A dust removal device suitable for offshore cementing equipment and a control method thereof

Abstract

The application discloses a dust removal device suitable for offshore cementing equipment and a control method thereof, and solves the technical problem that the existing dust removal tank has limited volume and cannot continuously remove dust and collect dust. The dust removal device comprises a constant pressure tank, a dust removal tank and an ash-gas separator, and further comprises: an exhaust pipeline connected at one end with an exhaust end of the constant pressure tank and at the other end with an inlet end of the ash-gas separator; a recovery pipeline connected at one end with an ash discharge end of the dust removal tank and at the other end with an ash inlet end of the constant pressure tank; and a blowing pipeline connected at one end with the ash discharge end of the dust removal tank and at the other end with a gas source. The gas source is used for conveying gas to the blowing pipeline, so that the powder discharged from the ash discharge end of the dust removal tank can enter the constant pressure tank through the recovery pipeline. The application overcomes the problem of limited volume of the dust removal tank, can continuously and effectively remove dust and collect dust in long-time cementing operation, does not need to interrupt the cementing operation, improves the cementing operation efficiency, and can also improve the problems of powder waste and environmental pollution.

Description

Technical Field

[0001] This invention belongs to the technical field of dust removal devices, specifically relating to a dust removal device and its control method suitable for offshore cementing equipment. Background Technology

[0002] Cementing is a crucial step in drilling and completion engineering. It involves injecting cement slurry of a specific density and volume into the wellbore under high pressure to protect the casing, isolate the formation, and establish pathways for oil and gas flow. In oilfield cementing projects, large quantities of powdery materials such as cement are frequently and continuously transported for cement slurry preparation. Currently, the most commonly used dust removal devices are bag filters and cyclone centrifugal dust collectors.

[0003] However, due to the extensive development of deep water and deep wells, the dust collection tanks, which combine bag filters and cyclone centrifugal dust collectors, have limited capacity. When the dust collection tank is full of powder, the cementing operation must be interrupted and the tank emptied, or the dust collection tank bypass must be opened to directly release the powder into the atmosphere. Interrupting the cementing operation and emptying the dust collection tank will affect the efficiency of the cementing operation, while opening the bypass and directly releasing the powder into the atmosphere will cause powder waste and environmental pollution, which need to be improved. Summary of the Invention

[0004] In order to solve all or part of the above problems, the purpose of this invention is to provide a dust removal device and its control method suitable for offshore cementing equipment, which overcomes the problem of limited dust removal tank volume, and can continuously and effectively remove dust and perform backflushing during long-term cementing operations without interrupting the cementing operation, ensuring the timeliness of the cementing operation, while also effectively improving the problems of powder waste and environmental pollution.

[0005] In a first aspect, the present invention provides a dust removal device suitable for offshore cementing equipment, comprising:

[0006] A constant pressure tank is used to connect ash storage tanks and slurry mixing equipment;

[0007] Dust collection canister, used to collect powder materials;

[0008] A dust collector is installed on top of the dust collection tank, and the dust discharge end of the dust collector is connected to the dust collection tank.

[0009] An exhaust pipe is connected at one end to the exhaust end of the constant pressure tank and at the other end to the inlet end of the ash gas separator, and a first control valve is provided at the exhaust end of the constant pressure tank.

[0010] The recycling pipeline is connected at one end to the ash discharge end of the dust collector and at the other end to the ash inlet end of the constant pressure tank. The ash discharge end of the dust collector is equipped with a second control valve, and the ash inlet end of the constant pressure tank is equipped with a third control valve.

[0011] The air blowing pipe is connected at one end to the ash discharge end of the dust collector and at the other end to an air source, and a fourth control valve is installed on the air blowing pipe.

[0012] The gas source is used to supply gas to the blowing pipe so that the powder discharged from the ash discharge end of the dust collector can enter the constant pressure tank through the recovery pipe, thereby realizing the discharge of powder from the dust collector.

[0013] Optionally, the dust removal device further includes:

[0014] A monitoring system is used to monitor the amount of dust collected in the dust collection tank and the pressure of the recovery pipeline and the constant pressure tank in real time.

[0015] The HMI interface allows operators to input work instructions and work parameters;

[0016] The data acquisition system is connected to the monitoring system and the HMI interface respectively. The data acquisition system is used to collect the storage signal of the dust removal tank and the pressure signal of the recovery pipeline and the constant pressure tank in real time, and to receive the operation instructions from the HMI interface.

[0017] The control system is connected to the data acquisition system, the first control valve, the second control valve, the third control valve, and the fourth control valve, respectively. The control system is used to receive the operation instructions of the data acquisition system, and to control the opening and closing of the first control valve, the second control valve, the third control valve, and the fourth control valve, as well as to adjust the opening degree of the second control valve.

[0018] Optionally, the monitoring system includes:

[0019] A pressure detector is installed on the dust collection tank and is used to monitor the amount of dust in the dust collection tank;

[0020] A first pressure gauge is installed on the recovery pipeline and is used to monitor the pressure of the recovery pipeline;

[0021] A second pressure gauge is installed on the constant pressure tank and is used to monitor the pressure of the constant pressure tank;

[0022] The pressure detector, the first pressure gauge, and the second pressure gauge are respectively connected to the data acquisition system.

[0023] Optionally, the dust collection tank includes a support base, support legs, and a storage tank. The ash gas separator is fixed to the top of the storage tank, and the ash discharge end of the ash gas separator is connected to the storage tank. The support legs are fixedly connected to the bottom of the storage tank. The pressure detector is disposed between the support legs and the support base and is used to monitor the storage capacity of the storage tank.

[0024] Optionally, two pressure detectors are provided, and the two pressure detectors are respectively fixed on the support base. Three support legs are provided, and the three support legs are arranged at 120° intervals. One of the support legs is hinged to the support base, and the other two support legs press on the corresponding pressure detectors, so that the two pressure detectors jointly monitor the storage capacity of the storage tank.

[0025] Optionally, the ash inlet end of the constant pressure tank is connected to a one-way valve, which is used to restrict the powder to enter the constant pressure tank only through the recovery pipe.

[0026] Secondly, the present invention provides a control method for a dust removal device, comprising the following steps:

[0027] S1, the control system controls the first control valve to open;

[0028] S2, the monitoring system monitors the dust collector's storage capacity W in real time. 除尘罐重量 The data acquisition system determines whether the real-time storage capacity of the dust collector has reached the set maximum weight.

[0029] S3, if the real-time storage capacity of the dust collector has not reached the set maximum weight, continue to execute S2. If the real-time storage capacity of the dust collector reaches the set maximum weight, the control system controls the third control valve, the fourth control valve, and the second control valve to open in sequence.

[0030] S4, the control system adjusts the opening degree of the second control valve;

[0031] S5, the monitoring system monitors the dust collector's storage capacity W in real time. 除尘罐重量 The data acquisition system determines whether the real-time storage capacity of the dust collector has reached the set minimum weight.

[0032] S6, if the real-time storage capacity of the dust collector has not reached the set minimum weight, continue to execute S5. If the real-time storage capacity of the dust collector has reached the set minimum weight, control the second control valve, the fourth control valve, and the third control valve to close sequentially through the control system.

[0033] S7 determines whether the dust removal operation is complete. If the dust removal operation is not complete, continue executing S1-S6 until the dust removal operation is finished.

[0034] Optionally, in S2, the stockpile detection value of one pressure detector is W1, the stockpile detection value of the other pressure detector is W2, and the stockpile in the dust collector is W. 除尘罐重量 =W1+W2.

[0035] Optionally, in S2, when the dust collector storage capacity W 除尘罐重量When the dust collector reaches 90% of its rated capacity, it is determined that the real-time capacity of the dust collector has reached the set maximum weight; otherwise, it is determined that the real-time capacity of the dust collector has not reached the set maximum weight.

[0036] Optionally, in S4, the data acquisition system compares the set dust collection volume and the actual dust collection volume, and adjusts the opening of the second control valve in real time through the control system, using the formula:

[0037]

[0038] Calculate the opening degree of the second control valve, where e(k) is the deviation between the set storage capacity and the actual storage capacity at the current time, e(k-1) is the deviation at time k-1, and K... p K i K d These are the proportional coefficient, integral coefficient, and differential coefficient, respectively.

[0039] Optionally, in S5, when the dust collector storage capacity W 除尘罐重量 When the dust collector reaches 10% of its rated capacity, it is determined that the real-time capacity of the dust collector has reached the set minimum weight; otherwise, it is determined that the real-time capacity of the dust collector has not reached the set minimum weight.

[0040] Optionally, in S6, after the second control valve is closed, the fourth and third control valves are closed sequentially after a 20-second delay to achieve backflushing of the recovery pipeline.

[0041] As can be seen from the above technical solution, the dust removal device and control method for offshore cementing equipment provided by the present invention have the following advantages:

[0042] This dust removal device overcomes the problem of limited dust collection tank volume. During long-term cementing operations, it can continuously and effectively collect and back-purge dust without interrupting the cementing operation, ensuring the timeliness of the cementing operation. At the same time, it can also effectively improve the problems of powder waste and environmental pollution.

[0043] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0044] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0045] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0046] Figure 2 This is a schematic diagram of the constant pressure tank in Embodiment 1 of the present invention;

[0047] Figure 3 This is a schematic diagram of the dust collector in Embodiment 1 of the present invention;

[0048] Figure 4 This is a flow control diagram of Embodiment 2 of the present invention.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Constant pressure tank; 2. Dust collector; 21. Support base; 22. Support leg; 23. Storage tank; 3. Ash-gas separator; 4. Exhaust pipe; 5. First control valve; 6. Recovery pipe; 7. Second control valve; 8. Third control valve; 9. Air blowing pipe; 10. Air source; 11. Fourth control valve; 12. Monitoring system; 121. Pressure detector; 122. First pressure gauge; 123. Second pressure gauge; 13. HMI interface; 14. Data acquisition system; 15. Control system; 16. Check valve. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be arbitrarily combined with each other.

[0052] Example 1

[0053] like Figure 1 , Figure 2 , Figure 3 The following is an embodiment of the present invention. This embodiment discloses a dust removal device suitable for offshore cementing equipment, including a constant pressure tank 1, a dust removal tank 2, and an ash-gas separator 3. The constant pressure tank 1 is used to connect the ash storage tank and the slurry mixing equipment, the dust removal tank 2 is used to collect powder, and the ash-gas separator 3 is used to separate the powder from the air.

[0054] In one embodiment, such as Figure 2 , Figure 3 As shown, the constant pressure tank 1 is provided with a feed inlet, a discharge outlet and an ash inlet at the top, and an exhaust outlet at the bottom. The dust collector 2 is provided with a feed inlet at the top and an ash discharge outlet at the bottom. The ash gas separator 3 is provided with a feed inlet in the middle, an exhaust outlet at the top and an ash discharge outlet at the bottom.

[0055] In one embodiment, such as Figure 1 , Figure 3 As shown, the ash-gas separator 3 is fixedly connected to the top of the dust collector 2, and the ash discharge end of the ash-gas separator 3 is connected to the feed end of the dust collector 2. When air containing powder enters the interior of the ash-gas separator 3 through the feed end, the powder enters the dust collector 2 through the ash discharge end of the ash-gas separator 3, and the air is discharged through the exhaust end of the ash-gas separator 3, thereby achieving dust removal.

[0056] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the exhaust end of the constant pressure tank 1 is connected to the feed end of the ash gas separator 3 through an exhaust pipe 4, so that the air containing powder in the constant pressure tank 1 can enter the ash gas separator 3 through the exhaust pipe 4. At the same time, the exhaust end of the constant pressure tank 1 is equipped with a first control valve 5.

[0057] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the ash discharge end of the dust collector 2 is connected to the ash inlet end of the constant pressure tank 1 via a recovery pipe 6. When the dust collector 2 is full of powder, the powder can enter the constant pressure tank 1 through the recovery pipe 6, thereby emptying the powder in the dust collector 2 and enabling the dust collector 2 to continuously perform dust removal operations. Simultaneously, a second control valve 7 is installed at the ash discharge end of the dust collector 2, and a third control valve 8 is installed at the ash inlet end of the constant pressure tank 1.

[0058] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the dust removal tank 2 is connected to an air blowing pipe 9 at the ash discharge end, and an air source 10 is connected to the end of the air blowing pipe 9, thereby providing power for the flow of powder, so that the powder can smoothly pass through the recovery pipe 6 into the constant pressure tank 1. At the same time, a fourth control valve 11 is installed on the air blowing pipe 9.

[0059] When the powder in the dust collector 2 is full or reaches the set weight, the third control valve 8, the fourth control valve 11, and the second control valve 7 are opened in sequence, and the air source 10 is started. At this time, the powder in the dust collector 2 enters the constant pressure tank 1 through the recovery pipe 6, thereby realizing the emptying of the powder in the dust collector 2 so that the dust collector 2 can continuously carry out dust removal operations.

[0060] The dust removal device for offshore cementing equipment in this embodiment overcomes the problem of limited volume of the dust removal tank 2. During long-term cementing operations, it can continuously and effectively remove dust, collect dust, and backflush without interrupting the cementing operation, ensuring the timeliness of the cementing operation. At the same time, it can also effectively improve the problems of powder waste and environmental pollution.

[0061] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the dust removal device also includes a monitoring system 12, an HMI interface 13, a data acquisition system 14, and a control system 15. The monitoring system 12 is used to monitor the amount of dust in the dust removal tank 2 and the pressure of the recovery pipeline 6 and the constant pressure tank 1 in real time. The HMI interface 13 is used for operators to input operation instructions and operation parameters.

[0062] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the data acquisition system 14 is connected to the monitoring system 12 and the HMI interface 13 respectively. The data acquisition system 14 is used to collect the storage signal of the dust removal tank 2 and the pressure signal of the recovery pipeline 6 and the constant pressure tank 1 in real time, and to receive the operation instructions from the HMI interface 13.

[0063] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the control system 15 is connected to the data acquisition system 14, the first control valve 5, the second control valve 7, the third control valve 8, and the fourth control valve 11, respectively. The control system 15 is used to receive the operation instructions from the data acquisition system 14 and to control the opening and closing of the first control valve 5, the second control valve 7, the third control valve 8, and the fourth control valve 11, as well as to adjust the opening degree of the second control valve 7. In this embodiment, the control system 15 uses a PLC as the controller to perform logic control and closed-loop regulation on all control valves and the data acquisition system 14.

[0064] In one embodiment, such as Figure 2 , Figure 3 As shown, the monitoring system 12 includes a pressure detector 121, a first pressure gauge 122, and a second pressure gauge 123. The pressure detector 121 is installed on the dust collection tank 2 and is used to monitor the stock level in the dust collection tank 2. The first pressure gauge 122 is installed on the recovery pipe 6 and is used to monitor the internal pressure of the recovery pipe 6. The second pressure gauge 123 is installed on the constant pressure tank 1 and is used to monitor the internal pressure of the constant pressure tank 1. Simultaneously, the pressure detector 121, the first pressure gauge 122, and the second pressure gauge 123 are connected to the data acquisition system 14, enabling the data acquisition system 14 to acquire stock level and pressure signals in real time.

[0065] In one embodiment, such as Figure 1 , Figure 3 As shown, the dust collector 2 includes a support base 21, support legs 22, and a storage tank 23. A dust-gas separator 3 is fixed to the top of the storage tank 23, and the ash discharge end of the dust-gas separator 3 is connected to the feed end at the top of the storage tank 23 to allow powder to enter the storage tank 23. The support legs 22 are fixedly connected to the bottom of the storage tank 23, and a pressure detector 121 is located between the support legs 22 and the support base 21 to monitor the storage level in the storage tank 23.

[0066] In one embodiment, such as Figure 1 , Figure 3As shown, there are two pressure detectors 121, and the two pressure detectors 121 are fixed on the support base 21 respectively. There are three support legs 22, which are arranged at 120° intervals. One support leg 22 is hinged to the support base 21, and the other two support legs 22 press on the corresponding pressure detectors 121 respectively, so that the two pressure detectors 121 jointly monitor the amount of powder in the storage tank 23. That is, the sum of the measurements of the two pressure detectors 121 is the weight of the powder in the storage tank 23.

[0067] In one embodiment, such as Figure 1 , Figure 2 As shown, a one-way valve 16 is connected to the ash inlet end of the constant pressure tank 1. The one-way valve 16 is used to restrict the powder to enter the constant pressure tank 1 only through the recovery pipe 6. In this embodiment, the one-way valve 16 is a three-lobe type and is installed vertically at the ash inlet end of the constant pressure tank 1, which effectively improves the throughput of the ash-gas mixture and reduces the risk of blockage in the recovery pipe 6.

[0068] As can be seen from the above process, the use of this dust removal device has the following advantages:

[0069] (1) It overcomes the problem of limited capacity of existing dust collection tanks, and can realize the automatic control capability of continuous dust collection and continuous back-blowing, thus improving the problems of powder waste and environmental pollution;

[0070] (2) When the dust collector is full of powder, the powder in the dust collector can be automatically discharged to the constant pressure tank, thereby realizing the automatic dust removal and emptying of the dust collector, which greatly reduces the labor intensity of the operators.

[0071] (3) The dust removal device can operate without interruption during long-term cementing operations in deep wells, and can also continuously and effectively remove and collect dust, and has continuous back-blowing capability to ensure the timeliness of cementing operations;

[0072] (4) The pressure of the recovery pipeline and the constant pressure tank is monitored by the first pressure gauge and the second pressure gauge, which makes it easier for staff to quickly determine whether the recovery pipeline is blocked or whether the one-way valve is normal, thereby improving the convenience of use.

[0073] Example 2

[0074] like Figure 4 The following is an embodiment 2 of the present invention, which discloses a method for using a dust removal device, including the following steps:

[0075] S1, Input the work command and corresponding work parameters into the HMI interface 13. At this time, the control system 15 receives the work command and controls the first control valve 5 to open.

[0076] S2, Monitoring System 12 monitors the dust collector 2's storage capacity W in real time. 除尘罐重量The data acquisition system 14 determines whether the real-time storage capacity of the dust collector 2 has reached the set maximum weight.

[0077] S3, if the real-time storage capacity of dust collector 2 has not reached the set maximum weight, continue to execute S2. If the real-time storage capacity of dust collector 2 reaches the set maximum weight, the control system 15 controls the third control valve 8, the fourth control valve 11, and the second control valve 7 to open in sequence.

[0078] S4, the control system 15 adjusts the opening degree of the second control valve 7;

[0079] S5, Monitoring System 12 monitors the dust collector 2's storage capacity W in real time. 除尘罐重量 The data acquisition system 14 determines whether the real-time storage capacity of the dust collector 2 has reached the set minimum weight.

[0080] S6, if the real-time storage volume of dust collector 2 does not reach the set minimum weight, continue to execute S5. If the real-time storage volume of dust collector 2 reaches the set minimum weight, control system 15 controls the second control valve 7, the fourth control valve 11, and the third control valve 8 to close in sequence.

[0081] S7 determines whether the dust removal operation is complete. If the dust removal operation is not complete, continue executing S1-S6 until the dust removal operation is finished.

[0082] In S2, the storage volume detection value of one pressure detector 121 is W1, the storage volume detection value of the other pressure detector 121 is W2, and the storage volume of dust collector 2 is W. 除尘罐重量 =W1+W2.

[0083] In S2, when the real-time storage capacity W of dust collector 2... 除尘罐重量 When the real-time storage capacity of dust collector 2 reaches 90% of its rated capacity, it is determined that the real-time storage capacity of dust collector 2 has reached the set maximum weight; otherwise, it is determined that the real-time storage capacity of dust collector 2 has not reached the set maximum weight.

[0084] In S4, the data acquisition system 14 compares the set storage capacity and the actual storage capacity of the dust collector 2, and adjusts the opening degree of the second control valve 7 in real time through the control system 15, using the formula:

[0085]

[0086] Calculate the opening degree of the second control valve 7, where e(k) is the deviation between the set storage capacity and the actual storage capacity at the current time, e(k-1) is the deviation at time k-1, and K... p K i K d These are the proportional coefficient, integral coefficient, and differential coefficient, respectively.

[0087] In S5, when the real-time storage capacity W of dust collector 2... 除尘罐重量When the real-time storage capacity of dust collector 2 reaches 10% of its rated storage capacity, it is determined that the real-time storage capacity of dust collector 2 has reached the set minimum weight; otherwise, it is determined that the real-time storage capacity of dust collector 2 has not reached the set minimum weight.

[0088] In S6, after the second control valve 7 is closed, the fourth control valve 11 and the third control valve 8 are closed sequentially after a 20-second delay to achieve backflushing of the recovery pipeline 6.

[0089] The operation process of the dust removal device in this embodiment is as follows:

[0090] When the control system receives the operation command and opens the first control valve, the air containing powder in the constant pressure tank enters the ash-gas separator through the exhaust pipe. Subsequently, the powder enters the dust collector, and the clean air is discharged through the exhaust end of the ash-gas separator. At the same time, two pressure detectors jointly monitor the dust level in the dust collector and transmit the level signal to the data acquisition system in real time.

[0091] When the two pressure detectors detect that the dust collection tank has reached 90% of its rated capacity, the data acquisition system sends an operation command to the control system. The control system then sequentially opens the third, fourth, and second control valves. At this point, under the influence of the air supply, the powder in the dust collection tank enters the constant pressure tank through the recovery pipeline. Simultaneously, the data acquisition system collects the dust collection volume signal in real time and sends an operation command to the control system, causing the control system to adjust the opening of the second control valve in real time.

[0092] When the two pressure detectors detect that the dust collector's content has decreased to 10% of the rated content, the data acquisition system sends an operation command to the control system. At this time, the control system first closes the second control valve, and after a 20-second delay, it then controls the fourth and third control valves to close sequentially. This process repeats until the dust collector's content reaches 90% of the rated content, at which point the dust is automatically discharged into the constant pressure tank, thus achieving automated emptying of the dust collector's contents.

[0093] It should be noted that, unless otherwise stated, the technical or scientific terms used in this invention should have the ordinary meaning as understood by one of ordinary skill in the art.

[0094] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A control method for a dust removal device suitable for offshore cementing equipment, characterized in that, The dust removal device includes: A constant pressure tank (1) is used to connect the ash storage tank and the slurry mixing equipment; Dust collection tank (2), used to collect powder; A dust separator (3) is installed on the top of the dust collector (2), and the dust discharge end of the dust separator (3) is connected to the dust collector (2). The exhaust pipe (4) is connected at one end to the exhaust end of the constant pressure tank (1) and at the other end to the feed end of the ash gas separator (3), and the exhaust end of the constant pressure tank (1) is provided with a first control valve (5). The recycling pipe (6) is connected at one end to the ash discharge end of the dust collector (2) and at the other end to the ash inlet end of the constant pressure tank (1). The ash discharge end of the dust collector (2) is equipped with a second control valve (7), and the ash inlet end of the constant pressure tank (1) is equipped with a third control valve (8). An air blowing pipe (9) is connected at one end to the ash discharge end of the dust collector (2) and at the other end to an air source (10). A fourth control valve (11) is provided on the air blowing pipe (9). The gas source (10) is used to supply gas to the blowing pipe (9) so that the powder discharged from the ash discharge end of the dust collector (2) can enter the constant pressure tank (1) through the recovery pipe (6), thereby realizing the discharge of powder in the dust collector (2); The dust removal device also includes: The monitoring system (12) is used to monitor the amount of dust in the dust removal tank (2) and the pressure of the recovery pipeline (6) and the constant pressure tank (1) in real time; The HMI interface (13) is used by operators to input work instructions and work parameters; The data acquisition system (14) is connected to the monitoring system (12) and the HMI interface (13) respectively. The data acquisition system (14) is used to collect the storage signal of the dust removal tank (2) and the pressure signal of the recovery pipeline (6) and the constant pressure tank (1) in real time, and to receive the operation instructions from the HMI interface (13). The control system (15) is connected to the data acquisition system (14), the first control valve (5), the second control valve (7), the third control valve (8), and the fourth control valve (11) respectively. The control system (15) is used to receive the operation instructions of the data acquisition system (14), and to control the opening and closing of the first control valve (5), the second control valve (7), the third control valve (8), and the fourth control valve (11), and to adjust the opening degree of the second control valve (7). The control method includes the following steps: S1, the control system (15) controls the first control valve (5) to open; S2, the monitoring system (12) monitors the dust collector (2) storage capacity W in real time. 除尘罐重量 The data acquisition system (14) determines whether the real-time storage capacity of the dust collector (2) has reached the set maximum weight. S3, if the real-time storage capacity of the dust collector (2) does not reach the set maximum weight, continue to execute S2. If the real-time storage capacity of the dust collector (2) reaches the set maximum weight, the control system (15) controls the third control valve (8), the fourth control valve (11), and the second control valve (7) to open in sequence. S4, the control system (15) adjusts the opening degree of the second control valve (7); S5, the monitoring system (12) monitors the dust collector (2) storage capacity W in real time. 除尘罐重量 The data acquisition system (14) determines whether the real-time storage capacity of the dust collector (2) has reached the set minimum weight. S6, if the real-time storage volume of the dust collector (2) does not reach the set minimum weight, continue to execute S5. If the real-time storage volume of the dust collector (2) reaches the set minimum weight, control the second control valve (7), the fourth control valve (11), and the third control valve (8) to close in sequence through the control system (15). S7 determines whether the dust removal operation is complete. If the dust removal operation is not complete, continue executing S1-S6 until the dust removal operation is finished.

2. The control method according to claim 1, characterized in that, In S2, the storage volume detection value of one pressure detector (121) is W1, the storage volume detection value of the other pressure detector (121) is W2, and the storage volume of the dust collector (2) is W. 除尘罐重量 =W1+W2.

3. The control method according to claim 1, characterized in that, In S2, when the dust collector (2) contains W 除尘罐重量 When the real-time storage capacity of the dust collector (2) reaches 90% of its rated storage capacity, it is determined that the real-time storage capacity of the dust collector (2) has reached the set maximum weight; otherwise, it is determined that the real-time storage capacity of the dust collector (2) has not reached the set maximum weight.

4. The control method according to claim 1, characterized in that, In S5, when the dust collector (2) has a storage capacity of W 除尘罐重量 When the real-time storage capacity of the dust collector (2) reaches 10% of the rated storage capacity, it is determined that the real-time storage capacity of the dust collector (2) has reached the set minimum weight; otherwise, it is determined that the real-time storage capacity of the dust collector (2) has not reached the set minimum weight.

5. The control method according to claim 1, characterized in that, In S6, after the second control valve (7) is closed, the fourth control valve (11) and the third control valve (8) are closed sequentially after a 20-second delay to achieve backflushing of the recovery pipeline (6).

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