Flue of steel smelting equipment

Abstract

The utility model relates to the technical field of flue structures, and provides a steel smelting equipment flue which comprises a smoke inlet pipe, a middle pipe, a cover plate and a smoke exhaust pipe, the smoke inlet pipe comprises a vertical section, a transition section and a linear section which are sequentially arranged, the linear section is connected with the middle pipe, and the end, close to the transition section, of the linear section is higher than the end, close to the middle pipe, of the linear section; a flow slowing mechanism is arranged in the smoke exhaust pipe and located on the linear section, the flow slowing mechanism comprises a supporting frame, a rotating rod and fan blades, the supporting frame is installed in the smoke inlet pipe, the rotating rod is installed on the supporting frame, the fan blades are installed on the rotating rod, a spraying mechanism is arranged at the upper end in the middle pipe, and the spraying mechanism is installed on the cover plate. The cover plate is installed at the upper end of the middle pipe in a sealed mode, the smoke exhaust pipe is connected with the middle pipe, the end, away from the middle pipe, of the smoke exhaust pipe inclines upwards, and a heat exchange mechanism is arranged on the smoke exhaust pipe. The structure of the smoke inlet pipe is changed, and the flow slowing mechanism is arranged in the smoke inlet pipe, so that the flow speed of smoke entering the middle pipe is reduced, and the dust removal effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of flue structures, and in particular to a flue of steel smelting equipment. Background Art

[0002] Steel smelting is a general term for the metallurgical process of steel and iron. Since sintering flue gas will be produced during the steel smelting process, a fume hood is usually installed on the steel smelting equipment. After the flue gas enters the fume hood, it is discharged through the flue.

[0003] The prior art CN205957744U discloses a flue for steel smelting equipment, which divides the bottom of the flue main body into two parts: a lower discharge port and a smoke inlet pipe. The cooling structure and the spray structure on the flue main body, when high-temperature gas containing a large amount of dust enters the flue main body through the smoke inlet pipe, the spray structure humidifies the gas, the cooling structure cools the gas, the dust and water vapor combine with each other and sink to be discharged through the lower discharge port, and the relatively clean gas after treatment is discharged from the top of the flue main body, which reduces environmental pollution, meets market demand, and has a wide range of applications.

[0004] During the use of the above-mentioned prior art, due to the fast flow rate of the high-temperature dust-containing flue gas, part of the dust-containing flue gas moves upward along the flue main body without being humidified by the spray structure. Since a large amount of dust is mixed in this part of the gas, it will affect the cooling effect of the cooling mechanism and cause the dust to be discharged. The humidified gas will liquefy into water droplets after being cooled by the cooling mechanism. Part of the water droplets will flow downward along the inner wall of the flue main body to the smoke inlet pipe. The water droplets are easy to combine with the dust in the flue gas and adhere to the inner wall of the smoke inlet pipe, increasing the maintenance frequency of the smoke inlet pipe. If too much water enters, it will also enter the steel smelting equipment along the smoke inlet pipe, posing a safety hazard. Summary of the invention

[0005] The purpose of the embodiment of the present application is to provide a flue for steel smelting equipment, which reduces the flow rate of flue gas entering the intermediate pipe by changing the structure of the smoke inlet pipe and setting a slow flow mechanism in the smoke inlet pipe, thereby improving the dust treatment effect.

[0006] The present application embodiment provides a flue of a steel smelting equipment, which adopts the following technical solutions:

[0007] A flue of steel smelting equipment comprises a smoke inlet pipe, an intermediate pipe, a cover plate and a smoke exhaust pipe, wherein the smoke inlet pipe comprises a vertical section, a transition section and a straight section arranged in sequence, the straight section connects the intermediate pipe, an end of the straight section close to the transition section is higher than an end of the straight section close to the intermediate pipe, a slow flow mechanism is arranged inside the smoke exhaust pipe, the slow flow mechanism is located in the straight section, the slow flow mechanism comprises a support frame, a rotating rod and a plurality of fan blades, the support frame is installed inside the smoke inlet pipe, the rotating rod is installed on the support frame, the fan blades are installed on the rotating rod, a spray mechanism is arranged at the upper end of the interior of the intermediate pipe, the spray mechanism is installed on the cover plate, the cover plate is sealingly installed at the upper end of the intermediate pipe, the smoke exhaust pipe is connected to the intermediate pipe, an end of the smoke exhaust pipe away from the intermediate pipe is higher than an end of the smoke exhaust pipe close to the intermediate pipe, and a heat exchange mechanism is arranged on the smoke exhaust pipe.

[0008] Preferably, the spray mechanism includes a water pump, a water inlet pipe, a delivery pipe and a plurality of nozzles, the water pump is installed on the cover plate, one end of the water inlet pipe is connected to the water pump, the other end of the water inlet pipe passes through the cover plate, the water inlet pipe is connected to the delivery pipe, the delivery pipe is installed on the cover plate, and a plurality of nozzles are installed on the delivery pipe.

[0009] Preferably, the nozzle is an atomizing nozzle.

[0010] Preferably, the heat exchange mechanism comprises a heat exchange tube, and the heat exchange tube is spirally wound around the outer side of the smoke exhaust pipe.

[0011] Preferably, the heat exchange mechanism further comprises a heat insulation sleeve, which is arranged on the outside of the smoke exhaust pipe, the heat exchange pipe is arranged between the heat insulation sleeve and the smoke exhaust pipe, and both ends of the heat exchange pipe respectively pass through the heat insulation sleeve.

[0012] Preferably, the smoke exhaust pipe is provided with spiral blades inside, and an outlet pipe is provided at the upper end of the smoke exhaust pipe on a side away from the intermediate pipe.

[0013] Preferably, a motor is provided at one end of the smoke exhaust pipe away from the intermediate pipe, and the motor drives the spiral blade to rotate.

[0014] Preferably, the transition section is an arc-shaped structure.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The present application changes the structure of the smoke inlet pipe and sets a slow flow mechanism in the smoke inlet pipe. After the gas enters the straight section of the smoke inlet pipe, it will act on the fan blades, causing the rotating rod and the fan blades to rotate synchronously, thereby reducing the flow rate of the gas when it enters the intermediate pipe, extending the gas passing time in the intermediate pipe, and improving the dust removal effect.

[0017] After the gas enters the middle tube, it moves upward. Under the action of the spraying mechanism, dust and water combine with each other and sink. Since the end of the straight section of the smoke inlet pipe close to the transition section is higher than the end of the straight section close to the middle tube, the water vapor generated during the spraying process can be prevented from condensing into water droplets and entering the smoke inlet pipe. The relatively clean gas after treatment enters the smoke exhaust pipe through the middle tube, and is discharged after heat exchange by the heat exchange mechanism. Since the end of the smoke exhaust pipe away from the middle tube is higher than the end of the smoke exhaust pipe close to the middle tube, the water vapor generated during the spraying process condenses into water droplets inside the smoke exhaust pipe, and then flows into the inside of the middle tube and falls along the inner wall of the middle tube, thereby improving the cleanliness of the gas discharged from the smoke exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of some embodiments of the utility model;

[0020] Figure 2 for Figure 1 A magnified view of the structure in the middle.

[0021] The reference numerals are:

[0022] 1. Smoke inlet pipe; 2. Intermediate pipe; 3. Cover plate; 4. Smoke exhaust pipe; 5. Vertical section; 6. Transition section; 7. Straight section; 8. Slow flow mechanism; 9. Spray mechanism; 10. Heat exchange mechanism; 11. Support frame; 12. Rotating rod; 13. Fan blade; 14. Water pump; 15. Water inlet pipe; 16. Delivery pipe; 17. Nozzle; 18. Heat exchange pipe; 19. Insulation sleeve; 20. Spiral blade; 21. Outlet pipe; 22. Motor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Example

[0030] like Figure 1 and Figure 2As shown, the flue of the iron and steel smelting equipment described in the embodiment of the present application includes a smoke inlet pipe 1, an intermediate pipe 2, a cover plate 3 and a smoke exhaust pipe 4, the smoke inlet pipe 1 includes a vertical section 5, a transition section 6 and a straight section 7 arranged in sequence, the straight section 7 is connected to the intermediate pipe 2, the end of the straight section 7 close to the transition section 6 is higher than the end of the straight section 7 close to the intermediate pipe 2, a slow flow mechanism 8 is arranged inside the smoke exhaust pipe 4, the slow flow mechanism 8 is located in the straight section 7, the slow flow mechanism 8 includes a support frame 11, a rotating rod 12 and a plurality of fan blades 13, the support frame 11 is installed inside the smoke inlet pipe 1, the rotating rod 12 is installed on the support frame 11, the fan blades 13 are installed on the rotating rod 12, a spray mechanism 9 is arranged at the upper end of the interior of the intermediate pipe 2, the spray mechanism 9 is installed on the cover plate 3, the cover plate 3 is sealed and installed at the upper end of the intermediate pipe 2, the smoke exhaust pipe 4 is connected to the intermediate pipe 2, the end of the smoke exhaust pipe 4 away from the intermediate pipe 2 is higher than the end of the smoke exhaust pipe 4 close to the intermediate pipe 2, and a heat exchange mechanism 10 is arranged on the smoke exhaust pipe 4.

[0031] After the gas enters the straight section 7 of the smoke inlet pipe 1, it will act on the fan blades 13, causing the rotating rod 12 and the fan blades 13 to rotate synchronously, thereby reducing the flow rate of the gas when entering the intermediate pipe 2, prolonging the gas passing time in the intermediate pipe 2, and improving the dust removal effect. After the gas enters the intermediate pipe 2, it will move upward. Under the action of the spraying mechanism 9, the dust and water combine with each other and sink. Since the end of the straight section 7 of the smoke inlet pipe 1 close to the transition section 6 is higher than the end of the straight section 7 close to the intermediate pipe 2, it can prevent the water vapor generated during the spraying process from condensing into water droplets and entering the smoke inlet pipe 1. The relatively clean gas after treatment enters the smoke exhaust pipe 4 through the intermediate pipe 2, and is discharged after heat exchange by the heat exchange mechanism 10. Since the end of the smoke exhaust pipe 4 away from the intermediate pipe 2 is higher than the end of the smoke exhaust pipe 4 close to the intermediate pipe 2, the water vapor generated during the spraying process condenses into water droplets inside the smoke exhaust pipe 4, and then flows into the interior of the intermediate pipe 2 and falls along the inner wall of the intermediate pipe 2, thereby improving the cleanliness of the gas discharged from the smoke exhaust pipe 4.

[0032] In this embodiment, the spray mechanism 9 includes a water pump 14, a water inlet pipe 15, a delivery pipe 16 and a plurality of nozzles 17. The water pump 14 is installed on the cover plate 3. One end of the water inlet pipe 15 is connected to the water pump 14. The other end of the water inlet pipe 15 passes through the cover plate 3. The water inlet pipe 15 is connected to the delivery pipe 16. The delivery pipe 16 is installed on the cover plate 3. A plurality of nozzles 17 are installed on the delivery pipe 16. When in use, under the action of the water pump 14, water is pumped to the water inlet pipe 15 and the delivery pipe 16, and sprayed out through a plurality of nozzles 17. The water and the dust in the gas combine with each other and sink, thereby realizing dust removal of the gas.

[0033] In this embodiment, the nozzle 17 is an atomizing nozzle 17 to improve the dust removal effect.

[0034] In this embodiment, the heat exchange mechanism 10 includes a heat exchange tube 18, which is spirally wound around the outside of the smoke exhaust pipe 4 to increase the contact surface between the heat exchange tube 18 and the smoke exhaust pipe 4 and improve the heat exchange effect.

[0035] In this embodiment, the heat exchange mechanism 10 also includes an insulating sleeve 19, which is arranged on the outside of the smoke exhaust pipe 4, and the heat exchange tube 18 is arranged between the insulating sleeve 19 and the smoke exhaust pipe 4. Both ends of the heat exchange tube 18 pass through the insulating sleeve 19 respectively. The setting of the insulating sleeve 19 is used to reduce heat loss.

[0036] In this embodiment, a spiral blade 20 is provided inside the smoke exhaust pipe 4, and an outlet pipe 21 is provided at the upper end of the smoke exhaust pipe 4 on the side away from the intermediate pipe 2. The spiral blade 20 forms a spiral air duct inside the smoke exhaust pipe 4, which has a barrier effect on dust and water droplets at the same time, further improves the dust removal effect, and improves the cleanliness of the gas discharged from the outlet pipe 21.

[0037] In this embodiment, a motor 22 is provided at one end of the smoke exhaust pipe 4 away from the middle pipe 2. The motor 22 drives the spiral blades 20 to rotate. When the smoke exhaust pipe 4 needs to be cleaned, water is injected into the smoke exhaust pipe 4 through the outlet pipe 21. While the motor 22 drives the spiral blades 20 to rotate, the spiral blades 20 contact the inner wall surface of the smoke exhaust pipe 4, thereby facilitating the cleaning of the inner wall of the smoke exhaust pipe 4 and extending the service life of the smoke exhaust pipe 4.

[0038] In this embodiment, the transition section 6 is an arc-shaped structure, which reduces the kinetic energy loss of the gas during the flow between the vertical section 5 of the smoke exhaust pipe 4 and the transition section 6 of the smoke exhaust pipe 4 .

[0039] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flue of steel smelting equipment, characterized in that: The smoke exhaust pipe comprises a smoke inlet pipe, an intermediate pipe, a cover plate and a smoke exhaust pipe, wherein the smoke inlet pipe comprises a vertical section, a transition section and a straight section arranged in sequence, the straight section connects the intermediate pipe, an end of the straight section close to the transition section is higher than an end of the straight section close to the intermediate pipe, a slow flow mechanism is arranged inside the smoke exhaust pipe, the slow flow mechanism is located in the straight section, the slow flow mechanism comprises a support frame, a rotating rod and a plurality of fan blades, the support frame is installed inside the smoke inlet pipe, the rotating rod is installed on the support frame, the fan blades are installed on the rotating rod, a spray mechanism is arranged at the upper end of the interior of the intermediate pipe, the spray mechanism is installed on the cover plate, the cover plate is sealingly installed at the upper end of the intermediate pipe, the smoke exhaust pipe is connected to the intermediate pipe, an end of the smoke exhaust pipe away from the intermediate pipe is higher than an end of the smoke exhaust pipe close to the intermediate pipe, and a heat exchange mechanism is arranged on the smoke exhaust pipe.

2. The flue of steel smelting equipment according to claim 1, characterized in that: The spray mechanism includes a water pump, a water inlet pipe, a delivery pipe and a plurality of nozzles. The water pump is installed on the cover plate. One end of the water inlet pipe is connected to the water pump. The other end of the water inlet pipe passes through the cover plate. The water inlet pipe is connected to the delivery pipe. The delivery pipe is installed on the cover plate. A plurality of nozzles are installed on the delivery pipe.

3. The flue of steel smelting equipment according to claim 2, characterized in that: The nozzle is an atomizing nozzle.

4. The flue of steel smelting equipment according to claim 1, characterized in that: The heat exchange mechanism comprises a heat exchange tube, and the heat exchange tube is spirally wound around the outer side of the smoke exhaust pipe.

5. The flue of steel smelting equipment according to claim 4, characterized in that: The heat exchange mechanism further includes a heat insulation sleeve, which is arranged on the outside of the smoke exhaust pipe. The heat exchange pipe is arranged between the heat insulation sleeve and the smoke exhaust pipe. Both ends of the heat exchange pipe respectively pass through the heat insulation sleeve.

6. The flue of steel smelting equipment according to claim 1, characterized in that: The smoke exhaust pipe is provided with spiral blades inside, and an outlet pipe is provided at the upper end of the smoke exhaust pipe on a side away from the middle pipe.

7. The flue of steel smelting equipment according to claim 6, characterized in that: A motor is arranged at one end of the smoke exhaust pipe away from the middle pipe, and the motor drives the spiral blade to rotate.

8. The flue of steel smelting equipment according to claim 1, characterized in that: The transition section is an arc-shaped structure.

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