Cooling water pipe for blast furnace

Abstract

The utility model relates to the technical field of blast furnace cooling, and provides a cooling water pipe for a blast furnace, the cooling water pipe is provided with a group of threads at set length intervals along the axial direction, and each group of threads comprises three sections of threads; the three sections of threads are separated from one another and are evenly arranged in the circumferential direction of the cooling water pipe. The three sections of threads protrude out of the inner surface of the cooling water pipe, and the three sections of threads have the same rotating direction which is clockwise or anticlockwise at the same time. The three sections of threads are arranged at intervals of 120 degrees in the circumferential direction. The utility model has the beneficial effects that through the innovative design of introducing the built-in spiral threads, the heat exchange efficiency and fluid dynamic performance of fluid in the water pipe are obviously improved. According to the design, the fluid flowing path is optimized, mixing and heat transfer between fluids are enhanced, wide application potential is achieved, and a new solution is provided for high-efficiency heat energy management.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace cooling, in particular to a cooling water pipe for a blast furnace. Background Art

[0002] Blast furnace cooling is crucial for ensuring the long-term stability and smooth operation of ironmaking. Controlling cooling water usage stabilizes the operating conditions of the furnace shell. With the implementation of new technologies, the operating conditions within the blast furnace undergo varying degrees of change, significantly impacting the load-bearing capacity of the furnace structure. In particular, changes in the temperature field within the blast furnace place higher demands on heat dissipation from the furnace shell. At the same time, reducing cooling water usage is imperative for both environmental protection and operational efficiency. This necessitates the adoption of new cooling devices that achieve higher cooling efficiency while using lower water volumes.

[0003] Cooling water pipes are an important component of blast furnace cooling. The internal structure design of cooling water pipes is expected to improve the water flow state and enhance the heat exchange efficiency. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a blast furnace cooling water pipe that significantly improves the heat exchange efficiency of the fluid inside the pipe. The design promotes turbulent flow of the fluid through the internal spiral structure, enhancing mixing between the fluid layers, thereby improving the efficiency of heat energy transfer.

[0005] The utility model adopts the following technical solutions:

[0006] A cooling water pipe for a blast furnace is provided with a set of threads at intervals of a set length along the axial direction, wherein the set of threads includes three sections of threads; the three sections of threads are separated from each other and evenly arranged along the circumference of the cooling water pipe.

[0007] Any possible implementation as described above further provides an implementation, wherein the three sections of threads all protrude from the inner surface of the cooling water pipe, and the three sections of threads have the same rotation direction, which is simultaneously clockwise or simultaneously counterclockwise; the three sections of threads are arranged circumferentially at intervals of 120°.

[0008] As for any possible implementation described above, an implementation is further provided, wherein the geometric features of each thread segment in the three thread segments are the same, and the height of each thread segment above the inner surface of the cooling water pipe is 20% to 40% of the diameter of the cooling water pipe.

[0009] As for any possible implementation described above, an implementation is further provided, wherein the length of each of the three thread sections is 1.5-3 times the diameter of the cooling water pipe.

[0010] As for any possible implementation described above, there is further provided an implementation, wherein the length of each of the three thread sections is twice the diameter of the cooling water pipe.

[0011] As for any possible implementation described above, a further implementation is provided, wherein the set length is 4 times the diameter of the cooling water pipe.

[0012] As for any possible implementation described above, an implementation is further provided, wherein the outer contour of each of the three thread sections is a smooth curve shape, and the height of the middle portion of the thread is greater than the height of the end portion.

[0013] As for any possible implementation described above, there is further provided an implementation, wherein the cooling water pipe is made of stainless steel.

[0014] The beneficial effects of this utility model are as follows: by introducing an innovative design with built-in spiral threads, the utility model significantly improves the heat exchange efficiency and fluid dynamics of the fluid within the water pipe. This design not only optimizes the fluid flow path and enhances mixing and heat transfer between fluids, but also has a wide range of application potential, providing a new solution for high-efficiency thermal energy management. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic structural diagram of a cooling water pipe for a blast furnace according to an embodiment of the present utility model.

[0016] In the figure: 1-water pipe body; 2-first section of thread; 3-second section of thread; 4-third section of thread. DETAILED DESCRIPTION

[0017] The following will describe in detail specific embodiments of the present invention with reference to the accompanying drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated, and they can be combined with each other to achieve better technical effects.

[0018] like Figure 1 As shown, an embodiment of the utility model is a cooling water pipe for a blast furnace, in which a group of threads is arranged at intervals of a set length along the axial direction, and the group of threads includes three sections of threads; the three sections of threads are separated from each other and evenly arranged along the circumference of the cooling water pipe.

[0019] In a specific embodiment, the three sections of threads all protrude from the inner surface of the cooling water pipe, and the three sections of threads have the same rotation direction, which is simultaneously clockwise or simultaneously counterclockwise; the three sections of threads are arranged at intervals of 120° along the circumferential direction.

[0020] In a specific embodiment, the geometric features of each thread segment of the three thread segments are the same, and the height of each thread segment above the inner surface of the cooling water pipe is 20% to 40% of the diameter of the cooling water pipe.

[0021] In a specific embodiment, the length of each of the three thread sections is 1.5-3 times the diameter of the cooling water pipe.

[0022] In a specific embodiment, the length of each of the three thread sections is twice the diameter of the cooling water pipe.

[0023] In a specific embodiment, the set length is 4 times the diameter of the water pipe.

[0024] In a specific embodiment, the outer contour of each of the three thread sections is a smooth curve shape, and the height of the middle portion of the thread is greater than the height of the end portion.

[0025] In a specific embodiment, the cooling water pipe is made of stainless steel.

[0026] Traditional threaded internal pipes offer significant resistance to water flow, requiring users to increase water pressure to achieve optimal heat transfer. This new design features a three-section thread that allows water to circulate clockwise or counterclockwise, similar to brewing a potion and stirring it for a better mixing effect. This ensures a uniform water temperature, unlike conventional pipes where the edges are hotter and the center is cooler. These pipes are spaced apart to maintain this constant stirring. This unique design also increases water flow and reduces resistance, resulting in better heat dissipation.

[0027] Due to the improvement of the spiral design on fluid flow, the spiral inner water pipe designed by this utility model can increase the Reynolds number by 10% compared with the straight pipe, making the fluid turbulence stronger. Generally, the pipe diameter D is 0.02m, and the water flow velocity v is 1.6m / s. At this time, the flat Reynolds number of the straight pipe is calculated according to the formula The calculated Re is 32000, where the dynamic viscosity of the water is μ = 1×10 - 3 Pa·s. The Nusselt number (Nu) is a dimensionless number that describes the heat exchange efficiency inside the pipe. It can be calculated using the Reynolds number and the Prandtl number (Pr), that is, Nu=0.03Re 0.8 Pr 0.4 Wherein, the Prandtl number is calculated according to the formula Calculation shows that the specific heat capacity of water Cp = 4.186 kJ / (kg·K). According to the formula for calculating the convection heat transfer coefficient: The thermal conductivity k of water is approximately 0.6W / (m·K), and the pipe diameter D is 0.02m. Based on this calculation, under the same inlet and outlet temperature conditions, i.e., an inlet water temperature of 25°C and an outlet water temperature of 30°C, the water flow velocity of the water pipe designed using this utility model is only 1.53m / s, which can significantly save cooling water consumption.

[0028] Although several embodiments of the present invention have been described herein, those skilled in the art will appreciate that modifications may be made to the embodiments herein without departing from the spirit of the present invention. The above embodiments are merely illustrative and should not be used as limitations on the scope of the present invention.

Claims

1. A cooling water pipe for a blast furnace, characterized in that: The cooling water pipe is provided with a set of threads at intervals of a set length along the axial direction, and the set of threads includes three sections of threads; the three sections of threads are separated from each other and evenly arranged along the circumference of the cooling water pipe; The three sections of threads all protrude from the inner surface of the cooling water pipe, and the three sections of threads have the same rotation direction, which is simultaneously clockwise or simultaneously counterclockwise; the three sections of threads are arranged at intervals of 120° along the circumferential direction.

2. The cooling water pipe for a blast furnace according to claim 1, characterized in that: The geometric features of each thread segment in the three thread segments are the same, and the height of each thread segment above the inner surface of the cooling water pipe is 20% to 40% of the diameter of the cooling water pipe.

3. The cooling water pipe for a blast furnace according to claim 1, characterized in that: The length of each of the three thread sections is 1.5-3 times the diameter of the cooling water pipe.

4. The cooling water pipe for a blast furnace according to claim 3, characterized in that: The length of each of the three thread sections is twice the diameter of the cooling water pipe.

5. The cooling water pipe for a blast furnace according to claim 1, characterized in that: The set length is 4 times the diameter of the cooling water pipe.

6. The cooling water pipe for a blast furnace according to claim 1, characterized in that: The outer contour of each of the three thread sections is a smooth curve shape, and the height of the middle portion of the thread is greater than the height of the end portion.

7. The cooling water pipe for a blast furnace according to claim 1, characterized in that: The cooling water pipe is made of stainless steel.

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