Automatic cleaning and safety guarantee method for ferrosilicon-containing wastewater conveying pipeline

Abstract

The invention relates to the technical field of chemical industry production wastewater treatment and conveying pipeline maintenance, and discloses an automatic cleaning and safety guarantee method for a ferrosilicon-containing wastewater conveying pipeline, which comprises a set of circulating system, the circulating system comprises a generator, a slurry pool, a supernatant pool and a wastewater conveying pipeline connected among the devices which are communicated in sequence; reacting calcium carbide with water in the generator to generate ferrosilicon-containing wastewater; conveying the ferrosilicon-containing wastewater in the slag slurry pool to the supernatant pool through a first wastewater conveying pipeline; and returning the ferrosilicon-containing wastewater in the supernatant tank to the generator through a second wastewater conveying pipeline. The circulating system comprising the generator, the slurry pool, the supernate pool and the conveying pipeline is constructed, scale on the inner wall of the pipeline is removed through the scouring friction effect generated when ferrosilicon particles in waste water flow along with water flow, cleaning equipment does not need to be additionally arranged, manual uncovering cleaning does not need to be carried out, meanwhile, waste water recycling is achieved, and the water resource utilization rate is increased.

Description

Technical Field

[0001] This invention relates to the field of chemical production wastewater treatment and pipeline maintenance technology, specifically an automatic cleaning and safety assurance method for silicon-iron wastewater pipelines. Background Technology

[0002] In the calcium carbide chemical production process, calcium carbide reacts with water in the generator to produce a product containing ferrosilicon. This product, discharged with wastewater, needs to be recycled and reused to improve water resource utilization and reduce pollution. During pipeline transportation, the ferrosilicon-containing wastewater carries ferrosilicon particles and other impurities that easily adhere to the inner wall of the pipeline, forming scale mainly composed of calcium carbonate and calcium hydroxide. Long-term accumulation of this scale gradually reduces the flow cross-section of the pipeline, increases transportation resistance, and leads to increased transportation energy consumption. In severe cases, it can even cause pipeline blockage or rupture, directly and adversely affecting the continuous and stable operation of production.

[0003] To address the issue of pipeline scaling, existing technologies typically employ periodic manual opening and cleaning, along with high-pressure cleaning. However, these methods present significant safety hazards: the working environment is complex, and many chemical media are corrosive. During manual opening and high-pressure cleaning, chemical leaks and injuries from contact with corrosive media are highly likely. Furthermore, this maintenance method incurs substantial labor costs, and the purchase and maintenance of high-pressure cleaning equipment incur additional expenses. Moreover, maintenance requires suspending production, further impacting overall production efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic cleaning and safety assurance method for silicon-containing iron wastewater conveying pipelines. This method solves the problems of existing silicon-containing iron wastewater conveying pipelines relying on manual opening of the cover or high-pressure cleaning for scaling removal, which poses high safety risks and is accompanied by high maintenance costs and affects production continuity.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic cleaning and safety assurance method for a silicon-iron wastewater conveying pipeline, comprising a circulation system, wherein the circulation system includes a generator, a slurry tank, a supernatant tank, and wastewater conveying pipelines connecting the various devices in sequence; the silicon-iron wastewater generated by the reaction of calcium carbide and water in the generator is discharged into the slurry tank via a slag discharge valve; the silicon-iron wastewater in the slurry tank is conveyed to the supernatant tank via a first wastewater conveying pipeline; the silicon-iron wastewater in the supernatant tank is returned to the generator via a second wastewater conveying pipeline, thereby completing the recycling of wastewater; During the wastewater recycling process, the scouring and friction generated by the silicon-iron particles carried in the silicon-iron wastewater flowing with the water in the first and second wastewater conveying pipelines are used to continuously remove scale adhering to the inner wall of the pipelines.

[0006] By adopting the above technical solution: A circulation system comprising a generator, slurry tank, supernatant tank, and conveying pipelines is constructed. The scouring and frictional action of ferrosilicon particles in the wastewater flowing with the water removes scale from the inner walls of the pipelines. This achieves wastewater recycling to improve water resource utilization, while eliminating the need for additional cleaning equipment and manual opening of the system, thus avoiding the safety risks of traditional cleaning methods. Simultaneously, by connecting a compressed air pipeline at the pump inlet to agitate the ferrosilicon particles, the system remains suspended, preventing pump and pipeline blockage and ensuring continuous system operation. Monitoring pipeline pressure and dynamically adjusting the amount of ferrosilicon added using a remote pressure transmission device balances the scale removal effect with pipeline wear, improving system stability. Installing wall thickness monitors at wear-prone sections of the pipeline provides real-time early warning, enabling timely detection of wear hazards and preventing leaks to enhance safety. Furthermore, the application of wastewater cooling treatment, interlocking level control, and wear-resistant pipelines protects equipment, maintains hydraulic balance, reduces maintenance costs, and extends the service life of equipment and pipelines.

[0007] Preferably, compressed air pipelines are connected to the slurry pump inlet of the slurry tank and the supernatant transfer pump inlet of the supernatant tank, respectively; compressed air is introduced into the compressed air pipelines to agitate and keep the silicon iron particles in a suspended state.

[0008] Preferably, the agitation method is intermittent agitation or continuous agitation; when intermittent agitation is used, the agitation cycle is 3-8 minutes every 25-35 minutes; the compressed air pressure range of the compressed air introduced into the compressed air pipeline is 0.3-0.5 MPa.

[0009] Preferably, the fluid pressure in the second wastewater delivery pipeline is monitored by a remote pressure transmission device installed at the outlet of the supernatant delivery pump, and the amount of ferrosilicon added to the system is dynamically adjusted according to the monitored pressure data to adjust the concentration of ferrosilicon particles in the wastewater.

[0010] Preferably, the dynamic adjustment specifically includes: increasing the amount of silicon iron added when the monitored pressure value is continuously higher than the first preset pressure threshold; and reducing the amount of silicon iron added when the monitored pressure value is continuously lower than the second preset pressure threshold or when abnormal fluctuations occur. The first preset pressure threshold is 0.55-0.65 MPa, and the second preset pressure threshold is 0.15-0.25 MPa.

[0011] Preferably, the dynamic adjustment of the amount of silicon iron added is performed by a silicon iron adding device.

[0012] Preferably, a wall thickness monitoring instrument is installed at the wear-prone parts of the first and second wastewater conveying pipelines to monitor the pipeline wall thickness and issue an early warning signal when the monitored wall thickness data is lower than a preset early warning threshold, so as to assess the real-time status of the pipeline structural integrity.

[0013] Preferably, the wear-prone parts include elbows, tees, diameter changes, and pipe sections that are in a high-flow-rate state for a long time; the warning threshold is set to 75-85% of the original pipe wall thickness.

[0014] Preferably, before the silicon-containing wastewater in the slurry tank is pumped to the supernatant tank, the silicon-containing wastewater needs to be cooled, and the temperature of the cooled wastewater is controlled at 30-40℃. The liquid level in the supernatant tank is controlled by interlocking the liquid level remote transmission in the supernatant tank with the outlet automatic control valve of the slurry pump, so as to maintain the hydraulic connection between the supernatant tank and the slurry tank.

[0015] Preferably, the particle size range of the silicon-iron particles in the silicon-iron wastewater is 0.1-1mm; the first wastewater conveying pipeline and the second wastewater conveying pipeline are made of wear-resistant material with smooth inner walls.

[0016] Working principle: First, the reaction between calcium carbide and water is completed in the generator. The generator provides a stable bearing space for the reaction to ensure its smooth progress. The silicon-iron wastewater produced after the reaction is discharged through the slag discharge valve. The slag discharge valve can regulate the wastewater discharge rhythm to avoid excessive discharge that would overload subsequent treatment. Finally, the silicon-iron wastewater is transported to the slurry tank. The slurry tank temporarily stores the wastewater and provides a cooling buffer space. The wastewater is first cooled to 30-40℃ to reduce its corrosiveness to the equipment. Then, with the power support of the slurry pump, the wastewater is transported to the supernatant tank through the first wastewater delivery pipeline. During this process, the liquid level at the supernatant tank is collected in real time by the remote transmission and is interlocked with the outlet automatic control valve of the slurry pump. The water delivery volume is controlled by adjusting the opening of the outlet automatic control valve to maintain the hydraulic balance between the supernatant tank and the slurry tank.

[0017] The wastewater is temporarily stored in the supernatant tank and further clarified. Then, under the power of the supernatant transfer pump, the wastewater is returned to the generator through the second wastewater transfer pipeline, completing the recycling of ferrosilicon-containing wastewater. During the entire circulation process, ferrosilicon particles with a diameter of 0.1-1mm in the wastewater flow with the water flow. With their own hardness, they continuously scour and rub against the inner walls of the first and second wastewater transfer pipelines, physically removing scale such as calcium carbonate and calcium hydroxide from the inner walls, thus achieving automatic cleaning of the pipelines. At the same time, the first and second wastewater transfer pipelines are made of wear-resistant material with smooth inner walls, which reduces flow resistance, reduces energy consumption, enhances resistance to scour, and slows down pipeline wear.

[0018] To prevent ferrosilicon particles from settling and clogging, compressed air at 0.3-0.5 MPa is introduced through compressed air pipelines at the inlet of the slurry pump and the supernatant transfer pump to agitate the particles. The agitation can be continuous or intermittent, thereby breaking the settling trend of ferrosilicon particles, maintaining their suspended state, and ensuring the stable operation of the power equipment.

[0019] Meanwhile, the remote pressure transmission device at the outlet of the supernatant transfer pump will monitor the pressure in the second wastewater transfer pipeline in real time. When the pressure is higher than 0.55-0.65MPa, it is determined that scaling is aggravated or the amount of ferric silica is insufficient. The amount of ferric silica added is increased through the ferric silica addition device to enhance the flushing effect. When the pressure is lower than 0.15-0.25MPa or fluctuates abnormally, it is determined that there is an excess of ferric silica. The amount of ferric silica added is reduced to avoid excessive wear of the pipeline and to achieve a dynamic balance between cleaning effect and pipeline wear.

[0020] In addition, wall thickness monitoring instruments are installed at wear-prone parts such as elbows and tees of the first and second wastewater conveying pipelines to collect wall thickness data in real time. When the data is lower than 75-85% of the original wall thickness of the pipeline, an early warning signal is issued to prompt staff to carry out timely maintenance and replacement, prevent pipeline leakage accidents, and ultimately ensure the long-term stable operation of the entire circulation system.

[0021] This invention provides an automated cleaning and safety assurance method for pipelines transporting ferrosilicon-containing wastewater. It offers the following advantages: 1. In this invention, a circulation system comprising a generator, a slurry tank, a supernatant tank, and a conveying pipeline is constructed. The scouring and frictional action generated by the silicon-iron particles in the wastewater flowing with the water flow removes scale from the inner wall of the pipeline. No additional cleaning equipment or manual opening of the cover is required. This effectively solves the problems of high safety risks, reliance on manual labor and high-pressure equipment in the prior art for cleaning operations. At the same time, it realizes the recycling of wastewater and improves the utilization rate of water resources.

[0022] 2. In this invention, by connecting compressed air pipelines at the pump inlets of the slurry tank and the supernatant tank and introducing compressed air to agitate the particles, the silicon iron particles are kept in a suspended state, preventing them from accumulating and clogging at the pump inlets and pipeline connections. This ensures the stable operation of the conveying power equipment, avoids production interruptions caused by blockages, and improves the continuity of system operation.

[0023] 3. In this invention, the pipeline pressure is monitored by a remote pressure transmission device at the outlet of the supernatant transfer pump. The amount of ferrosilicon added is dynamically adjusted according to the pressure data. This can accurately match the scaling removal requirements of the pipeline with the amount of ferrosilicon used, ensuring the scaling removal effect while avoiding excessive wear of the pipeline due to excessive ferrosilicon. This achieves a dynamic balance between cleaning effect and pipeline wear, and improves the stability of system operation.

[0024] 4. In this invention, by installing a wall thickness monitoring instrument at the wear-prone part of the pipeline to monitor the wall thickness in real time, and issuing an early warning signal when the wall thickness is lower than the warning threshold, potential pipeline wear hazards can be detected in time, making it easier for staff to carry out maintenance and replacement work in advance, preventing leakage accidents caused by insufficient pipeline wall thickness, and strengthening the safety guarantee of system operation.

[0025] 5. In this invention, by cooling the silicon-containing wastewater, remotely transmitting the liquid level and interlocking the outlet automatic control valve to regulate the liquid level, while limiting the particle size of silicon-containing particles and using wear-resistant pipelines with smooth inner walls, the conveying equipment and pipelines are effectively protected from high temperature and excessive wear, maintaining the hydraulic balance of the system, reducing equipment maintenance costs, and extending the service life of equipment and pipelines. Attached Figure Description

[0026] Figure 1 This is a flowchart illustrating an automatic cleaning and safety assurance method for a silicon-containing iron wastewater conveying pipeline according to the present invention.

[0027] The components include: 1. Generator; 2. Slag discharge valve; 3. Slurry tank; 4. Slurry pump; 5. Supernatant tank; 6. Supernatant transfer pump; 7. First wastewater transfer pipeline; 8. Second wastewater transfer pipeline; 9. Compressed air pipeline; 10. Remote pressure transmission device; 11. Wall thickness monitor; 12. Remote liquid level transmission; and 13. Outlet automatic control valve. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Please see the appendix Figure 1This invention provides an automatic cleaning and safety assurance method for a silicon-iron wastewater conveying pipeline, comprising a circulation system. The circulation system includes a generator 1, a slurry tank 3, a supernatant tank 5, and wastewater conveying pipelines connecting the various devices in sequence. The silicon-iron wastewater generated after the reaction of calcium carbide and water in the generator 1 is discharged into the slurry tank 3 through a slag discharge valve 2. The silicon-iron wastewater in the slurry tank 3 is conveyed to the supernatant tank 5 through a first wastewater conveying pipeline 7. The silicon-iron wastewater in the supernatant tank 5 is returned to the generator 1 through a second wastewater conveying pipeline 8, thereby completing the recycling of wastewater. During the wastewater recycling process, the scouring and friction generated by the silicon-iron particles carried in the silicon-iron wastewater flowing in the first wastewater conveying pipeline 7 and the second wastewater conveying pipeline 8 are used to continuously remove scale adhering to the inner wall of the pipeline.

[0030] Specifically, generator 1 provides a stable carrying space for the reaction of calcium carbide and water, ensuring the smooth progress of the reaction and achieving a stable production of silicon-containing iron wastewater. The slag discharge valve 2 controls the discharge rhythm of silicon-containing iron products after the reaction within generator 1, precisely regulating the wastewater discharge volume and preventing excessive discharge that could overload subsequent treatment processes, thus ensuring stable initial feed for the entire circulation system. The slurry tank 3 receives the silicon-containing iron wastewater from generator 1, temporarily storing the wastewater and providing a cooling buffer, thereby reducing the wastewater temperature and preventing damage to subsequent pipelines and equipment from high-temperature wastewater. The first wastewater conveying pipeline 7 establishes a conveying channel between the slurry tank 3 and the supernatant tank 5, while the slurry pump 4 provides the conveying power, stably transporting the cooled silicon-containing iron wastewater to the supernatant tank 5, ensuring a smooth wastewater circulation chain. The supernatant tank 5 temporarily stores the wastewater after the reaction... The ferrosilicon-containing wastewater transported by the first wastewater transport pipeline 7 serves to balance the water volume in the circulation system and further clarify the wastewater, thereby providing a stable water quality and quantity for the subsequent return to generator 1. A second wastewater transport pipeline 8 forms a return channel between the supernatant tank 5 and generator 1, with the supernatant transport pump 6 providing the return power, ensuring the stable return of the ferrosilicon-containing wastewater from the supernatant tank 5 to generator 1, thus achieving wastewater recycling and improving water resource utilization. During the entire recycling process, the ferrosilicon-containing particles carried in the wastewater flow synchronously with the water flow. The hardness of these particles continuously scours and rubs the inner walls of the first and second wastewater transport pipelines 7 and 8, physically removing scale such as calcium carbonate and calcium hydroxide adhering to the inner walls of the pipelines. This achieves automatic pipeline cleaning without the need for additional cleaning equipment, reducing manual intervention.

[0031] Furthermore, before the silicon-containing wastewater in the slurry tank 3 is transported to the supernatant tank 5 via the slurry pump 4, the silicon-containing wastewater needs to be cooled. The temperature of the wastewater after cooling is controlled at 30-40℃. The liquid level in the supernatant tank 5 is controlled by interlocking the liquid level remote sensor 12 set in the supernatant tank 5 with the outlet automatic control valve 13 of the slurry pump 4, so as to maintain the hydraulic connection between the supernatant tank 5 and the slurry tank 3.

[0032] Furthermore, the particle size range of the silicon-iron particles in the silicon-iron wastewater is 0.1-1mm; the first wastewater conveying pipeline 7 and the second wastewater conveying pipeline 8 are made of wear-resistant material with smooth inner walls; Specifically, by cooling the ferrosilicon-containing wastewater in the slurry tank and controlling its temperature at 30-40℃, the wastewater temperature is reduced, weakening its corrosiveness to pipelines and pumps, thus protecting subsequent conveying equipment and pipelines and extending their service life. The liquid level data of the supernatant tank 5 is collected in real time via a remote level transmitter 12, and interlocked with the outlet automatic control valve 13 of the slurry pump 4. The remote level transmitter 12 transmits the liquid level signal to the outlet automatic control valve 13, adjusting the opening of the outlet automatic control valve 13 to control the water flow from the slurry pump 4 to the first wastewater conveying pipeline 7, thus precisely regulating the liquid level in the supernatant tank 5. This maintains the hydraulic balance between the supernatant tank 5 and the slurry tank 3, preventing overflow due to excessively high liquid levels or interruption of subsequent return flow due to excessively low liquid levels. Furthermore, by limiting the amount of ferrosilicon particles in the ferrosilicon-containing wastewater... The particle size range is 0.1-1mm, ensuring that the silicon iron particles have sufficient hardness and fluidity. This prevents insufficient flushing force to remove scale due to excessively small particle size, while avoiding excessively large particle size that could cause pipeline blockage or excessive wear. This balances the flushing effect of the silicon iron particles with the safe operation of the pipeline, thereby improving automatic cleaning efficiency and extending pipeline lifespan. By using a smooth, wear-resistant material for the first wastewater conveying pipeline 7 and the second wastewater conveying pipeline 8, the flow resistance of water and silicon iron particles within the pipeline is reduced, decreasing energy consumption and ensuring smooth wastewater flow. Simultaneously, it enhances the pipeline's resistance to silicon iron particle flushing, mitigating wear and extending service life. This ultimately reduces pipeline maintenance costs and ensures long-term stable operation of the circulating conveying chain.

[0033] Furthermore, compressed air lines 9 are connected to the inlet of the slurry pump 4 in the slurry tank 3 and the inlet of the supernatant transfer pump 6 in the supernatant tank 5, respectively; compressed air is introduced into the compressed air lines 9 to agitate and keep the silicon iron particles in a suspended state. Furthermore, the agitation method is intermittent agitation or continuous agitation; when intermittent agitation is used, the agitation cycle is 3-8 minutes every 25-35 minutes; the compressed air pressure range of the compressed air introduced into the compressed air pipeline 9 is 0.3-0.5MPa.

[0034] Specifically, by connecting compressed air pipelines 9 to the inlet of the slurry pump 4 in the slurry tank 3 and the inlet of the supernatant transfer pump 6 in the supernatant tank 5, compressed air is introduced into these two key pump inlet areas to agitate and break the settling trend of ferrosilicon particles and promote their re-suspension. This helps to prevent ferrosilicon particles from accumulating at the pump inlet and pipeline connections, prevent pump blockage and shutdown, and ensure the stable operation of the conveying power equipment.

[0035] By offering two selectable aeration modes—intermittent or continuous aeration—the system can adapt to the suspension requirements of ferrosilicon particles under different operating conditions. The intermittent aeration mode is set to aerate for 3-8 minutes every 25-35 minutes. This reduces compressed air consumption during non-aeration periods while maintaining the suspension of ferrosilicon particles through periodic aeration, thus balancing the suspension effect with energy consumption costs. Simultaneously, the compressed air pressure supplied to the compressed air pipeline 9 is limited to 0.3-0.5 MPa. This pressure range ensures sufficient airflow disturbance to effectively suspend the ferrosilicon particles without causing excessive pressure that could lead to violent splashing of liquid in the pool, impact on equipment, or increased pressure load on the pipeline. This allows for precise control of the aeration intensity, thereby achieving a balance between ensuring anti-clogging effectiveness and operational economy and equipment safety.

[0036] Furthermore, the fluid pressure in the second wastewater delivery pipeline 8 is monitored by the remote pressure transmission device 10 installed at the outlet of the supernatant delivery pump 6, and the amount of ferrosilicon added to the system is dynamically adjusted according to the monitored pressure data to adjust the concentration of ferrosilicon particles in the wastewater. The dynamic adjustment specifically includes: increasing the amount of silicon iron added when the monitored pressure value is continuously higher than the first preset pressure threshold; and reducing the amount of silicon iron added when the monitored pressure value is continuously lower than the second preset pressure threshold or when abnormal fluctuations occur. The first preset pressure threshold is 0.55-0.65 MPa, and the second preset pressure threshold is 0.15-0.25 MPa.

[0037] Furthermore, the dynamic adjustment of the amount of ferrosilicon added is performed by the ferrosilicon adding device.

[0038] Specifically, the remote pressure transmission device 10 installed at the outlet of the supernatant transfer pump 6 collects fluid pressure data in real time within the second wastewater transfer pipeline 8, accurately capturing signals of changes in pipeline operating status, thus providing reliable data support for the dynamic adjustment of ferrosilicon content. Combined with the set first preset pressure threshold of 0.55-0.65 MPa and second preset pressure threshold of 0.15-0.25 MPa, when the pressure consistently exceeds the first preset threshold, it can be accurately determined that increased scaling in the pipeline or insufficient ferrosilicon content leads to increased transport resistance. At this point, increasing the amount of ferrosilicon added enhances the scouring force of ferrosilicon particles on the pipeline inner wall, improves scaling removal efficiency, and thus rapidly reduces pipeline scaling. The system effectively reduces resistance and restores smooth pipeline flow. When the pressure remains below the second preset threshold or exhibits abnormal fluctuations, it accurately identifies excessive ferric silica content as causing increased pipeline wear or abnormally reduced flow resistance. In such cases, reducing the amount of ferric silica added prevents excessive ferric silica particles from scouring the pipeline and controls pipeline wear, thereby achieving a balance between cleaning effectiveness and pipeline wear, and extending pipeline lifespan. Furthermore, the dynamic adjustment command for the amount of ferric silica added through the ferric silica addition device replaces manual operation and enables automated and precise control of the ferric silica amount. This reduces manual intervention, lowers operational errors, and ensures timely and stable adjustment, ultimately achieving a dynamic balance between pipeline cleaning effectiveness and operational safety.

[0039] Furthermore, a wall thickness monitor 11 is installed at the wear-prone parts of the first wastewater conveying pipeline 7 and the second wastewater conveying pipeline 8 to monitor the pipeline wall thickness and issue an early warning signal when the monitored wall thickness data is lower than a preset early warning threshold, in order to assess the real-time status of the pipeline structural integrity. Wear-prone parts include elbows, tees, diameter changes, and pipe sections that are in a high flow velocity state for a long time. The early warning threshold is set to 75-85% of the original pipeline wall thickness.

[0040] Specifically, by installing wall thickness monitors 11 at easily worn locations such as elbows, tees, diameter changes, and long-term high-flow-rate sections of the first wastewater transmission pipeline 7 and the second wastewater transmission pipeline 8, the system can specifically capture the status data of the most severely worn areas of the pipeline. This allows for precise focusing on high-risk areas and real-time collection of pipeline wall thickness information, thereby achieving a comprehensive understanding of the pipeline's structural integrity and avoiding overlooking critical wear hazards. By setting 75-85% of the original pipeline wall thickness as a warning threshold, the system clarifies the boundary standards for safe pipeline operation, scientifically defining risk levels and avoiding premature warnings that waste resources or late warnings that lead to safety accidents. This provides staff with a clear basis for maintenance judgments. When the data monitored by the wall thickness monitor 11 falls below this warning threshold, a warning signal is issued in a timely manner, serving as an early warning of the risk of excessive pipeline wear. This allows staff to carry out timely maintenance or replacement work, effectively preventing leakage accidents caused by insufficient pipeline wall thickness, ensuring the long-term stable operation of the entire circulation system, and replacing traditional manual periodic inspections. This reduces the intensity of manual operation and inspection errors, improving the timeliness and reliability of pipeline safety monitoring.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic cleaning and safety assurance method for a silicon-ferric wastewater conveying pipeline, comprising a circulation system, characterized in that: The circulation system includes a generator (1), a slurry tank (3), a supernatant tank (5) connected in sequence, and wastewater conveying pipelines connecting the various devices; the silicon-iron wastewater generated after the reaction of calcium carbide and water in the generator (1) is discharged into the slurry tank (3) through the slag discharge valve (2); the silicon-iron wastewater in the slurry tank (3) is conveyed to the supernatant tank (5) through the first wastewater conveying pipeline (7); the silicon-iron wastewater in the supernatant tank (5) is returned to the generator (1) through the second wastewater conveying pipeline (8), thereby completing the recycling of wastewater; During the wastewater recycling process, the scouring and friction generated by the silicon-iron particles carried in the silicon-iron wastewater flowing in the first wastewater conveying pipeline (7) and the second wastewater conveying pipeline (8) are used to continuously remove the scale adhering to the inner wall of the pipeline.

2. The automatic cleaning and safety assurance method for a silicon-containing ferrosilicon wastewater conveying pipeline according to claim 1, characterized in that: Compressed air lines (9) are connected to the inlet of the slurry pump (4) in the slurry tank (3) and the inlet of the supernatant transfer pump (6) in the supernatant tank (5), respectively; by introducing compressed air into the compressed air lines (9) to agitate and keep the silicon iron particles in a suspended state.

3. The automatic cleaning and safety assurance method for a silicon-ferrous wastewater conveying pipeline according to claim 2, characterized in that: The agitation method is intermittent agitation or continuous agitation; when intermittent agitation is used, the agitation cycle is 3-8 minutes every 25-35 minutes; the compressed air pressure range of the compressed air entering the compressed air pipeline (9) is 0.3-0.5MPa.

4. The automatic cleaning and safety assurance method for a silicon-ferrous wastewater conveying pipeline according to claim 2, characterized in that: The pressure in the second wastewater delivery pipeline (8) is monitored by a remote pressure transmission device (10) installed at the outlet of the supernatant delivery pump (6), and the amount of ferrosilicon added to the system is dynamically adjusted according to the monitored pressure data to adjust the concentration of ferrosilicon particles in the wastewater.

5. The automatic cleaning and safety assurance method for a silicon-ferrous wastewater conveying pipeline according to claim 4, characterized in that: The dynamic adjustment specifically includes: increasing the amount of silicon iron added when the monitored pressure value is continuously higher than the first preset pressure threshold; and reducing the amount of silicon iron added when the monitored pressure value is continuously lower than the second preset pressure threshold or when abnormal fluctuations occur. The first preset pressure threshold is 0.55-0.65 MPa, and the second preset pressure threshold is 0.15-0.25 MPa.

6. The automatic cleaning and safety assurance method for a silicon-ferrous wastewater conveying pipeline according to claim 5, characterized in that: The dynamic adjustment of the amount of silicon iron added is performed by the silicon iron adding device.

7. The automatic cleaning and safety assurance method for a silicon-ferrous wastewater conveying pipeline according to claim 1, characterized in that: Wall thickness monitors (11) are installed at wear-prone parts of the first wastewater conveying pipeline (7) and the second wastewater conveying pipeline (8) to monitor the pipeline wall thickness and issue an early warning signal when the monitored wall thickness data is lower than a preset early warning threshold, so as to assess the real-time status of the pipeline structural integrity.

8. The automatic cleaning and safety assurance method for a silicon-containing ferrosilicon wastewater conveying pipeline according to claim 7, characterized in that: The easily worn parts include elbows, tees, reducers, and pipe sections that are in a state of high flow velocity for a long time; the warning threshold is set to 75-85% of the original wall thickness of the pipeline.

9. The automatic cleaning and safety assurance method for a silicon-ferrous wastewater conveying pipeline according to claim 1, characterized in that: Before the silicon-containing iron wastewater in the slurry tank (3) is transported to the supernatant tank (5) via the slurry pump (4), the silicon-containing iron wastewater needs to be cooled. The temperature of the wastewater after cooling is controlled at 30-40℃. The liquid level in the supernatant tank (5) is controlled by interlocking the liquid level remote transmitter (12) set in the supernatant tank (5) with the outlet self-control valve (13) of the slurry pump (4) to maintain the hydraulic connection between the supernatant tank (5) and the slurry tank (3).

10. The automatic cleaning and safety assurance method for a silicon-ferrous wastewater conveying pipeline according to claim 1, characterized in that: The particle size range of the silicon-iron particles in the silicon-iron wastewater is 0.1-1mm; the first wastewater conveying pipeline (7) and the second wastewater conveying pipeline (8) are made of wear-resistant material with smooth inner walls.

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