A sulfuric acid production air supply system with automatic flow increase when main air blower is stopped

Abstract

The present application relates to the technical field of sulfuric acid production, in particular to a kind of main fan jump stop automatic flow increasing sulfuric acid production air supply system, comprising: base, the base is equipped with the fixed plate and baffle of symmetric setting;Auxiliary fan support, installed on the base, the base is also fixed with main fan support, the auxiliary fan support and the main fan support are respectively provided with a plurality of No. 1 fan blade and No. 2 fan blade of circumferential equidistant distribution, the fixed plate is provided with air supply mechanism connected with the No. 1 fan blade and the No. 2 fan blade;Drive mechanism, set on the fixed plate and connected with the air supply mechanism, the drive mechanism can drive the No. 1 fan blade and the No. 2 fan blade to rotate by the air supply mechanism;Characterized in that, it further includes: rotational speed control mechanism, set on the fixed plate and connected with the drive mechanism;Adjusting assembly, set on the baffle and connected with the rotational speed control mechanism.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sulfuric acid production, in particular to a sulfuric acid production air supply system capable of automatically increasing air flow when a main air blower is stopped. BACKGROUND

[0002] The most important industrial method for producing sulfuric acid is the contact method, the main raw material of which is sulfur dioxide in burning sulfur or iron sulfide, which is oxidized to sulfur trioxide under the action of oxygen and is absorbed in water to obtain sulfuric acid of any concentration.

[0003] The main air blower of the sulfuric acid device is a large core dynamic equipment, and the rotor has a maximum rotating speed of more than 4900 r / min. The running state is the fundamental guarantee for the safe production of the sulfuric acid device.

[0004] The running speed of the main air blower is adjusted by a speed regulation mechanism. However, during the initial low-load operation, the air blower will run in the surge zone for 2-4 hours, which will cause great damage to the air blower. In addition, with the high-load operation of the sulfuric acid device, once the main air blower fails and stops, the sulfur dioxide and sulfur trioxide flue gas in the system cannot be replaced by air, and there is a great risk of backflow of high-temperature flue gas, which has great safety and environmental protection risks. SUMMARY

[0005] The purpose of the present application is to provide a sulfuric acid production air supply system capable of automatically increasing air flow when the main air blower is stopped, so as to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A sulfuric acid production air supply system capable of automatically increasing air flow when the main air blower is stopped, comprising:

[0008] A base, on which a fixed plate and a baffle plate are symmetrically arranged;

[0009] An auxiliary air blower support is installed on the base, and a main air blower support is also fixed on the base. A plurality of first and second fan blades are circumferentially and equidistantly arranged on the auxiliary air blower support and the main air blower support, respectively. An air supply mechanism is arranged on the fixed plate and connected with the first and second fan blades. The air supply mechanism can drive the first and second fan blades to rotate.

[0010] A driving mechanism is arranged on the fixed plate and connected with the air supply mechanism. The driving mechanism can drive the first and second fan blades to rotate through the air supply mechanism.

[0011] The application is characterized in that it further comprises:

[0012] A rotating speed regulating mechanism is arranged on the fixed plate and connected with the driving mechanism, and the rotating speed regulating mechanism can adjust the rotating speed of the first and second fan blades through the driving mechanism and control the movement state of the first and second fan blades.

[0013] An adjusting assembly is arranged on the baffle and connected with the rotating speed regulating mechanism, and the adjusting assembly can drive the driving mechanism to move through the rotating speed regulating mechanism.

[0014] As a further scheme of the present application, the air supply mechanism comprises guide pipes respectively arranged at the ends of the auxiliary fan support and the main fan support, and a collecting pipe is fixed on the guide pipes and connected with the guide pipes. The auxiliary fan support and the main fan support are provided with driven assemblies connected with the driving mechanism, and the driven assemblies are connected with the first and second fan blades.

[0015] As a further scheme of the present application, the driven assemblies comprise a first rotating rod rotatably arranged on the auxiliary fan support, a first belt connected with the driving mechanism is sleeved on the first rotating rod, a second rotating rod is rotatably arranged on the main fan support, a second belt connected with the driving mechanism is sleeved on the second rotating rod, the first rotating rod is fixedly connected with the first fan blade, and the second rotating rod is fixedly connected with the second fan blade.

[0016] As a further scheme of the present application, the driving mechanism comprises a motor arranged on the fixed plate, a transmission rod connected with the output shaft of the motor is rotatably arranged on the fixed plate, symmetrical rotating discs are movably arranged on the transmission rod, a sliding assembly connected with the rotating discs is arranged on the fixed plate, the sliding assembly is connected with the first and second belts, and the transmission rod is connected with the rotating speed regulating mechanism.

[0017] As a further scheme of the present application, the sliding assembly comprises a plurality of slide grooves which are circumferentially and equidistantly arranged on the side of the rotating disc away from the fixed plate, a sliding rod is slidably arranged in each slide groove, and an arc-shaped plate is fixed on the end of the sliding rod away from the slide groove. Two groups of the arc-shaped plates are respectively connected with the first and second belts, and the sliding rod is connected with the rotating speed regulating mechanism.

[0018] As a further further scheme of the present application: the rotating speed regulating mechanism comprises a limiting sleeve movably mounted on the transmission rod, a first movable sleeve movably mounted on the transmission rod and abutting against one end of the limiting sleeve, and a second movable sleeve movably mounted on the transmission rod and abutting against the other end of the limiting sleeve, the fixed plate is provided with an elastic assembly connected with the first movable sleeve and the second movable sleeve, the elastic assembly is connected with the sliding rod, and the limiting sleeve is connected with the adjusting assembly.

[0019] As a further further scheme of the present application: the elastic assembly comprises limiting grooves respectively formed in inner walls of the first movable sleeve and the second movable sleeve, the transmission rod is fixed with limiting rods symmetrically arranged and clamped with the limiting grooves, the first movable sleeve and the second movable sleeve are respectively hinged with connecting rods circumferentially equidistantly distributed and hinged with the sliding rod, and the transmission rod is sleeved with springs abutting against the first movable sleeve and the second movable sleeve, respectively.

[0020] As a further further scheme of the present application: the adjusting assembly comprises a lead screw rotatably mounted on the baffle, the lead screw is movably mounted with a threaded sleeve threadedly matched with the lead screw, and the side wall of the threaded sleeve is fixed with a connecting plate fixedly connected with the limiting sleeve.

[0021] Compared with the prior art, the present application has the beneficial effects that: the auxiliary fan can assist in air supply to ensure that the main fan will not be damaged due to long-time high-load operation, in the initial state, the rotating speed regulating mechanism is controlled to move under the action of the adjusting assembly, at this time, the driving mechanism works and drives the rotating speed regulating mechanism to move, so that the air supply mechanism moves and drives the first fan blade to rotate, at this time, the auxiliary fan works and the main fan remains in the stopped state, when the auxiliary fan works for a certain time, the rotating speed regulating mechanism is controlled to move under the action of the adjusting assembly, at this time, the air supply mechanism moves and drives the second fan blade to rotate under the action of the driving mechanism through the rotating speed regulating mechanism, and the rotating speed of the first fan blade gradually decreases, when the rotating speed of the second fan blade reaches the maximum value, the first fan blade stops working, so that the auxiliary fan stops working after the main fan reaches the rated power. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Structure schematic view of one embodiment of the sulfuric acid production air supply system with main fan jump-stop automatic flow increase.

[0023] Figure 2 Structure schematic view of another angle of one embodiment of the sulfuric acid production air supply system with main fan jump-stop automatic flow increase.

[0024] Figure 3 For Figure 2 Structure enlarged schematic view of A in the middle.

[0025] Figure 4 Figure 1 is a schematic diagram of the connection relationship of the adjusting assembly, the speed regulating mechanism and the driving mechanism in one embodiment of the sulfuric acid production air supply system with automatic flow increase when the main air blower is stopped.

[0026] Figure 5 Figure 2 is a schematic diagram of the structure of part of the driving mechanism and part of the speed regulating mechanism in one embodiment of the sulfuric acid production air supply system with automatic flow increase when the main air blower is stopped.

[0027] Figure 6 Figure 3 is an exploded schematic diagram of part of the driving mechanism and part of the speed regulating mechanism in one embodiment of the sulfuric acid production air supply system with automatic flow increase when the main air blower is stopped.

[0028] Figure 7 Figure 4 is an exploded schematic diagram of the adjusting assembly and part of the speed regulating mechanism in one embodiment of the sulfuric acid production air supply system with automatic flow increase when the main air blower is stopped.

[0029] Figure 8 Figure 5 is a schematic diagram of the connection relationship of part of the air supply mechanism and part of the driving mechanism in one embodiment of the sulfuric acid production air supply system with automatic flow increase when the main air blower is stopped.

[0030] In the figure: 1, base; 2, fixed plate; 3, motor; 4, transmission rod; 5, rotating disc; 6, sliding groove; 7, sliding rod; 8, arc plate; 9, spring; 10, connecting rod; 11, first movable sleeve; 12, limiting sleeve; 13, second movable sleeve; 14, limiting rod; 15, limiting groove; 16, baffle; 17, screw rod; 18, threaded sleeve; 19, connecting plate; 20, first belt; 21, auxiliary air blower support; 22, first rotating rod; 23, first fan blade; 24, second belt; 25, main air blower support; 26, second rotating rod; 27, second fan blade; 28, flow guide pipe; 29, flow collecting pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] In addition, elements in the application can be referred to as "fixed" or "set" on another element, which can be directly on another element or can exist with a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or can exist with a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0033] Referring to Figures 1-8 In an embodiment of the application, a kind of main fan jump stop automatic flow increase of sulfuric acid production air supply system, comprising:

[0034] Base 1, the fixed plate 2 and the baffle 16 of symmetrical arrangement are installed on the base 1;

[0035] Referring to Figure 1 、 Figure 2 、 Figure 8 Auxiliary fan bracket 21, installed on the base 1, the base 1 is also fixed with main fan bracket 25, the auxiliary fan bracket 21 and the main fan bracket 25 are respectively provided with a plurality of No. 1 fan blade 23 and No. 2 fan blade 27 that are circumferentially equidistantly distributed, the fixed plate 2 is provided with air supply mechanism connected with the No. 1 fan blade 23 and the No. 2 fan blade 27, the air supply mechanism can drive the No. 1 fan blade 23 and the No. 2 fan blade 27 rotate, the air supply mechanism includes guide pipe 28 installed at the end of the auxiliary fan bracket 21 and the main fan bracket 25 respectively, the guide pipe 28 is fixed with the confluence pipe 29 connected with the guide pipe 28, the auxiliary fan bracket 21 and the main fan bracket 25 are provided with driven assembly connected with the drive mechanism, the driven assembly is connected with the No. 1 fan blade 23 and the No. 2 fan blade 27, wherein, the driven assembly includes No. 1 rotating rod 22 rotatably installed on the auxiliary fan bracket 21, the No. 1 rotating rod 22 is sleeved with No. 1 belt 20 connected with the drive mechanism, the main fan bracket 25 is rotatably installed with No. 2 rotating rod 26, the No. 2 rotating rod 26 is sleeved with No. 2 belt 24 connected with the drive mechanism, the No. 1 rotating rod 22 is fixedly connected with the No. 1 fan blade 23, and the No. 2 rotating rod 26 is fixedly connected with the No. 2 fan blade 27.

[0036] In detail, during the initial low-load operation period of start-up, the fan will run near its surge zone for 2-4 hours, which can cause significant damage. To prevent the main fan from malfunctioning and shutting down, an auxiliary fan needs to be used during the initial start-up phase to avoid damage to the main fan. When sulfuric acid production is required, the drive mechanism drives the first rotating rod 22 via the first belt 20, which in turn drives the first fan blade 23 to rotate. Air is then transported into the guide pipe 28 through the first fan blade 23. An inlet check valve is installed in the guide pipe 28 to ensure that the gas in the guide pipe 28 does not flow back. The air will be collected in the manifold 29 and transported to the sulfur incinerator. Once the air delivered by the first fan blade 23 reaches a certain amount, the main fan needs to be controlled to operate. At this time, the drive mechanism will drive the second belt 24 to move and drive the second rotating rod 26 to rotate. The second rotating rod 26 will also drive the second fan blade 27 to rotate and deliver the air to the guide pipe 28. At the same time, the speed of the first belt 20 will decrease, which will reduce the speed of the first fan blade 23. When the speed of the second rotating rod 26 reaches a certain value, the first belt 20 will stop moving, causing the first fan blade 23 to stop running. At this time, the main fan will supply air in full, and the auxiliary fan will stop running.

[0037] Please see Figures 1-6 , Figure 8 A drive mechanism is mounted on the fixed plate 2 and connected to the air supply mechanism. The drive mechanism can drive the first fan blade 23 and the second fan blade 27 to rotate through the air supply mechanism. The drive mechanism includes a motor 3 mounted on the fixed plate 2. A transmission rod 4 connected to the output shaft of the motor 3 is rotatably mounted on the fixed plate 2. A symmetrically arranged turntable 5 is movably mounted on the transmission rod 4. A sliding assembly connected to the turntable 5 is provided on the fixed plate 2. The sliding assembly is connected to the first belt 20 and the second belt 24. The transmission rod 4 is connected to the speed control mechanism. The sliding assembly includes multiple grooves 6 that are circumferentially distributed on the side of the turntable 5 away from the fixed plate 2. A sliding rod 7 is slidably mounted in the groove 6. An arc plate 8 is fixed to one end of the sliding rod 7 away from the groove 6. Two sets of arc plates 8 are respectively connected to the first belt 20 and the second belt 24. The sliding rod 7 is connected to the speed control mechanism.

[0038] It should be noted that during the initial startup phase, the rotation of the first fan blade 23 needs to be controlled. In the initial state, under the action of the speed control mechanism, the sliding rod 7 is positioned at the end of its stroke away from the slide groove 6, so as to maximize the distance between the arc plates 8. This controls the rotation of the turntable 5 connected to the first belt 20. When the motor 3 is working, it drives the transmission rod 4 to rotate, thereby driving the speed control mechanism to move. The speed control mechanism also drives one of the sliding rods 7 to rotate. Under the action of the sliding rod 7, the turntable 5 with the slide groove 6 is controlled to rotate. At the same time, the sliding rod 7 also drives the arc plate 8 to rotate, thereby driving the first belt 20 to move. Under the action of the first belt 20, the first rotating rod 22 and the first fan blade 23 are driven to rotate. As the auxiliary fan's running time reaches the set value, under the action of the speed control mechanism... The sliding rod 7 moves towards the groove 6 to reduce the distance between the arc plates 8. The first belt 20 will contract, reducing its speed and thus decreasing the rotation speed of the first rotating rod 22. The speed control mechanism also controls the other sliding rod 7 to move away from the groove 6 and drives it to rotate, thereby rotating the other turntable 5. The sliding rod 7 also controls the second belt 24 to stretch through the arc plate 8 and drives it to rotate, causing the second rotating rod 26 and the second fan blade 27 to rotate. As the speed control mechanism continues to move, the rotation speed of the second rotating rod 26 will increase until it reaches the required value. Then the first belt 20 stops moving, thus achieving the goal of stopping the auxiliary fan after the main fan reaches its rated power.

[0039] Also includes:

[0040] Please see Figures 1-7A speed control mechanism is disposed on the fixed plate 2 and connected to the drive mechanism. The speed control mechanism can adjust the speed of the first fan blade 23 and the second fan blade 27 through the drive mechanism, and control the movement state of the first fan blade 23 and the second fan blade 27. The speed control mechanism includes a limiting sleeve 12 movably mounted on the transmission rod 4. A first movable sleeve 11 is movably mounted on the transmission rod 4 and abuts against one end of the limiting sleeve 12. A second movable sleeve 13 is also movably mounted on the transmission rod 4 and abuts against the other end of the limiting sleeve 12. The fixed plate 2 is provided with a mechanism for connecting the first movable sleeve 11 and the second movable sleeve 27. The elastic component connected to the second movable sleeve 13 is connected to the sliding rod 7, and the limiting sleeve 12 is connected to the adjusting component. The elastic component includes limiting grooves 15 respectively formed on the inner walls of the first movable sleeve 11 and the second movable sleeve 13. The transmission rod 4 is fixed with limiting rods 14 that are symmetrically arranged and engage with the limiting grooves 15. The first movable sleeve 11 and the second movable sleeve 13 are respectively hinged with connecting rods 10 that are circumferentially distributed and hinged to the sliding rod 7. The transmission rod 4 is sleeved with springs 9 that abut against the first movable sleeve 11 and the second movable sleeve 13 respectively.

[0041] Furthermore, in the initial state, spring 9 is in a compressed state, causing movable sleeve 11 and movable sleeve 13 to abut against the two sides of limiting sleeve 12 respectively. Under the action of the adjusting component, the distance between limiting sleeve 12 and belt 20 is brought closer. The limiting groove 15 on the inner wall of movable sleeve 11 engages with limiting rod 14, while the limiting groove 15 on the inner wall of movable sleeve 13 is separated from limiting rod 14. When transmission rod 4 rotates, it drives limiting rod 14 to rotate. Due to the interaction between limiting rod 14 and limiting groove 15... The engagement causes the first movable sleeve 11 to rotate. Because the limiting groove 15 inside the second movable sleeve 13 is separated from the limiting rod 14, the second movable sleeve 13 will not rotate. The first movable sleeve 11 will also drive the connecting rod 10 to move, thereby driving the sliding rod 7 to rotate. The sliding rod 7 will also drive the turntable 5 and the arc plate 8 to rotate, causing the first belt 20 to move. At this time, the auxiliary fan will start working. After the auxiliary fan has worked for a certain period of time, the main fan needs to be controlled to work. At this time, under the action of the adjusting component, the limiting sleeve is driven. 12 moves towards the other turntable 5 and drives the second movable sleeve 13 to move along the length of the transmission rod 4. The second movable sleeve 13 also compresses the spring 9. At the same time, the spring 9, which is in contact with the first movable sleeve 11, is released elastically and drives the first movable sleeve 11 to always be in contact with the limiting sleeve 12. Under the action of the first movable sleeve 11, the sliding rod 7 is driven to slide into the slide groove 6 through the connecting rod 10, so that the distance between the arc plates 8 is reduced, thereby reducing the rotation speed of the first rotating rod 22. At the same time, when the second movable sleeve 13... When the limiting groove 15 on the inner wall moves to the position where it engages with the limiting rod 14, the second movable sleeve 13 will also drive another sliding rod 7 to move in the direction away from the slide groove 6 through the connecting rod 10, thereby increasing the distance between the arc plates 8 and increasing the rotation speed of the second rotating rod 26. When the rotation speed of the second rotating rod 26 reaches a certain value, the limiting groove 15 on the inner wall of the first movable sleeve 11 separates from the limiting rod 14, causing the first rotating rod 22 to stop rotating, thereby ensuring that the auxiliary fan stops working after the main fan power reaches the required level.

[0042] Please see Figure 1 , Figure 2 , Figure 4 , Figure 7 An adjustment component is disposed on the baffle 16 and connected to the speed control mechanism. The adjustment component can drive the drive mechanism to move through the speed control mechanism. The adjustment component includes a lead screw 17 rotatably mounted on the baffle 16. A threaded sleeve 18 that is threadedly engaged with the lead screw 17 is movably mounted on the lead screw 17. A connecting plate 19 that is fixedly connected to the limiting sleeve 12 is fixedly attached to the side wall of the threaded sleeve 18.

[0043] Furthermore, in the initial state, under the action of the limiting sleeve 12, the distance between the first movable sleeve 11 and the first belt 20 is minimized, and the distance between the second movable sleeve 13 and the second belt 24 is maximized. Since the lead screw 17 has a self-locking function, it ensures that the limiting sleeve 12 will not rotate. When it is necessary to control the main fan to work, the lead screw 17 rotates, driving the threaded sleeve 18 to move, thereby driving the second movable sleeve 13 to move towards the second belt 24. At the same time, the spring 9 that abuts against the first movable sleeve 11 is released elastically, and controls the first movable sleeve 11 to always abut against the limiting sleeve 12. When the limiting groove 15 opened in the inner wall of the second movable sleeve 13 engages with the limiting rod 14, the second belt 24 moves and drives the second rotating rod 26 to rotate. When the rotation speed of the second rotating rod 26 reaches a certain value, the limiting groove 15 opened in the first movable sleeve 11 separates from the limiting rod 14, causing the first rotating rod 22 to stop rotating.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sulfuric acid production air supply system with automatic flow booster in case of main fan tripping, comprising: The base (1) is equipped with a fixing plate (2) and a baffle (16) arranged symmetrically. An auxiliary fan bracket (21) is installed on the base (1), and a main fan bracket (25) is also fixed on the base (1). Multiple first fan blades (23) and second fan blades (27) are respectively arranged on the auxiliary fan bracket (21) and the main fan bracket (25) in a circumferentially equidistant manner. A drive mechanism that can drive the first fan blade (23) and the second fan blade (27) to rotate; Its characteristic is that it further includes: The speed control mechanism is set on the fixed plate (2) and connected to the drive mechanism. The speed control mechanism can adjust the speed of the first fan blade (23) and the second fan blade (27) through the drive mechanism and control the motion state of the first fan blade (23) and the second fan blade (27). An adjustment component is disposed on the baffle (16) and connected to the speed control mechanism. The adjustment component can drive the drive mechanism to move through the speed control mechanism. The driving mechanism includes a motor (3) mounted on the fixed plate (2), a transmission rod (4) rotatably mounted on the fixed plate (2) and connected to the output shaft of the motor (3), a turntable (5) symmetrically arranged on the transmission rod (4), a sliding assembly connected to the turntable (5) on the fixed plate (2), and the transmission rod (4) connected to the speed control mechanism; The sliding assembly includes a plurality of grooves (6) that are opened on the side of the turntable (5) away from the fixed plate (2) and are distributed equidistantly in a circle. A sliding rod (7) is slidably installed in the groove (6). An arc plate (8) is fixed to one end of the sliding rod (7) away from the groove (6). The sliding rod (7) is connected to the speed control mechanism. The speed control mechanism includes a limiting sleeve (12) movably mounted on the transmission rod (4), a first movable sleeve (11) movably mounted on the transmission rod (4) and a second movable sleeve (13) movably mounted on the transmission rod (4) and abutting against the other end of the limiting sleeve (12), an elastic component connected to the first movable sleeve (11) and the second movable sleeve (13) is provided on the fixing plate (2), the elastic component is connected to the sliding rod (7), and the limiting sleeve (12) is connected to the adjusting component.

2. The sulfuric acid production air supply system with automatic flow increase upon main fan tripping as described in claim 1, characterized in that, The fixed plate (2) is provided with an air supply mechanism that is connected to the first fan blade (23) and the second fan blade (27); The air supply mechanism includes a guide pipe (28) installed at the ends of the auxiliary fan bracket (21) and the main fan bracket (25), respectively. A manifold (29) connected to the guide pipe (28) is fixed on the guide pipe (28). A driven component connected to the drive mechanism is provided on the auxiliary fan bracket (21) and the main fan bracket (25). The driven component is connected to the first fan blade (23) and the second fan blade (27). The driven component includes a first rotating rod (22) rotatably mounted on the auxiliary fan bracket (21), a first belt (20) connected to the drive mechanism is sleeved on the first rotating rod (22), a second rotating rod (26) rotatably mounted on the main fan bracket (25), a second belt (24) connected to the drive mechanism is sleeved on the second rotating rod (26), the first rotating rod (22) is fixedly connected to the first fan blade (23), and the second rotating rod (26) is fixedly connected to the second fan blade (27).

3. The sulfuric acid production air supply system with automatic flow increase upon main fan tripping as described in claim 2, characterized in that, The sliding component is connected to the first belt (20) and the second belt (24), and the two sets of arc plates (8) are respectively connected to the first belt (20) and the second belt (24).

4. The sulfuric acid production air supply system with automatic flow increase upon main fan tripping as described in claim 3, characterized in that, The elastic component includes limiting grooves (15) respectively opened on the inner walls of the first movable sleeve (11) and the second movable sleeve (13), and limiting rods (14) fixed on the transmission rod (4) in a symmetrical arrangement and engaging with the limiting grooves (15). Connecting rods (10) are respectively hinged on the first movable sleeve (11) and the second movable sleeve (13) in a circumferentially equidistant arrangement and hinged to the sliding rod (7). Springs (9) are sleeved on the transmission rod (4) and respectively abut against the first movable sleeve (11) and the second movable sleeve (13).

5. The sulfuric acid production air supply system with automatic flow increase upon main fan tripping as described in claim 1, characterized in that, The adjustment assembly includes a lead screw (17) rotatably mounted on the baffle (16), a threaded sleeve (18) threadedly engaged with the lead screw (17) is movably mounted on the lead screw (17), and a connecting plate (19) fixedly connected to the limiting sleeve (12) is fixedly attached to the side wall of the threaded sleeve (18).

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