Black powder filtering device

Abstract

The present invention discloses a black powder filtering device with good purification effect. The curling plate is vertically arranged along the axial direction. The upper end of the curling plate is connected to the first partition plate, and the lower end is connected to the ash falling plate. The cross-section of the curling plate is a spiral structure with an increasing arc from the inside to the outside. There is a first opening between the outer end of the curling plate and the adjacent curling plate of the next layer, and the entrance of the curling channel is formed. There is a second opening between the inner end of the curling plate and the adjacent curling plate of the next layer. The second opening communicates with the center of the curling channel and forms the outlet of the curling channel. The air inlet is communicated with the entrance of the curling channel. The air outlet is communicated with the outlet of the curling channel through a through hole formed in the first partition plate. By increasing the number of rotation circles of the air flow in the curling channel, during the rotation of the air flow, the black powder is continuously thrown towards the side wall, and a good filtering effect is achieved for black powder with both small diameters and large diameters.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas production equipment, and in particular to a black powder filtering device. Background Art

[0002] Natural gas is transported through gas pipelines, and impurities such as black powder (hereinafter referred to as black powder) are easily formed in the pipelines. Black powder is mainly composed of ferrosulfide, iron carbonate, iron oxide and sulfur. When there is a lot of black powder in the pipeline, not only the gas flow of the pipeline is far less than the designed gas flow, but also it leads to frequent blockage of downstream separation equipment, gas equipment failure and many other problems, which seriously affect the sale of natural gas and the normal production of downstream users.

[0003] Black powder filter is a filtering device in natural gas projects. Natural gas can be filtered through black powder filter to avoid a significant reduction in pipeline gas transmission volume and to prevent a large amount of black powder from damaging downstream equipment. The existing black powder filter is a cyclone separator, which introduces natural gas containing black powder into the cylinder tangentially to form a rotating motion, so that the black powder solid particles with large inertial centrifugal force are thrown toward the inner wall of the cylinder. Since the centrifugal force on the black powder solid particles is much greater than gravity and inertia, the black powder is separated from the airflow.

[0004] like Figure 1 The cyclone separator shown has a cone structure with a large top and a small bottom. A gas inlet is arranged in the tangential direction of the upper section of the cylinder, a vertical exhaust pipe is installed on the top of the cylinder, and an impurity outlet is arranged at the bottom of the cylinder. Natural gas generally enters the cylinder tangentially from the air inlet at a speed of 12-30m / s, and the natural gas changes from linear motion to circular motion. The rotating airflow moves downward in a spiral along the inner wall of the cylinder, which is an outward rotating airflow A. Under the action of centrifugal force, the black powder is thrown toward the inner wall of the cylinder. The black powder contacts the inner wall of the cylinder, loses its inertial force, and falls along the inner wall of the cylinder under the action of its own gravity, and then is discharged from the impurity outlet. The airflow moving downward in a spiral shape continuously flows into the center of the cylinder during the descent process, forming a centripetal radial airflow. This part of the airflow forms an inward rotating airflow B that moves upward in a spiral, and the purified natural gas is finally discharged through the exhaust pipe. The cyclone separator has a good effect on removing black powder with a diameter of more than 10um, but the removal effect of black powder impurities with a diameter of less than 10um is not obvious. Therefore, the natural gas purified by the cyclone separator still contains a large amount of fine black powder impurities with a diameter less than 10um. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a black powder filtering device with good purification effect.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a black powder filtering device comprises a shell, a first partition, a curling plate, a dust falling plate, a dust falling pipe and a second partition;

[0007] The housing is provided with an air inlet and an air outlet which are arranged vertically.

[0008] The first partition plate, the curling plate, the ash-dropping plate, the ash-dropping pipe and the second partition plate are arranged in sequence from top to bottom and are all installed in the housing.

[0009] The shapes of the first partition plate and the second partition plate are both the same as the shape of the cross-section of the housing, and the outer perimeters of the first partition plate and the second partition plate are respectively connected to the inner wall of the housing.

[0010] The curling plate is arranged vertically along the axis. The upper end of the curling plate is connected to the first partition plate, and the lower end is connected to the ash-dropping plate. The cross-section of the curling plate is a spiral structure with a gradually increasing radian from inside to outside.

[0011] There is a curling gap between adjacent layers of the curling plate, forming a curling channel. There is a first opening between the outer end of the curling plate and the adjacent curling plate, forming the inlet of the curling channel. There is a second opening between the inner end of the curling plate and the adjacent curling plate. The second opening communicates with the center of the curling channel and forms the outlet of the curling channel.

[0012] The air inlet is communicated with the inlet of the curling channel. The air outlet is communicated with the outlet of the curling channel through a through hole opened on the first partition plate.

[0013] A number of ash-dropping holes are opened on the ash-dropping plate. The ash-dropping holes communicate the curling channel with the ash-dropping pipe. The upper end of the ash-dropping pipe is connected to the outer perimeter of the ash-dropping plate, and the lower end is communicated with a connection hole on the second partition plate.

[0014] Further, the ash-dropping pipe includes an ash-collecting bucket and a conduit which are arranged vertically.

[0015] The ash-collecting bucket has an upward opening. The opening end of the ash-collecting bucket is connected to the outer perimeter of the ash-dropping plate.

[0016] An ash-discharging hole is opened on the bottom plate of the ash-collecting bucket. The conduit communicates the ash-discharging hole with the connection hole on the second partition plate.

[0017] Further, the ash-discharging hole is arranged at the center of the bottom plate, and the bottom plate is inclined towards the direction of the ash-discharging hole.

[0018] Further, the curling plate, the ash-dropping plate and the ash-dropping pipe form a separation body. A number of the separation bodies are all installed between the first partition plate and the second partition plate.

[0019] There is a cyclone forming space between a number of the separation bodies and the inner wall of the housing. The air inlet is communicated with the cyclone forming space, and the inlet of the curling channel is communicated with the cyclone forming space.

[0020] The inlet of the curling channel in each of the separation bodies is opposite to the rotation direction of the cyclone and is tangentially arranged.

[0021] Furthermore, it further includes a vertically arranged air guide plate, and the air guide plate is installed between the bottom plate and the second partition plate;

[0022] The air guide plate includes a connection end and a free end. The connection end is connected to the inner wall of the housing, and the free end is located in the inner cavity of the housing; an air guide space with an arc-shaped structure is formed between the air guide plate and the inner wall of the housing;

[0023] The air inlet is correspondingly arranged with the air guide space and is close to the connection end.

[0024] Furthermore, the side of the air guide plate opposite to the air inlet is connected to the outer wall of the conduit.

[0025] Furthermore, the outer end of the curling plate is fixedly connected to the inner wall of the housing.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a black powder filtering device with good purification effect. By increasing the number of rotation circles of the air flow in the curling channel, during the rotation process of the air flow, the black powder is continuously thrown towards the side wall, and it has a good filtering effect on both small-diameter black powder with a diameter less than 10 μm and large-diameter black powder with a diameter greater than 10 μm. The second partition plate separates the filtered black powder at the bottom of the housing, which not only facilitates the collection of the black powder but also prevents secondary pollution of the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of an existing cyclone separator;

[0028] Figure 2 is a schematic structural diagram of the present invention;

[0029] Figure 3 is a schematic structural diagram of the curling channel of the present invention installed in the housing;

[0030] Figure 4 is a schematic structural diagram of the separation body of the present invention;

[0031] Figure 5 is a schematic structural diagram of the air guide plate of the present invention;

[0032] In the figure, the reference numerals of the drawings are: 1 - housing; 101 - air inlet; 102 - air outlet; 2 - first partition plate; 3 - curling plate; 301 - curling channel; 4 - ash falling plate; 401 - ash falling hole; 5 - second partition plate; 6 - inlet; 7 - outlet; 8 - ash collection bucket; 801 - bottom plate; 802 - ash discharge hole; 9 - conduit; 10 - cyclone forming space; 11 - air guide plate; 1101 - air guide space; 12 - exhaust space; 13 - slag discharge space. Detailed implementation mode

[0033] The present invention will be further described below in conjunction with embodiments.

[0034] The black powder filtering device includes a housing 1, a first partition plate 2, a curling plate 3, an ash falling plate 4, an ash falling pipe and a second partition plate 5; the housing 1 is provided with an air inlet 101 and an air outlet 102 arranged up and down; the first partition plate 2, the curling plate 3, the ash falling plate 4, the ash falling pipe and the second partition plate 5 are arranged in sequence from top to bottom and are all installed in the housing 1; the shapes of the first partition plate 2 and the second partition plate 5 are the same as the shape of the cross-section of the housing 1, and the outer circumferences of the first partition plate 2 and the second partition plate 5 are respectively connected to the inner wall of the housing 1.

[0035] The curling plate 3 is arranged vertically along the axis, the upper end of the curling plate 3 is connected to the first partition plate 2, and the lower end is connected to the ash falling plate 4; the cross-section of the curling plate 3 is a spiral structure with gradually increasing radian from inside to outside; there is a curling gap between adjacent layers of the curling plate 3, and a curling channel 301 is formed; there is a first opening between the outer end of the curling plate 3 and the adjacent curling plate 3 of the same layer, and an inlet 6 of the curling channel 301 is formed; there is a second opening between the inner end of the curling plate 3 and the adjacent curling plate 3 of the same layer, the second opening communicates with the center of the curling channel 301, and an outlet 7 of the curling channel 301 is formed; the air inlet 101 is communicated with the inlet 6 of the curling channel 301; the air outlet 102 is communicated with the outlet 7 of the curling channel 301 through a through hole opened on the first partition plate 2; a plurality of ash falling holes 401 are opened on the ash falling plate 4, and the ash falling holes 401 communicate the curling channel 301 with the ash falling pipe; the upper end of the ash falling pipe is connected to the outer circumference of the ash falling plate 4, and the lower end is communicated with a connection hole on the second partition plate 5.

[0036] The spaced first partition plate 2 and second partition plate 5 divide the interior of the housing 1 into an exhaust space 12, an installation space, and a slag discharge space 13 arranged vertically. The coiling plate 3, the ash dropping plate 4, and the ash dropping pipe are all located in the installation space, that is, between the first partition plate 2 and the second partition plate 5. The coiling plate 3 is wound into several layers, and the cross-section of the coiling plate 3 is a spiral structure centered on its axis L and with an increasing radian from the inside to the outside. The cross-section of the coiling channel 301 is also a spiral structure with an increasing radian from the inside to the outside. The first partition plate 2 closes the upper end of the coiling channel 301, and only allows the outlet 7 of the coiling channel 301 to communicate with the through hole on the first partition plate 2. The natural gas to be filtered enters the housing 1 tangentially from the air inlet 101, forms a cyclone, and then enters the coiling channel 301 through the inlet 6 of the coiling channel 301. The air flow makes a rotational movement from the outside to the inside along the coiling channel 301. The air flow moves between two adjacent side walls of the coiling plate 3. For two adjacent side walls, the black powder is thrown towards the side wall with a larger radian. The black powder contacts with this side wall, loses its inertial force, and falls along this side wall to the ash dropping plate 4 under the action of its own gravity, and then enters the ash dropping pipe through the ash dropping hole 401, and finally enters the slag discharge space 13 below the second partition plate 5. The filtered air flow is discharged successively through the outlet 7 of the coiling channel 301, the through hole on the first partition plate 2, and the air outlet 102. The coiling channel 301 increases the number of rotation circles of the air flow. During the rotation of the air flow, the black powder is continuously thrown towards the side wall, and has a good filtering effect on black powder with both small diameters and large diameters.

[0037] The ash dropping pipe can be a cylindrical structure with the same diameter up and down. Preferably, the ash dropping pipe includes an ash collecting barrel 8 and a conduit 9 arranged up and down; the ash collecting barrel 8 has an opening facing upward; the opening end of the ash collecting barrel 8 is connected to the outer periphery of the ash dropping plate 4; the bottom plate 801 of the ash collecting barrel 8 is provided with an ash discharging hole 802, and the conduit 9 communicates the ash discharging hole 802 with the connection hole on the second partition plate 5. The diameter of the conduit 9 is smaller than the diameter of the ash collecting barrel 8. The black powder falls into the ash collecting barrel 8 through the ash dropping hole 401, and then enters the slag discharge space 13 below the second partition plate 5 through the conduit 9.

[0038] In order to increase the flow rate of the black powder, preferably, the ash discharging hole 802 is arranged at the center of the bottom plate 801, and the bottom plate 801 is inclined towards the direction of the ash discharging hole 802. The inclined bottom plate 801 speeds up the movement speed of the black powder and avoids accumulation on the upper surface of the bottom plate 801.

[0039] In order to further improve the filtering effect, preferably, the curly plate 3, the ash dropping plate 4 and the ash dropping pipe form a separation body, and a plurality of the separation bodies are all installed between the first partition plate 2 and the second partition plate 5; there is a cyclone forming space 10 between the plurality of the separation bodies and the inner wall of the housing 1, the air inlet 101 is communicated with the cyclone forming space 10, and the inlet 6 of the curly channel 301 is communicated with the cyclone forming space 10; the inlet 6 of the curly channel 301 in each separation body is opposite to the rotation direction of the cyclone and is tangentially arranged. The airflow entering the housing 1 forms a cyclone in the cyclone forming space 10, and the cyclone airflow respectively enters the curly channels 301 of each separation body. Relatively speaking, for a single separation body, the separation effect of multiple separation bodies is better.

[0040] In one embodiment, there is an installation gap between the outer end of the curly plate 3 and the inner wall of the housing 1. The airflow tangentially enters the housing 1 and forms a cyclone in the installation space between the first partition plate 2 and the second partition plate 5. The rotation direction of the cyclone is tangent to the inlet 6 of the curly channel 301, and the cyclone tangentially enters the inlet 6 of the curly channel 301. In another embodiment, the outer end of the curly plate 3 is fixedly connected to the inner wall of the housing 1. At this time, the air inlet 101 is located below the bottom plate 801. The airflow tangentially enters the housing 1 and forms a cyclone between the lower surface of the bottom plate 801 and the upper surface of the second partition plate 5, and the cyclone forming space 10 is located in the lower part of the installation space.

[0041] In order to further improve the forming effect of the cyclone, preferably, a vertically arranged air guiding plate 11 is further included, and the air guiding plate 11 is installed between the bottom plate 801 and the second partition plate 5; the air guiding plate 11 includes a connecting end and a free end, the connecting end is connected to the inner wall of the housing 1, and the free end is located in the inner cavity of the housing 1; an arc-shaped air guiding space 1101 is formed between the air guiding plate 11 and the inner wall of the housing 1; the air inlet 101 is correspondingly arranged with the air guiding space 1101 and is close to the connecting end. The airflow entering the housing 1 through the air inlet 101 is guided by the arc-shaped air guiding space 1101 and then moves along the inner wall of the housing 1, thereby forming a cyclone rotating around the axis of the housing 1. As the amount of the introduced airflow increases and the air volume is superimposed, the cyclone continuously moves upward and then obliquely cuts into the curly channel 301 from the inlet 6 of the curly channel 301 upward.

[0042] In order to ensure the stable installation of the air guiding plate 11, preferably, the side of the air guiding plate 11 opposite to the air inlet 101 is connected to the outer wall of the conduit 9. When the airflow introduced through the air inlet 101 is relatively large, the outer wall of the conduit 9 provides a force support for the air guiding plate 11 to prevent the air guiding plate 11 from deforming.

[0043] The above is the specific implementation mode of the present invention. It can be seen from the implementation process that the present invention provides a black powder filtering device with good purification effect. By increasing the number of rotation circles of the air flow in the curling channel, during the rotation of the air flow, the black powder is continuously thrown towards the side wall, and it has a good filtering effect on both small-diameter black powder with a diameter less than 10um and large-diameter black powder with a diameter greater than 10um. The second partition separates the filtered black powder at the bottom of the housing, which not only facilitates the collection of the black powder but also prevents secondary pollution of the air flow.

Claims

1. Black powder filtering device, characterized in that: It includes a housing (1), a first partition plate (2), a curling plate (3), an ash-dropping plate (4), an ash-dropping pipe, and a second partition plate (5); The housing (1) is provided with an air inlet (101) and an air outlet (102); The first partition plate (2), the curling plate (3), the ash-dropping plate (4), the ash-dropping pipe, and the second partition plate (5) are arranged in sequence from top to bottom and are all installed in the housing (1); The shapes of the first partition plate (2) and the second partition plate (5) are the same as the shape of the cross-section of the housing (1), and the outer peripheries of the first partition plate (2) and the second partition plate (5) are respectively connected to the inner wall of the housing (1); The curling plate (3) is vertically arranged along the axis. The upper end of the curling plate (3) is connected to the first partition plate (2), and the lower end is connected to the ash-dropping plate (4); The cross-section of the curling plate (3) is a spiral structure with a gradually increasing radian from inside to outside; There is a curling gap between adjacent layers of the curling plate (3), and a curling channel (301) is formed; There is a first opening between the outer end of the curling plate (3) and the adjacent layer of the curling plate (3), and an inlet (6) of the curling channel (301) is formed; There is a second opening between the inner end of the curling plate (3) and the adjacent layer of the curling plate (3), and the second opening communicates with the center of the curling channel (301), and an outlet (7) of the curling channel (301) is formed; The air inlet (101) is communicated with the inlet (6) of the curling channel (301); The air outlet (102) is communicated with the outlet (7) of the curling channel (301) through a through hole opened on the first partition plate (2); A number of ash-dropping holes (401) are opened on the ash-dropping plate (4), and the ash-dropping holes (401) communicate the curling channel (301) with the ash-dropping pipe; The upper end of the ash-dropping pipe is connected to the outer periphery of the ash-dropping plate (4), and the lower end is communicated with a connection hole on the second partition plate (5); The curling plate (3), the ash-dropping plate (4), and the ash-dropping pipe form a separation body, and a number of the separation bodies are all installed between the first partition plate (2) and the second partition plate (5); There is a cyclone forming space (10) between a number of the separation bodies and the inner wall of the housing (1). The air inlet (101) is communicated with the cyclone forming space (10), and the inlet (6) of the curling channel (301) is communicated with the cyclone forming space (10); The inlet (6) of the curling channel (301) in each separation body is opposite to the rotation direction of the cyclone and is tangentially arranged.

2. The black powder filtering device according to claim 1, wherein: The ash-dropping pipe includes an ash collection bucket (8) and a conduit (9) arranged up and down; The ash collection bucket (8) has an opening facing upward; The open end of the ash collection bucket (8) is connected to the outer periphery of the ash-dropping plate (4); A bottom plate (801) of the ash collection bucket (8) is provided with an ash outlet hole (802), and the conduit (9) communicates the ash outlet hole (802) with the connection hole on the second partition plate (5).

3. The black powder filtering device according to claim 2, characterized in that: The ash outlet hole (802) is arranged at the center of the bottom plate (801), and the bottom plate (801) is inclined in the direction of the ash outlet hole (802).

4. The black powder filtering device according to claim 2, characterized in that: It further includes a vertically arranged air guiding plate (11), and the air guiding plate (11) is installed between the bottom plate (801) and the second partition plate (5); The air guiding plate (11) includes a connecting end and a free end. The connecting end is connected to the inner wall of the housing (1), and the free end is located in the inner cavity of the housing (1); an air guiding space (1101) with an arc-shaped structure is formed between the air guiding plate (11) and the inner wall of the housing (1); The air inlet (101) is arranged corresponding to the air guiding space (1101) and is close to the connecting end.

5. The black powder filtering device according to claim 4, wherein: One side of the air guiding plate (11) opposite to the air inlet (101) is connected to the outer wall of the conduit (9).

6. The black powder filtering device according to claim 1, wherein: The outer end of the curling plate (3) is fixedly connected to the inner wall of the housing (1).

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