Desalted water closed circulating cooling system for rotary drum of high-speed bar production line

Abstract

The invention discloses a high-speed bar production line rotary drum demineralized water closed circulation cooling system which comprises a blast cooling water return pipeline, and the blast cooling water return pipeline is communicated with a first cooler and a second cooler through pipelines respectively. The first cooler and the second cooler are respectively communicated with the water tank through pipelines, the first cooler and the second cooler are communicated through a pipeline, the water tank is communicated with a rotary drum cooling water supply pipeline, and the water tank is further communicated with a water supplementing pipeline. The cooling device has the advantages of high cooling efficiency, long service life, stable operation, energy conservation, environmental protection and low maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of circulating cooling system technology, and in particular to a closed-loop circulating cooling system for demineralized water in a high-speed bar production line. Background Technology

[0002] Currently, the drum cooling systems in high-speed bar mill production lines generally use clean circulating water as the cooling medium. Under the high-temperature operating environment of the drum, calcium and magnesium ions in the clean circulating water easily deposit, gradually clogging the internal cooling channels of the drum spindle. This leads to decreased cooling efficiency, localized overheating and deformation of the drum, abnormal equipment torque alarms, and consequently, frequent downtime for maintenance. To solve the clogging problem, acid pickling is often used, but acid pickling exacerbates metal corrosion, shortening the lifespan of joints and hoses, creating a vicious cycle of "clogging—acid pickling—corrosion—replacement," resulting in high maintenance costs and impacting production continuity. Furthermore, traditional cooling methods are mostly open systems, with high-temperature cooling water directly discharged, not only wasting water resources but also increasing water treatment and heat loss costs.

[0003] Therefore, a closed-loop circulating cooling system for demineralized water in a high-speed bar production line is provided to solve the above problems. Summary of the Invention

[0004] The main objective of this invention is to address the problem in existing technologies where, under the high-temperature operating environment of a rotary drum, calcium and magnesium ions in the circulating water easily deposit, gradually clogging the internal cooling channels of the drum spindle. This leads to decreased cooling efficiency, localized overheating and deformation of the drum, abnormal torque alarms, and ultimately, frequent downtime for maintenance. While acid cleaning is commonly used to solve this problem, it exacerbates metal corrosion, shortening the lifespan of joints and hoses, creating a vicious cycle of "clogging—acid cleaning—corrosion—replacement," resulting in high maintenance costs and disruption to production continuity.

[0005] This invention provides a closed-loop cooling system for demineralized water in a high-speed bar production line, the closed-loop cooling system comprising: The drum cooling return water pipeline is connected to the first cooler and the second cooler via pipelines. The first cooler and the second cooler are connected to the water tank via pipelines. The first cooler and the second cooler are connected to each other via pipelines. The water tank is connected to the cooling water supply pipeline for the drum and is also connected to the water replenishment pipeline.

[0006] Optionally, the first cooler is also connected to the first clean circulating water supply pipeline and the first clean circulating water return pipeline, and water valves are provided on both the first clean circulating water supply pipeline and the first clean circulating water return pipeline.

[0007] Optionally, the second cooler is also connected to the second clean circulating water supply pipeline and the second clean circulating water return pipeline, and water valves are provided on both the second clean circulating water supply pipeline and the second clean circulating water return pipeline.

[0008] Optionally, a first water valve is provided on the pipeline between the blast cooling return water pipeline and the first cooler, and a second water valve is provided on the pipeline between the blast cooling return water pipeline and the second cooler.

[0009] Optionally, a third water valve is provided on the pipeline between the first cooler and the second cooler, a fourth water valve is provided on the pipeline between the first cooler and the water tank, and a fifth water valve is provided on the pipeline between the second cooler and the water tank.

[0010] Optionally, the cooling water pipeline for the rotating drum includes a main pipeline, a first water supply branch, a second water supply branch, and a third water supply branch. The main pipeline is equipped with a sixth water valve and a seventh water valve. The pipeline before the sixth water valve is connected to the water tank via the first water supply branch. The pipeline between the sixth and seventh water valves is connected to the water tank via the second water supply branch. The pipeline after the seventh water valve is connected to the water tank via the third water supply branch.

[0011] Optionally, the first water supply branch includes an eighth water valve, a first water pump, and a ninth water valve, which are connected in series.

[0012] Optionally, the second water supply branch includes a tenth water valve, a second water pump, and an eleventh water valve, which are connected in series.

[0013] Optionally, the third water supply branch includes a twelfth water valve, a third water pump, and a thirteenth water valve, which are connected in series.

[0014] Optionally, the water supply pipeline includes a water supply valve, and a bypass water supply pipeline is provided on one side of the water supply valve, and a bypass water supply valve is provided on the bypass water supply pipeline.

[0015] This invention utilizes demineralized water, which contains almost no calcium or magnesium ions, eliminating scaling and clogging, ensuring unobstructed cooling channels, improving cooling efficiency, avoiding acid pickling corrosion, reducing damage to components such as drums, joints, and hoses, and extending the overall equipment lifespan. It employs a "two-in-one-backup" water pump configuration and a "one-in-one-backup, two-unit-shared" cooler configuration, ensuring high system reliability and reducing unplanned downtime. The closed-loop design significantly reduces demineralized water consumption and high-temperature water discharge, lowering water treatment costs and heat loss. The system operates automatically, drastically reducing maintenance frequency and resulting in significant savings in labor and material costs. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the system structure of the present invention. Detailed Implementation

[0017] This invention provides a closed-loop circulating cooling system for demineralized water in a high-speed bar mill production line, comprising: a drum cooling return water pipeline, which is connected to a first cooler and a second cooler via pipelines; the first cooler and the second cooler are connected to a water tank via pipelines; the first cooler and the second cooler are connected to each other via pipelines; the water tank is connected to a cooling water supply pipeline for the drum; and the water tank is also connected to a makeup water pipeline. The main objective of this invention is to address the problem in existing technologies where, under the high-temperature operating environment of the drum, calcium and magnesium ions in the circulating water easily deposit, gradually clogging the internal cooling channels of the drum spindle. This leads to decreased cooling efficiency, localized overheating and deformation of the drum, abnormal equipment torque alarms, and frequent shutdowns for maintenance. While acid washing is commonly used to solve the clogging problem, it exacerbates metal corrosion, shortens the lifespan of joints and hoses, creating a vicious cycle of "clogging—acid washing—corrosion—replacement," resulting in high maintenance costs and disruption to production continuity.

[0018] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" or "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] Example Reference manual attached Figure 1 This embodiment provides a closed-loop circulating cooling system for demineralized water in a high-speed bar production line. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line includes: The drum cooling return water pipeline is connected to the first cooler 5 and the second cooler 8 through pipelines. The first cooler 5 and the second cooler 8 are connected to the water tank 12 through pipelines. The first cooler 5 and the second cooler 8 are connected to each other through pipelines. The water tank is connected to the cooling water supply pipeline for the drum. The water tank 12 is also connected to the water replenishment pipeline.

[0020] The first cooler 5 is also connected to the first clean circulating water supply pipeline 3 and the first clean circulating water return pipeline 4. Water valves are installed on both the first clean circulating water supply pipeline 3 and the first clean circulating water return pipeline 4.

[0021] The second cooler 8 is also connected to the second clean circulation water supply pipeline 9 and the second clean circulation water return pipeline 10. Water valves are installed on both the second clean circulation water supply pipeline and the second clean circulation water return pipeline.

[0022] A first water valve 2 is installed on the pipeline between the blast cooling return water pipeline and the first cooler, and a second water valve 1 is installed on the pipeline between the blast cooling return water pipeline and the second cooler.

[0023] A third water valve 6 is installed on the pipeline between the first cooler 5 and the second cooler, a fourth water valve 7 is installed on the pipeline between the first cooler 5 and the water tank 12, and a fifth water valve 11 is installed on the pipeline between the second cooler 8 and the water tank 12.

[0024] The cooling water supply pipeline for the rotary drum includes a main pipeline, a first water supply branch, a second water supply branch, and a third water supply branch. The main pipeline is equipped with a sixth water valve 22 and a seventh water valve 23. The pipeline before the sixth water valve 22 is connected to the water tank 12 through the first water supply branch. The pipeline between the sixth water valve 22 and the seventh water valve 23 is connected to the water tank 12 through the second water supply branch. The pipeline after the seventh water valve 23 is connected to the water tank through the third water supply branch.

[0025] The first water supply branch includes an eighth water valve 13, a first water pump 14, and a ninth water valve 15, which are connected in series.

[0026] The second water supply branch includes the tenth water valve 16, the second water pump 17, and the eleventh water valve 18, which are connected in series.

[0027] The third water supply branch includes the twelfth water valve 19, the third water pump 20, and the thirteenth water valve 21, which are connected in series.

[0028] The water supply pipeline includes a water supply valve 24, and a bypass water supply pipeline is provided on one side of the water supply valve 24. A bypass water supply valve 25 is provided on the bypass water supply pipeline.

[0029] The principle of this invention: When the water level in the cooling system is lower than the set alarm level, the demineralized water supply valve will automatically open and then close after a delay once the set target level is reached, ensuring that there is sufficient demineralized water in the water tank. When the cooling system is running, the water pump operating frequency is further adjusted by comparing the detected temperature at the drum outlet with the set target temperature. The drain outlet of the drum is connected to the cooler, the outlet of the cooler is connected to the demineralized water tank, and the inlet and outlet pipes of the clean circulating water are connected to the two coolers respectively, each with a manual valve. When the system is working, the demineralized water absorbs heat inside the drum and then enters the cooler through the return water pipe. It is indirectly cooled by the clean circulating water before returning to the water tank, forming a closed loop. The clean circulating water in the cooler does not come into contact with the inside of the drum and only serves as a heat exchange medium, thus avoiding scaling problems.

[0030] Demineralized water is supplied to the water tank via the water supply pipeline and the water replenishment valve; All three pumps are frequency converter controlled, supplying cooling water from the water tank to the rotating drum for cooling; The return water from the drum is piped to the cooler. The cooler uses physical heat exchange between the supply and return water to lower the temperature of the return water, which then flows into the water tank after cooling.

[0031] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A closed-loop circulating cooling system for demineralized water in a high-speed bar production line, characterized in that, include: The drum cooling return water pipeline is connected to the first cooler and the second cooler via pipelines. The first cooler and the second cooler are connected to the water tank via pipelines. The first cooler and the second cooler are connected to each other via pipelines. The water tank is connected to the cooling water supply pipeline for the drum and is also connected to the water replenishment pipeline.

2. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 1, characterized in that, The first cooler is also connected to the first clean circulating water supply pipeline and the first clean circulating water return pipeline, and water valves are installed on both the first clean circulating water supply pipeline and the first clean circulating water return pipeline.

3. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 2, characterized in that, The second cooler is also connected to the second clean circulating water supply pipeline and the second clean circulating water return pipeline, both of which are equipped with water valves.

4. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 3, characterized in that, A first water valve is installed on the pipeline between the blast cooling return water pipeline and the first cooler, and a second water valve is installed on the pipeline between the blast cooling return water pipeline and the second cooler.

5. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 4, characterized in that, A third water valve is installed on the pipeline between the first cooler and the second cooler, a fourth water valve is installed on the pipeline between the first cooler and the water tank, and a fifth water valve is installed on the pipeline between the second cooler and the water tank.

6. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 5, characterized in that, The cooling water pipeline for the rotating drum includes a main pipeline, a first water supply branch pipeline, a second water supply branch pipeline, and a third water supply branch pipeline. The main pipeline is equipped with a sixth water valve and a seventh water valve. The pipeline before the sixth water valve is connected to the water tank via the first water supply branch pipeline. The pipeline between the sixth and seventh water valves is connected to the water tank via the second water supply branch pipeline. The pipeline after the seventh water valve is connected to the water tank via the third water supply branch pipeline.

7. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 6, characterized in that, The first water supply branch includes an eighth water valve, a first water pump, and a ninth water valve, which are connected in series.

8. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 7, characterized in that, The second water supply branch includes a tenth water valve, a second water pump, and an eleventh water valve, which are connected in series.

9. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 8, characterized in that, The third water supply branch includes a twelfth water valve, a third water pump, and a thirteenth water valve, which are connected in series.

10. The closed-loop circulating cooling system for demineralized water in a high-speed bar production line according to claim 9, characterized in that, The water supply pipeline includes a water supply valve, and a bypass water supply pipeline is provided on one side of the water supply valve, and a bypass water supply valve is provided on the bypass water supply pipeline.

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