A dust removal device for the production of admixtures for oil well cement

Abstract

The present invention discloses a dust removal device for the production of admixtures for oil well cement, which relates to the field of oil well cement production and includes a main body. An air inlet is provided at the top of the main body, and a gas collecting hood communicated with the air inlet is fixedly installed at the top of the inner wall of the main body. A fan is installed at the top of the inner wall of the gas collecting hood, and the fan can transport external air into the gas collecting hood. For the dust removal device for the production of admixtures for oil well cement, through the mutual cooperation among two groups of filter cartridges, filter elements, air guide pipes, exhaust pipes, a first control valve and a third control valve, when one side of the filter element reaches the filtration saturation, the other side of the filter element can be used for filtration. Moreover, through the mutual cooperation among a transfer pipe, a second control valve, a backwashing conduit and a fourth control valve, the clean air flow after dust filtration on the working side can be used to reversely wash the filter element on the other side, so as to ensure the continuous and efficient progress of the dust filtration work inside the workshop.

Description

Technical Field

[0001] The present invention relates to the technology of oil well cement production, and particularly relates to a dust removal device for the production of external admixtures for oil well cement. Background Art

[0002] External admixtures for oil well cement are materials mixed in cement to improve its performance and make it meet different operating conditions and technical requirements. They include fly ash, silica fume, slag, expansion agent, bentonite, and gypsum, etc. Since the above-mentioned external admixtures are prone to generate fine dust, during the production and preparation process, there will be more flying dust inside the workshop. To ensure the health and safety of the operators, a dust removal device is generally used to remove the flying dust inside the workshop.

[0003] The commonly used dust removal devices in the production workshop of external admixtures for oil well cement mainly draw air through a fan and then filter the flying dust mixed in the passing air through a filter element arranged inside the equipment, thereby reducing the amount of flying dust inside the workshop. However, in the actual application process of the above-mentioned dust removal equipment, due to the large amount of flying dust generated inside the workshop, its working intensity is high. Therefore, the actual working time of the filter element used for filtration in the equipment is short and it is easy to reach a saturated state, requiring the operator to frequently replace the filter element. This not only increases the cost of removing flying dust, but also requires the operator to spend a lot of time and energy to maintain the dust removal equipment, which is not conducive to the continuous and efficient progress of the dust removal work. Summary of the Invention

[0004] The purpose of the present invention is to provide a dust removal device for the production of external admixtures for oil well cement to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A dust removal device for the production of external admixtures for oil well cement, including a main body. An air inlet is opened at the top of the main body. A gas collecting hood communicated with the air inlet is fixedly installed at the top of the inner wall of the main body. A fan is installed at the top of the inner wall of the gas collecting hood, and the fan can convey the outside air into the gas collecting hood.

[0006] Two filter cartridges are symmetrically installed on both sides of the inner wall of the main body. A support pipe is fixedly connected to the inner side surface of the filter cartridge. The bottom end of the support pipe penetrates through the bottom of the filter cartridge and extends below the filter cartridge. A plurality of through grooves are formed on the surface of the support pipe located inside the filter cartridge. A filter element is arranged outside the support pipe located inside the filter cartridge. The tops of the two filter cartridges are fixedly communicated with the gas collecting hood through first three-way joints by air guide pipes. The bottom end of the support pipe is fixedly communicated with an exhaust pipe, and the end of the exhaust pipe far from the support pipe penetrates through the inner wall of the main body.

[0007] A first control valve is installed on the air guide pipe. The same transfer pipe is fixedly connected between the exhaust pipes on both sides and the support pipes on the same side through a second three-way joint. A second control valve is installed on the transfer pipe. Third control valves are installed on the exhaust pipes on both sides. The outer parts of the two filter cartridges are fixedly connected with an anti-washing conduit. A fourth control valve is installed on the anti-washing conduit. A dust collection box is installed at the bottom end of the anti-washing conduit.

[0008] Furthermore, a PLC controller is arranged on the main body. The PLC controller can control the opening and closing of the first control valve, the second control valve, the third control valve, and the fourth control valve.

[0009] Furthermore, a plurality of groups of dust filtering plates are fixedly installed in the dust collection box from top to bottom in sequence. The plurality of groups of dust filtering plates are arranged in a left-right staggered manner from top to bottom. One end of the dust filtering plate is arranged at an interval from the inner wall of the dust collection box, and the non-fixed end side of the dust filtering plate is inclined downward. The horizontal length value of the dust filtering plate is greater than half of the width value of the dust collection box.

[0010] Furthermore, an exhaust groove is formed at the bottom of the side surface of the main body. A diversion box is fixedly connected between the exhaust groove and the dust collection box. A dust blocking plate corresponding to the diversion box is fixedly installed on the inner wall of the dust collection box. The dust blocking plate is arranged vertically. The diversion box is arranged below the dust filtering plate.

[0011] Furthermore, a dust collection guide plate located below the diversion box is fixedly connected to the inner wall of the dust collection box. The side of the dust collection guide plate away from the diversion box is inclined downward. A dust collection groove is arranged between the non-fixed end of the dust collection guide plate and the inner wall of the dust collection box. The dust collection groove is arranged on the side of the dust collection guide plate away from the diversion box. The width value of the dust collection groove is 5 cm. A vibration motor is fixedly installed outside the dust collection box.

[0012] Furthermore, the non-fixed ends of the dust filtering plate at the lowermost end and the dust collection guide plate are arranged on the same side.

[0013] Furthermore, the anti-washing conduit successively includes a diversion section, a reduced-diameter section, and a thick-diameter section from top to bottom. The diameter value of the reduced-diameter section increases successively from top to bottom. The fourth control valve is installed on the diversion section. The bottom end of the thick-diameter section is fixedly connected to the top of the dust collection box.

[0014] Furthermore, a base is installed at the bottom of the main body. A receiving cavity is formed on one side of the base. A collection box is slidably connected to the inner side surface of the receiving cavity. The bottom of the dust collection box is funnel-shaped, and a dust guide pipe is fixedly connected to the bottom end of the dust collection box. A fifth control valve is installed on the dust guide pipe.

[0015] Further, the bottom end of the dust guide pipe is communicated with the receiving cavity, and the position of the dust guide pipe corresponds to that of the collection box, and the PLC controller can control the opening and closing of the fifth control valve.

[0016] Compared with the prior art, a dust removal device for the production of external admixtures for oil well cement provided by the present invention has the following beneficial effects:

[0017] 1. The dust removal device for the production of external admixtures for oil well cement can use the other side filter element for filtration when one side filter element reaches the filtration saturation through the mutual cooperation between two groups of filter cartridges, filter elements, air guide pipes, exhaust pipes, the first control valve and the third control valve. Moreover, through the mutual cooperation between the transfer pipe, the second control valve, the backwashing conduit and the fourth control valve, the clean air flow after dust filtration on the working side can be used to backwash the filter element on the other side, so as to ensure the continuous and efficient progress of the dust filtration work inside the workshop.

[0018] 2. The dust removal device for the production of external admixtures for oil well cement can effectively collect dust during the backwashing process through the mutual cooperation between the dust filtration plate, the dust blocking plate, the dust collection guide plate and the vibration motor, and can take out the collected dust under the cooperation of the dust guide pipe, the collection box and the fifth control valve, so as to ensure the continuous and stable operation of the dust removal equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the partial sectional structure of the main body and the base provided by an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the partial sectional structure of the filter cartridge provided by an embodiment of the present invention;

[0023] Figure 4 Provided by an embodiment of the present invention Figure 3 The enlarged schematic diagram at position A in

[0024] Figure 5 It is a schematic diagram of the partial sectional structure of the dust collection box provided by an embodiment of the present invention.

[0025] Description of the reference numerals:

[0026] 1. Body; 2. Air inlet; 21. Air collecting hood; 22. Fan; 3. Filter cartridge; 31. Support pipe; 32. Through groove; 33. Filter element; 34. First three-way joint; 35. Air guide pipe; 36. Exhaust pipe; 4. First control valve; 41. Second three-way joint; 42. Transmission pipe; 43. Second control valve; 44. Third control valve; 45. Backwashing conduit; 451. Diversion section; 452. Reducing section; 453. Thick diameter section; 46. Dust collecting box; 47. Fourth control valve; 5. Dust filtering plate; 51. Exhaust slot; 52. Diversion box; 53. Dust blocking plate; 54. Dust collecting guide plate; 55. Dust collecting slot; 56. Vibration motor; 6. Base; 61. Receiving cavity; 62. Collection box; 63. Dust guide pipe; 64. Fifth control valve. Detailed implementation mode

[0027] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0028] Embodiment 1:

[0029] Please refer to Figures 1-5 , a dust removal device for the production of external admixtures for oil well cement, including a body 1. An air inlet 2 is opened at the top of the body 1. An air collecting hood 21 communicated with the air inlet 2 is fixedly installed at the top of the inner wall of the body 1. A fan 22 is installed at the top of the inner wall of the air collecting hood 21. The fan 22 can convey the outside air into the air collecting hood 21;

[0030] Two filter cartridges 3 are symmetrically installed on both sides of the inner wall of the body 1. A support pipe 31 is fixedly connected to the inner side surface of the filter cartridge 3. The bottom end of the support pipe 31 penetrates the bottom of the filter cartridge 3 and extends below the filter cartridge 3. A plurality of through grooves 32 are formed on the surface of the support pipe 31 located inside the filter cartridge 3. A filter element 33 is arranged outside the support pipe 31 located inside the filter cartridge 3. The tops of the two filter cartridges 3 are fixedly communicated with the air collecting hood 21 through first three-way joints 34 by air guide pipes 35. The bottom end of the support pipe 31 is fixedly communicated with an exhaust pipe 36. One end of the exhaust pipe 36 away from the support pipe 31 penetrates the inner wall of the body 1;

[0031] A first control valve 4 is installed on the air guide pipe 35. The two exhaust pipes 36 on the same side are fixedly communicated with the same transmission pipe 42 through a second three-way joint 41 between the exhaust pipes 36 and the support pipes 31 on the same side. A second control valve 43 is installed on the transmission pipe 42. Third control valves 44 are installed on both exhaust pipes 36. A backwashing conduit 45 is fixedly communicated with the outside of the two filter cartridges 3. A fourth control valve 47 is installed on the backwashing conduit 45. A dust collecting box 46 is installed at the bottom end of the backwashing conduit 45.

[0032] It should be added that a PLC controller is provided on the main body 1, and the PLC controller can control the opening and closing of the first control valve 4, the second control valve 43, the third control valve 44, and the fourth control valve 47.

[0033] It should be further explained that in the normal working state, the PLC controls the first control valve 4 on one side to open, and controls the third control valve 44 on the same side to open, while the second control valve 43 and the fourth control valve 47 on the same side are both in the closed state, and the first control valve 4, the third control valve 44, and the fourth control valve 47 on the other side are all in the closed state. At this time, only the filter cartridge 3 on one side is in a completely connected state, and that side is in the working state;

[0034] When backwashing is required, the PLC controller controls the first control valve 4 and the third control valve 44 on the working side to close, and controls the second control valve 43 and the fourth control valve 47 on that side to open, while the first control valve 4 on the other side opens, and the fourth control valve 47 and the third control valve 44 on that side continue to remain closed. In this state, the clean gas after dust filtration on the adjusted working side can be reversely conveyed through the transfer pipe 42 into the support pipe 31, and the filter element 33 on that side can be reversely flushed. And after the flushing is completed, the PLC controller controls the second control valve 43 to close, and controls the third control valve 44 on that side to open, so that the clean gas after dust filtration on the working side can be discharged from the end of the exhaust pipe 36 to the outside of the equipment.

[0035] During the working process, the fan 22 conveys the air mixed with flying dust in the factory building into the air collecting hood 21. Then, the air collecting hood 21 guides the incoming gas so that it enters the filter cartridge 3 on the working side through the air guide pipe 35 on that side. The gas entering the interior of the filter cartridge 3 passes through the filter element 33, enters the interior of the support pipe 31 through the through groove 32, and then is conveyed from the bottom of the support pipe 31 into the exhaust pipe 36 on that side, and finally is discharged from the end of the exhaust pipe 36 on that side. And the flying dust entering the interior of the filter cartridge 3 is filtered out inside the filter cartridge 3 under the filtering action of the filter element 33;

[0036] When the filter element 33 on the working side tends to be in a saturated state, the first control valve 4 and the third control valve 44 on this side are controlled by the PLC controller to close, and the second control valve 43 and the fourth control valve 47 on this side are controlled to open. On the other side, the first control valve 4 is open, and the fourth control valve 47 and the third control valve 44 on this side continue to remain closed. At this time, the connection between the filter cartridge 3 on the initial working side and the air guide pipe 35 and the exhaust pipe 36 on this side is disconnected. In this state, the air hood 21 can introduce the incoming air into the filter cartridge 3 on the adjusted working side, and filter the flying dust in the air through the filter element 33 in the filter cartridge 3. Moreover, the filtered clean gas can enter the transmission pipe 42 from the bottom end of the support pipe 31 on this side, and be reversely conveyed through the transmission pipe 42 to the support pipe 31 on the side to be backwashed, and finally discharged from the through groove 32 on the support pipe 31 on this side to perform reverse flushing on the filter element 33. The airflow with a large amount of flying dust after reverse flushing enters the dust collection box 46 from the backwash conduit 45 on this side;

[0037] After the flushing is completed, the second control valve 43 is controlled by the PLC controller to close, and the third control valve 44 on the working side is controlled to open, so that the clean gas after dust filtration on the working side can flow from the support pipe 31 on this side to the exhaust pipe 36 on this side, and finally be discharged to the outside of the equipment from the end of the exhaust pipe 36 on this side.

[0038] In this embodiment, a plurality of dust filtering plates 5 are fixedly installed in the dust collection box 46 from top to bottom in sequence. The plurality of dust filtering plates 5 are arranged in a left-right staggered manner from top to bottom. One end of the dust filtering plate 5 is arranged at an interval from the inner wall of the dust collection box 46, and the non-fixed end side of the dust filtering plate 5 is inclined downward. The horizontal length value of the dust filtering plate 5 is greater than half of the width value of the dust collection box 46, so that the working area of the dust filtering plate 5 is larger, and there is an overlapping part between the upper and lower adjacent dust filtering plates 5. Thus, the airflow flowing from top to bottom can fully pass through all the dust filtering plates 5, making the filtering effect of the flying dust better.

[0039] It should be added that an exhaust groove 51 is provided at the bottom of the side surface of the main body 1. A diversion box 52 is fixedly connected between the exhaust groove 51 and the dust collection box 46. A dust blocking plate 53 corresponding to the diversion box 52 is fixedly installed on the inner wall of the dust collection box 46. The dust blocking plate 53 is arranged vertically, and the diversion box 52 is arranged below the dust filtering plate 5.

[0040] Furthermore, a dust collection guide plate 54 is fixedly connected to the inner wall of the dust collection box 46 and is located below the diversion box 52. The side of the dust collection guide plate 54 away from the diversion box 52 is inclined downward, and a dust collection groove 55 is provided between the non-fixed end of the dust collection guide plate 54 and the inner wall of the dust collection box 46. The dust collection groove 55 is provided on the side of the dust collection guide plate 54 away from the diversion box 52, and the width value of the dust collection groove 55 is 5 cm, so that the size value of the dust collection groove 55 is relatively small, so that the airflow flowing downward from top to bottom in the dust collection box 46 will not stir up the dust accumulated below the dust collection guide plate 54. A vibration motor 56 is fixedly installed outside the dust collection box 46.

[0041] In this embodiment, the non-fixed end of the lowermost filter dust plate 5 and the non-fixed end of the dust collection guide plate 54 are arranged on the same side, so that when the lowermost filter dust plate 5 discharges dust, the dust falling on its surface can pass through the dust collection groove 55 more quickly.

[0042] During the working process, a large amount of dust entering the backwashing conduit 45 flows downward together with the backwashing airflow, enters the interior of the dust collection box 46 from the top of the dust collection box 46, and flows downward from top to bottom inside it. During the flowing process, under the filtering action of multiple groups of filter dust plates 5, a large amount of dust mixed in the airflow can be filtered, and the filtered airflow passes through the dust blocking plate 53 and the diversion box 52 and is discharged to the outside of the main body 1;

[0043] During the process of the airflow mixed with a large amount of dust flowing inside the dust collection box 46, when the amount of dust attached to the surface of the upper filter dust plate 5 hinders the passage of the airflow, the airflow can flow downward from the gap between the inclined bottom end of the filter dust plate 5 and the inner wall of the dust collection box 46, so that the dust entering it can be fully filtered;

[0044] After the backwashing work of the filter element 33 is completed and each valve control is completed, the PLC controls the vibration motor 56 to start. The vibration motor 56 starts to drive the entire dust collection box 46 to vibrate, so that the filter dust plate 5, the dust collection guide plate 54, and the dust blocking plate 53 inside it all vibrate, so that the dust attached to their surfaces can slide downward under the action of its own weight, and finally pass through the dust collection groove 55 and fall to the bottom of the dust collection box 46 for storage, so that the dust on the filter dust plate 5 and the dust blocking plate 53 can be separated and will not hinder their subsequent normal work.

[0045] Embodiment 2:

[0046] Please refer to Figure 3 , this embodiment provides a technical solution on the basis of the above embodiment: the backwashing conduit 45 successively includes a diversion section 451, a reduced diameter section 452, and a thick diameter section 453 from top to bottom. The diameter value of the reduced diameter section 452 increases successively from top to bottom. The fourth control valve 47 is installed on the diversion section 451, and the bottom end of the thick diameter section 453 is fixedly communicated with the top of the dust collection box 46.

[0047] During the working process, through the mutual cooperation of the variable-diameter section 452 and the thick-diameter section 453, the gas flow rate of the backwashing gas can be slowed down, so that after it enters the dust collection box 46, the dust contained therein can be better filtered out, and it is not easy to stir up the dust accumulated at the bottom.

[0048] Embodiment 3:

[0049] Please refer to Figure 2 , on the basis of the above embodiment, this embodiment provides a technical solution: a base 6 is installed at the bottom of the body 1, a receiving cavity 61 is opened on one side of the base 6, a collecting box 62 is slidably connected to the inner side surface of the receiving cavity 61, the bottom of the dust collection box 46 is funnel-shaped, and a dust guide pipe 63 is fixedly communicated with the bottom end of the dust collection box 46, and a fifth control valve 64 is installed on the dust guide pipe 63.

[0050] It should be noted that the bottom end of the dust guide pipe 63 is communicated with the receiving cavity 61, and the position of the dust guide pipe 63 corresponds to that of the collecting box 62, and the PLC controller can control the opening and closing of the fifth control valve 64.

[0051] When the amount of dust accumulated at the bottom of the dust collection box 46 is relatively large, the PLC controller controls the fifth control valve 64 to open, so that the dust at the bottom of the dust collection box 46 can pass through the bottom dust guide pipe 63 and fall into the collecting box 62, thus facilitating the treatment of the collected dust.

[0052] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A dust removal device for the production of admixtures for oil well cement, comprising a main body (1), characterized in that, An air inlet (2) is provided at the top of the body (1). A gas collecting hood (21) communicated with the air inlet (2) is fixedly installed at the top of the inner wall of the body (1). A fan (22) is installed at the top of the inner wall of the gas collecting hood (21), and the fan (22) can convey the outside air into the gas collecting hood (21). Two filter cartridges (3) are symmetrically installed on both sides of the inner wall of the body (1). A support pipe (31) is fixedly connected to the inner side surface of the filter cartridge (3). The bottom end of the support pipe (31) penetrates through the bottom of the filter cartridge (3) and extends below the filter cartridge (3). A plurality of through grooves (32) are formed on the surface of the support pipe (31) located inside the filter cartridge (3). A filter element (33) is arranged outside the support pipe (31) located inside the filter cartridge (3). The tops of the two filter cartridges (3) are fixedly communicated with the gas collecting hood (21) through first three-way joints (34) by air guide pipes (35). The bottom end of the support pipe (31) is fixedly communicated with an exhaust pipe (36), and one end of the exhaust pipe (36) away from the support pipe (31) penetrates through the inner wall of the body (1). A first control valve (4) is installed on the air guide pipe (35). The two exhaust pipes (36) and the support pipe (31) on the same side are fixedly communicated with the same transmission pipe (42) through a second three-way joint (41). A second control valve (43) is installed on the transmission pipe (42). Third control valves (44) are installed on both exhaust pipes (36). An anti-flushing conduit (45) is fixedly communicated with the outside of the two filter cartridges (3). A fourth control valve (47) is installed on the anti-flushing conduit (45). A dust collecting box (46) is installed at the bottom end of the anti-flushing conduit (45). The anti-flushing conduit (45) successively includes a diversion section (451), a reduced-diameter section (452), and a thick-diameter section (453) from top to bottom. The diameter value of the reduced-diameter section (452) increases successively from top to bottom. The fourth control valve (47) is installed on the diversion section (451). The bottom end of the thick-diameter section (453) is fixedly communicated with the top of the dust collecting box (46). Inside the dust collection box (46), multiple groups of dust filtering plates (5) are fixedly installed in sequence from top to bottom. The multiple groups of dust filtering plates (5) are arranged in a staggered manner from top to bottom, left and right. At the bottom of the side of the main body (1), an exhaust groove (51) is opened. A diversion box (52) is fixedly connected between the exhaust groove (51) and the dust collection box (46). A dust blocking plate (53) corresponding to the diversion box (52) is fixedly installed on the inner wall of the dust collection box (46). The dust blocking plate (53) is arranged vertically. The diversion box (52) is arranged below the dust filtering plate (5). A dust collection guide plate (54) located below the diversion box (52) is fixedly connected to the inner wall of the dust collection box (46). The side of the dust collection guide plate (54) away from the diversion box (52) is inclined downward. And a dust collection groove (55) is arranged between the non-fixed end of the dust collection guide plate (54) and the inner wall of the dust collection box (46). The dust collection groove (55) is arranged on the side of the dust collection guide plate (54) away from the diversion box (52). The width value of the dust collection groove (55) is 5 cm. A vibration motor (56) is fixedly installed outside the dust collection box (46).

2. The dust removal device for the production of admixtures for oil well cement according to claim 1, characterized in that, A PLC controller is arranged on the main body (1). The PLC controller can control the opening and closing of the first control valve (4), the second control valve (43), the third control valve (44), and the fourth control valve (47).

3. The dust removal device for producing external admixture for oil well cement according to claim 2, characterized in that, One end of the dust filtering plate (5) is spaced from the inner wall of the dust collection box (46). And the non-fixed end side of the dust filtering plate (5) is inclined downward. The horizontal length value of the dust filtering plate (5) is greater than half of the width value of the dust collection box (46).

4. The dust removal device for the production of admixtures for oil well cement according to claim 3, characterized in that, The non-fixed ends of the dust filtering plate (5) at the lowermost end and the dust collection guide plate (54) are arranged on the same side.

5. The dust removal device for the production of admixtures for oil well cement according to claim 4, characterized in that, A base (6) is installed at the bottom of the main body (1). A receiving cavity (61) is opened on one side of the base (6). A collection box (62) is slidably connected to the inner side surface of the receiving cavity (61). The bottom of the dust collection box (46) is funnel-shaped. And a dust guiding pipe (63) is fixedly connected to the bottom end of the dust collection box (46). A fifth control valve (64) is installed on the dust guiding pipe (63).

6. The dust removal device for the production of external admixtures for oil well cement according to claim 5, characterized in that, The bottom end of the dust guiding pipe (63) is communicated with the receiving cavity (61). And the position of the dust guiding pipe (63) corresponds to the collection box (62). The PLC controller can control the opening and closing of the fifth control valve (64).

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