Energy-saving raw material preheating furnace for zinc oxide production and preheating method thereof

Abstract

The invention belongs to the technical field of energy-saving type preheating furnaces, particularly relates to an energy-saving type raw material preheating furnace for zinc oxide production and a preheating method of the energy-saving type raw material preheating furnace, and aims to overcome the defects that raw materials cannot be effectively dispersed and the preheating temperature cannot be adjusted when zinc oxide is preheated in the prior art. According to the zinc oxide raw material preheating device, hot air can be stably introduced into the preheating box to preheat a zinc oxide raw material, and meanwhile, the zinc oxide raw material can be dispersed while being preheated, so that the zinc oxide raw material can be quickly and uniformly heated; and the flow amount of hot air can be adjusted according to actual requirements, so that the temperature in the preheating box can be adjusted when the zinc oxide raw material is preheated.

Description

Technical Field

[0001] The invention relates to the technical field of energy-saving preheating furnaces, and in particular to an energy-saving raw material preheating furnace for zinc oxide production and a preheating method thereof. Background Art

[0002] In the production process of zinc oxide, the rotary kiln will emit a large amount of tail gas, which contains a high amount of waste heat. In order to make full use of this waste heat, most of the raw materials are preheated by preheaters to increase the temperature of the materials themselves, so as to facilitate the calcination of the materials in the rotary kiln.

[0003] However, the existing preheating furnace (for example, a raw material preheating furnace for zinc oxide production disclosed in the patent with announcement number CN213657546U) still has the following shortcomings in actual use:

[0004] 1. When preheating the zinc oxide raw materials, the preheating furnace cannot disperse the raw materials, resulting in uneven heating of the zinc oxide raw materials during the preheating process;

[0005] 2. When hot air is injected into the preheating box, the preheating furnace cannot adjust the flow of hot air, so it is difficult to conveniently adjust the temperature inside the preheating box. This makes it difficult to accurately grasp the required preheating temperature when preheating zinc oxide.

[0006] In view of the above problems, the present invention document proposes an energy-saving raw material preheating furnace and a preheating method thereof for zinc oxide production. Summary of the invention

[0007] The invention provides an energy-saving raw material preheating furnace for zinc oxide production and a preheating method thereof, which solves the shortcomings of the prior art that zinc oxide cannot be dispersed and the temperature cannot be adjusted when zinc oxide is preheated.

[0008] The present invention provides the following technical solutions:

[0009] An energy-saving raw material preheating furnace for zinc oxide production comprises a base, a plurality of columns are fixedly installed on one side of the top of the base, a same preheating box is fixedly installed on the top of the plurality of columns, a cover plate is tightly clamped at the top opening of the preheating box, and the preheating furnace also comprises:

[0010] An adjusting mechanism, the adjusting mechanism passes through the bottom inner wall of the preheating box and is connected to the bottom inner wall of the preheating box, the top of the adjusting mechanism extends to the top of the cover plate and is connected to the top of the cover plate, and the adjusting mechanism is used to adjust the flow of hot air delivered to the preheating box;

[0011] The preheating mechanism is installed in the preheating box, the regulating mechanism passes through the preheating mechanism and is connected to the preheating mechanism, the top of the preheating mechanism passes through the cover plate and extends to the top of the cover plate, and is connected to the preheating mechanism, and the preheating mechanism is used to disperse the hot air transported into the preheating box;

[0012] A dispersion mechanism is installed on the top of the cover plate, and the bottom of the dispersion mechanism extends into the preheating box and is connected to the preheating mechanism. The dispersion mechanism is used to disperse the zinc oxide raw material so that the zinc oxide raw material can be evenly heated;

[0013] The gas delivery mechanism is installed on the other side of the top of the base, one end of the gas delivery mechanism is connected to the regulating mechanism, and the gas delivery mechanism is used to transport the hot gas discharged from the rotary kiln.

[0014] In a possible design, the regulating mechanism includes a regulating box that passes through the bottom inner wall of the preheating box and is fixedly connected to the bottom inner wall of the preheating box, one end of the gas transmission mechanism extends into the regulating box and is fixedly connected to the bottom inner wall of the regulating box, a movable cover is tightly arranged in the regulating box, the top of the movable cover extends into the preheating mechanism, first flow holes are provided on the bottom inner walls on both sides of the movable cover, and second flow holes are provided on the top inner walls on both sides of the regulating box, the first flow holes are connected to the corresponding second flow holes, a lifting assembly is installed on the top of the movable cover, the top of the lifting assembly passes through the preheating mechanism and the cover plate respectively and extends to the top of the cover plate, and the lifting assembly is installed on the top of the cover plate.

[0015] In a possible design, the lifting assembly includes a mounting ring installed on the preheating mechanism, an adjusting screw passing through the mounting ring and rotatably connected, a nut is fixedly installed on the top inner wall of the movable cover, the adjusting screw passes through the top inner wall of the movable cover and the nut respectively and is threadedly connected with the nut, a transmission shaft is fixedly installed on the top of the adjusting screw, the top of the transmission shaft passes through the cover plate and extends to the top of the cover plate, the transmission shaft is rotatably connected to the cover plate, an adjusting motor is fixedly installed on the top of the cover plate, an active bevel gear is fixedly installed on the output shaft of the adjusting motor, a driven bevel gear is fixedly installed on the top of the transmission shaft, and the active bevel gear is meshed with the driven bevel gear.

[0016] In a possible design, limiting plates are fixedly installed on the tops of both sides of the movable cover, limiting frames are slidably connected to the limiting plates, and the tops of the two limiting frames are connected to the preheating mechanism.

[0017] In one possible design, the preheating mechanism includes a plurality of support tubes that all penetrate the cover plate and are fixedly connected to the cover plate, the bottom ends of the plurality of support tubes are fixedly installed with the same flow box, the tops of the two limit frames are fixedly installed on the top inner wall of the flow box, the bottom of the flow box is in contact with the bottom inner wall of the preheating box, a dispersion box connected to the flow box is fixedly sleeved on the flow box, a ventilation mesh is fixedly installed on the top inner wall of the dispersion box, a support ring located below the dispersion box is fixedly installed in the preheating box, the dispersion box is placed on the top of the support ring, a surrounding ring in contact with the inner wall of the preheating box is fixedly installed on the top of the dispersion box, the mounting ring penetrates the top inner wall of the flow box and is fixedly connected to the top inner wall of the flow box, the dispersion mechanism is installed on the flow box, two electric push rods are symmetrically fixedly installed on the top of the base, the output shafts of the two electric push rods extend into the preheating box and are fixedly connected to the bottom of the dispersion box.

[0018] In a possible design, exhaust holes are provided on the bottom inner walls of both sides of the support tube, a fixing ring is fixedly mounted on the support tube, the fixing ring is fixedly installed on the bottom of the cover plate, a support frame is fixedly installed in the support tube, a moving rod is slidably connected through the support frame, a blocking ball is fixedly installed on the top of the moving rod, the blocking ball fits against the inner wall of the support tube, a tension spring is fixedly installed on the bottom end of the moving rod, and the bottom end of the tension spring is fixedly connected to the bottom inner wall of the support tube.

[0019] In a possible design, the dispersion mechanism includes a driving motor fixedly mounted on the top of the cover plate, the output shaft of the driving motor extends into the preheating box and is fixedly mounted with a transmission gear, a support ring is fixedly sleeved on the flow box, a gear ring is rotatably connected to the support ring, the transmission gear is meshed with the gear ring, and a plurality of dispersion blades are fixedly mounted at equal intervals on the bottom of the gear ring, the dispersion blades are used to break up the zinc oxide raw material to make the zinc oxide raw material in a loose state.

[0020] In one possible design, the gas delivery mechanism includes two mounting frames fixedly mounted on the other side of the top of the base, the same isolation box is fixedly mounted on the top of the two mounting frames, a bracket is fixedly mounted inside the isolation box, a filter screen is slidably mounted inside the bracket, one side of the filter screen extends to the outside of the isolation box, an air supply pipe is fixedly mounted on the bottom inner wall of the isolation box, one end of the air supply pipe extends into the regulating box and is fixedly connected to the bottom inner wall of the regulating box, an exhaust assembly located above the filter screen is mounted on the top inner wall of one side of the isolation box, one side of the exhaust assembly extends to the outside of the isolation box and is connected to the top of the base.

[0021] In one possible design, the exhaust assembly includes a mounting tube fixedly mounted on the top inner wall of one side of the isolation box, one end of the mounting tube extends to the outside of the isolation box and is fixedly mounted with a power box, an air connecting pipe is fixedly mounted on the inner wall of one side of the power box, one end of the air connecting pipe extends to the outside of the power box, the air connecting pipe is used to connect with a pipeline for hot air transportation of the rotary kiln, a servo motor is fixedly mounted on the other side of the top of the base, the output shaft of the servo motor extends into the power box and is fixedly mounted with a wind wheel.

[0022] A preheating method, applied in the above-mentioned energy-saving raw material preheating furnace for zinc oxide production, comprises the following steps:

[0023] S1. Raw material placement: Place the zinc oxide raw material that needs to be preheated onto the ventilation mesh plate;

[0024] S2. Movement of dispersion box: Start two electric push rods to drive the dispersion box into the preheating box, set it on the support ring, and ensure that the cover plate is clamped on the top of the preheating box;

[0025] S3, gas pipe connection: connect the gas pipe with the hot gas delivery pipe of the rotary kiln;

[0026] S4, hot air filtering and transportation: start the servo motor to drive the wind wheel to rotate, transport the hot air to the power box, and then transport it to the isolation box through the installation pipe. Use the filter plate to filter dust particles. The filtered hot air is transported to the air pipe, and then transported to the regulating box, and stably transported to the preheating box; the filter plate can be pulled out for cleaning;

[0027] S5. Preheating and ventilation: After the hot air preheats the zinc oxide raw material, it floats upward and is transported to the support tube through the exhaust hole. The air pressure increases to move the baffle ball upward, and the support tube is ventilated. When the baffle ball moves upward, the spring is stretched. When the temperature reaches the required level, the air supply is stopped, and the stretched spring drives the baffle ball to block the support tube.

[0028] S6. Temperature adjustment: Start the adjusting motor to drive the active bevel gear to rotate, mesh with the driven bevel gear to drive the transmission shaft to rotate, and then drive the adjusting screw to rotate, and drive the movable cover to move longitudinally through the nut thread transmission, adjust the connecting area of ​​the first flow hole and the second flow hole, adjust the hot gas flow, and thus adjust the temperature in the preheating box.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0030] Compared with the prior art, the beneficial effect of the present invention is that: in the present invention, by means of the adjustment mechanism, the movable cover can be driven to move longitudinally by starting the lifting assembly, so that the positions of the two first flow holes can be adjusted, so that the connection area between the first flow hole and the second flow hole can be adjusted, so that when the hot air is transported to the preheating mechanism, the flow rate of the hot air can be adjusted, so that the temperature in the preheating box can be adjusted;

[0031] In the present invention, through the preheating mechanism, the hot air flowing out of the two second flow holes can enter the flow box, and then disperse into the dispersion box. After the hot air enters the dispersion box, it can float upward through the ventilation mesh plate, so that the zinc oxide raw material placed on the ventilation mesh plate can be preheated, and the surrounding ring can limit the zinc oxide raw material to prevent the zinc oxide raw material from falling into the preheating box. After the zinc oxide is preheated, the dispersion box can be moved upward by starting the two electric push rods, so that the dispersion box can be moved out of the preheating box, so that the preheated zinc oxide can be conveniently collected;

[0032] In the present invention, the dispersion mechanism is set up, and the driving motor can be started to drive the transmission gear to rotate. At this time, the transmission gear can be driven to rotate, that is, under the meshing transmission action with the gear ring, the gear ring can be rotated, so that the plurality of dispersion blades can be driven to perform annular motion, and the zinc oxide raw material placed on the ventilation mesh plate can be dispersed, so that the zinc oxide raw material is evenly heated;

[0033] In the present invention, through the provided gas delivery mechanism, after the air extraction component is connected to the pipeline for conveying hot gas from the rotary kiln, the air extraction component can be started to convey the hot gas to the isolation box, and the filter screen can be used to filter the dust particles contained in the hot gas, and the filtered hot gas can be conveyed to the gas delivery pipe, and under the conveying action of the gas delivery pipe, the gas is conveyed to the regulating box, so that the hot gas without impurities can be stably conveyed to the preheating box, and the filter screen can be drawn out of the isolation box, so that the dust impurities falling on the filter screen can be cleaned after the filter screen is drawn out.

[0034] The present invention can realize the stable introduction of hot air into the preheating box to preheat the zinc oxide raw material. At the same time, the zinc oxide raw material can be dispersed while being preheated, so that the zinc oxide raw material can be heated quickly and evenly, and the flow rate of the hot air can be adjusted according to actual needs, so that the temperature in the preheating box can be adjusted when the zinc oxide raw material is preheated. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1A three-dimensional schematic diagram of the first-view structure of an energy-saving raw material preheating furnace for zinc oxide production provided by an embodiment of the present invention;

[0036] Figure 2 A three-dimensional schematic diagram of the structure from a second perspective of an energy-saving raw material preheating furnace for zinc oxide production provided by an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of the main cross-sectional structure of an energy-saving raw material preheating furnace for zinc oxide production provided by an embodiment of the present invention;

[0038] Figure 4 A schematic cross-sectional view of the support tube structure of an energy-saving raw material preheating furnace for zinc oxide production provided by an embodiment of the present invention;

[0039] Figure 5 A three-dimensional schematic diagram of the connection structure of the regulating motor, preheating box and dispersion box of the energy-saving raw material preheating furnace for zinc oxide production provided by the embodiment of the present invention;

[0040] Figure 6 A three-dimensional schematic diagram of the connection structure of the cover plate, flow box and dispersion box of the energy-saving raw material preheating furnace for zinc oxide production provided by an embodiment of the present invention;

[0041] Figure 7 A three-dimensional schematic diagram of the cross-sectional structure of a movable cover and an adjusting box of an energy-saving raw material preheating furnace for zinc oxide production provided by an embodiment of the present invention;

[0042] Figure 8 A three-dimensional schematic diagram of the connection structure of the preheating box, the regulating box, the gas pipe and two electric push rods of the energy-saving raw material preheating furnace for zinc oxide production provided by the embodiment of the present invention;

[0043] Fig. 9 A three-dimensional schematic diagram of the cross-sectional structure of an isolation box of an energy-saving raw material preheating furnace for zinc oxide production provided by an embodiment of the present invention.

[0044] Reference numerals:

[0045] 1. Base; 2. Column; 3. Preheating box; 4. Cover plate; 5. Support ring; 6. Support pipe; 61. Fixed ring; 7. Flow box; 8. Dispersion box; 9. Ventilation mesh plate; 10. Limiting frame; 11. Limiting plate; 12. Moving cover; 13. First flow hole; 14. Adjustment box; 15. Second flow hole; 16. Mounting ring; 17. Adjustment screw; 171. Nut; 18. Transmission shaft; 19. Driven bevel gear; 20. Adjustment motor; 21. Active bevel gear Wheel; 22, surrounding ring; 23, driving motor; 24, transmission gear; 25, support ring; 26, gear ring; 27, dispersion blades; 28, exhaust hole; 29, support frame; 30, moving rod; 31, blocking ball; 32, tension spring; 33, air pipe; 34, mounting frame; 35, isolation box; 36, bracket; 37, filter screen; 38, mounting pipe; 39, power box; 40, air pipe; 41, servo motor; 42, wind wheel; 43, electric push rod. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0048] Example 1

[0049] Reference Figure 1-Figure 9 The energy-saving raw material preheating furnace for zinc oxide production of this embodiment comprises a base 1, a plurality of columns 2 are fixedly mounted on one side of the top of the base 1, and a preheating box 3 is fixedly mounted on the top of the columns 2. A cover plate 4 is tightly clamped at the top opening of the preheating box 3.

[0050] In order to adjust the hot gas flow rate, the preheating furnace is provided with an adjusting mechanism. The adjusting mechanism is mainly composed of an adjusting box 14, which penetrates the bottom inner wall of the preheating box 3 and is fixedly connected to the bottom inner wall of the preheating box 3. One end of the gas transmission mechanism extends into the adjusting box 14 and is fixedly connected to the bottom inner wall of the adjusting box 14. In the adjusting box 14, a moving cover 12 is tightly arranged, and the top of the moving cover 12 extends into the preheating mechanism. The first flow holes 13 are provided on the bottom inner walls on both sides of the moving cover 12, and the second flow holes 15 are provided on the top inner walls on both sides of the adjusting box 14, and the first flow holes 13 are connected to the corresponding second flow holes 15.

[0051] In order to drive the movable cover 12 to move longitudinally so as to adjust the communicating area between the first flow hole 13 and the second flow hole 15, thereby adjusting the hot gas flow, a lifting assembly is provided. The lifting assembly comprises a mounting ring 16 mounted on the preheating mechanism, and an adjusting screw 17 is passed through and rotatably connected in the mounting ring 16. A nut 171 is fixedly mounted on the top inner wall of the movable cover 12, and the adjusting screw 17 passes through the top inner wall of the movable cover 12 and the nut 171 respectively and is threadedly connected with the nut 171. A transmission shaft 18 is fixedly mounted on the top of the adjusting screw 17, and the top of the transmission shaft 18 passes through the cover plate 4 and extends to the top of the cover plate 4, and is rotatably connected with the cover plate 4. An adjusting motor 20 is fixedly mounted on the top of the cover plate 4, and an active bevel gear 21 is fixedly mounted on the output shaft of the adjusting motor 20, and a driven bevel gear 19 is fixedly mounted on the top of the transmission shaft 18, and the active bevel gear 21 is meshed with the driven bevel gear 19.

[0052] When the adjustment motor 20 is started, it drives the active bevel gear 21 to rotate, and at this time, under the meshing transmission action with the driven bevel gear 19, it can drive the transmission shaft 18 to rotate. The rotation of the transmission shaft 18 will further drive the adjustment screw 17 to rotate, so that under the threaded transmission action with the nut 171, it can drive the movable cover 12 to move longitudinally, that is, the longitudinal height of the movable cover 12 can be adjusted, so that the communication area of ​​the first flow hole 13 and the second flow hole 15 can be adjusted, and then the temperature in the preheating box 3 can be adjusted.

[0053] In order to ensure the stability of the movable cover 12 when it moves longitudinally, the tops of both sides of the movable cover 12 are fixedly installed with limit plates 11, and the limit frames 10 are slidably connected to the limit plates 11, and the tops of the two limit frames 10 are connected to the preheating mechanism. In this way, the movable cover 12 can be slidably limited by the sliding connection between the limit plates 11 and the limit frames 10, so that when the adjusting screw 17 rotates, the nut 171 can be prevented from rotating with the adjusting screw 17, so as to ensure that when the longitudinal position of the movable cover 12 is adjusted, the transmission can be kept stable.

[0054] The preheating mechanism is installed in the preheating box 3, and the regulating mechanism passes through the preheating mechanism and is connected to the preheating mechanism. The top of the preheating mechanism passes through the cover plate 4 and extends to the top of the cover plate 4. The preheating mechanism is used to disperse the hot air transported to the preheating box 3. The dispersing mechanism is installed on the top of the cover plate 4, and the bottom of the dispersing mechanism extends into the preheating box 3 and is connected to the preheating mechanism, which is used to disperse the zinc oxide raw material so that the zinc oxide raw material can be evenly heated.

[0055] Finally, a gas delivery mechanism is installed on the other side of the top of the base 1, and one end of the gas delivery mechanism is connected to the regulating mechanism for delivering the hot gas exhausted from the rotary kiln.

[0056] The preheating mechanism is the core part of the preheating furnace, which is composed of a plurality of support tubes 6, which all penetrate the cover plate 4 and are fixedly connected to the cover plate 4. A flow box 7 is fixedly installed at the bottom end of the support tubes 6, and the bottom of the flow box 7 is in close contact with the bottom inner wall of the preheating box 3. On the flow box 7, a dispersion box 8 connected to it is fixedly sleeved, and a ventilation mesh plate 9 is fixedly installed on the top inner wall of the dispersion box 8 for placing and preheating the zinc oxide raw material. A support ring 5 located below the dispersion box 8 is also fixedly installed in the preheating box 3, and the dispersion box 8 is placed on the top of the support ring 5. In order to increase the stability of the dispersion box 8, a surrounding ring 22 in contact with the inner wall of the preheating box 3 is also fixedly installed on its top to prevent the zinc oxide raw material from falling out of the dispersion box 8.

[0057] In order to achieve the dispersion and preheating of the hot air flow, the hot air first flows into the flow box 7 from the two second flow holes 15, and then disperses and flows into the dispersion box 8. After the hot air enters the dispersion box 8, it floats upward through the ventilation mesh plate 9 to preheat the zinc oxide raw material placed on the ventilation mesh plate 9. After the preheating is completed, by starting the two electric push rods 43 installed on the top of the base 1, the dispersion box 8 can be pushed to move upward, so as to facilitate the collection of the preheated zinc oxide.

[0058] In the design of the support tube 6, exhaust holes 28 are provided on the inner walls at the bottom of both sides thereof for ventilation during the preheating process. In order to fix the support tube 6, a fixing ring 61 is fixedly sleeved thereon, and the fixing ring 61 is fixedly connected to the bottom of the cover plate 4. A support frame 29 is also fixedly installed in the support tube 6, and a moving rod 30 is slidably connected through the support frame 29. A blocking ball 31 is fixedly installed at the top of the moving rod 30, and the blocking ball 31 fits tightly with the inner wall of the support tube 6. A tension spring 32 is fixedly installed at the bottom end of the moving rod 30, and the bottom end of the tension spring 32 is fixedly connected to the bottom inner wall of the support tube 6.

[0059] During the preheating process, as the hot air in the preheating box 3 preheats the zinc oxide raw material and floats upward, it will enter the support tube 6 through the exhaust hole 28. As the air pressure in the support tube 6 increases, pressure will be generated on the baffle ball 31, causing it to move upward. At this time, the support tube 6 remains in a ventilated state, and the hot air can be discharged to ventilate the preheating box 3. When the temperature in the preheating box 3 reaches the requirement, the air supply to the preheating box 3 is stopped. At this time, the tension spring 32 in a stressed state will drive the moving rod 30 to move downward, causing the baffle ball 31 to block the support tube 6, thereby preventing the gas in the preheating box 3 from leaking and slowing down the rate at which the gas in the preheating box 3 cools down.

[0060] In addition, the preheating furnace is also provided with a dispersion mechanism for breaking up the zinc oxide raw material to make it loose so as to heat it more evenly. The dispersion mechanism includes a drive motor 23 fixedly mounted on the top of the cover plate 4, the output shaft of the drive motor 23 extends into the preheating box 3 and is fixedly mounted with a transmission gear 24. On the flow box 7, a fixed sleeve is provided with a support ring 25, and a gear ring 26 is rotatably connected to the support ring 25, and the transmission gear 24 is meshed with the gear ring 26. A plurality of dispersion blades 27 are fixedly mounted at equal intervals at the bottom of the gear ring 26.

[0061] When the driving motor 23 is started, the transmission gear 24 is driven to rotate, and then the gear ring 26 is driven to rotate. Since the gear ring 26 is meshed with the transmission gear 24, the rotation of the gear ring 26 drives the plurality of dispersion blades 27 to perform circular motion. These dispersion blades 27 break up the zinc oxide raw material placed on the ventilation mesh plate 9, making it in a loose state and more uniform.

[0062] Example 2

[0063] Reference Fig. 9 This embodiment is based on the first embodiment. Regarding the energy-saving raw material preheating furnace for zinc oxide production proposed in the first embodiment, the gas delivery mechanism of the preheating furnace is designed to extract hot air from the rotary kiln and filter it and stably deliver it to the preheating box. This mechanism is mainly composed of a mounting frame 34, an isolation box 35, a bracket 36, a filter screen 37, a gas delivery pipe 33, and a gas extraction component.

[0064] First, two mounting frames 34 are fixedly mounted on the other side of the top of the base 1, and the two mounting frames jointly support the same isolation box 35. Inside the isolation box 35, a bracket 36 is fixedly mounted, and a filter screen plate 37 is slidably arranged inside the bracket 36. One side of the filter screen plate 37 extends to the outside of the isolation box 35, so that the user can easily pull it out and clean it.

[0065] An air delivery pipe 33 is fixedly mounted on the bottom inner wall of the isolation box 35. One end of the air delivery pipe 33 extends into the regulating box 14 and is fixedly connected to the bottom inner wall of the regulating box 14. In this way, the filtered hot air can be transported to the regulating box 14 through the air delivery pipe 33, and then introduced into the preheating box 3.

[0066] An exhaust assembly is installed on the top inner wall of one side of the isolation box 35. The exhaust assembly is located above the filter screen plate 37, and one side of the exhaust assembly extends to the outside of the isolation box 35 and is connected to the top of the base 1. In actual operation, the user can connect the exhaust assembly to the pipeline for hot gas transportation of the rotary kiln.

[0067] The specific structure of the exhaust assembly includes a mounting pipe 38 fixedly mounted on the top inner wall of one side of the isolation box 35. One end of the mounting pipe 38 extends to the outside of the isolation box 35 and is fixedly connected to a power box 39. On the inner wall of one side of the power box 39, an air connection pipe 40 is fixedly mounted, and one end of the air connection pipe 40 extends to the outside of the power box 39 for connecting with the hot air delivery pipeline of the rotary kiln.

[0068] In addition, a servo motor 41 is fixedly installed on the other side of the top of the base 1. The output shaft of the servo motor 41 extends into the power box 39, and a wind wheel 42 is fixedly installed. When the user starts the servo motor 41, the wind wheel 42 will start to rotate. At this time, if the air connection pipe 40 has been connected to the pipeline for hot air transportation of the rotary kiln, the hot air will be sucked into the power box 39 and transported to the isolation box 35 through the installation pipe 38.

[0069] In the isolation box 35, the hot air is filtered by the filter screen 37 to remove dust particles. The filtered hot air is transported to the regulating box 14 through the air pipe 33, and finally introduced into the preheating box 3 to preheat the zinc oxide raw material.

[0070] Since the filter screen plate 37 can be drawn out from the isolation box 35, the user can draw out the filter screen plate 37 when necessary to clean the dust and impurities accumulated thereon to ensure the normal operation and preheating effect of the preheating furnace.

[0071] A preheating method for an energy-saving raw material preheating furnace for zinc oxide production comprises the following steps:

[0072] S1. First, the zinc oxide raw material to be preheated is placed on the ventilation mesh plate 9;

[0073] S2, start the two electric push rods 43 to drive the dispersion box 8 to move into the preheating box 3. When the dispersion box 8 is set on the support ring 5, it can ensure that the cover plate 4 is clamped with the top of the preheating box 3;

[0074] S3, the air connection pipe 40 is connected to the hot air conveying pipeline of the rotary kiln;

[0075] S4. By starting the servo motor 41 to drive the wind wheel 42 to rotate, the hot air can be transported to the power box 39, and then the hot air can be transported to the isolation box 35 through the installation pipe 38, and the dust particles contained in the hot air can be filtered by the filter plate 37. The filtered hot air can be transported to the air pipe 33, and the gas is transported to the regulating box 14 under the transportation action of the air pipe 33, so that the hot air without impurities can be stably transported to the preheating box 3, and the filter plate 37 can be pulled out of the isolation box 35, so that the dust impurities falling on the filter plate 37 can be cleaned after the filter plate 37 is pulled out. After the hot air enters the regulating box 14, it can be transported to the flow box 7 through the two first flow holes 13 and the two second flow holes 15, and then it can be dispersed and flowed into the dispersion box 8. After the hot air enters the dispersion box 8, it can drift upward through the ventilation mesh plate 9, so that the zinc oxide raw material placed on the ventilation mesh plate 9 can be preheated;

[0076] S5. After preheating the zinc oxide raw material, the hot air transported to the preheating box 3 will float upwards, and can be transported to the support tube 6 through the exhaust hole 28. As the air pressure in the support tube 6 increases, pressure will be generated on the blocking ball 31, causing the blocking ball 31 to move upward. The support tube 6 remains ventilated, and the hot air can be discharged to ventilate the preheating box 3. When the blocking ball 31 moves upward, it will drive the moving rod 30 to move upward, so the tension spring 32 will be stretched. When the temperature in the preheating box 3 reaches the requirement, the air supply to the preheating box 3 is stopped, and the tension spring 32 in a stressed state can drive the moving rod 30 to move downward, causing the blocking ball 31 to block the support tube 6, thereby preventing the gas in the preheating box 3 from leaking, thereby slowing down the rate at which the gas in the preheating box 3 cools down.

[0077] S6. The active bevel gear 21 is driven to rotate by starting the adjusting motor 20. At this time, the transmission shaft 18 can be driven to rotate under the meshing transmission action with the driven bevel gear 19. When the transmission shaft 18 rotates, the adjusting screw 17 can be driven to rotate. Therefore, under the threaded transmission action with the nut 171, the movable cover 12 can be driven to move longitudinally, and the longitudinal height of the movable cover 12 can be adjusted, so that the connection area between the first flow hole 13 and the second flow hole 15 can be adjusted, and the flow rate of the hot gas can be adjusted, so that the temperature in the preheating box 3 can be adjusted.

[0078] However, as is well known to those skilled in the art, the working principles and wiring methods of the adjustment motor 20, the drive motor 23 and the servo motor 41 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0079] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention; the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An energy-saving raw material preheating furnace for zinc oxide production, comprising a base (1), a plurality of columns (2) are fixedly mounted on one side of the top of the base (1), a same preheating box (3) is fixedly mounted on the top of the plurality of columns (2), a cover plate (4) is tightly mounted at the top opening of the preheating box (3), and the characteristics are as follows: The preheating furnace also includes: an adjusting mechanism, the adjusting mechanism penetrating the bottom inner wall of the preheating box (3) and being connected to the bottom inner wall of the preheating box (3), the top of the adjusting mechanism extending to the top of the cover plate (4) and being connected to the top of the cover plate (4), the adjusting mechanism being used to adjust the flow rate of hot air delivered to the preheating box (3); A preheating mechanism, the preheating mechanism is installed in the preheating box (3), the regulating mechanism passes through the preheating mechanism and is connected to the preheating mechanism, the top of the preheating mechanism passes through the cover plate (4) and extends to the top of the cover plate (4), and the preheating mechanism is connected, and the preheating mechanism is used to disperse the hot air transported into the preheating box (3); A dispersion mechanism, the dispersion mechanism is installed on the top of the cover plate (4), the bottom of the dispersion mechanism extends into the preheating box (3) and is connected to the preheating mechanism, and the dispersion mechanism is used to disperse the zinc oxide raw material so that the zinc oxide raw material can be evenly heated; A gas delivery mechanism is installed on the other side of the top of the base (1), one end of the gas delivery mechanism is connected to the regulating mechanism, and the gas delivery mechanism is used to deliver hot gas exhausted from the rotary kiln.

2. The energy-saving raw material preheating furnace for zinc oxide production according to claim 1, characterized in that: The regulating mechanism comprises a regulating box (14) penetrating through the bottom inner wall of the preheating box (3) and fixedly connected to the bottom inner wall of the preheating box (3); one end of the gas transmission mechanism extends into the regulating box (14) and is fixedly connected to the bottom inner wall of the regulating box (14); a movable cover (12) is tightly arranged in the regulating box (14); the top of the movable cover (12) extends into the preheating mechanism; first flow holes (13) are provided on the bottom inner walls on both sides of the movable cover (12); and second flow holes (15) are provided on the top inner walls on both sides of the regulating box (14); the first flow holes (13) are connected to the corresponding second flow holes (15); a lifting assembly is installed on the top of the movable cover (12); the top of the lifting assembly respectively penetrates the preheating mechanism and the cover plate (4) and extends to the top of the cover plate (4); the lifting assembly is installed on the top of the cover plate (4).

3. The energy-saving raw material preheating furnace for zinc oxide production according to claim 2, characterized in that: The lifting assembly comprises a mounting ring (16) mounted on the preheating mechanism, an adjusting screw (17) passing through the mounting ring (16) and being rotatably connected, a nut (171) being fixedly mounted on the top inner wall of the movable cover (12), the adjusting screw (17) passing through the top inner wall of the movable cover (12) and the nut (171) respectively and being threadedly connected to the nut (171), a transmission shaft (18) being fixedly mounted on the top end of the adjusting screw (17), the top end of the transmission shaft (18) passing through the cover plate (4) and extending to the top of the cover plate (4), the transmission shaft (18) being rotatably connected to the cover plate (4), an adjusting motor (20) being fixedly mounted on the top end of the cover plate (4), an active bevel gear (21) being fixedly mounted on the output shaft of the adjusting motor (20), a driven bevel gear (19) being fixedly mounted on the top end of the transmission shaft (18), and the active bevel gear (21) being meshed with the driven bevel gear (19).

4. The energy-saving raw material preheating furnace for zinc oxide production according to claim 3, characterized in that: Limiting plates (11) are fixedly mounted on the tops of both sides of the movable cover (12), and limiting frames (10) are slidably connected to the limiting plates (11), and the tops of the two limiting frames (10) are connected to the preheating mechanism.

5. The energy-saving raw material preheating furnace for zinc oxide production according to claim 4, characterized in that: The preheating mechanism comprises a plurality of support tubes (6) which all penetrate the cover plate (4) and are fixedly connected to the cover plate (4); a same flow box (7) is fixedly installed at the bottom ends of the plurality of support tubes (6); the tops of the two limit frames (10) are fixedly installed on the top inner wall of the flow box (7); the bottom of the flow box (7) contacts the bottom inner wall of the preheating box (3); a dispersion box (8) which is connected to the flow box (7) is fixedly sleeved on the flow box (7); a ventilation mesh plate (9) is fixedly installed on the top inner wall of the dispersion box (8); a positioning plate (10) is fixedly installed in the preheating box (3); A support ring (5) is provided below the dispersion box (8), the dispersion box (8) is placed on the top of the support ring (5), a surrounding ring (22) in contact with the inner wall of the preheating box (3) is fixedly installed on the top of the dispersion box (8), a mounting ring (16) passes through the top inner wall of the flow box (7) and is fixedly connected to the top inner wall of the flow box (7), a dispersion mechanism is installed on the flow box (7), two electric push rods (43) are symmetrically fixedly installed on the top of the base (1), the output shafts of the two electric push rods (43) both extend into the preheating box (3) and are fixedly connected to the bottom of the dispersion box (8).

6. The energy-saving raw material preheating furnace for zinc oxide production according to claim 5, characterized in that: The bottom inner walls of both sides of the support tube (6) are provided with exhaust holes (28); a fixed ring (61) is fixedly sleeved on the support tube (6); the fixed ring (61) is fixedly mounted on the bottom of the cover plate (4); a support frame (29) is fixedly mounted inside the support tube (6); a moving rod (30) is slidably connected to the support frame (29); a blocking ball (31) is fixedly mounted on the top of the moving rod (30); the blocking ball (31) is in contact with the inner wall of the support tube (6); a tension spring (32) is fixedly mounted on the bottom end of the moving rod (30); and the bottom end of the tension spring (32) is fixedly connected to the bottom inner wall of the support tube (6).

7. The energy-saving raw material preheating furnace for zinc oxide production according to claim 5, characterized in that: The dispersion mechanism comprises a driving motor (23) fixedly mounted on the top of the cover plate (4); the output shaft of the driving motor (23) extends into the preheating box (3) and is fixedly mounted with a transmission gear (24); a support ring (25) is fixedly sleeved on the flow box (7); a gear ring (26) is rotatably connected to the support ring (25); the transmission gear (24) is meshed with the gear ring (26); a plurality of dispersion blades (27) are fixedly mounted at equal intervals on the bottom of the gear ring (26); the dispersion blades (27) are used to disperse the zinc oxide raw material so that the zinc oxide raw material is in a loose state.

8. The energy-saving raw material preheating furnace for zinc oxide production according to claim 2, characterized in that: The gas delivery mechanism comprises two mounting frames (34) fixedly mounted on the other side of the top of the base (1); the same isolation box (35) is fixedly mounted on the top of the two mounting frames (34); a bracket (36) is fixedly mounted inside the isolation box (35); a filter screen plate (37) is slidably mounted inside the bracket (36); one side of the filter screen plate (37) extends to the outside of the isolation box (35); an air delivery pipe (33) is fixedly mounted on the bottom inner wall of the isolation box (35); one end of the air delivery pipe (33) extends into the regulating box (14) and is fixedly connected to the bottom inner wall of the regulating box (14); an air extraction component located above the filter screen plate (37) is mounted on the top inner wall of one side of the isolation box (35); one side of the air extraction component extends to the outside of the isolation box (35) and is connected to the top of the base (1).

9. The energy-saving raw material preheating furnace for zinc oxide production according to claim 8, characterized in that: The exhaust assembly comprises a mounting pipe (38) fixedly mounted on the top inner wall of one side of the isolation box (35), one end of the mounting pipe (38) extending to the outside of the isolation box (35) and fixedly mounted with a power box (39), an air connection pipe (40) fixedly mounted on the inner wall of one side of the power box (39), one end of the air connection pipe (40) extending to the outside of the power box (39), the air connection pipe (40) being used to be connected with a hot air conveying pipe of the rotary kiln, a servo motor (41) fixedly mounted on the other side of the top of the base (1), the output shaft of the servo motor (41) extending into the power box (39) and fixedly mounted with a wind wheel (42), the wind wheel 42 is driven to rotate by starting the servo motor 41, at this time, after the air connection pipe 40 is connected with the hot air conveying pipe of the rotary kiln, the hot air can be conveyed into the power box 39, and then the hot air can be conveyed into the isolation box 35 through the mounting pipe 38, so as to realize stable conveyance of the hot air.

10. A preheating method, applied to the energy-saving raw material preheating furnace for zinc oxide production as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, raw material placement: placing the zinc oxide raw material to be preheated onto the ventilation mesh plate (9); S2, movement of the dispersion box: start the two electric push rods (43), drive the dispersion box (8) to move into the preheating box (3), set on the support ring (5), and ensure that the cover plate (4) is clamped with the top of the preheating box (3); S3, gas pipe connection: connecting the gas pipe (40) to the hot gas conveying pipeline of the rotary kiln; S4, hot gas filtering and conveying: start the servo motor (41) to drive the wind wheel (42) to rotate, convey the hot gas to the power box (39), and then convey it to the isolation box (35) through the installation pipe (38), use the filter screen (37) to filter dust particles, and convey the filtered hot gas to the air pipe (33), and then convey it to the regulating box (14), and then convey it to the preheating box (3) in a stable manner; the filter screen (37) can be pulled out for cleaning; S5, preheating and ventilation: After the hot air preheats the zinc oxide raw material, it floats upward and is transported to the support pipe (6) through the exhaust hole (28). The air pressure increases, causing the blocking ball (31) to move upward, and the support pipe (6) is ventilated; When the blocking ball (31) moves upward, the spring (32) is stretched, and when the temperature reaches the required level, the gas supply is stopped, and the stretching spring (32) drives the blocking ball (31) to block the support tube (6); S6, temperature adjustment: start the adjustment motor (20) to drive the active bevel gear (21) to rotate, mesh with the driven bevel gear (19) to drive the transmission shaft (18) to rotate, and then drive the adjustment screw (17) to rotate, and drive the movable cover (12) to move longitudinally through the threaded transmission with the nut (171), so as to adjust the connection area between the first flow hole (13) and the second flow hole (15), adjust the hot gas flow, and thus adjust the temperature in the preheating box (3).

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