Ventilation cooling method for hot-rolled coil warehouse machinery

Abstract

The invention discloses a hot-rolled coil warehouse mechanical ventilation cooling method which comprises the following steps: S1) a basement is excavated and arranged below a hot-rolled coil warehouse workshop, the basement is used as an underground ventilation interlayer, and a primary fan is arranged at the end part of the underground ventilation interlayer; s2, an air inlet shutter is arranged on the workshop wall of the hot-rolled coil warehouse, outdoor air enters an air inlet small chamber for containing and buffering the air volume through the air inlet shutter, and then the outdoor air is fed into the underground ventilation interlayer through a first-stage draught fan; and (S3) the air in the underground ventilation interlayer is fed into the hot-rolled coils in the hot-rolled coil warehouse workshop through a second-stage fan, and the hot-rolled coils are subjected to ventilation cooling. The underground ventilation interlayer is arranged below the hot-rolled coil warehouse workshop, outdoor air is introduced into the underground ventilation interlayer through the first-stage fan, and then the air in the underground ventilation interlayer is blown to the surface of a hot-rolled coil through the second-stage fan for air cooling, so that the temperature of the hot-rolled coil can be quickly reduced, and the cooling efficiency is improved; and the overall working efficiency is also improved, and the delivery date of an enterprise is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of nonferrous metal processing, and in particular to a mechanical ventilation cooling method for a hot-rolled coil warehouse. Background Art

[0002] In the process of nonferrous metal processing, after the hot-rolled coil or annealing furnace coil process is completed, the temperature of the hot-rolled coil is still as high as about 350°C. The temperature is too high to enter the next process. At this time, it is necessary to provide a place for the coil to cool the coil to the specified temperature. This area is called a coil warehouse or a flat warehouse in engineering. These high-temperature coils are heavy, large in volume, and high in temperature, resulting in a very large area occupied by the hot-rolled coil warehouse. The traditional cooling method is natural cooling, which takes a long time to reach the specified temperature, reducing work efficiency and causing the company's delivery time to be too long. To this end, we propose a mechanical ventilation cooling method for hot-rolled coil warehouses. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a mechanical ventilation cooling method for a hot-rolled coil warehouse, which can quickly reduce the temperature of the hot-rolled coil, improve the cooling efficiency, and improve the overall work efficiency, which is conducive to shortening the delivery time of the enterprise and can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a hot rolling coil warehouse mechanical ventilation cooling method, comprising the following steps: S1) A basement is excavated under the hot-rolled coil warehouse workshop, and the basement is used as an underground ventilation mezzanine, and a primary fan is installed at the end of the underground ventilation mezzanine; S2) Air inlet shutters are installed on the wall of the hot-rolled coil warehouse. Outdoor air enters the air inlet chamber that accommodates and buffers the air volume through the air inlet shutters, and then is sent into the underground ventilation interlayer through the first-level fan; S3) The air in the underground ventilation interlayer is sent to the hot-rolled coils in the hot-rolled coil warehouse by the secondary fan to ventilate and cool the hot-rolled coils; S4) After the surface temperature of the hot rolled coil drops, the secondary fan is turned off for a period of time, and the heat inside the hot rolled coil is transferred to the surface, and then the secondary fan is turned on to continue cooling it.

[0005] As a preferred technical solution of the present invention, the air inlet chamber is arranged at the end of the hot rolling coil storage workshop and is connected to the air inlet louver part and the underground ventilation interlayer part.

[0006] As a preferred technical solution of the present invention, a filter is provided between the air inlet chamber and the underground ventilation interlayer.

[0007] As a preferred technical solution of the present invention, an air outlet connected to the hot rolling coil storage workshop is arranged on the top of the underground ventilation mezzanine, and a secondary fan is arranged at the air outlet.

[0008] As a preferred technical solution of the present invention, the air outlet is a strip-shaped air outlet, and the cold air delivered by the secondary fan through the air outlet is an attached jet.

[0009] As a preferred technical solution of the present invention, the air outlet and the secondary fan are symmetrically arranged at both ends of the hot-rolled coil, and the wind blown out by the secondary fan through the air outlet is blown onto the circular end surface of the hot-rolled coil.

[0010] As a preferred technical solution of the present invention, a return air vent is opened on the floor of the hot-rolled coil warehouse workshop, and the return air vent is arranged at both ends of the air outlet.

[0011] As a preferred technical solution of the present invention, the air inlet chamber, air inlet louver and primary fan are each provided with two groups, and the two groups of air inlet chamber, air inlet louver and primary fan are symmetrically arranged at both ends of the underground ventilation mezzanine.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: an underground ventilation mezzanine is opened under the hot-rolled coil warehouse workshop, and outdoor air is introduced into the underground ventilation mezzanine through a first-level fan, and then the air in the underground ventilation mezzanine is blown to the surface of the hot-rolled coil by a second-level fan for air cooling, which can quickly reduce the temperature of the hot-rolled coil, improve the cooling efficiency, and improve the overall work efficiency, which is beneficial to shorten the delivery time of the enterprise; since the waste heat of the hot-rolled coil warehouse is very large, the maximum ventilation volume required is also very large. When traditional mechanical ventilation cooling is adopted, the required first-level and second-level air supply system equipment is numerous and difficult to arrange. However, by adopting the structural design of the underground ventilation mezzanine of the present application, the entire basement is both an equipment room and an air flow channel, which is very convenient for equipment maintenance and transportation and improves the utilization rate of land resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the method flow of the present invention; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 For the present invention Figure 2 AA section view; Figure 4 For the present invention Figure 2 BB cross-sectional view.

[0014] In the figure: 1 air inlet louver, 2 filter, 3 primary fan, 4 secondary fan, 5 air outlet, 6 hot rolled coil, 7 return air outlet, 8 air inlet chamber, 9 underground ventilation mezzanine. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-4 The present invention provides a technical solution: a hot rolling coil warehouse mechanical ventilation cooling method, comprising the following steps: S1) a basement is excavated under the hot-rolled coil warehouse, the basement serves as an underground ventilation interlayer 9, and a primary fan 3 is arranged at the end of the underground ventilation interlayer 9, and outdoor air is introduced into the underground ventilation interlayer 9 through the primary fan 3; S2) An air inlet louver 1 is provided on the wall of the hot-rolled coil warehouse, and the outdoor air enters the air inlet chamber 8 for accommodating and buffering the air volume through the air inlet louver 1, and then is sent into the underground ventilation interlayer 9 through the primary fan 3; S3) The air in the underground ventilation interlayer 9 is sent by the secondary fan 4 to the hot-rolled coils 6 in the hot-rolled coil warehouse to ventilate and cool the hot-rolled coils 6; S4) In order to save energy as much as possible, the secondary fan 4 can be turned on intermittently. After the secondary axial flow fan is turned on for a period of time, the surface temperature of the hot-rolled coil 6 decreases, but the internal temperature of the hot-rolled coil 6 is still high, and the heat cannot be transferred to the surface of the hot-rolled coil 6 in time. At this time, the secondary fan 4 continues to run, which has a poor cooling effect and will cause energy waste. At this time, the secondary fan 4 should stop running, and wait until the internal heat of the hot-rolled coil 6 is transferred to the surface, and then turn on the secondary fan 4 to continue cooling it.

[0017] The secondary fan 4 can be turned on or off according to the demand of each hot rolled coil and can be controlled manually or by computer.

[0018] By opening an underground ventilation interlayer 9 under the hot-rolled coil warehouse workshop, and introducing outdoor air into the underground ventilation interlayer 9 through the first-level fan 3, and then the second-level fan 4 blows the air in the underground ventilation interlayer 9 to the surface of the hot-rolled coil 6 for air cooling, the temperature of the hot-rolled coil 6 can be quickly reduced, the cooling efficiency is improved, and the overall work efficiency is also improved, which is conducive to shortening the delivery time of the enterprise; since the waste heat of the hot-rolled coil warehouse is very large, the maximum ventilation volume required is also very large. When traditional mechanical ventilation cooling is adopted, the required first-level and second-level air supply system equipment is numerous and difficult to arrange. However, by adopting the structural design of the underground ventilation interlayer 9 of the present application, the entire basement is both an equipment room and an air flow channel, which is very convenient for equipment maintenance and transportation and improves the utilization rate of land resources.

[0019] Since the hot-rolled coil warehouse has the characteristics of relatively large changes in production load, and the cooling air volume required for hot-rolled coils will also change greatly with the change of outdoor air temperature. A two-stage air supply system is set up. The first-stage system controls the number of fans to be turned on according to the pressure in the underground ventilation interlayer and the temperature of the hot-rolled coil warehouse to adjust the air supply volume. The second-stage fan starts and stops according to the demand of the hot-rolled coils served. This two-stage air supply system can well adapt to the changes in the production load of the coil warehouse and can be adjusted flexibly. It is a very energy-saving operation mode.

[0020] The preferred technical solution is that the air inlet chamber 8 is arranged at the end of the hot rolling coil warehouse workshop and is connected to the hot rolling coil warehouse workshop part and the underground ventilation interlayer 9 part up and down. The air inlet chamber 8 is used to buffer the air volume; a filter 2 is arranged between the air inlet chamber 8 and the underground ventilation interlayer 9, which can filter the outdoor air, reduce the dust and larger particles entering the underground ventilation interlayer 9, and improve the cleanliness of the underground ventilation interlayer 9 and the hot rolling coil warehouse workshop and the final quality of the hot rolled coil 6.

[0021] A preferred technical solution is that an air outlet 5 connected to the hot rolling coil warehouse workshop is provided at the top of the underground ventilation interlayer 9, and a secondary fan 4 is provided at the air outlet 5. The secondary fan 4 blows the air in the underground ventilation interlayer 9 through the air outlet 5 to the hot rolling coil warehouse workshop.

[0022] A further preferred technical solution is that, since the heat resistance of the circular end face of the hot-rolled coil is relatively small, the air outlet 5 and the secondary fan 4 are symmetrically arranged at both ends of the hot-rolled coil 6, and the wind blown out by the secondary fan 4 through the air outlet 5 is blown onto the circular end face of the hot-rolled coil 6. Limited by the plane layout of the hot-rolled coil warehouse, only two sides around the hot-rolled coil can be provided with air outlets. Therefore, the air outlet is arranged close to the circular end face of the hot-rolled coil.

[0023] Furthermore, the air outlet 5 is a strip-shaped air outlet, and the cold air sent out by the secondary fan 4 through the air outlet 5 is an attached jet, which can greatly increase the air flow speed on the surface of the hot-rolled coil and improve the cooling rate of the hot-rolled coil. At the same time, the flat-designed air outlet can cover the circular end surface of the aluminum coil with a small air volume. Compared with other air outlets, the air heat exchange efficiency is greatly improved, and the power consumption of the secondary air supply system is effectively reduced.

[0024] The preferred technical solution is that a return air vent 7 is provided on the floor of the hot-rolled coil warehouse workshop, and the return air vent 7 is arranged at both ends of the air outlet 5. In order to improve the heat transfer coefficient of the hot-rolled coil surface, it is necessary to increase the wind speed on its surface. Although the design adopts strip air vents, attached jets and other designs to minimize the air volume of the secondary fan, the total air supply volume of the secondary air supply system is still very large. However, due to the limitation of the thermal conductivity of the hot-rolled coil itself, the air temperature rises relatively small only through one convection heat exchange with the surface of the hot-rolled coil. When the outdoor air temperature is relatively low, directly discharging this part of the low-temperature air into the atmosphere will cause the primary air supply system to have too much air supply and waste energy. For this reason, the present application also opens a return air vent on the floor of the hot-rolled coil warehouse, and increases the amount of workshop air entering the ventilation interlayer from the return air vent by controlling the parameters such as the hot-rolled coil warehouse workshop temperature and the negative pressure of the ventilation interlayer, thereby reducing the air supply volume of the primary air supply system and reducing the operating cost of the primary fan.

[0025] Optionally, a temperature detection point is set in the hot rolling coil storage workshop and a pressure detection point is set in the underground ventilation interlayer structure, which are used to detect the temperature in the hot rolling coil storage workshop and the pressure in the underground ventilation interlayer structure 9, respectively, and flexibly adjust the switch and power of the first-level fan 3 and the second-level fan 4 according to the temperature in the hot rolling coil storage workshop and the pressure in the underground ventilation interlayer structure 9.

[0026] Optionally, when the hot-rolled coil warehouse is large and there are many hot-rolled coils to be cooled, two groups of air inlet chambers 8, air inlet louvers 1 and primary fans 3 can be set up. The two groups of air inlet chambers 8, air inlet louvers 1 and primary fans 3 are symmetrically arranged at both ends of the underground ventilation interlayer 9, so that air can be supplied to the hot-rolled coil warehouse from both sides at the same time, thereby improving the cooling efficiency.

[0027] Further, in order to better dissipate the waste heat inside the workshop, so that there is no heat accumulation inside the workshop and the heat is discharged evenly and efficiently, a roof axial flow fan unit and a temperature sensor can be installed on the roof of the workshop. Mechanical exhaust and temperature detection devices are set up in different areas to meet the needs of local enhanced heat dissipation. When the roof temperature exceeds a certain set value, it means that the waste heat inside the workshop cannot be discharged efficiently. At this time, the axial flow fan on the roof of the workshop should be turned on to put the workshop in a mechanical exhaust state, thereby making the waste heat discharge process more efficient and uniform.

[0028] The undisclosed parts in the present invention are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hot rolling coil warehouse mechanical ventilation cooling method, characterized in that: The following steps are involved: S1) A basement is excavated under the hot-rolled coil warehouse, which is used as an underground ventilation mezzanine, and a primary fan is installed at the end of the underground ventilation mezzanine; S2) Air inlet shutters are installed on the wall of the hot-rolled coil warehouse. Outdoor air enters the air inlet chamber that accommodates and buffers the air volume through the air inlet shutters, and then is sent into the underground ventilation interlayer through the first-level fan; S3) The air in the underground ventilation interlayer is sent to the hot-rolled coils in the hot-rolled coil warehouse by the secondary fan to ventilate and cool the hot-rolled coils; S4) After the surface temperature of the hot rolled coil drops, the secondary fan is turned off for a period of time, and the heat inside the hot rolled coil is transferred to the surface, and then the secondary fan is turned on to continue cooling it.

2. A hot rolling coil warehouse mechanical ventilation cooling method according to claim 1, characterized in that: The air inlet chamber is arranged at the end of the hot rolling coil storage workshop and is connected to the air inlet louver part and the underground ventilation interlayer part.

3. A hot rolling coil warehouse mechanical ventilation cooling method according to claim 2, characterized in that: A filter is arranged between the air inlet chamber and the underground ventilation interlayer.

4. A hot rolling coil warehouse mechanical ventilation cooling method according to claim 1, characterized in that: An air outlet connected to the hot-rolled coil storage workshop is arranged on the top of the underground ventilation interlayer, and a secondary fan is arranged at the air outlet.

5. A hot rolling coil warehouse mechanical ventilation cooling method according to claim 4, characterized in that: The air outlet is a strip-shaped air outlet, and the cold air sent out by the secondary fan through the air outlet is an attached jet.

6. A hot rolling coil warehouse mechanical ventilation cooling method according to claim 5, characterized in that: The air outlet and the secondary fan are symmetrically arranged at two ends of the hot-rolled coil, and the air blown out by the secondary fan through the air outlet is blown onto the circular end surface of the hot-rolled coil.

7. A hot rolling coil warehouse mechanical ventilation cooling method according to claim 6, characterized in that: The floor of the hot-rolled coil warehouse is provided with a return air vent, which is arranged at both ends of the air outlet.

8. A hot rolling coil warehouse mechanical ventilation cooling method according to claim 1, characterized in that: The air inlet chamber, the air inlet louver and the first-level fan are each provided with two groups, and the two groups of the air inlet chamber, the air inlet louver and the first-level fan are symmetrically arranged at the two ends of the underground ventilation interlayer.

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