Automatic active carbon feeding device for waste incineration flue gas treatment

Abstract

The utility model relates to an automatic active carbon feeding device for garbage incineration flue gas treatment, including ash bin, storage bin and standby bin, the weighing sensor is installed in ash bin, the spiral conveyor that storage bin is equipped with is connected to in standby bin, the bottom of standby bin is equipped with hopper, the bottom of hopper is equipped with the feeding channel connected to ash bin, the top of standby bin is installed with drive motor, and the inner wall is connected with horizontal screen cloth, the screen cloth is equipped with support plate, a plurality of impact blocks are equipped on the support plate, the drive motor is connected with the rotating shaft of the center of the screen cloth, the side of rotating shaft is connected with push -back, and the push -back is equipped with the staggered slot corresponding with impact block, realize the setting standby bin between storage bin and ash bin, not directly with the active carbon that has the lump is sent into ash bin, but first carries out the stirring in the standby bin and scatters, and after sieving, the active carbon particles are sent into ash bin, guarantee that the contact area of active carbon is enough after being sprayed into flue gas pipeline with flue gas, and the waste of active carbon is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of activated carbon feeding devices, and in particular to an automatic activated carbon feeding device for treating flue gas from waste incineration. Background Technology

[0002] In the flue gas treatment system of waste-to-energy incineration plants, trace amounts of dioxins are present in the combustion flue gas. Even trace amounts of dioxins are highly carcinogenic to humans, thus requiring the use of activated carbon to adsorb and neutralize them. Current technology involves installing a carbon-injecting motor in the ash silo storing activated carbon, directly injecting the activated carbon into the flue gas duct for adsorption. A weighing sensor is installed in the ash silo to monitor the remaining activated carbon level. When the activated carbon is insufficient, a screw conveyor transports activated carbon from an external storage silo to replenish it. However, after long-term storage, the activated carbon in the storage silo easily absorbs moisture and clumps together. When these clumps are injected into the flue gas duct, the contact area with the flue gas is reduced, resulting in a weakened adsorption effect on harmful flue gas. This necessitates injecting more activated carbon to adsorb the flue gas, leading to waste. Therefore, designing an automatic activated carbon feeding device for waste incineration flue gas treatment that can dry the activated carbon and reduce activated carbon clumps has become an urgent technical problem to be solved. Summary of the Invention

[0003] To solve the above problems, this utility model provides an automatic activated carbon feeding device for treating flue gas from waste incineration.

[0004] The present invention provides an automatic activated carbon feeding device for treating flue gas from waste incineration, comprising an ash silo, a storage silo, and a preparation silo. A weighing sensor is installed in the ash silo. The storage silo is equipped with a screw conveyor connected to the preparation silo. A hopper is located at the bottom of the preparation silo, and a feeding channel is located at the bottom of the hopper. The bottom end of the feeding channel is connected to the ash silo and equipped with a solenoid valve. A drive motor is installed at the top of the preparation silo. A horizontal screen is connected to the inner wall of the preparation silo, and a support plate is provided on the screen. Multiple impact blocks are provided on the support plate. The drive motor is connected to a rotating shaft for linkage. The rotating shaft extends vertically downward into the preparation silo and is axially connected to the center of the screen. The impact blocks are arranged radially at intervals along the rotating shaft. A push plate is connected to the side of the rotating shaft, and the bottom of the push plate is aligned with the top surface of the screen and the support plate. The push plate has misalignment grooves corresponding to the impact blocks. The weighing sensor is electrically connected to the screw conveyor, the drive motor, and the solenoid valve.

[0005] With the above structure, a weighing sensor is electrically connected to the screw conveyor, drive motor, and solenoid valve. The weighing sensor is installed inside the ash silo to detect the weight of the remaining activated carbon. When the detected activated carbon weight is lower than a set threshold, the weighing sensor sends an electrical signal to activate the screw conveyor, drive motor, and solenoid valve. The screw conveyor transports the activated carbon from the storage silo into the preparation silo. After entering the preparation silo, the activated carbon falls onto the screen and support plate. The drive motor drives the rotating shaft to rotate, which in turn drives the push plate to move circumferentially. As the bottom of the push plate aligns with the top surfaces of the screen and support plate, the push plate pushes the activated carbon sequentially across the support plate and screen. When the activated carbon is pushed onto the support plate, the activated carbon clumps collide with the impact blocks, breaking up the clumps. Alternatively, as the push plate continues to move, the impact blocks pass through the misalignment grooves, shearing and crushing the clumps. The activated carbon clumps are broken up in two ways. When the activated carbon is pushed onto the screen, the broken activated carbon particles pass through the screen and fall into the hopper below. Unbroken activated carbon is pushed back onto the support plate by the push plate. The activated carbon particles falling into the hopper are concentrated and enter the bottom feeding channel. The solenoid valve opens, allowing the activated carbon particles to pass through the feeding channel into the ash hopper. The carbon injection motor then injects activated carbon from the ash hopper into the flue gas pipeline for adsorption treatment until the weighing sensor detects that the activated carbon weight is sufficient, at which point the screw conveyor, drive motor, and solenoid valve are shut off. This achieves the goal of setting up a preparation hopper between the storage hopper and the ash hopper. Instead of directly sending activated carbon with clumps into the ash hopper, the activated carbon is first stirred and broken up in the preparation hopper, and then screened before being sent into the ash hopper. This ensures that the activated carbon has sufficient contact area with the flue gas after being injected into the flue gas pipeline, reducing the waste of activated carbon.

[0006] As a further improvement of this utility model, the bottom surface of the support plate is provided with a receiving cavity, and an electric heating tube is fixed inside the receiving cavity. The electric heating tube is electrically connected to an independent power supply, and the switch of the independent power supply is electrically connected to the weighing sensor.

[0007] With the above structure, the drive motor and independent power supply are started synchronously by the weighing sensor. The independent power supply heats the electric heating tube. The heat from the electric heating tube is transferred through the inner wall of the cavity, which heats the support plate and the impact block. This heats the activated carbon that is pushed onto the support plate and contacts the impact block, causing the activated carbon clumps to dry and making it easier for the clumps to return to a loose granular structure.

[0008] As a further improvement of this utility model, the impact block is a hemispherical protrusion with the arc surface facing upward, and the inner wall of the misalignment groove is provided with an arc surface that matches the shape of the impact block.

[0009] With the above structure, the impact block is a hemispherical protrusion with an upward arc surface, and the inner wall of the misalignment groove is provided with a corresponding arc surface. While ensuring the shearing function of the activated carbon protrusion, the contact area between the impact block and the inner wall of the misalignment groove is reduced, which reduces the risk of activated carbon getting stuck between the impact block and the inner wall of the misalignment groove, causing the push plate to jam.

[0010] As a further improvement of this utility model, a wear-resistant metal layer is fixed on the surface of the impact block.

[0011] With the above structure, the impact block has a metal wear-resistant layer fixed on its surface, which improves the structural strength of the impact block. The metal wear-resistant layer is not easily worn by impact, compression and shearing of activated carbon agglomerates, thus extending the service life of the impact block.

[0012] As a further improvement of this utility model, a reinforcing rib is fixed on the push plate, and the reinforcing rib is vertically connected to the upper and lower edges of the push plate.

[0013] With the above structure, reinforcing ribs are fixed on the push plate, and the reinforcing ribs are vertically connected to the upper and lower edges of the push plate, which improves the overall structural strength of the push plate and prevents the bottom of the push plate from breaking due to the large resistance of activated carbon. Attached Figure Description

[0014] Figure 1 The diagram shown is a schematic diagram of the structure of this utility model.

[0015] Figure 2 The figure shown is a cross-sectional structural diagram of this utility model.

[0016] Figure 3 The diagram shows the structure of the screen and pusher plate.

[0017] Figure 4 The diagram shown is a schematic of the cavity structure.

[0018] 1-Ash silo, 2-Storage silo, 3-Preparation silo, 4-Screw conveyor, 5-Hopper, 6-Feeding channel, 7-Solenoid valve, 8-Drive motor, 9-Screw, 10-Support plate, 11-Impact block, 12-Rotating shaft, 13-Push plate, 14-Misalignment groove, 15-Receiving cavity, 16-Electric heating tube, 17-Independent power supply, 18-Reinforcing rib. Detailed Implementation

[0019] like Figures 1-4The diagram shows an automatic activated carbon feeding device for treating flue gas from waste incineration, comprising an ash silo 1, a storage silo 2, and a preparation silo 3. A weighing sensor is installed inside the ash silo 1. The storage silo 2 is equipped with a screw conveyor 4 connected to the preparation silo 3. A hopper 5 is located at the bottom of the preparation silo 3, and a feeding channel 6 is located at the bottom of the hopper 5. The bottom end of the feeding channel 6 is connected to the ash silo 1 and equipped with a solenoid valve 7. A drive motor 8 is installed at the top of the preparation silo 3, and a horizontal screen 9 is connected to the inner wall. A support plate 10 is mounted on the screen 9. The support plate 10 is provided with multiple impact blocks 11. The drive motor 8 is connected to the rotating shaft 12 for linkage. The rotating shaft 12 extends vertically downward into the material preparation bin 3 and is axially connected to the center of the screen 9. The impact blocks 11 are arranged at intervals along the radial direction of the rotating shaft 12. The side of the rotating shaft 12 is connected to the push plate 13. The bottom of the push plate 13 is aligned with the top surface of the screen 9 and the support plate 10. The push plate 13 is provided with a misalignment groove 14 corresponding to the impact blocks 11. The weighing sensor is electrically connected to the screw conveyor 4, the drive motor 8 and the solenoid valve 7.

[0020] The weighing sensor is electrically connected to the screw conveyor 4, drive motor 8, and solenoid valve 7. Installed inside the ash silo 1, the weighing sensor detects the weight of the remaining activated carbon in the ash silo 1. When the detected activated carbon weight is below a set threshold, the weighing sensor sends an electrical signal to activate the screw conveyor 4, drive motor 8, and solenoid valve 7. The screw conveyor 4 transports the activated carbon from the storage silo 2 into the preparation silo 3. After entering the preparation silo 3, the activated carbon falls onto the screen 9 and support plate 10. The drive motor 8 drives the rotating shaft 12 to rotate, which in turn drives the push plate 13 to move circumferentially. The bottom of the push plate 13 aligns with the top surfaces of the screen 9 and support plate 10, allowing the push plate 13 to push the activated carbon sequentially across the support plate 10 and screen 9. When the activated carbon is pushed onto the support plate 10, any clumps of activated carbon collide with the impact block 11, breaking up the clumps. Alternatively, as the push plate 13 continues to move, the impact block 11 passes through the misalignment groove 14, further dispersing the clumps. The activated carbon clumps are broken up by shearing and compression. When the activated carbon is pushed onto the screen 9, the broken activated carbon particles pass through the screen 9 and fall into the hopper 5 below. The unbroken activated carbon is pushed again onto the support plate 10 by the push plate 13. The activated carbon particles falling into the hopper 5 are concentrated into the bottom feeding channel 6. The solenoid valve 7 is opened so that the activated carbon particles can pass through the feeding channel 6 into the ash hopper 1. The carbon injection motor sprays the activated carbon from the ash hopper 1 into the flue gas pipeline for adsorption treatment until the weighing sensor detects that the weight of the activated carbon is sufficient, and then the screw conveyor 4, drive motor 8 and solenoid valve 7 are shut off. This realizes the setting of a preparation hopper 3 between the storage hopper 2 and the ash hopper 1. Instead of directly sending the activated carbon with clumps into the ash hopper 1, it is first stirred and broken up in the preparation hopper 3, and then sent into the ash hopper 1 after sieving. This ensures that the activated carbon has sufficient contact area with the flue gas after being sprayed into the flue gas pipeline, reducing the waste of activated carbon.

[0021] The bottom surface of the support plate 10 is provided with a receiving cavity 15, and an electric heating tube 16 is fixed inside the receiving cavity 15. The electric heating tube 16 is electrically connected to an independent power supply 17, and the switch of the independent power supply 17 is electrically connected to the weighing sensor.

[0022] The drive motor 8 and the independent power supply 17 are started synchronously by the weighing sensor. The independent power supply 17 heats up the electric heating tube 16. The heat from the electric heating tube 16 is transferred through the inner wall of the receiving cavity 15, which heats up the support plate 10 and the impact block 11. This heats up the activated carbon that is pushed onto the support plate 10 and comes into contact with the impact block 11, causing the activated carbon clumps to dry and making it easier for the clumps to return to a loose granular structure.

[0023] The impact block 11 is a hemispherical protrusion with the arc surface facing upward, and the inner wall of the misalignment groove 14 is provided with an arc surface that matches the shape of the impact block 11.

[0024] By using the impact block 11 as a hemispherical protrusion with the arc surface facing upwards, and the inner wall of the misalignment groove 14 having a corresponding arc surface, the contact area between the impact block 11 and the inner wall of the misalignment groove 14 is reduced while ensuring the shearing function of the activated carbon protrusion. This reduces the risk of activated carbon getting stuck between the impact block 11 and the inner wall of the misalignment groove 14, causing the push plate 13 to jam.

[0025] The surface of the impact block 11 is fixed with a metal wear-resistant layer.

[0026] The impact block 11 has a metal wear-resistant layer fixed on its surface, which improves the structural strength of the impact block 11. The metal wear-resistant layer is not easily worn by impact, compression and shearing of activated carbon agglomerates, thus extending the service life of the impact block 11.

[0027] A reinforcing rib 18 is fixed on the push plate 13, and the reinforcing rib 18 is vertically connected to the upper and lower edges of the push plate 13.

[0028] The push plate 13 is fixed with reinforcing ribs 18, which are vertically connected to the upper and lower edges of the push plate 13. This improves the overall structural strength of the push plate 13 and prevents the bottom of the push plate 13 from breaking due to the large resistance of the activated carbon.

Claims

1. An automatic activated carbon feeding device for treating flue gas from waste incineration, characterized in that: The silo includes an ash silo (1), a storage silo (2), and a preparation silo (3). The ash silo (1) is equipped with a weighing sensor. The storage silo (2) is equipped with a screw conveyor (4) connected to the preparation silo (3). The bottom of the preparation silo (3) is equipped with a hopper (5). The bottom of the hopper (5) is equipped with a feeding channel (6). The bottom end of the feeding channel (6) is connected to the ash silo (1) and equipped with a solenoid valve (7). The top of the preparation silo (3) is equipped with a drive motor (8). The inner wall is connected with a horizontal screen (9). The screen (9) is equipped with a support plate (10). The support plate (10) is equipped with multiple impactors. Block (11), drive motor (8) is connected to rotating shaft (12) for linkage. Rotating shaft (12) extends vertically downward into the material preparation bin (3) and is axially connected to the center of screen (9). Impact blocks (11) are arranged radially at intervals along rotating shaft (12). Push plate (13) is connected to the side of rotating shaft (12). The bottom of push plate (13) is aligned with the top surface of screen (9) and support plate (10). Push plate (13) is provided with misaligned groove (14) corresponding to impact block (11). Weighing sensor is electrically connected to screw conveyor (4), drive motor (8) and solenoid valve (7).

2. The automatic activated carbon feeding device for treating flue gas from waste incineration according to claim 1, characterized in that: The bottom surface of the support plate (10) is provided with a receiving cavity (15), and an electric heating tube (16) is fixed inside the receiving cavity (15). The electric heating tube (16) is electrically connected to an independent power supply (17), and the switch of the independent power supply (17) is electrically connected to the weighing sensor.

3. The automatic activated carbon feeding device for treating flue gas from waste incineration according to claim 1, characterized in that: The impact block (11) is a hemispherical protrusion with the arc surface facing upward, and the inner wall of the misalignment groove (14) is provided with an arc surface that matches the shape of the impact block (11).

4. The automatic activated carbon feeding device for treating flue gas from waste incineration according to claim 1, characterized in that: The surface of the impact block (11) is fixed with a metal wear-resistant layer.

5. The automatic activated carbon feeding device for treating flue gas from waste incineration according to claim 1, characterized in that: A reinforcing rib (18) is fixed on the push plate (13), and the reinforcing rib (18) is vertically connected to the upper and lower edges of the push plate (13).

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