Dust removal device for production of admixture for oil well cement

Abstract

The invention discloses a dust removal device for production of an admixture for oil well cement, and relates to the field of oil well cement production.The dust removal device comprises a body, an air inlet is formed in the top of the body, an air collecting hood communicated with the air inlet is fixedly installed at the top of the inner wall of the body, and a fan is installed at the top of the inner wall of the air collecting hood; and the fan can convey external air into the gas collecting hood. According to the dust removal device for producing the admixture for the oil well cement, through mutual cooperation of the two groups of filter cartridges, the filter elements, the gas guide pipe, the exhaust pipe, the first control valve and the third control valve, the filter element on the other side can be adopted for filtering when the filter element on one side reaches filtering saturation; and through mutual cooperation of the transmission pipe, the second control valve, the backwashing guide pipe and the fourth control valve, the filter element on the other side can be subjected to backwashing by utilizing clean airflow obtained after dust filtration on the working side, so that continuous and efficient operation of fly dust filtration work in the plant can be ensured.

Description

Technical Field

[0001] The invention relates to oil well cement production technology, in particular to a dust removal device used in the production of admixtures for oil well cement. Background Art

[0002] Oil well cement admixtures are materials mixed into cement to improve its performance and meet different operating conditions and technical requirements. They include fly ash, silica fume, slag, expansion agent, bentonite and gypsum. Since the above admixtures are prone to produce fine dust, a lot of flying dust will be generated inside the factory during the production and preparation process. In order to ensure the health and safety of the operators, dust removal equipment is generally used to remove the flying dust inside the factory.

[0003] The dust removal device commonly used in the oil well cement admixture production plant mainly uses fans to draw air, and then uses the filter element installed inside the equipment to filter out the flying dust mixed in the passing air, thereby reducing the amount of flying dust inside the plant. However, in the actual application of the above-mentioned dust removal equipment, due to the large amount of flying dust generated inside the plant, its working intensity is high. Therefore, the actual working time of the filter element used for filtering in the equipment is short and it is easy to reach a saturation state, requiring operators to frequently replace the filter element, which not only increases the cost of removing the flying dust, but also requires operators to spend more time and energy to maintain the dust removal equipment, which is not conducive to the continuous and efficient performance of the dust removal work. Summary of the invention

[0004] The object of the present invention is to provide a dust removal device for producing admixtures for oil well cement, so as to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a dust removal device for producing admixtures for oil well cement, comprising a body, an air inlet is opened on the top of the body, an air collecting hood connected to the air inlet is fixedly installed on the top of the inner wall of the body, a fan is installed on the top of the inner wall of the air collecting hood, and the fan can transport external air to the inside of the air collecting hood;

[0006] Two filter cartridges are symmetrically installed on both sides of the inner wall of the body, the inner side of the filter cartridge is fixedly connected with a support tube, the bottom end of the support tube passes through the bottom of the filter cartridge and extends to the bottom of the filter cartridge, a plurality of through grooves are opened on the surface of the support tube inside the filter cartridge, a filter element is arranged on the outside of the support tube inside the filter cartridge, the top of the filter cartridge on both sides is fixedly connected to the air collecting hood through a first three-way joint, the bottom end of the support tube is fixedly connected with an exhaust pipe, and the end of the exhaust pipe away from the support tube passes through the inner wall of the body;

[0007] A first control valve is installed on the air duct, and the exhaust pipes on both sides are fixedly connected to the support pipe on the same side through a second three-way joint with a same transmission pipe, and a second control valve is installed on the transmission pipe. A third control valve is installed on the exhaust pipes on both sides, and the outsides of the two filter cartridges are fixedly connected to a backwash duct, and a fourth control valve is installed on the backwash duct, and a dust box is installed at the bottom end of the backwash duct.

[0008] Furthermore, a PLC controller is provided on the main body, and 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 filter plates are fixedly installed in sequence from top to bottom inside the dust box, and the plurality of groups of dust filter plates are staggered left to right from top to bottom, one end of the dust filter plate is spaced apart from the inner wall of the dust box, and one side of the non-fixed end of the dust filter plate is tilted downward, and the horizontal length of the dust filter plate is greater than half of the width of the dust box.

[0010] Furthermore, an exhaust groove is provided at the bottom of the side of the main body, and a guide box is fixedly connected between the exhaust groove and the dust collecting box. A dust blocking plate corresponding to the guide box is fixedly installed on the inner wall of the dust collecting box. The dust blocking plate is vertically arranged, and the guide box is arranged below the dust filter plate.

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

[0012] Furthermore, the non-fixed end of the dust filter plate at the bottom and the non-fixed end of the dust collecting guide plate are arranged on the same side.

[0013] Furthermore, the backwash duct includes a guide section, a variable diameter section and a large diameter section from top to bottom, the diameter value of the variable diameter section increases from top to bottom, the fourth control valve is installed on the guide section, and the bottom end of the large diameter section is fixedly connected to the top of the dust collecting box.

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

[0015] Furthermore, the bottom end of the dust guide tube is communicated with the receiving chamber, and the position of the dust guide tube corresponds to the collecting box, and the PLC controller can control the fifth control valve to open and close.

[0016] Compared with the prior art, the dust removal device for producing 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 admixtures for oil well cement can use the filter element on the other side for filtering when the filter element on one side reaches filtration saturation through the mutual cooperation between two groups of filter cartridges, filter elements, air guide pipes, exhaust pipes, first control valves and third control valves. In addition, the clean airflow after dust filtration on the working side can be used to reversely flush the filter element on the other side through the mutual cooperation between the transmission pipe, the second control valve, the backwash duct and the fourth control valve, thereby ensuring the continuous and efficient dust filtration work inside the factory.

[0018] 2. The dust removal device used 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 filter plate, the dust blocking plate, the dust collecting guide plate and the vibration motor, and can remove and process the collected dust with the cooperation between the dust guide pipe, the collection box and the fifth control valve, thereby ensuring the continuous and stable operation of the dust removal equipment. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0021] Figure 2 A schematic diagram of a partial cross-sectional structure of a body and a base provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a partial cross-sectional structure of a filter cartridge provided in an embodiment of the present invention;

[0023] Figure 4 The embodiment of the present invention provides Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 A schematic diagram of a partial cross-sectional structure of a dust collecting box provided in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Main body; 2. Air inlet; 21. Air hood; 22. Fan; 3. Filter cartridge; 31. Support tube; 32. Through slot; 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. Backwash duct; 451. Guide section; 452. Variable diameter section; 453. Coarse diameter section; 46. Dust box; 47. Fourth control valve; 5. Dust filter plate; 51. Exhaust slot; 52. Guide box; 53. Dust blocking plate; 54. Dust guide plate; 55. Dust collecting slot; 56. Vibration motor; 6. Base; 61. Receiving chamber; 62. Collection box; 63. Dust guide pipe; 64. Fifth control valve. DETAILED DESCRIPTION

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

[0028] Embodiment 1:

[0029] See also Figure 1-Figure 5 A dust removal device for producing admixtures for oil well cement comprises a body 1, an air inlet 2 is provided at the top of the body 1, an air collecting hood 21 connected to 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, and the fan 22 can transport external air to the inside of the air collecting hood 21;

[0030] Two filter cartridges 3 are symmetrically installed on both sides of the inner wall of the body 1, and the inner side of the filter cartridge 3 is fixedly connected with a support tube 31, the bottom end of the support tube 31 passes through the bottom of the filter cartridge 3 and extends to the bottom of the filter cartridge 3, a plurality of through grooves 32 are opened on the surface of the support tube 31 inside the filter cartridge 3, and a filter element 33 is arranged outside the support tube 31 inside the filter cartridge 3. The top of the filter cartridges 3 on both sides and the air collecting cover 21 are fixedly connected with an air guide tube 35 through a first three-way joint 34, and the bottom end of the support tube 31 is fixedly connected with an exhaust pipe 36, and the end of the exhaust pipe 36 away from the support tube 31 passes through the inner wall of the body 1;

[0031] A first control valve 4 is installed on the air guide pipe 35, and the exhaust pipes 36 on both sides are fixedly connected to the support pipe 31 on the same side with a same transmission pipe 42 through a second three-way joint 41. A second control valve 43 is installed on the transmission pipe 42. A third control valve 44 is installed on the exhaust pipes 36 on both sides. A backwash duct 45 is fixedly connected to the outside of the two filter cartridges 3, and a fourth control valve 47 is installed on the backwash duct 45. A dust box 46 is installed at the bottom end of the backwash duct 45.

[0032] It should be supplemented 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, under normal working conditions, 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 a 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 a closed state. At this time, only the filter cartridge 3 on one side is in a fully connected state, and this side is in a working state;

[0034] When backwashing is required, the first control valve 4 and the third control valve 44 on the working side are closed through the PLC controller, and the second control valve 43 and the fourth control valve 47 on this side are opened, while the first control valve 4 on the other side is opened, and the fourth control valve 47 and the third control valve 44 on this side continue to remain closed. In this state, the clean gas after dust filtration on the adjusted working side can be reversely transported to the support pipe 31 through the transmission pipe 42, and the filter element 33 on this side can be reversely flushed. After the flushing is completed, the second control valve 43 is closed and the third control valve 44 on this side is opened through the PLC controller, 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 operation, the air mixed with flying dust in the factory is transported to the inside of the air collecting hood 21 through the fan 22, and then the incoming gas is guided by the air collecting hood 21 to enter the filter cartridge 3 on this side from the air guide pipe 35 on the working side. The gas entering the filter cartridge 3 passes through the filter element 33, enters the inside of the support tube 31 from the through groove 32, and is then transported from the bottom of the support tube 31 to the exhaust pipe 36 on this side, and is finally discharged from the end of the exhaust pipe 36 on this side. The flying dust entering 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 saturated, the first control valve 4 and the third control valve 44 on this side are controlled to be closed by the PLC controller, and the second control valve 43 and the fourth control valve 47 on this side are controlled to be opened, while the first control valve 4 on the other side is opened, 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 collecting hood 21 can introduce the incoming air into the adjusted working side filter cartridge 3, and filter the flying dust in the air through the filter element 33 in the filter cartridge 3, and 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 transported to the support pipe 31 on the side to be backwashed through the transmission pipe 42, and finally discharged from the through groove 32 on the support pipe 31 on this side to backwash the filter element 33, and the airflow carrying a large amount of flying dust after backwashing enters the dust collecting box 46 from the backwashing duct 45 on this side;

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

[0038] In the present embodiment, a plurality of groups of dust filter plates 5 are fixedly installed in sequence from top to bottom inside the dust box 46, and the plurality of dust filter plates 5 are staggered left to right from top to bottom. One end of the dust filter plate 5 is spaced from the inner wall of the dust box 46, and the non-fixed end of the dust filter plate 5 is tilted downward. The horizontal length of the dust filter plate 5 is greater than half of the width of the dust box 46, so that the working area of ​​the dust filter plate 5 is larger, and at the same time, there is an overlapping part between the upper and lower adjacent dust filter plates 5, so that the airflow flowing from top to bottom can fully pass through all the dust filter plates 5, so that the filtering effect of flying dust is better.

[0039] It should be supplemented that an exhaust groove 51 is opened at the bottom of the side of the main body 1, and a guide box 52 is fixedly connected between the exhaust groove 51 and the dust collecting box 46. A dust blocking plate 53 corresponding to the guide box 52 is fixedly installed on the inner wall of the dust collecting box 46. The dust blocking plate 53 is vertically arranged, and the guide box 52 is arranged below the dust filter plate 5.

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

[0041] In this embodiment, the non-fixed end of the dust filter plate 5 at the bottom is arranged on the same side as the non-fixed end of the dust collecting guide plate 54, so that when the dust filter plate 5 at the bottom is discharging dust, the dust falling from its surface can pass through the dust collecting groove 55 more quickly.

[0042] During operation, a large amount of dust entering the backwash duct 45 flows downward along with the backwash airflow, and enters the interior of the dust collecting box 46 from the top of the dust collecting box 46, and flows from top to bottom therein. During the flow process, under the filtering effect of the multiple groups of dust filter 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 guide box 52 and is discharged to the outside of the body 1;

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

[0044] When the backwashing of the filter element 33 is completed and the control of each valve is completed, the PLC controls the vibration motor 56 to start, and the vibration motor 56 starts to drive the dust box 46 to vibrate as a whole, so that the dust filter plate 5 and the dust guide plate 54 and the dust blocking plate 53 inside it are vibrated, so that the dust attached to the surface can slide downward under the action of its own weight, and finally pass through the dust collecting groove 55 and fall to the bottom of the dust box 46 for storage, so that the dust on the dust filter plate 5 and the dust blocking plate 53 can be detached, and will not hinder their subsequent normal operation.

[0045] Embodiment 2:

[0046] See also Figure 3 This embodiment provides a technical solution based on the above embodiment: the backwash duct 45 includes a guide section 451, a variable diameter section 452 and a large diameter section 453 from top to bottom, the diameter value of the variable diameter section 452 increases from top to bottom, the fourth control valve 47 is installed on the guide section 451, and the bottom end of the large diameter section 453 is fixedly connected to the top of the dust collecting box 46.

[0047] During operation, the variable diameter section 452 and the large diameter section 453 cooperate with each other to slow down the flow rate of the backwashing gas, so that after entering the dust box 46, the impurities contained therein can be better filtered out and the dust accumulated at the bottom is not easily stirred up.

[0048] Embodiment 3:

[0049] See also Figure 2 This embodiment provides a technical solution based on the above embodiment: 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 collecting box 62 is slidably connected to the inner side of the receiving cavity 61, the bottom of the dust box 46 is funnel-shaped, and the bottom end of the dust box 46 is fixedly connected to a dust guide pipe 63, 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 tube 63 is connected to the receiving chamber 61, and the position of the dust guide tube 63 corresponds to the collecting box 62. The PLC controller can control the fifth control valve 64 to open and close.

[0051] When a large amount of dust accumulates at the bottom of the dust box 46, the PLC controller controls the fifth control valve 64 to open, so that the dust at the bottom of the dust box 46 can pass through the bottom dust guide pipe 63 and fall into the collection box 62, thereby facilitating the processing of the collected dust.

[0052] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dust removal device for producing 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); an air collecting hood (21) connected to the air inlet (2) is fixedly mounted at the top of the inner wall of the body (1); a fan (22) is mounted at the top of the inner wall of the air collecting hood (21); and the fan (22) can transport external air into the air collecting hood (21); Two filter cartridges (3) are symmetrically mounted on both sides of the inner wall of the body (1); the inner side surface of the filter cartridge (3) is fixedly connected to a support tube (31); the bottom end of the support tube (31) passes through the bottom of the filter cartridge (3) and extends to the bottom of the filter cartridge (3); a plurality of through grooves (32) are provided on the surface of the support tube (31) inside the filter cartridge (3); a filter element (33) is provided outside the support tube (31) inside the filter cartridge (3); an air guide tube (35) is fixedly connected between the top ends of the filter cartridges (3) on both sides and the air collecting hood (21) via a first three-way joint (34); the bottom end of the support tube (31) is fixedly connected to an exhaust pipe (36); the end of the exhaust pipe (36) away from the support tube (31) passes through the inner wall of the body (1); A first control valve (4) is installed on the air guide pipe (35); the exhaust pipes (36) on both sides are fixedly connected to the support pipe (31) on the same side via a second three-way joint (41); a second control valve (43) is installed on the transmission pipe (42); a third control valve (44) is installed on the exhaust pipes (36) on both sides; a backwashing conduit (45) is fixedly connected to the outside of the two filter cartridges (3); a fourth control valve (47) is installed on the backwashing conduit (45); and a dust collecting box (46) is installed at the bottom end of the backwashing conduit (45).

2. A dust removal device for production of admixtures for oil well cement according to claim 1, characterized in that: The body (1) is provided with a PLC controller, 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).

3. A dust removal device for production of admixtures for oil well cement according to claim 1, characterized in that: A plurality of groups of dust filter plates (5) are fixedly installed in sequence from top to bottom inside the dust collecting box (46); the plurality of groups of dust filter plates (5) are staggered from top to bottom and from left to right; one end of the dust filter plate (5) is spaced from the inner wall of the dust collecting box (46); and one side of the non-fixed end of the dust filter plate (5) is tilted downward; the horizontal length of the dust filter plate (5) is greater than half of the width of the dust collecting box (46).

4. A dust removal device for production of admixtures for oil well cement according to claim 3, characterized in that: An exhaust groove (51) is provided at the bottom of the side of the body (1); a guide box (52) is fixedly connected between the exhaust groove (51) and the dust collecting box (46); a dust blocking plate (53) corresponding to the guide box (52) is fixedly installed on the inner wall of the dust collecting box (46); the dust blocking plate (53) is vertically arranged; and the guide box (52) is arranged below the dust filter plate (5).

5. A dust removal device for production of admixtures for oil well cement according to claim 4, characterized in that: The inner wall of the dust collecting box (46) is fixedly connected with a dust collecting guide plate (54) located below the guide box (52); the dust collecting guide plate (54) is arranged to be tilted downward on the side away from the guide box (52); a dust collecting groove (55) is arranged between the non-fixed end of the dust collecting guide plate (54) and the inner wall of the dust collecting box (46); the dust collecting groove (55) is arranged on the side of the dust collecting guide plate (54) away from the guide box (52); the width of the dust collecting groove (55) is 5 cm; and a vibration motor (56) is fixedly installed on the outside of the dust collecting box (46).

6. A dust removal device for production of admixtures for oil well cement according to claim 5, characterized in that: The non-fixed end of the dust filter plate (5) located at the lowest end and the non-fixed end of the dust collecting guide plate (54) are arranged on the same side.

7. A dust removal device for production of admixtures for oil well cement according to claim 6, characterized in that: The backwash conduit (45) comprises, from top to bottom, a guide section (451), a diameter-reducing section (452) and a large-diameter section (453), the diameter value of the diameter-reducing section (452) increases from top to bottom, the fourth control valve (47) is mounted on the guide section (451), and the bottom end of the large-diameter section (453) is fixedly connected to the top of the dust collecting box (46).

8. A dust removal device for producing admixtures for oil well cement according to claim 6, characterized in that: 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 of the receiving cavity (61), the bottom of the dust collecting box (46) is funnel-shaped, and the bottom end of the dust collecting box (46) is fixedly connected to a dust guide pipe (63), and a fifth control valve (64) is installed on the dust guide pipe (63).

9. A dust removal device for production of admixtures for oil well cement according to claim 8, characterized in that: The bottom end of the dust guide tube (63) is in communication with the receiving chamber (61), and the position of the dust guide tube (63) corresponds to the collecting box (62). The PLC controller can control the fifth control valve (64) to open and close.

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