Large-capacity desanding device

Abstract

The utility model discloses a large-capacity desanding device with high desanding stability and efficiency, which comprises a fine sand filter and a coarse sand filter which are sequentially communicated in the vertical direction, an air outlet is arranged at the top of the fine sand filter, and a drain outlet is arranged at the bottom of the coarse sand filter, and is characterized in that the interior of the coarse sand filter is divided into an upper cavity, a middle cavity and a lower cavity through an upper partition and a lower partition, and the middle cavity is communicated with an air inlet; a sand rotating cylinder is positioned on the lower partition, the top end of the sand rotating cylinder is communicated with the middle cavity, a conical boss seat is arranged in the middle of the inner bottom end of the sand rotating cylinder, and a sand rotating hole communicated with the drain outlet is formed in the conical boss seat; the top end opening of the sand rotating cylinder is matched with a sand rotating device, the sand rotating device comprises an upper sand rotating cylinder, a lower sand rotating cylinder and a middle sand rotating cylinder, the upper part of the upper sand rotating cylinder has outer side Morse taper and is fixedly positioned on the upper partition, the lower part of the upper sand rotating cylinder is suspended in the sand rotating cylinder, the outer part of the lower sand rotating cylinder is in an inverted cone shape, the middle sand rotating cylinder is connected with the upper sand rotating cylinder and the lower sand rotating cylinder, and sand rotating arc-shaped plates are uniformly arranged on the periphery of the middle sand rotating cylinder; the periphery of the sand rotating arc-shaped plate is matched with the inner side of the sand rotating cylinder; the top end of the upper sand rotating cylinder communicates with the upper cavity.

Description

Technical Field

[0001] The utility model relates to a large-capacity sand removal device, in particular to a large-capacity sand removal device for shale gas, belonging to the technical field of shale gas mining equipment. Background Art

[0002] Before using or storing shale gas, a large amount of sand and gravel impurities entrained during mining need to be desanded to ensure the normal use and storage of shale gas. The general desanding method is to use cyclone separation for gas-solid separation, so that the sand and gravel are discharged from the bottom of the cyclone separator. Because high pressure will be formed during the cyclone separation process, the equipment requirements for the entire desanding device are relatively high. In addition, the various types of cyclone structures on the market have different desanding quality and efficiency for shale gas. Therefore, it is necessary to further improve the existing desanding device. Summary of the invention

[0003] In view of the deficiencies in the above-mentioned prior art, the utility model proposes a large-capacity sand removal device, which optimizes and improves the existing rotating sand structure. The sand removal device has good stability, and the sand removal quality and efficiency are further improved.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a large-capacity sand removal device comprises a fine sand filter and a coarse sand filter which are vertically connected in sequence, an air outlet is arranged on the top of the fine sand filter, and a sewage outlet is arranged on the bottom of the coarse sand filter, characterized in that: the coarse sand filter is divided into upper, middle and lower chambers by upper and lower partitions, and the middle chamber is connected with an air inlet; a swirling sand cylinder is positioned on the lower partition, the top of the swirling sand cylinder is connected with the middle chamber, and a conical boss seat is arranged in the middle position of the inner bottom end, and the swirling sand cylinder is connected with the middle chamber ... The conical boss seat is provided with a swirling hole connected to the sewage outlet; the top port of the swirling sand cylinder is matched with a swirling sand device, which includes an upper swirling sand cylinder with an outer Morse taper at the upper part and fixedly positioned on the upper partition, a lower swirling sand cylinder suspended in the swirling sand cylinder and having an inverted cone at the lower part, and a middle swirling sand cylinder connecting the upper swirling sand cylinder and the lower swirling sand cylinder, and swirling sand arc plates are evenly arranged on the outer periphery of the middle swirling sand cylinder; the outer periphery of the swirling sand arc plates is matched with the inner side of the swirling sand cylinder; the top end of the upper swirling sand cylinder is connected to the upper cavity.

[0005] Furthermore, the fine sand filter comprises an upper shell and a lower shell connected by flanges, and a fine sand separator positioned in the upper shell and the lower shell, wherein the fine sand separator has a positioning flange located between the flanges of the upper shell and the lower shell.

[0006] Furthermore, the fine sand separator, the sand vortexer and the sand vortex cylinder have the same central axis.

[0007] Furthermore, the lower chamber is connected to a water injection and cleaning port.

[0008] Furthermore, the sewage outlet is sequentially connected to a double valve group, a sand collector and a sand and liquid discharge outlet.

[0009] Furthermore, an opening and closing valve is provided on the sand and liquid discharge port.

[0010] Furthermore, the diameter of the coarse sand filter is DN400-450mm.

[0011] The beneficial effects of the utility model: through the newly designed cyclone structure, the turbulent flow structure changes between the cyclone, the cyclone tube and the inner wall of the coarse sand filter are utilized, which is more conducive to the shale gas entering therein to be concentrated in the middle position of the cyclone tube for cyclone separation, so that the shale gas entering the coarse sand filter is fully cyclone separated, and then enters the fine sand filter for fine sand filtration, and finally discharged from the outlet. The entire structure uses the cyclone separation principle to effectively separate the sand in the shale gas. Compared with the cyclone separation of the previous structure, the sand removal device of the utility model has better stability, and the sand removal quality and efficiency have been further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 The local map in ;

[0014] Figure 3 yes Figure 1 or Figure 2 The structural diagram of the sand gyroscope. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0016] A kind of Figure 1-3 The large-capacity sand removal device shown in the figure comprises a fine sand filter 2 and a coarse sand filter 8 which are connected vertically in sequence. The top of the fine sand filter 2 is provided with an outlet 1 for outputting qualified shale gas after sand removal. The bottom of the coarse sand filter 8 is provided with a sewage outlet 9 for discharging sand, water, etc. generated during the sand removal process. Figure 1-2It can be seen that the coarse sand filter 8 is divided into upper, middle and lower chambers by upper and lower partitions, and the middle chamber is connected to an air inlet 5 for the entry of shale gas that has not been sand-removed; a sand swirl 6 is positioned on the lower partition, the top of the sand swirl 6 is connected to the middle chamber, and a conical boss seat is provided in the middle position of the inner bottom, and a sand swirl hole connected to the sewage outlet is provided on the conical boss seat; a sand swirl device 4 is matched with the top end of the sand swirl 6, and the sand swirl device 4 includes an upper sand swirl 41 with an outer Morse taper at the upper part and fixedly positioned on the upper partition, a lower sand swirl 43 with an outer inverted cone shape and suspended in the sand swirl 6 at the lower part, and a middle sand swirl connecting the upper sand swirl 41 and the lower sand swirl 43, and sand swirl arc plates 42 are evenly arranged on the outer periphery of the middle sand swirl; the outer periphery of the sand swirl arc plate 42 cooperates with the inner side of the sand swirl 6; the top of the upper sand swirl 41 is connected to the upper chamber.

[0017] In the scheme, the sand swirl 6 passes through the lower partition and is fixedly connected to the lower partition at the port of the sand swirl 6, for example, by welding. The upper part of the sand swirl 4 passes through the upper partition and is fixedly connected to the upper partition at the upper port, for example, by welding. The lower part of the sand swirl 4 extends into the sand swirl 6 and is suspended in the sand swirl 6. Figure 3 The sand swirl 4 is composed of three parts: an upper sand swirl cylinder 41, a middle sand swirl cylinder, and a lower sand swirl cylinder 43, which are integrally cast. The outer circumference of the upper sand swirl cylinder 41 is designed to be a Morse taper structure, and the sand swirl 4 and the coarse sand filter 8 have the same central axis, so that the upper sand swirl cylinder 41 and the inner wall of the coarse sand filter 8 form an acute angle. After the sand-containing shale gas entering from the air inlet 5 enters the middle cavity, it is reflected by the outer circumference of the upper sand swirl cylinder 41 and the inner wall of the coarse sand filter 8, and then passes through the sand swirl arc plate 42 downward at an acute angle to form a swirl in the sand swirl cylinder 6. During the downward swirl, it is reflected upward by the conical boss seat to further swirl. The shale gas passes through the sand swirl 4 upward to the fine sand filter 2 for further filtration, and the sand-containing impurities are discharged downward through the swirl hole.

[0018] Here, the outer periphery of the swirl arc plate 42 cooperates with the inner side of the swirl tube 6, so that the sand-containing shale gas entering the swirl tube 6 swirls uniformly.

[0019] The fine sand filter 2 comprises an upper shell and a lower shell connected by flanges, and a fine sand separator 3 positioned in the upper shell and the lower shell. The fine sand separator 3 has a positioning flange, and the positioning flange is located between the flanges of the upper shell and the lower shell. When the fine sand separator 3 needs to be cleaned, it is only necessary to disassemble the flange connection of the upper shell and the lower shell, which is convenient and quick.

[0020] The fine sand separator 3, the sand swirl 4, and the sand swirl cylinder 6 are on the same central axis, and are also on the same central axis as the cylinder of the coarse sand filter to ensure the swirl effect and the assembly of the equipment. The lower chamber is connected with a water injection and cleaning port (7) for injecting water to clean the collected sand at the bottom of the coarse sand filter 8. The sewage outlet 9 is sequentially connected with a double valve group 10, a sand collector 11 and a sand and liquid discharge port 13. The sand and liquid discharge port 13 is provided with an opening and closing valve 12 for timing or automatic discharge of sewage or sand.

[0021] Finally, the diameter of the coarse sand filter 8 is DN400~450mm, which is used for large-capacity shale gas sand removal, which is practical, stable and effective.

[0022] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A large-capacity sand removal device, comprising a fine sand filter (2) and a coarse sand filter (8) vertically connected in sequence, wherein the top of the fine sand filter (2) is provided with an air outlet (1), and the bottom of the coarse sand filter (8) is provided with a sewage outlet (9), characterized in that: The coarse sand filter (8) is divided into upper, middle and lower chambers by upper and lower partitions, and the middle chamber is connected to an air inlet (5); the lower partition is provided with a swirling sand cylinder (6), the top end of which is connected to the middle chamber, and the middle position of the inner bottom end is provided with a conical boss seat, and the conical boss seat is provided with a swirling sand hole connected to the sewage outlet; the top end of the swirling sand cylinder (6) is matched with a swirling sand device (4), and the swirling sand device (4) includes an outer Morse cone at the upper part The upper sand rotating cylinder (41) is fixedly positioned on the upper partition, the lower sand rotating cylinder (43) is suspended in the sand rotating cylinder (6) and has an inverted cone shape on the outside, and the middle sand rotating cylinder connects the upper sand rotating cylinder (41) and the lower sand rotating cylinder (43), and the outer periphery of the middle sand rotating cylinder is evenly provided with sand rotating arc plates (42); the outer periphery of the sand rotating arc plates (42) is matched with the inner side of the sand rotating cylinder (6); the top end of the upper sand rotating cylinder (41) is communicated with the upper cavity.

2. A large-capacity sand removal device according to claim 1, characterized in that: The fine sand filter (2) comprises an upper shell and a lower shell connected by flanges, and a fine sand separator (3) positioned inside the upper shell and the lower shell, wherein the fine sand separator (3) has a positioning flange, and the positioning flange is located between the flanges of the upper shell and the lower shell.

3. A large-capacity sand removal device according to claim 2, characterized in that: The fine sand separator (3), the sand spinning device (4) and the sand spinning cylinder (6) are coaxial with each other.

4. A large-capacity sand removal device according to claim 1, characterized in that: The lower chamber is connected to a water injection and cleaning port (7).

5. A large-capacity sand removal device according to claim 1 or 4, characterized in that: The sewage outlet (9) is sequentially connected to a double valve group (10), a sand collector (11) and a sand and liquid outlet (13).

6. A large-capacity sand removal device according to claim 5, characterized in that: The sand and liquid discharge port (13) is provided with an opening and closing valve (12).

7. A large-capacity sand removal device according to claim 1, characterized in that: The diameter of the coarse sand filter (8) is DN400-450mm.

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