Water vapor discharging device during cooling of water quenching tank

Abstract

The utility model relates to the technical field of cold-rolled strip steel after-treatment equipment in the metallurgical industry, and particularly discloses a water vapor discharging device during cooling of a water quenching tank, which comprises a water quenching tank body, and a strip steel inlet box body and a strip steel outlet box body are respectively arranged on two sides of the water quenching tank body; the inlet box body and the outlet box body are each provided with a flange connector, and the diameter of each flange connector is DN200. The two ends of the main pipeline are respectively connected with the flange interfaces of the inlet box body and the outlet box body in a sealing manner; the mist exhaust fan is communicated with the main pipeline through a branch pipeline; the sewage pit is connected with an outlet of the mist discharging fan through a discharging pipeline; the main pipeline and the branch pipelines are arranged below a floor of the operation platform; according to the device, through reasonable layout, good sealing, corrosion-resistant design, intelligent control and safety guarantee, efficient steam exhaust, reliable operation, energy conservation and consumption reduction are achieved, the safety performance is high, the production efficiency is effectively improved, and the service life of equipment is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of post-processing equipment for cold-rolled strip steel in the metallurgical industry, and specifically discloses a water vapor discharge device during water quenching tank cooling. Background Technology

[0002] In steel production, the water quenching tank is a key piece of equipment for cooling strip steel, generating a large amount of high-temperature steam during the cooling process. Traditional steam exhaust systems for water quenching tanks often suffer from poor sealing performance, easy pipe corrosion, and low steam exhaust efficiency. Some systems use ordinary material pipes, which are prone to rust and damage in high-temperature and high-humidity environments, leading to frequent replacements and increased maintenance costs. Other systems have unreasonable pipe layouts, resulting in high steam exhaust resistance and difficulty in quickly and effectively removing steam from the water quenching tank. This not only affects the cooling effect of the strip steel but also causes excessive humidity in the workshop over a long period, corroding equipment and affecting the working environment of operators.

[0003] Therefore, there is an urgent need for a steam discharge device with a reasonable structure and stable performance to improve the efficiency and reliability of steam discharge during the cooling process of the water quenching tank. Utility Model Content

[0004] This utility model proposes a steam discharge device for water quenching tank cooling. Through reasonable pipeline layout, good sealing design, selection of corrosion-resistant materials, intelligent control system and safety protection measures, the steam discharge device achieves efficient steam discharge, ensures reliable operation of the device, extends equipment service life, saves energy, and improves production safety and economy.

[0005] This utility model is implemented as follows: a water vapor discharge device during water quenching tank cooling, comprising:

[0006] The water quenching tank body has a strip steel inlet box and a strip steel outlet box on both sides respectively;

[0007] Both the inlet and outlet boxes are equipped with flange interfaces, and the diameter of the flange interfaces is DN200.

[0008] The main pipe is made of polypropylene (PPH), and its two ends are sealed to the flange interfaces of the inlet box and the outlet box, respectively.

[0009] The defogging fan is connected to the main pipe via a branch pipe;

[0010] The sewage pit is connected to the outlet of the mist exhaust fan via a discharge pipe;

[0011] Both the main pipeline and the branch pipelines are located below the floor of the operating platform and are kept at a distance from the steel structure floor.

[0012] As a preferred embodiment of the water vapor discharge device for cooling a water quenching tank according to this utility model, the flange interfaces are symmetrically arranged at the top center of the inlet box and the outlet box, and the two flange interfaces are respectively connected to the inner cavity of the inlet box and the strip steel outlet box. The sealing surface of the flange interface is made of silicone rubber gasket that can withstand temperatures above 200°C.

[0013] As a preferred embodiment of the water vapor discharge device for cooling a water quenching tank according to this utility model, the main pipe and branch pipes made of polypropylene (PPH) have a wall thickness of 8-10mm, the inner walls of the main pipe and branch pipes are smooth and the outer walls are provided with reinforcing ribs, and the connection between the main pipe and branch pipes is made by hot melt welding.

[0014] As a preferred embodiment of the water vapor discharge device for cooling a water quenching tank according to this utility model, the main pipe is arranged horizontally along the length of the water quenching tank body, the branch pipe is connected to the main pipe through a Y-shaped tee, and the branch pipe is inclined upward at an angle of 10° to 15° to form a negative pressure drainage structure.

[0015] As a preferred embodiment of the water vapor discharge device for cooling a water quenching tank according to this utility model, the de-fogging fan is a corrosion-resistant axial flow fan, and its air inlet is equipped with a filter module. The filter module includes a multi-layer stainless steel filter screen and a cyclone centrifugal water vapor separator. The mesh size of the stainless steel filter screen is 80-100 mesh.

[0016] As a preferred embodiment of the water vapor discharge device for cooling a water quenching tank according to this utility model, the end of the discharge pipe is inserted below the liquid surface of the sewage pit, a pressure relief valve is provided at the top of the sewage pit, and the inner wall of the discharge pipe is coated with a polytetrafluoroethylene anti-corrosion layer with a thickness of 0.5-1mm.

[0017] As a preferred embodiment of the water vapor discharge device for cooling a water quenching tank according to this utility model, it further includes a control system, the control system comprising:

[0018] A humidity sensor is installed on the steel structure floor of the water quenching tank body;

[0019] A programmable logic controller (PLC) is electrically connected to the humidity sensor and the de-fogging fan, and dynamically adjusts the fan speed based on humidity data.

[0020] Differential pressure sensors are installed at the inlets of the main pipeline and the branch pipeline;

[0021] The alarm module is an audible and visual alarm that is linked to a differential pressure sensor. When an abnormal pressure is detected in the main pipeline or branch pipeline, or when the mist exhaust fan malfunctions, the audible and visual alarm is triggered.

[0022] The beneficial effects of this utility model are:

[0023] 1. A reasonable pipeline layout and negative pressure drainage structure can quickly and effectively discharge the steam generated in the water quenching tank, ensuring the cooling effect of the strip steel and improving production efficiency; the flange interface is sealed with silicone rubber gaskets that can withstand temperatures above 200℃, and the connection between the main pipeline and the branch pipeline adopts hot melt welding process to effectively prevent steam leakage, ensure the reliability of the equipment operation, and avoid the impact of steam leakage on the workshop environment and equipment.

[0024] 2. The main and branch pipes are made of polypropylene (PPH), the axial flow fan is corrosion resistant, and the discharge pipe is coated with polytetrafluoroethylene for corrosion protection. This enables the equipment to adapt to high temperature and high humidity steam environment, extend the service life of the equipment, and reduce maintenance costs.

[0025] 3. The control system monitors humidity in real time through a humidity sensor, and the programmable logic controller dynamically adjusts the fan speed according to the humidity data to realize intelligent control of steam discharge. While ensuring effective steam discharge, it saves energy and improves the economy and rationality of equipment operation.

[0026] 4. The pressure relief valve at the top of the sewage pit releases pressure when the pressure is too high. The alarm module triggers an alarm when the pipeline pressure is abnormal or the fan fails, reminding staff to deal with the fault in time, ensuring the safe and stable operation of the equipment and improving production safety. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0029] Figure 2 This is a schematic diagram of the structure of the discharge pipe and the polytetrafluoroethylene anti-corrosion layer of this utility model.

[0030] Figure 3 This is a schematic diagram of the stainless steel filter screen and cyclone centrifugal water vapor separator of this utility model.

[0031] Figure 4 This is a schematic diagram of the branch pipe and reinforcing rib of this utility model.

[0032] The markings in the diagram are: 1. Water quenching tank body; 2. Inlet housing; 3. Outlet housing; 4. Flange interface; 5. Main pipeline; 6. Exhaust fan; 7. Branch pipeline; 8. Sewage pit; 9. Discharge pipeline; 10. Reinforcing rib; 11. Y-shaped tee; 12. Filter module; 13. Stainless steel filter screen; 14. Cyclone centrifugal water vapor separator; 15. Pressure relief valve; 16. PTFE anti-corrosion layer; 17. Humidity sensor; 18. Programmable logic controller; 20. Alarm module. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0034] Please see Figure 1-4 A water vapor removal device for cooling a water quenching tank, comprising:

[0035] The water quenching tank body 1 has a steel strip inlet box 2 and a steel strip outlet box 3 on its two sides respectively;

[0036] Both the inlet housing 2 and the outlet housing 3 are equipped with flange interfaces 4, and the diameter of the flange interfaces 4 is DN200.

[0037] The main pipe 5 is made of polypropylene (PPH), and its two ends are sealed to the flange interfaces 4 of the inlet box 2 and the outlet box 3, respectively.

[0038] The demisting fan 6 is connected to the main pipe 5 via a branch pipe 7;

[0039] The sewage pit 8 is connected to the outlet of the mist exhaust fan 6 via the discharge pipe 9;

[0040] Both the main pipe 5 and the branch pipe 7 are located below the floor of the operating platform and are kept at a distance from the steel structure ground.

[0041] In this embodiment: the water quenching tank body 1 is the main equipment for strip steel cooling, providing a place for strip steel cooling. The strip steel inlet box 2 and strip steel outlet box 3 set on both sides provide channels for strip steel to enter and exit the water quenching tank, and also provide connection interfaces for steam exhaust devices, ensuring the continuity of the strip steel cooling process, and restricting steam inside the box to prevent disorderly diffusion of steam into the workshop environment, facilitating centralized and safe steam exhaust; two flange interfaces 4 are symmetrically arranged at the top center of the inlet box 2 and outlet box 3, and connected to the main pipe 5 to prevent steam leakage; the mist exhaust fan 6 is connected to the main pipe 5 through the branch pipe 7, serving as the power source for steam exhaust, extracting steam in the main pipe 5 and transporting it to the sewage pit 8;

[0042] During cooling operation, the water quenching tank 1 generates high-temperature steam while cooling the strip steel. The steam enters the main polypropylene (PPH) pipe 5 through the flange interface 4 at the top of the strip steel inlet box 2 and the strip steel outlet box 3. After the de-fogging fan 6 starts, it creates a negative pressure in the main pipe 5 through the branch pipe 7, drawing the steam out of the main pipe 5. Because the branch pipe 7 is inclined upward at 10° to 15° to form a negative pressure diversion structure, it enhances the steam flow dynamics, allowing the steam to flow more smoothly towards the de-fogging fan 6. The steam passes through the filter module 12 at the air inlet of the de-fogging fan 6, where the multi-layer stainless steel filter screen 13 passes through... Impurities in the steam are filtered out by the cyclone centrifugal water vapor separator 14, which separates water vapor. The cleaned steam is then transported to the sewage pit 8 through the discharge pipe 9. The end of the discharge pipe 9 is inserted below the liquid surface of the sewage pit 8 to prevent steam from overflowing. At the same time, the humidity sensor 17 monitors the humidity at the steel structure ground of the water quenching tank body 1 in real time and transmits the data to the programmable logic controller 18. The programmable logic controller 18 dynamically adjusts the speed of the de-icing fan 6 according to the humidity data to adapt to different steam generation amounts. When the pressure in the pipeline is abnormal or the fan malfunctions, the alarm module 20 triggers an audible and visual alarm to remind the staff to handle the situation.

[0043] As a technical optimization of this utility model, the flange interface 4 is symmetrically arranged at the top center of the inlet box 2 and the outlet box 3, and the two flange interfaces 4 are respectively connected to the inner cavity of the inlet box 2 and the steel strip outlet box 3. The sealing surface of the flange interface 4 is made of silicone rubber gasket that can withstand temperatures above 200℃.

[0044] In this embodiment: the symmetrical arrangement at the top center position ensures the uniformity of steam collection; the flange sealing surface uses silicone rubber gaskets that can withstand temperatures above 200℃, which enhances the sealing performance, adapts to high-temperature steam environments, prevents steam leakage, and improves the reliability and stability of the device operation.

[0045] As a technical optimization of this utility model, the main pipe 5 and branch pipe 7 made of polypropylene (PPH) have a wall thickness of 8-10mm. The inner walls of the main pipe 5 and branch pipe 7 are smooth and the outer walls are reinforced with ribs 10. The connection between the main pipe 5 and branch pipe 7 is achieved by hot-melt welding.

[0046] In this embodiment, the PPH material, specific wall thickness, smooth inner wall, and reinforcing ribs 10 design ensure the corrosion resistance, strength, and transportation efficiency of the pipeline; the hot-melt welding process ensures a tight pipeline connection, reduces the risk of leakage, extends the service life of the pipeline, and reduces maintenance costs.

[0047] As a technical optimization of this utility model, the main pipe 5 is arranged horizontally along the length of the water quenching tank body 1, and the branch pipe 7 is connected to the main pipe 5 through a Y-shaped tee 11. The branch pipe 7 is inclined upward at an angle of 10° to 15° to form a negative pressure drainage structure.

[0048] In this embodiment: the main pipe 5 is arranged horizontally along the length of the water quenching tank body 1 to facilitate steam collection; the branch pipe 7 is inclined upward at 10° to 15° to form a negative pressure drainage structure, which utilizes the principle of gas flow to enhance the steam transport power, improve the steam discharge efficiency, avoid steam accumulation in the pipe, and ensure the smooth discharge of steam. One end of the Y-shaped tee 11 is directly connected to the axial direction of the main pipe 5, and the other end is connected to the branch pipe 7 at an elevation angle of 10° to 15°. The third end blind flange is equipped with a blind flange or an adjustable air valve to balance the pipe pressure or to close it during maintenance.

[0049] As a technical optimization of this utility model, the defogging fan 6 is a corrosion-resistant axial flow fan, and its air inlet is equipped with a filter module 12. The filter module 12 includes a multi-layer stainless steel filter screen 13 and a cyclone centrifugal water vapor separator 14. The stainless steel filter screen 13 has a mesh size of 80-100 mesh.

[0050] In this embodiment: the corrosion-resistant axial flow fan adapts to the steam environment, preventing the fan from being corroded; the filter module 12 can effectively filter impurities in the steam and separate water vapor, ensuring the cleanliness of the discharged gas, protecting downstream equipment, reducing equipment maintenance and damage risks, and improving the overall performance and service life of the device.

[0051] As a technical optimization of this utility model, the end of the discharge pipe 9 is inserted below the liquid level of the sewage pit 8, the top of the sewage pit 8 is provided with a pressure relief valve 15, and the inner wall of the discharge pipe 9 is coated with a polytetrafluoroethylene anti-corrosion layer 16, the thickness of which is 0.5-1mm.

[0052] In this embodiment: the end of the discharge pipe 9 is inserted below the liquid level of the sewage pit 8 to prevent steam from overflowing and ensure the sealing of the steam treatment; the pressure relief valve 15 at the top of the sewage pit 8 releases pressure when the pressure is too high to ensure the safe operation of the system; the inner wall of the discharge pipe 9 is coated with a polytetrafluoroethylene anti-corrosion layer 16 to enhance the corrosion resistance of the pipe, extend the service life of the pipe, and ensure the smooth discharge of steam and condensate.

[0053] As a technical optimization of this utility model, it also includes a control system, which includes:

[0054] Humidity sensor 17 is installed on the steel structure floor of the water quenching tank body 1;

[0055] The programmable logic controller 18 is electrically connected to the humidity sensor 17 and the de-fogging fan 6, and dynamically adjusts the fan speed according to the humidity data;

[0056] Differential pressure sensor 19 is installed at the inlet of main pipeline 5 and branch pipeline 7;

[0057] Alarm module 20 is an audible and visual alarm. Alarm module 20 is linked with differential pressure sensor 19. When abnormal pressure is detected in the main pipeline 5 or branch pipeline 7, or when the mist exhaust fan 6 malfunctions, the audible and visual alarm is triggered.

[0058] In this embodiment, a control system is added, including a humidity sensor 17, a programmable logic controller 18, a differential pressure sensor 19, and an alarm module 20. The differential pressure sensor 19 monitors the pressure inside the pipeline, the humidity sensor 17 monitors the humidity in real time, and the programmable logic controller 18 dynamically adjusts the fan speed based on the humidity data to achieve intelligent control and save energy. The alarm module 20 triggers an alarm when the pipeline pressure is abnormal or the fan malfunctions, reminding staff to handle the fault in a timely manner, ensuring the safe and stable operation of the device, and improving the safety and reliability of production.

[0059] Working principle and usage process of this utility model:

[0060] The strip steel enters the water quenching tank body 1 for cooling, generating a large amount of high-temperature steam. The steam enters the main pipe 5 through the flange interface 4 at the top of the strip steel inlet box 2 and the strip steel outlet box 3. The sealing design of the flange interface 4 prevents steam leakage. The de-fogging fan 6 starts, creating negative pressure in the main pipe 5 and the branch pipe 7. Due to the inclined design of the branch pipe 7, the steam flow is enhanced, guiding the steam in the main pipe 5 towards the de-fogging fan 6. When the steam passes through the air inlet of the de-fogging fan 6, the filter module 12 filters and separates the water vapor, removing impurities and moisture. The treated steam passes through the exhaust fan. The steam is discharged through pipe 9 to the sewage pit 8. The end of pipe 9 is inserted below the surface of the sewage pit 8 to ensure effective collection of steam. Humidity sensor 17 monitors the ambient humidity around the water quenching tank in real time and feeds the data back to programmable logic controller 18. Programmable logic controller 18 adjusts the speed of the de-fogging fan 6 according to the humidity data. When the humidity is high, the fan speed is increased to speed up the steam discharge. When the humidity is low, the fan speed is reduced to save energy. If the pressure in the pipeline is abnormal or the fan malfunctions, alarm module 20 triggers an audible and visual alarm, and staff promptly inspect and repair the equipment.

[0061] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A steam removal device for water quenching tank cooling, characterized in that, include: The water quenching tank body (1) has a steel strip inlet box (2) and a steel strip outlet box (3) on its two sides respectively. Both the inlet box (2) and the outlet box (3) are provided with flange interfaces (4), and the diameter of the flange interfaces (4) is DN200; The main pipe (5) is made of polypropylene (PPH), and its two ends are sealed to the flange interfaces (4) of the inlet box (2) and the outlet box (3) respectively. The demisting fan (6) is connected to the main pipe (5) through a branch pipe (7); The sewage pit (8) is connected to the outlet of the mist exhaust fan (6) via a discharge pipe (9); The main pipe (5) and the branch pipe (7) are both located below the floor of the operating platform and are kept at a distance from the steel structure ground.

2. The water vapor discharge device for water quenching tank cooling according to claim 1, characterized in that: The flange interfaces (4) are symmetrically arranged at the top center of the inlet box (2) and the outlet box (3), and the two flange interfaces (4) are respectively connected to the inner cavity of the inlet box (2) and the steel strip outlet box (3). The sealing surface of the flange interfaces (4) is made of silicone rubber gaskets that can withstand temperatures above 200°C.

3. The water vapor discharge device for cooling a water quenching tank according to claim 1, characterized in that: The main pipe (5) and branch pipe (7) made of polypropylene (PPH) have a wall thickness of 8-10 mm. The inner wall of the main pipe (5) and branch pipe (7) is smooth and the outer wall is reinforced with ribs (10). The connection between the main pipe (5) and branch pipe (7) is made by hot melt welding.

4. The water vapor discharge device for cooling a water quenching tank according to claim 1, characterized in that: The main pipe (5) is arranged horizontally along the length of the water quenching tank body (1). The branch pipe (7) is connected to the main pipe (5) through a Y-shaped tee (11). The branch pipe (7) is inclined upward at an angle of 10° to 15° to form a negative pressure drainage structure.

5. A steam discharge device for water quenching tank cooling according to claim 1, characterized in that: The de-fogging fan (6) is a corrosion-resistant axial flow fan, and its air inlet is equipped with a filter module (12). The filter module (12) includes a multi-layer stainless steel filter screen (13) and a cyclone centrifugal water vapor separator (14). The stainless steel filter screen (13) has a mesh size of 80-100 mesh.

6. The water vapor discharge device for cooling a water quenching tank according to claim 1, characterized in that: The end of the discharge pipe (9) is inserted below the liquid level of the sewage pit (8). A pressure relief valve (15) is provided at the top of the sewage pit (8). The inner wall of the discharge pipe (9) is coated with a polytetrafluoroethylene anti-corrosion layer (16), and the thickness of the polytetrafluoroethylene anti-corrosion layer (16) is 0.5-1mm.

7. A steam removal device for water quenching tank cooling according to claim 1, characterized in that: It also includes a control system, which includes: A humidity sensor (17) is installed on the steel structure ground of the water quenching tank body (1); A programmable logic controller (18) is electrically connected to the humidity sensor (17) and the de-fogging fan (6), and dynamically adjusts the fan speed according to the humidity data; Differential pressure sensor (19) is installed at the inlet of the main pipeline (5) and the branch pipeline (7); Alarm module (20), the alarm module (20) is an audible and visual alarm, the alarm module (20) is linked with differential pressure sensor (19), and the audible and visual alarm is triggered when abnormal pressure is detected in the main pipeline (5) or branch pipeline (7) or when the mist exhaust fan (6) malfunctions.

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