A fluidized bed furnace having a slag auxiliary discharge structure for sulfuric acid production

Abstract

The present application relates to the technical field of fluidized bed furnace, in particular to a fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation, which comprises a collecting mechanism and a discharge mechanism, the discharge mechanism is arranged on the surface of the collecting mechanism, the collecting mechanism comprises a gas supply assembly, a slag discharge assembly, a concentrating assembly and a flow guide assembly, the slag discharge assembly is arranged on the right side of the gas supply assembly, the concentrating assembly is arranged on the top of the slag discharge assembly, and the flow guide assembly is arranged on the inner side of the concentrating assembly, the discharge mechanism comprises a guide assembly, a conveying assembly, a cooling assembly, a discharge assembly and a preheating assembly, and the guide assembly is arranged on the bottom of the inner side of the concentrating assembly, the fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation has the structure of discharging and utilizing the slag after the raw material processing, so that the slag generated after the processing can be discharged and utilized, and the flexibility of the slag recovery after the raw material processing is improved.

Description

Technical Field

[0001] This invention relates to the field of fluidized bed furnace technology, specifically to a fluidized bed furnace for sulfuric acid preparation with an auxiliary slag discharge structure. Background Technology

[0002] In the contact process for sulfuric acid production, the roasting of sulfur-containing raw materials such as pyrite is a key step in the preparation of sulfur dioxide feed gas, and the fluidized bed furnace is the core reaction equipment widely used in the roasting section of the current sulfuric acid industry.

[0003] In the preparation of sulfuric acid, the raw materials are put into a fluidized bed furnace for processing. The problem with the existing technology is that, due to the lack of a structure for discharging and utilizing the slag after the raw materials are processed, it is impossible to discharge and utilize the slag generated after processing, which reduces the flexibility of slag recycling after raw material processing. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a fluidized bed furnace for sulfuric acid preparation with a slag-assisted discharge structure. This furnace has a structure that discharges and utilizes the slag after raw material processing, thus improving the flexibility of slag recovery after raw material processing.

[0005] (II) Technical Solution The above-mentioned technical objective of the present invention is achieved through the following technical solution: a fluidized bed furnace for sulfuric acid preparation with a slag auxiliary discharge structure, comprising a collection mechanism and a discharge mechanism, wherein the discharge mechanism is disposed on the surface of the collection mechanism, the collection mechanism comprising a gas supply component, a slag discharge component, a concentrating component and a flow guiding component, the slag discharge component being disposed on the right side of the gas supply component, the concentrating component being disposed on the top of the slag discharge component, the flow guiding component being disposed inside the concentrating component, the discharge mechanism comprising a guiding component, a conveying component, a cooling component, a discharge component and a preheating component, the guiding component being disposed at the bottom inside the concentrating component, the conveying component being disposed on the right side of the guiding component, the cooling component being disposed on the top of the conveying component, the discharge component being disposed at the bottom of the cooling component, and the preheating component being disposed on the left side of the discharge component.

[0006] By adopting the above technical solution, a collection mechanism and a discharge mechanism are set up. The collection mechanism is a structure that provides a preparation environment for sulfuric acid preparation raw materials. At the same time, the discharge mechanism can be used to preheat the incoming air, thereby improving the stability of air transportation. The discharge mechanism can discharge the slag produced after the preparation is completed, and at the same time, it can cool the slag and recover the waste heat generated during cooling and use it to preheat the air transported in the collection mechanism.

[0007] The present invention is further configured such that: the air supply assembly includes a fixed base, a blower and an air supply pipe, the blower is bolted to the left side of the fixed base, and the air supply pipe is connected to the output end of the blower.

[0008] By adopting the above technical solution, by setting up an air supply component, a fixed base, and an air conveying structure composed of a blower and an air supply pipe, outside air can be delivered into the centralized component, thereby providing it with flowing air to blow the raw materials to make them boil. The fixed base provides support for the blower, allowing the blower to blow outside air into the air supply pipe, which in turn delivers the airflow to the slag discharge component.

[0009] The present invention is further configured such that: the slag discharge assembly includes a guide pipe, a discharge pipe and an electric auger, the guide pipe is connected to the right side of the air supply pipe, the discharge pipe is connected to the bottom of the guide pipe, and the electric auger is bolted to the right side of the guide pipe.

[0010] By adopting the above technical solution, by setting up a slag discharge component, an air guiding structure consisting of a guide pipe, a discharge pipe, and an electric auger, the air delivered by the blower can be transported to the centralized component, and the falling impurities can be recovered. The air delivered by the air supply pipe through the guide pipe is sent to the centralized component, and the electric auger can transport the impurities in the guide pipe to the discharge pipe, so that they can be discharged through the discharge pipe.

[0011] The present invention is further configured such that: the centralized assembly includes a boiling furnace, a guide box, and a funnel mesh, the boiling furnace is connected to the top of the guide tube, the guide box is connected to the left side of the boiling furnace, and the funnel mesh is bolted to the top of the inner side of the boiling furnace.

[0012] By adopting the above technical solution, the raw material interception structure composed of a centralized component, a fluidized bed furnace, a guide box, and a funnel mesh can temporarily intercept the raw material and provide a fluidizing environment for raw material preparation. The guide box feeds the raw material into the fluidized bed furnace, which is a device in the prior art used for fluidizing raw materials for sulfuric acid preparation. The funnel mesh can intercept the slag after preparation and centrally transport it into the guide component.

[0013] The present invention is further configured such that: the flow guiding assembly includes an air guiding funnel pipe, an air guiding plate, and a flow dividing plate; the air guiding funnel pipe is connected to the bottom of the inner side of the fluidized bed furnace; the air guiding plate is bolted to the top of the inner side of the air guiding funnel pipe; the flow dividing plate is bolted to the bottom of the air guiding plate; and the flow dividing plate is configured as an arc surface.

[0014] By adopting the above technical solution, by setting up the air guiding component, the air guiding funnel pipe, the air guiding plate and the flow dividing plate form an air guiding structure, which can concentrate and guide the flowing air to the funnel screen, so that the air can flow evenly to the raw material, thereby allowing the raw material to be boiled. The air guiding funnel pipe guides the air from the discharge pipe upward, and the air guiding funnel pipe can guide the airflow through its own grid-like guide. The flow dividing plate can further concentrate and guide the air to the air guiding plate.

[0015] The present invention is further configured such that: the guiding component includes a conveying pipe, a mesh pipe, and a discharge pipe, the conveying pipe is connected to the bottom of the funnel mesh, the mesh pipe is connected to the right side of the conveying pipe, the discharge pipe is connected to the right side of the mesh pipe, and the right side of the discharge pipe passes through the right side of the fluidized bed furnace and is connected to the fluidized bed furnace.

[0016] By adopting the above technical solution, the slag guiding structure composed of the guiding component, the conveying pipe, the network pipe and the discharge pipe can guide the slag to the discharge component, deliver the slag to the network pipe through the conveying pipe, and finally deliver the slag to the discharge component through the conveying component.

[0017] The present invention is further configured such that: the conveying assembly includes a feeding pipe, a servo motor and a spiral plate, the feeding pipe is connected to the right side of the discharge pipe, the servo motor is bolted to the right side of the feeding pipe, the spiral plate is bolted to the output end of the servo motor, the surface of the spiral plate is in contact with the inner side of the feeding pipe, the left side of the surface of the spiral plate is in contact with the inner side of the mesh pipe, and the left side of the surface of the spiral plate is in contact with the bottom of the inner side of the conveying pipe.

[0018] By adopting the above technical solution, a conveying component is set up. The feeding pipe, servo motor and spiral plate form a structure to convey the slag in the conveying pipe to the discharge component. The slag can be continuously conveyed to the discharge component. The servo motor drives the spiral plate to rotate, so that the spiral plate can send the slag in the conveying pipe into the feeding pipe when it rotates, and then send it into the discharge component through the feeding pipe. At the same time, the feeding pipe itself can connect the cooling component and the discharge component, so that the air conveyed by the cooling component can be conveyed to the slag in the discharge component.

[0019] The present invention is further configured such that: the cooling assembly includes a conveying square tube, a guide tube, and an electric fan, wherein the conveying square tube is connected to the top of the feeding pipe, the guide tube is connected to the top of the conveying square tube, and the electric fan is connected to the top of the guide tube.

[0020] By adopting the above technical solution, a cooling air conveying structure consisting of a cooling component, a conveying square tube, a guide pipe, and an electric fan can be set up to transport outside air to the discharge component, thereby cooling the slag and facilitating its subsequent recycling. The electric fan blows outside air into the guide pipe, allowing the air to flow through the guide pipe to the discharge component, thereby cooling the slag.

[0021] The present invention is further configured such that: the discharge assembly includes a discharge square tube, a guide grille and a discharge valve, the discharge square tube is connected to the bottom of the conveying square tube, the top of the discharge square tube passes through the bottom of the feeding pipe and is connected to the bottom of the feeding pipe, the guide grille is bolted to the inner side of the discharge square tube, and the discharge valve is connected to the right side of the discharge square tube.

[0022] By adopting the above technical solution, the slag conveying and discharging structure, consisting of a discharge component, a discharge square pipe, a guide grid, and a discharge valve, can temporarily store slag. When the slag is recycled by external slag recycling equipment, it can be transported to it. Through the temporary slag storage structure composed of the discharge square pipe and the guide grid, the guide grid can temporarily store the slag falling into the discharge square pipe. Through its own inclined structure, the slag is guided to the discharge valve. Furthermore, the grid structure allows air to pass through. After the air carries away the heat from the slag, it can be directly transported to the preheating component.

[0023] The present invention is further configured such that: the preheating component includes a return square tube, a heat-conducting plate and a return pipe, the return square tube is connected to the bottom of the discharge square tube, the heat-conducting plate is bolted to the bottom of the return square tube, the return pipe is connected to the bottom of the return square tube, the inner side of the return pipe is in contact with the surface of the heat-conducting plate, and the left side of the return pipe is connected to the right side of the guide pipe.

[0024] By adopting the above technical solution, and by setting up a preheating component, the heat recovery structure composed of the return square tube, the heat conduction plate, and the return pipe can recover the heat flow after cooling the slag into the guide pipe, thereby preheating the air in it. The hot air is then transported to the return pipe through the return square tube, and then to the guide pipe. The heat conduction plate can absorb and store the heat, maintaining the heat in the return pipe and increasing the stability of waste heat recovery.

[0025] (III) Beneficial Effects Compared with the prior art, the present invention provides a fluidized bed furnace with a slag auxiliary discharge structure for sulfuric acid preparation, which has the following beneficial effects: This fluidized bed furnace for sulfuric acid preparation, featuring a slag-assisted discharge structure, utilizes a collection mechanism. The air supply component, along with the slag discharge component, concentrating component, and flow guiding component, forms a structure that provides a preparation environment for the sulfuric acid raw materials. Simultaneously, the discharge mechanism preheats the incoming air, improving the stability of air delivery. An air delivery structure, consisting of a fixed base, blower, and air supply pipe, delivers outside air to the concentrating component, providing flowing air to agitate the raw materials and induce boiling. An air guiding structure, consisting of a guide pipe, discharge pipe, and electric auger, directs air from the blower to the concentrating component and recovers fallen impurities. A raw material interception structure, consisting of the fluidized bed furnace, guide box, and funnel mesh, temporarily intercepts the raw materials while providing a boiling environment. An air guiding structure, consisting of a guide funnel pipe, guide plate, and flow divider, concentrates and guides the flowing air to the funnel mesh, ensuring uniform airflow to the raw materials for boiling treatment. This fluidized bed furnace for sulfuric acid preparation features a slag-assisted discharge structure. The slag discharge structure, comprised of a guide component, conveying component, cooling component, discharge component, and preheating component, discharges the slag produced during the preparation process. Simultaneously, it cools the slag and recovers the waste heat generated during cooling, using it to preheat the air transported within the collection mechanism. The slag guide structure, consisting of a conveying pipe, a mesh pipe, and a discharge pipe, guides the slag towards the discharge component. A feeding pipe, servo motor, and spiral plate form a structure that transports the slag from the conveying pipe to the discharge component. The slag is continuously conveyed to the discharge assembly. A cooling air conveying structure consisting of a conveying square tube, a guide pipe, and an electric fan can transport outside air to the discharge assembly, thereby cooling the slag and facilitating its subsequent recycling. A slag conveying and discharging structure consisting of a discharge square tube, a guide grid, and a discharge valve can temporarily store the slag and transport it to external slag recycling equipment. A heat flow recovery structure consisting of a return square tube, a heat-conducting plate, and a return pipe can recover the heat from the cooled slag into the guide pipe, thereby preheating the air therein. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the collecting mechanism in this invention; Figure 3 This is a schematic diagram of the structure of the slag discharge component in this invention; Figure 4 This is a schematic diagram of the structure of the central component and the flow guiding component in this invention; Figure 5 This is a schematic diagram of the emission mechanism in this invention; Figure 6 This is a schematic diagram of the structure of the guiding component, conveying component, and cooling component in this invention; Figure 7 This is a schematic diagram of the structure of the emission component and the preheating component in this invention.

[0027] In the diagram: 1. Collection mechanism; 11. Gas supply assembly; 111. Fixed base; 112. Blower; 113. Air supply duct; 12. Ash discharge assembly; 121. Guide pipe; 122. Discharge pipe; 123. Electric auger; 13. Centralization assembly; 131. Fluidized bed furnace; 132. Guide box; 133. Funnel screen; 14. Flow guiding assembly; 141. Air guide funnel pipe; 142. Air guide plate; 143. Diversion grid plate; 2. Discharge mechanism; 21. Guide assembly Components; 211, conveying pipe; 212, mesh pipe; 213, discharge pipe; 22, conveying assembly; 221, feeding pipe; 222, servo motor; 223, spiral plate; 23, cooling assembly; 231, conveying square tube; 232, guide pipe; 233, electric fan; 24, discharge assembly; 241, discharge square tube; 242, guide grid; 243, discharge valve; 25, preheating assembly; 251, return square tube; 252, heat conduction plate; 253, return pipe. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1 Please see Figure 1-4A fluidized bed furnace for sulfuric acid preparation with an auxiliary slag discharge structure includes a collection mechanism 1. The collection mechanism 1 includes an air supply component 11, a slag discharge component 12, a concentrating component 13, and a flow guiding component 14. The slag discharge component 12 is located to the right of the air supply component 11, the concentrating component 13 is located on top of the slag discharge component 12, and the flow guiding component 14 is located inside the concentrating component 13. By setting up the collection mechanism 1, the air supply component 11, together with the slag discharge component 12, the concentrating component 13, and the flow guiding component 14, can form a structure that provides a preparation environment for the raw materials of sulfuric acid preparation. At the same time, the discharge mechanism 2 can be used to preheat the supplied air, improving the stability of air delivery. Through the air delivery structure formed by the fixed base 111, the blower 112, and the air supply pipe 113, the external air can be discharged. Air is delivered into the central assembly 13, providing it with flowing air to agitate and boil the raw materials. The air guiding structure, consisting of the guide pipe 121, the discharge pipe 122, and the electric auger 123, can deliver the air delivered by the blower 112 to the central assembly 13, while also recovering any falling impurities. The raw material interception structure, consisting of the boiling furnace 131, the guide box 132, and the funnel mesh 133, can temporarily intercept the raw materials and provide a boiling environment for the raw material preparation. The air guiding structure, consisting of the air guide funnel pipe 141, the air guide plate 142, and the flow divider plate 143, can concentrate and guide the flowing air to the funnel mesh 133, allowing the air to flow evenly to the raw materials, thereby boiling the raw materials.

[0030] The air supply assembly 11 includes a fixed base 111, a blower 112, and an air supply pipe 113. The blower 112 is bolted to the left side of the fixed base 111, and the air supply pipe 113 is connected to the output end of the blower 112. By setting up the air supply assembly 11, the air conveying structure formed by the fixed base 111, the blower 112, and the air supply pipe 113 can deliver outside air into the centralized assembly 13, thereby providing it with flowing air to blow the raw materials to make them boil. The fixed base 111 provides support for the blower 112, allowing the blower 112 to blow outside air into the air supply pipe 113, thereby allowing the air supply pipe 113 to deliver the airflow to the slag discharge assembly 12.

[0031] The slag discharge assembly 12 includes a guide pipe 121, a discharge pipe 122, and an electric auger 123. The guide pipe 121 is connected to the right side of the air supply pipe 113, the discharge pipe 122 is connected to the bottom of the guide pipe 121, and the electric auger 123 is bolted to the right side of the guide pipe 121. By setting up the slag discharge assembly 12, the air guiding structure composed of the guide pipe 121, the discharge pipe 122, and the electric auger 123 can transport the air delivered by the blower 112 to the concentrating assembly 13, and at the same time, it can recover the fallen impurities. The air delivered by the air supply pipe 113 is sent to the concentrating assembly 13 through the guide pipe 121, and the electric auger 123 can transport the impurities in the guide pipe 121 to the discharge pipe 122, so that they can be discharged through the discharge pipe 122.

[0032] The centralized component 13 includes a fluidized bed furnace 131, a guide box 132, and a funnel mesh 133. The fluidized bed furnace 131 is connected to the top of the guide pipe 121, the guide box 132 is connected to the left side of the fluidized bed furnace 131, and the funnel mesh 133 is bolted to the top of the inner side of the fluidized bed furnace 131. By setting up the centralized component 13, the raw material interception structure formed by the fluidized bed furnace 131, the guide box 132, and the funnel mesh 133 can temporarily intercept the raw material and provide a boiling environment for raw material preparation. The raw material is fed into the fluidized bed furnace 131 through the guide box 132. The fluidized bed furnace 131 is a device in the prior art for boiling treatment of sulfuric acid preparation raw materials and can prepare sulfuric acid raw materials. The funnel mesh 133 can intercept the slag after preparation and centrally transport it into the guide component 21.

[0033] The flow guiding component 14 includes an air guide funnel pipe 141, a guide plate 142, and a flow divider 143. The air guide funnel pipe 141 is connected to the bottom of the inner side of the fluidized bed furnace 131. The guide plate 142 is bolted to the top of the inner side of the air guide funnel pipe 141. The flow divider 143 is bolted to the bottom of the guide plate 142. The flow divider 143 is designed with an arc surface. By setting the flow guiding component 14, the air guide funnel pipe 141, the guide plate 142, and the flow divider 143 form an air guiding structure, which can concentrate and guide the flowing air to the funnel mesh 133, so that the air flows evenly to the raw material, thereby allowing the raw material to be fluidized. The air guide funnel pipe 141 guides the air from the discharge pipe 122 upward. The air guide funnel pipe 141 can guide the airflow through its own grid-like guide. The flow divider 143 can further concentrate and guide the air to the guide plate 142.

[0034] The working principle of this embodiment is as follows: First, the raw material conveying end for sulfuric acid preparation is placed at the guide box 132, and then the raw material falls into the fluidized bed furnace 131. Then, the blower 112 is started, and the blower 112 sends outside air into the air supply pipe 113. After passing through the air supply pipe 113 and the guide pipe 121, the air is sent to the air guide funnel pipe 141. Then, the air flows through the diversion grid plate 143 into the air guide plate 142. The airflow guided by the air guide plate 142 is sent upward to the funnel mesh 133, and the raw material will tumble with the airflow. Then, the igniter of the fluidized bed furnace 131 is started, and the raw material will begin to boil, thus starting the preparation of sulfuric acid. After the preparation is completed, the slag will fall into the discharge mechanism 2 after the blower 112 reduces its power. The fine impurities of the slag will fall into the guide pipe 121, and then the electric auger 123 will send the impurities in the guide pipe 121 to the discharge pipe 122, and then the impurities falling into the discharge pipe 122 will be recovered.

[0035] Example 2 refer to Figure 5-7 A fluidized bed furnace for sulfuric acid preparation with a slag auxiliary discharge structure further includes a discharge mechanism 2. The discharge mechanism 2 includes a guiding component 21, a conveying component 22, a cooling component 23, a discharge component 24, and a preheating component 25. The guiding component 21 is located at the bottom inside the concentrating component 13, the conveying component 22 is located to the right of the guiding component 21, the cooling component 23 is located at the top of the conveying component 22, and the discharge component 24 is located at the bottom of the cooling component 23. The preheating component 25 is located to the left of the discharge component 24. By setting the discharge mechanism 2, the guiding component 21, together with the conveying component 22, cooling component 23, discharge component 24, and preheating component 25, can form a slag discharge structure that can discharge the slag produced during the preparation process, cool the slag, and recover the waste heat generated during cooling for preheating the air transported in the collection mechanism 1. The discharge mechanism 25 is connected to the network pipe 212 and... The slag guiding structure composed of the discharge pipe 213 can guide the slag to the discharge assembly 24. The structure composed of the feeding pipe 221, servo motor 222 and spiral plate 223 can continuously transport the slag in the conveying pipe 211 to the discharge assembly 24. The cooling air conveying structure composed of the conveying square pipe 231, guide pipe 232 and electric fan 233 can transport the outside air to the discharge assembly 24 to cool the slag and facilitate the subsequent recycling of the slag. The slag conveying and discharging structure composed of the discharge square pipe 241, guide grid 242 and discharge valve 243 can temporarily store the slag and transport it to the external slag recycling equipment. The heat flow recovery structure composed of the return square pipe 251, heat conduction plate 252 and return pipe 253 can recover the heat flow after cooling the slag into the guide pipe 121, thereby preheating the air therein.

[0036] The guiding component 21 includes a conveying pipe 211, a mesh pipe 212, and a discharge pipe 213. The conveying pipe 211 is connected to the bottom of the funnel mesh 133, the mesh pipe 212 is connected to the right side of the conveying pipe 211, and the discharge pipe 213 is connected to the right side of the mesh pipe 212. The right side of the discharge pipe 213 passes through the right side of the fluidized bed furnace 131 and is connected to the fluidized bed furnace 131. By setting the guiding component 21, the slag guiding structure composed of the conveying pipe 211, the mesh pipe 212, and the discharge pipe 213 can guide the slag to the discharge component 24. The slag is sent to the mesh pipe 212 through the conveying pipe 211, and then sent to the discharge pipe 213 through the conveying component 22, and finally to the discharge component 24.

[0037] The conveying assembly 22 includes a feeding pipe 221, a servo motor 222, and a spiral plate 223. The feeding pipe 221 is connected to the right side of the discharge pipe 213. The servo motor 222 is bolted to the right side of the feeding pipe 221. The spiral plate 223 is bolted to the output end of the servo motor 222. The surface of the spiral plate 223 contacts the inner side of the feeding pipe 221, the left side of the surface of the spiral plate 223 contacts the inner side of the mesh pipe 212, and the left side of the surface of the spiral plate 223 contacts the bottom of the inner side of the conveying pipe 211. By setting the conveying assembly 22, the feeding pipe 221 and the servo motor 222 are connected. The motor 222 and the spiral plate 223 form a structure that conveys the slag in the conveying pipe 211 to the discharge assembly 24. The slag can be continuously conveyed to the discharge assembly 24. The servo motor 222 drives the spiral plate 223 to rotate, so that the spiral plate 223 can send the slag in the conveying pipe 211 to the feeding pipe 221 when it rotates, and then send it to the discharge assembly 24 through the feeding pipe 221. At the same time, the feeding pipe 221 itself can connect the cooling assembly 23 and the discharge assembly 24, so that the air conveyed by the cooling assembly 23 can be conveyed to the slag in the discharge assembly 24.

[0038] The cooling assembly 23 includes a conveying square tube 231, a guide pipe 232, and an electric fan 233. The conveying square tube 231 is connected to the top of the feeding pipe 221, the guide pipe 232 is connected to the top of the conveying square tube 231, and the electric fan 233 is connected to the top of the guide pipe 232. By setting up the cooling assembly 23, the cooling air conveying structure composed of the conveying square tube 231, the guide pipe 232, and the electric fan 233 can convey outside air to the discharge assembly 24, thereby cooling the slag and facilitating its subsequent recycling. The electric fan 233 blows outside air into the guide pipe 232, allowing the air to flow through the guide pipe 232 to the discharge assembly 24, thereby cooling the slag.

[0039] The discharge assembly 24 includes a discharge square pipe 241, a guide grille 242, and a discharge valve 243. The discharge square pipe 241 is connected to the bottom of the conveying square pipe 231, and the top of the discharge square pipe 241 passes through the bottom of the feeding pipe 221 and is connected to the bottom of the feeding pipe 221. The guide grille 242 is bolted to the inside of the discharge square pipe 241, and the discharge valve 243 is connected to the right side of the discharge square pipe 241. By setting the discharge assembly 24, the discharge square pipe 241, the guide grille 242, and the discharge valve 243 form a complete system. The slag conveying and discharging structure can temporarily store slag and transport it to external slag recycling equipment. The temporary slag storage structure, consisting of discharge square pipe 241 and guide grid 242, allows the guide grid 242 to temporarily store the slag falling into the discharge square pipe 241. Through its own inclined structure, the slag is guided to the discharge valve 243. The grid structure also allows air to pass through, and after the air carries away the heat from the slag, it can be directly transported to the preheating component 25.

[0040] The preheating assembly 25 includes a return square tube 251, a heat-conducting plate 252, and a return pipe 253. The return square tube 251 is connected to the bottom of the discharge square tube 241. The heat-conducting plate 252 is bolted to the bottom of the return square tube 251. The return pipe 253 is connected to the bottom of the return square tube 251. The inner side of the return pipe 253 is in contact with the surface of the heat-conducting plate 252. The left side of the return pipe 253 is connected to the right side of the guide pipe 121. By setting the preheating assembly 25, the return square tube... The heat recovery structure composed of 251, heat-conducting plate 252, and return pipe 253 can recover the heat flow after cooling the slag into the guide pipe 121, thereby preheating the air therein. The hot air is transported to the return pipe 253 through the return square pipe 251, and then transported into the guide pipe 121 through the return pipe 253. The heat-conducting plate 252 can absorb and store heat, maintain the heat in the return pipe 253, and increase the stability of waste heat recovery and utilization.

[0041] The working principle of this embodiment is as follows: When slag needs to be discharged, the slag falls from the funnel mesh 133 into the conveying pipe 211. Then, the servo motor 222 is started, which drives the spiral plate 223 to convey the slag from the conveying pipe 211 to the mesh pipe 212. The mesh pipe 212 allows air to pass through unimpeded. The slag is then fed into the feeding pipe 221 through the mesh pipe 212 and the discharge pipe 213. After passing through the feeding pipe 221, the slag falls onto the guide grid 242 in the discharge square pipe 241. Then, the electric fan 2 is started. 33. The electric fan 233 will deliver outside air downwards. The air will flow from the guide pipe 232 into the conveying square pipe 231, and then the air will be conveyed to the slag. The slag's temperature will be carried away and conveyed downwards. The hot air will flow into the return pipe 253 through the return square pipe 251, heating the heat-conducting plate 252 and conveying it to the guide pipe 121, thereby heating the airflow in the guide pipe 121. Then, the discharge valve 243 is connected to the slag recycling equipment to recycle the slag into the slag recycling equipment.

[0042] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fluidized bed furnace for sulfuric acid preparation with a slag auxiliary discharge structure, comprising a collection mechanism (1) and a discharge mechanism (2), characterized in that: The emission mechanism (2) is located on the surface of the collection mechanism (1). The collection mechanism (1) includes an air supply component (11), a slag discharge component (12), a concentrating component (13), and a flow guiding component (14). The slag discharge component (12) is located on the right side of the air supply component (11). The concentrating component (13) is located on top of the slag discharge component (12). The flow guiding component (14) is located inside the concentrating component (13). The emission mechanism (2) includes a guiding component (21), a conveying component (22), and a cooling component (24). The assembly comprises a cooling component (23), an exhaust component (24), and a preheating component (25). The guiding component (21) is located at the bottom inside the concentrating component (13). The conveying component (22) is located to the right of the guiding component (21). The cooling component (23) is located at the top of the conveying component (22). The exhaust component (24) is located at the bottom of the cooling component (23). The preheating component (25) is located to the left of the exhaust component (24).

2. A fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation according to claim 1, characterized in that: The air supply assembly (11) includes a fixed base (111), a blower (112) and an air supply pipe (113). The blower (112) is bolted to the left side of the fixed base (111), and the air supply pipe (113) is connected to the output end of the blower (112).

3. A fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation according to claim 2, characterized in that: The slag discharge assembly (12) includes a guide pipe (121), a discharge pipe (122), and an electric auger (123). The guide pipe (121) is connected to the right side of the air supply pipe (113), the discharge pipe (122) is connected to the bottom of the guide pipe (121), and the electric auger (123) is bolted to the right side of the guide pipe (121).

4. A fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation according to claim 3, characterized in that: The central assembly (13) includes a boiling furnace (131), a guide box (132), and a funnel mesh (133). The boiling furnace (131) is connected to the top of the guide tube (121), the guide box (132) is connected to the left side of the boiling furnace (131), and the funnel mesh (133) is bolted to the top of the inner side of the boiling furnace (131).

5. A fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation according to claim 4, characterized in that: The flow guiding assembly (14) includes an air guiding funnel pipe (141), an air guiding plate (142), and a flow dividing plate (143). The air guiding funnel pipe (141) is connected to the bottom of the inner side of the fluidized bed furnace (131). The air guiding plate (142) is bolted to the top of the inner side of the air guiding funnel pipe (141). The flow dividing plate (143) is bolted to the bottom of the air guiding plate (142). The flow dividing plate (143) is designed as an arc surface.

6. A fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation according to claim 4, characterized in that: The guiding component (21) includes a conveying pipe (211), a mesh pipe (212), and a discharge pipe (213). The conveying pipe (211) is connected to the bottom of the funnel mesh (133), the mesh pipe (212) is connected to the right side of the conveying pipe (211), and the discharge pipe (213) is connected to the right side of the mesh pipe (212). The right side of the discharge pipe (213) passes through the right side of the fluidized bed furnace (131) and is connected to the fluidized bed furnace (131).

7. A fluidized bed furnace for sulfuric acid preparation with a slag auxiliary discharge structure according to claim 6, characterized in that: The conveying assembly (22) includes a feeding pipe (221), a servo motor (222), and a spiral plate (223). The feeding pipe (221) is connected to the right side of the discharge pipe (213). The servo motor (222) is bolted to the right side of the feeding pipe (221). The spiral plate (223) is bolted to the output end of the servo motor (222). The surface of the spiral plate (223) is in contact with the inner side of the feeding pipe (221). The left side of the surface of the spiral plate (223) is in contact with the inner side of the mesh pipe (212). The left side of the surface of the spiral plate (223) is in contact with the bottom of the inner side of the conveying pipe (211).

8. A fluidized bed furnace for sulfuric acid preparation with a slag auxiliary discharge structure according to claim 7, characterized in that: The cooling assembly (23) includes a conveying square tube (231), a guide tube (232), and an electric fan (233). The conveying square tube (231) is connected to the top of the feeding tube (221), the guide tube (232) is connected to the top of the conveying square tube (231), and the electric fan (233) is connected to the top of the guide tube (232).

9. A fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation according to claim 8, characterized in that: The discharge assembly (24) includes a discharge square tube (241), a guide grille (242), and a discharge valve (243). The discharge square tube (241) is connected to the bottom of the conveying square tube (231). The top of the discharge square tube (241) passes through the bottom of the feeding pipe (221) and is connected to the bottom of the feeding pipe (221). The guide grille (242) is bolted to the inside of the discharge square tube (241). The discharge valve (243) is connected to the right side of the discharge square tube (241).

10. A fluidized bed furnace with slag auxiliary discharge structure for sulfuric acid preparation according to claim 9, characterized in that: The preheating assembly (25) includes a return square tube (251), a heat-conducting plate (252), and a return pipe (253). The return square tube (251) is connected to the bottom of the discharge square tube (241). The heat-conducting plate (252) is bolted to the bottom of the return square tube (251). The return pipe (253) is connected to the bottom of the return square tube (251). The inner side of the return pipe (253) is in contact with the surface of the heat-conducting plate (252). The left side of the return pipe (253) is connected to the right side of the guide pipe (121).

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