contour of the wing segment is larger than the cross-section of the inner cavity of the guide transition section.

[0018] In an optional embodiment, a sealing ring is fixed to the upper end of the tube body, the fin segment is fixed to the sealing ring, and the lower end of the coalescing filter section is sealed to the sealing ring.

[0019] In an optional embodiment, the column guide section extends upward beyond the guide transition section, the locking nut is screwed onto the column guide section and abuts against the upper end of the guide transition section, and a sealing gasket is provided between the locking nut and the guide transition section.

[0020] In an optional embodiment, the tube sheet is provided with multiple tube sheet through holes, and the number of coalescing filter elements is equal to the number of tube sheet through holes, with each coalescing filter element being disposed in a corresponding manner in the tube sheet through holes.

[0021] In an optional embodiment, the inlet pipe is connected to an online separation performance monitoring system, and / or the outlet pipe is connected to an online separation performance monitoring system; the online separation performance monitoring system includes a media state equivalent converter, a flow meter, and an online droplet concentration monitor, the media state equivalent converter is connected to the inlet pipe or the outlet pipe, and the flow meter and the online droplet concentration monitor are both installed on the media state equivalent converter.

[0022] In an optional embodiment, the medium state equivalent converter includes a main medium pipeline and a sampling and measurement pipeline, with the equivalent converter installed inside the main medium pipeline; both ends of the sampling and measurement pipeline are connected to the main medium pipeline, and the connection points between the two ends of the sampling and measurement pipeline and the main medium pipeline are located upstream and downstream of the equivalent converter, respectively; a flow meter and an online droplet particle concentration monitor are both installed on the sampling and measurement pipeline.

[0023] In an optional embodiment, the equivalent converter includes a flow obstruction element, which is provided with one or more medium flow passages. The sum of the medium flow cross-sectional area of ​​the medium flow passages and the medium flow cross-sectional area of ​​the sampling and measurement pipeline is equal to the cross-sectional area of ​​the air inlet or equal to the cross-sectional area of ​​the air outlet.

[0024] This disclosure provides a method for monitoring the separation performance of a filtration coalescing separation and oil removal system, used in the aforementioned filtration coalescing separation and oil removal system. The method for monitoring the separation performance includes:

[0025] The concentration and flow rate of droplets in the inlet and outlet pipes are monitored online, and data are collected and recorded at a set sampling frequency.

[0026] Based on the recorded droplet concentration and flow rate data, calculate and record the real-time separation efficiency, cumulative oil removal volume, time-period separation efficiency, and discharge ratio.

[0027] The features and advantages of this disclosure are:

[0028] The coalescing filter element's coalescing filtration section is located below the air outlet, avoiding the short-circuiting phenomenon that can easily occur when the filtration area of ​​the coalescing filter element is directly opposite the air outlet, preventing gas from flowing through the upper part of the filter element. This eliminates the need for a baffle at the air outlet to prevent short-circuiting and avoids the problem of increased pressure drop caused by a baffle at the air outlet. At the same time, the guiding transition section of the coalescing filter element extends upward to above or near the air outlet, thus being close to the top of the cylinder. This facilitates the installation and removal of the coalescing filter element through the top opening of the cylinder. Because the operating space is raised to the top of the cylinder, operation can be performed without entering the enclosed space inside the cylinder, making it convenient and safe.

[0029] When the filter element needs to be replaced, the entire coalescing filter element is pulled out from the filter element support, and the coalescing filter section and guide transition section are disassembled. A new coalescing filter section is installed and connected to the original guide transition section. The guide transition section does not need to be replaced and can be reused. The filtration coalescing separation and oil removal system provided in this disclosure can ensure good coalescing filtration performance, convenient operation and maintenance, and save maintenance costs.

[0030] By monitoring the droplet concentration and flow rate at the inlet and / or outlet pipes online, performance parameters such as the real-time separation efficiency, time-period separation efficiency, and cumulative oil removal volume of the filter coalescing separator can be calculated based on the monitored data. Furthermore, the use of a media state equivalent converter reduces interference from the media flow state caused by setting up measurement channels. It eliminates the need to select flow meters and droplet concentration online monitoring instruments of the same specifications as the inlet and outlet pipes, allowing smaller flow meters or droplet concentration online monitoring instruments to meet the sampling and monitoring needs of filter coalescing separators with inlet or outlet pipes of different diameters. This removes the limitation imposed by the diameter of the inlet and outlet pipes on instrument selection. Using the filter coalescing separator oil removal system provided in this disclosure, timely analysis and testing of separation performance can be achieved, providing data support for equipment separation performance evaluation and performance optimization. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 is an overall schematic diagram of the filtration coalescence separation and oil removal system provided in this disclosure;

[0033] Figure 2 is a schematic diagram of the filter coalescing separation oil separator in the filter coalescing separation oil removal system provided in this disclosure;

[0034] Figure 3 is a partial enlarged view of the filter coalescing separation oil separator in the filter coalescing separation oil removal system provided in this disclosure;

[0035] Figure 4 is an exploded schematic diagram of the coalescing filter element mechanism in the filtration coalescing separation and oil removal system provided in this disclosure;

[0036] Figure 5 is a schematic diagram of the filter element support in the filtration coalescence separation and oil removal system provided in this disclosure;

[0037] Figure 6 is a schematic diagram of the coalescing filter element mechanism in the filtration coalescing separation and oil removal system provided in this disclosure;

[0038] Figure 7 is an installation diagram of the coalescing filter element mechanism in the filtration coalescing separation and oil removal system provided in this disclosure;

[0039] Figure 8 is a partial cross-sectional view of the coalescing filter element mechanism in the filtration coalescing separation and oil removal system provided in this disclosure;

[0040] Figure 9 is a partial cross-sectional view of the coalescing filter element mechanism in the filtration coalescing separation and oil removal system provided in this disclosure;

[0041] Figure 10 is a partial cross-sectional view of the coalescing filter element mechanism in the filtration coalescing separation and oil removal system provided in this disclosure;

[0042] Figure 11 is a partial schematic diagram of the filtration coalescence separation and oil removal system provided in this disclosure;

[0043] Figure 12 is a partial enlarged view of the online monitoring system for separation performance in the filtration coalescence separation and oil removal system provided in this disclosure;

[0044] Figure 13 is a partially enlarged view of one embodiment of the media state equivalent converter in the filtration coalescence separation and oil removal system provided in this disclosure;

[0045] Figure 14 is a partially enlarged view of another embodiment of the media state equivalent converter in the filtration coalescence separation and oil removal system provided in this disclosure;

[0046] Figure 15 is a schematic diagram of the online monitoring system for separation performance in the filtration coalescence separation and oil removal system provided in this disclosure;

[0047] Figure 16 is a flowchart of the separation performance monitoring method of the filtration coalescence separation and oil removal system provided in this disclosure.

[0048] Reference numerals: 1. Filter coalescing separator; 11. Quick-opening blind flange; 13. End cap; 12. Cylinder; 121. Upper chamber; 122. Lower chamber; 14. Air inlet pipe; 15. Pre-separation assembly; 16. Coalescing filter element mechanism; 161. Tube sheet; 1611. Tube sheet through hole; 162. Filter element support; 1621. Tube body; 1622. Sealing ring; 1626. Support body; 1623. Fin segment; 1624. Column guide section; 1625. Cotter pin; 163. Coalescing filter element; 1631. Coalescing filtration section; 16311. Covered end; 16312. Through-hole external threaded connector; 1632. Guide transition section; 16321. Through-hole internal threaded connector; 16322. Hollow guide tube; 164. Sealing gasket; 165. Locking nut; 17. Outlet port connector; 171. Outlet; 18. Drain port connector; 19. Skirt; 2. Online separation performance monitoring system; 21. Medium state equivalent converter; 211. Inlet medium state equivalent converter; 212. Outlet medium state equivalent converter; 2111. Main medium pipeline; 21111. Equivalent converter; 2112. Sampling and measurement pipeline; 2113. Connecting pipeline; 2114. Connecting pipeline; 22. Flow meter; 221. Inlet flow meter; 222. Outlet flow meter; 23. Online droplet particle concentration monitor; 231. Inlet droplet particle concentration monitor; 232. Outlet droplet particle concentration monitor; 24. Performance calculation and analysis unit; 25. Signal cable; 26. Signal box. Detailed Implementation

[0049] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0050] Option 1

[0051] This disclosure provides a filtration coalescing separation oil removal system, as shown in Figures 1-11, including: a filtration coalescing separation oil remover 1, an air inlet pipe 14, and an air outlet pipe 17.

[0052] The filter coalescing separator 1 includes a cylinder 12, a tube sheet 161, and a coalescing filter element mechanism 16. The tube sheet 161 divides the inner cavity of the cylinder 12 into an upper chamber 121 and a lower chamber 122. The tube sheet 161 is provided with a tube sheet through hole 1611. The coalescing filter element mechanism 16 is disposed in the tube sheet through hole 1611 and is at least partially located in the upper chamber 121.

[0053] The side wall of the cylinder 12 is provided with an air outlet 171 that communicates with the upper chamber 121, and the air outlet pipe 17 is connected to the air outlet 171.

[0054] The side wall of the cylinder 12 is provided with an air inlet (not shown in the figure) that communicates with the lower chamber 122, and the air inlet pipe 14 is connected to the air inlet;

[0055] The coalescing filter element mechanism 16 includes a filter element support 162, a coalescing filter element 163, and a locking nut 165.

[0056] The filter element support 162 includes a tube body 1621 and a support body 1626. The support body 1626 is disposed at the upper end of the tube body 1621. The tube body 1621 is connected to the tube plate through hole 1611 and communicates with the lower chamber 122.

[0057] The coalescing filter element 163 includes a coalescing filter section 1631 and a guide transition section 1632. The guide transition section 1632 is detachably disposed at the upper end of the coalescing filter section 1631. Both the coalescing filter section 1631 and the guide transition section 1632 are sleeved on the outside of the support body 1626. The inner cavity of the coalescing filter section 1631 is connected to the tube body 1621. Furthermore, a locking nut 165 is connected to the upper end of the support body 1626 to lock the support body 1626 and the guide transition section 1632.

[0058] The coalescing filter section 1631 is located below the air outlet 171, and the guide transition section 1632 and the support body 1626 both extend upward to above or near the air outlet 171.

[0059] In the filtration coalescence separation and oil removal system provided in this disclosure, the coalescence filtration section 1631 of the coalescence filter element 163 is located below the air outlet 171. This avoids the short-circuiting phenomenon that easily occurs when the filtration area of ​​the coalescence filter element 163 faces the air outlet 171, preventing the gas from flowing through the upper part of the filter element. This eliminates the need to install a baffle at the air outlet 171 to prevent short-circuiting and avoids the problem of increased pressure drop caused by installing a baffle at the air outlet 171. At the same time, the guide transition section 1632 of the coalescence filter element 163 extends upward to above or near the air outlet 171, thus approaching the top of the cylinder 12. This facilitates the installation and removal of the coalescence filter element 163 through the top opening of the cylinder 12. Since the operating space is raised to the top of the cylinder 12, operation in the enclosed space without entering the cylinder 12 is achieved, which is convenient and safe.

[0060] When the filter element needs to be replaced, the coalescing filter element 163 is pulled out entirely from the filter element support 162, and the coalescing filter section 1631 and the guide transition section 1632 are disassembled. A new coalescing filter section 1631 is replaced and connected to the original guide transition section 1632. The guide transition section 1632 does not need to be replaced and can be reused. The filtration coalescing separation and oil removal system provided by this disclosure can ensure good coalescing filtration performance, convenient operation and maintenance, and save maintenance costs.

[0061] As shown in Figure 2, a quick-opening blind flange 11 is provided at the top of the cylinder 12. The filter coalescing separator 1 can be a quick-opening filter coalescing separator 1. Optionally, the filter coalescing separator 1 includes a head 13, a pre-separation component 15, a drain port pipe 18, and a skirt seat 19, etc. The quick-opening filter coalescing separator 1 has a vertical structure with bottom inlet and top outlet. The quick-opening blind flange 11 and the head 13 are respectively welded to the upper and lower ends of the cylinder 12. After the tube sheet 161 is welded to the middle of the cylinder 12, the cylinder 12 is divided into an upper chamber 121 and a lower chamber 122. The upper chamber 121 is equipped with a coalescing filter element mechanism 16, and the lower chamber 122 is equipped with a pre-separation component 15. The pre-separation component 15 can be a blade component type equal-height liquid removal separation device. An air inlet pipe 14 is welded to the middle of the side of the lower chamber 122 of the cylinder 12 and communicates with the lower chamber 122. An air outlet pipe 17 is welded to the upper part of the side of the upper chamber 121 of the cylinder 12 and communicates with the upper chamber 121. A drain pipe 18 is welded to the bottom of the side of the upper chamber 121 of the cylinder 12 and the bottom of the end cap 13, respectively. A skirt 19 is welded to the lower part of the cylinder 12 to support the entire device.

[0062] In one embodiment, the support 1626 includes a fin segment 1623 and a column guide segment 1624. The column guide segment 1624 is disposed at the upper end of the fin segment 1623, and the fin segment 1623 has multiple circumferentially distributed fins. The coalescing filter segment 1631 is sleeved on the outside of the fin segment 1623, and the guide transition segment 1632 is sleeved on the outside of the column guide segment 1624. The filter element support 162 has a three-section structure. The fin segment 1623 can not only support the coalescing filter segment 1631, but also guide the airflow upward smoothly, thereby improving the coalescing filter effect.

[0063] Furthermore, the cross-sectional area of ​​the inner cavity of the coalescing filter section 1631 is larger than that of the inner cavity of the guide transition section 1632, and the cross-sectional area of ​​the outer contour of the fin segment 1623 is larger than that of the inner cavity of the guide transition section 1632. The inner cavity of the guide transition section 1632 of the coalescing filter element 163 is smaller and does not extend to the fin segment 1623. The outer contour of the guide transition section 1632 can also be designed to be relatively small, which can both ensure that the operating space for disassembling and assembling the coalescing filter element 163 is raised to the end of the quick-opening blind plate 11 for easy disassembly and maintenance, and reduce the space occupied by the guide transition section 1632.

[0064] In one embodiment, a sealing ring 1622 is fixedly connected to the upper end of the tube body 1621, the fin segment 1623 is fixedly connected to the sealing ring 1622, and the lower end of the coalescing filter section 1631 is sealed to the sealing ring 1622. The sealing ring 1622 facilitates the connection between the fin segment 1623 and the tube body 1621, and also ensures the sealing performance between the coalescing filter section 1631 and the tube body 1621.

[0065] In one embodiment, as shown in Figures 4-10, the filter element support 162 has a three-section structure. The first section is welded from a tube body 1621 and a sealing ring 1622. The second section is a finned segment 1623, and the third section is a cylindrical guide segment 1624. One end of the finned segment 1623 passes through the central hole of the sealing ring 1622 and is welded to the inner wall of the tube body 1621. The lower end of the cylindrical guide segment 1624 is connected to the finned segment 1623 by a cotter pin 1625. The three sections of the filter element support 162 can be connected by welding, threading, or hinge. The cylindrical guide segment 1624 can be a cylindrical guide segment, and the tube body 1621 can be a cylindrical steel tube. The outer diameter of one end of the tube body 1621 of the first section of the filter element support 1622 is clearance-fitted with the inner diameter of the tube sheet through hole 1611 and inserted into the tube sheet through hole 1611 before welding. The finned segment 1623 can be a three-legged fin.

[0066] Optionally, as shown in Figures 4-10, the coalescing filter element 163 is a two-section composite cylindrical structure. The first section is the coalescing filter section 1631, with an open lower end and a covered end 16311 at the upper end. The covered end 16311 has a through-hole external threaded connector 16312 in the middle. The second section is the guide transition section 1632, which is welded together with the through-hole internal threaded connector 16321 and the hollow guide tube 16322. The through-hole external threaded connector 16312 is matched and fastened to the through-hole internal threaded connector 16321.

[0067] Furthermore, the column guide section 1624 extends upward to the outside of the guide transition section 1632. The locking nut 165 is screwed onto the column guide section 1624 and abuts against the upper end of the guide transition section 1632. A sealing gasket 164 is provided between the locking nut 165 and the guide transition section 1632. The upper end of the column guide section 1624 is threaded, and the sealing gasket 164 and the locking nut 165 are installed at this end. After the locking nut 165 is removed, the coalescing filter element 163 can be pulled out from the filter element support 162 as a whole, which facilitates disassembly and assembly operations in the top area of ​​the cylinder 12. Moreover, after installation, the reliability of the connection between the coalescing filter element 163 and the filter element support 162 can be guaranteed.

[0068] Optionally, the outer edge of the fin segment 1623 of the filter element support 162 is clearance-fitted with the inner diameter of the coalescing filter section 1631 of the coalescing filter element 163. After the coalescing filter element 163 is fitted onto the filter element support 162, it is sealed and fastened by the sealing gasket 164 and the locking nut 165.

[0069] After the filter coalescing separator oil remover 1 is installed in place, the coalescing filter section 1631 of the coalescing filter element 163 is located below the air outlet 171, which avoids the short circuit phenomenon that the gas that is easily formed when the filter element is directly facing the air outlet 171 does not flow through the upper part of the filter element, and there is no need to set a baffle at the air outlet 171 to prevent short circuit; at the same time, the end of the guide transition section 1632 of the coalescing filter element 163 is close to the opening of the quick-opening blind plate 11, which raises the operation space for disassembling and installing the filter element to the end of the quick-opening blind plate 11, eliminating the closed space operation inside the cylinder 12, which is convenient and safe. When the coalescing filter element 163 needs to be replaced, pull the entire coalescing filter element 163 out of the filter element support 162, loosen the threads between the through-hole external threaded connector 16312 and the through-hole internal threaded connector 16321, replace the new coalescing filter section 1631, while the guide transition section 1632 does not need to be replaced and can be reused. Then tighten the matching through-hole external threaded connector 16312 and through-hole internal threaded connector 16321 to form a new coalescing filter element 163.

[0070] The tube sheet 161 can have one or more through holes 1611. In one embodiment, the tube sheet 161 is provided with multiple through holes 1611, and the number of coalescing filter element mechanisms 16 is equal to the number of through holes 1611, with each coalescing filter element mechanism 16 corresponding to one of the through holes 1611. As shown in Figures 3-5, the tube sheet 161 has multiple through holes 1611, and the number of filter element support members 162 is equal to the number of through holes 1611. The tube sheet 161 can be made of a circular metal plate.

[0071] In one embodiment, the filtration coalescence separation and oil removal system provided in this disclosure includes an online separation performance monitoring system 2. Specifically, the inlet pipe 14 is connected to the online separation performance monitoring system 2, and / or the outlet pipe 17 is connected to the online separation performance monitoring system 2.

[0072] The separation performance online monitoring system 2 includes a medium state equivalent converter 21, a flow meter 22, and a droplet particle concentration online monitor 23. The medium state equivalent converter 21 is connected to the inlet pipe 14 or the outlet pipe 17. The flow meter 22 and the droplet particle concentration online monitor 23 are both installed on the medium state equivalent converter 21.

[0073] By monitoring the droplet concentration and flow rate at the inlet pipe 14 and / or outlet pipe 17 online, real-time performance parameters such as the separation efficiency, time-period separation efficiency, and cumulative oil removal volume of the filter coalescing separator 1 can be calculated based on the monitored data. Alternatively, predicted performance parameters such as the separation efficiency, time-period separation efficiency, and cumulative oil removal volume of the filter coalescing separator 1 can be calculated by inputting the predicted values ​​from the monitoring data. Furthermore, the medium state equivalent converter 21 reduces the interference of setting up the measurement channel on the medium flow state, eliminating the need to select flow meters 22 and droplet concentration online monitoring instruments 23 of the same specifications as those at the inlet pipe 14 and outlet pipe 17. This allows small-sized flow meters 22 or droplet concentration online monitoring instruments 23 to meet the sampling and monitoring needs of filter coalescing separators 1 with different diameters of inlet pipe 14 or outlet pipe 17, thus eliminating the limitation on instrument selection based on the diameter of the inlet pipe 14 and outlet pipe 17. The filtration coalescence separation and oil removal system provided in this disclosure enables timely analysis and testing of separation performance, providing data support for equipment separation performance evaluation and performance optimization.

[0074] In one embodiment, the medium state equivalent converter 21 includes a main medium pipeline 2111 and a sampling and measurement pipeline 2112. The equivalent converter 21111 is installed inside the main medium pipeline 2111. Both ends of the sampling and measurement pipeline 2112 are connected to the main medium pipeline 2111, and the connection points between the two ends of the sampling and measurement pipeline 2112 and the main medium pipeline 2111 are located upstream and downstream of the equivalent converter 21111, respectively. The flow meter 22 and the droplet concentration online monitoring instrument 23 are both installed in the sampling and measurement pipeline 2112. The equivalent converter 21111 is used to convert fluid parameters and states such as flow rate, pressure drop, and droplet state during sampling into values ​​consistent with those at the original coalescer inlet or outlet 171, ensuring measurement accuracy.

[0075] Furthermore, the equivalent converter 21111 includes a flow-blocking element with one or more medium flow passages. The sum of the medium flow cross-sectional area of ​​the medium flow passages and the medium flow cross-sectional area of ​​the sampling and measurement pipe 2112 is equal to the cross-sectional area of ​​the air inlet or the cross-sectional area of ​​the air outlet 171. This ensures that the total medium flow cross-sectional area of ​​the equivalent converter 21 connected to the air inlet pipe 14 is equal to the cross-sectional area of ​​the air inlet, and the total medium flow cross-sectional area of ​​the equivalent converter 21 connected to the air outlet pipe 17 is equal to the cross-sectional area of ​​the air outlet 171. This reduces the interference of the measurement channel on the medium flow state, thus ensuring measurement accuracy. The flow-blocking element can be plate-shaped, ring-shaped, or other shapes.

[0076] Optionally, both the inlet pipe 14 and the outlet pipe 17 are connected to the online separation performance monitoring system 2. The medium state equivalent converter 21 includes an inlet medium state equivalent converter 211 and an outlet medium state equivalent converter 212. The flow meter 22 includes an inlet flow meter 221 and an outlet flow meter 222. The droplet particle concentration online monitor 23 includes an inlet droplet particle concentration online monitor 231 and an outlet droplet particle concentration online monitor 232.

[0077] Taking the inlet medium state equivalent converter 211 as an example, the structure and connection structure of the medium state equivalent converter 21 are introduced.

[0078] As shown in Figure 11-12, the inlet medium state equivalent converter 211 is installed on the inlet pipe 14 via a flange. The inlet medium state equivalent converter 211 is an irregularly shaped pipe fitting, consisting of a main medium pipe 2111, a sampling and measurement pipe 2112, a connecting pipe 2113, and a connecting pipe 2114. The main medium pipe 2111 is directly connected to the inlet pipe 14, and both have the same diameter. The sampling and measurement pipe 2112 is parallel to the main medium pipe 2111, and is connected upstream and downstream by connecting pipes 2113 and 2114 respectively. The inlet flow meter 221 is installed on the sampling and measurement pipe 2112, and an inlet droplet concentration online monitoring instrument 231 is installed downstream of it. The sampling and measurement pipe 2112, connecting pipe 2113, connecting pipe 2114, inlet flow meter 221, and inlet droplet concentration online monitoring instrument 231 are all small-sized components (DN50 or below) for easy selection.

[0079] As shown in Figures 13 and 14, an equivalent converter 21111 is installed on the inner wall of the main medium pipeline 2111. The equivalent converter 21111 ensures that the flow velocity and pressure drop of the medium in the main pipeline remain constant. The equivalent converter 21111 can take various structural forms, such as a single-hole plate, a multi-hole plate, or a non-perforated plate. For example, Figure 13 shows a single-hole plate, and Figure 14 shows a multi-perforated plate. The sum of the medium flow cross-sectional area of ​​the equivalent converter 21111 and the medium flow cross-sectional area of ​​the sampling and measurement pipeline 2112 is equal to the inlet cross-sectional area.

[0080] The outlet medium state equivalent converter 212, outlet flow meter 222, and outlet droplet particle concentration online monitor 232 adopt the same or similar structure as the inlet end. The outlet medium state equivalent converter 212 is installed on the outlet pipe 17 via a flange. The main medium pipeline 2111 is directly connected to the outlet pipe 17, and the two have the same pipe diameter.

[0081] As shown in Figure 11, the online separation performance monitoring system 2 also includes a performance calculation and analysis unit 24, a signal cable 25, and a signal box 26. The online droplet concentration monitor 23 uses optical, microwave, or other principles to monitor the concentration of droplets carried in the flowing natural gas. The signal cable 25 connects the online droplet concentration monitor 23, the flow meter 22, and the performance calculation and analysis unit 24, which is installed inside the signal box 26. Specifically, as shown in Figure 15, the inlet flow meter 221, the outlet flow meter 222, the inlet droplet concentration monitor 231, and the outlet droplet concentration monitor 232 transmit the collected data to the performance calculation and analysis unit 24. After receiving the set parameters and commands through the input module, the performance calculation and analysis unit 24 begins to calculate and analyze the parameters and outputs the results to the display unit.

[0082] The filtration coalescing separation and oil removal system provided in this disclosure can obtain performance parameters such as real-time separation efficiency, time-period separation efficiency, cumulative oil removal volume, and discharge timing of the filtration coalescing separation oil remover 1 by programming and building a built-in separation performance monitoring method.

[0083] The filtration coalescence separation and oil removal system provided in this disclosure has advantages such as compact structure, high separation efficiency, low pressure drop, convenient operation and maintenance, and the ability to achieve online monitoring of separation performance and real-time data analysis. Specifically, the advantages of the filtration coalescence separation and oil removal system provided in this disclosure are:

[0084] (1) It solves the problem that the performance of the filter coalescing separation oil remover 1 cannot be achieved at the same time as the ease of operation and maintenance.

[0085] The two-stage composite coalescing filter element 163 and its installation components can place the entire coalescing filter element 163 below the air outlet 171, avoiding the increased pressure drop caused by setting a baffle at the air outlet or the short circuit caused by placing the filter element directly opposite the air outlet 171. At the same time, the operating space for disassembling and assembling the coalescing filter element 163 is raised to the end of the quick-opening blind flange 11, eliminating the need to enter the closed space inside the cylinder 12 for operation, making it convenient and safe.

[0086] (2) Realize online monitoring of the oil removal performance of the filter coalescence separation oil remover 1.

[0087] By setting up an online droplet particle monitor, flow meter 22, and performance calculation and analysis unit 24, in addition to directly monitoring the droplet particle concentration at the outlet 171, parameters such as the real-time separation efficiency, time-period separation efficiency, cumulative oil removal volume, and discharge timing of the filter coalescing separator 1 can be further calculated. By monitoring the droplet particle concentration and separation efficiency at the outlet 171, it is convenient to determine whether the performance of the coalescing filter element 163 is qualified, and by monitoring the discharge timing, it is determined whether discharge is necessary. This achieves comprehensive and accurate monitoring of the separation performance of the filter coalescing separator 1.

[0088] (3) It has a wide range of applications and high measurement accuracy.

[0089] By using the medium state equivalent converter 21, the sampling and monitoring requirements of the coalescing filter coalescing separator oil remover 1 with different diameter inlet pipe 14 or outlet pipe 17 can be met by using a small-sized flow meter 22 and an online droplet particle concentration monitor 23. This breaks the limitation of the diameter of the inlet and outlet 171 on the selection of the above instruments and has a wide range of applications. The equivalent converter 21111 ensures that the fluid parameters and states such as flow rate, pressure drop and droplet state during sampling are consistent with the original coalescing inlet and outlet, thus ensuring measurement accuracy.

[0090] (4) You can also input the predicted value of the monitoring data to calculate the predicted performance parameters such as the separation efficiency, time period separation efficiency, and cumulative oil removal amount of the filter coalescence separation oil remover 1.

[0091] Option 2

[0092] This disclosure provides a method for monitoring the separation performance of a filtration coalescence separation and oil removal system, used in the aforementioned filtration coalescence separation and oil removal system. The method for monitoring the separation performance includes:

[0093] Step S10: Monitor the droplet concentration and flow rate of the air inlet connector 14 and the air outlet connector 17 online, and collect and record data at a set sampling frequency;

[0094] Step S20: Calculate and record the real-time separation efficiency, cumulative oil removal volume, time-period separation efficiency, and discharge ratio based on the recorded droplet concentration and flow rate data.

[0095] This separation performance monitoring method enables the monitoring of the operating status of the filter coalescing separation oil remover 1. It can issue an alarm when the concentration of droplet particles at the outlet is higher than the alarm value and when the real-time separation efficiency is lower than the alarm value, thus ensuring the safe and reliable operation of the filter coalescing separation oil removal system.

[0096] The online separation performance monitoring system 2 is installed on the inlet pipe 14 and outlet pipe 17 of the filter coalescence separator 1. In one embodiment, the separation performance monitoring method includes: setting the sampling frequency through control software, activating the droplet particle concentration monitoring and flow meter 22, monitoring and recording the droplet particle concentration and flow rate of the inlet pipe 14 and outlet pipe 17 online, and obtaining curves showing the changes in droplet particle concentration and flow rate of the inlet and outlet 171 over time; setting an alarm value for the droplet particle concentration of the outlet 171, and issuing an alarm for monitoring values ​​higher than the alarm value for the droplet particle concentration of the outlet 171.

[0097] The separation performance monitoring method includes:

[0098] (a) Using the droplet particle concentrations collected at the air inlet and outlet 171, the real-time separation efficiency of the filter coalescence separator 1 is calculated. The calculation method is as follows:

[0099] In the formula: C1 is the concentration of droplets collected at the inlet, C2 is the concentration of droplets collected at the outlet, and R is the correlation coefficient, which represents the difference in the inlet sampling system and is generally taken as 1.

[0100] The real-time separation efficiency is monitored and recorded to obtain a curve showing the change of real-time separation efficiency over time. At the same time, an alarm value for the real-time separation efficiency of the filter coalescence separator 1 is set, and an alarm is triggered when the monitored value is lower than the set real-time separation efficiency.

[0101] (II) Using the droplet particle concentration and flow rate collected at the air inlet and outlet 171, calculate the cumulative oil removal capacity of the filter coalescence separator 1. The calculation method is as follows: L z =∑L i (2)

[0102] In the formula: This represents the average droplet concentration from two consecutive samples collected at the air inlet. Q1 is the average droplet concentration collected from two consecutive samples at outlet 171; Q2 is the gas flow rate through the sampling and measurement pipe 2112 connected to the inlet within a single time period at the set sampling frequency; k is the ratio of the cross-sectional area of ​​the medium flow in the main inlet medium pipe 2111 to the cross-sectional area of ​​the medium flow in the inlet sampling and measurement pipe 2112. i To set the liquid removal rate within a single sampling period, L z The cumulative oil removal amount of the filter coalescence separator oil remover 1.

[0103] Monitor and record the cumulative liquid removal volume of the filter coalescing separator oil remover 1, and obtain the curve of the cumulative liquid removal volume changing over time.

[0104] (III) Calculate the time-period separation efficiency of the filter-coalescence separator 1 using the cumulative liquid removal volume and the liquid volume added to the filter-coalescence separator 1 during the same period. The calculation method is as follows:

[0105] In the formula: L Z L represents the cumulative oil removal capacity of the oil separator 1 (filter coalescing separator). j The cumulative oil removal amount is the amount of liquid entering the filter coalescence separator 1 during the same period, calculated using formula (6), η. sd The time-period separation efficiency of the oil separator 1 for filtering coalescence separation. Lj =∑L k (6)

[0106] In the formula, L k The amount of liquid entering the filter coalescence separator oil remover 1 within a single time period is calculated using the following formula (7) to set the sampling frequency.

[0107] In the formula: Q1 is the average droplet concentration collected from two adjacent samples at the air inlet, Q1 is the gas flow rate through the sampling and measurement pipe 2112 connected to the air inlet within a single time period at the set sampling frequency, and k is the ratio of the cross-sectional area of ​​the medium flow in the main inlet medium pipe 2111 to the cross-sectional area of ​​the medium flow in the inlet sampling and measurement pipe 2112.

[0108] (iv) By utilizing the cumulative liquid removal volume and the specified discharge volume of the filter coalescing separator 1, the timing of liquid discharge from the filter coalescing separator 1 can be determined. The method is as follows:

[0109] In the formula: L Z L represents the cumulative oil removal capacity of the oil separator 1 (filter coalescing separator). g N represents the specified discharge volume of the filter coalescence separation oil separator 1, where N is the discharge multiple.

[0110] When N is an integer or close to an integer, it is the time to drain the fluid. The time to drain the fluid is determined by monitoring and judging the value of N.

[0111] Furthermore, the performance measurement and analysis unit 24 can query various monitoring and alarm data as needed, and can generate daily, weekly, monthly and yearly reports.

[0112] This separation performance monitoring method can be implemented using monitoring software. In one embodiment, as shown in Figure 16, the specific process of this separation performance monitoring method includes:

[0113] S1. Set the sampling frequency to once every 3 hours using the control software;

[0114] S2. Activate droplet concentration monitoring and flow meter 22 monitoring to monitor and record the droplet concentration and flow rate at the inlet and outlet 171 of the filter coalescence separator 1 online. Using the X-axis as the time axis and the Y-axis as the corresponding inlet and outlet 171 flow rate and droplet concentration, obtain curves showing the changes in droplet concentration and flow rate at the inlet and outlet 171 over time. Simultaneously, based on the set droplet concentration C at outlet 171... s The alarm value is used to determine the concentration of droplet particles C2 detected at outlet 171. For concentrations exceeding the set value C2 at outlet 171, [further action is taken]. s An alarm will be triggered based on the monitored value C2.

[0115] S3. The concentration of droplets 171 collected at the air inlet and outlet is used to calculate the real-time separation efficiency of the filter coalescing separator 1 using the above formula (1). The real-time separation efficiency is monitored and recorded. The curve of the real-time separation efficiency changing with time is obtained by taking the X-axis as the time axis and the Y-axis as the real-time separation efficiency of the filter coalescing separator 1. At the same time, the real-time separation efficiency η of the filter coalescing separator 1 is set. g The alarm value is used to determine the calculated real-time efficiency η. ss, For real-time separation η below the set value g The monitored value η ss Report to the police;

[0116] S4. The concentration and flow rate of droplets at the inlet and outlet 171 of the filter coalescing separator 1 are collected. The cumulative oil removal amount of the filter coalescing separator 1 is calculated simultaneously using the above formulas (2) and (3). The curve of the cumulative oil removal amount changing with time is obtained with the X-axis as the time axis and the Y-axis as the cumulative oil removal amount.

[0117] S5. Input the start and end times of the required calculation period separation efficiency. The software retrieves the cumulative liquid removal volume Lz obtained in step S4 based on the start and end times and calculates the liquid volume entering the filter coalescing separation oil separator 1 using the above formula (6). The software calculates the time period separation efficiency of the filter coalescing separation oil separator 1 using the above formula (4). The software records the time period separation efficiency calculated each time.

[0118] S6. According to the specified discharge volume L of the filter coalescence separator oil remover 1. g The cumulative liquid removal volume L obtained in step S4 z The discharge ratio N is calculated using the above formula (7), and it is determined whether N is an integer or close to an integer (within 5%). The discharge timing of the filter coalescence separation oil remover 1 is obtained, and the discharge signal is output to the discharge system.

[0119] To comprehensively evaluate the performance of the filter coalescing separator oil remover 1, the monitoring software can store and process the monitoring data, and has functions such as displaying historical data, analyzing and processing average, maximum, and minimum values, analyzing historical data trends, and generating annual, monthly, weekly, and daily reports.

[0120] In one embodiment, monitoring data prediction values ​​can also be input to calculate predicted performance parameters such as separation efficiency, time-period separation efficiency, and cumulative oil removal amount of the filter coalescence separator 1.

[0121] The above descriptions are merely a few embodiments of this disclosure. Those skilled in the art can make various modifications or variations to the embodiments of this disclosure based on the content disclosed in the application documents without departing from the spirit and scope of this disclosure.

Claims

1. A filtration, coalescence, separation, and oil removal system, characterized in that, include: Oil separator with filter coalescence separation, inlet pipe and outlet pipe; The filter coalescing separation oil remover includes a cylinder, a tube sheet, and a coalescing filter element mechanism. The tube sheet divides the inner cavity of the cylinder into an upper chamber and a lower chamber. The tube sheet is provided with tube sheet through holes. The coalescing filter element mechanism is disposed in the tube sheet through holes and is at least partially located in the upper chamber. The side wall of the cylinder is provided with an air outlet that communicates with the upper chamber, and the air outlet pipe is connected to the air outlet; The side wall of the cylinder is provided with an air inlet communicating with the lower chamber, and the air inlet pipe is connected to the air inlet; The coalescing filter element mechanism includes a filter element support, a coalescing filter element, and a locking nut. The filter element support includes a tube body and a support body. The support body is disposed at the upper end of the tube body. The tube body is connected to the tube plate through hole and communicates with the lower chamber. The coalescing filter element includes a coalescing filter section and a guide transition section. The guide transition section is detachably disposed at the upper end of the coalescing filter section. Both the coalescing filter section and the guide transition section are sleeved on the support body. The inner cavity of the coalescing filter section is connected to the tube body. Furthermore, the locking nut is connected to the upper end of the support body to lock the support body and the guide transition section. The coalescing filter section is located below the air outlet, and the guide transition section and the support both extend upward to above or near the air outlet.

2. The filtration, coalescence, separation, and oil removal system according to claim 1, characterized in that, The support includes a wing segment and a column guide section, the column guide section being disposed at the upper end of the wing segment, and the wing segment having multiple circumferentially distributed fins; The coalescing filter section is fitted outside the wing segment, and the guide transition section is fitted outside the column guide section.

3. The filtration, coalescence, separation, and oil removal system according to claim 2, characterized in that, The cross-sectional area of ​​the inner cavity of the coalescing filter section is larger than the cross-sectional area of ​​the inner cavity of the guide transition section. Furthermore, the cross-section of the outer contour of the wing segment is larger than the cross-section of the inner cavity of the guide transition section.

4. The filtration, coalescence, separation, and oil removal system according to claim 2, characterized in that, A sealing ring is fixedly connected to the upper end of the tube, and the fin segment is fixedly connected to the sealing ring. The lower end of the coalescing filter section is sealed to the sealing ring.

5. The filtration, coalescence, separation, and oil removal system according to claim 2, characterized in that, The column guide section extends upward to the outside of the guide transition section, the locking nut is screwed onto the column guide section and abuts against the upper end of the guide transition section, and a sealing gasket is provided between the locking nut and the guide transition section.

6. The filtration, coalescence, separation, and oil removal system according to claim 1, characterized in that, The tube sheet is provided with a plurality of tube sheet through holes, and the number of coalescing filter elements is equal to the number of tube sheet through holes. The coalescing filter elements are arranged one-to-one in the tube sheet through holes.

7. The filtration, coalescence, separation, and oil removal system according to claim 1, characterized in that, The air inlet pipe is connected to an online separation performance monitoring system, and / or the air outlet pipe is connected to an online separation performance monitoring system; The online separation performance monitoring system includes a medium state equivalent converter, a flow meter, and an online droplet concentration monitor. The medium state equivalent converter is connected to the inlet pipe or the outlet pipe, and the flow meter and the online droplet concentration monitor are both installed on the medium state equivalent converter.

8. The filtration, coalescence, separation, and oil removal system according to claim 7, characterized in that, The medium state equivalent converter includes a main medium pipeline and a sampling and measurement pipeline, and the equivalent converter is installed inside the main medium pipeline; Both ends of the sampling and measurement pipe are connected to the main medium pipe, and the connection points between the two ends of the sampling and measurement pipe and the main medium pipe are located upstream and downstream of the equivalent converter, respectively. Both the flow meter and the online droplet concentration monitor are installed in the sampling and measurement pipeline.

9. The filtration, coalescence, separation, and oil removal system according to claim 8, characterized in that, The equivalent converter includes a flow-blocking element, which is provided with one or more medium flow passages. The sum of the medium flow cross-sectional area of ​​the medium flow passage and the medium flow cross-sectional area of ​​the sampling and measurement pipeline is equal to the cross-sectional area of ​​the air inlet or the cross-sectional area of ​​the air outlet.

10. A method for monitoring the separation performance of a filtration coalescence separation and oil removal system, characterized in that, The separation performance monitoring method for the filtration coalescence separation and oil removal system according to any one of claims 1-9 includes: Step S10: Monitor the droplet concentration and flow rate of the inlet and outlet pipes online, and collect and record data at a set sampling frequency; Step S20: Calculate and record the real-time separation efficiency, cumulative oil removal volume, time-period separation efficiency, and discharge ratio based on the recorded droplet concentration and flow rate data.

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