High manganese steel welding dust removal device based on dynamic concentration regulation and control and operation method of high manganese steel welding dust removal device

Abstract

The invention discloses a high-manganese steel welding dust removal device based on dynamic concentration regulation and an operation method thereof, and relates to the technical field of high-manganese steel welding dust removal, the high-manganese steel welding dust removal device comprises a dust removal box and a transmission cleaning assembly, the end of the dust removal box is connected with an air inlet pipe, and the end of the air inlet pipe is connected with an electrostatic dust removal chamber; the transmission cleaning assembly is connected to the bottom of the induced draft fan, one side of the electrostatic dust collection chamber is connected with a spraying chamber, the end of a spraying pipe is connected with a flow control valve, and concentration sensors are arranged on the surface of an exhaust pipe on the side face of the spraying chamber and the side face of an air inlet pipe. According to the high manganese steel welding dust removal device based on dynamic concentration regulation and control and the operation method thereof, by monitoring the concentration of welding smoke dust and manganese steam in real time and dynamically adjusting the rotating speed of an induced draft fan, the flow of spraying liquid and the power of a motor, it is ensured that the device can efficiently remove pollutants under the high-concentration working condition, and the dust removal requirement under the maximum smoke dust amount is met; meanwhile, resource utilization is optimized, energy consumption is reduced, and environmental protection performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high manganese steel welding dust removal, and particularly to a high manganese steel welding dust removal device based on dynamic concentration regulation and its operation method. Background Art

[0002] Due to its excellent wear resistance and impact resistance, high manganese steel is widely used in mining machinery, construction machinery and the railway industry, and is particularly suitable for harsh working conditions such as low temperature and high impact. After welding, the surface strength of high manganese steel can be further enhanced and its service life can be extended due to its self-hardening characteristics. However, during the welding process of high manganese steel, a large amount of high-concentration dust and highly toxic manganese vapor are generated. These pollutants not only seriously pollute the welding operation environment, but also pose a great threat to the physical health of on-site operators.

[0003] At present, most of the welding dust removal devices on the market are designed with fixed parameters and are mainly aimed at the welding conditions of ordinary steel. For the large amount of dust emissions and relatively high-toxic manganese vapor unique to the welding process of high manganese steel, existing devices often cannot effectively cope with them. In addition, due to the dynamic change characteristics of the dust and manganese vapor concentration during the welding process of high manganese steel, traditional fixed dust removal equipment lacks real-time monitoring and dynamic regulation capabilities, making it difficult to ensure the dust removal effect, and there are problems such as low dust removal efficiency, insufficient personal protection and waste of resources.

[0004] Therefore, it is urgent to develop a highly efficient welding dust removal device specifically for the welding process of high manganese steel that can achieve dynamic monitoring and real-time regulation of dust and toxic gases, so as to effectively reduce the pollution of the operation environment and ensure the physical health and safety of operators. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a high manganese steel welding dust removal device based on dynamic concentration regulation and its operation method, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A high manganese steel welding dust removal device based on dynamic concentration regulation includes a dust removal box and a transmission cleaning component. An air inlet pipe is connected to the end of the dust removal box, and an induced draft fan is arranged inside the air inlet pipe. The end of the air inlet pipe is connected to an electrostatic dust removal chamber, and dust removal plates are distributed on one side inside the electrostatic dust removal chamber. The transmission cleaning component is connected to the bottom of the induced draft fan. One side of the electrostatic dust removal chamber is connected to a spray chamber, and a spray pipe is connected to the top of the spray chamber. The end of the spray pipe is connected to a flow control valve, and a variable frequency motor is connected to the upper surface of the induced draft fan. Concentration sensors are arranged on the surfaces of the exhaust pipe on the side of the spray chamber and the air inlet pipe on the side, and a waste liquid recovery pipeline is connected to the bottom of the spray chamber.

[0007] Further, the transmission and cleaning assembly includes a transmission lead screw and a bevel gear set. The bevel gear set is arranged at the bottom of the transmission lead screw and is disposed inside the dust-proof box.

[0008] Further, the transmission and cleaning assembly further includes a reciprocating lead screw. The side of the bevel gear set is connected to the reciprocating lead screw, and the length of the reciprocating lead screw is adapted to the length of the dust removal sheet.

[0009] Further, the transmission and cleaning assembly further includes a moving base. A moving base is sleeved on the outer wall of the transmission lead screw. Both ends of the moving base are rotatably connected to corrugated sleeves, and the corrugated sleeves are sleeved outside the reciprocating lead screw.

[0010] Further, the transmission and cleaning assembly further includes an air extraction rod frame. The end of the moving base is fixed with an air extraction rod frame.

[0011] Further, the transmission and cleaning assembly further includes a dust removal head. The side of the air extraction rod frame is connected to the dust removal head through a branch pipe.

[0012] Further, the dust removal head is wrapped on the surface of the dust removal sheet, and the dust removal head and the dust removal sheet are arranged in a one-to-one manner.

[0013] Further, the transmission and cleaning assembly further includes an air extraction pipe, a dust collection chamber, a dust filter net and an air extraction pump. The bottom of the air extraction rod frame is connected to the air extraction pipe, and the end of the air extraction pipe is connected to the dust collection chamber. A dust filter net is arranged on one side inside the dust collection chamber, and an air extraction pump is connected to one side of the dust collection chamber.

[0014] Further, the exhaust end of the air extraction pump is connected to the inside of the electrostatic dust removal chamber through a pipe, and the position of the exhaust end of the air extraction pump is located on the left side of the dust removal sheet.

[0015] An operation method is applied to the above-mentioned high manganese steel welding dust removal device based on dynamic concentration regulation. The operation method includes the following steps:

[0016] Step 1: During the welding process, welding fumes and manganese vapor pass through the electrostatic dust removal chamber and the spray chamber in sequence from the intake pipe. The electrostatic dust removal chamber is used to capture fine particles in the welding fumes. The spray chamber further removes manganese vapor, manganese oxides and residual gases by spraying an adsorption liquid. The waste liquid generated by spraying is discharged from the waste liquid recovery pipe, and the treated gas is discharged from the exhaust pipe on the side of the spray chamber;

[0017] Among them, the inlet concentration C in and the outlet concentration C out of welding fumes and manganese vapor during the welding process are monitored in real time by a concentration sensor, and the concentration data is transmitted to the system background;

[0018] Step 2: The system background dynamically calculates the concentration difference ΔC = Cin -C out and the concentration error coefficient E c , dynamically calculate the rotational speed of the induced draft fan and the flow rate of the spray liquid, and the concentration difference formula ΔC: ΔC = C in -C out In, C in is the inlet concentration of welding fume or manganese vapor, and C out is the outlet concentration after treatment; the difference between the inlet and outlet concentrations characterizes the actual removal capacity of the device;

[0019] Concentration error coefficient, which is used to quantify the deviation of the removal effect:

[0020]

[0021] C target Target outlet concentration;

[0022] C out Actual outlet concentration;

[0023] Rotational speed regulation formula for the induced draft fan (3):

[0024]

[0025] N f : Current rotational speed of the induced draft fan;

[0026] N min : Minimum allowable rotational speed of the induced draft fan to prevent the fan speed from being too low to meet the basic dust removal requirements;

[0027] N max : Maximum allowable rotational speed of the induced draft fan to limit the maximum fan speed and avoid energy consumption waste and equipment overload;

[0028] N f0 : Basic rotational speed of the induced draft fan, that is, the normal rotational speed during initial operation;

[0029] represents the outlet concentration ratio, the ratio of the outlet concentration to the inlet concentration, which reflects the real-time dust removal effect. The higher the ratio, the worse the dust removal effect and the higher the rotational speed required;

[0030] E c : Concentration error coefficient, a correction term for the deviation between the real-time dust removal effect and the target. The greater the error, the higher the rotational speed will be accordingly;

[0031] C max : Maximum inlet concentration generated during high manganese steel welding, with a design value of 80 mg / m 3; K1, K2, K3: The weight coefficients are adjustable. K1: Generally take values from 0.1 to 0.3 to adjust the sensitivity of the ratio of outlet concentration to inlet concentration to the rotational speed. K2: Generally take values from 0.1 to 0.3 to adjust the response strength when the actual dust removal effect deviates from the target. K3: Generally take values from 0.2 to 0.4 to adjust the response strength of the fan when the inlet concentration approaches the design maximum value;

[0032] Spray flow rate regulation formula:

[0033]

[0034] Q p : The current spray liquid flow rate;

[0035] Q p0 : The basic spray liquid flow rate;

[0036] K4: Controls the influence of the ratio of outlet concentration to inlet concentration on the flow rate, and the recommended value range is 0.1 - 0.3;

[0037] K5: Controls the influence of the error coefficient on the flow rate, and the recommended value range is 0.1 - 0.3;

[0038] Step 3: Based on the calculation results of the induced fan rotational speed formula and the spray flow rate regulation formula, the system background controls the variable-frequency motor and the flow control valve in real time to adjust the spray liquid flow rate and the induced fan rotational speed.

[0039] The present invention provides a high manganese steel welding dust removal device based on dynamic concentration regulation and its operation method, having the following beneficial effects:

[0040] 1. The high manganese steel welding dust removal device based on dynamic concentration regulation and its operation method, by real-time monitoring the concentrations of welding fume and manganese vapor, dynamically adjust the rotational speed of the induced fan, the spray liquid flow rate and the motor power, ensure that the device can efficiently remove pollutants under high-concentration working conditions, meet the dust removal requirements under the maximum dust volume, while optimizing resource utilization, reducing energy consumption and enhancing environmental protection performance.

[0041] 2. The high manganese steel welding dust removal device based on dynamic concentration regulation and its operation method, utilize the rotation of the induced fan to drive the moving base to slide back and forth on the surface of the dust removal sheet through the transmission of the transmission screw rod, the bevel gear set and the reciprocating screw rod, and continuously suck the dust adsorbed on the surface of the dust removal sheet by the electrostatic adsorption technology through the negative air pressure generated by the air extraction pump, so that the dust on the surface of the dust removal sheet is always difficult to accumulate, thus always maintaining the adsorption effect of the dust removal sheet, and when the reciprocating screw rod rotates inside the electrostatic dust removal chamber, during the reciprocating movement of the moving base, the corrugated sleeve stretches accordingly, and since the corrugated sleeve is always sleeved outside the reciprocating screw rod, it prevents the reciprocating screw rod from being exposed and the dust in the flue gas from adhering to its surface and affecting the movement of the moving base. Brief Description of the Drawings

[0042] Figure 1 It is a schematic internal structure diagram of the dust removal box of a dust removal device for high manganese steel welding based on dynamic concentration regulation according to the present invention;

[0043] Figure 2 It is a schematic external structure diagram of the dust removal box of a dust removal device for high manganese steel welding based on dynamic concentration regulation according to the present invention;

[0044] Figure 3 It is a schematic internal structure diagram of the electrostatic dust removal chamber of a dust removal device for high manganese steel welding based on dynamic concentration regulation according to the present invention;

[0045] Figure 4 It is a schematic internal structure diagram of the spray chamber of a dust removal device for high manganese steel welding based on dynamic concentration regulation according to the present invention;

[0046] Figure 5 It is a schematic side structure diagram of the bevel gear set of a dust removal device for high manganese steel welding based on dynamic concentration regulation according to the present invention.

[0047] In the figure: 1. Dust removal box; 2. Air inlet pipe; 3. Induced draft fan; 4. Electrostatic dust removal chamber; 5. Dust removal sheet; 6. Transmission cleaning assembly; 601. Transmission lead screw; 602. Bevel gear set; 603. Reciprocating lead screw; 604. Moving base; 605. Air extraction rod frame; 606. Dust removal head; 607. Air extraction pipe; 608. Dust collection chamber; 609. Dust filter net; 610. Air extraction pump; 7. Spray chamber; 8. Spray pipe; 9. Concentration sensor; 10. Waste liquid recovery pipeline; 11. Corrugated sleeve. Detailed Embodiment

[0048] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0049] Such as Figures 1-5As shown in the figure, the present invention provides a technical solution: a dust removal device for high manganese steel welding based on dynamic concentration regulation, which includes a dust removal box 1 and a transmission cleaning component 6. An air inlet pipe 2 is connected to the end of the dust removal box 1, and an induced draft fan 3 is arranged inside the air inlet pipe 2. The end of the air inlet pipe 2 is connected to an electrostatic dust removal chamber 4, and dust removal sheets 5 are distributed on one side inside the electrostatic dust removal chamber 4. The transmission cleaning component 6 is connected to the bottom of the induced draft fan 3. One side of the electrostatic dust removal chamber 4 is connected to a spray chamber 7, and a spray pipe 8 is connected to the top of the spray chamber 7. The end of the spray pipe 8 is connected to a flow control valve. The upper surface of the induced draft fan 3 is connected to a variable frequency motor. Concentration sensors 9 are arranged on the surfaces of the exhaust pipe on the side of the spray chamber 7 and the air inlet pipe 2 on the side, and a waste liquid recovery pipe 10 is connected to the bottom of the spray chamber 7. The transmission cleaning component 6 includes a transmission lead screw 601 and a bevel gear set 602. The bevel gear set 602 is arranged at the bottom of the transmission lead screw 601 and is arranged inside a dust-proof box. The transmission cleaning component 6 further includes a reciprocating lead screw 603. The side of the bevel gear set 602 is connected to the reciprocating lead screw 603, and the length of the reciprocating lead screw 603 is adapted to the length of the dust removal sheet 5. The transmission cleaning component 6 further includes a moving base 604. A moving base 604 is sleeved on the outer wall of the transmission lead screw 601. Corrugated sleeves 11 are rotatably connected to both ends of the moving base 604, and the corrugated sleeves 11 are sleeved on the outside of the reciprocating lead screw 603. The transmission cleaning component 6 further includes an air extraction rod frame 605. The air extraction rod frame 605 is fixed to the end of the moving base 604. The transmission cleaning component 6 further includes a dust removal head 606. The side of the air extraction rod frame 605 is connected to the dust removal head 606 through a branch pipe. The dust removal head 606 wraps the surface of the dust removal sheet 5, and the dust removal head 606 and the dust removal sheet 5 are arranged in a one-to-one manner. The transmission cleaning component 6 further includes an air extraction pipe 607, a dust collection chamber 608, a dust filter net 609 and an air extraction pump 610. The bottom of the air extraction rod frame 605 is connected to the air extraction pipe 607, and the end of the air extraction pipe 607 is connected to the dust collection chamber 608. A dust filter net 609 is arranged on one side inside the dust collection chamber 608, and one side of the dust collection chamber 608 is connected to the air extraction pump 610. The exhaust end of the air extraction pump 610 is connected to the inside of the electrostatic dust removal chamber 4 through a pipe, and the position of the exhaust end of the air extraction pump 610 is located on the left side of the dust removal sheet 5;

[0050] The specific operation is as follows. The fumes generated by welding are guided by the induced draft fan 3 and enter the interior of the electrostatic dust removal chamber 4 through the intake pipe 2. During the process of the fumes passing through the electrostatic dust removal chamber 4 and entering the interior of the spray chamber 7, the dust in the fumes is adsorbed by the dust removal sheet 5. As more and more dust is adsorbed on the surface of the dust removal sheet 5, the dust accumulates on its surface, thus affecting the adsorption effect. To solve this problem, the present invention uses the rotation of the induced draft fan 3 to drive the rotation of the transmission lead screw 601, and the transmission lead screw 601 drives the reciprocating lead screw 603 to rotate through the bevel gear set 602, so that the moving base 604 slides back and forth along the surface of the reciprocating lead screw 603. Thus, the dust removal head 606 is carried by the air extraction rod holder 605 and slides back and forth on the surface of the dust removal sheet 5. At the same time, the air extraction pump 610 is started to generate a negative air pressure at the dust removal head 606 to suck the dust on the surface of the dust removal sheet 5. After the dust is sucked, it enters the dust collection chamber 608 along the air extraction rod holder 605 and the air extraction pipe 607. The dust is isolated by the dust filter net 609, and the gas passes through the dust filter net 609 and is discharged back into the interior of the electrostatic dust removal chamber 4 from the exhaust end of the air extraction pump 610. And during the reciprocating movement of the moving base 604, the corrugated sleeve 11 stretches accordingly. Since the corrugated sleeve 11 is always sleeved outside the reciprocating lead screw 603, the reciprocating lead screw 603 is prevented from being exposed, so that the dust in the fumes adheres to its surface and affects the movement of the moving base 604;

[0051] Based on the above description, the present invention uses the rotation of the induced draft fan 3 to drive the reciprocating movement of the dust removal head 606 carried by the moving base 604 on the surface of the dust removal sheet 5 through the transmission of the transmission lead screw 601, the bevel gear set 602, and the reciprocating lead screw 603, and uses the negative air pressure generated by the air extraction pump 610 to continuously suck the dust adsorbed on the surface of the dust removal sheet 5 by the electrostatic adsorption technology, so that the dust on the surface of the dust removal sheet 5 is always difficult to accumulate, thus always maintaining the adsorption effect of the dust removal sheet 5. And when the reciprocating lead screw 603 rotates inside the electrostatic dust removal chamber 4, during the reciprocating movement of the moving base 604, the corrugated sleeve 11 stretches accordingly. Since the corrugated sleeve 11 is always sleeved outside the reciprocating lead screw 603, the reciprocating lead screw 603 is prevented from being exposed, so that the dust in the fumes adheres to its surface and affects the movement of the moving base 604.

[0052] An operation method is applied to the above-mentioned high manganese steel welding dust removal device based on dynamic concentration regulation. The operation method includes the following steps:

[0053] Step 1: During the welding process, the welding fumes and manganese vapor pass through the electrostatic dust removal chamber 4 and the spray chamber 7 in sequence through the intake pipe 2. The electrostatic dust removal chamber 4 is used to capture the fine particles in the welding fumes. The spray chamber 7 further removes the manganese vapor, manganese oxides and residual gases by spraying the adsorption liquid. The waste liquid generated by spraying is discharged from the waste liquid recovery pipe 10, and the treated gas is discharged from the exhaust pipe on the side of the spray chamber 7;

[0054] Among them, the inlet concentration C of dust and manganese vapor during the welding process is monitored in real time by the concentration sensor 9 in and the outlet concentration C out , and the concentration data is transmitted to the system background;

[0055] Step 2: The system background dynamically calculates the concentration difference ΔC = C in - C out and the concentration error coefficient E c , dynamically calculates the rotational speed of the induced draft fan 3 and the flow rate of the spray liquid, and the concentration difference formula ΔC: ΔC = C in - C out In the formula, C in is the inlet concentration of welding dust or manganese vapor, and C out is the outlet concentration after treatment; the difference between the inlet and outlet concentrations represents the actual removal ability of the device;

[0056] Concentration error coefficient, which is used to quantify the deviation of the removal effect:

[0057]

[0058] C target Target outlet concentration;

[0059] C out Actual outlet concentration;

[0060] Rotational speed regulation formula of the induced draft fan (3):

[0061]

[0062] N f : Current rotational speed of the induced draft fan (3);

[0063] N min : Minimum allowable rotational speed of the induced draft fan, to prevent the fan rotational speed from being too low to meet the basic dust removal requirements;

[0064] N max : Maximum allowable rotational speed of the induced draft fan, to limit the maximum rotational speed of the fan and avoid energy consumption waste and equipment overload;

[0065] N f0 : Basic rotational speed of the induced draft fan (3), that is, the normal rotational speed during initial operation;

[0066] Represents the outlet concentration ratio, the ratio of the outlet concentration to the inlet concentration, which reflects the real-time dust removal effect. The higher the ratio, the worse the dust removal effect, and the higher the rotational speed needs to be increased;

[0067] E c : Concentration error coefficient, a correction term for the deviation between the real-time dust removal effect and the target. The greater the error, the higher the rotational speed will be correspondingly;

[0068] C max : The maximum inlet concentration generated during the welding of high manganese steel, with a design value of 80 mg / m 3 ; K1, K2, K3: The weight coefficients are adjustable. K1: Generally takes values from 0.1 to 0.3 to adjust the sensitivity of the ratio of the outlet concentration to the inlet concentration to the rotational speed. K2: Generally takes values from 0.1 to 0.3 to adjust the response strength when the actual dust removal effect deviates from the target. K3: Generally takes values from 0.2 to 0.4 to adjust the response strength of the fan when the inlet concentration approaches the design maximum value;

[0069] Spray flow rate regulation formula:

[0070]

[0071] Q p : The current spray liquid flow rate;

[0072] Q p0 : The basic spray liquid flow rate;

[0073] K4: Controls the influence of the ratio of the outlet concentration to the inlet concentration on the flow rate, and the recommended value range is 0.1 - 0.3;

[0074] K5: Controls the influence of the error coefficient on the flow rate, and the recommended value range is 0.1 - 0.3;

[0075] Step 3: Based on the calculation results of the rotational speed formula of the induced draft fan 3 and the spray flow rate regulation formula, the system background controls the frequency conversion motor and the flow control valve in real time to adjust the spray liquid flow rate and the rotational speed of the induced draft fan 3;

[0076] The specific operation is as follows. During the welding process, the welding fume and manganese vapor pass through the electrostatic dust removal chamber 4 and the spray chamber 7 in sequence from the intake pipe 2. The electrostatic dust removal chamber 4 is used to capture the fine particles in the welding fume. The spray chamber 7 further removes the manganese vapor, manganese oxides and residual gas through spraying the adsorption liquid. The waste liquid generated by spraying is discharged from the waste liquid recovery pipe 10, and the treated gas is discharged from the exhaust pipe on the side of the spray chamber 7. Among them, the inlet concentration C in and the outlet concentration C out of the welding fume and manganese vapor during the welding process are monitored in real time by the concentration sensor 9, and the concentration data is transmitted to the system background;

[0077] This dust removal device is designed according to the maximum dust emission rate of 6 g / min and the inlet concentration of 80 mg / m 3 to ensure that the device can achieve efficient dust removal under extreme working conditions. Laser sensors are also installed inside the spray chamber 7 and the electrostatic dust removal chamber 4 to monitor the changes in the concentration of welding fume and manganese vapor in real time, and support continuous data collection and wireless transmission;

[0078] The system dynamically calculates the concentration difference ΔC = C in - C out and the concentration error coefficient E c . The error correction term E c is used to correct the concentration error. When the error is large (i.e., the removal effect is poor), the rotation speed of the induced draft fan 3 will increase to enhance the adsorption capacity. When the error approaches 0, the induced draft fan 3 operates in the normal state. The specific calculation process is as follows:

[0079] Concentration difference formula ΔC: ΔC = C in - C out

[0080] where C in is the inlet concentration of welding fume or manganese vapor, and C out is the outlet concentration after treatment; the difference between the inlet and outlet concentrations represents the actual removal capacity of the device;

[0081] Concentration error coefficient (the error coefficient is used to quantify the deviation of the removal effect):

[0082]

[0083] C target Target outlet concentration;

[0084] C out Actual outlet concentration;

[0085] Rotation speed regulation formula of the induced draft fan 3:

[0086]

[0087] Current rotation speed of the induced draft fan 3 (i.e., the speed of the induced draft fan 3 dynamically adjusted according to the pollutant concentration);

[0088] N min , N max : The minimum and maximum rotation speeds of the induced draft fan 3 to ensure that the induced draft fan 3 operates within a reasonable range and prevent excessive or too low speeds from affecting the dust removal effect and energy consumption;

[0089] N f0 : The basic rotation speed of the induced draft fan 3 (i.e., the lowest operating speed, the default speed when operating in the absence of pollutants or low pollution);

[0090] represents the proportion of the outlet concentration. The higher the value, the worse the removal effect, and the induced draft fan 3 needs to run at an increased speed. ∈ is a small positive number to prevent the denominator from approaching 0 when ∈ is too small, thus avoiding calculation errors or abnormal increases in the rotation speed of the induced draft fan 3;

[0091] E c: Concentration error coefficient (indicating the deviation of the removal efficiency, used to correct the rotational speed of the induced draft fan 3;

[0092] C max : The maximum inlet concentration generated during the welding of high manganese steel, with a design value of 80 mg / m 3 ;

[0093] Normalized adjustment of the inlet concentration

[0094] This item ensures that the higher the inlet concentration, the faster the rotational speed of the induced draft fan 3 increases to cope with a higher pollution level;

[0095] If C in ≈C max (i.e., the pollution concentration is close to the maximum value of 80 mg / m 3 ), then is close to 1, meaning that the adjustment of the rotational speed of the induced draft fan 3 will be significantly accelerated;

[0096] If C in is very low, the influence of this item on the rotational speed of the induced draft fan 3 is small, with energy conservation as the main priority;

[0097] Implementation process:

[0098] Data monitoring: Use the monitoring module to collect the inlet concentration (C in ) and outlet concentration (C out ) of welding fume and manganese vapor in real time, and at the same time compare with the maximum allowable concentration (C max );

[0099] Dynamic calculation: Calculate the pollutant removal amount according to the concentration difference formula ΔC = C in -C out ; Calculate the concentration deviation according to the concentration error coefficient formula ;

[0100] Parameter regulation: According to the rotational speed regulation formula of the induced draft fan 3:

[0101] Dynamically adjust the rotational speed of the induced draft fan 3;

[0102] According to the spray flow regulation formula:

[0103] Dynamically adjust the spray flow;

[0104] Pollutant removal: The soot is collected for dust in the electrostatic precipitator chamber 4, and the manganese vapor and residual pollutants are further removed in the spray chamber 7. Based on the above control logic, the system background controls the variable-frequency motor and the flow control valve in real time to adjust the flow rate of the spray liquid and the rotation speed of the induced draft fan 3, thereby dynamically adjusting the rotation speed of the induced draft fan 3 to ensure that the soot and manganese vapor can be effectively removed at different concentration levels, while minimizing energy consumption. When the pollutant concentration is high and the removal effect is poor, the induced draft fan 3 runs at an accelerated speed to improve the air extraction capacity. When the pollutant concentration is low and the removal effect is good, the induced draft fan 3 reduces the rotation speed to reduce energy consumption.

[0105] In summary, for the high-manganese steel welding dust removal device and its operation method based on dynamic concentration regulation, during use, first, the soot is collected for dust in the electrostatic precipitator chamber 4, and the manganese vapor and residual pollutants are further removed in the spray chamber 7. Based on the above control logic, the system background controls the variable-frequency motor and the flow control valve in real time to adjust the flow rate of the spray liquid and the rotation speed of the induced draft fan 3, thereby dynamically adjusting the rotation speed of the induced draft fan 3 to ensure that the soot and manganese vapor can be effectively removed at different concentration levels;

[0106] When the induced draft fan 3 rotates, through the transmission of the transmission lead screw 601, the bevel gear set 602, and the reciprocating lead screw 603, the moving base 604 drives the dust removal head 606 to slide back and forth on the surface of the dust removal sheet 5, and the negative air pressure generated by the air extraction pump 610 is used to continuously suck the dust adsorbed on the surface of the dust removal sheet 5 by the electrostatic adsorption technology, so that the dust on the surface of the dust removal sheet 5 is always difficult to accumulate, thereby always maintaining the adsorption effect of the dust removal sheet 5. And when the reciprocating lead screw 603 rotates inside the electrostatic precipitator chamber 4, during the reciprocating movement of the moving base 604, the corrugated sleeve 11 stretches accordingly. Since the corrugated sleeve 11 is always sleeved outside the reciprocating lead screw 603, the reciprocating lead screw 603 is prevented from being exposed so that the dust in the flue gas adheres to its surface and affects the movement of the moving base 604.

[0107] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A dust removal device for high manganese steel welding based on dynamic concentration regulation, comprising a dust removal box (1) and a transmission cleaning component (6), characterized in that: One end of the dust removal box (1) is connected with an air inlet pipe (2), and an induced draft fan (3) is arranged inside the air inlet pipe (2). One end of the air inlet pipe (2) is connected with an electrostatic dust removal chamber (4), and dust removal sheets (5) are distributed on one side inside the electrostatic dust removal chamber (4). The transmission cleaning assembly (6) is connected to the bottom of the induced draft fan (3). One side of the electrostatic dust removal chamber (4) is connected with a spray chamber (7), and a spray pipe (8) is connected to the top of the spray chamber (7). The end of the spray pipe (8) is connected with a flow control valve, and a variable frequency motor is connected to the upper surface of the induced draft fan (3). Concentration sensors (9) are arranged on the surfaces of the exhaust pipe on the side of the spray chamber (7) and the air inlet pipe (2) on the side, and a waste liquid recovery pipe (10) is connected to the bottom of the spray chamber (7).

2. The dust removal device for high manganese steel welding based on dynamic concentration regulation according to claim 1, wherein: The transmission cleaning assembly (6) includes a transmission lead screw (601) and a bevel gear set (602). The bevel gear set (602) is arranged at the bottom of the transmission lead screw (601) and is arranged inside a dust-proof box.

3. The dust removal device for high manganese steel welding based on dynamic concentration regulation according to claim 2, wherein: The transmission cleaning assembly (6) further includes a reciprocating lead screw (603). The reciprocating lead screw (603) is connected to the side of the bevel gear set (602), and the length of the reciprocating lead screw (603) is adapted to the length of the dust removal sheet (5).

4. The dust removal device for high manganese steel welding based on dynamic concentration regulation according to claim 3, wherein: The transmission cleaning assembly (6) further includes a moving base (604). A moving base (604) is sleeved on the outer wall of the transmission lead screw (601). Corrugated sleeves (11) are rotatably connected to both ends of the moving base (604), and the corrugated sleeves (11) are sleeved outside the reciprocating lead screw (603).

5. The dust removal device for high manganese steel welding based on dynamic concentration regulation according to claim 4, wherein: The transmission cleaning assembly (6) further includes an air extraction rod frame (605). An air extraction rod frame (605) is fixed to the end of the moving base (604).

6. The dust removal device for high manganese steel welding based on dynamic concentration regulation according to claim 5, wherein: The transmission cleaning assembly (6) further includes a dust removal head (606). The dust removal head (606) is connected to the side of the air extraction rod frame (605) through a branch pipe.

7. The dust removal device for high manganese steel welding based on dynamic concentration regulation according to claim 6, wherein: The dust removal head (606) wraps the surface of the dust removal sheet (5), and the dust removal head (606) and the dust removal sheet (5) are arranged in a one-to-one manner.

8. The dust removal device for welding high manganese steel based on dynamic concentration regulation according to claim 5, characterized in that: The transmission cleaning assembly (6) further includes an air extraction pipe (607), a dust collection chamber (608), a dust filter net (609) and an air extraction pump (610). The air extraction pipe (607) is connected to the bottom of the air extraction rod frame (605), and the end of the air extraction pipe (607) is connected to the dust collection chamber (608). A dust filter net (609) is arranged on one side inside the dust collection chamber (608), and an air extraction pump (610) is connected to one side of the dust collection chamber (608).

9. The dust removal device for high manganese steel welding based on dynamic concentration regulation according to claim 1, wherein: The exhaust end of the air extraction pump (610) is connected to the inside of the electrostatic dust removal chamber (4) through a pipe, and the position of the exhaust end of the air extraction pump (610) is located on the left side of the dust removal sheet (5).

10. A running method, which is applied to a high manganese steel welding dust removal device based on dynamic concentration regulation according to any one of claims 1-9, and is characterized in that: The operation method includes the following steps: Step 1: During the welding process, welding fumes and manganese vapor pass through the electrostatic dust removal chamber (4) and the spraying chamber (7) in sequence from the intake pipe (2). The electrostatic dust removal chamber (4) is used to capture fine particles in the welding fumes. The spraying chamber (7) further removes manganese vapor, manganese oxides, and residual gases by spraying the adsorption liquid. The waste liquid generated by spraying is discharged from the waste liquid recovery pipe (10), and the treated gas is discharged from the exhaust pipe on the side of the spraying chamber (7). Among them, the inlet concentration C of soot and manganese vapor during the welding process is monitored in real time by a concentration sensor (9). in and the outlet concentration C out , and the concentration data is transmitted to the system background. Step 2: The system background dynamically calculates the concentration difference ΔC = C in - C out and the concentration error coefficient E c , and dynamically calculates the rotational speed of the induced draft fan (3) and the flow rate of the spray liquid. For the concentration difference formula ΔC: ΔC = C in - C out , in which C in is the inlet concentration of welding fume or manganese vapor, and C out is the outlet concentration after treatment; the difference between the inlet and outlet concentrations represents the actual removal capacity of the device; the larger the difference, the better the dust removal effect; the concentration error coefficient is used to quantify the deviation of the removal effect. The larger the error coefficient, the more the dust removal effect deviates from the target value, and the greater the adjustment required for the device: C target Target outlet concentration; C out Actual outlet concentration; Speed regulation formula for the induced draft fan (3): N f : Rotational speed of the current induced draft fan (3); N min : The minimum allowable speed of the induced draft fan to prevent the fan speed from being too low to meet the basic dust removal requirements; N max : The maximum allowable speed of the induced draft fan, which restricts the maximum speed of the fan to avoid energy consumption waste and equipment overload; N f0 : Basic speed of the induced draft fan (3), i.e., the normal speed during initial operation; Indicates the proportion of the outlet concentration, which is the ratio of the outlet concentration to the inlet concentration, reflecting the real-time dust removal effect. The higher the ratio, the worse the dust removal effect, and the higher the rotation speed needs to be increased; E c : Concentration error coefficient, a correction term for the deviation between the real-time dust removal effect and the target. The greater the error, the higher the rotational speed will be accordingly; C max : The maximum inlet concentration generated during the welding of high manganese steel, with a design value of 80 mg / m 3 ; K1, K2, K3: The weight coefficients are adjustable. K1: Generally, the value ranges from 0.1 to 0.3 and is used to adjust the sensitivity of the rotational speed to the ratio of the outlet concentration to the inlet concentration. K2: Generally, the value ranges from 0.1 to 0.3 and is used to adjust the response strength when the actual dust removal effect deviates from the target. K3: Generally, the value ranges from 0.2 to 0.4 and is used to adjust the response of the fan when the inlet concentration approaches the design maximum value. Spraying flow rate regulation formula: Q p : Current spray liquid flow rate; Q p0 : Base spray liquid flow rate; K4: Controls the influence of the ratio of the outlet concentration to the inlet concentration on the flow rate. The recommended value range is 0.1 to 0.3; K5: Controls the influence of the error coefficient on the flow rate. The recommended value range is 0.1 to 0.3; Step 3: Based on the calculation results of the speed formula of the induced draft fan (3) and the spraying flow rate regulation formula, the system background controls the frequency conversion motor and the flow control valve in real time to adjust the spraying liquid flow rate and the speed of the induced draft fan (3).

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