Flue gas collecting cover of rolling mill

Abstract

The utility model relates to a rolling mill flue gas collecting hood, which relates to the field of rolling mill waste gas treatment, and comprises a collecting hood, a door assembly, an internal flue, a gas-liquid separator, an external flue and a flue gas collector, the collecting hood covers the whole rolling mill, the collecting hood is provided with the door assembly for personnel to go in and out, the internal flue is fixedly arranged at the top end inside the collecting hood, and the gas-liquid separator is arranged on the external flue. One end of the internal flue is closed, the other end of the internal flue is connected to a gas-liquid separator, the gas-liquid separator is fixedly arranged on the outer wall of the collecting cover, and a liquid outlet and a gas outlet are formed in the gas-liquid separator. According to the utility model, the liquid outlet of the gas-liquid separator is connected with the liquid outlet pipe, and the liquid outlet pipe guides the emulsion separated by the gas-liquid separator to the emulsion pool for recycling, so that the emulsion separated from the flue gas can be reutilized, and the waste of the emulsion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill exhaust gas treatment, and in particular to a rolling mill flue gas collection hood. Background Technology

[0002] Continuous casting and rolling, also known as continuous casting and rolling, is an aluminum manufacturing process in which molten aluminum is introduced into a continuous casting machine to cast aluminum billets, which are then straightened by straightening equipment and directly rolled into shape in a hot continuous rolling mill. The main equipment includes casting machines, rolling mills, and winding machines. In a continuous casting and rolling production line, the rolling mill is exposed to the air during production, and the fumes generated are directly emitted into the workshop, causing environmental pollution and posing safety hazards. Therefore, it is necessary to treat the fumes generated by the rolling mill.

[0003] Currently, Chinese utility model patent application with publication number CN215998061U and publication date of March 11, 2022, proposes a flue gas collection hood and flue gas collection system for rolling mills, including a dust collection hood and an exhaust hood; the dust collection hood is hollow and can be installed outside the rolling mill; the exhaust hood has a conical hollow structure with a larger opening at one end and a smaller opening at the other end; the larger opening end of the exhaust hood is connected to one side of the dust collection hood and is in communication with it.

[0004] When in use, the dust collection hood is installed outside the rolling mill. The exhaust gas inside the dust collection hood flows into the exhaust hood through the larger opening and then flows out through the smaller opening.

[0005] In order to reduce the temperature of the rolls and rolled pieces during the rolling process, emulsions are usually used for cooling and lubrication. However, these emulsions may partially evaporate or atomize during use, forming oil mist, which then mixes with the flue gas. In response to the above-mentioned technologies, the flue gas is discharged uniformly when collecting it, resulting in the waste of emulsion. Utility Model Content

[0006] In order to separate the emulsion in the flue gas and reduce the waste of the emulsion, this utility model provides a rolling mill flue gas collection hood.

[0007] This utility model provides a rolling mill flue gas collection hood, which adopts the following technical solution:

[0008] A rolling mill flue gas collection hood includes: a collection hood, an internal flue, a gas-liquid separator, and an external flue; the collection hood is installed outside the rolling mill, the gas-liquid separator is provided with an air inlet, a liquid outlet, and an air outlet, the gas-liquid separator is fixedly installed on the outer wall of the collection hood, and the liquid outlet of the gas-liquid separator is connected to a liquid outlet pipe; the internal flue is located inside and above the collection hood, the internal flue is provided with multiple smoke inlets, one end of the internal flue is closed, and the other end is connected to the air inlet of the gas-liquid separator; the external flue is located outside the collection hood, one end of the external flue is connected to the air outlet of the gas-liquid separator, and the other end of the external flue is connected to the flue gas collector.

[0009] By adopting the above technical solution, the collection hood is installed outside the rolling mill to completely cover it. A suction force is generated by the flue gas collector, which flows through the external flue into the internal flue. The suction port on the internal flue draws in the smoke and dust inside the collection hood. The flue gas first enters the gas-liquid separator through the internal flue, separating the gas and liquid components. The separated liquid is the rolling mill emulsion, which is recovered through the outlet pipe. The separated gas enters the flue gas collector for further purification and discharge. This allows for the unified collection and centralized disposal of flue gas around the rolling mill, and the separation and reuse of the rolling mill emulsion. On the one hand, it organizes and recovers the flue gas around the rolling mill, improving the surrounding environment; on the other hand, it allows for the separation and reuse of the emulsion, reducing waste.

[0010] Optionally, the collection hood includes a support frame, a sealing plate, and a door assembly. The sealing plate is sealed on the four sides and the top surface of the support frame. A door frame is provided on the sealing plate on at least one side of the support frame, and the door assembly is disposed in the door frame.

[0011] By adopting the above technical solution, the installation process involves first constructing a support frame around the rolling mill, then installing sealing plates on the constructed support frame for sealing, and finally creating door frames on the sealing plates. Installing the door components into these door frames completes the entire collection hood installation. This method of using sealing plates on the support frame allows for flexible shaping of the collection hood according to the surrounding environment and site conditions, increasing its versatility in application scenarios.

[0012] Optionally, the door assembly includes a guide rail, an outer door, and an inner door. The guide rail is disposed at the bottom and / or top of the door frame and is disposed along the width direction of the door frame. Both the inner door and the outer door are slidably disposed in the guide rail.

[0013] By adopting the above technical solution, both the outer and inner doors can slide open or close in the guide rail, which greatly increases the opening degree of the entire door assembly, reduces the probability of the door frame or door panel occupying space and blocking the material when conveying material into the rolling mill, and facilitates the transportation of materials to the vicinity of the rolling mill.

[0014] Optionally, the guide rail is located at the bottom of the door frame, and guide wheels are provided below both the inner door and the outer door.

[0015] By adopting the above technical solution, the guide rail is set at the bottom of the door frame, and guide rail wheels are installed at the bottom of the inner and outer doors. When the door is opened or closed, the guide rail wheels roll in the guide rail, and the guide rail can restrict and guide the guide rail wheels, reducing the probability of the inner and outer doors falling off the guide rail.

[0016] Optionally, the outer door is provided with two outer door handles, which are respectively located on both sides of the end face of the outer door away from the inner door; two handle grooves are respectively provided on both sides of the inner door, and two handle seats are provided in the handle grooves in the vertical direction. The inner door handle is rotatably installed in the handle seat, and the inner door handle is rotatably installed in the handle seat in the vertical direction.

[0017] By adopting the above technical solution, the inner door handle can rotate within the handle base and fold into the handle groove. When the outer door is opened, it pushes the inner door handle, causing it to rotate within the handle base and fold into the handle groove. When the inner door needs to be opened, the inner door handle can be rotated out of the handle groove. This rotating and foldable structure of the inner door handle reduces the probability of interference or collision between the inner and outer door handles, allowing for closer placement of the inner and outer doors and saving floor space.

[0018] Optionally, the inner door and the outer door are staggered, and both the end face of the inner door facing the outer door and the end face of the outer door facing the inner door are provided with door seals, which are arranged in the vertical direction.

[0019] By adopting the above technical solution, the door sealing design reduces the probability of flue gas leaking from the gap between the outer and inner doors, and increases the sealing performance of the collection hood.

[0020] Optionally, guide rail seals are also provided on the inner end faces of both sides of the guide rail, wherein one side of the guide rail seal is sealed to the end face of the outer door away from the inner door, and the other side of the guide rail seal is sealed to the end face of the inner door away from the outer door.

[0021] By adopting the above technical solution, the guide rail seal reduces the probability of flue gas leaking from the gap between the guide rail and the inner or outer door, further increasing the sealing performance of the collection hood and improving the surrounding environment.

[0022] Optionally, a support frame is provided at the top of the internal flue, the top of the support frame is fixed to the collection cover at the top by bolts, and the bottom of the support frame is connected to the internal flue by bolts.

[0023] By adopting the above technical solution, the support frame allows the internal flue to be better supported on the sealing plate, increasing the contact area between the sealing plate and the internal flue, and increasing the stability of the internal flue support.

[0024] In summary, this utility model has at least one of the following beneficial technical effects:

[0025] By installing a gas-liquid separator on the collection hood, the emulsion in the flue gas can be separated for secondary use, reducing the waste of the emulsion.

[0026] By setting the door on the collection hood to a sliding push-pull structure, the door can be opened to a greater extent, making it easier to transport materials to the vicinity of the rolling mill for loading during rolling mill operation.

[0027] 3. A sealing structure is installed between the doors of the collection hood and between the door guide rails to improve the sealing performance of the collection hood and reduce flue gas leakage. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0029] Figure 2 This is an exploded view of the overall structure of an embodiment of this utility model;

[0030] Figure 3 This is a top view of the overall structure of an embodiment of this utility model;

[0031] Figure 4 yes Figure 2 A magnified view of part I in the middle;

[0032] Figure 5 yes Figure 2 A magnified view of a portion of section II;

[0033] Figure 6 yes Figure 2 A magnified view of a portion of section III;

[0034] Figure 7 yes Figure 5 A schematic diagram of the inner door handle in the open position.

[0035] Explanation of reference numerals in the attached drawings: 1. Collection hood; 11. Support frame; 12. Sealing plate; 121. Door frame; 13. Door assembly; 131. Guide rail; 132. Outer door; 1321. Outer door handle; 1322. Guide rail wheel; 133. Inner door; 1331. Inner door handle; 1332. Handle groove; 1333. Handle seat; 134. Guide rail seal; 135. Door seal; 2. Internal flue; 21. Smoke vent; 22. Support frame; 3. Gas-liquid separator; 4. External flue; 5. Smoke collector. Detailed Implementation

[0036] The following combination Figures 1 to 7 The present invention will be described in further detail below.

[0037] This utility model discloses a rolling mill flue gas collection hood. (Refer to...) Figures 1 to 3 A rolling mill flue gas collection hood mainly includes a collection hood 1, a door assembly 13, an internal flue 2, a gas-liquid separator 3, an external flue 4, and a flue gas collector 5. The collection hood 1 covers the entire rolling mill. A door assembly 13 for personnel to enter and exit is provided on one side of the collection hood 1. The internal flue 2 is fixedly installed at the top inside the collection hood 1. One end of the internal flue 2 is closed, and the other end is connected to the gas-liquid separator 3. The gas-liquid separator 3 is fixedly installed on the outer wall of the collection hood 1. The gas-liquid separator 3 is provided with a liquid outlet and a gas outlet. The liquid outlet is connected to a liquid outlet pipe, which guides the emulsion separated by the gas-liquid separator 3 to the emulsion pool for recycling. The gas outlet of the gas-liquid separator 3 is connected to the flue gas collector 5 through the external flue 4.

[0038] When in use, the flue gas collector 5 is turned on, generating suction and transmitting it to the internal flue duct 2. The internal flue duct 2 attracts and collects the smoke and dust around the rolling mill. The internal flue duct 2 first transports the flue gas to the gas-liquid separator 3, which separates the gas and solids in the flue gas and transports them together to the flue gas collector 5. The gas-liquid separator 3 separates the liquid in the flue gas and transports it to the emulsion tank. In this way, the flue gas near the rolling mill is collected in a unified manner, and the emulsion in the flue gas is separated for recycling and reuse. This not only improves the environment around the rolling mill and reduces pollution, but also reduces the waste of rolling mill emulsion.

[0039] Reference Figures 1 to 2 The collection cover 1 includes a support frame 11, a sealing plate 12, and a door assembly 13. The support frame 11 is made of stainless steel pipe welded together and has a rectangular frame shape. The sealing plate 12 is made of stainless steel sheet welded onto the support frame 11. The sealing plate 12 welds and seals the top surface and four sides of the support frame 11. The sealing plate 12 is cut in half on one of the larger sides to install the door frame 121. The door assembly 13 is installed in the door frame 121.

[0040] Reference Figure 2 and Figure 4 The door assembly 13 includes a guide rail 131, an outer door 132, and an inner door 133. The guide rail 131 is made of two steel bars welded to a stainless steel tube at the bottom of the support frame 11, which serve as the outer and inner edges of the guide rail 131, respectively. There are a total of 6 inner doors 133 and outer doors 132, which are arranged alternately in a pattern of one inner door 133 and one outer door 132. Two guide wheels 1322 are installed at the bottom of both the inner door 133 and the outer door 132. The guide wheels 1322 slide in the guide rail 131. In order to reduce the probability of the inner door 133 and the outer door 132 tipping over, a sliding groove is also provided above the door frame 121 to limit the sliding of the inner door 133 and the outer door 132. The sliding groove is correspondingly set with the guide rail 131.

[0041] Reference Figure 5 and Figure 7 To facilitate opening and closing of the inner door 133 and the outer door 132, two outer door handles are fixedly installed on both sides of the outer door 132 away from the inner door 133. Two handle grooves 1332 are provided on both sides of the inner door 133 near the outer door 132. Two inner door handles 133 are fixedly installed on the upper and lower ends of the handle grooves 1332 by screws. A circular hole is provided in the middle of the handle base 1333. The inner door handles 133 are inserted into the circular hole of the handle base 1333 and can rotate in the handle base 1333.

[0042] In this way, when the outer door 132 is opened and the outer door 132 and the inner door 133 overlap, the handle of the inner door 133 can be rotated and folded into the handle groove 1332, which can reduce the impact of the handle of the inner door 133 on the outer door 132. When the handle of the inner door 133 is pulled to open the inner door 133, the handle of the inner door 133 can be rotated out of the handle groove 1332 first, making it convenient to pull the handle of the inner door 133 to move the inner door 133.

[0043] Reference Figure 4 and Figure 6 To increase the sealing performance of the collection hood 1 and reduce the probability of flue gas leakage from the collection hood 1, an inter-door seal 135 is provided on the end face of the outer door 132 facing the inner door 133. The inter-door seal 135 is a silicone sealing strip fixedly installed on the outer door 132, and the two sealing strips are respectively set along the two vertical edges of the outer door 132. At the same time, guide rail seals 134 are also provided on the edge of the guide rail 131 near the outer door 132 and the edge of the guide rail 131 near the inner door 133. The guide rail seal 134 is a silicone sealing strip fixedly installed on the guide rail 131. The silicone sealing strips on the guide rail 131 are respectively in contact with the inner door 133 and the outer door 132 for sealing.

[0044] Reference Figure 2The internal flue 2 is a metal square tube flue. Multiple smoke inlets 21 are opened at the bottom of the internal flue 2. A support frame 22 is installed at the top of the internal flue 2. The support frame 22 is fixed to the top of the internal flue 2 with screws and to the sealing plate 12 at the top with screws. When the flue gas collector 5 is working, it draws the flue gas around the rolling mill into the internal flue 2 through the smoke inlets 21 and first sends it to the gas-liquid separator 3. Some of the emulsion vapor condenses into emulsion in the gas-liquid separator 3 and returns to the emulsion pool for recycling. The remaining emulsion vapor and flue gas are continuously drawn out of the production workshop through the external flue 4 and collected into the flue gas collector 5 for purification before being discharged.

[0045] The implementation principle of a mill flue gas collection hood according to this utility model embodiment is as follows: When installing the collection hood 1, a support frame 11 is first built around the mill, covering the entire mill. Then, a sealing plate 12 is welded on the support frame 11 to form the overall outline of the collection hood 1. After cutting a door frame 121 on one side of the sealing plate 12, the door assembly 13 is installed in the door frame 121 to complete the construction of the entire collection hood 1. When in use, the flue gas collector 5 draws the flue gas around the mill into the internal flue 2 through the smoke inlet 21. The flue gas in the internal flue 2 first enters the gas-liquid separator 3. The gas-liquid separator 3 separates part of the emulsion in the flue gas and transports it to the emulsion pool for recycling through the liquid outlet pipe. The remaining emulsion vapor enters the flue gas collector 5 through the external flue 4 with the flue gas and is discharged after purification treatment.

[0046] In summary, by adding a gas-liquid separator 3 to the collection hood 1, this application can separate some of the emulsion in the flue gas for secondary use, reducing the waste of the emulsion; by setting the inner door 133 and outer door 132 on the collection hood 1 as a sliding push-pull structure, the opening degree of the entire door assembly 13 is greatly increased, reducing the probability that the door frame 121 or door assembly 13 will occupy space and obstruct the material transportation when conveying materials to the rolling mill, and facilitating the transportation of materials to the vicinity of the rolling mill; by setting a sealing structure between the inner door 133 and outer door 132 of the collection hood 1, and between the inner door 133 and guide rail 131 and the outer door 132 and guide rail 131, the sealing performance of the collection hood 1 can be improved, reducing flue gas leakage.

[0047] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A rolling mill flue gas collection hood, characterized in that, include: Collection hood (1), internal flue (2), gas-liquid separator (3) and external flue (4); The collection hood (1) is installed outside the rolling mill. The gas-liquid separator (3) is provided with an air inlet, a liquid outlet and an air outlet. The gas-liquid separator (3) is fixedly installed on the outer wall of the collection hood (1). The liquid outlet of the gas-liquid separator (3) is connected to a liquid outlet pipe. The internal flue (2) is located inside and above the collection hood (1). The internal flue (2) is provided with multiple smoke inlets. One end of the internal flue (2) is closed, and the other end is connected to the air inlet of the gas-liquid separator (3). The external flue (4) is located outside the collection hood (1). One end of the external flue (4) is connected to the air outlet of the gas-liquid separator (3), and the other end of the external flue (4) is connected to the flue gas collector (5).

2. The mill flue gas collection hood according to claim 1, characterized in that: The collection cover (1) includes a support frame (11), a sealing plate (12) and a door assembly (13). The sealing plate (12) is sealed on the four sides and the top surface of the support frame (11). A door frame (121) is provided on the sealing plate (12) on at least one side of the support frame (11). The door assembly (13) is disposed in the door frame (121).

3. A rolling mill flue gas collection hood according to claim 2, characterized in that: The door assembly (13) includes a guide rail (131), an outer door (132) and an inner door (133). The guide rail (131) is disposed at the bottom and / or top of the door frame (121). The guide rail (131) is disposed along the width direction of the door frame (121). The inner door (133) and the outer door (132) are both slidably disposed in the guide rail (131).

4. A rolling mill flue gas collection hood according to claim 3, characterized in that: The guide rail (131) is located at the bottom of the door frame (121), and guide rail wheels (1322) are provided below the inner door (133) and the outer door (132).

5. A rolling mill flue gas collection hood according to claim 3, characterized in that: The outer door (132) is provided with two outer door handles (1321), and the two outer door handles (1321) are respectively located on both sides of the end face of the outer door (132) away from the inner door (133); the inner door (1333) is provided with two handle grooves (1332) on both sides, and two handle seats (1333) are provided in the handle grooves (1332) in the vertical direction. The inner door handle (1331) is rotatably installed in the handle seat (1333), and the inner door handle (1331) is rotatably installed in the handle seat (1333) in the vertical direction.

6. A rolling mill flue gas collection hood according to claim 5, characterized in that: The inner door (133) and the outer door (132) are arranged alternately. The end face of the inner door (133) facing the outer door (132) and the end face of the outer door (132) facing the inner door (133) are both provided with door seals (135), and the door seals (135) are arranged in the vertical direction.

7. A mill flue gas collection hood according to any one of claims 3-5, characterized in that: Guide rail seals (134) are also provided on the inner end faces of both sides of the guide rail (131). One side of the guide rail seal (134) is sealed to the end face of the outer door (132) away from the inner door (133), and the other side of the guide rail seal (134) is sealed to the end face of the inner door (133) away from the outer door (132).

8. A mill flue gas collection hood according to any one of claims 1-5, characterized in that: The top of the internal flue (2) is provided with a support frame (22), the top of the support frame (22) is fixed to the top collection cover (1) by bolts, and the bottom of the support frame (22) is connected to the internal flue (2) by bolts.

Images