Smoke trend changing device of annealing furnace

Abstract

The utility model belongs to the technical field of pipelines, and mainly relates to a flue gas trend changing device of an annealing furnace, which comprises an air inlet pipeline for flue gas from a hearth to a heat exchanger and an air outlet pipeline for flue gas from the heat exchanger to the hearth, and both the air inlet pipeline and the air outlet pipeline are provided with a plurality of corners for increasing the flow resistance of the flue gas and flame. Through the arrangement of the corner, the air inlet pipeline and the air outlet pipeline are prevented from being arranged into a linear pipeline, the flowing resistance of high-temperature flue gas and flame is increased through the corner, the flame cannot make direct contact with the heat exchanger, and therefore the heat exchanger is protected and can be prevented from being directly damaged by the flame, and meanwhile the temperature of the high-temperature flue gas can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipelines, and mainly relates to a device for changing the flue gas flow direction of an annealing furnace. Background Art

[0002] At present, the connection mode between the heat exchanger of the bench annealing furnace for cast iron pipes and the furnace chamber is a direct connection. During the use process, the high-temperature flue gas and flame in the furnace chamber are directly sucked into the heat exchanger under negative pressure. Therefore, the heat exchange pipes close to the flue of the furnace chamber have a high temperature and are easily burned out, losing the heat exchange effect; after the heat exchange pipes are burned out, the combustion-supporting air will overflow to the inside of the furnace chamber at the burned part, resulting in a high furnace pressure, which is not conducive to the annealing of cast iron pipe products. At the same time, it will also damage the rotating mechanism of the bench annealing furnace trolley at high temperature. Content of the Utility Model

[0003] The utility model provides a device for changing the flue gas flow direction of an annealing furnace to solve the problem that high-temperature flue gas is sucked into the heat exchanger and burns out the heat exchange pipes in the prior art.

[0004] To solve the above problems, the utility model adopts the following technical scheme:

[0005] A device for changing the flue gas flow direction of an annealing furnace includes an air inlet pipe for flue gas to flow from the furnace chamber to the heat exchanger and an air outlet pipe for flue gas to flow from the heat exchanger to the furnace chamber. Both the air inlet pipe and the air outlet pipe have a plurality of corners for increasing the flow resistance of the flue gas and flame.

[0006] It has the following beneficial effects: By setting the corners, the air inlet pipe and the air outlet pipe are prevented from being arranged in a straight-line pipe. The corners increase the flow resistance of the high-temperature flue gas and flame, so that the flame will not directly contact the heat exchanger, thereby protecting the heat exchanger from being directly damaged by the flame. At the same time, it can also reduce the temperature of the high-temperature flue gas.

[0007] Furthermore, cold air inlets are provided on both the air inlet pipe and the air outlet pipe.

[0008] It has the following beneficial effects: By opening the cold air inlet on the air inlet pipe, the temperature of the high-temperature flue gas entering the heat exchanger can be reduced, further preventing the high-temperature flue gas from damaging the heat exchanger; by opening the cold air inlet on the air outlet pipe, the temperature inside the air outlet pipe can be further reduced.

[0009] Furthermore, valves for controlling the opening and closing are provided at the cold air inlets.

[0010] It has the following beneficial effects: By setting the valves, it is convenient to control the opening and closing of the cold air inlets.

[0011] Further, the valve includes a valve plate, a mounting plate fixedly assembled outside the cold air outlet, and an angle plate fixedly assembled on the mounting plate. A sliding groove for the valve plate to slide is formed between the angle plate and the mounting plate, and the valve plate is slidably assembled in the sliding groove to control the opening and closing of the cold air outlet and the opening size.

[0012] Further, a handle is provided on the valve plate.

[0013] It has the following beneficial effects: By pulling the handle, the valve plate can be opened more easily.

[0014] Further, the air inlet pipe and the air outlet pipe are pipes made of carbon steel.

[0015] Further, the turning angle is 90°.

[0016] It has the following beneficial effects: The 90° turning angle increases the resistance to the flow of high-temperature flue gas and flame, protects the heat exchanger from direct flame damage, and can also reduce the temperature of the high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the present utility model will become readily understood. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Description of the reference numerals in the drawings:

[0021] 1. Air inlet pipe; 2. Air outlet pipe; 3. Turning angle; 4. Heat exchanger; 5. Cold air outlet; 6. Valve; 7. Mounting plate; 8. Angle plate; 9. Valve plate; 10. Handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Those skilled in the art should understand that the following described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present utility model.

[0023] The following specifically introduces various non - restrictive implementation manners of the present utility model. The number of any element in the drawings is for illustration rather than limitation, and any naming is only for distinction without any restrictive meaning. It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0024] Embodiment 1

[0025] As Figure 1 shown, a device for changing the flow direction of annealing furnace flue gas includes an air inlet pipe 1 and an air outlet pipe 2. The flue gas moves from the furnace chamber to the heat exchanger 4 through the air inlet pipe 1, and the flue gas moves from the heat exchanger 4 to the furnace chamber through the air outlet pipe 2. Both the air inlet pipe 1 and the air outlet pipe 2 have a plurality of corners 3 for increasing the flow resistance of the flue gas and the flame. By setting the corners 3, the air inlet pipe 1 and the air outlet pipe 2 are prevented from being arranged in a straight - line pipe. The plurality of corners 3 increases the flow resistance of the high - temperature flue gas and the flame, so that the flame does not directly contact the heat exchanger 4. The flame is restricted by the corners 3, thereby protecting the heat exchanger 4 from being directly damaged by the flame. At the same time, it can also reduce the temperature of the high - temperature flue gas, enabling the heat exchanger 4 to be used for a longer time.

[0026] The corner 3 in this embodiment is 90°. The 90° corner 3 increases the flow resistance of the high - temperature flue gas and the flame, protects the heat exchanger 4 from being directly damaged by the flame, and can also reduce the temperature of the high - temperature flue gas.

[0027] Cold air inlets 5 are provided on both the air inlet pipe 1 and the air outlet pipe 2. By opening the cold air inlet 5 on the air inlet pipe 1, the temperature of the high - temperature flue gas entering the heat exchanger 4 can be reduced, further preventing the high - temperature flue gas from damaging the heat exchanger 4. By opening the cold air inlet 5 on the air outlet pipe 2, the temperature in the air outlet pipe 2 can be further reduced. At the same time, because there are more corners 3 and the gas flow resistance in the pipe is large, the cold air inlets 5 can also play a role in supplementing air.

[0028] A valve 6 for controlling the opening and closing is provided at the cold air inlet 5. By setting the valve 6, it is convenient to control the opening and closing of the cold air inlet 5.

[0029] Specifically, as Figure 2 shown, the valve 6 includes a valve plate 9, a mounting plate 7 fixedly assembled outside the cold air inlet 5, and an angle plate 8 fixedly assembled on the mounting plate 7. A sliding groove for the valve plate 9 to slide is formed between the angle plate 8 and the mounting plate 7. The valve plate 9 is slidably assembled in the sliding groove to control the opening and closing of the cold air inlet 5 and the opening size.

[0030] A handle 10 is provided on the valve plate 9. By pulling the handle 10, the valve plate 9 can be more easily opened. The air inlet pipe 1 and the air outlet pipe 2 in this embodiment are pipes made of carbon steel.

[0031] In this embodiment, the air inlet duct 1 and the air outlet duct 2 can also be connected to a fan to enable the gas flow in the air inlet duct 1 and the air outlet duct 2.

[0032] Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that the valve 6 in this embodiment includes a mounting plate 7 fixedly assembled outside the cold air outlet 5 and a valve plate 9 rotatably assembled on the mounting plate 7, and the opening and closing of the cold air outlet 5 and the opening size are controlled by the rotation of the valve plate 9.

Claims

1. A device for changing the flue gas flow direction of an annealing furnace, characterized in that, It includes an air inlet pipe for flue gas to flow from the furnace to the heat exchanger and an air outlet pipe for flue gas to flow from the heat exchanger to the furnace. Both the air inlet pipe and the air outlet pipe have a plurality of turning angles for increasing the flow resistance of the flue gas and the flame.

2. The annealing furnace flue gas flow direction changing device according to claim 1, characterized in that, Cold air inlets are provided on both the air inlet pipe and the air outlet pipe.

3. The annealing furnace flue gas flow direction changing device according to claim 2, characterized in that, A valve for controlling the opening and closing is provided at the cold air inlet.

4. The annealing furnace flue gas flow direction changing device according to claim 3, characterized in that, The valve includes a valve plate, a mounting plate fixedly assembled outside the cold air inlet, and an angle plate fixedly assembled on the mounting plate. A sliding groove for the valve plate to slide is formed between the angle plate and the mounting plate, and the valve plate is slidably assembled in the sliding groove to control the opening and closing of the cold air inlet.

5. The annealing furnace flue gas flow direction changing device according to claim 4, characterized in that, A handle is provided on the valve plate.

6. A device for changing the flue gas flow direction of an annealing furnace according to any one of claims 1-5, characterized in that, The air inlet pipe and the air outlet pipe are pipes made of carbon steel.

7. A device for changing the flue gas flow direction of an annealing furnace according to any one of claims 1-5, characterized in that, The turning angle is 90°.

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