Self-cleaning flue annealing furnace

Abstract

This utility model discloses a self-cleaning flue annealing furnace, relating to the field of annealing furnace technology. It includes: an annealing furnace body with a flue outlet at its upper end and a flue pipe on the flue outlet; and a cleaning mechanism located above the furnace body for cleaning the flue pipe's interior dust, comprising an inert gas compressor. The bottom of the inert gas compressor is fixedly connected to the upper end of the furnace body via a support frame. The inlet of the inert gas compressor is fixedly connected to a connecting pipe, the other end of which is connected to an inert gas storage tank. The exhaust port of the inert gas compressor is fixedly connected to an inlet pipe. This utility model, through its cleaning mechanism, can clean loose impurities (such as dust) adhering to the inner wall of the flue pipe, preventing dust accumulation and making subsequent deep cleaning of the flue pipe more difficult. It also significantly extends the time required for deep cleaning of the flue pipe.

Description

Technical Field

[0001] This utility model relates to the field of annealing furnace technology, specifically a self-cleaning flue annealing furnace. Background Technology

[0002] The core function of a flue gas annealing furnace is to eliminate the internal stress generated in metal workpieces (such as steel, pipes, and plates) during rolling, forging, and welding processes through controlled high-temperature heating and slow cooling. At the same time, it improves their microstructure, ultimately achieving the goals of reducing workpiece brittleness, improving plasticity and toughness, and stabilizing dimensional accuracy, thus laying a key performance foundation for subsequent processing (such as cutting and stamping) or direct use.

[0003] When a flue annealing furnace is in operation, fumes are discharged through the exhaust duct. While most of the fumes leave the duct during this process, a small portion adheres to the inner wall of the duct. With prolonged use, this fumes gradually accumulate and undergo physical and chemical changes, eventually forming a mixed deposit (commonly known as "flue scale"). Its composition and form vary depending on the type of fumes, temperature, humidity, and other factors. This deposit not only clogs the duct but also causes equipment malfunctions, safety risks, and environmental problems. Therefore, a self-cleaning flue annealing furnace has been proposed. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning flue annealing furnace to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-cleaning flue annealing furnace, comprising: The annealing furnace body has a flue gas outlet at its upper end and a flue gas pipe on the flue gas outlet. A cleaning mechanism, located above the annealing furnace body, is used to clean the smoke and dust inside the exhaust duct. It includes an inert gas compressor. The bottom of the inert gas compressor is fixedly connected to the upper end of the annealing furnace body via a support frame. The air inlet of the inert gas compressor is fixedly connected to a connecting pipe. The other end of the connecting pipe is connected to an inert gas storage tank. The exhaust port of the inert gas compressor is fixedly connected to an air inlet pipe. The other end of the air inlet pipe is connected to the exhaust duct. The channel control component, located at the junction of the annealing furnace body, the flue gas duct, and the cleaning mechanism, is used to control the opening and closing of the duct to prevent the backflow of smoke or inert gas.

[0006] As a further preferred embodiment of this technical solution, the channel control component includes a first electric valve and a second electric valve. The first electric valve is located between the exhaust port and the exhaust pipe. A branch pipe is provided on the side wall of the exhaust pipe near the exhaust port. The second electric valve is located between the branch pipe and the air inlet pipe.

[0007] As a further preferred embodiment of this technical solution, the bottom of both the first electric valve and the second electric valve is fixedly connected to a support plate, and the bottom of the support plate is fixedly connected to an arc-shaped plate, which is welded to the outer wall of the annealing furnace body.

[0008] As a further preferred embodiment of this technical solution, the upper end of the inert gas storage tank is provided with an injection port, which is sealed by a threaded sealing cap, and the threaded sealing cap is threadedly engaged with the inner wall of the injection port.

[0009] As a further preferred embodiment of this technical solution, a fixing sleeve is fixedly fitted on the outer wall of the exhaust pipe, and a fixing plate integrally formed thereon is provided on the side wall of the fixing sleeve, with fixing holes respectively opened on both sides of the side wall of the fixing plate.

[0010] As a further preferred embodiment of this technical solution, the bottom of the annealing furnace body is supported by four support legs.

[0011] This utility model provides a self-cleaning flue annealing furnace, which has the following beneficial effects: This invention, through its cleaning mechanism, can remove loose impurities (such as soot) adhering to the inner wall of the exhaust duct, preventing the continuous accumulation of soot and making subsequent deep cleaning of the exhaust duct more troublesome. At the same time, it can also significantly extend the time for deep cleaning of the exhaust duct. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the channel control component in this utility model; Figure 4 This is a schematic diagram of the structure of the fixed sleeve in this utility model; In the diagram: 100, Annealing furnace body; 101, Support leg; 102, Exhaust port; 103, Exhaust pipe; 200, Cleaning mechanism; 201, Inert gas compressor; 202, Connecting pipe; 203, Inlet pipe; 204, Support frame; 300, Channel control assembly; 301, First electric valve; 302, Second electric valve; 303, Branch pipe; 304, Support plate; 305, Arc plate; 400, Fixing sleeve; 401, Fixing plate; 402, Fixing hole; 500, Inert gas storage tank; 501, Threaded sealing cap. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] This utility model provides a technical solution: such as Figures 1 to 4 As shown, in this embodiment, a self-cleaning flue annealing furnace includes an annealing furnace body 100. The bottom of the annealing furnace body 100 is supported by four support legs 101. An exhaust port 102 is provided at the upper end of the annealing furnace body 100, and an exhaust pipe 103 is provided on the exhaust port 102. The cleaning mechanism 200, located above the annealing furnace body 100, is used to clean the smoke and dust inside the exhaust pipe 103. It includes an inert gas compressor 201. The bottom of the inert gas compressor 201 is fixedly connected to the upper end of the annealing furnace body 100 via a support frame 204. The air inlet of the inert gas compressor 201 is fixedly connected to a connecting pipe 202. The other end of the connecting pipe 202 is connected to an inert gas storage tank 500. The exhaust port of the inert gas compressor 201 is fixedly connected to an air inlet pipe 203. The other end of the air inlet pipe 203 is connected to the exhaust pipe 103. The channel control component 300 is located at the junction of the annealing furnace body 100, the flue gas duct 103 and the cleaning mechanism 200. It is used to control the opening and closing of the duct to prevent the backflow of smoke or inert gas.

[0015] The channel control component 300 includes a first electric valve 301 and a second electric valve 302. The first electric valve 301 is located between the exhaust port 102 and the exhaust pipe 103 (the end of the electric valve is fixedly connected to the pipe through the cooperation of flange and bolts, which will not be described in detail here). A branch pipe 303 is provided on the side wall of the exhaust pipe 103 near the exhaust port 102. The second electric valve 302 is located between the branch pipe 303 and the air inlet pipe 203.

[0016] Among them, the bottom of the first electric valve 301 and the second electric valve 302 are both fixedly connected to the support plate 304, and the bottom of the support plate 304 is fixedly connected to the arc plate 305, which is welded to the outer wall of the annealing furnace body 100.

[0017] The two support plates 304 can support the first electric valve 301 and the second electric valve 302, ensuring the stability of the first electric valve 301 and the second electric valve 302.

[0018] The inert gas storage tank 500 has an inlet port at its upper end, which is sealed by a threaded sealing cap 501, which is threadedly engaged with the inner wall of the inlet port.

[0019] The outer wall of the exhaust pipe 103 is fixedly fitted with a fixing sleeve 400, and a fixing plate 401 integrally formed therewith is provided on the side wall of the fixing sleeve 400. Fixing holes 402 are respectively opened on both sides of the side wall of the fixing plate 401.

[0020] By using external bolts and fixing holes 402, the fixing plate 401 can be fixed to the wall, thereby improving the stability of the smoke exhaust pipe 103. The number of fixing sleeves 400 is not as shown in the attached diagram, and needs to be set according to the actual site conditions.

[0021] Among them, the inert gas compressor 201 is model MINI-VERTICUS, and the first electric valve 301 and the second electric valve 302 can be gas electric valves from the ZAZN series of Xinou Automation, which have good high temperature resistance.

[0022] This utility model provides a self-cleaning flue annealing furnace, the specific working principle of which is as follows: After the annealing furnace finishes operation, shut it down and wait for the pipe temperature to drop below 150℃ (to prevent condensation from forming on hot gas or scalding operators). Close the first electric valve 301 to prevent dust from flowing back into the annealing furnace during cleaning. Open the second electric valve 302 to ensure that the inert gas compressor 201 and the exhaust pipe 103 are connected (when the annealing furnace body 100 is working, the second electric valve 302 is closed to prevent dust from entering the inert gas compressor 201 and also to prevent inert gas from entering the exhaust pipe 103). Then start the inert gas compressor 201, which will compress and transport the inert gas in the inert gas storage tank 500. The gas is fed into the exhaust duct 103, and the impact force of the high-pressure gas blows loosely attached impurities (such as soot) to the end of the duct. A collection bag needs to be installed at the end of the exhaust duct 103 to prevent the exhaust soot from flying around, thus completing the cleaning of the annealing furnace flue. The cleaning frequency can be once every 1-3 days. It should be noted that this cleaning mechanism is only used to clean loosely attached impurities (such as soot) on the inner wall of the duct to prevent soot from accumulating and making the duct more difficult to clean later. After long-term use, the annealing furnace duct still needs to be disassembled for deep cleaning, and this device can significantly extend the time of this deep cleaning and make subsequent deep cleaning easier.

[0023] The inert gas compressor 201, the first electric valve 301, and the second electric valve 302 can all be started by a PLC control system. This is common knowledge in the field. The appropriate PLC control system model can be selected according to the requirements, and will not be described in detail here.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning flue annealing furnace, characterized in that: include: Annealing furnace body (100), the upper end of the annealing furnace body (100) is provided with a flue gas outlet (102), and a flue gas pipe (103) is provided on the flue gas outlet (102). A cleaning mechanism (200), located above the annealing furnace body (100), is used to clean the smoke and dust inside the exhaust pipe (103). It includes an inert gas compressor (201), the bottom of which is fixedly connected to the upper end of the annealing furnace body (100) via a support frame (204). The inlet of the inert gas compressor (201) is fixedly connected to a connecting pipe (202), the other end of which is connected to an inert gas storage tank (500). The outlet of the inert gas compressor (201) is fixedly connected to an inlet pipe (203), the other end of which is connected to the exhaust pipe (103). The channel control component (300), located at the junction of the annealing furnace body (100), the flue gas duct (103), and the cleaning mechanism (200), is used to control the opening and closing of the duct to prevent the backflow of smoke or inert gas.

2. The self-cleaning flue annealing furnace according to claim 1, characterized in that: The channel control component (300) includes a first electric valve (301) and a second electric valve (302). The first electric valve (301) is located between the exhaust port (102) and the exhaust pipe (103). A branch pipe (303) is provided on the side wall of the exhaust pipe (103) near the exhaust port (102). The second electric valve (302) is located between the branch pipe (303) and the air inlet pipe (203).

3. The self-cleaning flue annealing furnace according to claim 2, characterized in that: The bottom of the first electric valve (301) and the second electric valve (302) are both fixedly connected to a support plate (304), and the bottom of the support plate (304) is fixedly connected to an arc plate (305), which is welded to the outer wall of the annealing furnace body (100).

4. The self-cleaning flue annealing furnace according to claim 1, characterized in that: The inert gas storage tank (500) has an air injection port at its upper end. The air injection port is sealed by a threaded sealing cap (501), which is threadedly engaged with the inner wall of the air injection port.

5. The self-cleaning flue annealing furnace according to claim 1, characterized in that: A fixing sleeve (400) is fixedly fitted on the outer wall of the exhaust pipe (103). A fixing plate (401) integrally formed therewith is provided on the side wall of the fixing sleeve (400). Fixing holes (402) are respectively opened on both sides of the side wall of the fixing plate (401).

6. The self-cleaning flue annealing furnace according to claim 1, characterized in that: The bottom of the annealing furnace body (100) is supported by four support feet (101).

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