Silicon iron green casting flue gas recovery device

Abstract

The utility model is suitable for flue gas recovery equipment technical field provides a kind of silicon iron green casting flue gas recovery device, by induced draft fan drive formation negative pressure system, flue gas is in turn through flue gas cover→suction pipe→heat exchange mechanism→bag filter completes capture and purification;Heat exchange mechanism is provided with serpentine pipe and gas resistance board in, equidistantly arranged gas resistance board is provided in box, adjacent gas resistance board and box form dislocation clearance cavity, bag filter is connected in series with heat exchange mechanism by communicating tube, high-temperature flue gas is serpentine flow in box and exchanges heat with cooling water.Recycled hot water can be used for workshop heating or production process preheating, energy saving.Induced draft fan impeller is driven the rotation impeller of water delivery mechanism by sprocket-chain, realizes the transmission of induced draft fan power to water pump;Water delivery mechanism extracts external cooling water by water suction pipe and injects serpentine pipe.Independent water pump motor is cancelled, and equipment energy consumption is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of flue gas recovery equipment, and in particular relates to a green casting flue gas recovery device for ferrosilicon. Background Technology

[0002] High-temperature dusty fumes (temperature 800-1200℃, SiO2 particles <5μm > 60%) generated during ferrosilicon casting are one of the main sources of pollution in the metallurgical industry. Currently, the design of fixed casting equipment and fume hoods, with the lower casting pool moving laterally, is a common automated and efficient production layout in industrial casting (especially in metal casting).

[0003] Existing technologies (such as CN216138100U) disclose a ferrosilicon casting flue gas treatment device, which achieves basic dust removal functions through a fixed fume hood, a bag filter, and a simple exhaust duct. Its structural features include: a fixed fume hood installed above the casting mold, drawing in flue gas through negative pressure; a bag filter for filtering and removing dust from the flue gas; and a single-stage exhaust duct for direct discharge or discharge after preliminary cooling.

[0004] However, the design does not involve waste heat recovery and dynamic adjustment functions, and has the following limitations: no waste heat recovery device is configured for flue gas, and the sensible heat of high-temperature flue gas is not utilized; the power system is redundant (multiple motors drive independently), resulting in low energy efficiency.

[0005] In view of this, this utility model proposes a green ferrosilicon casting flue gas recovery device. Utility Model Content

[0006] This utility model provides a green ferrosilicon casting flue gas recovery device, which aims to solve the problems of the lack of flue gas waste heat recovery device in the current ferrosilicon casting process, the failure to utilize the sensible heat of high-temperature flue gas, and the redundancy of the power system.

[0007] This utility model is implemented as follows: a silicon-iron green casting flue gas recovery device, comprising: A fume hood is installed above the casting mold; A bag filter is installed on one side of the flue gas hood; A support column fixed to the outside of the bag filter for supporting the bag filter; Two crossbeams fixed to the outer wall of the support column; Heat exchange mechanism installed on top of the two beams; A suction pipe is fixedly connected between the flue hood and the heat exchange mechanism; An induced draft fan is installed on one side of the bag filter to draw air from the inside of the bag filter. A connecting pipe is fixedly connected between the heat exchange mechanism and the bag filter; A water supply mechanism is installed on one side of the bag filter; A transmission mechanism connecting the water conveying mechanism and the induced draft fan.

[0008] Preferably, the heat exchange mechanism includes a box body fixed to the top of two crossbeams, and a serpentine tube is provided inside the box body, with the inlet and outlet ends of the serpentine tube penetrating the outer wall of the box body.

[0009] Preferably, a plurality of air-blocking plates are fixedly connected at equal intervals to the inner side of the box, and the air-blocking plates are sleeved on the outer wall of the serpentine tube.

[0010] Preferably, one end of each air baffle plate forms a gap cavity with the inner wall of the box, and two adjacent gap cavities are staggered in the vertical direction.

[0011] Preferably, the water conveying mechanism includes a housing fixed to the outer wall of the bag filter, a rotating impeller rotatably connected to the inner side of the housing via a shaft, a water intake pipe fixedly connected to the outer wall at the center of the housing, a drain pipe fixedly connected to the side wall of the housing, and the drain pipe fixedly connected to the water inlet.

[0012] Preferably, the induced draft fan is fixedly installed on the outer wall of the bag filter, and the air inlet pipe on the induced draft fan is fixedly connected to the bag filter.

[0013] Preferably, the transmission mechanism includes a bearing fixed to the top of the bag filter, a rotating shaft rotatably connected inside the bearing, one end of the rotating shaft rotatably passing through the outer wall of the air inlet pipe and fixedly connected to the center of the impeller inside the induced draft fan.

[0014] Preferably, the transmission mechanism further includes two sprockets, with a chain connecting the two sprockets. One of the sprockets is fixedly connected to the end of the rotating shaft, and the other sprocket is coaxially fixedly connected to the center of a rotating impeller disposed inside the housing.

[0015] Compared with related technologies, the silicon-iron green casting flue gas recovery device provided by this utility model has the following beneficial effects: 1. Flue Gas Capture and Waste Heat Recovery Integrated Design: A negative pressure system is created by an induced draft fan. Flue gas sequentially passes through a flue hood → suction pipe → heat exchange mechanism → bag filter for capture and purification. The heat exchange mechanism is equipped with serpentine tubes and baffle plates, and the box contains equidistantly arranged baffle plates. Adjacent baffle plates form staggered gap cavities with the box body. The bag filter is connected in series with the heat exchange mechanism via a connecting pipe. The high-temperature flue gas flows in a serpentine pattern within the box and exchanges heat with cooling water. This allows the circulating water to efficiently absorb the heat from the high-temperature flue gas, and the recovered hot water can be used for workshop heating or preheating of production processes, saving energy.

[0016] 2. Power-sharing transmission system: The induced draft fan impeller drives the rotating impeller of the water conveying mechanism via a sprocket and chain, realizing the transmission of power from the induced draft fan to the water pump; the water conveying mechanism draws external cold water through the water intake pipe and injects it into the serpentine pipe. This eliminates the need for a separate water pump motor, reducing equipment energy consumption, and simultaneously optimizes heat exchange efficiency through dynamic matching of water flow rate and flue gas volume. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the internal structure of the heat exchange mechanism of this utility model; Figure 4 for Figure 1 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Fume hood; 2. Suction pipe; 3. Heat exchange mechanism; 301. Housing; 302. Serpentine pipe; 303. Air baffle; 304. Gap cavity; 305. Water inlet; 306. Water outlet; 4. Crossbeam; 5. Support column; 6. Bag filter; 7. Exhaust fan; 701. Air inlet pipe; 8. Transmission mechanism; 801. Shaft seat; 802. Rotating shaft; 803. Sprocket; 804. Chain; 9. Water supply mechanism; 901. Shell; 902. Drain pipe; 903. Water intake pipe; 904. Rotating impeller; 10. Connecting pipe. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Example 1 A preferred embodiment of the silicon ferrosilicon green casting flue gas recovery device provided by this utility model is, for example... Figures 1 to 4 As shown: A green ferrosilicon casting flue gas recovery device includes a flue gas hood 1 disposed above the casting mold; a bag filter 6 disposed on one side of the flue gas hood 1; a support column 5 fixed to the outside of the bag filter 6 for supporting the bag filter 6; two crossbeams 4 fixed to the outer wall of the support column 5; a heat exchange mechanism 3 installed on the top of the two crossbeams 4; a suction pipe 2 fixedly connecting the flue gas hood 1 and the heat exchange mechanism 3; an induced draft fan 7 disposed on one side of the bag filter 6 for suction of the inside of the bag filter 6; a connecting pipe 10 fixedly connecting the heat exchange mechanism 3 and the bag filter 6; a water conveying mechanism 9 disposed on one side of the bag filter 6; and a transmission mechanism 8 connecting the water conveying mechanism 9 and the induced draft fan 7.

[0022] Specifically, the heat exchange mechanism 3 includes a box 301 fixed to the top of two crossbeams 4. A serpentine tube 302 is provided inside the box 301, and the inlet end 305 and outlet end 306 of the serpentine tube 302 both penetrate the outer wall of the box 301. Multiple air baffles 303 are fixedly and equidistantly to the inner side of the box 301, and the air baffles 303 are sleeved on the outer wall of the serpentine tube 302. One end of each air baffle 303 forms a gap cavity 304 with the inner wall of the box 301, and adjacent gap cavities 304 are staggered in the vertical direction.

[0023] Furthermore, the induced draft fan 7 is fixedly installed on the outer wall of the bag filter 6, and the air inlet pipe 701 on the induced draft fan 7 is fixedly connected to the bag filter 6.

[0024] In this embodiment, during the ferrosilicon casting process, the induced draft fan 7 is started, and its internal impeller rotates to create a negative pressure inside the bag filter 6 through the air inlet pipe 701. Then, it draws the air from the inside of the box 301 on the heat exchange mechanism 3 through the connecting pipe 10, so that a negative pressure is created inside the box 301. This allows the exhaust pipe 2 to draw the exhaust gas from the fume hood 1, and the exhaust gas generated during the ferrosilicon casting process and dispersed above the casting mold is drawn out through the exhaust hood 1.

[0025] In this embodiment, the high-temperature flue gas drawn in by the suction pipe 2 and the flue hood 1 enters the housing 301. Under the obstruction of multiple air baffles 303, the flue gas flows in a serpentine pattern inside the housing 301 and is transported to the bag filter 6 for dust removal through the connecting pipe 10. A drain valve, such as a flip-open door or pull-out panel, is provided at the bottom of the housing 301 to periodically clean the sediment at the bottom of the housing 301.

[0026] Example 2 Based on Example 1, a preferred embodiment of the silicon-iron green casting flue gas recovery device provided by this utility model is as follows: Figures 1 to 4As shown: The water conveying mechanism 9 includes a housing 901 fixed to the outer wall of the bag filter 6. A rotating impeller 904 is rotatably connected to the inner side of the housing 901 via a shaft. A water intake pipe 903 is fixedly connected to the outer wall at the center of the housing 901. A drain pipe 902 is fixedly connected to the side wall of the housing 901. The drain pipe 902 is fixedly connected to the water inlet 305.

[0027] Specifically, the transmission mechanism 8 includes a bearing seat 801 fixed to the top of the bag filter 6. A rotating shaft 802 is rotatably connected inside the bearing seat 801. One end of the rotating shaft 802 rotatably passes through the outer wall of the air inlet pipe 701 and is fixedly connected to the center of the impeller inside the induced draft fan 7. The transmission mechanism 8 also includes two sprockets 803, with a chain 804 drivingly connecting the two sprockets 803. One sprocket 803 is fixedly connected to the end of the rotating shaft 802, and the other sprocket 803 is coaxially fixedly connected to the center of the rotating impeller 904 disposed inside the housing 901.

[0028] In this embodiment, while the induced draft fan 7 is working, the impeller inside the induced draft fan 7 drives the rotating shaft 802 to rotate. Under the action of the chain 804, the rotating shaft 802 drives the two sprockets 803 to rotate synchronously. The lower sprocket 803 drives the rotating impeller 904 inside the housing 901 to rotate. The water intake pipe 903 is connected to the external water supply equipment in advance, so that the housing 901 draws external water through the water intake pipe 903 and flows into the serpentine pipe 302 through the drain pipe 902 and the water inlet 305. After circulating through the serpentine pipe 302, it is discharged through the water outlet 306. The high-temperature flue gas drawn by the suction pipe 2 and the flue gas hood 1 will enter the housing 301. Under the obstruction of multiple air baffles 303, the flue gas flows in a serpentine pattern inside the housing 301 and is transported to the bag filter 6 through the connecting pipe 10 for dust removal, realizing heat exchange between water and flue gas. The water after heat exchange can be used for workshop heating.

[0029] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0030] It should be understood that the disclosed apparatus can be implemented in other ways, as illustrated in the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division of a silicon-iron green casting flue gas recovery device. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A green casting flue gas recovery device for ferrosilicon, characterized in that, include: A fume hood (1) is installed above the casting mold; A bag filter (6) is installed on one side of the flue gas hood (1); A support column (5) is fixed to the outside of the bag filter (6) for supporting the bag filter (6); Two crossbeams (4) are fixed to the outer wall of the support (5); Heat exchange mechanism (3) installed on top of the two beams (4); A suction pipe (2) is fixedly connected between the flue gas hood (1) and the heat exchange mechanism (3); An induced draft fan (7) is installed on one side of the bag filter (6) to draw air from the inside of the bag filter (6). A connecting pipe (10) is fixedly connected between the heat exchange mechanism (3) and the bag filter (6); Water supply mechanism (9) is provided on one side of the bag filter (6); A transmission mechanism (8) connecting the water conveying mechanism (9) and the induced draft fan (7).

2. The silicon-iron green casting flue gas recovery device as described in claim 1, characterized in that, The heat exchange mechanism (3) includes a box (301) fixed to the top of two crossbeams (4). A serpentine tube (302) is provided inside the box (301). The water inlet (305) and water outlet (306) on the serpentine tube (302) both penetrate the outer wall of the box (301).

3. The silicon-iron green casting flue gas recovery device as described in claim 2, characterized in that, Multiple air-blocking plates (303) are fixedly connected at equal intervals on the inner side of the box (301), and the air-blocking plates (303) are sleeved on the outer wall of the serpentine tube (302).

4. The silicon-iron green casting flue gas recovery device as described in claim 3, characterized in that, Each of the air baffles (303) forms a gap cavity (304) between one end and the inner wall of the box (301), and two adjacent gap cavities (304) are staggered in the vertical direction.

5. The silicon-iron green casting flue gas recovery device as described in claim 4, characterized in that, The water conveying mechanism (9) includes a housing (901) fixed to the outer wall of the bag filter (6), a rotating impeller (904) is rotatably connected to the inner side of the housing (901) via a shaft, a water intake pipe (903) is fixedly connected to the outer wall at the center of the housing (901), and a drain pipe (902) is fixedly connected to the side wall of the housing (901). The drain pipe (902) is fixedly connected to the water inlet (305).

6. The silicon-iron green casting flue gas recovery device as described in claim 5, characterized in that, The induced draft fan (7) is fixedly installed on the outer wall of the bag filter (6), and the air inlet pipe (701) on the induced draft fan (7) is fixedly connected to the bag filter (6).

7. The silicon-iron green casting flue gas recovery device as described in claim 6, characterized in that, The transmission mechanism (8) includes a bearing seat (801) fixed to the top of the bag filter (6), and a rotating shaft (802) is rotatably connected inside the bearing seat (801). One end of the rotating shaft (802) rotatably passes through the outer wall of the air inlet pipe (701) and is fixedly connected to the center of the impeller inside the induced draft fan (7).

8. The silicon-iron green casting flue gas recovery device as described in claim 7, characterized in that, The transmission mechanism (8) also includes two sprockets (803), and a chain (804) is connected between the two sprockets (803). One of the sprockets (803) is fixed to the end of the shaft (802), and the other sprocket (803) is coaxially fixed to the center of the rotating impeller (904) provided inside the housing (901).

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