Tower type combined energy-saving environment-friendly light calcined magnesia shaft kiln

Abstract

The invention relates to the technical field of light calcined magnesia shaft kilns, in particular to a tower-type combined energy-saving and environment-friendly light calcined magnesia shaft kiln which comprises a feeding and distributing device, a plurality of light calcined magnesia shaft kilns and a negative-pressure sealed storehouse, and each light calcined magnesia shaft kiln comprises a feeding port, a preheating zone, a roasting zone, a soaking zone and a cooling zone. The mineral aggregate flows in an S shape inside, and heat carried by roasting waste heat combustion gas is efficiently utilized; then the mineral aggregate falls into a roasting zone, passes through the tower type material distribution cone and is uniformly distributed, meanwhile, the bridge arch is heated by combustion gas, the contact area between the bridge arch and the mineral aggregate is further increased through the arch shape of the bridge arch, and then heat supply to the mineral aggregate is completed, so that the heat supply area of the bridge arch to the mineral aggregate is increased, the mineral aggregate is uniformly distributed through the tower type material distribution cone, accumulation is avoided, and the preheating zone is arranged in an S shape; and therefore, the mineral aggregate flows in an S shape inside, and heat carried by roasting waste heat combustion gas is efficiently utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of light-burned magnesia shaft kilns, and in particular to a tower-type combined energy-saving and environment-friendly light-burned magnesia shaft kiln. Background Art

[0002] Light-burned magnesia (light-burned powder), as an excellent raw material for basic refractory materials, can be made into refractory bricks, ramming mixes, fused magnesia, electrical-grade magnesia, etc., and is widely used as the lining material for high-temperature kilns such as steelmaking, cement, glass, and ceramics. It can also be used as the raw material for magnesium chemical industry and magnesium building materials. Using magnesite as the raw material (particle size between 30 mm and 200 mm), heating it up, magnesite begins to decompose at 750°C and the decomposition is basically completed at 1050°C; the light-burned reverberatory furnace uses coal or coal combustion waste gas to heat and decompose magnesite lumps to obtain light-burned powder; among them, the shaft kiln is widely used in the field of lime calcination. It combines the functions of the light-burned reverberatory furnace and is the most direct and effective kiln for using roasting waste gas to preheat the ore material entering the furnace.

[0003] In the aforementioned prior art, coal gasified gas and natural gas are usually used as fuels, and the shaft kiln is used to roast magnesite lumps, but the utilization rate of heat energy is relatively low, and a large amount of fuel usually needs to be input to meet the roasting requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a tower-type combined energy-saving and environment-friendly light-burned magnesia shaft kiln to solve the problem that in the prior art, coal gasified gas and natural gas are usually used as fuels, and the shaft kiln is used to roast magnesite lumps, but the utilization rate of heat energy is relatively low, and a large amount of fuel usually needs to be input to meet the roasting requirements.

[0005] To achieve the above purpose, the present invention provides a tower-type combined energy-saving and environment-friendly light-burned magnesia shaft kiln, which includes a feeding and distributing device, a plurality of light-burned shaft kilns, and a negative-pressure sealed storage. The feeding and distributing device is arranged on the plurality of light-burned shaft kilns, and the plurality of light-burned shaft kilns are arranged in parallel on one side of the negative-pressure sealed storage;

[0006] The light-burned shaft kiln includes a feeding port, a preheating zone, a roasting zone, a soaking zone, and a cooling zone. The inside of the preheating zone is S-shaped, and both the preheating zone and the roasting zone are rectangular structures. Inside the roasting zone, there are a tower-shaped batching pile and two bridge arches. The two bridge arches are symmetrically distributed inside the roasting zone. The tower-shaped batching pile is arranged above the two bridge arches. The feeding port is communicated with the upper part of the preheating zone, the roasting zone is communicated with the lower part of the preheating zone, the soaking zone is communicated with the lower part of the roasting zone, and the cooling zone is communicated with the lower part of the soaking zone.

[0007] Among them, the feeding and cloth-feeding device includes two enclosed crawler conveyors and an automatic discharging assembly for the soaking zone. The two enclosed crawler conveyors are respectively arranged on one side of the feeding port and below the cooling zone, and the automatic discharging assembly for the soaking zone is arranged at the connection between the cooling zone and the soaking zone.

[0008] Among them, the light burning shaft kiln further includes four burners and a closing unit. The four burners are sequentially arranged below the bridge arch, and the closing unit is arranged below the cooling zone.

[0009] Among them, the automatic discharging assembly for the soaking zone includes a lifting component, a telescopic component, a rotating component, a protective cover, a rotating shaft, a plurality of high-temperature resistant stirring plates, a dust-proof cover, a dust removal pipe and a heat energy recovery pipe. The lifting component is arranged on one side of the soaking zone, the output end of the lifting component is fixedly connected to the telescopic component, the output end of the telescopic component is fixedly connected to the rotating component, the output end of the rotating component is fixedly connected to the rotating shaft, and the plurality of high-temperature resistant stirring plates are sequentially arranged outside the rotating shaft. The dust-proof cover is arranged inside the cooling zone and sleeved outside the telescopic component. The dust removal pipe is communicated with the dust-proof cover, the heat energy recovery pipe is communicated with the cooling zone, and the protective cover is sleeved outside the rotating component and the telescopic component.

[0010] Among them, the closing unit includes a pushing component and a closing plate. The pushing component is arranged below the cooling zone, the output end of the pushing component is fixedly connected to the closing plate, and the closing plate is adapted to the outlet of the soaking zone.

[0011] Among them, the tower-type combined energy-saving and environmental protection light burning magnesia shaft kiln further includes a plurality of dust removal and tail gas treatment assemblies, and the plurality of dust removal and tail gas treatment assemblies are respectively communicated with above the feeding port;

[0012] The dust removal and tail gas treatment assembly includes a treatment box, an exhaust pipe, an air pump, a plurality of exhaust fans, a filter plate, two liquid level sensors, a plurality of water exchange pipes, an inclined plate, a backwashing unit and a washing unit. The treatment box has a first water storage tank, a second water storage tank and a discharge bin. The air pump is arranged on one side of the treatment box, and the air pump is communicated with above the feeding port through the exhaust pipe. The plurality of exhaust fans are sequentially arranged at the connection between the first water storage tank and the second water storage tank. The filter plate is arranged at the connection between the second water storage tank and the discharge bin. The two liquid level sensors are respectively arranged in the first water storage tank and the second water storage tank. The plurality of water exchange pipes are sequentially arranged on both sides of the treatment box. The backwashing unit is arranged in the second water storage tank and the discharge bin. The washing unit is arranged in the second water storage tank. The inclined plate is fixedly connected to the discharge bin and is located on the inner side wall of the discharge bin.

[0013] Among them, the backwashing unit includes a water pump, a water pipe, and a backwashing spray head. The water pump is arranged on the inner bottom wall of the second water tank. One end of the water pipe is communicated with the water outlet end of the water pump, and the other end of the water pipe penetrates through the second water tank and is communicated with the backwashing spray head. The backwashing spray head is located on one side of the filter plate, and the inclined plate is located below the backwashing spray head.

[0014] Among them, the scrubbing unit includes two sliding components, a support plate, a plurality of moving components, and a cleaning brush. The two sliding components are symmetrically arranged inside the second water tank, and the output ends of the two sliding components are fixedly connected to the support plate. The plurality of moving components are sequentially arranged on one side of the support plate, and the output ends of the plurality of moving components penetrate through the support plate and are fixedly connected to the cleaning brush.

[0015] In a tower-type combined energy-saving and environmental-friendly light-burned magnesia vertical kiln of the present invention, through the S-shaped setting of the preheating zone, the ore materials flow in an "S" shape inside, efficiently utilizing the heat carried by the roasting waste heat combustion gas. Then the ore materials fall into the roasting zone area, pass through the tower-shaped feeding cone, evenly distribute the ore materials, and at the same time the combustion gas heats the bridge arch. Through the arch shape of the bridge arch, the contact area with the ore materials is further increased, thereby completing the heat supply to the ore materials. Then the ore materials fall into the soaking zone for soaking, and finally enter the cooling zone for cooling and heat energy recovery. Then the cooling zone is opened, the decomposed ore materials are dispersed and dropped, and then the boiling method is used for cooling. After reaching the discharging and conveying temperature, it is hermetically discharged and conveyed through the feeding and distributing device to avoid dust pollution. Finally, it is placed in the negative-pressure sealed storage warehouse. At the same time, by connecting multiple light-burned vertical kilns in parallel, the production capacity can be greatly improved. Thus, the bridge arch increases the heat supply area for the ore materials, the tower-shaped feeding cone evenly distributes the ore materials to avoid accumulation, and the S-shaped setting of the preheating zone makes the ore materials flow in an "S" shape inside, efficiently utilizing the heat carried by the roasting waste heat combustion gas. Furthermore, with the cooperation of the bridge arch, the tower-shaped feeding pile, and the S-shaped setting, the heat energy utilization efficiency is greatly improved, realizing efficient automated production and greatly increasing the production capacity at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0017] Figure 1 It is a schematic structural diagram of the tower-type combined energy-saving and environmental-friendly light-burned magnesia vertical kiln of the present invention.

[0018] Figure 2 It is a schematic plan view of the parallel connection of the light-burned vertical kilns of the present invention.

[0019] Figure 3 It is a schematic diagram of the opposed firing of the burner of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the parallel connection of the light burning vertical kiln of the present invention.

[0021] Figure 5 It is a cross-sectional view of the light burning vertical kiln of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the tower-shaped distributing pile and the bridge arch of the present invention.

[0023] Figure 7 It is a schematic structural diagram of the automatic discharging component in the soaking zone of the present invention.

[0024] Figure 8 It is a cross-sectional view of the automatic discharging component in the soaking zone of the present invention.

[0025] Figure 9 It is a schematic structural diagram of the interior of the dust-proof cover of the present invention.

[0026] Figure 10 It is a schematic structural diagram of the dust removal tail gas treatment component of the present invention.

[0027] Figure 11 It is a cross-sectional view of the dust removal tail gas treatment component of the present invention.

[0028] Figure 12 It is an internal structure diagram of the treatment box of the present invention.

[0029] 1 - Negative pressure sealed storage, 2 - Feed inlet, 3 - Preheating zone, 4 - Roasting zone, 5 - Soaking zone, 6 - Cooling zone, 7 - Tower-shaped distributing pile, 8 - Bridge arch, 9 - Enclosed crawler conveyor, 10 - Burner, 11 - Lifting component, 12 - Telescopic component, 13 - Rotating component, 14 - Protective cover, 15 - Rotating shaft, 16 - High-temperature stirring plate, 17 - Dust-proof cover, 18 - Dust removal pipe, 19 - Heat energy recovery pipe, 20 - Pushing component, 21 - Sealing plate, 22 - Treatment box, 23 - Exhaust pipe, 24 - Air pump, 25 - Exhaust fan, 26 - Filter plate, 27 - Liquid level sensor, 28 - Water exchange pipe, 29 - Inclined plate, 30 - First water storage tank, 31 - Second water storage tank, 32 - Discharge bin, 33 - Water pump, 34 - Water pipe, 35 - Backwashing nozzle, 36 - Sliding component, 37 - Support plate, 38 - Moving component, 39 - Cleaning brush. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0031] Please refer toFigures 1 to 12 , the present invention provides a tower-type combined energy-saving and environment-friendly light-burned magnesia shaft kiln, which includes a feeding and distributing device, a plurality of light-burning shaft kilns, and a negative-pressure sealed storage room 1. The light-burning shaft kiln includes a feeding port 2, a preheating zone 3, a roasting zone 4, a soaking zone 5, and a cooling zone 6. The inside of the preheating zone 3 is S-shaped. Both the preheating zone 3 and the roasting zone 4 are rectangular structures. Inside the roasting zone 4, there is a tower-type material distribution pile 7 and two bridge arches 8. The two bridge arches 8 are symmetrically distributed inside the roasting zone 4. The tower-type material distribution pile 7 is arranged above the two bridge arches 8. The feeding and distributing device includes two closed crawler conveyors 9 and an automatic discharging assembly for the soaking zone. The light-burning shaft kiln also includes four burners 10 and a closing unit. The automatic discharging assembly for the soaking zone includes a lifting component 11, a telescopic component 12, a rotating component 13, a protective cover 14, a rotating shaft 15, a plurality of high-temperature stirring plates 16, a dust-proof cover 17, a dust removal pipe 18, and a heat energy recovery pipe 19. The closing unit includes a pushing component 20 and a closing plate 21. The tower-type combined energy-saving and environment-friendly light-burned magnesia shaft kiln also includes a plurality of dust removal and tail gas treatment assemblies. The dust removal and tail gas treatment assembly includes a treatment tank 22, an exhaust pipe 23, an air pump 24, a plurality of exhaust fans 25, a filter plate 26, two liquid level sensors 27, a plurality of water replacement pipes 28, an inclined plate 29, a backwashing unit, and a scrubbing unit. The treatment tank 22 has a first water storage tank 30, a second water storage tank 31, and a discharge bin 32. The backwashing unit includes a water pump 33, a water pipe 34, and a backwashing spray head 35. The water pump 33 is arranged on the inner bottom wall of the second water storage tank 31. The scrubbing unit includes two sliding components 36, a support plate 37, a plurality of moving components 38, and a cleaning brush 39.

[0032] Among them, the feeding and cloth-feeding device is arranged on a plurality of the light-burning vertical kilns, and the plurality of light-burning vertical kilns are arranged in parallel on one side of the negative-pressure sealed storage warehouse 1; the inside of the preheating zone 3 is S-shaped, and both the preheating zone 3 and the roasting zone 4 are rectangular structures. Inside the roasting zone 4, a tower-shaped material distribution pile 7 and two bridge arches 8 are arranged. The two bridge arches 8 are symmetrically distributed inside the roasting zone 4, and the tower-shaped material distribution pile 7 is arranged above the two bridge arches 8. The feed inlet 2 communicates with the upper part of the preheating zone 3, the roasting zone 4 communicates with the lower part of the preheating zone 3, the soaking zone 5 communicates with the lower part of the roasting zone 4, and the cooling zone 6 communicates with the lower part of the soaking zone 5. Through the S-shaped setting of the preheating zone 3, the ore material flows in an "S" shape inside, efficiently utilizing the heat carried by the roasting waste heat combustion gas; then the ore material falls into the area of the roasting zone 4, passes through the tower-shaped material distribution cone, and evenly distributes the ore material. At the same time, the combustion gas heats the bridge arches 8, and the arched shape of the bridge arches 8 further increases the contact area with the ore material, thereby completing the heat supply to the ore material. Then the ore material falls into the soaking zone 5 for heat preservation, and finally enters the cooling zone 6 for cooling and heat energy recovery. Then the cooling zone 6 is opened, and the decomposed ore material undergoes decentralized dropping, and then the boiling method is used for cooling. After reaching the discharge conveying temperature, it is hermetically unloaded and conveyed through the feeding and cloth-feeding device to avoid dust pollution, and finally placed in the negative-pressure sealed storage warehouse 1 for storage. At the same time, the parallel connection of a plurality of the light-burning vertical kilns can greatly improve the production capacity.

[0033] Secondly, the two closed crawler conveyors 9 are respectively arranged on one side of the feed inlet 2 and below the cooling zone 6, and the soaking zone automatic unloading assembly is arranged at the connection between the cooling zone 6 and the soaking zone 5. The closed crawler conveyor 9 can convey the ore material in a closed manner to avoid dust polluting the air. The soaking zone automatic unloading assembly can unload the ore material from the soaking zone 5 to avoid blockage.

[0034] At the same time, four burners 10 are sequentially arranged below the bridge arches 8, and the closing unit is arranged below the cooling zone 6. Four burners 10 with opposite openings are used for double-sided fire injection. Above the burners 10, the bridge arches 8 made of refractory materials are used. The burners 10 enter the roasting zone 4 through the bridge arches 8, and the ore material is evenly roasted in the roasting zone 4. With double-sided fire injection, the flames oppose each other to increase the roasting area and improve the roasting efficiency; the closing unit can close the area below the cooling zone 6 and can be opened when unloading is required.

[0035] In addition, the lifting member 11 is disposed on one side of the soaking zone 5. The output end of the lifting member 11 is fixedly connected to the telescopic member 12. The output end of the telescopic member 12 is fixedly connected to the rotating member 13. The output end of the rotating member 13 is fixedly connected to the rotating shaft 15. A plurality of the high-temperature stirring plates 16 are sequentially disposed outside the rotating shaft 15. The dust-proof cover 17 is disposed inside the cooling zone 6 and sleeved outside the telescopic member 12. The dust-removing pipe 18 is communicated with the dust-proof cover 17. The heat energy recovery pipe 19 is communicated with the cooling zone 6. The protective cover 14 is sleeved outside the rotating member 13 and the telescopic member 12. The protective cover 14 can protect the rotating member 13 and the telescopic member 12 to avoid damage caused by falling mineral materials. The lifting member 11 is a cylinder, the telescopic member 12 is a cylinder, and the rotating member 13 is a motor. When the lifting member 11 is started, it drives the rotating member 13 to move downward. Then, the telescopic member 12 drives the rotating member 13 to be located below the outlet of the soaking zone 5. At this time, the lifting member 11 is started again to drive the high-temperature stirring plate 16 into the cooling zone 6. At this time, the rotating member 13 is started to drive the rotating shaft 15 and the high-temperature stirring plate 16 to rotate, stirring the mineral materials to avoid blockage during unloading caused by accumulation at the outlet of the soaking zone 5. At the same time, stirring can also accelerate unloading. The dust-proof cover 17 wraps the entire unloading assembly to avoid dust pollution of the external air. The dust-removing pipe 18 is connected to an external dust-removing device, and thus the dust inside the dust-proof cover 17 can be sucked out and cleaned. The heat energy recovery pipe 19 is communicated with an external heat energy recovery device, and thus the hot air in the cooling zone 6 can be sucked away for heat energy reuse.

[0036] Then, the pushing member 20 is disposed below the cooling zone 6. The output end of the pushing member 20 is fixedly connected to the closing plate 21. The closing plate 21 is adapted to the outlet of the soaking zone 5. When unloading is required, the pushing member 20 is started to drive the closing plate 21 to move and open the outlet of the soaking zone 5.

[0037] Again, multiple dust removal tail gas treatment components are respectively communicated with the upper part of the feed inlet 2; the treatment box 22 has a first water tank 30, a second water tank 31 and a discharge bin 32. The air pump 24 is arranged on one side of the treatment box 22. The air pump 24 is communicated with the upper part of the feed inlet 2 through the exhaust pipe 23. Multiple exhaust fans 25 are sequentially arranged at the connection between the first water tank 30 and the second water tank 31. The filter plate 26 is arranged at the connection between the second water tank 31 and the discharge bin 32. Two liquid level sensors 27 are respectively arranged in the first water tank 30 and the second water tank 31. Multiple water exchange pipes 28 are sequentially arranged on both sides of the treatment box 22. The backwashing unit is arranged in the second water tank 31 and the discharge bin 32. The washing unit is arranged in the second water tank 31. The inclined plate 29 is fixedly connected to the discharge bin 32 and is located on the inner side wall of the discharge bin 32. When roasting, the air pump 24 is started, and the generated tail gas reaches the first water tank 30 through the connection of the feed inlet 2 and the exhaust pipe 23. Then the tail gas is filtered by the cleaning water inside the first water tank 30 to purify and clean the tail gas. At the same time, the exhaust fans 25 are also started, so that the tail gas quickly enters the second water tank 31, and then passes through the filter plate 26 for dust filtration, and finally is discharged through the discharge bin 32. When the filter plate 26 is used for a period of time, the backwashing unit and the washing unit are started to wash the filter plate 26 for repeated use. The water exchange pipes 28 are convenient for replacing the water inside the first water tank 30 and the second water tank 31. The liquid level can be detected by the liquid level sensors 27 to avoid the liquid level being too high when adding water and affecting the operation of equipment such as the exhaust fans 25.

[0038] And, the water pump 33 is arranged on the inner bottom wall of the second water tank 31. One end of the water pipe 34 is communicated with the water outlet end of the water pump 33. The other end of the water pipe 34 penetrates through the second water tank 31 and is communicated with the backwashing spray head 35. The backwashing spray head 35 is located on one side of the filter plate 26. The inclined plate 29 is located below the backwashing spray head 35. The water pump 33 is started to pump the water in the second water tank 31 into the water pipe 34, and it is sprayed on the filter plate 26 through the backwashing spray head 35 to wash the filter plate 26. When the water in the second water tank 31 is used for a period of time, it can be replaced through the water exchange pipes 28. In addition, when the backwashing spray head 35 sprays water, the inclined plate 29 below can prevent the excess water from flowing into the discharge bin 32.

[0039] Finally, the two sliding components 36 are symmetrically arranged inside the second water tank 31. The output ends of the two sliding components 36 are fixedly connected to the support plate 37. A plurality of moving components 38 are sequentially arranged on one side of the support plate 37. The output ends of the plurality of moving components 38 penetrate through the support plate 37 and are fixedly connected to the cleaning brush 39. The moving component 38 is a cylinder, and the sliding component 36 is an electric slide rail. When the sliding component 36 is activated, it drives the support plate 37 to move up and down. At the same time, when the moving component 38 is activated, it drives the cleaning brush 39 to closely adhere to the filter plate 26, thereby washing the filter plate 26. Cooperating with the backwashing spray head 35 can effectively clean the filter plate 26 and enable it to be reused repeatedly.

[0040] When using a tower-type combined energy-saving and environmental-friendly light-burned magnesia vertical kiln of this embodiment, due to the S-shaped setting of the preheating zone 3, the ore materials flow in an "S" shape inside, and then the ore materials fall into the roasting zone 4 area. Through the tower-type distributing cone, the ore materials are evenly distributed. At the same time, the combustion gas heats the bridge arch 8. Through the arch shape of the bridge arch 8, the contact area with the ore materials is further increased, thereby completing the heat supply to the ore materials. Then the ore materials fall into the soaking zone 5 for soaking, and finally enter the cooling zone 6 for cooling and heat energy recovery; then the pushing component 20 is activated to drive the closing plate 21 to move and open the outlet of the soaking zone 5; at this time, the rotating component 13 is activated to drive the rotating shaft 15 and the high-temperature stirring plate 16 to rotate, stirring the ore materials to prevent accumulation at the outlet of the soaking zone 5 and causing blockage during discharging; enabling the decomposed ore materials to fall in a decentralized manner. At the same time, the lower part of the rotating component 13 uses the boiling method for cooling. After reaching the preset discharging and conveying temperature, it is hermetically conveyed through the closed crawler conveyor 9 to avoid dust pollution, and finally placed in the negative-pressure sealed storage warehouse 1 for storage. At the same time, by connecting multiple light-burned vertical kilns in parallel, the production capacity can be greatly improved; thus, the bridge arch 8 increases the heat supply area for the ore materials, the tower-type distributing cone evenly distributes the ore materials to avoid accumulation, and the S-shaped setting of the preheating zone 3 enables the ore materials to flow in an "S" shape inside, efficiently utilizing the heat carried by the roasting waste heat combustion gas; furthermore, with the cooperation of the bridge arch 8, the tower-type distributing pile 7 and the S-shaped setting, the heat energy utilization efficiency is greatly improved, realizing efficient automated production and greatly increasing the production capacity at the same time.

[0041] What is disclosed above is only one or more preferred embodiments of the present application, and it cannot be used to limit the scope of rights of the present application. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A tower-type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln, characterized in that: It comprises a feeding and distributing device, a plurality of light-fired vertical kilns and a negative pressure sealed storehouse, wherein the feeding and distributing device is arranged on the plurality of light-fired vertical kilns, and the plurality of light-fired vertical kilns are arranged in parallel on one side of the negative pressure sealed storehouse; The light-fired vertical kiln includes a feed inlet, a preheating zone, a roasting zone, a soaking zone and a cooling zone. The interior of the preheating zone is S-shaped. The preheating zone and the roasting zone are both rectangular structures. A tower-type material distribution pile and two bridge arches are arranged inside the roasting zone. The two bridge arches are symmetrically distributed inside the roasting zone. The tower-type material distribution pile is arranged above the two bridge arches. The feed inlet is connected to the top of the preheating zone, the roasting zone is connected to the bottom of the preheating zone, the soaking zone is connected to the bottom of the roasting zone, and the cooling zone is connected to the bottom of the soaking zone.

2. The tower type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln according to claim 1, characterized in that: The feeding and distributing device includes two closed crawler conveyors and a soaking zone automatic unloading assembly. The two closed crawler conveyors are respectively arranged on one side of the feed port and below the cooling belt. The soaking zone automatic unloading assembly is arranged at the connection point between the cooling belt and the soaking zone.

3. The tower type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln as claimed in claim 2, characterized in that: The light-fired vertical kiln further comprises four burners and a closing unit. The four burners are sequentially arranged below the bridge arch, and the closing unit is arranged below the cooling belt.

4. The tower type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln as claimed in claim 3, characterized in that: The automatic unloading assembly of the soaking zone includes a lifting component, a telescopic component, a rotating component, a protective cover, a rotating shaft, a plurality of high-temperature resistant stirring plates, a dust cover, a dust removal pipe and a heat recovery pipe. The lifting component is arranged on one side of the soaking zone, the output end of the lifting component is fixedly connected to the telescopic component, the output end of the telescopic component is fixedly connected to the rotating component, the output end of the rotating component is fixedly connected to the rotating shaft, the plurality of high-temperature resistant stirring plates are sequentially arranged on the outside of the rotating shaft, the dust cover is arranged on the inside of the cooling zone and is sleeved on the outside of the telescopic component, the dust removal pipe is connected to the dust cover, the heat recovery pipe is connected to the cooling zone, and the protective cover is sleeved on the outside of the rotating component and the telescopic component.

5. The tower type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln as claimed in claim 4, characterized in that: The closing unit comprises a pushing component and a closing plate. The pushing component is arranged below the cooling belt. The output end of the pushing component is fixedly connected to the closing plate. The closing plate and the outlet of the soaking belt are adapted to each other.

6. The tower type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln as claimed in claim 5, characterized in that: The tower-type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln also includes a plurality of dust removal tail gas treatment components, and the plurality of dust removal tail gas treatment components are connected to the upper part of the feed inlet of the winning furnace respectively; The dust removal exhaust gas treatment component includes a treatment box, an exhaust pipe, an air pump, multiple exhaust fans, a filter plate, two liquid level sensors, multiple water exchange pipes, an inclined plate, a backwash unit and a scrubbing unit. The treatment box has a first water tank, a second water tank and a discharge tank. The air pump is arranged on one side of the treatment box. The air pump is connected to the top of the feed port through the exhaust pipe. The multiple exhaust fans are sequentially arranged at the connection between the first water tank and the second water tank. The filter plate is arranged at the connection between the second water tank and the discharge tank. The two liquid level sensors are respectively arranged in the first water tank and the second water tank. The multiple water exchange pipes are sequentially arranged on both sides of the treatment box. The backwash unit is arranged in the second water tank and the discharge tank. The scrubbing unit is arranged in the second water tank. The inclined plate is fixedly connected to the discharge tank and is located on the inner wall of the discharge tank.

7. The tower type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln according to claim 6, characterized in that: The backwash unit includes a water pump, a water pipe and a backwash nozzle. The water pump is arranged on the inner bottom wall of the second water tank. One end of the water pipe is connected with the water outlet end of the water pump. The other end of the water pipe passes through the second water tank and is connected with the backwash nozzle. The backwash nozzle is located on one side of the filter plate, and the inclined plate is located below the backwash nozzle.

8. The tower type combined energy-saving and environment-friendly light-burned magnesium oxide vertical kiln according to claim 7, characterized in that: The scrubbing unit includes two sliding components, a support plate, multiple moving components and a cleaning brush. The two sliding components are symmetrically arranged inside the second water tank. The output ends of the two sliding components are fixedly connected to the support plate. The multiple moving components are sequentially arranged on one side of the support plate. The output ends of the multiple moving components pass through the support plate and are fixedly connected to the cleaning brush.

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