System for improving burning loss problem of dust collecting bag in blast furnace tapping process

Abstract

The system comprises a bag-type dust collector and a ladle barrel, a smoke cover is installed above the ladle barrel, the smoke cover is connected with an air inlet of the bag-type dust collector through a dust suction pipe, a dust collecting bag is installed in the bag-type dust collector, and the dust collecting bag is connected with the air inlet of the bag-type dust collector through a dust suction pipe. The fan is installed at the top of the bag-type dust collector and connected with an air outlet in the top of the dust collecting bag, the outer side of the dust suction pipe is wrapped with a cooling water sleeve, an electromagnetic valve is installed at a water inlet of the cooling water sleeve, and an electromagnet is installed at the position, close to an air inlet of the bag-type dust collector, in the dust suction pipe; a gas flow sensor is installed at the position, close to an air outlet of the smoke cover, in the dust suction pipe, a smoke concentration sensor is installed in the smoke cover, and the smoke concentration sensor, the gas flow sensor, the electromagnet, the electromagnetic valve and the draught fan are all electrically connected with a control system. By combining various means, the problem of burning loss of the dust collecting bag in the blast furnace tapping process can be effectively solved, and the method is efficient and energy-saving.

Description

Technical Field

[0001] The invention relates to the technical field of steelmaking, and in particular to a system for improving the problem of dust bag burning during blast furnace iron tapping. Background Art

[0002] Using dry dust removal technology to treat flue gas during blast furnace iron-making can reduce pollution, save energy, and save water resources. It is a new path for steel companies to open up a circular economy and clean production. The burning of dust bags during blast furnace iron-making has always been a major problem in blast furnace iron-making. After the dust bags are burned, the dust removal effect will be seriously affected. The dust in the flue gas is directly discharged into the atmosphere without treatment, causing serious pollution. In addition, the frequent burning of dust bags will also increase the cost of blast furnace iron-making.

[0003] In the prior art, the dust removal structure and principle in the blast furnace iron-making process are as follows: Figure 1 As shown, when the blast furnace is tapping iron, the molten iron ladle 2 is transported to the bottom of the tapping groove 1, and then the smoke hood 3 is opened, and the dust removal fan 7 is turned on. The smoke in the tapping process enters the bag filter 5 through the dust removal pipe 4 as drawn by the fan 7, and the dust-containing gas is filtered through the dust removal bag 6. The dust particles in the smoke adhere to the woven holes and the bag wall, and gradually form an ash film. The smoke is purified when passing through the bag and the ash film. As the filtration continues, the ash film thickens and the resistance increases. When it reaches a certain value, backblowing is performed to shake off most of the ash film to reduce the resistance and restore normal filtration. However, during the blast furnace iron-tapping process, when the molten iron in the iron-tapping groove 1 is poured into the ladle barrel 2, the contact between the molten iron and the ladle will generate a certain impact force, causing splashing; when there is molten iron in the ladle barrel 2, as the iron-tapping continues, the molten iron in the iron groove has a certain impact on the molten iron in the ladle, causing the molten iron in the ladle to move, which also causes splashing; when there are attachments on the inner wall of the ladle, when the molten iron contacts it, splashing will also occur. After the molten iron splashes, high-temperature "iron flowers" (temperature is about 550°C) will be generated, and the "iron flowers" will enter the dust removal pipeline 4 along with the smoke. With the extraction of the dust removal fan 7, the "iron flowers" that have not had time to cool will contact the dust removal bag 6, causing the dust removal bag 6 to burn (high temperature resistant to 350°C), thereby affecting the continued operation of the dust removal bag, which will inevitably cause the deterioration of the dust removal effect.

[0004] In addition, through observation and research, in the actual blast furnace iron-tapping process, the content of iron flowers in the smoke dust concentration is different at each stage. For example, when the molten iron in the iron-tapping groove 1 is just poured into the empty ladle bucket 2, a large amount of smoke dust will be instantly generated. At this time, the smoke dust contains a large amount of "iron flowers". As the molten iron is continuously injected, the smoke dust concentration and the amount of "iron flowers" contained gradually stabilize. When the molten iron is about to be poured, the smoke dust concentration and the amount of "iron flowers" contained continue to decrease. Therefore, how to improve the problem of dust bag burning during blast furnace iron-tapping in view of the above situation is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a system for improving the problem of dust bag burning during blast furnace iron tapping. By combining multiple means, the problem of dust bag burning during blast furnace iron tapping can be effectively improved, and it is highly efficient and energy-saving.

[0006] To achieve the above technical solution, the present invention provides a system for improving the problem of dust bag burning during blast furnace iron tapping, comprising: a bag collector and a molten iron ladle, a dust hood is installed above the molten iron ladle, the dust hood is connected to the air inlet of the bag collector through a dust suction pipe, dust bags are installed in the bag collector, a fan is installed on the top of the bag collector and connected to the air outlet of the top of the dust bag, a cooling water jacket is wrapped on the outside of the dust suction pipe, a solenoid valve is installed at the water inlet of the cooling water jacket, an electromagnet is installed in the dust suction pipe near the air inlet of the bag collector, a gas flow sensor is installed in the dust suction pipe near the air outlet of the dust hood, a smoke concentration sensor is installed in the smoke hood, and the smoke concentration sensor, gas flow sensor, electromagnet, solenoid valve and fan are all electrically connected to the control system.

[0007] Preferably, the control system controls the fan flow, solenoid valve and electromagnet in the following manner:

[0008] S1. When the smoke concentration sensor senses that the smoke concentration in the smoke hood suddenly increases significantly and is less than the maximum concentration C that the system can handle 最高 When the fan is turned off, the control system controls the fan to reduce the fan speed and reduce the air volume to the preset air volume Q 低 , and at the same time control the solenoid valve to increase the cooling water flow and turn on the electromagnet;

[0009] S2. When the smoke concentration sensor senses that the smoke concentration in the smoke hood is stable and at the highest concentration that the system can handle, C 最高 and the concentration C that the system presets to be able to effectively handle 预设 When the fan speed is between 0 and 1, the control system controls the fan to increase the fan speed and increase the air volume to the preset air volume Q. 高, while keeping the cooling water flow stable by controlling the solenoid valve and continuously turning on the electromagnet;

[0010] S3. When the smoke concentration sensor senses that the smoke concentration in the smoke hood is lower than the concentration that can be effectively treated, 预设 Finally, the control system controls the fan to keep the fan speed unchanged, and at the same time reduces the cooling water flow by controlling the solenoid valve, and closes the electromagnet. The cooled smoke and dust are then brought into the bag filter for removal with the iron filings originally adsorbed on the electromagnet.

[0011] Preferably, the control system controls the change of the air volume of the fan in the following manner:

[0012] S11. Use the three-point measurement method to calculate the fan flow rate in actual work based on the fan speed n and the fan outlet boost pressure P. The calculation formula is shown in Formula 1:

[0013]

[0014] Among them, P 1 , P 2 , P is the outlet pressure of the fan at different time periods, and P 2 >P>P 1 , n 1 , n 2 , n are P 1 , P 2 , the corresponding motor speed at P;

[0015] According to formula 1, it can be concluded that 1 The fan inlet flow rate Q when the boost pressure is P at the speed n1 , and then according to the calculated Q n1 The following formula 2 is obtained:

[0016]

[0017] According to formula 2, the fan inlet flow rate Q is obtained when the boost pressure is P and the fan speed is n. n , Q n The fan flow rate in actual application under standard suction conditions;

[0018] S12, let M be the motor shaft output torque, n be the motor speed, K1, K2, K3 be the proportional coefficients, then the input power W can be calculated as:

[0019] W=K 1 Mn=K 2 n 2.4 =K3Q n 2.4

[0020] The input power W is proportional to the 2.4th power of the speed or flow rate. When the flow rate Q is changed by speed regulation n When , the input electric power W decreases according to the 2.4th power of the flow rate.

[0021] Preferably, when the smoke concentration sensor senses that the smoke concentration in the smoke hood is greater than the maximum concentration C that the system can handle, 最高 When the fan stops working, the control system will stop the fan immediately.

[0022] Preferably, the highest concentration C that the system can handle is 最高 The calculation method is: when the control system controls the fan to drive the bag filter to work normally with the minimum power, and the solenoid valve opens the cooling water flow to the maximum, and the electromagnet is turned on, the dust bag is still damaged. The smoke concentration is the highest concentration C that the system can handle. 最高 .

[0023] Preferably, the system preset concentration C that can be effectively treated 预设 The calculation method is: when the control system controls the fan with air volume Q 高 Drive the bag dust collector to work normally, and the solenoid valve is closed, the solenoid is closed, and the dust bag is still not damaged. The smoke concentration is the concentration C that the system presets to be effectively processed. 预设 .

[0024] Preferably, a sawtooth damper is installed at the bottom of the ladle barrel to reduce the amount of iron flowers generated by the impact and collision between the molten iron and the ladle barrel when the molten iron is first poured into the ladle barrel.

[0025] The beneficial effect of the system provided by the present invention for improving the problem of dust bag burning during blast furnace iron tapping is that: the present invention wraps a cooling water jacket on the outside of the dust suction pipe, installs an electromagnet in the dust suction pipe near the air inlet of the bag dust collector, and installs a gas flow sensor in the dust suction pipe near the air outlet of the smoke hood. The control system can effectively cool and eliminate high-temperature "iron flowers" that follow the smoke into the dust removal pipe through intelligent control of the fan flow, cooling water flow and the opening and closing of the electromagnet according to the smoke concentration at different stages, and prevent the high-temperature "iron flowers" from entering the bag dust collector and burning the dust bags, thereby effectively improving the problem of dust bag burning during blast furnace iron tapping, and realizing intelligent control at different stages, effectively saving energy consumption, reducing water use, and achieving high efficiency and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the dust removal structure in the blast furnace iron-making process in the prior art.

[0027] Figure 2 It is a structural schematic diagram of the present invention.

[0028] In the figure: 1. Iron tapping groove; 2. Hot metal ladle; 3. Dust hood; 4. Dust suction pipe; 5. Bag filter; 6. Dust bag; 7. Fan; 8. Cooling water jacket; 9. Electromagnet; 10. Control system; 11. Sawtooth damper; 12. Gas flow sensor; 13. Dust concentration sensor; 14. Solenoid valve. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0030] Embodiment: A system for improving the dust bag burning problem during the blast furnace iron-making process.

[0031] Reference Figure 1 and Figure 2 As shown, a system for improving the dust bag burning problem during the iron-discharging process of a blast furnace is shown, which specifically comprises: a bag dust collector 5 and a ladle barrel 2, the ladle barrel 2 is installed below the iron-discharging groove 1, and a sawtooth damper 11 is installed at the bottom of the ladle barrel 2. When the molten iron is just beginning to be poured into the ladle barrel 2, a strong impact and collision will occur between the molten iron and the ladle barrel 2, and a large number of iron flowers will be generated. By installing the sawtooth damper 11 at the bottom of the ladle barrel 2, the impact and collision between the molten iron and the ladle barrel when the molten iron is just beginning to be poured into the ladle barrel can be effectively reduced, thereby reducing the number of iron flowers. A smoke hood 3 is installed above the ladle barrel 2, and the smoke hood 3 is connected to the air inlet of the bag dust collector 5 through a dust suction pipe 4. A dust bag 6 is installed in the bag dust collector 5 for filtering smoke and iron filings. A fan 7 is installed on the top of the bag dust collector 5 and is connected to the top of the dust bag 6. The air outlet is connected, the outer side of the dust suction pipe 4 is wrapped with a cooling water jacket 8, and a solenoid valve 14 is installed at the water inlet of the cooling water jacket 8. During actual operation, the water flow in the cooling water jacket 8 can be controlled by the solenoid valve 14, so as to control the cooling rate of the high-temperature smoke and high-temperature "iron flowers" in the dust suction pipe 4. An electromagnet 9 is installed in the dust suction pipe 4 near the air inlet of the bag dust collector 5. The electromagnet 9 is used to adsorb the "iron flowers". A gas flow sensor 12 is installed in the dust suction pipe 4 near the air outlet of the smoke hood 3 for real-time monitoring of the gas flow at the entrance of the dust suction pipe 4. A smoke concentration sensor 13 is installed in the smoke hood 3 for real-time monitoring of the smoke concentration so as to provide control signals for the control of the fan, the solenoid valve and the electromagnet. The smoke concentration sensor 13, the gas flow sensor 12, the electromagnet 9, the solenoid valve 14 and the fan 7 are all electrically connected to the control system 10.

[0032] In actual operation, the content of high-temperature iron flowers in the smoke concentration at each stage during the blast furnace iron-out process is different. For example, when the molten iron in the iron-out groove 1 is just injected into the empty iron ladle bucket 2, a large amount of smoke will be generated instantly. At this time, the smoke contains a large amount of "iron flowers". As the molten iron is continuously injected, the smoke concentration and the amount of "iron flowers" contained gradually stabilize. When the molten iron is about to be poured, the smoke concentration and the amount of "iron flowers" contained continue to decrease. In the present invention, the control system 10 will perform segmented control according to the different smoke concentrations in different stages during the blast furnace iron-out process, while preventing the high-temperature "iron flowers" from entering the bag filter 5, the purpose of water saving and energy saving is achieved.

[0033] The control system controls the fan flow, solenoid valve and electromagnet in the following ways:

[0034] (i) When the smoke concentration sensor 13 senses that the smoke concentration in the smoke hood 3 suddenly increases significantly and is less than the maximum concentration C that the system can handle 最高 At this time (this is the stage when the molten iron in the iron outlet groove 1 has just been poured into the empty ladle bucket 2), the control system 10 controls the fan 7 to reduce the speed of the fan 7 and reduce the exhaust air volume to the preset air volume Q 低 , and at the same time, control the solenoid valve 14 to increase the cooling water flow rate, and turn on the electromagnet 9. Since a large amount of smoke and dust will be generated instantly at this stage, and the smoke and dust contains a large amount of high-temperature "iron flowers", it is necessary to reduce the flow rate of the fan 7 and increase the cooling water flow rate at the same time. By combining the method of reducing the flow rate, increasing the cooling water flow rate and turning on the electromagnet 9, it is ensured that the smoke and dust containing a large amount of high-temperature "iron flowers" can be cooled in the dust suction pipe 4 and adsorbed on the electromagnet 9, thereby avoiding the occurrence of high-temperature "iron flowers" burning the dust bag 6 at this stage. However, the water consumption at this stage is relatively large.

[0035] In addition, when the smoke concentration sensor 13 senses that the smoke concentration in the smoke hood 3 is greater than the maximum concentration C that the system can handle, 最高 When the dust is discharged, the control system 10 controls the fan 7 to stop working immediately to protect the bag filter 5 and avoid large-scale damage to the dust bag 6. In the present invention, the maximum concentration that the system can handle is C 最高 The calculation method is as follows: when the control system 10 controls the fan 7 to drive the bag filter 5 to work normally with the minimum power, and the solenoid valve 14 opens the cooling water flow to the maximum, and the electromagnet 9 is turned on, the dust bag 6 is still damaged. The smoke concentration is the highest concentration C that the system can handle. 最高 , the highest concentration C 最高 It can be calculated based on the actual processing capacity.

[0036] (ii) When the smoke concentration sensor 13 senses that the smoke concentration in the smoke hood 3 is stable and at the highest concentration C that the system can handle,最高 and the concentration C that the system presets to be able to effectively handle 预设 During this period (at this time, with the continuous injection of molten iron, the smoke concentration and the amount of "iron flowers" contained in it gradually stabilize), the control system 10 controls the fan 7 to increase the fan speed and increase the exhaust volume to the preset air volume Q 高 , and at the same time, the cooling water flow rate is kept stable by controlling the electromagnetic valve 14, and the electromagnet 9 is continuously turned on. Since the smoke concentration and the amount of high-temperature "iron flowers" contained in this stage gradually stabilize, the flow rate of the fan 7 can be increased, and the cooling water flow rate can be maintained at the same time. By combining the increase in air volume, the maintenance of the cooling water flow rate and the opening of the electromagnet 9, the efficiency of smoke filtration is improved, and it is ensured that the smoke containing high-temperature "iron flowers" can be cooled in the dust suction pipe 4 and adsorbed on the electromagnet 9. Since the processing time of this stage lasts for a long time, therefore, increasing the air volume can effectively improve the smoke filtration efficiency and save energy and reduce consumption.

[0037] In the present invention, the system presets a concentration C that can be effectively treated. 预设 The calculation method is as follows: the control system 10 controls the fan 7 with an air volume Q 高 When the bag filter 5 is driven to work normally, and the solenoid valve 14 is closed and the electromagnet 9 is closed, the smoke concentration when the dust bag 6 is not damaged is the concentration C that can be effectively treated by the system preset. 预设 .

[0038] (iii) When the smoke concentration sensor 13 senses that the smoke concentration in the smoke hood 3 is lower than the concentration C that can be effectively treated 预设 After that, the control system 10 controls the fan 7 to keep the fan speed unchanged, and at the same time controls the solenoid valve 14 to reduce the cooling water flow, and closes the electromagnet 9, so that the iron filings originally adsorbed on the electromagnet 9 are brought into the bag filter 5 for removal through the cooled smoke. Due to the smoke concentration and the amount of high-temperature "iron flowers" contained in this stage, in order to save energy and water, the cooling water flow can be reduced while maintaining the flow of the fan 7, and the electromagnet 9 can be closed, and finally the iron filings originally adsorbed on the electromagnet 9 are brought into the bag filter 5 for removal through the cooled smoke, so as to achieve the purpose of energy saving and water saving.

[0039] Since there is a significant difference between the actual flow rate of the fan and the standard fan flow rate provided by the manufacturer during the actual working process, if the flow rate is simply controlled by the parameters provided by the fan manufacturer, the difference between the actual flow rate of the fan and the actual flow rate of the fan during the actual working process is relatively large, and it is impossible to achieve accurate control of the actual flow rate of the fan 7. Therefore, in order to accurately control the air volume of the fan 7 during the actual application process, the present invention provides a method for accurately controlling the air volume of the fan 7 during the dust removal process, which accurately controls the air volume of the fan by controlling the rotation speed of the fan 7.

[0040] In the present invention, the control system specifically controls the change of the exhaust volume of the fan in the following manner:

[0041] 1. Use the three-point measurement method to calculate the fan flow rate in actual work based on the fan speed n and the fan outlet boost pressure P. The calculation formula is shown in Formula 1:

[0042]

[0043] Among them, P 1 , P 2 , P is the outlet pressure of the fan at different time periods, and P 2 >P>P 1 , n 1 , n 2 , n are P 1 , P 2 , the corresponding motor speed at P;

[0044] According to formula 1, it can be concluded that 1 The fan inlet flow rate Q when the boost pressure is P at the speed n1 , and then according to the calculated Q n1 The following formula 2 is obtained:

[0045]

[0046] According to formula 2, the fan inlet flow rate Q is obtained when the boost pressure is P and the fan speed is n. n , Q n The fan flow rate in actual application under standard suction conditions;

[0047] 2. Let M be the motor shaft output torque, n be the motor speed, K1, K2, K3 be the proportional coefficients, then the input power W can be calculated as:

[0048] W=K 1 Mn=K 2 n 2.4 =K3Q n 2.4

[0049] The input power W is proportional to the 2.4th power of the speed or flow rate. When the flow rate Q is changed by speed regulation n When , the input electric power W decreases according to the 2.4th power of the flow rate.

[0050] Through the above calculation method, the air volume of the fan can be accurately controlled by controlling the rotation speed of the fan 7.

[0051] The present invention wraps a cooling water jacket on the outside of the dust suction pipe, installs an electromagnet in the dust suction pipe near the air inlet of the bag dust collector, and installs a gas flow sensor in the dust suction pipe near the air outlet of the smoke hood. The control system can effectively cool and eliminate high-temperature "iron flowers" that follow the smoke into the dust removal pipe through intelligent control of the fan flow, cooling water flow and opening and closing of the electromagnet according to the smoke concentration at different stages, and prevent the high-temperature "iron flowers" from entering the bag dust collector and burning the dust removal bags, thereby effectively improving the problem of dust removal bag burning during the iron tapping process of the blast furnace, and realizing intelligent control at different stages, effectively saving energy consumption, reducing water use, and achieving high efficiency and energy saving.

[0052] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A system for improving the burning problem of dust removal bags during blast furnace iron-making process, comprising: A bag-type dust collector and a ladle barrel, a dust hood is installed above the ladle barrel, the dust hood is connected to the air inlet of the bag-type dust collector through a dust suction pipe, a dust bag is installed in the bag-type dust collector, a fan is installed on the top of the bag-type dust collector and connected to the air outlet of the top of the dust bag, and it is characterized in that: a cooling water jacket is wrapped on the outside of the dust suction pipe, a solenoid valve is installed at the water inlet of the cooling water jacket, an electromagnet is installed in the dust suction pipe near the air inlet of the bag-type dust collector, a gas flow sensor is installed in the dust suction pipe near the air outlet of the dust hood, a smoke concentration sensor is installed in the smoke hood, and the smoke concentration sensor, gas flow sensor, electromagnet, solenoid valve and fan are all electrically connected to the control system.

2. The system for improving the dust bag burning problem in the blast furnace iron-making process according to claim 1 is characterized in that: The control system controls the fan flow, solenoid valve and electromagnet in the following ways: S1. When the smoke concentration sensor senses that the smoke concentration in the smoke hood suddenly increases significantly and is less than the maximum concentration C that the system can handle 最高 When the fan is turned off, the control system controls the fan to reduce the fan speed and reduce the air volume to the preset air volume Q 低 , and at the same time control the solenoid valve to increase the cooling water flow and turn on the electromagnet; S2. When the smoke concentration sensor senses that the smoke concentration in the smoke hood is stable and at the highest concentration that the system can handle, C 最高 and the concentration C that the system presets to be able to effectively handle 预设 When the fan speed is between 0 and 1, the control system controls the fan to increase the fan speed and increase the air volume to the preset air volume Q. 高 , while keeping the cooling water flow stable by controlling the solenoid valve and continuously turning on the electromagnet; S3. When the smoke concentration sensor senses that the smoke concentration in the smoke hood is lower than the concentration that can be effectively treated, 预设 Finally, the control system controls the fan to keep the fan speed unchanged, and at the same time reduces the cooling water flow by controlling the solenoid valve, and closes the electromagnet. The cooled smoke and dust are then brought into the bag filter for removal with the iron filings originally adsorbed on the electromagnet.

3. The system for improving the dust bag burning problem in the blast furnace iron-making process according to claim 2, characterized in that: The control system specifically controls the change of the exhaust volume of the fan in the following manner: S11. Use the three-point measurement method to calculate the fan flow rate in actual work based on the fan speed n and the fan outlet boost pressure P. The calculation formula is shown in Formula 1: Wherein, P1, P2, P are the outlet pressures of the fan at different time periods, and P2>P>P1, n1, n2, n are the corresponding motor speeds when P1, P2, P respectively; According to formula 1, the fan inlet flow rate Q can be obtained when the boost pressure is P at n1 speed. n1 , and then according to the calculated Q n1 The following formula 2 is obtained: According to formula 2, the fan inlet flow rate Q is obtained when the boost pressure is P and the fan speed is n. n , Q n The fan flow rate in actual application under standard suction conditions; S12, let M be the motor shaft output torque, n be the motor speed, K1, K2, K3 be the proportional coefficients, then the input power W can be calculated as: W=K1Mn=K2n 2.4 =K3Q n 2.4 The input power W is proportional to the 2.4th power of the speed or flow rate. When the flow rate Q is changed by speed regulation n When , the input electric power W decreases according to the 2.4th power of the flow rate.

4. The system for improving the dust bag burning problem in the blast furnace iron-tapping process according to claim 2 is characterized in that: When the smoke concentration sensor senses that the smoke concentration in the smoke hood is greater than the maximum concentration that the system can handle, 最高 When the fan stops working, the control system will stop the fan immediately.

5. The system for improving the dust bag burning problem in the blast furnace iron-making process according to claim 2, characterized in that: The highest concentration that the system can handle is C 最高 The calculation method is: when the control system controls the fan to drive the bag filter to work normally with the minimum power, and the solenoid valve opens the cooling water flow to the maximum, and the electromagnet is turned on, the dust bag is still damaged. The smoke concentration is the highest concentration C that the system can handle. 最高 .

6. The system for improving the dust bag burning problem in the blast furnace iron-making process according to claim 1, characterized in that: The system preset concentration C that can be effectively treated 预设 The calculation method is: when the control system controls the fan with air volume Q 高 Drive the bag dust collector to work normally, and the solenoid valve is closed, and the electromagnet is closed, and the dust bag is still not damaged. The smoke concentration is the concentration C that the system presets to be effectively handled. 预设 .

7. The system for improving the dust bag burning problem in the blast furnace iron-making process according to claim 1, characterized in that: A sawtooth damper is installed at the bottom of the ladle barrel.

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