Smoke exhaust frame of carbon roasting furnace for aluminum

Abstract

The utility model discloses a smoke exhaust frame of an aluminum carbon roasting furnace, which belongs to the technical field of roasting furnace flame path gas exhaust devices and comprises a smoke exhaust frame smoke pipe, the bottom of the smoke exhaust frame smoke pipe is connected with a smoke exhaust frame support, the side wall of the smoke exhaust frame smoke pipe is communicated with a plurality of flame path branch pipes, and the flame path branch pipes are all communicated with metal corrugated hoses. One end of the metal corrugated hose deviating from the flame path header pipe is connected with a branch pipe base. According to the utility model, the flame path branch pipe is arranged on the side wall of the smoke pipe of the smoke exhaust frame in a 45-degree inclined manner, and the metal corrugated hose is connected with the flame path branch pipe and is further matched with the branch pipe base; the problems that in the prior art, alignment adjustment of a flue branch pipe and a flue opening of a smoke exhaust frame of a roasting furnace is difficult, the flue branch pipe is blocked, a valve plate is blocked, header pipe materials fall into the branch pipe, and personnel operation is inconvenient are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of roasting furnace flue gas exhaust devices, in particular to a smoke exhaust rack of a carbon roasting furnace for aluminum. Background Art

[0002] The smoke exhaust rack is one of the key equipment in the anode baking furnace combustion system. Its function is to collect the flue gas in the baking furnace fire channel into the smoke exhaust rack and discharge it to the purification system through the annular flue. Due to the distance between the baking furnace surface and the overhead crane, the height of the smoke exhaust rack currently used in anode baking furnaces is about 2 meters. Its lower branch pipe (metal corrugated hose) is short and has limited expansion and contraction, making it difficult to align the branch pipe opening with the fire channel opening. Secondly, the branch pipe and branch pipe valve plate of this type of smoke exhaust rack are easily blocked and blocked by ash, tar and other debris, making it difficult to adjust the negative pressure of the fire channel and inconvenient to clean, ultimately affecting the stable operation of the baking furnace combustion system and product quality.

[0003] In the prior art, the publication number is CN207622552U, and the patent name is a Chinese utility model patent for a smoke exhaust rack for an anode baking furnace. It includes a smoke pipe and an elbow connected together by flanges. The smoke pipe is a tapered conical cylinder and is evenly distributed with several fire channel branches. The smoke pipe is respectively equipped with a ladder and a lifting bracket with a lifting chain. The top of the ladder is connected to the middle of the lifting bracket platform. The front end of the elbow is equipped with a butterfly valve docking point. The number of fire channel branches ranges from 9 to 15. The ladder is located at 1 / 3 of the smoke pipe near the elbow. The smoke exhaust rack smoke pipe is a tapered conical cylinder smoke pipe, which can effectively avoid the problems of heavy counterweight and high counterweight precision of the smoke exhaust rack smoke pipe. It also avoids the problem of smoke exhaust rack smoke pipe bending and deformation during long-term use, and is also conducive to the precise control of flue gas flow and fire channel negative pressure. The above patent changes the smoke pipe of the smoke exhaust rack into a tapered conical cylindrical smoke pipe, which improves the negative pressure distribution of each fire channel branch pipe and helps to reduce the lateral temperature difference of each fire channel of the roasting furnace.

[0004] However, the above-mentioned smoke exhaust rack has the following problems: First, in actual production, the height of the smoke exhaust rack is limited, and the fire channel branch pipe below the smoke pipe is short and has limited expansion and contraction. When the furnace wall deforms, it is difficult to align the branch pipe opening with the fire channel opening, which seriously affects the negative pressure of the fire channel. Second, the fire channel branch pipe is connected to the smoke pipe at a 45-degree angle, and the branch pipe valve can only use an electric flap valve (using a butterfly valve has a large smoke resistance). The shaft sleeve of the flap valve is prone to ash, tar and other foreign matter, which blocks the normal rotation of the valve plate, and these debris cannot be discharged. The valve plate can only be manually removed and cleaned, which is difficult and labor-intensive. Third, the inner wall of the branch pipe shell is easily adhered to ash and tar. There is always friction between the valve plate of the flap valve and the branch pipe shell, which affects the adjustment of the valve plate and may even cause the valve plate to become stuck in severe cases. Fourth, the flue gas enters the smoke exhaust rack main pipe through the branch pipe. The main pipe has a large diameter, and the ash, tar and other debris in the flue gas will settle in the main pipe and fall into the branch pipe, affecting the movement of the valve plate. When cleaning the main pipe of the smoke exhaust rack, ash and tar are easily transferred into the branch pipe, which increases the difficulty and workload of cleaning; fifth, operators need to drill under the smoke pipe to perform operations such as branch pipe alignment and branch pipe sealing. The operating space for personnel is small and the working time is long, which is not ergonomic. Utility Model Content

[0005] The utility model aims to provide a smoke exhaust rack for a carbon roasting furnace for aluminum, which solves the technical problem of difficulty in aligning and adjusting the fire channel branch pipe and the fire channel opening of the smoke exhaust rack of the roasting furnace in the prior art.

[0006] The technical solution adopted by the utility model is that the smoke exhaust rack of the aluminum carbon roasting furnace includes a smoke exhaust rack smoke pipe, the bottom of the smoke exhaust rack smoke pipe is connected to the smoke exhaust rack bracket, the side wall of the smoke exhaust rack smoke pipe is connected to a plurality of fire channel branch pipes, the fire channel branch pipes are all connected to a metal corrugated hose, and the end of the metal corrugated hose away from the fire channel main pipe is connected to the branch pipe base.

[0007] The utility model is also characterized in that:

[0008] A circular butterfly valve is provided at the connection point between the metal corrugated hose and the fire channel branch pipe.

[0009] The fire channel branch pipe is installed on the side wall of the smoke exhaust rack where the smoke pipe is located in the horizontal plane.

[0010] The cross section of the metal corrugated hose is circular.

[0011] The fire channel branch pipe extends out of the smoke exhaust rack smoke pipe and is inclined at 45 degrees to the smoke exhaust rack smoke pipe.

[0012] The beneficial effects of the utility model are:

[0013] The utility model arranges the fire channel branch pipe at a 45° inclination on the side wall of the smoke exhaust rack smoke duct, and adopts a metal corrugated hose to connect the fire channel branch pipe, which is further coordinated with the branch pipe base, thereby solving the problems in the prior art such as the difficulty in adjusting the alignment of the fire channel branch pipe of the roasting furnace smoke exhaust rack and the fire channel opening, the blockage of the fire channel branch pipe, the obstruction of the valve plate, the falling of main pipe material into the branch pipe, and the inconvenience of personnel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the smoke exhaust rack of the utility model carbon roasting furnace for aluminum;

[0015] In the figure, 1. Smoke exhaust rack smoke pipe, 2. Smoke exhaust rack bracket, 3. Round butterfly valve, 4. Branch pipe base, 5. Metal corrugated hose. DETAILED DESCRIPTION

[0016] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] like Figure 1 As shown, the smoke exhaust rack of the carbon roasting furnace for aluminum disclosed in the utility model includes a smoke exhaust rack smoke pipe 1, the bottom of the smoke exhaust rack smoke pipe 1 is connected to the smoke exhaust rack bracket 2, the side wall of the smoke exhaust rack smoke pipe 1 is connected to multiple fire channel branches, the fire channel branches are all connected to a metal corrugated hose 5, and the end of the metal corrugated hose 5 away from the fire channel main pipe is connected to the branch pipe base 4.

[0019] In this embodiment, the metal corrugated hose 5 is arranged on the side of the smoke exhaust rack smoke pipe 1. The metal corrugated hose 5 is located below the side of the smoke exhaust rack smoke pipe 1, which widens the operating space for personnel. Personnel do not need to drill under the smoke pipe to operate, which is ergonomic and reduces personnel fatigue. By providing a smoke exhaust rack bracket 2, the center of gravity of the smoke exhaust rack smoke pipe 1 is stabilized. In actual application, the smoke exhaust rack bracket 2 extends to the side of the metal corrugated hose 5 to ensure that the smoke exhaust rack smoke pipe 1 is placed stably. The fire channel branch pipe is welded to the smoke exhaust rack smoke pipe 1, and the fire channel branch pipe is connected to the metal corrugated hose 5 by a flange, which is convenient for disassembly and replacement.

[0020] In actual use, the metal corrugated hose 5 is about 1.5 m long, with a flange at the top and a base 4 at the bottom. Four adjustable chains are arranged between the flange and the base 4 to prevent the fire channel branch pipe from sagging excessively during the hoisting of the smoke exhaust rack and to adjust the alignment of the metal corrugated hose 5 and the fire channel opening. The inner diameter of the base 4 is slightly larger than the fire channel hole. When aligning, the base 4 is placed on the outer edge of the fire channel hole to facilitate the alignment of the fire channel hole and simplify the alignment operation. Compared with the plug-in base, the operation is easier and more convenient.

[0021] Example 2

[0022] The smoke exhaust rack of the aluminum carbon roasting furnace disclosed in this embodiment includes a smoke exhaust rack smoke pipe 1. The bottom of the smoke exhaust rack smoke pipe 1 is connected to a smoke exhaust rack bracket 2. The side wall of the smoke exhaust rack smoke pipe 1 is connected to multiple fire channel branches. The fire channel branches are all connected to a metal corrugated hose 5. The end of the metal corrugated hose 5 facing away from the fire channel main pipe is connected to a branch pipe base 4. A circular butterfly valve 3 is provided at the connection between the metal corrugated hose 5 and the fire channel branch pipe. The cross section of the metal corrugated hose 5 is circular. The metal corrugated hose 5 adopts a round pipe instead of a square pipe, which reduces the difficulty of construction. The valve at the end of the metal corrugated hose 5 adopts a butterfly valve, which is not easy to get stuck. There is no dead corner for material accumulation. In addition, the circular butterfly valve is less likely to get stuck than the square butterfly valve (there is always friction between the two sides of the square butterfly valve and the pipe wall). The fire channel branch is installed on the side wall of the smoke exhaust rack smoke pipe 1 in the horizontal plane. The fire channel branch pipe is in the horizontal section of the smoke exhaust rack smoke pipe 1, and its height is almost the same as that of a person. The person can stand to adjust the circular butterfly valve 3, repair the actuator, etc., without having to squat under the smoke exhaust rack smoke pipe 1 for a long time, thereby reducing work fatigue.

[0023] Example 3

[0024] The smoke exhaust rack of the carbon roasting furnace for aluminum disclosed in this embodiment includes a smoke exhaust rack smoke pipe 1, the bottom of the smoke exhaust rack smoke pipe 1 is connected to a smoke exhaust rack bracket 2, the side wall of the smoke exhaust rack smoke pipe 1 is connected to multiple fire channel branches, and the fire channel branches are all connected to a metal corrugated hose 5, and the end of the metal corrugated hose 5 facing away from the fire channel main pipe is connected to the branch pipe base 4. A circular butterfly valve 3 is provided at the connection between the metal corrugated hose 5 and the fire channel branch pipe. The fire channel branch pipe is installed on the side wall of the smoke exhaust rack smoke pipe 1 on the horizontal plane. The cross-section of the metal corrugated hose 5 is circular, and the fire channel branch pipe extends out of the smoke exhaust rack smoke pipe 1 and is inclined at 45° to the smoke exhaust rack smoke pipe 1.

[0025] In this embodiment, the fire channel branch pipe enters from the side of the smoke exhaust rack duct 1 at a 45° angle. This increases the length of the metal bellows hose 5, allowing for greater flexibility and facilitating adjustments during alignment with the smoke exhaust rack duct 1. This ensures smooth flue gas flow while preventing debris from settling in the smoke exhaust rack duct 1 and falling into the fire channel branch pipe. If the fire channel branch pipe remains positioned and continues to enter from the bottom of the smoke exhaust rack duct 1, the overall height of the smoke exhaust rack duct 1 can be adjusted to allow for greater flexibility of the metal bellows hose 5. However, the distance between the furnace surface and the overhead crane is fixed in almost all roasting furnaces, leaving no room for adjustment. Tar, ash, and other debris drawn in through the fire channel branch pipe will settle at the bottom of the smoke exhaust rack duct 1 due to the varying pipe diameters, rather than falling into the fire channel branch pipe. This also prevents materials from falling into the fire channel branch pipe when personnel clean the smoke exhaust rack duct 1, resolving the existing problem of ash and tar easily falling into the branch pipe, causing blockage and valve plate obstruction.

Claims

1. The smoke exhaust rack of the aluminum carbon roasting furnace is characterized by: The smoke exhaust rack smoke pipe (1) comprises a smoke exhaust rack support (2) connected to the bottom of the smoke exhaust rack smoke pipe (1), a plurality of fire channel branches are connected to the side wall of the smoke exhaust rack smoke pipe (1), the fire channel branches are all connected to a metal corrugated hose (5), and the end of the metal corrugated hose (5) facing away from the fire channel main pipe is connected to a branch pipe base (4).

2. The smoke exhaust rack of the aluminum carbon roasting furnace according to claim 1, characterized in that: A circular butterfly valve (3) is provided at the connection point between the metal corrugated hose (5) and the fire channel branch pipe.

3. The smoke exhaust rack of the carbon roasting furnace for aluminum according to claim 2, characterized in that: The fire channel branch pipe is installed on the side wall of the smoke exhaust rack smoke pipe (1) located on the horizontal plane.

4. The smoke exhaust rack of the carbon roasting furnace for aluminum according to claim 1, characterized in that: The cross section of the metal corrugated hose (5) is circular.

5. The smoke exhaust rack of the carbon roasting furnace for aluminum according to claim 1, characterized in that: The fire channel branch pipe extends out of the smoke exhaust rack smoke pipe (1) and is arranged to be inclined at 45 degrees to the smoke exhaust rack smoke pipe (1).

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