Continuous casting machine turbid circulating water treatment system for sludge resourceful treatment and working method

Abstract

The invention relates to the technical field of metallurgical industry water treatment and solid waste recycling, and particularly discloses a continuous casting machine turbid circulating water treatment system for sludge recycling treatment and a working method.The continuous casting machine turbid circulating water treatment system comprises a sludge storage pool and a continuous casting machine turbid circulating water suction pool, and the sludge storage pool is arranged near the continuous casting machine turbid circulating water suction pool; the sludge storage pool is used for storing sewage discharged by dredging of the turbid ring suction pool of the continuous casting machine, and an intelligent dynamic regulation and storage device and a rotational flow oil removal-air flotation coupling unit are mounted on the sludge storage pool; the bottom of the sludge storage pool is obliquely arranged, a water suction well is arranged at the lowest position of the bottom of the sludge storage pool, a slurry pump platform is installed above the water suction well, at least one slurry pump is installed on the slurry pump platform, and the slurry pump sucks settled sewage in the sludge storage pool; according to the invention, a traditional timed dredging mode is broken through, decision is driven through data, manual intervention is reduced, the system response time is shortened by 60%, meanwhile, the floating oil capture problem of a traditional closed device is solved, and the filter material pollution risk of the double-cyclone filter is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment and solid waste resource utilization in the metallurgical industry, and particularly relates to a continuous casting machine turbid circulating water treatment system for sludge resource treatment and a working method thereof. Background Art

[0002] During the secondary spray cooling process of the continuous casting machine turbid circulating water, a large amount of scale, grease and suspended matter are carried. The existing technology adopts a combined process of a swirl sedimentation well, an integrated metallurgical sewage purification treatment device and a double swirl filter, which has the following problems:

[0003] 1. Hydraulic load fluctuation: The intermittent change of the return water volume in the swirl well causes the flow velocity of the integrated purification device to be unstable. When the flow rate peak occurs, the treatment efficiency drops sharply (the suspended solid removal rate drops from 85% to 60%), and the double swirl filter operates overloaded (the pressure difference increases by 40%).

[0004] 2. Floating oil pollution: The closed purification device cannot effectively capture floating oil (the oil interception rate < 50%), resulting in the adsorption pollution of the filter material (the backwashing period is shortened by 50%), and the oil content in the produced water > 15 mg / L.

[0005] 3. High cost of silt cleaning and shutdown: When multiple continuous casting machines share a turbid circulating water tank, the whole system needs to be shut down for 4 - 5 days for silt cleaning, resulting in a large loss of annual output.

[0006] 4. Inefficient sludge disposal: In the traditional pressure filtration and landfill mode, the water content of the sludge > 80%, resulting in high transportation costs and resource waste.

[0007] The existing improvement plan proposes a modular sedimentation tank design, but it does not solve the problems of floating oil separation and sludge resource utilization, and lacks intelligent control ability. Therefore, in order to solve the above problems, it is necessary to design a continuous casting machine turbid circulating water treatment system for sludge resource treatment and a working method thereof. Summary of the Invention

[0008] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a continuous casting machine turbid circulating water treatment system for sludge resource treatment and a working method thereof. Through the Internet of Things storage and regulation system, it breaks through the traditional fixed-time silt cleaning mode, makes decisions based on data-driven, reduces manual intervention, shortens the system response time by 60%, ensures the stable operation of the treatment device, and at the same time realizes the efficient separation of floating oil (the oil interception rate ≥ 95%) through the swirl oil removal - air flotation coupling unit, solves the problem of floating oil capture by the traditional closed device, reduces the risk of filter material pollution of the double swirl filter, realizes the improvement of the water quality of the turbid circulating washing water tank, and effectively solves the purpose of facilitating silt cleaning of the turbid circulating water tank.

[0009] The technical solution adopted by the present invention to solve its technical problems is: a continuous casting machine turbidity ring water treatment system for sludge resource treatment, including a sludge storage tank and a continuous casting machine turbidity ring suction tank. The sludge storage tank is arranged near the continuous casting machine turbidity ring suction tank. The sludge storage tank stores the sewage discharged from the dredging of the continuous casting machine turbidity ring suction tank. An intelligent dynamic regulation device and a cyclone oil removal - air flotation coupling unit are installed on the sludge storage tank.

[0010] The bottom of the sludge storage tank is inclined. A water suction well is provided at the lowest point of the bottom of the sludge storage tank. A slurry pump platform is installed above the water suction well, and at least one slurry pump is installed on the slurry pump platform. The slurry pump sucks the sediment sewage in the sludge storage tank.

[0011] Specifically, the sludge storage tank adopts a horizontal flow sedimentation tank. The tank type of the sludge storage tank is rectangular. The wastewater in the sludge storage tank flows in from one end, flows horizontally, and flows out from the other end.

[0012] Specifically, at least one mobile submersible pump is installed in the continuous casting machine turbidity ring suction tank.

[0013] Specifically, a sewage pipeline is laid between the continuous casting machine turbidity ring suction tank and the sludge storage tank. The sewage pipeline is connected to the mobile submersible pump, and the sewage sucked by the mobile submersible pump is transported to the sludge storage tank.

[0014] Specifically, the sludge storage tank is connected to the pipeline at the sludge thickening tank after the sludge discharge pipe of the high - efficiency clarifier through a sludge pipeline. The sludge storage tank converges with the sludge discharge pipe of the high - efficiency clarifier to discharge the sewage to the two - step plate - frame filter press for pressure filtration.

[0015] Specifically, a ladder is installed on the slurry pump platform.

[0016] Specifically, the intelligent dynamic regulation device is equipped with a turbidity sensor, an oil concentration meter, and a sludge interface meter. The turbidity sensor, the oil concentration meter, and the sludge interface meter form an Internet of Things sensing network, which is used to trigger the dredging mode when the water quality parameter SS≤100mg / L, and dynamically adjust the suction rate of the mobile submersible pump and the conveying frequency of the slurry pump in combination with the fuzzy PID control algorithm.

[0017] Specifically, the cyclone oil removal - air flotation coupling unit adopts super - oleophobic modified fillers. The contact angle of the super - oleophobic modified fillers is >150° to intercept floating oil, and the micro - nano bubble generating device is combined to control the bubble diameter <50μm.

[0018] A working method of a continuous casting machine turbidity ring water treatment system for sludge resource treatment includes the following steps:

[0019] S1. When multiple continuous casting machines are shut down for short-term maintenance (short-term means less than 1 day), use a mobile submersible sewage pump to suck and pressurize the sewage in the turbid water suction pool of the continuous casting machine and send it to the newly built sludge storage pool. Utilize the gravity effect to make the suspended solids and solid impurities in the sewage settle down in the sedimentation area of the sludge storage pool;

[0020] S2. After the maintenance is completed, the continuous casting machine starts normal production, and the sludge in the sludge storage pool settles and the moisture evaporates;

[0021] S3. According to actual needs, start the slurry pump to pressurize the sewage in the sludge storage pool and send it to the sludge thickening pool after the sludge discharge pipe of the high-efficiency clarifier. After converging with the sludge discharge pipe of the high-efficiency clarifier and discharging it to the two-step plate and frame filter press for pressure filtration, the sludge is transported to the subsequent process for resource utilization.

[0022] The present invention has the following beneficial effects:

[0023] The continuous casting machine turbid water treatment system and working method for sludge resource treatment designed by the present invention break through the traditional regular dredging mode, make decisions through data-driven, reduce manual intervention, shorten the system response time by 60%, and at the same time solve the problem of floating oil capture in traditional closed devices and reduce the risk of filter media pollution of the double swirl filter.

[0024] The continuous casting machine turbid water treatment system and working method for sludge resource treatment designed by the present invention maximize the improvement of the turbid water supply quality of the continuous casting machine, reducing the clogging rate of the casting machine nozzles from 5% to 3%.

[0025] The continuous casting machine turbid water treatment system and working method for sludge resource treatment designed by the present invention improve the gas-water atomization effect and cooling capacity of the continuous casting machine nozzles, promoting the improvement of the slab quality.

[0026] The continuous casting machine turbid water treatment system and working method for sludge resource treatment designed by the present invention provide a sludge storage site for dredging the water treatment pool during the shutdown and maintenance of the casting machine, minimizing environmental pollution to the greatest extent.

[0027] The continuous casting machine turbid water treatment system and working method for sludge resource treatment designed by the present invention meet the energy medium requirements of the steelmaking plant and further reduce energy consumption. Description of the Drawings

[0028] Figure 1 It is a flow chart of the working method of the continuous casting machine turbid water treatment system for sludge resource treatment.

[0029] Figure 2 It is a schematic cross-sectional view of the sludge storage pool.

[0030] Figure 3 It is a top view of the sludge storage pool.

[0031] In the figure: 1 - sludge storage tank; 2 - slurry pump; 3 - suction well; 4 - slurry pump platform; 5 - guardrail. Detailed implementation mode

[0032] The following will further clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] As Figures 1-3 shown, a continuous casting machine turbid circulating water treatment system for sludge resource treatment includes a sludge storage tank 1, an intelligent dynamic regulation device, a mobile submersible pump, a sewage pipeline for transporting sewage from the turbid circulating water suction tank to the sludge storage tank, a slurry pump 2, a pipeline from the sludge storage tank to the sludge thickening tank after the sludge discharge pipe of the high-efficiency clarifier, and a hydrocyclone oil removal - air flotation coupling unit. The sludge storage tank 1 is arranged near the turbid circulating water suction tank of the continuous casting machine. The sludge storage tank 1 stores the sewage discharged from the dredging of the turbid circulating water suction tank of the continuous casting machine. An intelligent dynamic regulation device and a hydrocyclone oil removal - air flotation coupling unit are installed on the sludge storage tank. A sludge storage tank 1 with an appropriate capacity is built at a suitable position near the turbid circulating water tank of the continuous casting machine to store the sewage discharged from the dredging of the turbid circulating water suction tank when multiple continuous casting machines are shut down for maintenance for a short time (about less than 1 day). Its working principle is to use the gravity effect to make the suspended solids and solid impurities in the sewage settle down in the sedimentation area.

[0034] The bottom of the sludge storage tank 1 is inclined. The lowest part of the bottom of the sludge storage tank 1 is provided with a suction well 3. A slurry pump platform 4 is installed above the suction well 3. A guardrail 5 and a ladder are installed on the slurry pump platform 4 for personnel to work on the slurry pump platform 4.

[0035] At least one slurry pump 2 with appropriate flow rate and head is installed on the operation slurry pump platform 4. The slurry pump 2 sucks the sedimented sewage in the sludge storage tank 1.

[0036] The sludge storage tank 1 adopts a horizontal flow sedimentation tank. The tank type of the sludge storage tank 1 is rectangular. The wastewater of the sludge storage tank 1 flows in from one end, flows horizontally, and flows out from the other end.

[0037] A suction well 3 is arranged at the bottom of the inlet of the sludge storage tank 1, and the bottom of other parts of the tank has a slope. The tank type of the sludge storage tank 1 is relatively long, making full use of the length of the tank to make the sewage stay in the tank for a longer time, so as to more effectively remove suspended solids and solid impurities, effectively reduce the operation load of the subsequent high-efficiency clarifier, and further improve and enhance the water production quality of the double hydrocyclone filter.

[0038] At least one mobile submersible pump with appropriate flow rate and head is installed in the turbid circulating water suction tank of the continuous casting machine for sucking the sewage in the turbid circulating water suction tank.

[0039] A sewage pipeline is laid between the dirty loop suction water tank of the continuous casting machine and the sludge storage tank 1. The pipe diameter is appropriate. The sewage pipeline is connected to a mobile submersible sewage pump, and the sewage pumped by the mobile submersible sewage pump is transported to the sludge storage tank.

[0040] Specifically, the sludge storage tank is connected to the pipeline at the sludge thickening tank after the sludge discharge pipe of the high-efficiency clarifier through a sludge pipeline. The sludge storage tank converges with the sludge discharge pipe of the high-efficiency clarifier to discharge sewage to the two-step plate and frame filter press for pressure filtration and resource utilization in the subsequent process.

[0041] The intelligent dynamic regulation device is equipped with a turbidity sensor, an oil concentration meter, and a sludge interface meter. The turbidity sensor, the oil concentration meter, and the sludge interface meter form an Internet of Things sensing network, which is used to trigger the silt cleaning mode when the water quality parameter SS≤100mg / L, and dynamically adjust the suction rate of the mobile submersible sewage pump and the conveying frequency of the slurry pump in combination with the fuzzy PID control algorithm to achieve the adaptive matching of hydraulic load and sludge concentration.

[0042] The swirl oil removal - air flotation coupling unit uses super - oleophobic modified packing. The contact angle of the super - oleophobic modified packing >150° intercepts floating oil, and combines with a micro - nano bubble generating device to control the bubble diameter <50μm, improving the floating rate of oil droplets. The oil - water separation efficiency is increased from 75% to 92%.

[0043] In the second aspect of the present invention, the purpose is to provide a method for treating the dirty loop water of a continuous casting machine through intelligent dynamic regulation, oil - sludge collaborative separation, and sludge resource treatment, including the following steps:

[0044] 1. When multiple continuous casting machines are shut down for short - term full - stop maintenance, the short - term is less than 1 day. Use a mobile submersible sewage pump to pump and pressurize the sewage in the dirty loop suction water tank of the continuous casting machine to the newly built sludge storage tank 1. Utilize the gravity action to make the suspended solids and solid impurities in the sewage settle in the sedimentation area of the sludge storage tank.

[0045] 2. After the maintenance is completed, the continuous casting machine starts normal production, and the sludge in the sludge storage tank 1 settles and the water evaporates.

[0046] 3. According to actual needs, start the slurry pump 2 to pressurize and transport the sewage in the sludge storage tank 1 to the pipeline at the sludge thickening tank after the sludge discharge pipe of the high - efficiency clarifier. After converging with the sludge discharge pipe of the high - efficiency clarifier and discharging it to the two - step plate and frame filter press for pressure filtration, the sludge is transported to the subsequent process for resource utilization.

[0047] The present invention is not limited to the above - mentioned embodiments. Anyone should know that the structural changes made under the inspiration of the present invention, as long as they have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

[0048] The technologies, shapes, and structures not detailedly described in the present invention are all well - known technologies.

Claims

1. A continuous casting machine turbid water treatment system for sludge resource treatment, characterized in that: It includes a sludge storage tank and a continuous casting machine turbid ring water absorption tank. The sludge storage tank is arranged near the continuous casting machine turbid ring water absorption tank. The sludge storage tank stores sewage discharged from the continuous casting machine turbid ring water absorption tank by dredging. An intelligent dynamic storage device and a cyclone deoiling-air flotation coupling unit are installed on the sludge storage tank. The bottom of the sludge storage tank is inclined, and a suction well is provided at the lowest point of the bottom of the sludge storage tank. A slurry pump platform is installed above the suction well. At least one slurry pump is installed on the slurry pump platform to pump the settled sewage in the sludge storage tank.

2. The continuous casting machine turbid water treatment system for sludge resource treatment according to claim 1 is characterized in that: The sludge storage tank adopts a horizontal flow sedimentation tank. The sludge storage tank is rectangular in shape. Wastewater in the sludge storage tank flows in from one end, flows horizontally, and flows out from the other end.

3. The continuous casting machine turbid water treatment system for sludge resource treatment according to claim 1 is characterized in that: At least one mobile submersible sewage pump is installed in the turbid ring water suction tank of the continuous casting machine.

4. The continuous casting machine turbid water treatment system for sludge resource treatment according to claim 3 is characterized in that: A sewage pipeline is laid between the continuous casting machine turbid ring water suction tank and the sludge storage tank, and the sewage pipeline is connected to a mobile submersible sewage pump, and the sewage sucked by the mobile submersible sewage pump is transported to the sludge storage tank.

5. The continuous casting machine turbid water treatment system for sludge resource treatment according to claim 1 is characterized in that: The sludge storage tank is connected to the pipeline of the sludge concentration tank behind the high-efficiency clarifier sludge discharge pipe through the sludge pipeline. The sludge storage tank merges with the high-efficiency clarifier sludge discharge pipe to discharge sewage to the two-step plate and frame filter press for filtration.

6. The continuous casting machine turbid water treatment system for sludge resource treatment according to claim 1 is characterized in that: A ladder is installed on the slurry pump platform.

7. The continuous casting machine turbid water treatment system for sludge resource treatment according to claim 1 is characterized in that: The intelligent dynamic storage device is equipped with a turbidity sensor, an oil concentration meter, and a sludge interface meter. The turbidity sensor, the oil concentration meter, and the sludge interface meter form an Internet of Things sensor network, which is used to trigger the dredging mode when the water quality parameter SS is less than or equal to 100 mg / L, and dynamically adjust the suction rate of the mobile submersible sewage pump and the delivery frequency of the slurry pump in combination with the fuzzy PID control algorithm.

8. The continuous casting machine turbid water treatment system for sludge resource treatment according to claim 7 is characterized in that: The cyclone oil removal-air flotation coupling unit adopts a super oleophobic modified filler, the contact angle of the super oleophobic modified filler is greater than 150° to intercept floating oil, and is combined with a micro-nano bubble generating device to control the bubble diameter to less than 50 μm.

9. The working method of the continuous casting machine turbid water treatment system for sludge resource treatment according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. When multiple continuous casting machines are shut down for short-term maintenance (short-term is less than 1 day), a mobile submersible sewage pump is used to pump and pressurize the sewage in the turbid ring suction tank of the continuous casting machine to the newly built sludge storage tank, and gravity is used to make the suspended matter and solid impurities in the sewage settle in the sedimentation area of ​​the sludge storage tank; S2. After the overhaul, the continuous casting machine starts normal production, and the sludge in the sludge storage tank settles and the water evaporates; S3. According to actual needs, start the slurry pump to pressurize the sewage in the sludge storage tank and send it to the sludge thickening tank behind the high-efficiency clarifier sludge discharge pipe. After merging with the high-efficiency clarifier sludge discharge pipe and discharging it to the two-step plate and frame filter press for filtration, the sludge is transported to the subsequent process for resource utilization.

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