A dual mode water distributor and cooling circulation system for an electric arc furnace

Abstract

The utility model discloses a double mode water distributor for ore heating furnace belongs to ore heating furnace cooling equipment technical field. Including ore heating furnace liquid outlet pipe and water distributor, and water distributor includes backwater collecting pipe, and backwater collecting pipe is equipped with first pipeline, and first pipeline is equipped with first valve, and the bottom of backwater collecting pipe is equipped with backwater collecting groove, and backwater collecting groove is equipped with second pipeline, and first pipeline and second pipeline are connected with ore heating furnace liquid outlet pipe through three -way joint, and the water outlet of backwater collecting pipe and backwater collecting groove is equipped with third valve and fourth valve respectively, and backwater collecting groove is equipped with exhaust port. Still disclose a kind of ore heating furnace cooling circulation system, including water pump, water inlet distributor, ore heating furnace, backwater distributor and cooling tower connected in turn. The double mode water distributor combines closed circuit and open circuit circulation, mainly reduces resource waste and equipment damage with closed circuit, and exhausts with open circuit, guarantees cooling effect and system safety.

Description

Technical Field

[0001] This utility model belongs to the technical field of cooling equipment for submerged arc furnaces, and specifically relates to a dual-mode water distributor and cooling circulation system for submerged arc furnaces. Background Technology

[0002] As a high-temperature metallurgical device, the submerged arc furnace requires an efficient cooling system to ensure its safe operation during production. Currently, water distributors are typically of two types: open-loop circulation systems and closed-loop circulation systems.

[0003] 1. Open-loop circulation system: This system is connected to the external environment. Its advantages include good cooling performance, rapidly removing heat, and also serving as an exhaust system to effectively remove gases from the pipes. Disadvantages include significant water waste, which is detrimental to environmental protection and cost control. Furthermore, prolonged open-loop circulation can lead to the concentration of dissolved salts as water evaporates, causing scaling or corrosion of welds in the electric furnace equipment, resulting in irreversible damage.

[0004] 2. Closed-loop circulation system: This system utilizes coolant through internal circulation. Its advantages include reduced water waste and high economic and environmental benefits. Disadvantages include the potential for gas buildup in the pipes over extended periods, affecting cooling efficiency and posing safety hazards, especially in high-temperature operating environments where gas accumulation could lead to explosions. Utility Model Content

[0005] The purpose of this invention is to provide a dual-mode water distributor and cooling circulation system for a submerged arc furnace, aiming to solve the problems existing in the prior art mentioned above.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A dual-mode water distributor for an electric arc furnace includes an electric arc furnace outlet pipe connected to the electric arc furnace and a water distributor. The water distributor includes a return water collection pipe, a first pipeline with a first valve, a return water collection trough at the bottom of the return water collection pipe, and a second pipeline. The first and second pipelines are connected to the electric arc furnace outlet pipe via a tee connector. The outlet ends of the return water collection pipe and the return water collection trough are respectively equipped with a third valve and a fourth valve. The return water collection trough is equipped with an exhaust port.

[0008] Furthermore, multiple first pipelines are evenly distributed along the axial direction of the return water manifold, and two rows of first pipelines are arranged parallel to each other on both sides of the axis of the return water manifold.

[0009] Furthermore, the exhaust port is an elongated slot extending along the length of the return water collection tank. The bottom end of the second pipe enters the return water collection tank along the elongated slot. Multiple second pipes are evenly distributed along the length of the return water collection tank. Two rows of second pipes are arranged parallel to each other on both sides of the return water collection pipe on the return water collection tank. The elongated slot forms an exhaust observation bed, which facilitates both exhaust and observation of the flow rate and continuity of the coolant and cooling water.

[0010] A cooling circulation system for a submerged arc furnace includes a water pump, a water inlet distributor, a liquid inlet pipe for the submerged arc furnace, a submerged arc furnace, a liquid outlet pipe for the submerged arc furnace, a return water distributor, and a cooling tower connected in sequence by pipelines. The cooling tower is connected to the water pump through pipelines, and the return water distributor adopts the aforementioned dual-mode water distributor.

[0011] Furthermore, the water inlet distributor includes a water inlet header, the water inlet end of which is equipped with a fifth valve, and both the water inlet header and the return water manifold are equipped with pressure transmitters and temperature sensors.

[0012] Furthermore, the inlet pipe of the submerged arc furnace is equipped with a ball valve. The ball valve is used to regulate the flow rate of the coolant entering the submerged arc furnace.

[0013] Furthermore, both the inlet pipe and outlet pipe of the electric arc furnace are equipped with drain connectors, which are used to drain the coolant inside the electric arc furnace.

[0014] Compared with the shortcomings and deficiencies of the existing technology, the present invention has the following beneficial effects:

[0015] This utility model's water distributor combines closed-loop and open-loop circulation through structural design, and is applied to the return water distributor of a submerged arc furnace cooling circulation system. During normal operation of the cooling system, a closed-loop circulation mode is primarily used. In this mode, the cooling water is circulated within the system, significantly reducing water waste. Simultaneously, by avoiding large-scale water vapor evaporation, the probability of dissolved salts in the coolant condensing due to evaporation is effectively reduced, fundamentally lowering the risk of structural problems or weld corrosion in the submerged arc furnace equipment, providing strong protection for the long-term operation of the equipment. When the system requires venting, the open-loop circulation mode plays a crucial role. This mode can conveniently and efficiently expel accumulated gas in the pipelines, ensuring that the cooling system's heat dissipation efficiency remains at a high level, which is beneficial to improving the safety of the entire cooling circulation system.

[0016] Pressure transmitters and temperature sensors are installed in the inlet and outlet manifolds, respectively, to monitor the pressure and temperature values ​​in the submerged arc furnace's inlet and outlet pipes in real time with precision. The pressure transmitters provide real-time feedback of the system's operating pressure, enabling timely detection of abnormal pressure fluctuations caused by factors such as pipe blockage or gas accumulation. The temperature sensors monitor coolant temperature changes in real time, allowing for timely intervention when the temperature exceeds a set threshold. The combined operation of these two sensors helps ensure the safe operation of the submerged arc furnace's cooling circulation system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the dual-mode water distributor in this utility model.

[0018] Figure 2 This is a side view of the dual-mode water distributor in this utility model.

[0019] Figure 3 This is a schematic diagram of the coolant flow path in the heat exchange cooling circulation system of this utility model.

[0020] Figure 4 This is a schematic diagram of the water inlet distributor in this utility model.

[0021] Figure 5 This is a side view of the water inlet distributor in this utility model.

[0022] In the diagram: 10. Return water manifold; 11. First pipeline; 12. First valve; 13. Third valve; 20. Return water collection tank; 21. Second pipeline; 22. Second valve; 23. Exhaust port; 24. Fourth valve; 30. Submersible furnace outlet pipe; 31. Ball valve; 32. Drain connector; 33. Submersible furnace inlet pipe; 40. Return water distributor; 50. Cooling tower; 60. Water pump; 70. Inlet water distributor; 71. Inlet main pipe; 72. Fifth valve; 80. Submersible furnace; 81. Pressure transmitter; 82. Temperature sensor. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Example 1

[0025] This embodiment discloses a dual-mode water distributor for an electric arc furnace. The water distributor is used in the cooling circulation system of the electric arc furnace to realize open-loop or closed-loop circulation of cooling water.

[0026] Reference Figure 1The water distributor includes a return water collection pipe 10 and a return water collection tank 20. The return water collection tank 20 is arranged horizontally, and a support leg is provided at the bottom of the return water collection tank 20. The return water collection pipe 10 is arranged horizontally at the top of the return water collection tank 20.

[0027] The return water manifold 10 is provided with a first pipe 11 connected to it. The first pipe 11 is connected to the molten metal furnace outlet pipe 30. The first pipe 11 is provided with a first valve 12, which is used to control the opening and closing of the first pipe 11. Multiple first pipes 11 are evenly spaced along the axial direction of the return water manifold 10. In this embodiment, viewed along the axial direction of the return water manifold 10, two rows of first pipes 11 are arranged parallel to each other on both sides of the axis of the return water manifold 10. The first pipes 11 are arranged vertically, with their bottom ends connected to the return water manifold 10 and their top ends connected to the molten metal furnace outlet pipe 30 through a tee connector.

[0028] The return water collection tank 20 is equipped with a second pipe 21 connected to it. The second pipe 21 is connected to the outlet pipe 30 of the electric arc furnace. The second pipe 21 is equipped with a second valve 22, which is used to control the opening and closing of the second pipe 21. The return water collection tank 20 is equipped with an exhaust port 23. In this embodiment, the exhaust port 23 is a long slot extending along the length of the return water collection tank 20. The upper part of the return water collection tank 20 located on both sides of the return water collection pipe 10 is symmetrically provided with long slots. The second pipe 21 is arranged vertically. The bottom end of the second pipe 21 passes through the long slot into the return water collection tank 20, and the top end is connected to the outlet pipe 30 of the electric arc furnace through one interface of a tee connector. When viewed along the axial direction of the return water collection pipe 10, two rows of second pipes 21 are arranged parallel to each other on both sides of the return water collection tank 20. The exhaust port 23 forms an exhaust observation window, which is used for venting and for observing the opening and closing of the water flow, the flow rate, and the turbidity of the water.

[0029] Reference Figure 2 The outlet end of the return water manifold 10 is equipped with a third valve 13, which is used to control the opening and closing of the return water manifold 10. The outlet end of the return water collection tank 20 is equipped with a fourth valve 24, which is used to control the opening and closing of the return water collection tank 20.

[0030] The first valve 11, the second valve 21, the third valve 13, and the fourth valve 24 can be manual or electric valves. The specific model can be selected from commercially available products according to actual needs.

[0031] Example 2

[0032] Reference Figure 3This embodiment discloses a cooling circulation system for a submerged arc furnace, including a water pump 60, an inlet water distributor 70, a submerged arc furnace 80, a return water distributor 40 and a cooling tower 50 connected in sequence by pipelines. The cooling tower 50 is connected to the water pump 60 by pipelines, thereby forming a circulating cooling system for heat dissipation of the submerged arc furnace. The return water distributor 40 adopts the water distributor in Embodiment 1.

[0033] Reference Figure 4 and Figure 5 The water inlet distributor 70 includes a water inlet header 71, with a support leg at the bottom of the water inlet header 71. A fifth valve 72 is provided at the water inlet end of the water inlet header 70, which is used to control the opening and closing of the water inlet header.

[0034] The electric arc furnace 80 has internal channels for the flow of coolant. The cooling water inlet of the electric arc furnace 80 is connected to the electric arc furnace inlet pipe 33, and the cooling water outlet is connected to the electric arc furnace outlet pipe 30. The electric arc furnace inlet pipe 33 is connected to the water inlet header 72, and the electric arc furnace outlet pipe 30 is connected to the return water distributor 40.

[0035] A ball valve 31 is provided on the inlet pipe 33 of the electric arc furnace near the water distributor 70. The ball valve 31 is used to control the opening and closing of the inlet pipe 30 of the electric arc furnace and to adjust the flow rate of the coolant introduced into the electric arc furnace 80.

[0036] In closed-loop circulation mode, the cooling water in the molten metal furnace outlet pipe 30 flows sequentially through the tee joint, the first pipe 21, the return water collection pipe 20, and the cooling tower 50. In open-loop circulation mode, the cooling water in the molten metal furnace outlet pipe 30 flows sequentially through the tee joint, the second pipe 21, the return water collection tank 20, and the cooling tower 50.

[0037] The inlet header 71 is equipped with a pressure transmitter 81 and a temperature sensor 82 to detect the pressure within the pipeline and the temperature of the cooling water entering the submerged arc furnace 80. The return water manifold 10 is equipped with a pressure transmitter 81 and a temperature sensor 82 to detect the pressure within the pipeline during closed-loop circulation and the temperature of the cooling water exiting the submerged arc furnace 80. The return water collection tank 20 is equipped with a temperature sensor 82 (not shown in the figure) to detect the temperature of the cooling water exiting the submerged arc furnace 80 during open-loop circulation.

[0038] Both the inlet pipe 33 and the storage pipe 30 of the electric arc furnace are equipped with a drain connector 32, which is used to discharge the cooling water in the electric arc furnace 80 through the drain connector by an air compressor when the electric arc furnace fails.

[0039] Working principle:

[0040] In the submerged arc furnace cooling circulation system, the coolant is sequentially delivered by water pump 60 to the inlet water distributor 70, the submerged arc furnace inlet pipe 33, the submerged arc furnace 80, the submerged arc furnace outlet pipe 30, the return water distributor 40, and the cooling tower 50, and finally flows into water pump 60 for circulating cooling of the submerged arc furnace. The return water distributor 40 adopts a dual-mode water distributor, forming a closed-loop circulation and an open-loop circulation for the coolant flow.

[0041] The cooling circulation system of the electric arc furnace includes three modes.

[0042] The first mode uses only closed-loop circulation. The cooling water in the outlet pipe 30 of the electric arc furnace flows through the first pipe 11 and the return water collection pipe 10 before flowing into the cooling tower 50.

[0043] The second mode uses only open-loop circulation. The cooling water in the molten metal furnace outlet pipe 30 flows through the second pipe 21 and the return water collection tank 20 before flowing into the cooling tower 50.

[0044] The third mode primarily uses closed-loop circulation, supplemented by open-loop circulation. During the operation of the electric arc furnace, closed-loop circulation is activated. When venting is required, the second valve 22 of the second pipeline 21 is partially opened, and the gas is discharged through the vent 23 on the return water collection tank 20, ensuring the safe operation of the electric arc furnace cooling circulation system. Closed-loop circulation reduces water evaporation, thereby reducing water waste and mitigating the risk of dissolved salts in the coolant accumulating due to water evaporation, which could lead to scaling or corrosion of welds in the electric furnace equipment and damage to the equipment.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual mode water distributor for an arc furnace, comprising an arc furnace outlet pipe (30) connected to the arc furnace and a water distributor, characterized in that, The water distributor includes a return water collection pipe (10), the return water collection pipe (10) is provided with a first pipe (11), the first pipe (11) is provided with a first valve (12), the bottom of the return water collection pipe (10) is provided with a return water collection trough (20), the return water collection trough (20) is provided with a second pipe (21), the second pipe (21) is provided with a second valve (22), the first pipe (11) and the second pipe (21) are connected to the liquid outlet pipe (30) of the electric arc furnace through a three-way connector, the outlet ends of the return water collection pipe (10) and the return water collection trough (20) are respectively provided with a third valve (13) and a fourth valve (24), and the return water collection trough (20) is provided with an exhaust port (23).

2. The dual-mode water distributor as described in claim 1, characterized in that, Multiple first pipelines (11) are evenly arranged along the axial direction of the return water collection pipe (10), and two rows of first pipelines (11) are arranged in parallel on both sides of the axis of the return water collection pipe (10).

3. The dual-mode water distributor as described in claim 2, characterized in that, The exhaust port (23) is a long slot hole. The long slot hole extends along the length of the return water collection tank (20). The bottom end of the second pipe (21) passes through the return water collection tank (20) along the long slot hole. Multiple second pipes (21) are evenly arranged along the length of the return water collection tank (20). Two rows of second pipes (21) are arranged parallel to each other on both sides of the return water collection pipe (10) on the return water collection tank (20).

4. A cooling circulation system for a submerged arc furnace, characterized in that, The system includes a water pump (60), a water inlet distributor (70), a ferroelectric furnace inlet pipe (33), a ferroelectric furnace (80), a ferroelectric furnace outlet pipe (30), a return water distributor (40), and a cooling tower (50) connected in sequence by pipelines. The cooling tower (50) is connected to the water pump (60) by pipelines. The return water distributor (40) is a dual-mode water distributor as described in any one of claims 1-3.

5. The submerged arc furnace cooling circulation system as described in claim 4, characterized in that, The water inlet distributor (70) includes a water inlet header (71), and a fifth valve (72) is provided at the water inlet end of the water inlet header (71). Both the water inlet header (71) and the return water collection pipe (10) are provided with a pressure transmitter (81) and a temperature sensor (82).

6. The submerged arc furnace cooling circulation system as described in claim 4, characterized in that, The inlet pipe (33) of the electric arc furnace is equipped with a ball valve (31).

7. The submerged arc furnace cooling circulation system as described in claim 4, characterized in that, Both the inlet pipe (33) and outlet pipe (30) of the electric arc furnace are equipped with drain connectors (32), which are used to drain the coolant inside the electric arc furnace (80).

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