Device for online replacement of desulfurizing agent for cross-flow calcium-based fixed bed desulfurization system

Abstract

The invention discloses a device for online replacement of a desulfurizing agent for a cross-flow calcium-based fixed bed desulfurization system, relates to the technical field of cross-flow calcium-based fixed bed desulfurization systems, and solves the technical problems that hoisting ton bags are tedious and dangerous to replace, and production continuity is affected when no standby fixed bed desulfurization system is used for material replacement. Comprising a fixed bed unit, and the fixed bed unit comprises a desulfurizer layer arranged in the fixed bed unit and a shutter ventilation window installed on the inner side of the desulfurizer layer; the conveying unit is positioned above the fixed bed unit and is used for replacing an internal desulfurizing agent; on-line refueling of the cross-flow calcium-based fixed bed desulfurization system is achieved without a standby fixed bed unit, the problems that a standby fixed bed desulfurization system is high in cost and large in occupied area are solved, the problem that production continuity is affected during refueling of a non-standby fixed bed desulfurization system is solved, meanwhile, the replacement amount of a desulfurizing agent is convenient to regulate and control, and the production efficiency is improved. And when the desulfurizing agent is replaced, the short circuit phenomenon of the flue gas is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of cross-flow calcium-based fixed bed desulfurization systems, and in particular is a device for online replacement of desulfurizers in cross-flow calcium-based fixed bed desulfurization systems. Background Art

[0002] Calcium-based fixed bed desulfurization technology has a place in the desulfurization process with its streamlined equipment, convenient control and wide temperature adaptability. Depending on whether it is equipped with a spare fixed bed unit, the calcium-based fixed bed desulfurization system can be divided into fixed bed desulfurization towers with online and offline replacement modes.

[0003] In some existing systems, whether online or offline, the loading and replacement process of the desulfurizer relies on lifting equipment such as electric hoists and truck cranes to transport the desulfurizer to the top of the tower. The ton bags are then opened manually to allow the desulfurizer to fall into the tower naturally. Manual operation to open the ton bags at the two desulfurization feed ports is dangerous, and the desulfurizer feed amount cannot be adjusted at any time, resulting in a relatively long desulfurizer replacement cycle and inaccurate desulfurizer replacement amount. For a desulfurization system without a spare fixed bed unit, material replacement must sacrifice production time. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a device for online replacement of desulfurizer in a cross-flow calcium-based fixed bed desulfurization system.

[0005] A device for online replacement of desulfurizer in a cross-flow calcium-based fixed bed desulfurization system, comprising:

[0006] A fixed bed unit, the fixed bed unit comprising a desulfurizer layer disposed inside, a louvered air-permeable window installed inside the desulfurizer layer, and a closed wall installed on top of the louvered air-permeable window;

[0007] A conveying unit located above the fixed bed unit and used for replacing the internal desulfurizer, the conveying unit includes two discharge hoppers installed on the top of each fixed bed unit, a horizontal conveyor for conveying the desulfurizer horizontally to the discharge hopper, a push plate for simultaneously discharging the desulfurizer to the two discharge hoppers, and a weighing discharge valve for weighing the desulfurizer to be discharged;

[0008] A loading unit is located vertically in front of the conveying unit and provides desulfurization agent to the horizontal conveyor.

[0009] Preferably, the fixed bed unit further comprises a smoke inlet and a smoke outlet arranged on the front surface of the fixed bed unit, wherein the smoke outlet is located above the smoke inlet and below the closed wall.

[0010] Preferably, an external flue is opened between the outer side of the desulfurizer layer and the inner wall of the fixed bed unit, an internal flue is opened inside the louvered air window, a flue partition is arranged between the flue gas inlet and the flue gas outlet, and a desulfurization feed port connected to the discharge hopper is arranged on the top of the fixed bed unit.

[0011] Preferably, the conveying unit also includes an enclosing box that surrounds the horizontal conveyor, and a pushing cylinder that drives the pushing plate to move left and right is arranged on the outside of the enclosing box. A second unloading pipe and a first unloading pipe connected to two unloading hoppers are respectively arranged on the left and right sides of the enclosing box.

[0012] Preferably, a frame is arranged between the front and rear surfaces of the surrounding box and the fixed bed unit, and auxiliary components are arranged between the first material discharge pipe and the second material discharge pipe on both sides of the push plate.

[0013] Preferably, the auxiliary component comprises a material-shifting soft rod installed on the side of the push plate, the outer end of the material-shifting soft rod extends into the first material discharge pipe, and a load-bearing spherical block is provided at the outer end of the material-shifting soft rod.

[0014] Preferably, the feeding unit includes a vertical loader, a slanted discharge port for feeding materials to a horizontal conveyor is arranged on the left side of the upper end of the vertical loader, a material temporary storage bucket is arranged on the right side of the lower end of the vertical loader, closed chutes are arranged at the bottom of the material temporary storage bucket and the right side of the vertical loader, and a material discharging component for discharging the desulfurizer inside the closed chute is arranged inside the material temporary storage bucket.

[0015] Preferably, the material-push-away component comprises a driving cylinder vertically mounted on the inner wall of the temporary material storage bucket, the lower end of the piston rod inside the driving cylinder is connected to a U-shaped lifting frame, a material-push-away plate is arranged on the inner side of the lower end of the lifting frame, and the two are rotatably connected via a rotating shaft.

[0016] Preferably, the rotating shaft and the left side of the material-diverting plate are both provided with fixed convex plates, and a metal spring is provided between the two fixed convex plates.

[0017] Preferably, notches for the push plate to move are provided at positions on both sides of the horizontal conveyor corresponding to the first unloading pipe.

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

[0019] (1) The present invention realizes online material replacement of a cross-flow calcium-based fixed bed desulfurization system without a spare fixed bed unit, which not only solves the problem of high cost and large space occupied by a desulfurization system with a spare fixed bed, but also eliminates the problem of affecting production continuity when replacing materials in a desulfurization system without a spare fixed bed. At the same time, the replacement amount of the desulfurizer is easy to control, and there will be no short-circuiting phenomenon in the flue gas when the desulfurizer is replaced.

[0020] (2) The auxiliary components designed in the present invention can push the desulfurizer in the first discharge pipe and the second discharge pipe respectively during the left and right movement of the push plate, thereby avoiding blockage of the desulfurizer in the pipe and increasing the smoothness of the desulfurizer discharge.

[0021] (3) The present invention uses a designed material-pickling component so that the desulfurizer in the temporary material storage bucket will not be blocked when it enters the closed chute, thereby ensuring the continuity and amount of desulfurizer feeding and increasing the continuity of the subsequent supply of desulfurizer to the fixed bed unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an online desulfurization agent replacement device for a cross-flow calcium-based fixed bed desulfurization system of the present invention;

[0023] Figure 2 For the present invention Figure 1 The left side structural diagram of the online desulfurization agent replacement device of the medium cross-flow calcium-based fixed bed desulfurization system;

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the internal structure of the conveying unit;

[0025] Figure 4 For the present invention Figure 1 A longitudinal cross-sectional view of a fixed bed unit;

[0026] Figure 5 For the present invention Figure 3 Structural diagram of auxiliary components;

[0027] Figure 6 For the present invention Figure 1 Schematic diagram of the internal structure of the feeding unit;

[0028] Figure 7 For the present invention Figure 6 The structural schematic diagram of the middle material shifting component;

[0029] In the figure: 100, fixed bed unit; 101, external flue; 102, desulfurizing agent layer; 103, louvered ventilation window; 104, closed wall; 105, flue gas inlet; 106, flue gas outlet; 107, desulfurization feed port; 108, internal flue; 109, flue partition; 200, conveying unit; 201, surrounding box; 202, horizontal conveyor; 203, unloading hopper; 204, first unloading pipe; 205, second unloading pipe; 206, push plate; 207, push cylinder; 2 08. Auxiliary components; 2081. Material-discharging rod; 2082. Load-bearing spherical block; 2083. Mounting ring; 209. Frame; 210. Weighing discharge valve; 300. Feeding unit; 301. Vertical feeder; 302. Inclined discharge port; 303. Material temporary storage bucket; 304. Closed chute; 305. Material-discharging component; 3051. Driving cylinder; 3052. Lifting frame; 3053. Material-discharging plate; 3054. Rotating shaft; 3055. Fixed convex plate; 3056. Metal spring. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] See also Figure 1 - Figure 4 The present application provides a device for online replacement of desulfurization agent in a cross-flow calcium-based fixed bed desulfurization system, comprising:

[0033] The fixed bed unit 100 has different numbers according to the amount of flue gas to be treated. The fixed bed unit 100 includes a desulfurizer layer 102 disposed inside, a louvered air-permeable window 103 installed inside the desulfurizer layer 102, and a closed wall 104 installed on the top of the louvered air-permeable window 103. The closed wall 104 provides a prerequisite for realizing online material replacement of the cross-flow calcium-based fixed bed desulfurization system without a spare fixed bed unit 100, thereby avoiding the phenomenon that the flue gas will short-circuit when the desulfurizer is replaced;

[0034] A conveying unit 200 located above the fixed bed unit 100 and used to replace the internal desulfurizer, the conveying unit 200 includes two discharge hoppers 203 installed on the top of each fixed bed unit 100, a horizontal conveyor 202 for conveying the desulfurizer to the discharge hopper 203, a push plate 206 for simultaneously discharging the desulfurizer to the two discharge hoppers 203, and a weighing discharge valve 210 for weighing the desulfurizer to be discharged;

[0035] The loading unit 300 , which is vertically located in front of the conveying unit 200 and provides the desulfurization agent to the horizontal conveyor 202 , can vertically convey the desulfurization agent that needs to be replaced upward to the horizontal conveyor 202 .

[0036] In the present embodiment, preferably, the fixed bed unit 100 further includes a flue gas inlet 105 and a flue gas outlet 106 arranged on the front surface of the fixed bed unit 100, the flue gas outlet 106 is located above the flue gas inlet 105, the flue gas outlet 106 is located below the closed wall 104, and the upper end of the closed wall 104 is fixed to the inner wall of the upper end of the fixed bed unit 100, and the lower end of the closed wall 104 is fixed to the upper end of the louvered air permeable window 103, so as to avoid the phenomenon of flue gas short circuit when replacing the desulfurizer, an outer flue 101 is opened between the outer side of the desulfurizer layer 102 and the inner wall of the fixed bed unit 100, an inner flue 108 is opened on the inner side of the louvered air permeable window 103, a flue partition 109 is arranged between the flue gas inlet 105 and the flue gas outlet 106, and a desulfurization feed port 107 connected to the discharge hopper 203 is arranged at the top of the fixed bed unit 100.

[0037] In the case of no spare layer and closed wall 104, when the fixed bed unit 100 opens the desulfurization feed port 107 to add material during operation, because the process from the desulfurization feed port 107 to the flue gas outlet 106 is short and the resistance loss is small, a large amount of air that does not need to be desulfurized will enter the desulfurization system from the desulfurization feed port 107 along the shortest path, and mix with the sulfur-containing flue gas to be purified. Under the action of the desulfurization system fan, it is discharged into the atmosphere through the flue gas outlet 106, resulting in a large amount of air entering the desulfurization system while the flow rate of the desulfurization system remains unchanged. The amount of flue gas that needs to be treated in the desulfurization system becomes less, which breaks the flow balance of the entire desulfurization system and the desulfurization system outlet Positive pressure may occur, which may even affect the normal production of the entire desulfurization system; secondly, after a large amount of air enters the desulfurization system, the oxygen content of the mixed flue gas increases, and the converted sulfur dioxide concentration becomes larger, and there is even a risk of exceeding the emission standard, and the efficiency of the desulfurization system is reduced; finally, after the normal temperature air enters the desulfurization system and mixes with the flue gas to be desulfurized, the flue gas temperature will drop to the dew point temperature, aggravating the corrosion of the desulfurization system. The purpose of adding the closed wall 104 is to increase the flue gas flow from the desulfurization feed port 107 to the flue gas outlet 106, increase the resistance loss, and reduce the amount of air entering the desulfurization system through the desulfurization feed port 107 during normal operation of the desulfurization system, thereby reducing the impact on the entire desulfurization system.

[0038] In this embodiment, preferably, the conveying unit 200 further includes a surrounding box 201 surrounding the horizontal conveyor 202. Figure 6The inclined discharge port 302 will penetrate the surrounding box 201 and extend to the top of the horizontal conveyor 202. A pushing cylinder 207 for driving the pushing plate 206 to move left and right is arranged on the outside of the surrounding box 201. The second discharge pipe 205 and the first discharge pipe 204 connected to the two discharge hoppers 203 are respectively arranged on the left and right sides of the surrounding box 201. The second discharge pipe 205 and the first discharge pipe 204 are both inclined downward to facilitate the delivery of the desulfurizer into the discharge hopper 203.

[0039] In summary, when in use, the loading unit 300 is used to transport the desulfurizer to be replaced to the horizontal conveyor 202, and the horizontal conveyor 202 moves to transport the desulfurizer on it to the position of each fixed bed unit 100. Each fixed bed unit 100 corresponds to a push plate 206. As the horizontal conveyor 202 works, the push cylinder 207 works at the same time. The piston rod inside the push cylinder 207 is extended and retracted to drive the push plate 206 to move left and right on the conveyor belt surface. When the push plate 206 moves to the right, the conveyor belt The desulfurizer on the conveyor belt is pushed to the right into the first discharge pipe 204, and falls into the discharge hopper 203 along the inclined first discharge pipe 204, and the piston rod inside the push cylinder 207 retracts to drive the push plate 206 to move to the left, pushing the desulfurizer on the conveyor belt to the left into the second discharge pipe 205, and moves downward along the inclined surface of the second discharge pipe 205 and falls into the discharge hopper 203. During the left and right movement of the push plate 206, the conveyor belt always moves to ensure that the desulfurizer can always be delivered during the movement of the push plate 206. The desulfurizer is located at the push plate 206, and can supply the desulfurizer to the two discharge hoppers 203 at the same time. When the weight of the desulfurizer in the discharge hopper 203 reaches the set weight, the weighing discharge valve 210 is opened, and the two discharge hoppers 203 replenish the desulfurizer to the fixed bed unit 100 at the same time. Compared with manually opening two ton bags to discharge the material, it reduces the danger, and the amount of desulfurizer discharged is controllable. When the desulfurizer in the discharge hopper 203 is discharged, the weighing discharge valve 210 works again to close the discharge hopper 203, which is convenient for the next replacement of the desulfurizer. After the desulfurization agent in the fixed bed unit 100 is replaced, the desulfurized flue gas enters the fixed bed unit 100 from the flue gas inlet 105 under the action of the desulfurization booster fan, passes through the louvered air permeable window 103 horizontally in the inner flue 108 to enter the desulfurizer layer 102, and enters the outer flue 101 after desulfurization in the desulfurizer layer 102, passes through the desulfurizer layer 102 and the louvered air permeable window 103 upward for secondary desulfurization, and then returns to the inner flue 108, and is discharged from the fixed bed unit 100 through the flue gas outlet 106, completing the desulfurization process.

[0040] Embodiment 2

[0041] Reference Figure 5 , which is the second embodiment of the present invention.

[0042] In this embodiment, preferably, a frame 209 is arranged between the front and rear surfaces of the surrounding box body 201 and the fixed bed unit 100, and auxiliary components 208 are arranged between the two sides of the push plate 206 and the first unloading pipe 204 and the second unloading pipe 205, respectively. By using the auxiliary components 208, the desulfurizer in the first unloading pipe 204 and the second unloading pipe 205 can be pushed respectively during the left and right movement of the push plate 206 to avoid blockage of the desulfurizer in the pipe and increase the smoothness of the desulfurizer unloading. The auxiliary components 208 include a bracket installed on the side of the push plate 206. The material-diverting soft rod 2081 can be a silicone rod, which is both elastic and has a certain hardness. The lengths of the material-diverting soft rod 2081 in the first material discharge pipe 204 and the second material discharge pipe 205 are inconsistent, and can be adapted to the corresponding material discharge pipes, so as to facilitate movement in the inclined pipes. The outer end of the material-diverting soft rod 2081 extends into the first material discharge pipe 204, and the outer end of the material-diverting soft rod 2081 is provided with a load-bearing spherical block 2082, and the upper surface of the pushing plate 206 is provided with a mounting ring 2083 connected to the internal piston rod of the pushing cylinder 207, so as to facilitate the disassembly and assembly of the two.

[0043] In summary, when the push plate 206 moves to the right, it will drive the right-side material-discharging soft rod 2081 to move in the first material discharge pipe 204, and drive the load-bearing spherical block 2082 to move in the pipe, which will play a role in pushing and preventing blockage of the desulfurizer in the pipe. Similarly, when the push plate 206 moves to the left, it will drive the left-side material-discharging soft rod 2081 to move in the second material discharge pipe 205, and the load-bearing spherical block 2082 will move along the inclined pipe under its own gravity, which is convenient for discharging the desulfurizer in the pipe.

[0044] Embodiment 3

[0045] Reference Figure 6 and Figure 7 , which is the third embodiment of the present invention.

[0046] In this embodiment, preferably, the feeding unit 300 includes a vertical loader 301, and an inclined discharge port 302 for feeding materials to the horizontal conveyor 202 is arranged on the left side of the upper end of the vertical loader 301, and a material temporary storage bucket 303 is arranged on the right side of the lower end of the vertical loader 301. A closed chute 304 is arranged at the bottom of the material temporary storage bucket 303 and the right side of the vertical loader 301, and a material discharging component 305 for discharging the desulfurizer inside the closed chute 304 is arranged inside the material temporary storage bucket 303.

[0047] In this embodiment, preferably, the material-pickling component 305 includes a driving cylinder 3051 vertically mounted on the inner wall of the temporary material storage bucket 303, and the driving cylinder 3051 includes a driving cylinder and a shell mounted on the outer side of the driving cylinder, and the shell is fixed to the inner wall of the temporary material storage bucket 303 and protects the driving cylinder. By using the material-pickling component 305, the desulfurizer in the temporary material storage bucket 303 enters the closed chute 304 without being blocked, thereby ensuring the continuity and amount of desulfurizer feeding, and increasing the continuity of the subsequent supply of desulfurizer to the fixed bed unit 100. The lower end of the piston rod inside the driving cylinder 3051 is connected to the U-shaped lifting frame. 3052 is connected, and a material stripping plate 3053 is arranged on the inner side of the lower end of the lifting frame 3052, and the two are rotatably connected by a rotating shaft 3054. The lower end of the material stripping plate 3053 is arc-shaped, which is convenient for fitting the inner wall of the closed chute 304. Fixed convex plates 3055 are arranged on the left side of the rotating shaft 3054 and the material stripping plate 3053, and a metal spring 3056 is arranged between the two fixed convex plates 3055. Sufficient space for elastic deformation is left between the metal spring 3056 and the inner wall of the closed chute 304. The initial position of the material stripping plate 3053 is not vertical, but tilted to the left, which is convenient for adapting to the shape of the closed chute 304.

[0048] In this embodiment, preferably, notches for the movement of the push plate 206 are opened at positions on both sides of the horizontal conveyor 202 corresponding to the first discharge pipe 204. Similarly, the first discharge pipe 204 and the second discharge pipe 205 both penetrate the surrounding box 201 and do not affect the desulfurizer on the horizontal conveyor 202 from entering the discharge pipe.

[0049] In summary, the desulfurizer can be put into storage from the top of the material temporary storage bucket 303. When the desulfurizer needs to be transported, the vertical feeder 301 works to gradually transport the desulfurizer in the closed chute 304 upward, and the desulfurizer in the material temporary storage bucket 303 enters the closed chute 304 for replenishment. During the replenishment process, the cylinder 3051 is driven to work, and the internal piston rod drives the lifting frame 3052 to move downward, driving the material stripping plate 3053 to move downward, and the lower end of the material stripping plate 3053 is attached to the inner wall of the closed chute 304 and rotates around the rotating shaft 3054, and the rotation of the material stripping plate 3053 also moves with the lifting frame 305 2 moves along the inner wall of the closed chute 304 to play a role in shifting the desulfurizer in the closed chute 304. A cylindrical rod can also be set between the lower ends of the two shifting plates 3053 to increase the shifting area. The metal spring 3056 gradually deforms. When the lifting frame 3052 moves upward with the piston rod, the metal spring 3056 recovers its elasticity and drives the shifting plate 3053 to move upward and reset, which is convenient for next use. During the whole process, the shifting plate 3053 can always shift the desulfurizer in the closed chute 304 to prevent the desulfurizer from being retained in the closed chute 304 and increase the continuity of desulfurizer feeding.

[0050] Embodiment 4

[0051] This embodiment is obtained by combining the first embodiment, the second embodiment and the third embodiment.

[0052] When in use, the desulfurizer is temporarily stored by the loading unit 300 and transported upward to the top of the fixed bed unit 100, and then transported to the top of each fixed bed unit 100 by the transport unit 200, the desulfurizer delivery amount is regulated, and the desulfurizer of appropriate weight is put into the fixed bed unit 100 for replacement.

[0053] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A device for online replacement of desulfurizer in a cross-flow calcium-based fixed bed desulfurization system, characterized in that: include: A fixed bed unit (100), the fixed bed unit (100) comprising a desulfurizing agent layer (102) disposed inside, a louvered air-permeable window (103) installed inside the desulfurizing agent layer (102), and a closed wall (104) installed on top of the louvered air-permeable window (103); A conveying unit (200) located above the fixed bed unit (100) and used to replace the internal desulfurizer, the conveying unit (200) comprising two discharge hoppers (203) installed on the top of each fixed bed unit (100), a horizontal conveyor (202) for conveying the desulfurizer horizontally to the discharge hoppers (203), a push plate (206) for simultaneously discharging the desulfurizer to the two discharge hoppers (203), and a weighing discharge valve (210) for weighing the desulfurizer to be discharged; A loading unit (300) is vertically located in front of the conveying unit (200) and supplies a desulfurizing agent to the horizontal conveyor (202).

2. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 1 is characterized in that: The fixed bed unit (100) further comprises a smoke inlet (105) and a smoke outlet (106) arranged on the front surface of the fixed bed unit (100), wherein the smoke outlet (106) is located above the smoke inlet (105), and the smoke outlet (106) is located below the closed wall (104).

3. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 2 is characterized in that: An external flue (101) is provided between the outer side of the desulfurizing agent layer (102) and the inner wall of the fixed bed unit (100), an internal flue (108) is provided inside the louvered air permeable window (103), a flue partition (109) is provided between the flue gas inlet (105) and the flue gas outlet (106), and a desulfurization feed port (107) connected to the discharge hopper (203) is provided at the top of the fixed bed unit (100).

4. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 1 is characterized in that: The conveying unit (200) further comprises an enclosing box (201) enclosing the horizontal conveyor (202); a pushing cylinder (207) for driving a pushing plate (206) to move left and right is arranged on the outside of the enclosing box (201); and a second unloading pipe (205) and a first unloading pipe (204) connected to two discharge hoppers (203) are respectively arranged on the left and right sides of the enclosing box (201).

5. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 4 is characterized in that: A frame (209) is provided between the front and rear surfaces of the surrounding box (201) and the fixed bed unit (100), and auxiliary components (208) are provided between the first material discharge pipe (204) and the second material discharge pipe (205) on both sides of the push plate (206).

6. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 5 is characterized in that: The auxiliary component (208) comprises a material-moving soft rod (2081) installed on the side of the push plate (206), the outer end of the material-moving soft rod (2081) extends into the first material discharge pipe (204), and a load-bearing spherical block (2082) is provided at the outer end of the material-moving soft rod (2081).

7. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 1 is characterized in that: The feeding unit (300) comprises a vertical feeding machine (301), the upper left side of the vertical feeding machine (301) is provided with an inclined feeding port (302) for feeding materials to a horizontal conveyor (202), the lower right side of the vertical feeding machine (301) is provided with a temporary material storage hopper (303), the bottom of the temporary material storage hopper (303) and the right side of the vertical feeding machine (301) are provided with a closed chute (304), and the interior of the temporary material storage hopper (303) is provided with a material discharging component (305) for discharging the desulfurizing agent in the closed chute (304).

8. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 7 is characterized in that: The material-moving component (305) comprises a driving cylinder (3051) vertically mounted on the inner wall of the temporary material storage bucket (303); the lower end of the piston rod inside the driving cylinder (3051) is connected to a U-shaped lifting frame (3052); a material-moving plate (3053) is arranged on the inner side of the lower end of the lifting frame (3052), and the two are rotatably connected via a rotating shaft (3054).

9. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 8, characterized in that: The rotating shaft (3054) and the left side of the material-shifting plate (3053) are both provided with a fixed convex plate (3055), and a metal spring sheet (3056) is provided between the two fixed convex plates (3055).

10. The device for online replacement of desulfurizing agent in a cross-flow calcium-based fixed bed desulfurization system according to claim 1, characterized in that: Notches for the push plate (206) to move are provided at positions on both sides of the horizontal conveyor (202) corresponding to the first material discharge pipe (204).

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