Online automatic deslagging pipeline filter

Abstract

The invention discloses an on-line automatic deslagging pipeline filter which comprises a shell, a filter screen and a deslagging mechanism, the shell is provided with an input pipeline and an output pipeline, a filter cavity is formed in the shell, and the filter cavity is communicated with the input pipeline and the output pipeline; the filter screen is arranged in the filter cavity and can shield the input pipeline and / or the output pipeline, so that the input pipeline and the output pipeline are separated through the filter screen; the deslagging mechanism comprises a filter screen brush and a driving assembly, and the driving assembly is used for driving the filter screen brush to scrape and brush the filter screen. Solid impurities in the filter can be effectively treated in time, and the problems that the front-back pressure difference of the filter is increased and the flow capacity is reduced due to accumulation of the solid impurities are solved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum and natural gas processing, and in particular to an online automatic slag removal pipeline filter. Background Art

[0002] The oil and gas development and processing industries use a large number of pipeline filters to remove solid impurities in pipeline fluids to prevent solid impurities and sludge from causing wear and blockage to downstream centrifugal pumps and other equipment, causing equipment failures and device shutdowns. During operation, as the impurities in the pipeline filter increase, the filter flow capacity decreases, and the pressure difference before and after the filter increases. When the pressure difference increases to a certain level, it is necessary to stop or switch the filter, open the filter equipment and remove the filter residue to improve the filter flow capacity.

[0003] In the actual oil and gas production and processing process, due to medium changes, fluctuations, equipment start-up and shutdown, etc., there are many fluid impurities and frequent filter blockages, so the filter needs to be frequently shut down and opened for cleaning. However, the medium usually has characteristics such as high temperature, high pressure, toxicity, and harmfulness. Cleaning the filter requires pipeline filter medium isolation, recovery, replacement, equipment opening, cleaning, reinstallation, pressure testing and other steps. The workload is large and the risk is high. It will cause periodic shutdowns and seriously affect production efficiency. At the same time, in order to deal with the situation of filter damage, the filter occasionally needs to be disassembled and replaced, and there is a probability of medium leakage and periodic shutdowns in the process. Summary of the invention

[0004] The object of the present invention is to provide an online automatic slag removal pipeline filter, which can timely and effectively process solid impurities in the filter and solve the problem that the pressure difference before and after the filter increases and the flow capacity decreases due to the accumulation of solid impurities.

[0005] The present invention is achieved through the following technical solutions:

[0006] An online automatic slag removal pipeline filter comprises: a shell, the shell is provided with an input pipeline and an output pipeline, a filter chamber is provided in the shell, and the filter chamber is communicated with the input pipeline and the output pipeline respectively; a filter screen, the filter screen is arranged in the filter chamber, the filter screen can block the input pipeline and / or the output pipeline so that the input pipeline and the output pipeline are separated by the filter screen; a slag removal mechanism, the slag removal mechanism comprises a filter brush and a drive assembly, and the drive assembly is used to drive the filter brush to scrape the filter screen.

[0007] Optionally, the drive assembly includes a motor and a screw, the motor is transmission-connected to the screw, one end of the screw penetrates into the shell and is threadedly connected to the shell, the insertion end of the screw is connected to the filter brush, the filter brush is attached to the surface of the filter, and reciprocates along the axial direction of the screw under the action of the motor.

[0008] Optionally, the filter is cylindrical, the side wall of the filter blocks the inner end of the output pipe, and the screw is coaxially arranged with the filter; the filter brush includes a support plate and a bristle layer mounted on the circumference of the support plate, the support plate is tightly matched with the inner wall of the filter, and the bristle layer is interference fit with the inner wall of the filter.

[0009] Optionally, the filter screen is cylindrical, quasi-cylindrical or prismatic.

[0010] Optionally, the filter screen is vertically arranged, and a funnel-shaped receiving piece is provided at the bottom end of the filter screen. The bottom end of the receiving piece is connected to a sewage pipe, and the sewage pipe is provided with a shut-off valve, and the shut-off valve is used to close or open the sewage pipe.

[0011] Optionally, the sewage pipe is provided with a sewage valve, and the sewage valve is arranged relative to the cut-off valve and away from the receiving member, and a sewage collecting space is formed between the sewage valve and the cut-off valve.

[0012] Optionally, the filter cavity is cylindrical and matches the filter screen. The filter screen is coaxially mounted in the filter cavity. A liquid gap is reserved between the side wall of the filter screen and the cavity wall of the filter cavity. The width of the liquid gap is smaller than the size of the filter holes of the filter screen.

[0013] Optionally, the support plate is provided with a plurality of filter holes along the thickness direction, and the size of the filter holes matches the size of the filter holes of the filter net.

[0014] Optionally, the support plate includes a pair of support clamp rings and a filter press, the filter press is clamped between two of the support clamp rings, and the mesh of the filter press is the filter hole.

[0015] Optionally, the input pipeline and the output pipeline are respectively provided with a front-end pressure sensor and a rear-end pressure sensor, and the front-end pressure sensor and the rear-end pressure sensor are respectively connected to the driving component.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] The present invention provides an online automatic slag removal pipeline filter, which is provided with a shell, and a filter screen is provided in the shell to filter solid impurities in the fluid in the shell; on this basis, an input pipeline and an output pipeline are provided, and the positional relationship between the two and the filter screen is restricted, and the two are separated by the filter screen, so that the fluid entering the input pipeline and discharged from the output pipeline must pass through the filter screen for filtration; on this basis, a slag removal mechanism is provided, which includes a filter screen brush and a driving component, and the driving component is used to drive the filter screen brush to scrape the filter screen, so that the mud and solid impurities attached to the surface of the filter screen are effectively separated from the filter screen, so as to ensure the flux and filtering performance of the filter screen at all times, thereby ensuring that the performance of the pipeline filter is always stable, thereby solving the problem of increased front-to-back pressure difference and reduced flow capacity of the filter due to accumulation of solid impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0019] Figure 1 A half-section schematic diagram of an online automatic slag removal pipeline filter provided by an embodiment of the present invention;

[0020] Figure 2 A schematic top view of a filter brush for an online automatic slag removal pipeline filter provided by an embodiment of the present invention;

[0021] Figure 3 A schematic side view of a filter brush for an online automatic slag removal pipeline filter provided by an embodiment of the present invention;

[0022] Figure 4 A partial schematic diagram of the filter screen, receiving member and sewage pipe of the online automatic slag removal pipeline filter provided in an embodiment of the present invention.

[0023] Marks and corresponding parts names in the attached drawings:

[0024] 10-housing; 11-input pipe; 12-output pipe; 13-filter chamber; 20-filter screen; 30-filter screen brush; 31-support plate; 311-filter screen; 3111-filter hole; 32-brush layer; 33-support clamp ring; 40-motor; 41-screw rod; 50-connector; 51-drain pipe; 52-shut-off valve; 53-drain valve; 60-front-end pressure sensor; 61-rear-end pressure sensor. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0026] Please refer to Figures 1 to 4 The embodiment of the present invention provides an online automatic slag removal pipeline filter, comprising: a shell 10, wherein the shell 10 is provided with an input pipeline 11 and an output pipeline 12, wherein a filter chamber 13 is provided in the shell 10, wherein the filter chamber 13 is communicated with the input pipeline 11 and the output pipeline 12 respectively; a second filter screen 20, wherein the filter screen 20 is arranged in the filter chamber 13, wherein the filter screen 20 can block the input pipeline 11 and / or the output pipeline 12 so that the input pipeline 11 and the output pipeline 12 are separated by the filter screen 20; a third slag removal mechanism, wherein the slag removal mechanism comprises a filter screen brush 30 and a driving component, wherein the driving component is used to drive the filter screen brush 30 to scrape the filter screen 20.

[0027] The present invention provides an online automatic slag removal pipeline filter, which is provided with a shell 10, and a filter screen 20 is provided in the shell 10 to filter solid impurities in the fluid in the shell 10; on this basis, an input pipeline 11 and an output pipeline 12 are provided, and the positional relationship between the two and the filter screen 20 is limited, and the two are separated by the filter screen 20, so that the fluid entering the input pipeline 11 and discharged from the output pipeline 12 must pass through the filter screen 20 for filtration; on this basis, a slag removal mechanism is provided, which includes a filter screen brush 30 and a driving component, and the driving component is used to drive the filter screen brush 30 to scrape the filter screen 20, so that the mud and solid impurities attached to the surface of the filter screen 20 are effectively separated from the filter screen 20, so as to ensure the flux and filtering performance of the filter screen 20 at all times, thereby ensuring that the performance of the pipeline filter is always stable, thereby solving the problem that the pressure difference between the front and rear of the filter increases and the flow capacity decreases due to the accumulation of solid impurities.

[0028] It should be noted that the positional relationship between the filter screen 20 and the input pipe 11 and the output pipe 12 can be explained in detail in the following ways: (1) the filter screen 20 only blocks the input pipe 11. At this time, the silt and fixed impurities are isolated on the side of the filter screen 20 from which the liquid comes. After the filter screen brush 30 scrapes the filter screen 20, the silt and solid impurities fall to the input end of the input pipe 11. Although this setting method can ensure the normal operation and normal flux of the filter screen 20 at all times through the filter screen brush 30, on the one hand, the silt and solid impurities will still repeatedly impact the filter screen 20 under the action of the liquid flow, resulting in a decrease in its flux. On the other hand, the silt and solid impurities accumulate in the input pipe 11. Cannot be cleared out; (2) The filter screen 20 only blocks the input pipe 11, and a certain gap is reserved between the filter screen 20 and the outlet of the input pipe 11. At this time, mud and solid impurities fall into the filter chamber 13, but due to the reserved gap, the filtering effect is inevitably reduced; (3) The filter screen 20 only blocks the output pipe 12. At this time, mud and solid impurities fall into the filter chamber 13; (4) The filter screen 20 blocks both the input pipe 11 and the output pipe 12, and a certain gap is reserved between the filter screen 20 and the outlet of the input pipe 11. For example, the filter screen 20 has two pieces, which respectively perform primary screening and secondary screening on the fluid. At this time, mud and solid impurities fall into the filter chamber 13.

[0029] It should be noted that, in order to facilitate the filter brush 30 to scrape the filter 20 , the filter 20 is preferably set to a flat surface or a regular curved surface, and the shape of the filter brush 30 can be adaptively designed to match the shape of the filter 20 .

[0030] In order to further explain the specific structure of the driving assembly, the driving assembly includes a motor 40 and a screw rod 41, the motor 40 is transmission-connected to the screw rod 41, one end of the screw rod 41 penetrates into the housing 10 and is threadedly connected to the housing 10, the penetration end of the screw rod 41 is connected to the filter brush 30, the filter brush 30 is attached to the surface of the filter 20, and reciprocates along the axial direction of the screw rod 41 under the action of the motor 40.

[0031] Through the above arrangement, the motor 40 drives the screw rod 41 to rotate, and the screw rod 41 moves along its own axial direction through the threaded connection with the shell 10, thereby driving the filter brush 30 to move along the axial direction of the screw rod 41, and scraping the surface of the filter 20 through linear motion.

[0032] In order to further optimize the structure of the filter 20, the filter 20 is cylindrical, the side wall of the filter 20 blocks the inner end of the output pipe 12, and the screw rod 41 is coaxially arranged with the filter 20; the filter brush 30 includes a support plate 31 and a bristle layer 32 mounted on the side of the support plate 31, the support plate 31 is tightly matched with the inner wall of the filter 20, and the bristle layer 32 is interference fit with the inner wall of the filter 20.

[0033] Through the above arrangement, firstly, the filter screen 20 can fully cover the filter cavity 13 to realize an all-round filtering function; secondly, the cylindrical design is adopted so that the filter brush 30 can synchronously scrape the entire filtering surface of the filter screen 20 to further optimize the cleaning efficiency; thirdly, the cylindrical filter screen 20 can gather and collect the solid impurities scraped off to prevent the solid impurities from being stuck in the corners of the filter cavity 13 and other positions.

[0034] Optionally, the filter screen 20 is cylindrical, quasi-cylindrical or prismatic, preferably cylindrical.

[0035] In order to process the solid impurities collected by the cylindrical filter screen 20, the filter screen 20 is arranged vertically, and a funnel-shaped receiving part 50 is provided at the bottom end of the filter screen 20. The bottom end of the receiving part 50 is connected to a sewage pipe 51, and the sewage pipe 51 is provided with a shut-off valve 52. The shut-off valve 52 is used to close or open the sewage pipe 51.

[0036] Through the above arrangement, the filtered and scraped solid impurities fall into the receiving part 50 along the vertically arranged cylindrical filter screen 20, and are enriched under the funnel-shaped effect and fall into the sewage pipe 51. When accumulated to a certain extent, the shut-off valve 52 can be opened to discharge all the accumulated solid impurities at one time.

[0037] In order to avoid fluid leakage during the process of discharging solid impurities, the drain pipe 51 is provided with a drain valve 53. The drain valve 53 is arranged away from the receiving member 50 relative to the cut-off valve 52, and a sewage collecting space is formed between the drain valve 53 and the cut-off valve 52.

[0038] With the above arrangement, when in use, first keep the shut-off valve 52 open and the drain valve 53 closed, so that solid impurities accumulate in the sewage collecting space. When accumulated to a certain extent, close the shut-off valve 52 to seal and isolate the fluid pipeline from the sewage collecting space, and then open the drain valve 53 to open the sewage collecting space from the lower end to discharge the solid impurities therein.

[0039] In order to prevent the slightly smaller solid impurities attached to the filter 20 from passing through the filter 20 and falling into the filter cavity 13 when the filter brush 30 scrapes the filter 20, the filter cavity 13 is cylindrical and matches the filter 20. The filter 20 is coaxially mounted in the filter cavity 13. A liquid gap is reserved between the side wall of the filter 20 and the cavity wall of the filter cavity 13. The width of the liquid gap is smaller than the size of the filter hole of the filter 20.

[0040] Through the above arrangement, the liquid gap can ensure smooth filtration of the filter 20 (that is, the fluid can flow from one side to the other side), and because the width of the liquid gap is smaller than the size of the filter holes of the filter 20, although solid impurities with smaller volumes can pass through the filter 20, they cannot fall along the filtration gap, and most of them must be located on the inner side of the filter 20. At this time, they can be scraped off smoothly by scraping with the filter brush 30.

[0041] In order to prevent the hydraulic pressure in the cylindrical filter 20 from increasing significantly when the filter brush 30 is pressed down, the support plate 31 is penetrated with a plurality of filter holes 3111 along the thickness direction, and the size of the filter holes 3111 matches the size of the filter holes of the filter 20.

[0042] Preferably, in order to ensure the filtering effect of the filter press, the support plate 31 includes a pair of support clamp rings 33 and a filter press mesh 311 , the filter press mesh 311 is clamped between the two support clamp rings 33 , and the mesh of the filter press mesh 311 is the filter hole 3111 .

[0043] In order to realize the automation of the filter brush 30, the input pipe 11 and the output pipe 12 are respectively provided with a front-end pressure sensor 60 and a rear-end pressure sensor 61, and the front-end pressure sensor 60 and the rear-end pressure sensor 61 are respectively connected to the driving assembly.

[0044] When the pressure difference between the rear pressure sensor 61 and the front pressure sensor 60 is greater than the preset upper limit, both send signals to the control system of the drive component to control it to open, so that the filter brush 30 starts to clean the filter 20. When the pressure difference returns to the preset lower limit, both send signals to the control system of the drive component to control it to close.

[0045] Specifically, the front-end pressure sensor 60 and the rear-end pressure sensor 61 send signals to the control system of the motor 40 to control the motor 40 to rotate forward or reverse or stop.

[0046] In order to further realize the automation of sewage discharge, the shut-off valve 52 and the sewage valve 53 are electrically connected to the motor 40. When the motor 40 is started, the shut-off valve 52 is opened and the sewage valve 53 is closed. When the motor 40 is stopped, the shut-off valve 52 is closed and the sewage valve 53 is opened.

[0047] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online automatic slag removal pipeline filter, characterized in that: include: A housing (10), wherein the housing (10) is provided with an input pipe (11) and an output pipe (12), wherein a filter chamber (13) is provided inside the housing (10), and the filter chamber (13) is respectively connected to the input pipe (11) and the output pipe (12); a filter screen (20), the filter screen (20) being arranged in the filter chamber (13), the filter screen (20) being capable of shielding the input pipe (11) and / or the output pipe (12), so that the input pipe (11) and the output pipe (12) are separated by the filter screen (20); A slag removal mechanism, the slag removal mechanism comprising a filter brush (30) and a drive assembly, the drive assembly being used to drive the filter brush (30) to scrape the filter (20).

2. The online automatic slag removal pipeline filter according to claim 1 is characterized in that: The driving assembly comprises a motor (40) and a screw rod (41), the motor (40) being transmission-connected to the screw rod (41), one end of the screw rod (41) passing through the housing (10) and being threadedly connected to the housing (10), the insertion end of the screw rod (41) being connected to the filter brush (30), the filter brush (30) being attached to the surface of the filter (20) and reciprocating along the axial direction of the screw rod (41) under the action of the motor (40).

3. The online automatic slag removal pipeline filter according to claim 2 is characterized in that: The filter screen (20) is cylindrical, the side wall of the filter screen (20) blocks the inner end of the output pipe (12), and the screw rod (41) is coaxially arranged with the filter screen (20); The filter brush (30) comprises a support plate (31) and a bristle layer (32) sleeved on the peripheral side of the support plate (31); the support plate (31) is tightly matched with the inner wall of the filter (20); and the bristle layer (32) is interference matched with the inner wall of the filter (20).

4. The online automatic slag removal pipeline filter according to claim 3 is characterized in that: The filter screen (20) is cylindrical, quasi-cylindrical or prismatic.

5. The online automatic slag removal pipeline filter according to claim 3 is characterized in that: The filter screen (20) is arranged vertically, and a funnel-shaped receiving part (50) is provided at the bottom end of the filter screen (20). The bottom end of the receiving part (50) is connected to a sewage pipe (51), and the sewage pipe (51) is provided with a shut-off valve (52). The shut-off valve (52) is used to close or open the sewage pipe (51).

6. The online automatic slag removal pipeline filter according to claim 5 is characterized in that: The sewage pipe (51) is provided with a sewage valve (53), and the sewage valve (53) is arranged away from the receiving member (50) relative to the cut-off valve (52), and a sewage collecting space is formed between the sewage valve (53) and the cut-off valve (52).

7. The online automatic slag removal pipeline filter according to claim 5 is characterized in that: The filter cavity (13) is in a cylindrical shape matching the filter screen (20); the filter screen (20) is coaxially mounted in the filter cavity (13); a liquid-passing gap is reserved between the side wall of the filter screen (20) and the cavity wall of the filter cavity (13); the width of the liquid-passing gap is smaller than the size of the filter holes of the filter screen (20).

8. The online automatic slag removal pipeline filter according to any one of claims 3 to 7, characterized in that: The support plate (31) is provided with a plurality of filter holes (3111) extending through it in the thickness direction, and the size of the filter holes (3111) matches the size of the filter holes of the filter screen (20).

9. The online automatic slag removal pipeline filter according to claim 8, characterized in that: The support plate (31) comprises a pair of support clamp rings (33) and a filter press (311); the filter press (311) is clamped between the two support clamp rings (33); and the mesh of the filter press (311) is the filter hole (3111).

10. The online automatic slag removal pipeline filter according to claim 8, characterized in that: The input pipeline (11) and the output pipeline (12) are respectively provided with a front-end pressure sensor (60) and a rear-end pressure sensor (61), and the front-end pressure sensor (60) and the rear-end pressure sensor (61) are respectively connected to the driving component.

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