Sulfuric acid production waste heat efficient recovery and reutilization process

Abstract

The invention relates to the technical field of sulfuric acid production equipment, and discloses a sulfuric acid production waste heat efficient recovery and reutilization process which comprises an equipment base, supporting seat plates are fixedly installed on the left side and the right side of the upper end face of the equipment base, and a U-shaped seat is rotationally installed between the supporting seat plates on the left side and the right side; a rotating mechanism is arranged on the side wall of the supporting seat plate located on the left side, a preheating barrel is fixedly mounted on the bottom face of an inner cavity of the U-shaped seat, a mounting frame is fixedly mounted on the upper end face of the preheating barrel, an air inlet mechanism is arranged on the front portion of the outer side wall of the preheating barrel, and a mixing mechanism is arranged in the middle of the upper end face of the mounting frame; purifying mechanisms are arranged on the left and right sides of the upper end surface of the mounting frame. Through cooperation of the mixing mechanism, the purifying mechanism and the like, sulfur particles in the preheating cylinder are preheated, the subsequent roasting efficiency of sulfur in the heating furnace is improved, and meanwhile, the purifying mechanism is arranged, so that harmful substances in waste gas can be effectively absorbed.

Description

Technical Field

[0001] The present invention relates to the technical field of sulfuric acid production equipment, and in particular to a process for efficiently recovering and reusing waste heat from sulfuric acid production. Background Art

[0002] The total annual sulfuric acid production in China currently stands at 50 million tons, of which 20 million tons are produced from pyrite. The typical production process for pyrite production involves flotation of the pyrite ore to produce a sulfur concentrate with a sulfur content of approximately 45%. This concentrate is then dried and roasted, producing high-temperature raw gas that enters a waste heat boiler (WHRB) to generate superheated medium-pressure steam for power generation or, after power generation, to provide low-pressure steam products. After waste heat recovery, the raw gas enters cyclones, electrostatic precipitators, and other dust removal equipment, reducing its temperature to approximately 320°C. The raw gas from the electrostatic precipitator (ESP) enters scrubbers, washing towers, and electrostatic demisters (ESDs), producing purified SO2 gas. This is typically purified using an environmentally friendly acid-washing process. After exiting the EDF, the gas enters a drying tower for drying, where it is then pressurized by a main fan before entering a conversion and absorption system.

[0003] After searching, it was found that a high-efficiency sulfuric acid waste heat recovery device proposed in patent publication number CN203741042U includes: an absorption tower, a circulating acid tank, a steam generator and a feed water heater. The circulating acid tank is connected to the bottom of the absorption tower and is equipped with a circulating acid pump. The primary conversion gas containing SO3 enters from the bottom of the absorption tower and contacts with the sulfuric acid in the absorption tower. The temperature of the sulfuric acid that has absorbed SO3 increases and flows into the circulating acid tank. The circulating acid pump sends it to the steam generator for heat exchange with water from the feed water heater. The temperature of the sulfuric acid decreases and steam is generated at the same time. The generated steam is drawn out from the first outlet on the steam generator.

[0004] The aforementioned patent documents primarily utilize clean water for waste gas heat exchange. This waste heat recovery method requires a large amount of clean water, which inadvertently increases the factory's operating costs. Furthermore, the heated water easily forms scale, such as calcium carbonate and calcium sulfate, which adheres to the heat exchanger surface, reducing thermal conductivity. This requires regular cleaning or chemical descaling, increasing maintenance costs. Therefore, a process for efficiently recovering and reusing waste heat from sulfuric acid production is urgently needed to address this issue. Summary of the Invention

[0005] (1) Technical problems solved

[0006] The object of the present invention is to provide a process for efficiently recovering and reusing waste heat from sulfuric acid production, so as to solve the problems raised in the above-mentioned background technology.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a process for efficiently recovering and reusing waste heat from sulfuric acid production, comprising an equipment base, support seat plates being fixedly installed on the left and right sides of the upper end surface of the equipment base, a U-shaped seat being rotatably installed between the support seat plates on the left and right sides, a rotating mechanism being provided on the side wall of the support seat plate on the left side, a preheating barrel being fixedly installed on the bottom surface of the inner cavity of the U-shaped seat, a mounting frame being fixedly installed on the upper end surface of the preheating barrel, an air intake mechanism being provided on the front part of the outer side wall of the preheating barrel, a mixing mechanism being provided in the middle part of the upper end surface of the mounting frame, and a purification mechanism being provided on the left and right sides of the upper end surface of the mounting frame.

[0009] Preferably, the rotating mechanism includes a driven gear fixedly mounted on the end of the U-shaped seat shaft, a rotating motor is fixedly mounted on the side wall of the support seat plate on the left side through a frame, a driving gear is fixedly mounted on the output shaft end of the rotating motor, and the driving gear is meshed and connected with the driven gear.

[0010] Preferably, a cover plate is detachably mounted on the upper portion of the inner wall of the preheating barrel, a discharge port is fixedly mounted on the upper front portion of the outer wall of the preheating barrel, and a blocking plate is detachably mounted on the inner cavity of the discharge port.

[0011] Preferably, the air intake mechanism includes a transmission rod rotatably mounted on the left and right sides of the upper end surface of the mounting frame, a V-shaped frame fixedly mounted in the middle of the upper end surface of the mounting frame, an air intake ring fixedly mounted on the inner side wall of the V-shaped frame, an exhaust gas inlet pipe fixedly mounted on the side wall of the air intake ring, and the exhaust gas inlet pipe is connected to the exhaust gas outlet of the sulfuric acid production furnace.

[0012] Preferably, the transmission rod is hollow, a through hole is provided on the upper portion of the outer wall of the transmission rod located in the inner cavity of the air intake ring, an exhaust port is provided on the lower portion of the outer wall of the transmission rod, and the transmission rod is rotatably connected to the cover plate.

[0013] Preferably, the mixing mechanism includes a connecting rod rotatably mounted in the middle of the inner cavity of the V-frame, and a rotating disk fixedly mounted in the middle of the side wall of the connecting rod. Positioning gears are fixedly mounted on the upper portions of the outer side walls of the transmission rods on the left and right sides. Tooth grooves are equidistantly arranged on the left and right sides of the rotating disk, and the rotating disk is meshed and connected with the left and right positioning gears.

[0014] Preferably, a mixing motor is fixedly installed on the side wall of the inner cavity of the V-shaped frame through a frame, the output shaft end of the mixing motor is fixedly connected to the transmission rod on the right, and a stirring frame is fixedly installed on the lower part of the outer wall of the connecting rod in the inner cavity of the preheating barrel.

[0015] Preferably, the purification mechanism includes a purification box fixedly mounted on the left and right sides of the upper end surface of the mounting frame, and an adsorption hole plate fixedly mounted on the front and rear sides of the inner cavity side wall of the purification box, and extension rods are fixedly mounted on the left and right ends of the connecting rod, and cam blocks are fixedly mounted on the ends of the extension rods.

[0016] Preferably, a push rod is slidably installed in the inner cavity of the purification box, a top sleeve is fixedly installed in the middle of the side wall of the push rod, a return spring is wound around the side wall of the push rod, one end of the return spring is fixedly installed on the inner wall of the purification box, and the other end is fixedly installed on the side wall of the top sleeve.

[0017] Preferably, scraping plates are fixedly installed at the front and rear ends of the top sleeve, the adsorption hole plate is made of activated carbon, an air outlet ring is fixedly installed at the rear of the outer wall of the preheating barrel, the air outlet ring is connected to the purification box, and an exhaust pipe is fixedly installed on the front end face of the purification box.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In this invention, workers can put sulfur particles into the preheating barrel from the cover plate. At this time, the exhaust valve at the heating furnace is opened to allow the high-temperature exhaust gas to enter the inner cavity of the intake ring through the exhaust inlet pipe. At this time, the high-temperature exhaust gas in the intake ring can enter the inner cavity of the transmission rod through the through hole opened on the outer wall of the transmission rod, and then be discharged from the exhaust port opened on the side wall of the transmission rod, so that the high-temperature exhaust gas enters the preheating barrel and contacts with the sulfur particles for heat exchange, thereby recovering the waste heat of the high-temperature exhaust gas. Multiple groups of exhaust ports are set on the side wall of the transmission rod, which can be evenly diffused in the sulfur. The sulfur particles are everywhere to improve the heat exchange efficiency of the high-temperature exhaust gas; the driving rod on the right side can be rotated by starting the mixing motor, and a positioning gear is fixedly installed on the side wall of the driving rod. The rotating disk is engaged with the left and right positioning gears. At this time, the positioning gear on the right side can drive the rotating disk to rotate the positioning gear on the left side, and the driving rods on the left and right sides can drive the stirring frame to rotate in parallel to achieve stirring of the sulfur particles in the preheating barrel, thereby increasing the contact area between the high-temperature exhaust gas and the sulfur particles, and further improving the efficiency of the entire device in recovering the waste heat of the exhaust gas.

[0020] 2. In this invention, when the rotating disk rotates, the connecting rod fixed in its inner cavity will also rotate. The connecting rod can drive the extension rod to rotate the cam block. Under the cooperation of the reset spring, the cam block can squeeze the top rod to make the top sleeve slide up and down in the inner cavity of the purification box. The top sleeve can drive the scraper plate to slide up and down on the side wall of the adsorption hole plate to dredge the adsorption hole plate so that the adsorption hole plate can maintain continuous circulation. At this time, the high-temperature exhaust gas in the preheating barrel after heat exchange will be converted into low-temperature exhaust gas. The low-temperature exhaust gas can enter the purification box through the pipeline. Under the cooperation of the adsorption hole plate, the waste gas can be The toxic and harmful substances in the exhaust gas are intercepted and adsorbed to ensure the safety and environmental protection of the discharged gas; after the sulfur particles in the preheating barrel are preheated by the high-temperature exhaust gas, the rotating motor can be started to rotate, and the driving gear is engaged with the driven gear through the driving gear. At this time, the driven gear can drive the U-shaped seat to rotate. The preheating barrel is fixedly installed on the U-shaped seat. At this time, the preheating barrel can be turned over, and the high-temperature sulfur particles in the preheating barrel can be discharged by removing the blocking plate in the inner cavity of the discharge port to provide subsequent sulfur particle roasting for preheating treatment, which effectively reduces the cost of sulfuric acid production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency recovery and reuse process for waste heat from sulfuric acid production according to the present invention;

[0022] Figure 2 This is a rear view schematic diagram of the overall structure of a process for efficiently recovering and reusing waste heat from sulfuric acid production according to the present invention;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the air intake ring of a process for efficiently recovering and reusing waste heat from sulfuric acid production according to the present invention;

[0024] Figure 4 This is a schematic diagram of a partial structure of a high-efficiency recovery and reuse process for waste heat from sulfuric acid production according to the present invention;

[0025] Figure 5 This is a schematic diagram of a top view of a partial structure of a process for efficiently recovering and reusing waste heat from sulfuric acid production according to the present invention;

[0026] Figure 6 This is a schematic diagram of the connection structure of a mixing mechanism for a process for efficiently recovering and reusing waste heat from sulfuric acid production according to the present invention;

[0027] Figure 7 The present invention is a schematic cross-sectional structural diagram of a purification box for a process for efficiently recovering and reusing waste heat from sulfuric acid production.

[0028] In the figure: 1. Equipment base; 2. Support seat plate; 3. U-shaped seat; 4. Rotating mechanism; 41. Driven gear; 42. Rotating motor; 43. Driving gear; 5. Preheating barrel; 51. Cover plate; 52. Exhaust port; 6. Mounting frame; 7. Air intake mechanism; 71. Transmission rod; 711. Through hole; 712. Exhaust port; 713. Positioning gear; 72. V-shaped frame; 73. Intake ring; 74. Exhaust gas inlet pipe; 8. Mixing mechanism; 81. Connecting rod; 82. Rotating disk; 83. Mixing motor; 84. Stirring frame; 9. Purification mechanism; 91. Purification box; 92. Adsorption hole plate; 93. Extension rod; 94. Cam block; 95. Ejector rod; 96. Ejector sleeve; 97. Return spring; 98. Scraper plate; 99. Exhaust ring; 910. Exhaust pipe. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 7 The present invention provides a process technology for efficiently recovering and reusing waste heat from sulfuric acid production:

[0031] A highly efficient process for recovering and reusing waste heat from sulfuric acid production comprises an equipment base 1, support base plates 2 being fixedly mounted on the left and right sides of the upper end surface of the equipment base 1, a U-shaped seat 3 being rotatably mounted between the support base plates 2 on the left and right sides, a rotating mechanism 4 being provided on the side wall of the support base plate 2 on the left side, a preheating barrel 5 being fixedly mounted on the bottom surface of the inner cavity of the U-shaped seat 3, a mounting frame 6 being fixedly mounted on the upper end surface of the preheating barrel 5, an air intake mechanism 7 being provided on the front portion of the outer side wall of the preheating barrel 5, a mixing mechanism 8 being provided in the middle portion of the upper end surface of the mounting frame 6, and a purification mechanism 9 being provided on the left and right sides of the upper end surface of the mounting frame 6.

[0032] Furthermore, the rotating mechanism 4 includes a driven gear 41 fixedly mounted on the shaft end of the U-shaped seat 3, a rotating motor 42 fixedly mounted on the side wall of the support base plate 2 on the left side through a frame, and a driving gear 43 fixedly mounted on the output shaft end of the rotating motor 42, and the driving gear 43 is meshed and connected with the driven gear 41;

[0033] A cover plate 51 is detachably mounted on the upper portion of the inner wall of the preheating barrel 5 , a discharge port 52 is fixedly mounted on the upper portion of the front side of the outer wall of the preheating barrel 5 , and a blocking plate is detachably mounted on the inner cavity of the discharge port 52 .

[0034] It should be noted that after the sulfur particles in the preheating barrel 5 are preheated by the high-temperature exhaust gas, the rotating motor 42 can be started to rotate the driving gear 43, and the driving gear 43 is meshed with the driven gear 41. At this time, the driven gear 41 can drive the U-shaped seat 3 to rotate. The preheating barrel 5 is fixedly installed on the U-shaped seat 3. At this time, the preheating barrel 5 can be turned over. By removing the blocking plate in the inner cavity of the discharge port 52, the high-temperature sulfur particles in the preheating barrel 5 can be discharged to provide subsequent sulfur particle roasting for preheating treatment, thereby effectively reducing the cost of sulfuric acid production.

[0035] Furthermore, the air intake mechanism 7 includes a transmission rod 71 rotatably mounted on the left and right sides of the upper end surface of the mounting frame 6, a V-shaped frame 72 fixedly mounted in the middle of the upper end surface of the mounting frame 6, an air intake ring 73 fixedly mounted on the inner side wall of the V-shaped frame 72, and an exhaust gas inlet pipe 74 fixedly mounted on the side wall of the air intake ring 73. The exhaust gas inlet pipe 74 is connected to the exhaust gas outlet 52 of the sulfuric acid production furnace;

[0036] The transmission rod 71 is hollow, and a through hole 711 is provided on the upper portion of the outer wall of the transmission rod 71 in the inner cavity of the air intake ring 73, and an exhaust port 712 is provided on the lower portion of the outer wall of the transmission rod 71. The transmission rod 71 is rotatably connected to the cover plate 51, and multiple groups of exhaust ports 712 are provided on the side wall of the transmission rod 71.

[0037] It should be noted that workers can put sulfur particles into the preheating barrel 5 from the cover plate 51. At this time, the exhaust valve at the heating furnace is opened to allow the high-temperature exhaust gas to enter the inner cavity of the intake ring 73 through the exhaust gas inlet pipe 74. At this time, the high-temperature exhaust gas in the intake ring 73 can enter the inner cavity of the transmission rod 71 through the through hole 711 opened on the outer wall of the transmission rod 71, and then be discharged from the exhaust port 712 opened on the side wall of the transmission rod 71, so that the high-temperature exhaust gas enters the preheating barrel 5, contacts and exchanges heat with the sulfur particles, and realizes the recovery of the waste heat of the high-temperature exhaust gas. Multiple groups of exhaust ports 712 are set on the side wall of the transmission rod 71, which can be evenly diffused throughout the sulfur particles to improve the heat exchange efficiency of the high-temperature exhaust gas.

[0038] Furthermore, the mixing mechanism 8 includes a connecting rod 81 rotatably mounted in the middle of the inner cavity of the V-shaped frame 72, and a rotating disk 82 fixedly mounted in the middle of the side wall of the connecting rod 81. Positioning gears 713 are fixedly mounted on the upper portion of the outer side walls of the transmission rods 71 ​​on both sides. Tooth grooves are equidistantly provided on the left and right sides of the rotating disk 82. The rotating disk 82 is meshed with the left and right positioning gears 713.

[0039] A mixing motor 83 is fixedly installed on the inner side wall of the V-shaped frame 72 through the frame. The output shaft end of the mixing motor 83 is fixedly connected to the transmission rod 71 on the right side. A stirring frame 84 is fixedly installed on the lower part of the outer wall of the connecting rod 81 in the inner cavity of the preheating barrel 5.

[0040] It should be noted that the transmission rod 71 on the right can be rotated by starting the mixing motor 83. A positioning gear 713 is fixedly installed on the side wall of the transmission rod 71. The rotating disk 82 is meshed with the left and right positioning gears 713. At this time, the right positioning gear 713 can drive the rotating disk 82 to rotate the left positioning gear 713. The transmission rods 71 ​​on the left and right sides can drive the stirring frame 84 to rotate in parallel, so as to stir the sulfur particles in the preheating barrel 5, increase the contact area between the high-temperature exhaust gas and the sulfur particles, and further improve the efficiency of the entire device in recovering the waste heat of the exhaust gas.

[0041] Furthermore, the purification mechanism 9 includes a purification box 91 fixedly mounted on the left and right sides of the upper end surface of the mounting frame 6, and an adsorption hole plate 92 fixedly mounted on the front and rear sides of the inner cavity side wall of the purification box 91. Extension rods 93 are fixedly mounted on the left and right ends of the connecting rod 81, and cam blocks 94 are fixedly mounted on the ends of the extension rods 93.

[0042] A push rod 95 is slidably mounted in the inner cavity of the purification box 91, a top sleeve 96 is fixedly mounted in the middle of the side wall of the push rod 95, and a return spring 97 is wound around the side wall of the push rod 95. One end of the return spring 97 is fixedly mounted on the inner wall of the purification box 91, and the other end is fixedly mounted on the side wall of the top sleeve 96;

[0043] Scraping plates 98 are fixedly installed at the front and rear ends of the top sleeve 96. The adsorption hole plate 92 is made of activated carbon. An air outlet ring 99 is fixedly installed at the rear of the outer wall of the preheating barrel 5. The air outlet ring 99 is connected to the purification box 91. An exhaust pipe 910 is fixedly installed on the front end face of the purification box 91.

[0044] It should be noted that when the rotating disk 82 rotates, the connecting rod 81 fixed in its inner cavity will also rotate. The connecting rod 81 can drive the extension rod 93 to rotate the cam block 94. Under the cooperation of the return spring 97, the cam block 94 can squeeze the top rod 95 to make the top sleeve 96 slide up and down in the inner cavity of the purification box 91. The top sleeve 96 can drive the scraper plate 98 to slide up and down on the side wall of the adsorption hole plate 92 to dredge the adsorption hole plate 92 so that the adsorption hole plate 92 can continue to maintain circulation. At this time, the high-temperature exhaust gas after heat exchange in the preheating barrel 5 will be converted into low-temperature exhaust gas. The low-temperature exhaust gas can enter the purification box 91 through the pipeline. Under the cooperation of the adsorption hole plate 92, the toxic substances in the exhaust gas can be intercepted and adsorbed to ensure the safety and environmental protection of the discharged gas.

[0045] Working principle:

[0046] During work, workers can put sulfur particles into the preheating barrel 5 from the cover plate 51. At this time, the exhaust valve at the heating furnace is opened to allow the high-temperature exhaust gas to enter the inner cavity of the intake ring 73 through the exhaust inlet pipe 74. At this time, the high-temperature exhaust gas in the intake ring 73 can enter the inner cavity of the transmission rod 71 through the through hole 711 opened on the outer wall of the transmission rod 71, and then be discharged from the exhaust port 712 opened on the side wall of the transmission rod 71, so that the high-temperature exhaust gas enters the preheating barrel 5, contacts and exchanges heat with the sulfur particles, and realizes the recovery of the waste heat of the high-temperature exhaust gas. Multiple groups of exhaust ports 712 are set on the side wall of the transmission rod 71, which can be evenly diffused throughout the sulfur particles to improve the heat exchange efficiency of the high-temperature exhaust gas.

[0047] The mixing motor 83 can be started to rotate the transmission rod 71 on the right side. A positioning gear 713 is fixedly installed on the side wall of the transmission rod 71. The rotating disk 82 is meshed with the left and right positioning gears 713. At this time, the right positioning gear 713 can drive the rotating disk 82 to rotate the left positioning gear 713. The transmission rods 71 ​​on both sides can drive the stirring frame 84 to rotate in parallel, so as to achieve stirring of the sulfur particles in the preheating barrel 5, increase the contact area between the high-temperature exhaust gas and the sulfur particles, and further improve the efficiency of the entire device in recovering the waste heat of the exhaust gas.

[0048] When the rotating disk 82 rotates, the connecting rod 81 fixed in its inner cavity will also rotate. The connecting rod 81 can drive the extension rod 93 to rotate the cam block 94. Under the cooperation of the return spring 97, the cam block 94 can squeeze the ejector rod 95 to make the top sleeve 96 slide up and down in the inner cavity of the purification box 91. The top sleeve 96 can drive the scraper plate 98 to slide up and down on the side wall of the adsorption hole plate 92 to dredge the adsorption hole plate 92 so that the adsorption hole plate 92 can maintain continuous circulation. At this time, the high-temperature exhaust gas after heat exchange in the preheating barrel 5 will be converted into low-temperature exhaust gas. The low-temperature exhaust gas can enter the purification box 91 through the pipeline. Under the cooperation of the adsorption hole plate 92, the toxic substances in the exhaust gas can be intercepted and adsorbed to ensure the safety and environmental protection of the discharged gas.

[0049] After the sulfur particles in the preheating barrel 5 are preheated by the high-temperature exhaust gas, the rotating motor 42 can be started to rotate the driving gear 43, and the driving gear 43 is meshed with the driven gear 41. At this time, the driven gear 41 can drive the U-shaped seat 3 to rotate. The preheating barrel 5 is fixedly installed on the U-shaped seat 3. At this time, the preheating barrel 5 can be turned over. By removing the blocking plate in the inner cavity of the discharge port 52, the high-temperature sulfur particles in the preheating barrel 5 can be discharged to provide subsequent sulfur particle roasting for preheating treatment, thereby effectively reducing the cost of sulfuric acid production.

[0050] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A process for efficiently recovering and reusing waste heat from sulfuric acid production, comprising an equipment base (1), characterized in that: Support base plates (2) are fixedly installed on the left and right sides of the upper end surface of the equipment base (1); a U-shaped seat (3) is rotatably installed between the support base plates (2) on the left and right sides; a rotating mechanism (4) is provided on the side wall of the support base plate (2) on the left side; a preheating barrel (5) is fixedly installed on the bottom surface of the inner cavity of the U-shaped seat (3); a mounting frame (6) is fixedly installed on the upper end surface of the preheating barrel (5); an air intake mechanism (7) is provided on the front part of the outer side wall of the preheating barrel (5); a mixing mechanism (8) is provided in the middle part of the upper end surface of the mounting frame (6); and a purification mechanism (9) is provided on the left and right sides of the upper end surface of the mounting frame (6).

2. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 1, characterized in that: The rotating mechanism (4) comprises a driven gear (41) fixedly mounted on the shaft end of the U-shaped seat (3); a rotating motor (42) is fixedly mounted on the side wall of the support seat plate (2) on the left side via a frame; a driving gear (43) is fixedly mounted on the output shaft end of the rotating motor (42); and the driving gear (43) is meshedly connected with the driven gear (41).

3. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 1, characterized in that: A cover plate (51) is detachably mounted on the upper portion of the inner wall of the preheating barrel (5), a discharge port (52) is fixedly mounted on the upper portion of the front side of the outer wall of the preheating barrel (5), and a blocking plate is detachably mounted on the inner cavity of the discharge port (52).

4. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 3, characterized in that: The air intake mechanism (7) comprises a transmission rod (71) rotatably mounted on the left and right sides of the upper end surface of the mounting frame (6), a V-shaped frame (72) fixedly mounted in the middle of the upper end surface of the mounting frame (6), an air intake ring (73) fixedly mounted on the inner side wall of the V-shaped frame (72), an exhaust gas inlet pipe (74) fixedly mounted on the side wall of the air intake ring (73), and the exhaust gas inlet pipe (74) is connected to the exhaust gas outlet of the sulfuric acid production furnace.

5. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 4, characterized in that: The transmission rod (71) is hollow, and a through hole (711) is provided at the upper portion of the outer wall of the transmission rod (71) located in the inner cavity of the air intake ring (73), and an exhaust port (712) is provided at the lower portion of the outer wall of the transmission rod (71). The transmission rod (71) is rotatably connected to the cover plate (51).

6. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 4, characterized in that: The mixing mechanism (8) comprises a connecting rod (81) rotatably mounted in the middle of the inner cavity of the V-shaped frame (72), and a rotating disk (82) fixedly mounted in the middle of the side wall of the connecting rod (81). Positioning gears (713) are fixedly mounted on the upper portions of the outer side walls of the transmission rod (71) on the left and right sides. Tooth grooves are equidistantly arranged on the left and right sides of the rotating disk (82). The rotating disk (82) is meshed and connected with the left and right positioning gears (713).

7. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 6, characterized in that: A mixing motor (83) is fixedly mounted on the inner cavity side wall of the V-shaped frame (72) through a frame, an output shaft end of the mixing motor (83) is fixedly connected to the transmission rod (71) on the right side, and a stirring frame (84) is fixedly mounted on the lower portion of the outer wall of the connecting rod (81) in the inner cavity of the preheating barrel (5).

8. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 6, wherein: The purification mechanism (9) comprises a purification box (91) fixedly mounted on the left and right sides of the upper end surface of the mounting frame (6), and an adsorption hole plate (92) fixedly mounted on the front and rear sides of the inner cavity side wall of the purification box (91). The left and right ends of the connecting rod (81) are fixedly mounted with an extension rod (93), and the end of the extension rod (93) is fixedly mounted with a cam block (94).

9. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 8, characterized in that: A push rod (95) is slidably mounted in the inner cavity of the purification box (91), a top sleeve (96) is fixedly mounted in the middle of the side wall of the push rod (95), a return spring (97) is wound around the side wall of the push rod (95), one end of the return spring (97) is fixedly mounted on the inner wall of the purification box (91), and the other end is fixedly mounted on the side wall of the top sleeve (96).

10. The process for efficiently recovering and reusing waste heat from sulfuric acid production according to claim 9, characterized in that: The front and rear ends of the top sleeve (96) are fixedly mounted with scraping plates (98); the adsorption hole plate (92) is made of activated carbon; an air outlet ring (99) is fixedly mounted on the rear portion of the outer wall of the preheating barrel (5); the air outlet ring (99) is connected to the purification box (91); and an exhaust pipe (910) is fixedly mounted on the front end surface of the purification box (91).

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