Smoke tube structure for smelting furnace

Abstract

The utility model discloses a smoke pipe structure for a smelting furnace, which comprises a hearth smoke pipe communicated with the smelting furnace and a dust removal smoke pipe communicated with negative pressure dust removal equipment, a communicating vessel is arranged between the air outlet end of the hearth smoke pipe and the air inlet end of the dust removal smoke pipe, and the communicating vessel comprises an air pipe, a fan, a valve and a cap pipe. The air inlet end of the air pipe is communicated with the air outlet end of the hearth smoke pipe, the fan and the valve are both installed on the air pipe, the air outlet end of the air pipe is matched with the air inlet end of the cap pipe, and the air outlet end of the cap pipe is communicated with the air inlet end of the dust removal smoke pipe. The communicating vessel in the smoke pipe structure communicates the hearth smoke pipe with the dust removal smoke pipe, the air pipe and the cap pipe of the communicating vessel are not connected into a whole, and a gap is formed between the air pipe and the cap pipe, so that heat in the furnace is prevented from leaking out due to the fact that a valve is accidentally opened by negative pressure of the pipeline, and smoke in the furnace can be guaranteed to be exhausted under the action of the fan. The smoke smoothly enters the dust removal smoke pipe; a certain amount of cold air can be supplemented from the outside, the temperature of smoke is reduced, and the safety of pipelines and other equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of flue technology, and in particular to a flue structure for a smelting furnace. Background Technology

[0002] Smelting furnaces are one of the commonly used smelting equipment in the metal processing industry. They generate the heat required for metal smelting using energy forms such as electricity, fuel oil, and natural gas, and at the same time produce flue gas. In order to ensure the stability of the atmosphere inside the furnace, the flue gas needs to be discharged through the furnace flue pipe. For environmental protection requirements, the flue gas is generally discharged into the dust removal flue pipe and finally enters the negative pressure dust removal equipment for environmental protection treatment.

[0003] When exhaust gas is finished, such as when the smelting furnace is shut down or exhaust gas is stopped for heat preservation, the valves on the pipeline, usually butterfly valves, need to be closed. However, to ensure dust removal in the workshop, the dust collector is generally not closed. Under the negative pressure in the pipeline, the butterfly valve may be passively opened or partially opened, causing heat from the smelting furnace to leak out with the flue gas. Moreover, the temperature is high during exhaust gas, which can easily burn out the pipeline; and if the pipeline is short, it may damage the dust removal equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a flue structure for a smelting furnace to solve the problems of the butterfly valve on the dust removal pipe being passively opened, causing heat to leak out of the smelting furnace, and the high temperature during flue gas exhaust, which can easily burn out the pipe and damage the dust removal equipment.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A flue structure for a smelting furnace includes a furnace flue connected to the smelting furnace and a dust removal flue connected to a negative pressure dust removal device. A communicating vessel is provided between the outlet end of the furnace flue and the inlet end of the dust removal flue. The communicating vessel includes a duct, a fan, a valve, and a cap pipe. The inlet end of the duct is connected to the outlet end of the furnace flue. The fan and the valve are both installed on the duct. The outlet end of the duct is adapted to the inlet end of the cap pipe, and the outlet end of the cap pipe is connected to the inlet end of the dust removal flue.

[0007] A further technical solution is that the air outlet end of the air duct extends into the air inlet end of the cap tube.

[0008] A further technical solution is that the valve is a pneumatic butterfly valve.

[0009] A further technical solution is that an anti-backflow cone is installed inside the air outlet end of the air duct.

[0010] A further technical solution is that a one-way valve is installed at the air outlet end of the air duct.

[0011] A further technical solution is that a flow regulating valve is provided on the cap tube.

[0012] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0013] This utility model proposes a flue structure for a smelting furnace. The communicating vessel in this flue structure connects the furnace flue and the dust removal flue. The air duct and the cap duct of the communicating vessel are not connected as a whole. On the one hand, there is a gap between the two to prevent the valve from being opened by negative pressure in the pipeline and causing heat to leak out of the furnace. On the other hand, under the action of the fan, it can also ensure that the flue gas in the furnace can smoothly enter the dust removal flue when it needs to be discharged. On the other hand, a certain amount of cold air can be introduced from the outside to reduce the temperature of the flue gas and ensure the safety of the pipeline and other equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a flue pipe for a smelting furnace according to the present invention.

[0015] Figure 2 For this utility model Figure 1 A schematic diagram of the structure of a communicating vessel.

[0016] Attached reference numerals: 1. Furnace flue; 2. Dust removal flue; 3. Communicating vessel; 4. Air duct; 5. Fan; 6. Valve; 7. Cap pipe; 8. Anti-backflow cone; 9. Check valve; 10. Flow regulating valve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] Example 1:

[0024] This implementation example Figure 1 and Figure 2 As shown, a flue structure for a smelting furnace includes a furnace flue 1 connected to the smelting furnace and a dust removal flue 2 connected to a negative pressure dust removal device. A connector 3 is provided between the outlet end of the furnace flue 1 and the inlet end of the dust removal flue 2. The connector 3 includes an air duct 4, a fan 5, a valve 6, and a cap pipe 7. The inlet end of the air duct 4 is connected to the outlet end of the furnace flue 1. The fan 5 and the valve 6 are both installed on the air duct 4. The outlet end of the air duct 4 is adapted to the inlet end of the cap pipe 7. The outlet end of the cap pipe 7 is connected to the inlet end of the dust removal flue 2.

[0025] When it is necessary to remove the flue gas from the smelting furnace, valve 6 and fan 5 are opened. The high-temperature flue gas is discharged from the furnace flue pipe 1 to the air pipe 4. Under the action of fan 5, the high-temperature flue gas smoothly enters the cap pipe 7 and finally enters the negative pressure dust removal equipment through the dust removal flue pipe 2 for treatment. During the flue gas discharge stage, the air pipe 4 and cap pipe 7 are not completely sealed. During this period, a certain amount of cold air can enter the pipeline under the action of negative pressure to cool down the high-temperature flue gas and prevent the valve 6 from being accidentally opened under the negative pressure of the pipeline, thus preventing the heat in the furnace from being released.

[0026] Preferably, the air outlet of the duct 4 extends into the air inlet of the cap tube 7.

[0027] The cap tube 7 is shaped like a larger bottom and a smaller top.

[0028] This ensures that the flue gas discharged from duct 4 can better enter the cap duct 7.

[0029] Preferably, valve 6 is a pneumatic butterfly valve.

[0030] The pneumatic butterfly valve is used to control the opening and closing of the flue gas discharge in duct 4.

[0031] Preferably, an anti-backflow cone 8 is provided inside the air outlet end of the air duct 4.

[0032] When the smoke output of duct 4 exceeds the smoke intake of cap 7, backflow of flue gas may occur. Anti-backflow cone 8 can reduce backflow of flue gas into duct 4.

[0033] Preferably, a one-way valve 9 is provided at the air outlet end of the air duct 4.

[0034] To further reduce the occurrence of flue gas backflow in duct 4.

[0035] Preferably, a flow regulating valve 10 is provided on the cap tube 7.

[0036] Used to control the negative pressure air intake of cap tube 7.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue structure for a smelting furnace, comprising a furnace flue (1) connected to the smelting furnace and a dust removal flue (2) connected to a negative pressure dust removal device, characterized in that: A connector (3) is provided between the outlet end of the furnace flue (1) and the inlet end of the dust removal flue (2). The connector (3) includes a duct (4), a fan (5), a valve (6) and a cap pipe (7). The inlet end of the duct (4) is connected to the outlet end of the furnace flue (1). The fan (5) and the valve (6) are both installed on the duct (4). The outlet end of the duct (4) is adapted to the inlet end of the cap pipe (7). The outlet end of the cap pipe (7) is connected to the inlet end of the dust removal flue (2).

2. The flue structure for a smelting furnace according to claim 1, characterized in that: The air outlet of the air duct (4) extends into the air inlet of the cap tube (7).

3. The flue structure for a smelting furnace according to claim 1, characterized in that: The valve (6) is a pneumatic butterfly valve.

4. The flue structure for a smelting furnace according to claim 1, characterized in that: An anti-backflow cone (8) is provided inside the air outlet of the air duct (4).

5. The flue structure for a smelting furnace according to claim 1, characterized in that: The air outlet of the air duct (4) is equipped with a one-way valve (9).

6. The flue structure for a smelting furnace according to claim 1, characterized in that: A flow regulating valve (10) is provided on the cap tube (7).

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