A blast furnace gas main pressure regulating system for coke ovens

Abstract

The invention provides a blast furnace gas main pressure regulating system for a coke oven. The regulating system comprises a regulating device, a dispersing device, a monitoring device and a control device. The regulating device is arranged on a first pipeline and is used for regulating the gas transmitted from the blast furnace to the coke oven. The dispersing device is arranged on a second pipeline and is used for dispersing the gas in the first pipeline. The monitoring device is arranged on the first pipeline and is used for monitoring the gas pressure of the first pipeline. The control device is electrically connected with the regulating device and is used for controlling the opening and closing of the regulating device. The invention uses a DCS system configuration to pre-close a regulating valve before pressure fluctuations to stabilize the pressure. The operation is simple, safe and reliable. The pressure of the gas entering the coke oven is stable and the safety of the coke oven is ensured. The button for controlling the coke oven is automatically put into operation through a DCS screen control panel. The control is fully automatic. The gas after the pressure stabilization reduces the impact on the regulating valve, thereby increasing the service life of the regulating valve and reducing the production cost.

Description

Technical Field

[0001] The invention belongs to the technical field of blast furnace gas pressure regulation, and in particular relates to a blast furnace gas main pressure regulation system for a coke oven. Background Art

[0002] The use of blast furnace gas to heat coke ovens is widely used in large steel companies. Comprehensive on-site conditions are planned to achieve the purpose of comprehensive utilization of blast furnace gas, save energy, and reduce environmental pollution. However, in the actual production process, the unstable pressure of the blast furnace gas main causes excessive pressure fluctuations at the end of the coke oven, posing a safety hazard to production. The current method is to use a high gas main pressure control system to meet production needs.

[0003] When the blast furnace gas flow required for coke oven heating is normal, it is: blast furnace - gas holder - pressure regulating valve - coke oven. When the gas holder is under maintenance, the blast furnace gas flow is: blast furnace - pressure regulating valve - coke oven. During normal production, the blast furnace gas is transported to the coke oven after being stabilized by the gas holder. At this time, the stable pressure fluctuation range is less than 1kPa. However, when the gas holder is under maintenance, the blast furnace gas is not stabilized before entering the coke oven for use. During the blast furnace smelting process, the blast furnace gas fluctuates during blast furnace production, resulting in a pipeline pressure fluctuation range of 5kPa. The timed reversal during coke oven heating causes the blast furnace gas pressure fluctuation range to be 3kPa. The entire fluctuation peak will cause the pressure at the end of the coke oven to be greater than 8kPa. Since there is no gas holder to stabilize the gas pressure, only the regulating valve is used to regulate the gas, and the pressure regulation effect is not ideal, which is easy to cause safety accidents.

[0004] Therefore, in order to meet the needs of safe production, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a blast furnace gas main pressure regulating system for a coke oven. Through the DCS system configuration, the regulating valve is switched and the valve is pre-closed before the pressure fluctuation, and the gas is pressure-stabilized. The operation process is simple, safe and reliable, and the pressure of the heating gas entering the coke oven is guaranteed to be stable, the safety of the coke oven is guaranteed, and safe production is ensured to be carried out in an orderly manner.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a blast furnace gas main pressure regulating system for a coke oven, the regulating system comprising:

[0008] A regulating device, which is arranged on the pipeline of the first pipeline and is located downstream of the blast furnace and upstream of the coke oven, and is used to regulate the gas supplied from the blast furnace to the coke oven; a dispersing device, which is arranged on the pipeline of the second pipeline, the second pipeline is connected to the first pipeline and is located on one side of the first pipeline, and the dispersing device is used to disperse the gas in the first pipeline; a monitoring device, which is arranged on the first pipeline and is used to monitor the gas pressure of the first pipeline; a control device, which is electrically connected to the regulating device and is used to control the opening and closing of the regulating device.

[0009] According to the above-mentioned blast furnace gas main pressure regulating system for coke oven, as a preferred embodiment, the regulating device comprises: a regulating valve, the regulating valve is arranged on the pipeline of the first pipeline, one end of the regulating valve is connected to the outlet of the blast furnace, and the other end is connected to the inlet of the coke oven, and is used to regulate the amount of gas transported from the blast furnace to the coke oven;

[0010] Preferably, the regulating valve is a pneumatic regulating valve.

[0011] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred embodiment, the relief device includes: a pre-valve relief valve, which is arranged on the pipeline of the second pipeline and located upstream of the regulating device, and is used to release the gas pressure discharged from the blast furnace.

[0012] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred embodiment, the venting device also includes: a post-valve venting valve, which is arranged on the pipeline of the second pipeline and located downstream of the regulating device, and is used to release the gas pressure after passing through the regulating device.

[0013] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred solution, the monitoring device includes: a pre-valve transmitter, the pre-valve transmitter is arranged on the first pipeline and is located upstream of the regulating device, and is used to monitor the pressure of the gas before passing through the regulating device;

[0014] A post-valve transmitter is arranged on the first pipeline and downstream of the regulating device, and is used to monitor the pressure of the coal gas after passing through the regulating device.

[0015] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred embodiment, the venting device also includes: an exhaust pipe, one end of which is connected to the second pipeline and the other end extends to the atmosphere to discharge the gas released by the venting device.

[0016] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred embodiment, the control device includes a DCS screen control panel, and the states of the regulating device, the venting device and the monitoring device are all presented on the DCS screen control panel; buttons are provided on the DCS screen control panel, and the state of the regulating device can be changed by controlling the buttons.

[0017] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred solution, the normal valve position opening amount of the regulating valve is 40%.

[0018] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred solution, the upper limit of the valve position opening of the regulating valve is 60%, and the lower limit is 25%.

[0019] According to the above-mentioned blast furnace gas main pressure regulating system for coke ovens, as a preferred solution, 10 seconds before the coke ovens are switched, the valve position of the regulating valve is pre-closed from 40% to 35%.

[0020] Compared with the closest prior art, the technical solution provided by the present invention has the following excellent effects:

[0021] The invention provides a blast furnace gas main pressure regulating system for a coke oven. The regulating system is connected to a blast furnace gas main pressure control system. Through a DCS system configuration, a regulating valve is switched, and the regulating valve is pre-closed before pressure fluctuation to stabilize the pressure. The operation is simple, safe and reliable, and the pressure of the gas entering the coke oven is guaranteed to be stable, the safety of the coke oven is guaranteed, and the production is guaranteed to be carried out in an orderly manner. The buttons for controlling the coke oven are automatically put into operation through a DCS screen control panel, and the system is fully automatically controlled without manual operation, thereby reducing the impact of pressure fluctuations in the pipeline on the regulating valve, reducing the operating frequency of the regulating valve, increasing the service life of the regulating valve, and reducing the production cost. The control method is diversified, and the pressure behind the valve can be stabilized for a long time. The gas is released twice through a pre-valve release valve and a post-valve release valve, thereby reducing the fluctuation of the gas generation amount, and stabilizing the pressure of the gas entering the coke oven to achieve an ideal pressure stabilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the regulating system in the embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the control principle in an embodiment of the present invention.

[0024] In the figure: 1. blast furnace; 2. coke oven; 3. first pipeline; 4. second pipeline; 5. regulating valve; 6. relief valve before valve; 7. relief valve after valve; 8. transmitter before valve; 9. transmitter after valve; 10. exhaust pipe; 11. DCS screen control panel; 12. 1# coke oven valve position automatic control button; 13. 2# coke oven valve position automatic control button; 14. 1# coke oven reversing time setting button; 15. 2# coke oven reversing time setting button; 16. blast furnace gas valve position locking button; 17. blast furnace gas valve position locking time setting button. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. In the description of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and does not require the present invention to be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0027] like Figure 1 As shown, the present invention provides a blast furnace gas main pressure regulating system for a coke oven, the regulating system comprising a regulating device, a dispersing device, a monitoring device and a control device, the regulating device being installed on the pipeline of a first pipeline 3 and being located downstream of a blast furnace 1 and upstream of a coke oven 2, and being used for regulating the gas transmitted from the blast furnace 1 to the coke oven 2; the dispersing device being arranged on the pipeline of a second pipeline 4, the second pipeline 4 being connected to the first pipeline 3 and being located on one side of the first pipeline 3, the dispersing device being used for dispersing the gas in the first pipeline 3, specifically, the second pipeline 4 being a branch pipeline of the first pipeline 3, the dispersing device being installed on the pipeline of the second pipeline 4; the monitoring device being arranged on the first pipeline 3, and being used for monitoring the gas pressure of the first pipeline 3; the control device being electrically connected to the regulating device, and the control device being used for controlling the opening and closing of the regulating device.

[0028] Specifically, during normal production, the gas from blast furnace 1 is pressure-stabilized by the gas holder and then transported to coke oven 2 to ensure the safety of the production process. When the gas holder is under maintenance, the gas pressure needs to be stabilized to ensure the safety of coke oven 2. After the gas comes out of blast furnace 1, it is adjusted by the regulating device to reduce the pressure of the gas entering coke oven 2 and reduce the fluctuation of the gas. The second pipeline 4 is a branch pipeline of the first pipeline 3. The excess gas is discharged from the second pipeline 4 through the venting device to ensure the safety of the first pipeline 3. The control device automatically controls the reversing of the regulating device throughout the process. Specifically, the reversing signal of coke oven 1# and coke oven 2# is sent by the reversing cabinet. The DCS receives the reversing signal and controls the regulating device to perform reversing. In the actual production process, the standard time for coke oven reversing is 1800 seconds, which is synchronized with the reversing machine time in the reversing cabinet. After each reversing is completed, the reversing machine resets the timing. During the coke oven switching process, when the reversing machine times to 1790 seconds, the main pressure control system automatically pre-closes the regulating valve 5, that is, reduces the valve position opening of the regulating valve 5 by 5%, and correspondingly reduces the pressure of the transmitter 9 after the valve, which lasts for 30 seconds until the reversing process is completed to resist the peak value of the gas pressure during reversing. After 30 seconds, the valve position of the regulating valve 5 returns to normal to ensure the safety of the coke oven.

[0029] The control device is connected to the blast furnace 1 gas main pressure control system, and the PID (Packet Identifier) ​​parameters are set, and the regulating device will automatically switch in the control system. The operator only needs to press the automatic button to put the control device into the pressure regulation system before the blast furnace gas is directly supplied to the coke oven for heating during the gas cabinet maintenance. Through the pressure control system configuration, the regulating device is switched before the pressure fluctuates, and the regulating valve 5 is pre-closed for pressure stabilization. The operation is simple, safe and reliable. When the blast furnace 1 gas fluctuates in the first pipeline 3, the gas pressure entering the coke oven 2 can be guaranteed to be stable, the safety of the coke oven 2 is guaranteed, and the production is ensured to be carried out in an orderly manner.

[0030] Further, in order to ensure effective regulation of the coal gas entering the coke oven 2, the regulating device includes a regulating valve 5, which is installed on the pipeline of the first pipeline 3. The regulating valve 5 is electrically connected to the control device, one end of the regulating valve 5 is connected to the outlet of the blast furnace 1, and the other end is connected to the inlet of the coke oven 2. The amount of coal gas delivered from the blast furnace 1 to the coke oven is regulated to reduce the fluctuation of the amount of coal gas entering the coke oven 2, thereby stabilizing the pressure of the first pipeline 3. The regulating valve 5 in the embodiment of the present invention is preferably a pneumatic regulating valve. The DN1400 pneumatic regulating valve is installed on the first pipeline 3 to stabilize the pressure of the coal gas delivered from the blast furnace 1 to the coke oven 2. The DN1400 pneumatic control valve is in automatic state on site and can be freely adjusted through the control device. The pneumatic control valve uses compressed air as the power source and the cylinder as the actuator. It uses electrical valve positioners, converters, solenoid valves, position-holding valves and other accessories to drive the valve to achieve switching quantity or proportional regulation. It receives control signals from industrial automation control systems to complete the regulation of pipeline media. The use of pneumatic control valves is simple to control and has a fast response. Since coal gas is a flammable and explosive gas, the use of pneumatic control valves avoids the generation of electric sparks and ensures safe production.

[0031] Furthermore, in order to reduce gas fluctuations and reduce the impact of gas on the regulating valve 5, the present invention is provided with a venting device, which includes a pre-valve venting valve 6, a post-valve venting valve 7 and an exhaust pipe 10. The pre-valve venting valve 6 is arranged on the pipeline of the second pipeline 4 and is located upstream of the regulating valve 5, and is used to release the gas pressure discharged from the blast furnace 1, that is, the pressure before the regulating valve 5, to reduce the impact of the gas pressure on the regulating valve 5. The post-valve venting valve 7 is arranged on the pipeline of the second pipeline 4 and is located downstream of the regulating valve 5, and is used to release the gas pressure after passing through the regulating valve 5; one end of the exhaust pipe 10 is connected to the second pipeline 4, and the other end extends to the atmosphere, so as to discharge the gas released by the pre-valve venting valve 6 and the post-valve venting valve 7.

[0032] like Figure 2As shown, the pre-valve relief valve 6 in the embodiment of the present invention is installed between the regulating valve 5 and the outlet of the blast furnace 1, and the post-valve relief valve 7 is installed between the regulating valve 5 and the inlet of the coke oven 2. The relief valve is a safety warning device for pipeline transportation of flammable and explosive gases. When the pressure of the control point exceeds the set value for some reason, a certain amount of gas is discharged. The preset pressures of the pre-valve relief valve 6 and the post-valve relief valve 7 are specifically set according to the pressure of the first pipeline 3. Since the gas pressure output by the blast furnace 1 is relatively high, the pre-valve relief valve 6 performs the first gas release according to the pressure of the first pipeline 3. The upper limit of the opening of the pre-valve relief valve 6 is set to 10%, and the pressure value is set to be 1 kPa more than the normal value of the pre-valve transmitter 8. Here, the normal value of the pre-valve transmitter 8 is limited to be less than or equal to 9 kPa. When the pressure value of the pre-valve transmitter 8 is displayed to be greater than or equal to 10 kPa, the pressure value of the pre-valve transmitter 8 is set to be less than or equal to 10 kPa. When the gas pressure is less than or equal to 10 kPa, the front-valve relief valve 6 is closed. After the gas is released, it passes through the regulating valve 5 and enters the coke oven. The rear-valve relief valve 7 is released for the second time according to the preset gas pressure after the regulating valve 5. The upper limit of the opening of the rear-valve relief valve 7 is set to 10%. The pressure value is set to 2 kPa more than the normal value of the rear-valve transmitter 9. Here, the normal value of the rear-valve transmitter 9 is limited to less than or equal to 5 kPa. When the pressure value of the rear-valve transmitter 9 shows greater than or equal to 7 kPa, the rear-valve relief valve 7 releases the gas. When the gas pressure is less than or equal to 7 kPa, the rear-valve relief valve 9 is closed. At the same time, the regulating valve 5 is automatically adjusted according to the rear-valve pressure. The parameter information of the valve and the post-valve release valve 9 are all set and controlled through PID to realize the automation of gas release. After the gas is released twice, the fluctuation of the gas generation amount is reduced, and the pressure of the gas entering the coke oven 2 is stabilized. The gas released by the valve front release valve 6 and the valve post-release valve 7 located at both ends of the regulating valve 5 is discharged to the atmosphere through the exhaust pipe 10. In order to avoid the occurrence of accidents, the exhausted gas is burned. The combustion treatment device for gas is a prior art, so it will not be introduced in detail here.

[0033] Furthermore, in order to better monitor the pressure of the coal gas before and after the regulating valve 5, the present invention is provided with a monitoring device, which includes a pre-valve transmitter 8 and a post-valve transmitter 9. The pre-valve transmitter 8 is arranged on the first pipeline 3 and is located upstream of the regulating valve 5, specifically installed between the pre-valve relief valve 6 and the regulating valve 5, and is used to monitor the pressure of the coal gas before passing through the regulating valve 5; the post-valve transmitter 9 is arranged on the first pipeline 3 and is located downstream of the regulating valve 5, specifically installed between the post-valve relief valve 7 and the regulating valve 5, and is used to monitor the pressure of the coal gas after passing through the regulating valve 5; during the adjustment process, the regulating valve 5 is adjusted according to the pressure of the post-valve transmitter 9, and the pressure of the post-valve transmitter 9 is stabilized between 4.3-6.8 kPa. (For example: 4.8kPa, 5.3kPa, 5.8kPa, 6.3kPa), the valve front transmitter 8 and the valve post transmitter 9 in the embodiment of the present invention are preferably pressure gauges, and the pressure gauges are installed on the first pipeline 3. The pressure gauges can be used to intuitively observe the pressure changes before and after the regulating valve 5 so that the regulating valve 5 can be opened and closed in time.

[0034] Furthermore, in order to facilitate observation and operation of the regulating system, the present invention is also provided with a control device, which includes a DCS (Distributed Control System) screen control panel 11. The states of the regulating device, the venting device and the monitoring device are all presented on the DCS screen control panel 11. The regulating system is incorporated into the first pipeline pressure control system of blast furnace gas without adding equipment. The DCS screen control panel 11 is provided with buttons for changing the operating state of the regulating system. When the gas holder is under maintenance, the blast furnace 1 gas is directly supplied to the coke oven 2 before heating through the buttons on the DCS screen control panel 11. After the PID parameters are set, the regulating valve 5 is automatically adjusted throughout the process without manual operation. The operation is simple, the manufacturing cost is low, and the system is safe and reliable, thereby improving the safety factor.

[0035] Furthermore, in order to ensure safe production, the maximum valve position opening of the regulating valve 5 is 60%. In order to ensure the continuity of production, the minimum valve position opening of the regulating valve 5 is 25%. Under normal circumstances, that is, after the regulating valve 5 regulates the gas, the gas pressure is stabilized, and the gas pressure during the non-reversing time is between 4.5-5.0 kPa (for example: 4.6 kPa, 4.7 kPa, 4.8 kPa, 4.9 kPa), and the valve position opening of the regulating valve 5 is 40%.

[0036] Specifically, taking the setting of 1# coke oven and 2# coke oven as an example, the conditions are confirmed before operation, and the buttons on the DCS screen control panel 11 are confirmed to be in the automatic state. The 1# coke oven valve position automatic control button and the 2# coke oven valve position automatic control button are put into the automatic state, indicating that the reversing signal is automatically received, and the regulating valve 5 is automatically pre-closed according to the value set by the blast furnace gas valve position locking button 16. The 1# coke oven reversing time setting button 14 and the 2# coke oven reversing time setting button 15 are used to track the reversing time 10 seconds before the formal reversal, and the regulating valve 5 is given an operation instruction. The blast furnace 1 gas process is blast furnace-pressure regulating valve-coke oven, and the on-site regulating valve 5 is in the automatic switching state. The 1# coke oven reversing time setting button 14 and the 2# coke oven reversing time setting button 15 are operated to set the reversing time for 1# coke oven and 2# coke oven respectively. The 1# coke oven valve position automatic control button 12 is put into the DCS screen control panel 11, and the blast furnace 1 gas passes through the valve front release valve 6 Release, adjust the output gas volume through the regulating valve 5, and then release it through the valve rear release valve 7. The regulating valve 5 is automatically adjusted according to the valve rear pressure. When the gas volume is large, the regulating valve 5 is closed. When the gas volume does not reach the preset pressure, that is, the gas pressure is less than the preset pressure, the regulating valve 5 is opened to increase the gas volume passing through the regulating valve 5. The reversing time of coke oven 2 is once every 1800 seconds. This time is configured into the regulating system on the DCS program of the pressure control system to collect time. After the 1# coke oven 2 is stabilized for safe production, the blast furnace gas valve position locking button 16 locks the regulating valve 5. The blast furnace gas valve position locking time is set by the blast furnace gas valve position locking time setting button 17. The setting is performed to avoid misoperation of the regulating valve 5 in the production process. When the 1# coke oven reaches the preset reversing time, the DCS screen control panel 11 automatically activates the 2# coke oven valve position automatic control button 13. 10 seconds before the 2# coke oven is switched, the valve position of the regulating valve 5 is pre-closed from 40% to 35%. The setting of 10 seconds in advance is performed by the pressure control system on the premise of setting the reversing time of the 1# coke oven and the 2# coke oven. When the coke oven 2 is switched, the valve position of the regulating valve 5 is pre-closed to 35% and maintained for 30 seconds until the reversing process is completed. After the pressure after the valve and the terminal pressure are stable, the valve position of the regulating valve 5 is restored to 40%. In this way, the smoothness of the reversal is guaranteed and a large gas fluctuation is avoided. The fluctuation range of the gas pressure after the reversal is less than 3kPa during the timed reversal of the coke oven 2, and the peak fluctuation range at the end of the coke oven is less than 500Pa, which effectively ensures the stability of the gas pressure entering the coke oven 2, ensures the safety of the coke oven, and ensures the effective production.

[0037] In summary, the present invention provides a blast furnace gas main pressure regulating system for a coke oven. The regulating system is connected to the blast furnace 1 gas main pressure control system. Through the DCS system configuration, the regulating valve 5 is reversed, and the regulating valve 5 is pre-closed before the pressure fluctuates to perform a pressure stabilizing operation. The operation is simple, safe and reliable, and the pressure of the gas entering the coke oven 2 is guaranteed to be stable, the safety of the coke oven 2 is guaranteed, and the production is guaranteed to be carried out in an orderly manner. The buttons for controlling the coke oven are automatically put into operation through the DCS screen control panel 11, and the control is fully automatic without manual operation, which reduces the impact of the pressure fluctuation in the pipeline on the regulating valve 5, reduces the operation frequency of the regulating valve 5, increases the service life of the regulating valve 5, and reduces the production cost. The control method is diversified, and the pressure after the valve can be stabilized for a long time. The gas is released twice through the pre-valve release valve 6 and the post-valve release valve 7, which reduces the fluctuation of the gas generation amount, and stabilizes the pressure of the gas entering the coke oven 2 to achieve an ideal pressure stabilizing effect.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A blast furnace gas main pressure regulating system for a coke oven, characterized in that: The regulating system comprises: A regulating device, which is arranged on the pipeline of the first pipeline and is located downstream of the blast furnace and upstream of the coke oven, and is used to regulate the coal gas supplied from the blast furnace to the coke oven; a dispersing device, the dispersing device being arranged on a pipeline of a second pipeline, the second pipeline being in communication with the first pipeline and being located on one side of the first pipeline, the dispersing device being used to disperse the coal gas in the first pipeline; A monitoring device, which is arranged on the first pipeline and is used to monitor the gas pressure of the first pipeline; A control device, the control device is electrically connected to the regulating device and is used to control the opening and closing of the regulating device; The regulating device comprises: A regulating valve, the regulating valve is arranged on the pipeline of the first pipeline, one end of the regulating valve is connected to the outlet of the blast furnace, and the other end is connected to the inlet of the coke oven, and is used to adjust the amount of gas transported from the blast furnace to the coke oven; The dispersing device comprises: A pre-valve relief valve, which is arranged on the pipeline of the second pipeline and located upstream of the regulating device, and is used to release the gas pressure discharged from the blast furnace; The dispersing device also includes: a post-valve relief valve, which is arranged on the pipeline of the second pipeline and is located downstream of the regulating device, and is used to release the gas pressure after passing through the regulating device; The monitoring equipment includes: a pre-valve transmitter, which is arranged on the first pipeline and upstream of the regulating device, and is used to monitor the pressure of the gas before it passes through the regulating device; a post-valve transmitter, which is arranged on the first pipeline and downstream of the regulating device, and is used to monitor the pressure of the coal gas after passing through the regulating device; The normal opening amount of the regulating valve is 40%, the upper limit of the valve position opening of the regulating valve is 60%, and the lower limit is 25%. 10 seconds before the coke oven is switched, the valve position of the regulating valve is pre-closed from 40% to 35%, and maintained for 30 seconds until the switching process is completed.

2. The blast furnace gas main pressure regulating system for coke oven according to claim 1, characterized in that: The regulating valve is a pneumatic regulating valve.

3. The blast furnace gas main pressure regulating system for coke oven according to claim 1, characterized in that: The dispersing device also includes: An exhaust pipe, one end of which is connected to the second pipeline, and the other end of which extends to the atmosphere to discharge the coal gas released by the release device.

4. The blast furnace gas main pressure regulating system for coke oven according to claim 1, characterized in that: The control device comprises a DCS screen control panel, and the states of the regulating device, the releasing device and the monitoring device are all presented on the DCS screen control panel; The DCS screen control panel is provided with buttons, and the state of the regulating device can be changed by controlling the buttons.

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