Temporary solution for insufficient flow caused by blockage of water supply pipe of rotational flow well

Abstract

The invention relates to the technical field of steel rolling turbid circulating water treatment systems in the ferrous metallurgy industry, and particularly discloses a temporary solution for insufficient flow caused by blockage of a rotational flow well water supply pipe. A deslagging pipe is additionally arranged for dredging and deslagging; the vertical pipe is dredged through back flushing and mechanical stirring; monitoring the flow in real time and testing the standby pump in a linkage manner; according to the temporary solution for insufficient flow caused by blockage of the water supply pipe of the rotational flow well, the hidden danger treatment efficiency is improved, the hidden danger treatment time can be effectively prolonged, and the cost of unplanned long-time shutdown treatment is reduced; the hidden danger of insufficient water supply flow caused by oxide scale blockage is treated by temporary shutdown with the shutdown duration less than or equal to 6 hours, non-planned long-time shutdown is avoided, and the hidden danger treatment cost is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment in the metal smelting industry, and in particular to a temporary solution to insufficient flow caused by blockage of a vortex well water supply pipe. Background Art

[0002] Internal vortex wells are generally divided into an inner well and an outer well. Some internal vortex wells can be further divided into two sections to better precipitate and capture scale. Generally speaking, the inner and outer wells are not connected. The inner well is used to precipitate scale. After precipitation, the turbid circulating water flows through an overflow weir into the outer well. Water from the outer well is then pumped by a large submersible pump to the next treatment process.

[0003] The iron oxide scale dropped by the rolling mill enters the vortex well through the slag ditch. When the return water pipe of the slag ditch is damaged, a large amount of iron oxide scale directly enters the outer well of the vortex well, causing a sharp increase in the iron oxide scale in the outer well. It enters the delivery pipeline with the lifting pump, gradually blocking it and causing the water supply flow to decrease. Ultimately, the liquid level in the vortex well cannot be controlled, causing the water level to rise and the machine to be shut down for treatment.

[0004] The traditional method is to be forced to shut down the machine, clean up the accumulated residue and then resume water supply; but even if a temporary shutdown of ≤6 hours is used to clear the pipeline, the pipeline will still be blocked after restarting the machine, and a temporary shutdown of more than 5 days can only be taken to thoroughly deal with the leak and clean the iron oxide scale; if the underground vertical pipe is blocked, since the vertical pipe is suspended between the bottom of the well and the platform, the distance between the top and the bottom exceeds 10 meters, the difficulty and time of clearing the pipeline will increase exponentially.

[0005] Unplanned temporary shutdown of a steel rolling production line for more than 5 days will result in huge production losses. Therefore, a temporary solution is needed to solve the problem of insufficient flow caused by blockage of the vortex well water supply pipe. The solution can be used to deal with hidden dangers without stopping the production line or with a temporary shutdown time of ≤ 6 hours, thus avoiding production losses caused by long-term shutdown. Summary of the Invention

[0006] In response to the problems existing in the prior art, the purpose of the present invention is to provide a temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe. Its purpose is to be able to deal with the hidden danger without stopping the machine or using a temporary shutdown time of ≤6 hours when the vortex well water supply lifting pipeline is blocked by iron oxide scale, resulting in insufficient flow and inability to effectively control the vortex well water level, to ensure that the hidden danger treatment can be extended to the implementation of a planned shutdown to completely resolve the problem, thereby avoiding production losses caused by traditional unplanned long-term (≥5 days) shutdown for leak plugging and cleaning.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a temporary solution to the problem of insufficient flow caused by blockage of the water supply pipe of the vortex well, comprising the following steps:

[0008] S1. Restore flow according to blockage situation: When the water supply flow is low, it is necessary to determine whether the low flow is caused by iron oxide scale blockage in the water supply pipeline;

[0009] S2. Add a slag discharge pipe and clear the slag discharge: Add a slag discharge pipe below the lift pump water supply pipe, and select a suitable valve for the slag discharge pipe outlet valve based on the bottom space of the water supply pipe;

[0010] S3. Clear the vertical pipe by backflushing and mechanical agitation: When the standby pump resumes water supply, remove the check valve disc blocking the pipe outlet to ensure that the water flow can be reversed and backflushed;

[0011] S4. Real-time flow monitoring and joint testing of standby pumps: Monitor the water supply flow of the running pump group in real time, record the flow data, and analyze the flow change trend; analyze the blockage of the water supply pipeline based on the flow change trend, and clear it in time.

[0012] Specifically, the water supply pipe in step S1 is judged by knocking. If the knocking sound is dull, it means that the water supply pipe is blocked by iron oxide scale, resulting in low flow rate;

[0013] When it is determined that the pipe is blocked by iron oxide, the water supply flow of the water supply main is restored by starting the standby pump;

[0014] If the flow is restored after the standby pump is turned on, proceed to the next step; if the flow is not restored after the standby pump is turned on, and there is a dull knocking sound in the standby pump water supply pipeline, the standby pump water supply pipeline is also blocked by iron oxide. At this time, a temporary shutdown of ≤6 hours is required to disassemble the valves and short pipe components to clean the iron oxide in the pipeline. After cleaning and unblocking, restart the standby pump to supply water.

[0015] Specifically, in step S2, if shutdown is allowed for the installation of the slag discharge pipe, welding is performed after shutdown; if shutdown is not allowed, installation is performed using a pipeline pressure opening device.

[0016] Specifically, after the slag discharge pipe is installed, the slag discharge operation is performed, and the specific steps are:

[0017] S21. Open the valve to 10% of its opening to discharge slag. During the discharge process, use an impact tool to knock on the water supply pipe to facilitate the rapid discharge of iron oxide scale.

[0018] S22, after discharging a uniform water flow, increase the opening to 30% to continue discharging slag, and close it after discharging for 1-2 minutes;

[0019] S23, repeat steps S21 and S22 2-3 times;

[0020] S24. Close the valve of the slag discharge pipe, connect the slag discharge pipe with a metal hose or other wear-resistant pipe, and lay the hose into the inner well of the vortex well;

[0021] S25. After the pipeline is laid, open the slag discharge pipe valve and observe the slag and water discharge. If a mixture of iron oxide and water can flow out evenly, it is OK.

[0022] S26: If the water and slag discharge are uneven, it is necessary to determine whether the slag discharge pipe is blocked. If blocked, it needs to be cleared and dredged, and steps S24 and S25 are repeated until the water and slag discharge are uniform.

[0023] S27. Perform the same operation on the main lifting pipe of the vortex well, and add a slag discharge pipe at a suitable position near the bottom of the main lifting pipe to ensure that the water and slag in the pipe are evenly discharged.

[0024] Specifically, the specific steps of unclogging the vertical pipe in step S3 are:

[0025] S31. Open the blocked standpipe outlet valve. If there are multiple standpipe outlet valves, only keep one valve open and keep the other valves fully open. Adjust the opening of the standpipe outlet valve to 15%-30%, and tap the elbow of the standpipe on the platform. If flow is restored, it means that the blocked iron oxide scale has fallen off, and the standpipe is unobstructed.

[0026] S32. If the flow is not restored, continue to increase the opening of the standpipe outlet valve until it is fully open to 100%. If the flow is restored, close the standpipe outlet valve in time to avoid water flow loss.

[0027] S32. If the flow rate is not restored, close the vertical pipe outlet valve and open a window at the vertical pipe elbow. The opening width should not exceed 50% of the pipe diameter and the length should not exceed 2 / 3 of the outer arc diameter of the elbow. Prepare a small submersible pump and ensure that the submersible pump is large enough to fit into the window. Set up a gantry and place the submersible pump into the window using a fall chain.

[0028] Specifically, the submersible pump needs to be modified by adding a long-axis rotating blade to the rotating shaft of the submersible pump impeller. The length of the blade needs to ensure that it can extend out of the impeller and is reinforced by welding or other means; the long-axis blade has a blade with a long rotating shaft and is used for rotational stirring; the submersible pump with a long-axis blade is placed in the window through the gantry, and the outlet valve opening is adjusted to 5% to ensure that water can flow into the vertical pipe. At the same time, the submersible pump with a long-axis blade is turned on, and the blocked iron oxide scale is stirred by the rotation of the blade, and the water and the stirred iron oxide scale are pumped away by the submersible pump to achieve the purpose of unblocking the blockage; during use, the opening of the vertical pipe outlet valve and the position of the submersible pump are dynamically adjusted to ensure that the iron oxide scale can be sucked away until the vertical pipe is unblocked.

[0029] Specifically, the water discharge from the slag discharge pipe of the water supply pipeline in step S4 is regularly monitored, and spot checks are carried out every shift to observe the uniformity and color of the water discharge. If the water discharge is uneven, the pipe should be considered blocked and unblocked in time; if the water discharge color is black, the iron oxide scale content at the bottom of the well should be considered to have increased, and the water supply flow should be monitored in time;

[0030] Start the standby pump regularly to test the flow rate and observe whether the flow rate increases significantly after the standby pump is started. If the flow rate is low, it is considered that the accumulation of iron oxide scale at the bottom of the well has increased and needs to be cleaned.

[0031] The present invention has the following beneficial effects:

[0032] The temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe designed in the present invention improves the efficiency of hidden danger treatment, can effectively extend the hidden danger treatment time, and reduces the cost of unplanned long-term shutdown treatment.

[0033] The present invention is a temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe. The temporary shutdown with a shutdown time of ≤6 hours is used to deal with the hidden danger of insufficient water supply flow caused by iron oxide scale blockage, thereby avoiding unplanned long-term shutdown and effectively reducing the cost of hidden danger treatment.

[0034] The invention is a temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe. It is a treatment method for elevated suspended pipelines with low treatment cost, good effect and low implementation difficulty.

[0035] The present invention is a temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe. By establishing a regular monitoring test and maintenance inspection and adjustment mechanism, the hidden dangers of pipeline blockage can be continuously tracked and resolved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the vortex well structure.

[0037] Figure 2 It is a structural diagram of a submersible pump with a long-axis rotating agitator.

[0038] Figure 3 This is the front view of a submersible pump with a long-shaft rotating agitator.

[0039] Figure 4 This is a flow chart of a temporary solution to insufficient flow caused by blockage of the vortex well water supply pipe.

[0040] In the figure: 1-swirl well lifting pump, 2-vertical pipe, 3-water supply branch pipe, 4-water supply main pipe, 5-slag discharge pipe, 6-submersible pump with long-axis rotating agitator, 7-inner well railing, 101-lifting pump foundation, 301-check valve, 302-manual butterfly valve, 303-electric butterfly valve, 304-check valve support, 305-branch pipe bracket, 601-long-axis rotating agitator. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] like Figure 1 As shown, the vortex well lift pump 1 selected in this embodiment is located at -22 meters below the well bottom and is installed on the lift pump foundation 101 at the well bottom. The water supply branch pipe 3, with a diameter of DN400mm, is located at the -12m platform. A branch pipe bracket 305 is installed at the base of the water supply branch pipe 3 and is fixedly mounted on the platform. A vertical pipe 2 is located between the well bottom and the platform. The outlet valves are a check valve 301, a manual butterfly valve 302, and an electric butterfly valve 303. The check valve 301 is mounted on the platform via a check valve support 304. A slag discharge pipe 5 is installed on the water supply branch pipe 3, which connects to the water supply main 4. The water supply pump group is arranged in a four-unit layout, operating in a three-in-use, one-in-standby mode. An inner well guardrail 7 is installed at the upper opening of the central inner well.

[0043] like Figure 4 As shown, a temporary solution to insufficient flow caused by blockage of the vortex well water supply pipe includes four parts: restoring the flow according to the blockage situation; unblocking the vertical pipe through backwashing and mechanical agitation; adding a slag discharge pipe and unblocking the slag discharge; real-time monitoring of the flow and linkage testing of the standby pump.

[0044] 1. Restoring traffic flow based on congestion conditions includes:

[0045] The water flow rate of the vortex well should be 800m under normal circumstances. 3 / h-1000m 3 / h, when the water supply flow is found to be low at 700m 3 / h or less, the water level in the vortex well continues to increase, indicating that the water supply flow is insufficient. Use an impact tool to knock on the water supply branch pipe 3 and the water supply main pipe 4 to determine whether the water supply pipeline is blocked. When the knocking sound of the pipeline is crisp, the low flow is not caused by iron oxide blockage; when the knocking sound is dull, the low flow is caused by iron oxide blockage of the water supply pipeline.

[0046] When it is determined that the pipeline is blocked by iron oxide, the water supply flow of the water supply main is restored by turning on the backup pump.

[0047] If the flow is restored after the standby pump is turned on, a slag discharge pipe will be added and the slag discharge steps will be carried out; if the flow is not restored after the standby pump is turned on, and there is a dull knocking sound in the standby pump water supply pipeline, the standby pump water supply branch pipe is also blocked by iron oxide. At this time, a temporary shutdown of ≤6 hours is required to disassemble the outlet valves 301-303, connecting short pipes and other components to clean the iron oxide in the pipeline. After cleaning and unblocking, restart the standby pump water supply.

[0048] 2. Adding a slag discharge pipe and clearing the slag discharge specifically includes:

[0049] A slag discharge pipe 5 is added below the lift pump water supply branch pipe 3, and a butterfly valve or a ball valve is selected as the control valve for the slag discharge pipe outlet valve according to the bottom space of the water supply pipe.

[0050] If there is no slag discharge pipe, if shutdown is allowed, it can be opened and welded after shutdown; if shutdown is not allowed, pipeline pressure opening equipment can be used for installation. Pipeline pressure opening equipment is conventional equipment and can be opened when there is pressure medium in the pipeline. The characteristics of the equipment and usage methods will not be described in detail.

[0051] After the slag discharge pipe 5 is installed, open the control slag discharge pipe valve, and the slag discharge pipe valve opening degree is 10% to discharge the slag. During the slag discharge process, use an impact tool to knock the water supply branch pipe 3 to facilitate the rapid discharge of iron oxide scale and prevent clogging of agglomerated iron oxide scale.

[0052] After evenly discharging water and iron oxide, increase the opening of the slag discharge pipe valve to 30% to continue discharging slag. Continue discharging for 1-2 minutes and then close it.

[0053] Repeat the above operation 2-3 times to prevent the uneven falling of the oxidized iron scale in the pipe, which will cause the oxidized iron scale to be incompletely discharged and clog the slag discharge pipe.

[0054] Close the slag discharge pipe valve, use a metal hose or other wear-resistant pipe to connect the slag discharge pipe, and lay the hose to the inner well or middle well of the vortex well to ensure that the discharged iron oxide scale no longer enters the outer well.

[0055] After the pipeline is laid, open the slag discharge pipe and control the slag discharge pipe valve to observe the discharge of iron oxide and water. If the mixture of iron oxide and water can flow out evenly, it is sufficient.

[0056] If the water and slag discharge is uneven or no discharge occurs, it is necessary to determine whether the pipeline is blocked. If blocked, it needs to be cleaned and unblocked, and the above steps should be repeated until the iron oxide and water are discharged evenly.

[0057] The same operation is performed on the main pipe of the vortex well lift, and a slag discharge pipe and a control valve are added at a suitable position near the bottom of the pipeline to ensure that the water and slag in the pipeline are discharged evenly.

[0058] 3. Clearing the vertical pipe by backwashing and mechanical agitation specifically includes:

[0059] When the standby pump resumes water supply, the valve plate of the check valve 301 at the outlet of the water supply branch pipe 3 is removed to release the check function of the valve and ensure that the water flow can flow back to the vertical pipe 2 for backwashing.

[0060] Adjust the opening degree of the outlet valve of the blocked vertical pipe 2. If there are multiple vertical pipe outlet valves, such as Figure 1 There are a manual butterfly valve 302 and an electric butterfly valve 303 at the outlet valve. Only one manual valve 302 is retained for adjustment. The electric butterfly valve 303 is kept in a 100% fully open state. The opening degree of the manual valve 302 is adjusted to 15%-30% to ensure that the water flow of the standby pump can enter the branch pipeline of the blocked pump group, and knock on the elbow part of the vertical pipe 2 on the platform. If the water supply flow decreases and the knocking sound changes from dull to crisp, it means that the blocked iron oxide scale has fallen and the flow of the blocked pump group can be restored;

[0061] If the blockage is not cleared, continue to increase the opening of the manual valve 302 until it is fully open to 100%. If the blockage is restored, close the outlet valve in time to avoid water flow loss.

[0062] If it is still not unblocked, close the manual valve 302 and use a gas cutting tool or other cutting tool to open a window at the elbow of the vertical pipe 2. The opening width shall not exceed 50% of the pipe diameter and the length shall not exceed 2 / 3 of the outer arc diameter of the elbow. Prepare a small submersible pump 6, ensure that the submersible pump 6 and the connecting pipeline can be placed in the vertical pipe 2, and set up a gantry to place the submersible pump 6 into the vertical pipe opening using a fall chain.

[0063] like Figure 2-Figure 3 As shown, the small submersible pump 6 needs to have stirring ability, which is achieved by modifying the ordinary submersible pump, specifically by adding a long-axis rotating agitator 601 to the impeller rotating shaft. The length of the rotating shaft needs to ensure that the agitator can extend out of the impeller, and it is reinforced to the impeller rotating shaft by welding or other means to ensure that the long-axis rotating agitator 601 can rotate with the impeller.

[0064] The long-axis rotating stirring blade 601 is a common tool having a stirring blade with a long rotating shaft and is used for rotating stirring.

[0065] The submersible pump 6 with a long-axis rotating stirring blade 601 is placed into the window through the gantry, and the opening degree of the outlet valve 301 is adjusted to 5% to ensure that the water flow from the water supply main 4 can enter the vertical pipe 2. At the same time, the submersible pump 6 with a long-axis rotating stirring blade is turned on, and the blocked iron oxide scale is stirred and dispersed by the rotation of the stirring blade 601, and the water and the stirred iron oxide scale are pumped away by the submersible pump impeller to achieve the purpose of unblocking the blockage; during use, it is necessary to dynamically adjust the opening degree of the manual valve 302 and the position of the submersible pump 6 to ensure that there is water in the vertical pipe 2 at all times to prevent the submersible pump 6 from sucking out water and being unable to transport iron oxide scale, and the water volume in the vertical pipe 2 should not be at a high opening position to avoid overflow from the window; at the same time, observe the output of the water outlet pipe of the submersible pump 6. When there is no iron oxide scale at the outlet of the submersible pump 6, it is necessary to lower the submersible pump 6 with a fall chain until the vertical pipe 2 is unblocked. During the adjustment process, the fall chain should be kept under force to prevent the long-axis rotating stirring blade 601 from being damaged by force.

[0066] 4. Real-time flow monitoring and linkage testing of standby pumps include:

[0067] Monitor the water supply flow of the running pump group in real time, record the flow data, and analyze the flow change trend; analyze the blockage of the water supply pipeline according to the flow change trend, and clear it in time.

[0068] Regularly monitor the water discharge from the slag discharge pipe under the water supply branch pipe, conduct on-site inspections every 4 hours, and observe the uniformity and color of the water discharge. If uneven water discharge occurs, consider that the pipeline is blocked and clear it in time; if the water color is black, consider that the iron oxide content at the bottom of the well has increased, and monitor the water supply flow in time.

[0069] Start the standby pump regularly every 12 hours to test the flow rate and observe whether the flow rate increases significantly after the standby pump is started. Under normal circumstances, the water supply flow rate should be 800m 3 / h-1000m 3 / h, can reach 1200m after turning on the standby pump 3 / h or more. If the flow rate is too low, it is considered that the accumulation of iron oxide scale at the bottom of the well has increased, resulting in insufficient water supply flow from the standby pump, and cleaning is required.

[0070] In summary, the method proposed in the present invention solves the problem of insufficient flow caused by iron oxide scale blockage by temporary shutdown without stopping the machine or with a shutdown time of ≤6 hours. Unlike the traditional forced shutdown treatment method, it provides a new, efficient and economical option for an uncommon problem in the actual operation of vortex wells.

[0071] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

[0072] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. A temporary solution to the problem of insufficient flow caused by blockage of the water supply pipe of the vortex well, characterized by: The following steps are involved: S1. Restore flow according to blockage situation: When the water supply flow is low, it is necessary to determine whether the low flow is caused by iron oxide scale blockage in the water supply pipeline; S2. Add a slag discharge pipe and clear the slag discharge: Add a slag discharge pipe below the lift pump water supply pipe, and select a suitable valve for the slag discharge pipe outlet valve based on the bottom space of the water supply pipe; S3. Clear the vertical pipe by backflushing and mechanical agitation: When the standby pump resumes water supply, remove the check valve disc blocking the pipe outlet to ensure that the water flow can be reversed and backflushed; S4. Real-time flow monitoring and linkage testing of standby pumps: Monitor the water supply flow of the running pump group in real time, record the flow data, and analyze the flow change trend; Analyze the blockage of water supply pipelines according to the flow change trend and clear them in time.

2. The temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe according to claim 1, characterized in that: The water supply pipe in step S1 is judged by knocking. If the knocking sound is dull, it means that the water supply pipe is blocked by iron oxide scale, resulting in low flow; When it is determined that the pipe is blocked by iron oxide, the water supply flow of the water supply main is restored by starting the standby pump; If the flow is restored after the standby pump is turned on, proceed to the next step; if the flow is not restored after the standby pump is turned on, and there is a dull knocking sound in the standby pump water supply pipeline, the standby pump water supply pipeline is also blocked by iron oxide. At this time, a temporary shutdown of ≤6 hours is required to disassemble the valves and short pipe components to clean the iron oxide in the pipeline. After cleaning and unblocking, restart the standby pump to supply water.

3. The temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe according to claim 1, characterized in that: In step S2, if shutdown is allowed, the installation of the slag discharge pipe is performed after the shutdown; if shutdown is not allowed, the installation is performed using a pipeline pressure opening device.

4. The temporary solution to the problem of insufficient flow caused by blockage of the vortex well water supply pipe according to claim 3, characterized in that: After the slag discharge pipe is installed, the slag discharge operation is carried out. The specific steps are: S21. Open the valve to 10% of its opening to discharge slag. During the discharge process, use an impact tool to knock on the water supply pipe to facilitate the rapid discharge of iron oxide scale. S22, after discharging a uniform water flow, increase the opening to 30% to continue discharging slag, and close it after discharging for 1-2 minutes; S23, repeat steps S21 and S22 2-3 times; S24. Close the valve of the slag discharge pipe, connect the slag discharge pipe with a metal hose or other wear-resistant pipe, and lay the hose into the inner well of the vortex well; S25. After the pipeline is laid, open the slag discharge pipe valve and observe the slag and water discharge. If a mixture of iron oxide and water can flow out evenly, it is OK. S26: If the water and slag discharge are uneven, it is necessary to determine whether the slag discharge pipe is blocked. If blocked, it needs to be cleared and dredged, and steps S24 and S25 are repeated until the water and slag discharge are uniform. S27. Perform the same operation on the main lifting pipe of the vortex well, and add a slag discharge pipe at a suitable position near the bottom of the main lifting pipe to ensure that the water and slag in the pipe are evenly discharged.

5. The temporary solution to insufficient flow caused by blockage of the vortex well water supply pipe according to claim 1, characterized in that: The specific steps of unclogging the vertical pipe in step S3 are: S31. Open the blocked standpipe outlet valve. If there are multiple standpipe outlet valves, only keep one valve open and keep the other valves fully open. Adjust the opening of the standpipe outlet valve to 15%-30%, and tap the elbow of the standpipe on the platform. If flow is restored, it means that the blocked iron oxide scale has fallen off, and the standpipe is unobstructed. S32. If the flow is not restored, continue to increase the opening of the standpipe outlet valve until it is fully open to 100%. If the flow is restored, close the standpipe outlet valve in time to avoid water flow loss; S32. If the flow rate is not restored, close the vertical pipe outlet valve and open a window at the vertical pipe elbow. The opening width should not exceed 50% of the pipe diameter and the length should not exceed 2 / 3 of the outer arc diameter of the elbow. Prepare a small submersible pump and ensure that the submersible pump is large enough to fit into the window. Set up a gantry and place the submersible pump into the window using a fall chain.

6. The temporary solution to insufficient flow caused by blockage of the vortex well water supply pipe according to claim 5, characterized in that: The submersible pump needs to be modified, and a long-axis rotating stirring blade is added to the rotating shaft of the submersible pump impeller. The length of the stirring blade needs to ensure that it can extend out of the impeller and is reinforced by welding or other means; the long-axis stirring blade has a stirring blade with a long rotating shaft and is used for rotating stirring; the submersible pump with a long-axis stirring blade is placed in the window through the gantry, and the outlet valve opening is adjusted to 5% to ensure that water can flow into the vertical pipe. At the same time, the submersible pump with a long-axis stirring blade is turned on, and the blocked iron oxide scale is stirred by the rotation of the stirring blade, and the water and the stirred iron oxide scale are pumped away by the submersible pump to achieve the purpose of unblocking the blockage; during use, the opening of the vertical pipe outlet valve and the position of the submersible pump are dynamically adjusted to ensure that the iron oxide scale can be sucked away until the vertical pipe is unblocked.

7. The temporary solution to insufficient flow caused by blockage of the vortex well water supply pipe according to claim 1, characterized in that: The water discharge from the slag discharge pipe of the water supply pipeline in step S4 is regularly monitored, and spot checks are carried out every shift to observe the uniformity and color of the water discharge. If the water discharge is uneven, the pipe should be considered blocked and unblocked in time; if the water discharge color is black, the iron oxide content at the bottom of the well should be considered to have increased, and the water supply flow should be monitored in time; Start the standby pump regularly to test the flow rate and observe whether the flow rate increases significantly after the standby pump is started. If the flow rate is low, it is considered that the accumulation of iron oxide scale at the bottom of the well has increased and needs to be cleaned.

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