Energy-saving smoke discharging device for roasting furnace

Abstract

The utility model provides a kind of roasting furnace energy-saving smoke exhaust device, it is related to roasting furnace technical field, including flue gas pipeline main body, flue gas pipeline split body and support structure, the flue gas pipeline main body left and right sides are equipped with support structure, the flue gas pipeline split body is equipped in flue gas pipeline main body below, the flue gas pipeline main body is fixedly connected with flue gas pipeline split body and inside intercommunication, the utility model replaces traditional slope flue structure using direct connection type metal smoke exhaust device, constructs the efficient path of roasting furnace fire well mouth direct annular total flue. Especially designed reducing pipe perfect cover furnace mouth, effectively eliminates the local resistance at interface, cancels the slope flue and intercommunication cover, reduces flue gas flow resistance, the utility model is installed using hoisting mode, and recycling is carried out around the use of roasting furnace, by improving the pass rate of flue gas, effectively utilize flue gas waste heat to preheat graphite, save energy, achieve energy-saving production.

Description

Technical Field

[0001] This utility model relates to the field of roasting furnace technology, specifically to an energy-saving smoke exhaust device for roasting furnaces. Background Technology

[0002] In the graphite production process, the exhaust system of the covered ring graphite electrode calcining furnace is an essential part of the processing.

[0003] In traditional technical architectures, high-temperature flue gas undergoes a complex flow path: after being ejected from the furnace cover fire shaft, it flows through checkerboard channels in multiple furnace chambers, then collects through the flue under the waist wall, and finally enters the annular main flue via a sloping flue and flue connector. This design has three key drawbacks: First, fluid resistance is significant; the sharp turn formed by the sloping flue and the connecting hood results in severe eddy current resistance, greatly increasing fan energy consumption. Second, the negative pressure system has poor stability; structural gaps in the brick-built sloping flue and the incompletely sealed furnace cover cause a negative pressure loss of over 25%, directly reducing thermal efficiency. Finally, thermal energy utilization is insufficient; the configuration of only 7-8 operating furnace chambers results in insufficient flue gas residence time, leading to the direct emission of high-temperature flue gas above 400℃ without full utilization, causing huge energy waste. These technical defects result in system fuel consumption as high as 180m³. 3 The production cost is 1100 yuan / ton, which is too high and lacks competitiveness.

[0004] Therefore, there is an urgent need to develop an energy-saving smoke exhaust device for roasting furnaces to solve the above problems. Utility Model Content

[0005] This utility model is an energy-saving smoke exhaust device for a roasting furnace. By integrating the gas supply pump body and various control valves, and installing the gas supply pump body components inside the valve plate unit, a high degree of integration of the gas supply pump body and various control valves is achieved. By designing the gas pipeline to use an internal gas circulation mode, the gas utilization rate is improved, energy consumption is reduced, and the above-mentioned technical problems are effectively solved.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an energy-saving flue gas exhaust device for a roasting furnace, comprising a flue gas duct body, a flue gas duct sub-section, and a support structure. The flue gas duct body is provided with support structures on both the left and right sides. The flue gas duct sub-section is located below the flue gas duct body. The flue gas duct body and the flue gas duct sub-section are fixedly connected and internally interconnected. The flue gas duct sub-section is provided with a pressure sensing element.

[0007] Preferably, the flue gas duct body includes: a main duct, a duct plug and a bend, a hanger is provided in the middle of the main duct, a duct plug is provided on one side of the main duct, the duct plug is bolted and fixed to the main duct, the duct plug is equipped with a handle, a bend is fixedly connected to the other side of the main duct, and an auxiliary sealing structure is provided below the bend.

[0008] Preferably, the flue gas duct includes a branch pipe, a gate valve, a bellows pipe, and a reducer pipe. A gate valve is fixedly connected to the bottom of the branch pipe, a bellows pipe is fixedly connected to the bottom of the gate valve, and a reducer pipe is fixedly connected to the bottom of the bellows pipe. A pressure sensing element is provided on one side of the reducer pipe.

[0009] Preferably, a first support hook is fixedly connected to both sides of the slide valve, and a second support hook is fixedly connected to both sides of the reducing pipe. The positions of the first support hook and the second support hook are corresponding, and an adjustable suspension device is slidably connected between the first support hook and the second support hook.

[0010] Preferably, the diameter of the upper opening of the reducing pipe corresponds to the diameter of the corrugated pipe, the lower opening of the reducing pipe is rectangular, and the lower opening of the reducing pipe covers the exhaust port of the roasting furnace.

[0011] Preferably, the support structure includes a leg, a support frame, and a valve. The leg and the support frame both have through holes, and the leg and the support frame are fixed together by the valve.

[0012] Preferably, a pressure sensing element is provided on one side of the bend.

[0013] Beneficial effects

[0014] This utility model provides an energy-saving flue gas exhaust device for a roasting furnace, which has the following advantages compared with the existing technology:

[0015] This invention replaces the traditional sloping flue structure with a direct-connection metal exhaust device, creating an efficient path from the furnace opening directly to the annular main flue. A specially designed variable-diameter pipe perfectly covers the furnace opening, effectively eliminating local resistance at the interface, and eliminating the need for the sloping flue and connecting hood, thus reducing flue gas flow resistance.

[0016] In terms of the sealing system, this utility model adopts a triple protection mechanism: the bellows compensator automatically adjusts thermal deformation to ensure the long-term sealing of the pipe joint; the new plastic-metal composite sealing plate realizes the dynamic sealing of the furnace cover; and the plug valve snap-fit ​​support frame provides stable rigid fixation, enhancing the sealing performance of the pipeline.

[0017] This utility model is installed by hoisting and is used in a cyclical manner around the use of the roasting furnace. By increasing the flue gas throughput, it effectively utilizes the waste heat of the flue gas to preheat the graphite, saving energy and achieving energy-saving production. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the device structure of this utility model;

[0020] Figure 2 This is a top view of the main body of the flue gas duct of this utility model;

[0021] Figure 3 This is a front view of the split flue gas duct of this utility model;

[0022] Figure 4 This is a side view of the support structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the usage state of this utility model;

[0024] In the picture:

[0025] 1. Main body of flue gas duct; 101. Main duct; 102. Pipe plug; 103. Bend; 104. Hanger; 105. Handle; 106. Sealing structure.

[0026] 2. Flue gas ductwork is divided into sections: 201. Branch duct; 202. Slide valve; 2021. Support hook one; 203. Corrugated pipe; 204. Reducer; 2041. Support hook two; 205. Pressure sensor; 206. Adjustable suspension device.

[0027] 3. Support structure, 301. Outrigger, 302. Support frame, 303. Inlet valve.

[0028] 4. Roasting oven. Detailed Implementation

[0029] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. The technical solutions of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0030] Please see Figure 1-5 This utility model provides a technical solution:

[0031] An energy-saving flue gas exhaust device for a roasting furnace includes a main flue gas duct 1, a flue gas duct sub-section 2, and a supporting structure 3. The supporting structures 3 are located on both sides of the main flue gas duct 1. The flue gas duct sub-section 2 is located below the main flue gas duct 1, and the main flue gas duct 1 and the flue gas duct sub-section 2 are fixedly connected and internally interconnected. The flue gas duct sub-section 2 is equipped with a pressure sensing element 205. This device significantly reduces flue gas flow resistance by optimizing the exhaust path and sealing structure 106, thus solving the problem of excessive energy consumption in traditional roasting furnace exhaust systems.

[0032] In some embodiments, the flue gas duct body 1 includes: a main duct 101, a duct plug 102, and a bend 103. A hanger 104 is provided in the middle of the main duct 101, and a duct plug 102 is provided on one side of the main duct 101. The duct plug 102 is bolted and fixed to the main duct 101, and a handle 105 is installed on the duct plug 102. The bend 103 is fixedly connected to the other side of the main duct 101, and an auxiliary sealing structure 106 is provided below the bend 103. The main duct 101 is made of high-temperature resistant alloy steel, with a smooth inner wall to reduce frictional resistance. The duct plug 102 is designed for quick disassembly, facilitating system maintenance and cleaning. The bend 103 features a large radius of curvature, effectively reducing pressure loss during flue gas diversion. The auxiliary sealing structure 106 includes a high-temperature silicone gasket and a metal pressure ring to ensure airtightness at the connection.

[0033] In some embodiments, the flue gas duct section 2 includes a branch pipe 201, a gate valve 202, a bellows pipe 203, and a reducer pipe 204. The gate valve 202 is fixedly connected below the branch pipe 201, the bellows pipe 203 is fixedly connected below the gate valve 202, and the reducer pipe 204 is fixedly connected below the bellows pipe 203. A pressure sensing element 205 is provided on one side of the reducer pipe 204. The branch pipe 201 is connected to the main pipe 101 by a flange, with a smooth transition in the internal flow path. The gate valve 202 is equipped with a high-temperature resistant ceramic sealing surface, enabling precise adjustment of the flue gas flow rate. The bellows pipe 203 adopts a multi-layer stainless steel structure, which can both compensate for thermal deformation and maintain the negative pressure of the system. The rectangular outlet at the lower end of the reducer pipe 204 perfectly matches the exhaust port of the roasting furnace 4, ensuring efficient flue gas collection. The pressure sensing element 205 monitors the pressure changes inside the pipe in real time, providing data support for system adjustment.

[0034] In some embodiments, the slide gate valve 202 is a manual slide gate valve.

[0035] In some embodiments, the slide gate valve 202 is an electrically operated slide gate valve.

[0036] In some embodiments, the support structure 3 includes a leg 301, a support frame 302, and a valve 303. Both the leg 301 and the support frame 302 have through holes, and the leg 301 and the support frame 302 are fixed together by the valve 303. The support structure 3 adopts a modular design. The height of the leg 301 is adjustable to adapt to different installation environments. The support frame 302 adopts a truss structure, which reduces weight while ensuring strength. The valve 303 connection method enables quick assembly and disassembly, facilitating equipment inspection and maintenance. This support system can effectively resist thermal stress deformation and ensure the long-term stable operation of the exhaust duct.

[0037] In some embodiments, support hooks 1 2021 are fixedly connected to both sides of the slide valve 202, and support hooks 2041 are fixedly connected to both sides of the reducer 204. The positions of support hooks 1 2021 and support hooks 2041 correspond to each other, and an adjustable suspension device 206 is slidably connected between support hooks 1 2021 and support hooks 2041. The support hooks are made of high-strength cast steel and have been treated with anti-corrosion coating. The adjustable suspension device 206 includes a stainless steel chain and a length adjuster, which can precisely control the suspension height and tension of the bellows 203 as needed. This design effectively prevents the bellows 203 from sagging due to its own weight, thus extending the service life of the equipment.

[0038] In some embodiments, the diameter of the upper opening of the reducer 204 corresponds to the diameter of the corrugated pipe 203, and the lower opening of the reducer 204 is rectangular, covering the exhaust port of the roasting furnace 4. The reducer 204 is designed using computer-aided fluid dynamics optimization, with a gradually changing internal flow channel shape to minimize local resistance loss; an elastic sealing ring is provided around the lower rectangular outlet to ensure a tight seal with the furnace body interface; and a built-in heat insulation layer on the pipe wall reduces the external surface temperature. This structure achieves a smooth transition of flue gas from the furnace body to the exhaust system, improving the overall system efficiency.

[0039] In some embodiments, a pressure sensing element 205 is provided on one side of the bend 103. This pressure sensing element 205 is a high-temperature pressure sensor that transmits data to the control system in real time via wireless transmission. The sensor's installation position is optimized through fluid simulation to accurately reflect the pressure status at key points. A matching temperature compensation algorithm ensures measurement accuracy. Through multi-point pressure monitoring, the system can automatically adjust the power of the induced draft fan and the opening degree of the gate valve 202 to achieve optimal smoke extraction.

[0040] In some embodiments, an additional operating chamber of the roasting furnace 4 is added to increase the number of chambers for preheating flue gas waste heat, thereby increasing the utilization of hot flue gas for preheating.

[0041] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered as falling within the scope of patent protection determined by the submitted claims.

Claims

1. An energy-saving flue gas exhaust device for a roasting furnace, characterized in that, It includes a flue gas duct body, a flue gas duct sub-section, and a support structure. The flue gas duct body has support structures on both the left and right sides. The flue gas duct sub-section is located below the flue gas duct body. The flue gas duct body and the flue gas duct sub-section are fixedly connected and internally interconnected. The flue gas duct sub-section is equipped with a gas pressure sensing element.

2. The energy-saving flue gas exhaust device for a roasting furnace according to claim 1, characterized in that: The flue gas duct body includes: a main pipe, a pipe plug, and a bend. A hanger is provided in the middle of the main pipe. A pipe plug is provided on one side of the main pipe. The pipe plug is bolted and fixed to the main pipe. A handle is installed on the pipe plug. A bend is fixedly connected to the other side of the main pipe. An auxiliary sealing structure is provided below the bend.

3. The energy-saving flue gas exhaust device for a roasting furnace according to claim 1, characterized in that: The flue gas duct is divided into a branch pipe, a gate valve, a bellows pipe, and a reducer pipe. A gate valve is fixedly connected to the bottom of the branch pipe, a bellows pipe is fixedly connected to the bottom of the gate valve, and a reducer pipe is fixedly connected to the bottom of the bellows pipe. A pressure sensing element is provided on one side of the reducer pipe.

4. The energy-saving flue gas exhaust device for a roasting furnace according to claim 3, characterized in that: The slide valve is fixedly connected to two sides with a first support hook, and the variable diameter pipe is fixedly connected to two sides with a second support hook. The positions of the first support hook and the second support hook are corresponding, and an adjustable suspension device is slidably connected between the first support hook and the second support hook.

5. The energy-saving flue gas exhaust device for a roasting furnace according to claim 3, characterized in that: The diameter of the upper opening of the reducing pipe corresponds to the diameter of the corrugated pipe, and the lower opening of the reducing pipe is rectangular, covering the exhaust port of the roasting furnace.

6. The energy-saving flue gas exhaust device for a roasting furnace according to claim 1, characterized in that: The support structure includes legs, a support frame, and a valve. Both the legs and the support frame have through holes, and the legs and the support frame are fixed together by the valve.

7. The energy-saving flue gas exhaust device for a roasting furnace according to claim 2, characterized in that: A pressure sensing element is provided on one side of the bend.

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