A weighing and metering device for activated carbon of an environmental protection system and a control method thereof

Abstract

The application discloses an active carbon weighing metering device of an environmental protection system and a control method thereof, and particularly designs an active carbon weighing metering device of an environmental protection system.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection systems for waste incineration flue gas, and particularly to an activated carbon weighing and metering feeding device for an environmental protection system and its control method. Background Art

[0002] Since dioxins are generated and emitted during waste incineration, in order to better remove heavy metals and dioxins, activated carbon is sprayed into the flue gas pipeline between the inlet of the reaction tower and the dust collector. The activated carbon adsorbs heavy metals and dioxins to ensure that the emission concentration of heavy metals and dioxins meets the national emission standards (i.e., less than 0.1 TEQ ng / m³). For the convenience of commissioning and adjustment and optimization during operation, an injection port for activated carbon is reserved on the inlet flue of the spray reaction tower. The activated carbon is stored in an activated carbon bin and is transported to the flue through a rotary lobe blower by an activated carbon feeder to remove dioxins and heavy metals in the waste incineration flue gas.

[0003] The activated carbon loss-in-weight scale is mainly used for weighing and metering the conveying amount of activated carbon. The activated carbon injection device is used for the conveying of activated carbon in the activated carbon loss-in-weight scale system. The conveying amount of activated carbon is mainly calculated by referring to parameters such as flue gas volume and flue gas components of CEMS, and then the required conveying weight of activated carbon is calculated through the control logic of DCS. The weight signal is fed back to the activated carbon weighing and metering feeding system. The activated carbon weighing and metering feeding system then outputs the activated carbon of the required weight according to the signal through the PLC supporting the invention device. The PLC supporting the invention device is like the "brain" of the activated carbon weighing and metering feeding system to control the operation of this set of equipment. If the weighing of the activated carbon is inaccurate, it will cause the actual conveyed amount of activated carbon to not match the calculated value of DCS control, thus affecting whether the heavy metals can meet the emission standards and the cost budget of the waste incineration power plant operation.

[0004] In order to solve the above problems, the present invention proposes an activated carbon weighing and metering feeding device for an environmental protection system and its control method. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: an activated carbon weighing and metering feeding device for an environmental protection system, comprising an integral support frame, an activated carbon quantitative rotary feeder mounted on top of the integral support frame, a conveying hopper fixedly mounted at the top of the integral support frame, the upper end of the conveying hopper being fixedly connected to the lower end of the activated carbon quantitative rotary feeder via a flexible connection, a storage container mounted at the lower end of the conveying hopper, the storage container being fixedly mounted inside the integral support frame, a gear protective cover fixedly mounted on the lower half of the side wall of the storage container, a first stirring shaft positioned in the middle of the storage container, one end of the first stirring shaft extending into the storage container and fixedly mounted with a first stirring blade, the other end of the first stirring shaft extending to... A first pulley is installed inside the gear protective cover. A fourth flat key is embedded in the center of the first pulley. The left end of the first stirring shaft rests against the fourth flat key. A fastening bolt is installed at the center of the left end face of the first pulley. One end of the fastening bolt passes through the first pulley and the fourth flat key and is threaded into the left end face of the first stirring shaft. A pressure cap is fitted onto the fastening bolt, and the pressure cap rests against the side wall of the first pulley. A third deep groove bearing and a fourth deep groove bearing are respectively fitted on the left end of the first stirring shaft. An installation cylinder is fixedly installed on the outer ring side wall of the third and fourth deep groove bearings. The right end of the installation cylinder is fixedly installed on the side wall of the storage container. A perforated elastic retaining ring is provided between the third deep groove bearing and the first pulley. An elastic retaining ring is fitted onto the No. 1 stirring shaft. A No. 3 oil seal is installed between the No. 4 deep groove bearing and the side wall of the storage container. The No. 3 oil seal is fitted at the connection between the No. 1 stirring shaft and the side wall of the storage container. A No. 1 stirring gear is fitted onto the No. 1 stirring shaft, and a No. 2 stirring gear is meshed with the No. 1 stirring gear. A No. 2 stirring shaft is fixedly inserted at the center of the No. 2 stirring gear. One end of the No. 2 stirring shaft penetrates the side wall of the storage container and extends into the storage container. A No. 2 stirring blade is fixedly installed on the No. 2 stirring shaft. A No. 2 pulley is installed in the lower half of the gear protective cover. The No. 2 pulley is connected to the No. 1 pulley by a transmission belt. A drive shaft is fixedly installed at the center of the No. 2 pulley, and the other end of the drive shaft passes through… A main screw shaft is fixedly installed through the side wall of the storage container. The other end of the main screw shaft passes through the other side of the storage container and is equipped with an explosion-proof motor. A baffle cylinder is installed on the right end of the main screw shaft extending out of the storage container. The baffle cylinder is fixedly installed on the side wall of the overall support frame. A discharge cylinder is located at the lower end of the baffle cylinder. Gear No. 2 is fixedly installed on the drive shaft. Gear No. 2 meshes with Gear No. 1. A driven shaft is fixedly installed at the center of Gear No. 1. The other end of the driven shaft passes through the side wall of the storage container and is fixedly installed with an auxiliary screw shaft. The other end of the auxiliary screw shaft is rotatably connected to the inner wall of the baffle cylinder. An activated carbon weighing device is installed on the lower end face of the storage container. A second flat key is installed between Gear No. 1 and the driven shaft.The second flat key is fixedly connected to the first gear and the driven shaft, and a second oil seal is installed between the driven shaft and the storage container.

[0006] As a preferred embodiment of the present invention, the auxiliary spiral shaft is rotatably connected to a first bushing at one end away from the driven shaft, and the first bushing is fixedly installed on the inner wall of the shielding cylinder.

[0007] As a preferred embodiment of the present invention, a flange is provided at the right end of the shielding cylinder, and an explosion-proof motor is provided at the right end of the main spiral shaft through the right side of the flange. The explosion-proof motor is fixedly installed on the side wall of the first bushing.

[0008] As a preferred embodiment of the present invention, a vertical cylinder is provided on the lower side wall of the right end of the shielding cylinder, and a ash conveying pipe is provided at the lower end of the vertical cylinder, with a sealing cap provided on the side wall of the ash conveying pipe.

[0009] As a preferred embodiment of the present invention, a second bushing is rotatably connected to one end of the drive shaft located inside the gear protective cover. The second bushing is fixedly installed in the inner wall of the gear protective cover. A third bushing is also rotatably connected to one end of the drive shaft located inside the gear protective cover. A second flange is fixedly installed on the third bushing. The second flange is fixedly installed on the side wall of the storage device.

[0010] As a preferred technical solution of the present invention, a first flat key is provided at the end of the first stirring shaft opposite to the fastening bolt, and the fastening bolt is threadedly connected to the first flat key.

[0011] As a preferred embodiment of the present invention, a fourth bushing is rotatably connected to the first stirring shaft, a connecting plate is fixedly installed on the fourth bushing, and the connecting plate is fixedly installed on the inner wall of the gear protective cover.

[0012] As a preferred embodiment of the present invention, a No. 3 flat key is fixedly installed at the right end of the main spiral shaft, and the other end of the No. 3 flat key is fixedly installed at the output end of the explosion-proof motor.

[0013] This invention also discloses a control method for an activated carbon weighing and metering feeding device in an environmental protection system, comprising the following steps:

[0014] A. When the flue gas flow rate exceeds the minimum start-up flow rate, such as: X Nm 3 / h, then the activated carbon conveying air fan is turned on so that the activated carbon can be conveyed out through the activated carbon conveying air fan. This is the power source for the activated carbon conveying.

[0015] B. When the pipeline conveying pressure enters the normal range, start the activated carbon quantitative rotary feeder. The flow rate is fed back by the activated carbon weighing device, and the feed amount is controlled by the frequency converter of the screw conveyor, which is incorporated into the automatic control of the loop.

[0016] C. Activate "Lost Weight Calculation"

[0017] C1. Once the metering tank has finished feeding (reaching 80%), the "Lost Weight Calculation" is activated, the system begins to set this weight as a variable called "Final Weight", and the timer is reset to zero.

[0018] C2. When the timer starts from zero and the timing cycle is completed, the weight of the quantitative supply tank at this time is stored as a variable and called "current weight". The timer is programmable and the timing cycle is 2 minutes (initial setting).

[0019] C3. The flow rate ratio is calculated as follows: (final weight - current weight) / (time of timing cycle).

[0020] C4. The flow ratio value is stored in the storage stack, and the original flow ratio is also deleted from the stack, representing a new average flow ratio.

[0021] C5. Reset the timer to zero.

[0022] C6. When the timer expires, the value of "current weight" is transferred to "last weight", and this weight value is stored as "current weight".

[0023] C7. Return to step 1.

[0024] D. When the metering tank reaches a low weight, such as 20% of the total volume of the metering tank.

[0025] E. Terminate "Loss Weight Calculation", display the last calculated weight, and run the activated carbon quantitative rotary feeder at a constant speed during feeding.

[0026] F. Operate the activated carbon quantitative rotary feeder.

[0027] G. When the weight of the quantitative feeding tank reaches the high level, such as 80%, stop the vibrator of the activated carbon storage silo wall, close the gate valve of the pipeline after the activated carbon silo, delay for 3 seconds (preliminary setting value, based on the emptying time), and stop the activated carbon quantitative rotary feeder.

[0028] H. Reactivate "Lost Weight Calculation".

[0029] I. Proceed to step 1.

[0030] This invention provides an activated carbon weighing and metering feeding device and its control method for an environmental protection system, which has the following beneficial effects:

[0031] 1. The activated carbon weighing and metering feeding device of the present invention provides favorable equipment support for the accurate metering required for activated carbon conveying. The activated carbon weighing and metering feeding device of the present invention is different from ordinary metering and feeding devices. The device of the present invention adopts a dual-shaft screw conveyor, which effectively locks the air in the activated carbon output pipe to prevent the negative pressure of the ejector from affecting the output material and affecting the accuracy of weighing and conveying.

[0032] 2. This equipment has a built-in activated carbon weighing device, which is different from conventional external weighing scales. External weighing scales are affected by factors such as other equipment on site, site vibration, and electrical signal interference. The built-in activated carbon weighing device in this invention greatly reduces this impact and improves the operating accuracy of the equipment. Attached Figure Description

[0033] Figure 1 This is a front structural diagram of an activated carbon weighing and metering feeding device for an environmental protection system proposed in this invention.

[0034] Figure 2 This is a top cross-sectional view of point AA in the activated carbon weighing and metering feeding device of an environmental protection system proposed in this invention;

[0035] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0036] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0037] Figure 5 This is a side view of the activated carbon weighing and metering feeding device for an environmental protection system proposed in this invention.

[0038] Figure 6 This is a side sectional view of an activated carbon weighing and metering feeding device for an environmental protection system proposed in this invention.

[0039] Figure 7 for Figure 6 A magnified structural diagram at point C.

[0040] In the diagram: 1. Overall support frame; 2. Conveying hopper; 3. Storage container; 4. Ash conveying pipe; 5. Gear protective cover; 6. Flange; 7. No. 1 bushing; 8. Driven shaft; 9. Drive shaft; 10. No. 2 bushing; 11. Flange; 12. No. 3 bushing; 13. Gear No. 1; 14. Gear No. 2; 15. No. 1 stirring shaft; 16. No. 4 bushing; 17. Connecting plate; 18. No. 1 stirring gear; 19. No. 2 stirring gear; 20. No. 1 stirring blade; 21. No. 2 stirring blade; 22. Seal. 23. Cover, 24. Fastening bolt, 25. Pressure cap, 26. No. 1 flat key, 27. No. 1 oil seal, 28. No. 2 flat key, 29. No. 2 oil seal, 30. No. 2 deep groove bearing, 31. No. 3 flat key, 32. No. 4 flat key, 33. Hole elastic retaining ring, 34. No. 3 deep groove bearing, 35. No. 4 deep groove bearing, 36. No. 3 oil seal, 37. No. 1 pulley, 38. Activated carbon weighing device, 39. Activated carbon quantitative rotary feeder, 40. Flexible connection. Detailed Implementation

[0041] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Example

[0044] refer to Figures 1-7This invention provides a technical solution: an activated carbon weighing and metering feeding device for an environmental protection system, comprising an overall support 1, an activated carbon quantitative rotary feeder 39 disposed above the overall support 1, a conveying hopper 2 fixedly installed at the top of the overall support 1, the upper end of the conveying hopper 2 being fixedly connected to the lower end of the activated carbon quantitative rotary feeder 39 via a flexible connection 40, a storage container 3 disposed at the lower end of the conveying hopper 2, the storage container 3 being fixedly installed inside the overall support 1, a gear guard 5 fixedly installed on the lower half of the side wall of the storage container 3, a first stirring shaft 15 disposed in the middle of the storage container 3, one end of the first stirring shaft 15 extending into the storage container 3 and respectively fixedly installed with a first stirring blade 20, the other end of the first stirring shaft 15 extending into the gear guard 5. Inside the protective cover 5, a first pulley 37 is installed. A fourth flat key 32 is embedded in the center of the first pulley 37. The left end of the first stirring shaft 15 rests on the fourth flat key 32. A fastening bolt 23 is installed at the center of the left end face of the first pulley 37. One end of the fastening bolt 23 passes through the first pulley 37 and the fourth flat key 32 and is threaded into the left end face of the first stirring shaft 15. A pressure cap 24 is fitted onto the fastening bolt 23, and the pressure cap 24 rests against the side wall of the first pulley 37. A third deep groove bearing 34 and a fourth deep groove bearing 35 are respectively fitted on the left end of the first stirring shaft 15. An installation cylinder is fixedly installed on the outer ring side wall of the third deep groove bearing 34 and the fourth deep groove bearing 35. The right end of the installation cylinder is fixedly installed on the side wall of the storage container 3. A perforated elastic retaining ring 33 is provided between pulley 4 and pulley 37. The perforated elastic retaining ring 33 is fitted onto the first stirring shaft 15. A third oil seal 36 is provided between the fourth deep groove bearing 35 and the side wall of the storage container 3. The third oil seal 36 is fitted onto the connection between the first stirring shaft 15 and the side wall of the storage container 3. A first stirring gear 18 is fitted onto the first stirring shaft 15. A second stirring gear 19 is meshed on the first stirring gear 18. A second stirring shaft is fixedly inserted at the center of the second stirring gear 19. A first deep groove ball bearing 27 and a second deep groove bearing 30 are respectively fitted onto the left end of the second stirring shaft. The outer rings of the first deep groove ball bearing 27 and the second deep groove bearing 30 are fixedly installed on the inner wall of the gear protective cover 5. The second stirring shaft and the storage container 3... A first oil seal 26 is installed at the connection between the side walls. One end of the second stirring shaft passes through the side wall of the storage container 3 and extends into the storage container 3. A second stirring blade 21 is fixedly installed on the second stirring shaft. A second pulley is installed on the lower half of the gear protective cover 5. The second pulley is connected to the first pulley 37 by a transmission belt. A drive shaft 9 is fixedly installed at the center of the second pulley. The other end of the drive shaft 9 passes through the side wall of the storage container 3 and a main spiral shaft is fixedly installed. The other end of the main spiral shaft passes through the other side of the storage container 3 and is equipped with an explosion-proof motor. A baffle cylinder is installed on the right end of the main spiral shaft that extends out of the storage container 3. The baffle cylinder is fixedly installed on the side wall of the overall support 1. A discharge cylinder is installed at the lower end of the baffle cylinder. A second gear 14 is fixedly installed on the drive shaft 9.Gear 14 meshes with gear 13. A driven shaft 8 is fixedly installed at the center of gear 13. The other end of the driven shaft 8 passes through the side wall of the storage container 3 and is fixedly installed with an auxiliary screw shaft. The other end of the auxiliary screw shaft is rotatably connected to the inner wall of the baffle cylinder. An activated carbon weighing device 38 is installed on the lower end face of the storage container 3. A second flat key 28 is installed between gear 13 and driven shaft 8, and the second flat key 28 is fixedly connected to gear 13 and driven shaft 8. A second oil seal 29 is installed between driven shaft 8 and the storage container 3.

[0045] Furthermore, a first bushing 7 is rotatably connected to one end of the auxiliary spiral shaft away from the driven shaft 8, and the first bushing 7 is fixedly installed on the inner wall of the shielding cylinder.

[0046] Furthermore, a flange 6 is provided at the right end of the shielding cylinder, and an explosion-proof motor is provided at the right end of the main spiral shaft through the right side of the flange 6. The explosion-proof motor is fixedly installed on the side wall of the first bushing 7.

[0047] Furthermore, a vertical cylinder is provided on the lower side wall of the right end of the shielding cylinder, and a conveying pipe 4 is provided at the lower end of the vertical cylinder. A sealing cover 22 is provided on the side wall of the conveying pipe 4, and a sprayer is provided at one end of the pipe 4.

[0048] Furthermore, a second bushing 10 is rotatably connected to one end of the drive shaft located inside the gear protective cover 5, and the second bushing 10 is fixedly installed in the inner wall of the gear protective cover 5.

[0049] Furthermore, a flat key 25 is provided at one end of the first stirring shaft 15 opposite to the fastening bolt 23, and the fastening bolt 23 is threaded into the flat key 25;

[0050] Furthermore, a fourth shaft sleeve 16 is rotatably connected to the first stirring shaft 15, and a connecting plate 17 is fixedly installed on the fourth shaft sleeve 16. The connecting plate 17 is fixedly installed on the inner wall of the gear protective cover 5.

[0051] Furthermore, a No. 3 flat key 31 is fixedly installed on the right end of the main screw shaft, and the other end of the No. 3 flat key 31 is fixedly installed on the output end of the explosion-proof motor.

[0052] This invention also discloses a control method for an activated carbon weighing and metering feeding device in an environmental protection system, comprising the following steps:

[0053] First, based on the value fed back by the flue gas flow meter, and according to the ratio of K1 = 125 mg / Nm3, the activated carbon quantitative rotary feeder 39 is adjusted to quantitatively inject it into the flue system. The activated carbon dosage is calculated according to the formula Faft bag (Nm3 / h wet) x 125 (mg / Nm3 wet) and then implemented by the activated carbon quantitative rotary feeder 39. The activated carbon quantitative rotary feeder 39 must be calibrated after hot commissioning.

[0054] Startup command,

[0055] A. When the flue gas flow rate exceeds the minimum start-up flow rate, such as: X Nm 3 / h, then the activated carbon conveying air fan is turned on so that the activated carbon can be conveyed out through the activated carbon conveying air fan. This is the power source for the activated carbon conveying.

[0056] B. When the pipeline conveying pressure enters the normal range, start the activated carbon quantitative rotary feeder 39. The flow rate is fed back by the activated carbon weighing device 38, and the feed amount is controlled by the frequency converter of the screw conveyor and incorporated into the automatic control loop.

[0057] C. Activate "Lost Weight Calculation"

[0058] C1. Once the metering tank has finished feeding (reaching 80%), the "Lost Weight Calculation" is activated, the system begins to set this weight as a variable called "Final Weight", and the timer is reset to zero.

[0059] C2. When the timer starts from zero and the timing cycle is completed, the weight of the quantitative supply tank at this time is stored as a variable and called "current weight". The timer is programmable and the timing cycle is 2 minutes (initial setting).

[0060] C3. The flow rate ratio is calculated as follows: (final weight - current weight) / (time of timing cycle).

[0061] C4. The flow ratio value is stored in the storage stack, and the original flow ratio is also deleted from the stack, representing a new average flow ratio.

[0062] C5. Reset the timer to zero.

[0063] C6. When the timer expires, the value of "current weight" is transferred to "last weight", and this weight value is stored as "current weight".

[0064] C7. Return to step 1.

[0065] Note: When the metering tank is refilled, the "Loss Weight Calculation" is reactivated, and the instructions will start again from step 1. However, the values ​​in the storage stack do not return to zero (except when closed). When the "Loss Weight Calculation" is terminated to add material to the metering hopper, the last valid calculation will be displayed. The flow rate will only return to zero when the activated carbon metering rotary feeder 39 stops.

[0066] D. When the metering tank reaches a low weight, such as 20% of the total volume of the metering tank.

[0067] E. Terminate “Loss Weight Calculation”, display the last calculated weight, and run the activated carbon quantitative rotary feeder 39 at a constant speed during feeding.

[0068] F. Operate the activated carbon quantitative rotary feeder 39.

[0069] G. When the weight of the quantitative feed tank reaches the high level, such as 80%, the activated carbon storage silo wall vibrator is stopped, the plate valve of the activated carbon silo pipeline is closed, and after a delay of 3 seconds (preliminary setting value, based on the emptying time), the activated carbon quantitative rotary feeder 39 is stopped.

[0070] H. Reactivate "Lost Weight Calculation".

[0071] I. Proceed to step 1.

[0072] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of the equivalent elements 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.

Claims

1. An activated carbon weighing and metering feeding device for an environmental protection system, comprising an integral support frame (1), characterized in that, An activated carbon quantitative rotary feeder (39) is installed above the overall support (1). A conveying hopper (2) is fixedly installed at the top of the overall support (1). The upper end of the conveying hopper (2) is fixedly connected to the lower end of the activated carbon quantitative rotary feeder (39) via a flexible connection (40). A storage container (3) is installed at the lower end of the conveying hopper (2). The storage container (3) is fixedly installed inside the overall support (1). A gear guard (5) is fixedly installed on the lower half of the side wall of the storage container (3). A first stirring shaft (15) is installed in the middle of the storage container (3). One end of the first stirring shaft (15) extends into the storage container (3) and a first stirring plate (20) is fixedly installed thereon. The other end of the stirring shaft (15) extends into the gear guard (5) and is provided with a pulley (37). A key (32) is embedded in the center of the pulley (37). The left end of the stirring shaft (15) rests on the key (32). A fastening bolt (23) is provided at the center of the left end face of the pulley (37). One end of the fastening bolt (23) passes through the pulley (37) and the key (32) and is threaded into the left end face of the stirring shaft (15). A pressure cap (24) is fitted on the fastening bolt (23). The pressure cap (24) rests on the side wall of the pulley (37). A deep groove bearing (34) is fitted on the left end of the stirring shaft (15). The No. 4 deep groove bearing (35) and the No. 3 deep groove bearing (34) and the No. 4 deep groove bearing (35) are both fixedly mounted with an installation cylinder. The right end of the installation cylinder is fixedly mounted on the side wall of the storage container (3). A hole elastic retaining ring (33) is provided between the No. 3 deep groove bearing (34) and the No. 1 pulley (37). The hole elastic retaining ring (33) is sleeved on the No. 1 stirring shaft (15). A No. 3 oil seal (36) is provided between the No. 4 deep groove bearing (35) and the side wall of the storage container (3). The No. 3 oil seal (36) is sleeved at the connection between the No. 1 stirring shaft (15) and the side wall of the storage container (3). A No. 1 stirring gear (18) is sleeved on the No. 1 stirring shaft (15). (18) A second stirring gear (19) is meshed with the upper part. A second stirring shaft is fixedly inserted at the center of the second stirring gear (19). A first deep groove ball bearing (27) and a second deep groove bearing (30) are respectively sleeved on the left end of the second stirring shaft. The outer rings of the first deep groove ball bearing (27) and the second deep groove bearing (30) are fixedly installed on the inner wall of the gear guard (5). A first oil seal (26) is provided at the connection between the second stirring shaft and the side wall of the storage container (3). One end of the second stirring shaft passes through the side wall of the storage container (3) and extends into the storage container (3). A second stirring blade (21) is fixedly installed on the second stirring shaft. A second pulley is provided in the lower half of the gear guard (5).The second pulley is connected to the first pulley (37) by a transmission belt. A drive shaft (9) is fixedly installed at the center of the second pulley. The other end of the drive shaft (9) passes through the side wall of the storage container (3) and is fixedly installed with a main screw shaft. The other end of the main screw shaft passes through the other side of the storage container (3) and is equipped with an explosion-proof motor. A shielding cylinder is provided on the right end of the main screw shaft that extends out of the storage container (3). The shielding cylinder is fixedly installed on the side wall of the overall support (1). A discharge cylinder is provided at the lower end of the shielding cylinder. A gear (14) is fixedly installed on the drive shaft (9). The gear (14) meshes with the drive shaft. There is a gear (13), and a driven shaft (8) is fixedly installed at the center of the gear (13). The other end of the driven shaft (8) passes through the side wall of the storage container (3) and is fixedly installed with an auxiliary screw shaft. The other end of the auxiliary screw shaft is rotatably connected to the inner wall of the shielding cylinder. An activated carbon weighing device (38) is provided on the lower end face of the storage container (3). A second flat key (28) is provided between the gear (13) and the driven shaft (8). The second flat key (28) is fixedly connected to the gear (13) and the driven shaft (8). A second oil seal (29) is provided between the driven shaft (8) and the storage container (3).

2. The activated carbon weighing and metering feeding device for an environmental protection system according to claim 1, characterized in that, The auxiliary spiral shaft is rotatably connected to a first bushing (7) at one end away from the driven shaft (8), and the first bushing (7) is fixedly installed on the inner wall of the shielding cylinder.

3. The activated carbon weighing and metering feeding device for an environmental protection system according to claim 1, characterized in that, The right end of the shielding cylinder is provided with a flange (6), and the right end of the main spiral shaft passes through the right side of the flange (6) and is provided with an explosion-proof motor. The explosion-proof motor is fixedly installed on the side wall of the first bushing (7).

4. The activated carbon weighing and metering feeding device for an environmental protection system according to claim 1, characterized in that, A vertical cylinder is provided on the lower side wall of the right end of the shielding cylinder, and a ash conveying pipe (4) is provided at the lower end of the vertical cylinder. A sealing cap (22) is provided on the side wall of the ash conveying pipe (4).

5. The activated carbon weighing and metering feeding device for an environmental protection system according to claim 1, characterized in that, The drive shaft is rotatably connected to a second bushing (10) at one end inside the gear protective cover (5). The second bushing (10) is fixedly installed in the inner wall of the gear protective cover (5). The drive shaft is also rotatably connected to a third bushing (12) at one end inside the gear protective cover (5). A second flange (11) is fixedly installed on the third bushing (12). The second flange (11) is fixedly installed on the side wall of the storage container (3).

6. The activated carbon weighing and metering feeding device for an environmental protection system according to claim 1, characterized in that, A first flat key (25) is provided at one end of the first stirring shaft (15) opposite to the fastening bolt (23), and the fastening bolt (23) is threaded into the first flat key (25).

7. The activated carbon weighing and metering feeding device for an environmental protection system according to claim 1, characterized in that, The No. 1 stirring shaft (15) is rotatably connected to the No. 4 shaft sleeve (16), and the No. 4 shaft sleeve (16) is fixedly installed with a connecting plate (17), which is fixedly installed on the inner wall of the gear protective cover (5).

8. The activated carbon weighing and metering feeding device for an environmental protection system according to claim 1, characterized in that, The right end of the main spiral shaft is fixedly installed with a No. 3 flat key (31), and the other end of the No. 3 flat key (31) is fixedly installed at the output end of the explosion-proof motor.

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