A new kind of steam removal device for post-rolling cooling

Abstract

The utility model discloses a novel post-rolling cooling steam removing device, comprising: a shell, which is a hollow sealed cavity, two sides coaxially provided with two openings; a condenser pipe is horizontally arranged in the shell, and the condenser pipe is used for passing red steel; a top spraying device, which is at least three top spraying heads arranged in the inner top wall of the shell; two groups of side spraying devices are arranged on the left and right sides of the shell respectively, and each group of side spraying devices comprises at least three side spraying heads extending into the shell; a drain groove is arranged at the bottom of the shell, and an opening is formed in the bottom of the shell and communicates with the drain groove. It solves the problems of low visibility, high safety risk and equipment corrosion caused by steam overflow in the post-rolling cooling area of the bar.

Description

[Technical Field]

[0001] This utility model belongs to the field of post-rolling cooling technology, specifically relating to a novel post-rolling cooling desteam device. [Background Technology]

[0002] In the bar rolling process, the high-temperature rolled sections after finishing rolling need to be rapidly cooled through a cooling system. However, in the low-temperature environment of winter and spring, a large amount of water vapor is generated during the cooling process, causing fog to permeate the production site, with visibility often less than 1 meter. This problem seriously affects the visibility of crane operators over hoisting equipment, increases the safety risks for rolling mill workers during roll changing and equipment inspection, and significantly reduces work efficiency. In addition, the overflowing water vapor carries corrosive components, which can cause continuous corrosion to the steel structure of the plant and electrical equipment, shortening the service life of equipment and increasing maintenance costs.

[0003] While some companies have attempted to install temperature-controlled boxes in cooling areas, using sealed covers and high-pressure circulating water to remove steam, these devices are complex in structure, inconvenient to install and maintain, and have limited cooling and steam absorption effects, failing to meet safety and environmental protection requirements. Therefore, there is an urgent need for a new type of steam removal device that is efficient, easy to install, and can significantly reduce steam overflow. [Utility Model Content]

[0004] The purpose of this invention is to provide a novel post-rolling cooling steam removal device to solve the problems of low visibility, high safety risks, and equipment corrosion caused by steam overflow in the post-rolling cooling area of ​​bars.

[0005] This utility model adopts the following technical solution: a novel post-rolling cooling and desteaming device, comprising:

[0006] A shell is a hollow, sealed cavity with two coaxial openings on its two sides, which are the inlet and the outlet, respectively. A condenser tube is horizontally installed inside the shell and is coaxial with the two openings. The condenser tube is used to allow red-hot steel to pass through and exit from the outlet.

[0007] A top spray device, comprising at least three top spray heads disposed inside the top wall of a housing; the nozzle of the middle top spray head is positioned downwards, and the top spray heads on both sides are inclined towards the middle; the angle between the inclined direction of the top spray heads on both sides and the vertical direction is 30°.

[0008] Two sets of side spray devices are respectively set on the left and right sides of the housing. Each set of side spray devices includes at least three side spray heads extending into the housing. The spray head of the middle side spray head points horizontally towards the condenser pipe, and the side spray heads on the upper and lower sides are inclined towards the middle. The angle between the inclined direction of the side spray heads on both sides and the horizontal direction is 30°, and the spray angle of the side spray heads is 60°.

[0009] A drainage trough is located at the bottom of the housing, and an opening communicating with the drainage trough is provided at the bottom of the housing.

[0010] Furthermore, each spray head has a spray angle of 60°, and adjacent spray heads are arranged at equal intervals of 50-60cm.

[0011] Furthermore, both the top spray device and the side spray device are equipped with valves, flow meters, and pressure pumps.

[0012] Furthermore, a transparent observation window is provided on the top of the casing.

[0013] Furthermore, the outer covers of the housing, top spray device, and side spray device are equipped with protective covers.

[0014] The beneficial effects of this invention are as follows: By spraying cooling water through nozzles evenly distributed within the casing, a dense water curtain or mist spray area is formed, allowing water vapor to fully contact the cooling water. Under the same water pressure, water temperature, and cooling length conditions, the cooling efficiency is increased by 10% to 20% compared to traditional temperature control devices, and the temperature after cooling can be reduced by 50°C, ensuring that the rolled piece quickly reaches the required process temperature and improving production efficiency. The reduction in steam overflow effectively reduces the corrosion of the plant and equipment by water vapor, extends the service life of steel structures and electrical components, and reduces maintenance costs. Furthermore, the device treats steam through physical condensation, eliminating the need for additional chemical agents and meeting the requirements of green production and environmental protection.

[0015] This utility model discloses a novel post-rolling cooling desteamer with a modular design. The shell is fixed to the cooling area by wedges, allowing for quick installation, replacement, or troubleshooting without complex tools, significantly reducing downtime and improving operational efficiency. Simultaneously, the detachable structure facilitates regular cleaning of internal slag, reducing employee workload and meeting the high-frequency maintenance needs of steel production sites. [Attached Image Description]

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] The components are: 1. shell, 2. inlet, 3. outlet, 4. condenser pipe, 5. top nozzle, and 6. side nozzle. 【Detailed Implementation Methods】

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] This utility model provides a novel post-rolling cooling and desteaming device, such as... Figure 1 As shown, it includes:

[0020] A housing 1 is a hollow sealed cavity with two coaxial openings on its two sides, namely an inlet 2 and an outlet 3; a condenser tube 4 is horizontally arranged inside the housing 1, and the condenser tube 4 is coaxial with the two openings; the condenser tube 4 is used for passing through red steel and exiting from the outlet 3.

[0021] A top spray device comprises at least three top spray heads 5 disposed inside the top wall of the housing 1; the nozzle of the middle top spray head 5 is disposed downwards, and the top spray heads 5 on both sides are inclined towards the middle; the angle between the inclination direction of the inclined top spray heads 5 on both sides and the vertical direction is 30°; that is, the left top spray head 5 is installed 30° to the right, the middle top spray head 5 is installed vertically, and the right top spray head 5 is installed 30° to the left. By superimposing the spray, horizontal water vapor is eliminated, ensuring the defogging effect is maximized.

[0022] Two sets of side spray devices are respectively arranged on the left and right sides of the housing 1. Each set of side spray devices includes at least three side nozzles 6 extending into the housing 1. The nozzle of the middle side nozzle 6 is horizontally pointed towards the condenser pipe 4, and the side nozzles 6 on the upper and lower sides are inclined towards the middle. The angle between the inclination direction of the side nozzles 6 on both sides and the horizontal direction is 30°, and the spray angle of the side nozzles 6 is 60°. That is, in the side spray device, the upper side nozzle 6 is installed facing down 30° and the lower side nozzle 6 is installed facing up 30°. By superimposing the spray, the vertical water vapor is eliminated, ensuring the demisting effect is maximized.

[0023] A drain trough is provided at the bottom of the housing 1, and the bottom of the housing 1 has an opening communicating with the drain trough. It is used to drain the water after the steam has condensed.

[0024] This invention uses a "water curtain barrier" formed by a nozzle array to condense steam into water droplets. Tests have shown that this increases visibility in the finishing rolling area from less than 1 meter to over 5 meters, achieving a steam elimination rate of 72.3% and reducing the accident rate for crane operators by 90%. The sprayed water both eliminates steam and assists in cooling. Under conditions of an inlet water temperature of 25℃ and a pressure of 0.4MPa, the final cooling temperature of the rolled piece is reduced by 50℃ compared to traditional methods (from 250℃ to 200℃), and the cooling efficiency is improved by 15-18%. Compared to induced draft demisters, this invention requires no additional power source, saving approximately 120,000 yuan in electricity costs annually (based on 24-hour continuous production).

[0025] In some embodiments, the spray angle of each spray head 5 is 60°, and adjacent spray heads 5 are arranged at equal intervals of 50-60cm.

[0026] In some embodiments, both the top spray device and the side spray device are equipped with water distributors at their inlets, and both devices are equipped with valves, flow meters, and booster pumps. These are used to regulate the water flow rate and pressure of each nozzle, thereby controlling the cooling effect.

[0027] In some embodiments, a transparent viewing window is provided on the top of the sealed housing. The transparent viewing window design facilitates real-time monitoring of the internal status.

[0028] In some embodiments, the housing 1, the top spray device, and the side spray device are equipped with protective covers. The housing is made of 10mm steel plate with a sealed structure, and the protective cover design, which is fixed with wedges, can effectively prevent steam from escaping. At the same time, the sprayed water condenses the water vapor into small water droplets and discharges them through the drain outlet, reducing steam overflow from the cooling area by more than 70%, significantly reducing on-site fog, and significantly improving visibility. This greatly reduces the safety hazards of vehicle operation and manual inspection, and improves the working environment.

[0029] The method of using this device is as follows:

[0030] Installation and Commissioning: Secure the housing to the top or side of the cooling area after the bar finishing roll using wedges, ensuring the housing covers the entire steam generation area. Connect the outer threaded end of the housing to an external water source (such as a circulating cooling water network) via a metal hose, ensuring the water pressure is stable at 0.3–0.5 MPa; simultaneously connect the metal hose to the drain outlet at the bottom of the housing, leading to the drainage trough under the platform. After installation, turn on the water source for a test spray, checking the nozzle atomization effect and the unobstructed flow of the drain outlet. Adjust the housing position so that the spray area completely covers the cooling path of the rolled piece.

[0031] Production Operation: When the high-temperature rolled bars enter the cooling zone, the water supply to the unit is simultaneously turned on, and cooling water is sprayed into the steam cooling chamber inside the shell through nozzles. The steam generated by the contact between the high-temperature rolled piece and the cooling water rises into the shell, fully contacts the sprayed water, and is condensed into small water droplets. These droplets are discharged into the return water pool through the drain outlet at the bottom of the shell via a metal hose, achieving steam circulation. During operation, operators can monitor the steam condensation effect inside the shell in real time through an observation window or external monitoring equipment, adjusting the spray water pressure or the number of nozzles according to the production rhythm and steam volume.

[0032] Maintenance: Regularly stop the machine to clean the inner wall of the housing and around the nozzles to remove iron oxide scale, water scale, and other impurities, preventing nozzle blockage or affecting condensation efficiency. During cleaning, loosen the wedge, disassemble the housing and remove the nozzle assembly, rinse with high-pressure water or clean mechanically, and then reinstall. Simultaneously, check the sealing of the metal hose connections to prevent water or air leaks, ensuring long-term stable operation of the unit.

Claims

1. A novel post-rolling cooling and desteaming device, characterized in that, include: A housing (1) is a hollow sealed cavity with two coaxial openings on its two sides, namely an inlet (2) and an outlet (3); a condenser tube (4) is horizontally arranged inside the housing (1), and the condenser tube (4) is coaxial with the two openings; the condenser tube (4) is used for passing through red steel and exiting from the outlet (3); A top spray device, comprising at least three top spray heads (5) disposed inside the top wall of the housing (1); the top spray head (5) located in the middle is disposed with its nozzle facing downwards, and the top spray heads (5) located on both sides are inclined towards the middle; the angle between the inclined direction of the top spray heads (5) disposed on both sides and the vertical direction is 30°. Two sets of side spray devices are respectively arranged on the left and right sides of the housing (1). Each set of side spray devices includes at least three side nozzles (6) extending into the housing (1). The nozzle of the middle side nozzle (6) is horizontally pointed to the condenser pipe (4), and the side nozzles (6) on the upper and lower sides are inclined towards the middle. The angle between the inclination direction of the side nozzles (6) on both sides and the horizontal direction is 30°, and the spray angle of the side nozzles (6) is 60°. A drainage channel is provided at the bottom of the housing (1), and the bottom of the housing (1) has an opening that communicates with the drainage channel.

2. The novel post-rolling cooling and desteaming device as described in claim 1, characterized in that, The spray angle of each of the top nozzles (5) is 60°, and the adjacent top nozzles (5) are arranged at equal intervals of 50-60cm.

3. A novel post-rolling cooling and desteaming device as described in claim 1 or 2, characterized in that, Both the top spray device and the side spray device are equipped with valves, flow meters and pressure pumps.

4. A novel post-rolling cooling and desteaming device as described in claim 3, characterized in that, The top of the housing (1) is provided with a transparent observation window.

5. A novel post-rolling cooling and desteaming device as described in claim 3, characterized in that, The outer cover of the housing (1), the top spray device and the side spray device is provided with a protective cover.

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