Activated carbon desulfurization and denitrification tower

Abstract

The invention relates to the technical field of tail gas treatment, in particular to an activated carbon desulfurization and denitrification tower which comprises a tower body of a thin-wall structure, an output port is formed in the top of the tower body, an input port is formed in the bottom of the tower body, and the interior of the tower body is used for containing activated carbon. Activated carbon particles located at the bottom of the carbon bed layer are circularly transferred to the top of the carbon bed layer in a reciprocating mode, and when the cold water spray head sprays cold water to the carbon bed layer from the upper portion for cooling, the activated carbon particles moving to the top of the carbon bed layer from the bottom of the carbon bed layer can rapidly dissipate heat. Therefore, spontaneous combustion or burning of the activated carbon particles at the bottom of the carbon bed layer due to insufficient heat dissipation efficiency can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, and in particular to an activated carbon desulfurization and denitrification tower. Background Art

[0002] Among the existing tail gas treatment technologies, activated carbon adsorption has the advantages of high desulfurization and denitrification efficiency, low investment, and low operating temperature, and is considered to be the most promising desulfurization and denitrification method. However, since activated carbon is flammable and the adsorption of SO2 by activated carbon is accompanied by heat release, the temperature of the activated carbon bed in the adsorption tower is easily exceeded in the whole or part of the safe range, causing spontaneous combustion of activated carbon and causing production safety problems.

[0003] At present, the method of inhibiting the spontaneous combustion of activated carbon includes cooling the activated carbon bed or cooling the exhaust gas, wherein the activated carbon bed is cooled by spraying cold water from above the activated carbon bed through a nozzle, and the cold water moves from the top of the carbon bed to the bottom of the carbon bed along the gaps between the activated carbon particles under the action of gravity, thereby cooling the entire carbon bed. However, in the actual production process, the activated carbon particles at the bottom of the carbon bed will be subjected to the gravity of the upper carbon bed. Under the action of gravity, the activated carbon particles at the bottom of the carbon bed will become compact, and the gaps between the activated carbon particles will also become smaller. After the gaps become smaller, the flow rate of the exhaust gas through the bottom of the carbon bed decreases, and the passing time becomes longer, resulting in a large amount of exhaust gas gathering between the activated carbon particles at the bottom of the carbon bed, causing a large amount of heat to be generated at the bottom of the carbon bed. In addition, the gaps between the activated carbon particles at the bottom of the charcoal bed become smaller, which hinders the inflow of cold water. Cold water has difficulty entering the bottom of the charcoal bed, resulting in reduced cooling efficiency of the cold water on the bottom of the charcoal bed. When the heat growth rate increases and the cooling efficiency decreases, the heat dissipation effect of the bottom of the charcoal bed is greatly reduced. The large amount of heat accumulation can easily cause local spontaneous combustion or burns of the activated carbon particles at the bottom of the charcoal bed, which will not only cause production safety problems, but the burned activated carbon particles cannot be recycled, increasing the cost of exhaust gas treatment. Summary of the invention

[0004] The purpose of the present invention is to solve the disadvantage of local burning of activated carbon particles at the bottom of the activated carbon bed in the prior art, and to propose an activated carbon desulfurization and denitrification tower.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An activated carbon desulfurization and denitrification tower is designed, comprising a tower body with a thin-wall structure, an output port is arranged on the top of the tower body, an input port is arranged on the bottom of the tower body, the inside of the tower body is used to hold activated carbon, an inverted V-shaped isolation net is fixedly connected to the bottom side of the inside of the tower body, the isolation net completely covers the output port, two thin-walled shells are vertically fixedly connected inside the tower body, the two shells are symmetrically distributed on both sides of the input port, and the shells are located above the isolation net, inclined guide plates are fixedly connected on opposite sides of the two shells, and a feeding structure is provided between the outer wall of the shell and the inner wall of the tower body, so as to transport the activated carbon at the bottom of the tower body upward.

[0007] Preferably, the feeding structure includes a plurality of feeding pipes, the feeding pipes are vertically fixed between the outer wall of the shell and the inner wall of the tower body, and a feeding screw is rotatably installed in the feeding pipes.

[0008] Preferably, a sealing baffle is hinged at the bottom of the guide plate, and the bottom of the sealing baffle rests on the isolation net to prevent the tail gas entering the tower body from flowing toward the upward material pipe.

[0009] Preferably, a crushing structure is provided at the bottom of the shell to crush the agglomerated activated carbon, the crushing structure comprising a connecting plate and a plurality of grid plates arranged in parallel, the connecting plate is fixed to the side wall of the shell, and a first groove and a second groove are provided on the connecting plate at intervals;

[0010] A first fixed shaft and a second fixed shaft are fixedly connected to the upper surface of the grid plate at intervals, the first fixed shaft is rotatably fitted in the first groove, and the second fixed shaft is rotatably fitted in the second groove;

[0011] An extrusion plate is fixedly connected to one side of the bottom surface of the grid plate, and a crushing tooth is fixedly connected to the other side of the bottom surface of the grid plate;

[0012] A tension spring is fixedly connected to the outer wall of the shell, and the bottom end of the tension spring is fixedly connected to the top of the grid plate to apply tension to the top of the grid plate; a connecting rope is fixedly connected to the bottom of the grid plate to apply tension to the bottom of the grid plate.

[0013] Preferably, a partition is horizontally fixed inside the shell, and the partition separates the shell into two parts, an upper part and an lower part. The water cooling chamber is above the partition, and the power chamber is below the partition.

[0014] Preferably, a lifting structure is provided in the power chamber to drive the connecting rope for lifting and lowering, and the lifting structure includes a vertically arranged long shaft, which is rotatably connected to the partition in the shell, and the top of the long shaft extends vertically upward and passes through the top of the tower body. A reciprocating screw is coaxially fixed to the bottom end of the long shaft, and a nut seat is threaded on the reciprocating screw, which is slidably matched with the power chamber, and the top of the connecting rope is fixed to the nut seat.

[0015] Preferably, a driving structure is provided at the top of the tower body for driving the long shaft and the feeding screw to rotate, and the driving structure includes a plurality of first synchronous pulleys and a plurality of second synchronous pulleys, the first synchronous pulleys are fixedly connected to the top of the long shaft, the second synchronous pulleys are fixedly connected to the top of the feeding screw, two adjacent first synchronous pulleys are driven by a belt, two adjacent second synchronous pulleys are driven by a belt, and the first synchronous pulley and the second synchronous pulley are driven by a belt;

[0016] A motor frame is fixedly connected to the top of the tower body, a motor is fixedly connected to the motor frame, and an output shaft of the motor is fixed on the first synchronous belt wheel to drive the first synchronous belt wheel to rotate.

[0017] Preferably, a wedge-shaped slide plate is fixedly connected to the feeding pipe and the top of the shell to transport the activated carbon between the two shells.

[0018] The activated carbon desulfurization and denitrification tower proposed in the present invention has the beneficial effect that: the activated carbon desulfurization and denitrification tower cooperates with the feeding screw and the feeding pipe to cyclically transfer the activated carbon particles located at the bottom of the carbon bed to the top of the carbon bed. When the cold water nozzle sprays cold water on the carbon bed from above to cool it down, the activated carbon particles moving from the bottom of the carbon bed to the top of the carbon bed can quickly dissipate heat to prevent the activated carbon particles located at the bottom of the carbon bed from spontaneous combustion or burns due to insufficient heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an activated carbon desulfurization and denitrification tower proposed by the present invention.

[0020] Figure 2 This is a schematic diagram of the structure inside the tower body of an activated carbon desulfurization and denitrification tower proposed by the present invention.

[0021] Figure 3 An activated carbon desulfurization and denitrification tower proposed by the present invention Figure 2 Enlarged view of point A in the middle.

[0022] Figure 4 An activated carbon desulfurization and denitrification tower proposed by the present invention Figure 2 Enlarged view of point B in the middle.

[0023] Figure 5 This is a schematic structural diagram of a grid plate of an activated carbon desulfurization and denitrification tower proposed by the present invention.

[0024] Figure 6 This is a schematic diagram of the right side structural view of an activated carbon desulfurization and denitrification tower proposed by the present invention.

[0025] Figure 7 An activated carbon desulfurization and denitrification tower proposed by the present invention Figure 6 Mid-CC section view.

[0026] Figure 8 An activated carbon desulfurization and denitrification tower proposed by the present invention Figure 7 Enlarged view of point D in the middle.

[0027] In the figure: 1. tower body; 2. isolation net; 3. shell; 301. water cooling chamber; 302. power chamber; 4. guide plate; 5. sealing baffle; 6. slide plate; 7. long axis; 8. feeding pipe; 9. feeding screw; 10. connecting plate; 101. first groove; 102. second groove; 11. first fixed axis; 12. second fixed axis; 13. grid plate; 14. extrusion plate; 15. crushing tooth; 16. connecting rope; 17. nut seat; 18. reciprocating screw; 19; 20. motor frame; 21. motor; 22. first synchronous pulley; 23. partition; 24. second synchronous pulley. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1 and Figure 2 An activated carbon desulfurization and denitrification tower comprises a tower body 1 with a thin-walled structure, an output port is arranged on the top of the tower body 1, an input port is arranged on the bottom of the tower body 1, the inside of the tower body 1 is used to hold activated carbon, an inverted V-shaped isolation net 2 is fixedly connected to the bottom side of the tower body 1, the isolation net 2 completely covers the output port, two thin-walled shells 3 are vertically fixedly connected inside the tower body 1, the two shells 3 are symmetrically distributed on both sides of the input port, and the shells 3 are located above the isolation net 2, and an inclined guide plate 4 is fixedly connected to the opposite side of the two shells 3.

[0030] Activated carbon particles are added into the tower from the input port at the top of the tower body 1 in advance. The activated carbon particles are gathered between the two shells 3 to form a carbon bed for purifying exhaust gas. The pore size of the isolation net 2 is smaller than the particle size of the activated carbon particles to prevent the activated carbon particles from being discharged from the input port at the bottom of the tower.

[0031] When the tail gas is purified, the tail gas enters the tower body from the input port at the bottom of the tower. The tail gas in the tower passes through the isolation net 2 from bottom to top and enters the carbon bed. After entering the carbon bed, the activated carbon particles purify the tail gas to achieve the purpose of desulfurization and denitrification. The purified tail gas is discharged from the output port at the top of the tower.

[0032] like Figure 2 , Figure 6 and Figure 7As shown, a feeding structure is provided between the outer wall of the shell 3 and the inner wall of the tower body 1, for transporting the activated carbon at the bottom of the tower body 1 upward, and the feeding structure includes a plurality of feeding pipes 8, and the feeding pipes 8 are vertically fixed between the outer wall of the shell 3 and the inner wall of the tower body 1, and a feeding screw 9 is rotatably installed in the feeding pipe 8, and a wedge-shaped slide plate 6 is fixed to the feeding pipe 8 and the top of the shell 3, for transporting the activated carbon between the two shells 3.

[0033] After the activated carbon particles enter between the two shells 3, they fall freely under the action of gravity, and fall on the inverted V-shaped isolation net 2 after being guided by the guide plate 4. The activated carbon particles at the bottom of the carbon bed will slide to both sides along the slope of the isolation net 2 under the action of the gravity of the carbon bed above and its own weight, and enter under the feeding pipe 8. At this time, the feeding screw 9 is driven to rotate. During the rotation of the feeding screw 9, the activated carbon particles at the bottom will be transported upward through the feeding pipe 8. After being discharged from the top of the feeding pipe 8, the activated carbon particles will fall back on the top of the carbon bed along the slope of the slide plate 6 under the action of gravity.

[0034] The activated carbon particles at the bottom of the carbon bed are transferred to the top of the carbon bed in a reciprocating manner through the cooperation of the feeding screw 9 and the feeding pipe 8. When the cold water nozzle sprays cold water on the carbon bed from above to cool it down, the activated carbon particles moving from the bottom of the carbon bed to the top of the carbon bed can quickly dissipate heat to prevent the activated carbon particles at the bottom of the carbon bed from spontaneous combustion or burns due to insufficient heat dissipation efficiency.

[0035] like Figure 7 and Figure 8 As shown, a sealing baffle 5 is hinged at the bottom of the guide plate 4 , and the bottom of the sealing baffle 5 abuts against the isolation net 2 to prevent the exhaust gas entering the tower body 1 from flowing toward the upward material pipe 8 .

[0036] When the tail gas enters the tower from the input port at the bottom of the tower, the sealing baffle 5 will guide the tail gas to a certain extent, thereby preventing a large amount of tail gas from escaping into the feeding pipe 8.

[0037] like Figure 4 and Figure 5As shown, a crushing structure is provided at the bottom of the shell 3 to crush the agglomerated activated carbon, and the crushing structure includes a connecting plate 10 and a plurality of parallel grid plates 13, the connecting plate 10 is fixedly connected to the side wall of the shell 3, and a first groove 101 and a second groove 102 are spaced apart on the connecting plate 10; a first fixed shaft 11 and a second fixed shaft 12 are spaced apart and fixedly connected to the upper surface of the grid plate 13, the first fixed shaft 11 can be rotatably fitted in the first groove 101, and the second fixed shaft 12 can be rotatably fitted in the second groove 102; an extrusion plate 14 is fixedly connected to one side of the bottom surface of the grid plate 13, and a crushing tooth 15 is fixedly connected to the other side of the bottom surface of the grid plate 13; a tension spring 19 is fixedly connected to the outer wall of the shell 3, and the bottom end of the tension spring 19 is fixedly connected to the top of the grid plate 13 to press the top of the grid plate 13. The bottom of the grid plate 16 is fixed with a connecting rope 16 to apply tension to the bottom of the grid plate 13. A partition 23 is fixed horizontally in the shell 3. The partition 23 divides the shell 3 into two parts, an upper and a lower part. The water-cooling chamber 301 is above the partition 23, and the power chamber 302 is below the partition 23. A lifting structure is provided in the power chamber to drive the connecting rope 16 to lift and lower. The lifting structure includes a vertically arranged long shaft 7, which is rotatably connected to the partition 23 in the shell 3. The top of the long shaft 7 extends vertically upward and passes through the top of the tower body 1. The bottom end of the long shaft 7 is coaxially fixed with a reciprocating screw 18. The reciprocating screw 18 is threadedly matched with a nut seat 17. The nut seat 17 is slidably matched with the power chamber 302, and the top of the connecting rope 16 is fixed to the nut seat 17.

[0038] Based on the above description, it is known that the activated carbon particles at the bottom of the carbon bed will slide down along the inclined surface of the inverted V-shaped isolation net 2 under the action of gravity, and the activated carbon particles at the bottom of the carbon bed are affected by the pressure from the top of the carbon bed, and some of the activated carbon particles will inevitably clump. The activated carbon particles inside the agglomerates are difficult to cool down. Therefore, in order to improve the heat dissipation efficiency, a water cooling chamber 301 is first set in the shell 3. After cold water is passed into the water cooling chamber 301, it can be ensured that the overall temperature in the tower will not be too high.

[0039] In addition, when the activated carbon particles at the bottom of the carbon bed slide down the inclined surface of the isolation net 2, the reciprocating screw 18 is driven to rotate. Since the nut seat 17 is limited in the housing 3 and cannot rotate, the reciprocating screw 18 drives the nut seat 17 to perform reciprocating linear motion in the vertical direction during the rotation process, so that the nut seat 17 continuously performs the lifting motion. For the lifting motion of the nut seat 17, Figure 8 As shown, where:

[0040] When the nut seat 17 rises, the nut seat 17 applies tension to the connecting rope 16 during the rising process. Under the action of the tension, the connecting rope 16 causes the crushing teeth 15 to rise. The rising crushing teeth 15 will apply force from one side of the grid plate 13. After the grid plate 13 is subjected to the force, it performs a lever movement with the second fixed axis 12 in the second groove 102 as a fulcrum, thereby causing the extrusion plate 14 to move downward. During the downward movement of the extrusion plate 14, the activated carbon particles sliding down the inclined surface of the isolation net 2 will be squeezed and crushed, so that the agglomerated activated carbon particles are dispersed.

[0041] When the nut seat 17 moves downward, the extrusion plate 14 moves upward due to the tension of the tension spring 19. At this time, the grid plate 13 will perform a lever movement with the first fixed axis 11 in the first groove 101 as a fulcrum, so that the crushing teeth 15 move downward, thereby further crushing the activated carbon particles sliding down the inclined surface of the isolation net 2.

[0042] like Figure 2 and Figure 3 As shown, a driving structure is provided at the top of the tower body 1 for driving the long shaft 7 and the feeding screw 9 to rotate, and the driving structure includes a plurality of first synchronous pulleys 22 and a plurality of second synchronous pulleys 24. The first synchronous pulley 2 is correspondingly fixedly connected to the top of the long shaft 7, and the second synchronous pulley 24 is correspondingly fixedly connected to the top of the feeding screw 9. The two adjacent first synchronous pulleys 22 are driven by a belt, the two adjacent second synchronous pulleys 24 are driven by a belt, and the first synchronous pulley 22 and the second synchronous pulley 24 are driven by a belt. A motor frame 20 is fixedly connected to the top of the tower body 1, and a motor 21 is fixedly connected to the motor frame 20. The output shaft of the motor 21 is fixedly connected to the first synchronous pulley 22 to drive the first synchronous pulley 22 to rotate.

[0043] When the motor 21 is powered on, it will drive the first synchronous pulley 22 to rotate. The rotation of the first synchronous pulley 22 will drive the remaining first synchronous pulleys 22 and the second synchronous pulley 24 to rotate through the belt, thereby driving the long shaft 7 and the feeding screw 9 to rotate.

[0044] Working principle and workflow:

[0045] Activated carbon particles are added into the tower from the input port at the top of the tower body 1 in advance. The activated carbon particles are gathered between the two shells 3 to form a carbon bed for purifying exhaust gas. The pore size of the isolation net 2 is smaller than the particle size of the activated carbon particles to prevent the activated carbon particles from being discharged from the input port at the bottom of the tower.

[0046] When the tail gas is purified, the tail gas enters the tower body from the input port at the bottom of the tower. The tail gas in the tower passes through the isolation net 2 from bottom to top and enters the carbon bed. After entering the carbon bed, the activated carbon particles purify the tail gas to achieve the purpose of desulfurization and denitrification. The purified tail gas is discharged from the output port at the top of the tower.

[0047] During the exhaust gas purification process, the motor 21 is energized, and the motor 21 drives the first synchronous pulley 22 to rotate. The rotation of the first synchronous pulley 22 drives the remaining first synchronous pulleys 22 and the second synchronous pulley 24 to rotate through the belt, thereby driving the long shaft 7 and the feeding screw 9 to rotate.

[0048] After the activated carbon particles enter between the two shells 3, they fall freely under the action of gravity, and fall on the inverted V-shaped isolation net 2 after being guided by the guide plate 4. The activated carbon particles at the bottom of the carbon bed will slide to both sides along the slope of the isolation net 2 under the action of the gravity of the carbon bed above and their own weight, and enter under the feeding pipe 8. At this time, the activated carbon particles at the bottom are transported upward through the feeding pipe 8 by the rotation of the feeding screw 9. After being discharged from the top of the feeding pipe 8, the activated carbon particles fall back on the top of the carbon bed along the slope of the slide plate 6 under the action of gravity.

[0049] The activated carbon particles at the bottom of the carbon bed are transferred to the top of the carbon bed in a reciprocating manner through the cooperation of the feeding screw 9 and the feeding pipe 8. When the cold water nozzle sprays cold water on the carbon bed from above to cool it down, the activated carbon particles moving from the bottom of the carbon bed to the top of the carbon bed can quickly dissipate heat to prevent the activated carbon particles at the bottom of the carbon bed from spontaneous combustion or burns due to insufficient heat dissipation efficiency.

[0050] When the activated carbon particles at the bottom of the carbon bed slide down the inclined surface of the isolation net 2, the long shaft 7 drives the reciprocating screw 18 to rotate. Since the nut seat 17 is limited in the shell 3 and cannot rotate, the reciprocating screw 18 drives the nut seat 17 to make reciprocating linear motion in the vertical direction during the rotation process, so that the nut seat 17 continuously performs the lifting motion. For the lifting motion of the nut seat 17, Figure 8 As shown, where:

[0051] When the nut seat 17 rises, the nut seat 17 applies tension to the connecting rope 16 during the rising process. Under the action of the tension, the connecting rope 16 causes the crushing teeth 15 to rise. The rising crushing teeth 15 will apply force from one side of the grid plate 13. After the grid plate 13 is subjected to the force, it performs a lever movement with the second fixed axis 12 in the second groove 102 as a fulcrum, thereby causing the extrusion plate 14 to move downward. During the downward movement of the extrusion plate 14, the activated carbon particles sliding down the inclined surface of the isolation net 2 will be squeezed and crushed, so that the agglomerated activated carbon particles are dispersed.

[0052] When the nut seat 17 moves downward, the extrusion plate 14 moves upward due to the tension of the tension spring 19. At this time, the grid plate 13 will perform a lever movement with the first fixed axis 11 in the first groove 101 as a fulcrum, so that the crushing teeth 15 move downward, thereby further crushing the activated carbon particles sliding down the inclined surface of the isolation net 2.

[0053] The activated carbon particles on the isolation net 2 are squeezed and crushed by the squeezing plate 14 and the crushing teeth 15, so as to ensure that the agglomerated activated carbon particles are dispersed to prevent the phenomenon that the activated carbon particles inside the agglomerates are difficult to dissipate heat.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An activated carbon desulfurization and denitrification tower, characterized in that: The invention comprises a tower body (1) of a thin-wall structure, wherein an output port is arranged at the top of the tower body (1), an input port is arranged at the bottom of the tower body (1), the interior of the tower body (1) is used to contain activated carbon, an inverted V-shaped isolation net (2) is fixedly connected to the bottom side of the interior of the tower body (1), and the isolation net (2) completely covers the output port, two shells (3) of a thin-wall structure are vertically fixedly connected inside the tower body (1), the two shells (3) are symmetrically distributed on both sides of the input port, and the shells (3) are located above the isolation net (2), guide plates (4) arranged obliquely are fixedly connected on opposite sides of the two shells (3), and a loading structure is arranged between the outer wall of the shell (3) and the inner wall of the tower body (1), so as to transport the activated carbon at the bottom of the tower body (1) upward.

2. The activated carbon desulfurization and denitrification tower according to claim 1, characterized in that: The feeding structure comprises a plurality of feeding pipes (8), the feeding pipes (8) being vertically fixed between the outer wall of the shell (3) and the inner wall of the tower body (1), and a feeding screw (9) being rotatably installed in the feeding pipes (8).

3. The activated carbon desulfurization and denitrification tower according to claim 2, characterized in that: A sealing baffle (5) is hingedly connected to the bottom of the guide plate (4), and the bottom of the sealing baffle (5) abuts against the isolation net (2) to prevent the tail gas entering the tower body (1) from flowing toward the upward material pipe (8).

4. The activated carbon desulfurization and denitrification tower according to claim 3, characterized in that: A crushing structure is provided at the bottom of the shell (3) to crush the agglomerated activated carbon, the crushing structure comprising a connecting plate (10) and a plurality of grid plates (13) arranged in parallel, the connecting plate (10) being fixedly connected to the side wall of the shell (3), and a first groove (101) and a second groove (102) being provided on the connecting plate (10) at intervals; A first fixed shaft (11) and a second fixed shaft (12) are fixedly connected to the upper surface of the grid plate (13) at intervals, the first fixed shaft (11) being rotatably fitted in the first groove (101), and the second fixed shaft (12) being rotatably fitted in the second groove (102); A squeezing plate (14) is fixedly connected to one side of the bottom surface of the grid plate (13), and a crushing tooth (15) is fixedly connected to the other side of the bottom surface of the grid plate (13); A tension spring (19) is fixedly connected to the outer wall of the shell (3), and the bottom end of the tension spring (19) is fixedly connected to the top of the grid plate (13) to apply tension to the top of the grid plate (13); a connecting rope (16) is fixedly connected to the bottom of the grid plate (16) to apply tension to the bottom of the grid plate (13).

5. The activated carbon desulfurization and denitrification tower according to claim 4, characterized in that: A partition (23) is fixedly connected horizontally in the shell (3), and the partition (23) divides the shell (3) into two parts, an upper part and an lower part. The upper part of the partition (23) is a water cooling chamber (301), and the lower part of the partition (23) is a power chamber (302).

6. The activated carbon desulfurization and denitrification tower according to claim 5, characterized in that: A lifting structure is provided in the power chamber to drive the connecting rope (16) to lift and lower. The lifting structure comprises a vertically arranged long shaft (7). The long shaft (7) is rotatably connected to a partition (23) in the shell (3). The top end of the long shaft (7) extends vertically upward and passes through the top of the tower body (1). A reciprocating screw (18) is coaxially fixedly connected to the bottom end of the long shaft (7). A nut seat (17) is threadedly matched on the reciprocating screw (18). The nut seat (17) is slidably matched with the power chamber (302). The top end of the connecting rope (16) is fixedly connected to the nut seat (17).

7. The activated carbon desulfurization and denitrification tower according to claim 6, characterized in that: A driving structure is provided at the top of the tower body (1) for driving the long shaft (7) and the feeding screw (9) to rotate, the driving structure comprising a plurality of first synchronous pulleys (22) and a plurality of second synchronous pulleys (24), the first synchronous pulleys (2) being fixedly connected to the top of the long shaft (7), the second synchronous pulleys (24) being fixedly connected to the top of the feeding screw (9), two adjacent first synchronous pulleys (22) being driven by a belt, two adjacent second synchronous pulleys (24) being driven by a belt, and the first synchronous pulley (22) and the second synchronous pulley (24) being driven by a belt; A motor frame (20) is fixedly connected to the top of the tower body (1), a motor (21) is fixedly connected to the motor frame (20), and an output shaft of the motor (21) is fixed to a first synchronous belt wheel (22) to drive the first synchronous belt wheel (22) to rotate.

8. The activated carbon desulfurization and denitrification tower according to any one of claims 1 to 7, characterized in that: A wedge-shaped slide plate (6) is fixedly connected to the top of the feeding pipe (8) and the shell (3) to transport the activated carbon between the two shells (3).

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