A small combined filter and separator

Abstract

The application discloses a small combined filtering and separating device, and belongs to the technical field of natural gas filtering. The inside of the shell of the device is divided into a filtering chamber, a buffer chamber and a separating chamber from top to bottom by partitions. The space volume of the filtering chamber, the buffer chamber and the separating chamber gradually increases. An air inlet pipe is arranged on one side wall of the buffer chamber, and an air outlet pipe is arranged on one side wall of the filtering chamber. Natural gas enters the buffer chamber from the air inlet pipe, and large-particle impurities and liquid are removed in the buffer chamber. The natural gas then enters an axial flow cyclone in the separating chamber, and remaining large-particle impurities and liquid are separated. The natural gas then enters the filtering chamber above through an air exhaust pipe, is filtered by a filter, is further purified, and is finally discharged from the shell. The device is compact in structure, small in floor space, and capable of performing three-stage separation. The performance of the device is far superior to that of a traditional scheme. The device solves the problem that a single device occupies a large space, reduces the use and maintenance cost of a customer, and guarantees the normal work of back-end pressure regulating equipment and metering equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of natural gas filtration, in particular to a small combined filter separation device. BACKGROUND

[0002] At present, many medium-pressure pipelines are prone to be blocked in the filter of the low-pressure regulating device at the rear end due to poor gas quality, which causes the operation unit to frequently clean, increases the maintenance investment, and also affects the normal gas supply. The common solution is to increase the filter area or add a primary filter, but both will increase the overall size of the equipment. Some customers have very compact installation locations and cannot provide larger installation locations. In addition, if the gas contains a lot of water, even if the filter area is increased, it is also easy to cause blockage. SUMMARY

[0003] Therefore, the present application provides a small combined filter separation device, which is characterized in that the inside of the shell is divided into a filter chamber, a buffer chamber and a separation chamber from top to bottom by a partition plate, and the space volume of the filter chamber, the buffer chamber and the separation chamber gradually increases. An air inlet pipe is arranged on one side wall of the buffer chamber, and an air outlet pipe is arranged on one side wall of the filter chamber. Natural gas enters the buffer chamber from the air inlet pipe, and large-particle impurities and liquid are removed in the buffer chamber. Then, the natural gas enters the axial-flow cyclone in the separation chamber, and the remaining large-particle impurities and liquid are separated out. Then, the natural gas enters the filter chamber above through the exhaust pipe, is filtered by the filter, is further purified, and is finally discharged from the shell. The device has a compact structure, a small footprint, and can perform three-stage separation. The performance is much better than that of the traditional scheme, the problem of large space occupied by a single device is solved, the use and maintenance cost of the customer is reduced, and the normal work of the low-pressure regulating device and the metering device at the rear end is ensured.

[0004] The technical scheme adopted by the present application is as follows:

[0005] A small combined filter separation device comprises:

[0006] A shell is provided with a flange cover at the top end and a blowdown opening at the bottom end. The inside of the shell is divided into a filter chamber, a buffer chamber and a separation chamber from top to bottom by a partition plate, and the space volume of the filter chamber, the buffer chamber and the separation chamber gradually increases. An air inlet pipe is arranged on one side wall of the buffer chamber, and an air outlet pipe is arranged on one side wall of the filter chamber.

[0007] An axial-flow cyclone is arranged in the separation chamber, and the top end of the axial-flow cyclone is in communication with the buffer chamber, and the bottom end of the axial-flow cyclone is in communication with the separation chamber. A exhaust pipe is arranged at the center of the axial-flow cyclone, the upper end of the exhaust pipe extends upward through the buffer chamber and is in communication with the filter chamber, and guide vanes are arranged on the outer side wall of the exhaust pipe at the top of the axial-flow cyclone.

[0008] A filter is arranged in the filter chamber below the flange cover; the filter is a cylindrical structure with a central exhaust pipe, air is taken in by the side wall and exhausted by the central exhaust pipe after filtration; one end of the exhaust pipe is connected to the exhaust pipe, and the other end extends out of the filter chamber.

[0009] In the small combined filter and separator device disclosed in the present application, a plurality of annular baffles are arranged in the buffer chamber, and the annular baffles are arranged downwardly inclined;

[0010] The annular baffles are located below the air inlet pipe and are arranged in an alternating manner on the inner side wall of the buffer chamber and the outer side wall of the exhaust pipe.

[0011] In the small combined filter and separator device disclosed in the present application, a first annular U-shaped groove is arranged at the top of the separation chamber, the top end of the first annular U-shaped groove is communicated with the buffer chamber through a first through hole, and the bottom is communicated with the separation chamber through a first blowdown pipe, and a first electromagnetic valve is arranged on the first blowdown pipe.

[0012] In the small combined filter and separator device disclosed in the present application, the downwardly inclined end of the bottommost annular baffle in the buffer chamber is located directly above the first through hole.

[0013] In the small combined filter and separator device disclosed in the present application, a second annular U-shaped groove is arranged at the top of the buffer chamber, the top end of the second annular U-shaped groove is communicated with the filter chamber through a second through hole, and the bottom is communicated with the buffer chamber through a second blowdown pipe, and a second electromagnetic valve is arranged on the second blowdown pipe.

[0014] In the small combined filter and separator device disclosed in the present application, the second annular U-shaped groove is arranged along the outer side wall of the exhaust pipe, the topmost annular baffle in the buffer chamber is arranged on the exhaust pipe, and the bottom end of the second blowdown pipe is located above the topmost annular baffle.

[0015] In the small combined filter and separator device disclosed in the present application, the number of first blowdown pipes and second blowdown pipes is multiple, and they are uniformly distributed below the first annular U-shaped groove and the second annular U-shaped groove.

[0016] In the small combined filter and separator device disclosed in the present application, the axial flow cyclone has:

[0017] A cylindrical barrel is arranged in the separation chamber, the top end of which is communicated with the buffer chamber; the guide vanes are located in the cylindrical barrel, and the air inlet of the exhaust pipe is located below the guide vanes;

[0018] An inverted conical barrel is communicated with the bottom end of the cylindrical barrel;

[0019] The ash bucket is communicated with the bottom end of the inverted conical cylinder, and a vortex cover is arranged at the connection between the ash bucket and the inverted conical cylinder.

[0020] In the small combined filter and separator device disclosed in the application, a hand hole is arranged on a side wall of the separation chamber.

[0021] In the small combined filter and separator device disclosed in the application, the filter is vertically arranged at the top center of the filter chamber, the upper end of the exhaust pipe is sealed, and the lower end of the exhaust pipe is arranged to exhaust air, one end of the air outlet pipe is connected to the lower end of the exhaust pipe, and the other end of the air outlet pipe is bent downward and extends out of the filter chamber.

[0022] Compared with the prior art, the application has the following beneficial effects:

[0023] (1) The device has a compact internal structure and a reasonable layout, the outer side wall is only provided with an air inlet pipe, an exhaust pipe and a hand hole, the top is a flange cover, and the bottom is a blowdown port, so that the device occupies a small area and can be installed in a small place, and the device can perform three-stage separation, the performance is far superior to the traditional scheme, the problem of large space occupied by a single device is solved, the use and maintenance cost of the customer is reduced, and the normal work of the back-end pressure regulating equipment and the metering equipment is ensured.

[0024] (2) According to the characteristics of three-stage separation, the shell is reasonably arranged, the shell is divided into a filter chamber, a buffer chamber and a separation chamber from top to bottom by a partition plate, the filter chamber is the third stage of filtration, the impurities filtered are few, and the filter occupies a small area, so the space volume of the filter chamber is small; the separation chamber is the second stage of filtration, the impurities filtered are more, and the axial flow type cyclone occupies a large area, so the space volume of the separation chamber is large; although the buffer chamber is the first stage of filtration, the impurities filtered are the most, but the annular baffle occupies a small area, so the space volume of the buffer chamber is smaller than that of the separation chamber and larger than that of the filter chamber, the first annular U-shaped groove for storing and buffering the impurities in the buffer chamber is arranged in the separation chamber, and the second annular U-shaped groove for storing and buffering the impurities in the filter chamber is arranged in the buffer chamber.

[0025] (3) The blowdown pipe is arranged at the bottom of the first annular U-shaped groove and the second annular U-shaped groove, the blowdown pipe communicates the filter chamber, the buffer chamber and the separation chamber, the flange cover is opened, the cleaning liquid can enter the shell from the top, and then flow through the filter chamber, the buffer chamber and the separation chamber for cleaning, and finally be discharged from the blowdown port at the bottom, so that the problem that the existing filter and separator device is difficult to clean is solved, and the service life of the filter and separator device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0027] Figure 1 Fig. 2 is a schematic view of the internal structure of a small combined filter and separator device;

[0028] Figure 2 Fig. 3 is a schematic view of the external structure of a small combined filter and separator device;

[0029] Figure 3 Fig. 4 is an enlarged view of A in Fig. 1; Figure 1

[0030] Figure 4 Fig. 6 is a schematic view of the structure of a first annular U-shaped groove;

[0031] Figure 5 Fig. 7 is a schematic view of the structure of a second annular U-shaped groove;

[0032] Figure 6 Fig. 8 is a schematic view of the structure of an annular baffle.

[0033] Reference signs:

[0034] 10, housing; 11, flange cover; 12, blowdown port; 13, air inlet pipe; 14, air outlet pipe; 15, hand hole; 16, partition plate;

[0035] 20, buffer chamber; 21, annular baffle; 22, first annular U-shaped groove; 23, first through hole; 24, first blowdown pipe; 25, first electromagnetic valve;

[0036] 30, separation chamber; 31, axial flow cyclone; 32, air outlet pipe; 33, guide vane; 34, cylindrical barrel; 35, inverted conical barrel; 36, hopper; 37, vortex cover;

[0037] 40, filter chamber; 41, filter; 42, air outlet pipe; 43, second annular U-shaped groove; 44, second through hole; 45, second blowdown pipe; 46, second electromagnetic valve. DETAILED DESCRIPTION

[0038] ​For the above purposes, features and advantages of the present application, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0039] The terms "comprise" and "have" and any variations thereof, as used in the present application, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device that includes a list of steps or units is not limited to the listed steps or units, but can optionally further include steps or units not listed, or can optionally further include other steps or units inherent to such processes, methods, products or devices.

[0040] In addition, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0042] In the present application, the reference to "embodiments" means that the specific features, structures or properties described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it independent or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0043] Please refer to Figures 1-6 As shown in the drawings, the present application discloses a small combined filter separation device, comprising:

[0044] The shell 10 is provided with a flange cover 11 at the top end and a blowdown port 12 at the bottom end. The inside of the shell 10 is divided into a filter chamber 40, a buffer chamber 20 and a separation chamber 30 from top to bottom by a partition 16. The buffer chamber 20 is provided with an air inlet pipe 13 on one side wall, and the filter chamber 40 is provided with an air outlet pipe 14 on one side wall. Natural gas enters the shell 10 from the air inlet pipe 13, is filtered and separated, and is discharged from the air outlet pipe 14. The separated impurities are discharged from the blowdown port 12. In order to make the device occupy a small area and make full use of the space in the shell 10, the space is allocated according to the installation of equipment and functions in the filter chamber 40, the buffer chamber 20 and the separation chamber 30. The space volume of the filter chamber 40 is smaller than that of the buffer chamber 20, and the space volume of the buffer chamber 20 is smaller than that of the separation chamber 30, that is, the space volumes of the filter chamber 40, the buffer chamber 20 and the separation chamber 30 gradually increase. The flange cover 11 is provided at the top of the shell 10 and can be used as a vent to vent when the equipment is checked and maintained, and is also convenient for cleaning and maintaining the inside of the shell 10.

[0045] The axial flow cyclone 31 is arranged in the separation chamber 30 and communicates with the buffer chamber 20 at the top end and with the separation chamber 30 at the bottom end. The axial flow cyclone 31 is provided with an exhaust pipe 32 at the center, and the upper end of the exhaust pipe 32 extends upward through the buffer chamber 20 and communicates with the filter chamber 40. The outer side wall of the exhaust pipe 32 at the top of the axial flow cyclone 31 is provided with guide vanes 33. Natural gas enters the buffer chamber 20 from the air inlet pipe 13, and large-particle impurities and liquid are removed in the buffer chamber 20. Then the natural gas enters the axial flow cyclone 31 in the separation chamber 30. Through the guide vanes 33, the remaining particle and liquid impurities adhere to the wall under the action of the axial rotating gas flow centrifugal force, so that the gas and particles are layered, and the particles and liquid impurities fall into the lower part, and the separated gas enters the upper filter chamber 40 through the exhaust pipe 32.

[0046] The filter 41 is arranged in the filter chamber 40 below the flange cover 11. The filter 41 is a cylindrical structure with a center configured as an exhaust pipe 42. The filter 41 takes in gas from the side wall and discharges filtered gas from the center exhaust pipe 42. One end of the air outlet pipe 14 is connected to the exhaust pipe 42, and the other end extends out of the filter chamber 40. The gas entering the filter chamber 40 is taken in from the side wall of the filter 41, filtered by the filter 41, discharged from the center exhaust pipe 42, and then discharged from the shell 10 through the air outlet pipe 14 to obtain purified natural gas. The filter 41 is arranged in the top filter chamber 40 below the flange cover 11, which is convenient for replacement and cleaning.

[0047] The shell 10 of the device is sequentially provided with a filtering chamber 40, a buffer chamber 20 and a separation chamber 30 from top to bottom. The buffer chamber 20 is provided with an air inlet pipe 13 on one side wall. The filtering chamber 40 is provided with an air outlet pipe 14 on one side wall. Natural gas enters the buffer chamber 20 from the air inlet pipe 13. The large-particle impurities and liquid are removed in the buffer chamber 20. The natural gas enters the axial flow cyclone 31 of the separation chamber 30. The remaining particle impurities and liquid are separated. Then the natural gas enters the filtering chamber 40 above through the air exhaust pipe 32. The natural gas is filtered through the filter 41 to further purify the natural gas. Finally, the natural gas is discharged from the shell 10. The device has compact structure and small floor area. The device can perform three-stage separation. The performance is far superior to the traditional scheme. The problem that a single device occupies a large space is solved. The use and maintenance cost of the customer is reduced. The normal work of the back-end pressure regulating equipment and the metering equipment is ensured.

[0048] In one embodiment, as shown in Figure 1 , 6 The buffer chamber 20 is provided with a plurality of annular baffles 21. The annular baffles 21 are downwardly inclined. The annular baffles 21 are located below the air inlet pipe 13 and are spaced and staggered on the inner side wall of the buffer chamber 20 and the outer side wall of the air exhaust pipe 32. The natural gas enters the buffer chamber 20 from the air inlet pipe 13 and sequentially collides with the plurality of annular baffles 21. Part of the particle and liquid with large particle size in the natural gas are captured and separated by relying on their own inertia. The particle and liquid continuously gather and flow into the lower part along the downwardly inclined annular baffles 21.

[0049] In one embodiment, as shown in Figure 1 , 4 The top of the separation chamber 30 is provided with a first annular U-shaped groove 22. The top end of the first annular U-shaped groove 22 is communicated with the buffer chamber 20 through a first through hole 23. The bottom is communicated with the separation chamber 30 through a first blowdown pipe 24. The first blowdown pipe 24 is provided with a first electromagnetic valve 25. The particle and liquid fall along the annular baffles 21, enter the first annular U-shaped groove 22 through the first through hole 23 and are stored. When the impurities need to be discharged or cleaned, the first electromagnetic valve 25 is opened. The impurities in the first annular U-shaped groove 22 flow into the separation chamber 30 below. Finally, the impurities are discharged through the blowdown port 12 at the bottom of the shell 10.

[0050] Specifically, the downwardly inclined end of the annular baffle 21 at the bottom of the buffer chamber 20 is located directly above the first through hole 23. The particle and liquid impurities fall into the first annular U-shaped groove 22. The edge of the first through hole 23 is smoothly transitioned. The liquid carrying the particle impurities flows into the first annular U-shaped groove 22. The accumulation of the liquid on the partition plate 16 is prevented.

[0051] In one embodiment, as shown in Figure 1 , 5As shown, the top of the buffer chamber 20 is provided with a second annular U-shaped groove 43, the top end of the second annular U-shaped groove 43 is communicated with the filter chamber 40 through a second through hole 44, and the bottom is communicated with the buffer chamber 20 through a second blowdown pipe 45, and the second blowdown pipe 45 is provided with a second electromagnetic valve 46. The edge of the second through hole 44 is also smoothly transitioned, which facilitates the flow of liquid carrying particulate impurities into the second annular U-shaped groove 43 and prevents accumulation on the partition plate 16. After being trapped by the filter 41, small particles or liquid droplets continuously accumulate and fall into the second annular U-shaped groove 43 for storage. When it is necessary to discharge particulate and liquid impurities, the second electromagnetic valve 46 is opened, the impurities in the second annular U-shaped groove 43 flow into the buffer chamber 20 below, and then flow into the second annular U-shaped groove 43 below through the annular baffle 21, and then flow into the lower part together with the impurities in the second annular U-shaped groove 43, and finally discharged through the blowdown port 12 at the bottom of the shell 10.

[0052] Specifically, since the buffer chamber 20 is provided with an air inlet pipe 13 on one side wall, in order to avoid affecting the natural gas inlet and facilitate subsequent cleaning, the second annular U-shaped groove 43 and the annular baffle 21 are reasonably arranged. Since the impurities separated by the filter chamber 40 are less, the volume of the second annular U-shaped groove 43 does not need to be too large, and the second annular U-shaped groove 43 can be arranged along the outer side wall of the exhaust pipe 32. The annular baffle 21 at the top of the buffer chamber 20 is arranged on the exhaust pipe 32, and the bottom end outlet of the second blowdown pipe 45 is located above the top annular baffle 21.

[0053] Specifically, the number of the first blowdown pipe 24 and the second blowdown pipe 45 is multiple, which is uniformly distributed below the first annular U-shaped groove 22 and the second annular U-shaped groove 43. The number of the first blowdown pipe 24 and the second blowdown pipe 45 is multiple, which is convenient for discharging the impurities in the groove, and at the same time, it can be better cleaned.

[0054] Specifically, in order to facilitate the replacement of the filter 41, the filter 41 is arranged at the top center of the filter chamber 40 and vertically arranged, and the upper end of the exhaust pipe 42 is sealed and the lower end is exhausted. One end of the gas outlet pipe 14 is connected to the lower end of the exhaust pipe 42, and the other end is bent downward and extends out of the filter chamber 40. When the filter 41 needs to be replaced, the flange cover 11 is opened, and the filter 41 can be easily removed and replaced.

[0055] At the same time, when the shell 10 is cleaned, the flange cover 11 is opened, the cleaning liquid enters the shell 10 from the top, the filter chamber 40 is cleaned first, the cleaning liquid flows into the second annular U-shaped groove 43 from the second through hole 44, the second annular U-shaped groove 43 is washed, then flows into the buffer chamber 20 through the second blowdown pipe 45, flows down along the annular baffle 21, cleans the annular baffle 21, and then flows into the first annular U-shaped groove 22 below through the first through hole 23, the first annular U-shaped groove 22 is washed, then flows into the separation chamber 30 through the first blowdown pipe 24, the separation chamber 30 is cleaned, and finally is discharged through the blowdown port 12.

[0056] According to the characteristics of three-stage separation, the shell 10 is reasonably arranged, the inside of the shell 10 is divided into the filter chamber 40, the buffer chamber 20 and the separation chamber 30 from top to bottom by the partition plate 16, the filter chamber 40 is the third-stage filter, the impurities filtered are few, and the filter 41 occupies a small area, so the space volume of the filter chamber 40 is small; the separation chamber 30 is the second-stage filter, the impurities filtered are more, and the axial flow type cyclone 31 occupies a large area, so the space volume of the separation chamber 30 is large; although the buffer chamber 20 is the first-stage filter, the impurities filtered are the most, but the annular baffle 21 occupies a relatively small area, so the space volume of the buffer chamber 20 is smaller than that of the separation chamber 30 and larger than that of the filter chamber 40, the first annular U-shaped groove 22 is arranged in the separation chamber 30, and the second annular U-shaped groove 43 is arranged in the buffer chamber 20, so as to fully utilize the space in the shell 10.

[0057] In an embodiment, as shown in Figure 1 、 3 The axial flow type cyclone 31 has a cylindrical barrel 34, an inverted conical barrel 35 and an ash hopper 36 connected in sequence from top to bottom. The cylindrical barrel 34 is arranged in the separation chamber 30, the top end of the cylindrical barrel 34 is communicated with the buffer chamber 20, the guide vane 33 is located in the cylindrical barrel 34, and the air inlet of the exhaust pipe 32 is located below the guide vane 33. The ash hopper 36 is communicated with the bottom end of the inverted conical barrel 35, and the vortex cover 37 is arranged at the connection position of the ash hopper 36 and the inverted conical barrel 35.

[0058] In an embodiment, a hand hole 15 is arranged on one side wall of the separation chamber 30, which facilitates the installation and maintenance of the inside of the equipment.

[0059] The working mode of the small combined filter separation device is as follows:

[0060] In operation, natural gas enters the buffer chamber 20 from the gas inlet pipe 13 and hits the multiple annular baffles 21 in turn. Part of the particles and liquid in the natural gas with relatively large particle size are captured by inertia to achieve separation. The particles and liquid continuously accumulate and flow into the lower part along the annular baffles 21, enter the first annular U-shaped groove 22 through the first through hole 23, and are stored in the first annular U-shaped groove 22. The natural gas enters the axial flow cyclone 31 from the lower part, passes through the guide vanes 33, and the remaining particles and liquid impurities adhere to the wall under the action of the centrifugal force of the axial rotating gas flow, so that the gas and particles are layered. The particles and liquid impurities fall into the lower part, the separated gas enters the upper filter chamber 40 through the exhaust pipe 32, the gas entering the filter chamber 40 enters the filter 41 from the side wall of the filter 41, is filtered by the filter 41, is discharged from the central exhaust pipe 42, is discharged from the shell 10 through the gas outlet pipe 14, and the purified natural gas is obtained. The small particles or liquid drops intercepted by the filter 41 continuously accumulate and fall into the second annular U-shaped groove 43 from the second through hole 44. When the impurities need to be discharged, the second electromagnetic valve 46 is opened, the impurities in the second annular U-shaped groove 43 flow into the buffer chamber 20 in the lower part, and then flow into the lower part through the annular baffles 21. The impurities in the second annular U-shaped groove 43 and the impurities in the second annular U-shaped groove 43 flow into the lower part together, and are discharged through the blowdown port 12 at the bottom of the shell 10.

[0061] When cleaning and maintaining, the flange cover 11 is opened, the filter 41 is cleaned and replaced, the cleaning liquid can enter the shell 10 from the upper part, the filter chamber 40 is cleaned first, the cleaning liquid flows into the second annular U-shaped groove 43 in the lower part from the second through hole 44, the second annular U-shaped groove 43 is washed, then flows into the buffer chamber 20 through the second blowdown pipe 45, flows down along the annular baffles 21, washes the annular baffles 21, then flows into the first annular U-shaped groove 22 in the lower part through the first through hole 23, washes the first annular U-shaped groove 22, then flows into the separation chamber 30 through the first blowdown pipe 24, cleans the separation chamber 30, and finally is discharged through the blowdown port 12.

[0062] Based on the above embodiments, the small combined filter and separator device has the following advantages:

[0063] (1) The device has a compact internal structure and a reasonable layout. Only the gas inlet pipe 13, the gas outlet pipe 14 and the hand hole 15 are arranged on the outer side wall, the top is the flange cover 11, and the bottom is the blowdown port 12, so that the device occupies a small area and can be installed in a small place. The device can perform three-stage separation, the performance is much better than that of the traditional scheme, the problem of large space occupied by a single device is solved, the use and maintenance cost of the customer is reduced, and the normal work of the back-end pressure regulating equipment and the metering equipment is ensured.

[0064] (2) The device according to the characteristics of three-stage separation, the shell 10 is reasonably laid out, the shell 10 is divided into filter chamber 40, buffer chamber 20, separation chamber 30 from top to bottom by partition 16, since the filter chamber 40 is the third stage filter, the impurities are less, and the filter 41 occupies small area, so the filter chamber 40 space volume distribution is small; since the separation chamber 30 is the second stage filter, the impurities are more, and the axial flow cyclone 31 occupies large area, so the separation chamber 30 space volume distribution is large; and the buffer chamber 20 is the first stage filter, the impurities are the most, but the annular baffle 21 occupies small area, so the buffer chamber 20 is smaller than the separation chamber 30, and larger than the filter chamber 40, the first annular U-shaped groove 22 is arranged in the separation chamber 30, and the second annular U-shaped groove 43 is arranged in the buffer chamber 20, so as to fully utilize the space in the shell 10.

[0065] (3) The first annular U-shaped groove 22 and the second annular U-shaped groove 43 are arranged at the bottom of the first annular U-shaped groove 22 and the second annular U-shaped groove 43, the drain pipe is communicated with the filter chamber 40, the buffer chamber 20 and the separation chamber 30, the flange cover 11 is opened, the cleaning liquid can enter the shell 10 from the top, and then flow through the filter chamber 40, the buffer chamber 20 and the separation chamber 30, so as to clean the filter chamber 40, the buffer chamber 20 and the separation chamber 30, and finally discharge from the lower drain 12, so as to solve the problem that the existing filter separation device is difficult to clean, and improve the service life of the filter separation device.

[0066] The above is only the preferred embodiment of the present application, and is not used to limit the present application, for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A compact combined filtration and separation device, characterized in that The utility model relates to a kind of air filter, including: Shell, top end is provided with flange cover, bottom end is provided with blowdown outlet;The inside of the shell is divided into filter chamber, buffer chamber, separation chamber from top to bottom by partition plate in turn, and the space volume of the filter chamber, buffer chamber, separation chamber gradually becomes larger;One side wall of the buffer chamber is provided with air inlet pipe, one side wall of the filter chamber is provided with air outlet pipe; Axial-flow cyclone, it is set in the separation chamber, top end is communicated with the buffer chamber, bottom end is communicated with the separation chamber;The center of the axial-flow cyclone is provided with a exhaust pipe, the upper end of the exhaust pipe extends upwards and is communicated with the filter chamber through the buffer chamber;The outer side wall of the exhaust pipe on the top of the axial-flow cyclone is provided with guide vane; Filter, it is set in the filter chamber, below the flange cover;The filter is cylindrical structure, the center is configured as exhaust pipe, the filter is inhaled by side wall, and exhaust by central exhaust pipe after filtration;One end of the air outlet pipe is connected with the exhaust pipe, and the other end extends outside the filter chamber; The top of the separation chamber is provided with first annular U-shaped groove, the top end of the first annular U-shaped groove is communicated with the buffer chamber through first through hole, the bottom is communicated with the separation chamber through first blowdown pipe, and the first blowdown pipe is provided with first electromagnetic valve; The top of the buffer chamber is provided with second annular U-shaped groove, the top end of the second annular U-shaped groove is communicated with the filter chamber through second through hole, and the bottom is communicated with the buffer chamber through second blowdown pipe, and the second blowdown pipe is provided with second electromagnetic valve.

2. The compact combined filtration separation device of claim 1, wherein, A plurality of annular baffles are arranged in the buffer chamber, and the annular baffles are arranged downwardly inclined. The annular baffles are arranged below the air inlet pipe and are arranged in the inner side wall of the buffer chamber and the outer side wall of the exhaust pipe in an alternating manner.

3. The compact combined filtration separation device of claim 2, wherein, The downwardly inclined end of the annular baffle at the bottom of the buffer chamber is located directly above the first through hole.

4. The compact combined filtration separation device of claim 2, wherein, The second annular U-shaped groove is arranged along the outer side wall of the exhaust pipe, the annular baffle at the top of the buffer chamber is arranged on the exhaust pipe, and the bottom outlet of the second blowdown pipe is located above the annular baffle at the top.

5. The compact combined filtration separation device of claim 4, wherein, The number of the first blowdown pipe and the second blowdown pipe is multiple, and they are uniformly distributed below the first annular U-shaped groove and the second annular U-shaped groove.

6. The compact combined filtration separation device of claim 1, wherein, The axial-flow cyclone has: A cylindrical barrel is arranged in the separation chamber, and the top end of the cylindrical barrel is communicated with the buffer chamber;The guide vane is located in the cylindrical barrel, and the air inlet of the exhaust pipe is located below the guide vane; An inverted conical barrel is communicated with the bottom end of the cylindrical barrel; A hopper is communicated with the bottom end of the inverted conical barrel, and a vortex cover is arranged at the connection between the hopper and the inverted conical barrel.

7. The compact combined filtration separation device of claim 1, wherein, A hand hole is arranged on one side wall of the separation chamber.

8. The compact combined filtration separation device of claim 1, wherein, The filter is vertically arranged and located at the top center of the filter chamber, the upper end of the exhaust pipe of the filter is sealed, and the lower end of the exhaust pipe is arranged to exhaust air, one end of the air outlet pipe is connected with the lower end of the exhaust pipe, and the other end of the air outlet pipe is bent downwardly and then extends outside the filter chamber.

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