Environment-friendly dust ash blending device

Abstract

The utility model belongs to flue gas cleaning technical field discloses an environmental protection type dust mixing burning device, including wet type electrostatic precipitator, dust conveying device, feeding device and combustion device, is equipped with uniform distribution subassembly in wet type electrostatic precipitator, and uniform distribution subassembly includes: uniform distribution board, uniform distribution board is located wet type electrostatic precipitator's air inlet top, uniform distribution hole is equipped on uniform distribution board, and uniform distribution hole is used for uniform distribution from the air inlet into the flue gas, the scheme flue gas first enters wet type electrostatic precipitator, and the uniform distribution board on the air inlet top rectifies the uneven flow flue gas caused by uniform distribution hole to L-shaped air inlet structure, lets the flue gas evenly flow through the electric field area, and the dust separated out is transported to the feeding device by the dust conveying device, and after the original coal etc. Main fuel is deployed, is sent into the combustion device and burns, realizes the resource utilization of dust, and the new flue gas produced in the combustion process enters the subsequent treatment system and purifies again, the utility model solves the uneven distribution of the existing wet type electrostatic precipitator flue gas problem.

Description

Technical Field

[0001] This solution belongs to the field of flue gas cleaning technology, specifically involving an environmentally friendly dust removal and ash co-firing device. Background Technology

[0002] Calcium carbide plants generate a large amount of dust during production, mainly composed of calcium carbide residue, unreacted raw materials, and trace amounts of metallic impurities. Currently, the methods for disposing of this dust are limited, mostly involving simple stockpiling or landfilling, which poses an environmental pollution risk. Some companies have attempted to burn it directly as low-quality fuel, but this has failed to fully realize its potential value and may generate secondary pollution.

[0003] In practical applications in thermal power plants, the co-firing of dust from flue gas first requires separating the dust and removing the ash from the flue gas using a wet electrostatic precipitator. The ash is then stored in a silo and transported to the co-firing device via a screw conveyor or bucket elevator. The co-firing device mixes the dust and ash with the main fuels such as raw coal and biomass in a specific ratio before sending it to the boiler or incinerator for combustion. The new flue gas generated during combustion needs to be thoroughly cleaned again using a wet electrostatic precipitator, desulfurization and denitrification devices, etc., so that the final emission of flue gas meets environmental protection standards.

[0004] A wet electrostatic precipitator with an adjustable air distribution device is disclosed in the existing publication (announcement) number CN109909067A. The precipitator includes an upper end cap, a shell, and a lower end cap. The shell contains an adjustable air distribution device. An air inlet is located on the lower side of the shell, and the adjustable air distribution device is located above the air inlet. The adjustable air distribution device includes an airflow distribution plate, a baffle plate, air distribution holes, an air hole adjustment rod, and a flame arrestor plate. The adjustable air distribution device has multiple sets of air distribution holes, each corresponding to a honeycomb anode tube. A flame arrestor plate is located outside the air distribution holes. The air distribution holes and the air hole adjustment rod are connected through the airflow distribution plate, which has two semi-circular holes corresponding to each air distribution hole.

[0005] For example, the aforementioned wet electrostatic precipitator, as per the instruction manual... Figure 1 As shown, its air inlet A and the casing form an "L" shape. When the flue gas enters the casing from the air inlet A, it passes through the "L"-shaped turning area. Its inherent inertia makes it difficult for it to change its flow direction with the pipe's rotation. The flue gas flow direction (as shown) Figure 1 (As indicated by the dashed arrow) mainly affects the area to the left of the center line of the electrostatic precipitator and part of the right side area (such as... Figure 1 (Region B in the middle), while near the right side of the shell (such as...) Figure 1 In a small portion of area C, there is less smoke. Therefore, the aforementioned airflow distribution plate cannot directly change the direction of the smoke flow, and its effect on uniform smoke flow is not good, resulting in uneven smoke distribution. Utility Model Content

[0006] The purpose of this solution is to provide an environmentally friendly dust collection and ash co-firing device to solve the problem of uneven flue gas distribution in existing wet electrostatic precipitators.

[0007] To achieve the above objectives, this solution provides an environmentally friendly dust collection and ash co-firing device, comprising a wet electrostatic precipitator, an ash conveying device, a feeding device, and a combustion device connected in sequence. The wet electrostatic precipitator is equipped with a uniform distribution component, which includes: A uniform distribution plate is fixedly disposed above the air inlet of the wet electrostatic precipitator; The uniform distribution holes are disposed through the uniform distribution plate and are used to uniformly distribute the flue gas entering from the air inlet.

[0008] The principle and effect of this scheme are as follows: the flue gas first enters the wet electrostatic precipitator. At this time, the uniform distribution plate above the air inlet rectifyes the uneven flow of flue gas caused by the L-shaped air inlet structure through its uniform distribution holes, so that the flue gas flows evenly through the electric field area, causing the dust particles to be charged and captured and separated. The separated dust is transported to the feeding device by the ash conveying device, and then mixed with the main fuel such as raw coal in a preset ratio and sent to the combustion device for combustion, realizing the resource utilization of the dust. The new flue gas generated during the combustion process needs to enter the subsequent treatment system (such as desulfurization and denitrification device, etc.) for further purification, and finally meets the emission standards.

[0009] Furthermore, the uniformly distributed holes include a first uniformly distributed hole and a second uniformly distributed hole, and the diameter of the first uniformly distributed hole is smaller than the diameter of the second uniformly distributed hole; the first uniformly distributed hole is located in the mainstream region of the flue gas flow path, and the second uniformly distributed hole is located in the edge region of the flue gas flow path.

[0010] The principle and effect of this scheme are as follows: Since there is a lot of flue gas and a high flow rate in the mainstream area, the first uniformly distributed orifice (small diameter) can increase the local resistance and slow down the flow rate. After too much flue gas accumulates on this side, some of the flue gas will flow to the edge area to increase the amount of flue gas in the edge area. Meanwhile, the flue gas is sparse and the flow rate is low in the edge area. The second uniformly distributed orifice (large diameter) can reduce the resistance to guide the flue gas diffusion, thereby allowing the flue gas to enter the electric field evenly.

[0011] Furthermore, the uniform distribution plate is provided with a partition for shielding the uniform distribution holes. The partition is a fan-shaped partition and is rotatably connected to the uniform distribution plate on the same axis. The partition is connected to a drive source for driving its rotation.

[0012] The principle and effect of this solution are as follows: Although different diameters of evenly distributed orifices can correspond to different flue gas flow sides, when the flue gas entering from the inlet has a relatively small flow rate and low velocity (e.g., during the initial startup phase of an electrostatic precipitator), the flue gas can directly pass through the first, smaller diameter evenly distributed orifice after entering from the inlet, and the flue gas will not flow excessively towards the second evenly distributed orifice. Therefore, this solution uses a baffle to block part of the evenly distributed orifice, and a drive source drives the baffle to rotate circumferentially around the center of the evenly distributed plate. When the flue gas flow rate is low, the baffle rotates slowly, resulting in a longer residence time in the first uniformly distributed hole area, partially blocking the first uniformly distributed holes. This causes the flue gas to be diverted to the second uniformly distributed holes in the edge area, preventing the flue gas from concentrating only in the mainstream area due to the small amount of flue gas. When the flue gas flow rate is high, the baffle rotates quickly, shortening the residence time in the first uniformly distributed hole area and reducing the duration of blocking the first uniformly distributed holes. Furthermore, through the cooperation between the baffle and the first uniformly distributed holes, when the flue gas flow rate is high, some gas can also flow to the second uniformly distributed hole area, achieving a uniform distribution of the flue gas flow field under different flow rate conditions.

[0013] Furthermore, the driving source includes a motor, a drive rod, and a guide rod. The output end of the motor is connected to a drive shaft. The free end of the drive shaft passes through the evenly distributed plate and the partition and is coaxially and fixedly connected to the drive rod. The free end of the drive rod is hinged to a sliding sleeve. One end of the guide rod is hinged to a bracket, and the free end passes through the sliding sleeve. The rotation center of the guide rod is offset from the rotation center of the drive rod. The guide rod is connected to a lever for driving the partition to rotate, and the free end of the lever abuts against the edge of the partition.

[0014] The principle and effect of this solution are as follows: Electrostatic precipitators contain a main flow area and an edge area, with the edge area being smaller. If the baffle rotates at the same speed in both the main flow and edge areas, the frequency of sweeping the edge area per unit time will be too high, while the frequency of sweeping the main flow area will be relatively low, resulting in poor guidance and distribution of the flue gas. Although a servo motor can be used as the drive source to control the baffle to rotate faster in the main flow area and slower in the edge area, frequent frequency conversion of the motor will not only significantly increase energy consumption, but also generally result in a delay in speed change at the critical position between the main flow and edge areas, leading to inaccurate speed control. Therefore, in this solution, the drive source is configured as described above. The drive shaft and drive rod driven by the motor constitute the active component. The drive rod is slidably hinged to the guide rod via a sliding sleeve. One end of the guide rod is hinged to the bracket and offset from the rotation center of the drive rod, creating an extreme position angle. Together, they form an offset transmission structure, with the guide rod acting as the driven component and also possessing quick-return characteristics. When the motor drives the drive shaft and drive rod to rotate at a constant speed, the guide rod slides within the sliding sleeve and abuts against the edge of the partition via the lever, causing the partition to rotate synchronously. During the stroke of the guide rod in the corresponding mainstream area, it needs to rotate through a larger angle in coordination with the drive rod. Because the drive component rotates at a constant speed, the guide rod rotates slowly and sweeps at a low frequency during this stage, thus guiding the flue gas in the mainstream area. In the stroke of the corresponding edge area, the guide rod rotates through a smaller angle in coordination with the drive rod, rotates faster, and sweeps at a higher frequency, adapting to the small area of ​​the edge area. Ultimately, this achieves uniform distribution of flue gas and allows the partition to remain slowly in the mainstream area and sweep quickly in the edge area without the need for motor frequency conversion. This avoids both the problem of poor flow uniformity at a fixed speed and the problems caused by frequent motor frequency conversion.

[0015] Furthermore, the partition plate has a groove, and a protrusion for cleaning the evenly distributed holes is slidably arranged in the groove. The end of the protrusion near the evenly distributed holes is tapered, and a spring is connected to the protrusion. The free end of the spring is fixedly connected to the groove.

[0016] The principle and effect of this solution are as follows: Since the uniform distribution holes are constantly exposed to dusty flue gas, dust particles in the flue gas easily adhere to the hole walls and gradually accumulate, even causing the hole diameter to shrink or become blocked, affecting the original flow uniformity. Therefore, this solution causes the partition plate to rotate synchronously, driving the protrusions in the groove. When the protrusions rotate with the partition plate to the position corresponding to the uniform distribution holes, they slide along the groove under the preload of the spring, and their conical ends insert into the uniform distribution holes to remove accumulated dust. After rotating away from the set of uniform distribution holes, the spring will stretch and deform with the sliding of the protrusions, pulling the protrusions back into the groove after cleaning, thus performing cyclic cleaning on subsequent uniform distribution holes.

[0017] Furthermore, the edge of the partition is provided with a protrusion, and the lever abuts against the protrusion.

[0018] The principle and effect of this solution are as follows: by using a lever to abut against the protrusion, the lever pushes the protrusion to drive the partition to rotate circumferentially; and since the guide rod will swing inside the sliding sleeve in the movement path, placing the protrusion at the edge of the partition will not affect its swing.

[0019] Furthermore, it also includes a spray assembly installed inside the wet electrostatic precipitator, and the spray assembly is located above the uniform distribution plate. The spray assembly includes a spray pipe and a rotary joint. The spray pipe is rotatably connected to the water outlet end of the rotary joint, and the water inlet end of the rotary joint is rotatably connected to a water inlet pipe. The free end of the water inlet pipe passes through the wet electrostatic precipitator and is connected to a water pump. The end of the spray pipe is connected to a support rod, and the free end of the support rod is fixedly connected to the edge of the uniform distribution plate.

[0020] The principle and effect of this solution are as follows: Since the spray assembly needs to be positioned above the distribution plate, although this invention improves the flue gas flow field through the distribution plate, the flue gas in the mainstream area will still be slightly more abundant than that in the edge area after passing through the distribution holes. Traditional rotating spray assemblies, due to the uniform nozzle opening, result in the same spraying time and range between the mainstream and edge areas, leading to over-spraying and media waste in the edge areas. While the nozzle opening and spray range in the edge areas can be reduced, to achieve a wider spray range, the spray pipe is generally designed to rotate circumferentially. This allows for wider spraying under centrifugal force when the spray medium rotates. However, rotating designs require uniform nozzle openings, still resulting in identical spraying in both areas and wasting spray medium. In this solution, the rotary joint allows the spray pipe to rotate around the rotary joint while the inlet pipe is fixed. The water pump supplies water to the spray pipe through the inlet pipe and the rotary joint. Because the spray pipe is fixedly connected to the edge of the distribution plate via a support rod, and the distribution plate rotates slower in the mainstream area and faster in the edge area through an offset transmission structure, this variable speed motion drives the spray pipe to rotate via the support rod. This results in the spray pipe rotating slower in the mainstream area, allowing for longer spraying time and more thorough coverage, while rotating faster in the edge area, shortening the spraying time and avoiding over-spraying and media waste. At the same time, the rotating spray pipe has centrifugal force, which eliminates the need to adjust the nozzle opening to achieve the desired spraying effect.

[0021] Furthermore, there are multiple spray pipes, and these multiple spray pipes are arranged in an overlapping and staggered manner along the central axis of the rotary joint.

[0022] The principle and effect of this solution is to improve the spraying effect through the above settings.

[0023] Furthermore, the top surface of the partition is an inclined slope.

[0024] The principle and effect of this solution are as follows: Since the spraying medium will drip down onto the baffle after spraying, in order to avoid excessive water accumulation on the baffle, the baffle is set as an inclined slope to guide the water flow away from the top surface of the baffle.

[0025] Furthermore, the partition plate has a through hole for the drive shaft to pass through; the radius of curvature of the edge of the partition plate is the same as the radius of curvature of the uniformly distributed plate; a sealing flange is provided on the outer circumference of the partition plate; a boss is provided on the edge of the partition plate, and the free end of the support rod is fixedly connected to the boss.

[0026] The principle and effect of this design are as follows: the through hole allows the drive shaft to pass through the partition plate, but the drive shaft does not drive the distribution plate or the partition plate to rotate; it only drives the drive rod to rotate. The radius of curvature of the partition plate edge is consistent with that of the distribution plate, allowing it to fit snugly against the distribution plate and reducing the gap between the edges. The sealing flange is used to fix the partition plate to the inner wall of the electrostatic precipitator, preventing flue gas from flowing through the gaps. The boss is used to support the support rod. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the existing technology; Figure 2 This is a schematic diagram of the structure of the wet electrostatic precipitator of the present invention; Figure 3 This is a schematic diagram of the internal structure of the uniform distribution component and the spraying component of the present invention located in a wet electrostatic precipitator. Figure 4 This is a front view of the uniform distribution plate, the first uniform distribution hole, and the second uniform distribution hole of the present invention; Figure 5 This is a front view of the uniform distribution component and the spraying component of the present invention; Figure 6 This is a schematic diagram of the structure of the uniform distribution component and the spraying component of the present invention; Figure 7 This is a schematic diagram of the structure of the driving source of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the structure of the driving source of the present invention. Figure 2 ; Figure 9 This is a top view of the driving source of the present invention.

[0028] Figure 10 This is a schematic diagram of the internal structure of the partition of the present invention.

[0029] The reference numerals in the accompanying drawings include: wet electrostatic precipitator 1, air inlet 11, uniform distribution assembly 2, uniform distribution plate 21, uniform distribution hole 22, first uniform distribution hole 221, second uniform distribution hole 222, partition 23, groove 231, protrusion 232, spring 233, protrusion 234, through hole 235, sealing flange 236, boss 237, drive source 24, motor 241, drive rod 242, guide rod 243, drive shaft 244, sliding sleeve 245, connecting rod 246, lever 247, spray assembly 3, spray pipe 31, rotary joint 32, water inlet pipe 33, and support rod 34. Detailed Implementation

[0030] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Example 1: Please see Figure 2 This embodiment provides an environmentally friendly dust collection and ash co-firing device, which improves upon existing technologies by optimizing the uniformly distributed holes. The overall structure of the dust collection and ash co-firing device is sequentially connected according to function, including a wet electrostatic precipitator 1, an ash conveying device, a feeding device, and a combustion device. The ash conveying device, feeding device, and combustion device are all existing technologies and will not be described in detail. The wet electrostatic precipitator 1 serves as the dust collection unit. Its internal structure is circular, with an air inlet 11 on the lower side of the shell. The air inlet 11 is connected to the dust-laden flue gas conveying pipeline of the calcium carbide plant via a flange. An ash hopper is located at the bottom of the shell, and the ash hopper outlet is connected to the ash conveying device via a chute. The ash conveying device uses a horizontal screw conveyor. The discharge end of the screw conveyor is connected to the feeding device via a chute. The feeding device is a belt-type weighing feeder, and its discharge end is connected to the inlet of the combustion device. The combustion device is a circulating fluidized bed boiler. The boiler's tail flue is sequentially connected to a desulfurization and denitrification device and an induced draft fan to ensure that the flue gas meets emission standards after combustion.

[0031] Please see Figure 3 and Figure 4The air inlet 11 forms an "L"-shaped airflow channel with the interior of the casing. The wet electrostatic precipitator 1 is equipped with a uniform distribution assembly 2, which includes a uniform distribution plate 21 and uniform distribution holes 22. The uniform distribution plate 21 is disc-shaped and made of 304 stainless steel. It is fixedly installed on the inner wall of the casing above the air inlet 11 via a sealing flange 236 to prevent flue gas from short-circuiting through the gap. The diameter of the uniform distribution plate 21 is adapted to the cross-sectional dimensions of the wet electrostatic precipitator 1, ensuring that the flue gas enters the upper electric field region through the uniform distribution holes 22 on the plate 21. The uniform distribution holes 22 are circular through holes penetrating the uniform distribution plate 21. Functionally, they are divided into a first uniform distribution hole 221 and a second uniform distribution hole 222. The diameter of the first uniform distribution hole 221 is set to 5-10 mm, and the diameter of the second uniform distribution hole 222 is set to 15-20 mm. Both types of uniform distribution holes are arranged in an array. The first uniformly distributed holes 221 are located on the uniformly distributed plate 21 in the area corresponding to the mainstream flue gas path of the inlet 11, covering an area of ​​approximately 5 / 6. This area is the core region where the flue gas flows directly after entering the inlet 11, and it is also the area with the largest flue gas flow. The second uniformly distributed holes 222 are located on the right side of the uniformly distributed plate 21, covering an area of ​​approximately 1 / 6, corresponding to the edge region of the flue gas flow path, where the flue gas volume is naturally small. When the dust-laden flue gas enters the wet electrostatic precipitator 1 from the inlet 11, a large amount of flue gas in the mainstream region first comes into contact with the first uniformly distributed holes 221. Due to the small diameter of the first uniformly distributed holes 221, a large flow resistance is formed, which slows down the flue gas flow velocity in this region. As the flue gas pressure in the mainstream region gradually increases, some flue gas will be diverted to the edge region where the resistance is smaller. The second uniformly distributed hole 222 in the edge area has a larger diameter and lower flow resistance, which can smoothly receive the diverted flue gas, thereby improving the uniform diffusion of flue gas to the entire coverage area of ​​the uniformly distributed plate 21. This allows the originally unevenly distributed flue gas to be rectified by the first and second uniformly distributed holes 221 and form a uniform flow field before entering the upper electric field, improving dust removal efficiency. The separated dust is conveyed by an ash conveying device (using a screw conveyor) to a feeding device (weighing feeder), mixed with raw coal in a preset ratio, and then fed into a combustion device (circulating fluidized bed boiler) for complete combustion, achieving resource utilization. The new flue gas generated by combustion is then deeply purified by subsequent desulfurization and denitrification devices before being discharged in compliance with standards, avoiding secondary pollution.

[0032] Example 2: The difference between this embodiment and the previous embodiment is that the uniformly distributed holes 22 are uniformly distributed holes with the same diameter, and a baffle 23, a drive source 24 and a spray assembly 3 are added on the basis of embodiment one to improve the flow and spraying of flue gas.

[0033] Please see Figure 3 , Figures 5-8The structure of the uniform distribution plate 21 is the same as in Embodiment 1. A pre-drilled mounting hole for the drive shaft 244 to pass through is provided at its center. The partition plate 23 has a fan-shaped structure and is coaxially rotatably connected to the uniform distribution plate 21 via a deep groove ball bearing. The outer ring of the bearing is fixed to the inner wall of the central mounting hole of the uniform distribution plate 21, and the inner ring of the bearing engages with the central bushing of the partition plate 23, allowing the partition plate 23 to move in a circular motion around the center of the uniform distribution plate 21. A through hole 235 for the drive shaft 244 to pass through is provided at the central bushing of the partition plate 23. The diameter of the through hole 235 is 2-3 mm larger than that of the drive shaft 244. The drive source 24 uses a motor 241, which is a three-phase asynchronous motor electrically connected to a speed controller. The motor 241 is fixedly installed below the uniform distribution plate 21 and is fixedly installed inside the wet electrostatic precipitator 1 via a bracket (not shown). A protective sleeve or other structure can be fitted over the motor 241 to prevent dust or spray media from entering the motor 241. The output end of the motor 241 is connected to the drive shaft 244 via a coupling. The free end of the drive shaft 244 passes through the mounting hole in the center of the uniformly distributed plate 21 and the through hole 235 of the partition plate 23 in sequence, and is coaxially welded and fixed to one end of the drive rod 242. The free end of the drive rod 242 is hinged to the sliding sleeve 245 via a pin. The inner diameter of the sliding sleeve 245 is 0.2-0.3 mm larger than that of the guide rod 243, and a groove (not shown) is provided on the inner wall of the hole to reduce sliding friction. The guide rod 243 is longer than the drive rod 242, and one end is hinged to a connecting rod 246. A horizontally arranged connecting rod 246 is fixedly connected to the connecting rod 246. A vertically arranged connecting rod 246 is hinged to the horizontally arranged connecting rod 246. The free end of the vertically arranged connecting rod 246 is fixedly connected to the wet electrostatic precipitator 1 via a bracket (not shown). In this embodiment, the free end of the vertically arranged connecting rod 246 is connected to the outer shell of the rotary joint 32. The outer shell of the rotary joint 32 remains stationary, supporting the connecting rod 246, thus guiding the... One end of the guide rod 243 can rotate around the hinge point between the guide rod 243 and the connecting rod 246. It should be noted that the outer shell of the rotary joint 32 is fixed to the inner wall of the wet electrostatic precipitator 1 by a bracket, maintaining a static and fixed state. This allows the horizontal connecting rod 246 to rotate around the vertically arranged connecting rod 246 (with the same center as the uniformly distributed plate 21), with the rotation center located at the lower part of the rotary joint 32. Furthermore, during movement, it will not misalign with the drive rod 242, guide rod 243, and connecting rod 246, preventing jamming. The rotation center of the guide rod 243 is eccentrically set with the rotation center of the drive shaft 244. The free end of the guide rod 243 passes through the inner hole of the sliding sleeve 245, forming a composite motion of "sliding + oscillating," thus constituting an offset transmission structure. A lever 247 is vertically welded to the bottom surface of the guide rod 243 near its free end. The lever 247 tightly abuts against the protrusion 234 on the edge of the partition 23, allowing the lever 247 to push the partition 23 to rotate.

[0034] Please continue reading. Figure 3 , Figures 5-8 When the motor 241 drives the drive shaft 244 to rotate at a constant speed, the drive rod 242 moves in a circular motion around its rotation center along with the drive shaft 244, and the sliding sleeve 245 at its free end synchronously drives the guide rod 243 to move. Because there is an offset distance between the rotation center of the guide rod 243 and the rotation center of the drive shaft 244, the guide rod 243, driven by the sliding sleeve 245, will simultaneously slide along the axial direction of the inner hole of the sliding sleeve and swing around its own hinge point. Furthermore, during one revolution of the drive rod 242, the angular velocity of the guide rod 243 exhibits a periodic difference: when the drive rod 242 rotates to the side closest to the rotation center of the guide rod 243 (i.e., the "near-resting segment"), the drive rod 242 pushes the sliding sleeve 245 a longer distance along the axial direction of the guide rod 243, and the angle change of the guide rod 243 around the hinge point becomes gentler, with the angular velocity decreasing to 5-8° / s. At this time, the speed at which the lever 247 pushes the partition 23 to rotate along the center of the distribution plate 21 decreases synchronously, causing the partition 23 to rotate in the mainstream area of ​​the distribution plate 21 (e.g., ...). Figure 9 The dwell time in the T1 area is extended, fully shielding part of the first uniformly distributed hole 221 to guide the flue gas diversion; when the drive rod 242 rotates to the side away from the rotation center of the guide rod 243 (i.e., the "far resting section"), the distance by which the drive rod 242 pulls the sliding sleeve 245 to slide along the axial direction of the guide rod 243 is shortened, the angle of the guide rod 243 swinging around the hinge point changes drastically, and the angular velocity increases to 15-20° / s. The lever 247 pushes the partition plate 23 to rotate faster, so that the partition plate 23 quickly sweeps across the edge area of ​​the uniformly distributed plate 21 (e.g., Figure 9 In the T2 region, excessive diversion of flue gas in the edge region is avoided. This slow-to-fast alternating oscillation characteristic, achieved through the offset transmission structure of the drive rod 242 and guide rod 243, eliminates the need for frequency conversion speed regulation of the motor 241. This allows the partition 23 to automatically adapt its speed in different regions, meeting the flue gas flow requirements of the mainstream and edge regions while reducing motor losses and transmission delays. It should be noted that since the distribution plate 21 needs to correspond to both the mainstream and edge flue gas sides of the wet electrostatic precipitator 1, those skilled in the art can adapt the lengths of the drive rod 242 and guide rod 243, as well as the extreme position angle between them (e.g., ...). Figure 9 Make corresponding adjustments (T°) so that the rotation path of the drive rod 242 can be exactly corresponding Figure 9 Middle T1 area (mainstream flue gas side) and Figure 9 The T2 region (edge ​​flue gas side) is such that the partition 23 can correspond to the T1 region and the T2 region.

[0035] Please see Figure 10The top surface of the partition 23 is machined into a 10-15° inclined slope, with the lower end of the slope facing the edge of the uniform distribution plate 21. This allows the dripping medium after spraying to flow along the inclined slope into the edge of the uniform distribution plate 21, and then into the ash hopper through the guide groove on the inner wall of the shell, preventing water accumulation and dust agglomeration. The partition 23 has several rectangular grooves 231 evenly distributed radially, with the width matching the protrusions 232. The spring 233 is a cylindrical compression spring, with one end embedded in the positioning hole of the groove 231 and fixed with glue, and the other end fixedly connected to the protrusion 232. The protrusion 232 is made of wear-resistant rubber, and the end near the uniform distribution hole 22 is machined into a 30° cone-shaped structure. The protrusion 232 slides against the inner wall of the groove 231. In its natural state, the spring 233 is in a pre-compressed state, so that the cone-shaped end of the protrusion 232 extends 2-3mm out of the groove 231, ensuring smooth insertion when aligned with the uniform distribution hole 22.

[0036] Please see Figure 3 , Figure 5 and Figure 6 The spray assembly 3 includes a spray pipe 31, a rotary joint 32, a water inlet pipe 33, an external water pump, and a support rod 34. It is linked to the uniformly distributed assembly 2 via a boss 237 on the edge of the partition 23. The rotary joint 32 is a high-pressure rotary joint. Its inlet end is connected to the water inlet pipe 33 via a flange, while its outlet end is rotatably connected to the spray pipe 31, allowing the spray pipe 32 to rotate circumferentially around the rotary joint 32 while the rotary joint 32 remains stationary. The water inlet pipe 33 is a seamless 304 stainless steel pipe. One end of the water inlet pipe 33 passes through the wet electrostatic precipitator 1 and extends to the outside of the casing, where it is connected to the water pump outlet via a flange. The selected ISG type vertical centrifugal pump allows water to flow through the water inlet pipe 33 and the rotary joint 32 before being sprayed from the spray holes of the spray pipe 31. The spray pipe 31 has spray holes with a diameter of 2-3 mm evenly distributed along its length. There are two spray pipes 31, and the two spray pipes 31 are arranged in an overlapping and staggered manner along the central axis of the rotary joint 32: the circumferential angle between two adjacent spray pipes 31 is 90°. The support rod 34, as the linkage component between the spray pipe 31 and the partition plate 23, is made of 304 stainless steel. One end of the support rod is welded and fixed to the end of one of the spray pipes 31, and the other end is fixedly connected to the boss 237 on the edge of the partition plate 23 by bolts. The boss 237 is an integrally formed structure of the edge of the partition 23, and the surface is opened with threaded holes for connection through the support rod 34. The spray pipe 31 can move synchronously with the rotation of the partition 23. Combined with the previous characteristic of the partition 23 that "rotates slowly in the mainstream area and rotates quickly in the edge area", the spray pipe 31 also exhibits differentiated rotation speed: in the mainstream area with a large amount of flue gas, the spray pipe 31 rotates slowly and the spraying time is extended; in the edge area with a small amount of flue gas, the spray pipe 31 rotates quickly and the spraying time is shortened. At the same time, the centrifugal force generated by the rapid rotation can further expand the coverage of the atomized droplets.

[0037] In this embodiment, the motor 241 drives the drive shaft 244 to rotate at a constant speed, which in turn drives the drive rod 242 and the sliding sleeve 245 to move. Because the guide rod 243 is offset from the drive rod 242, the guide rod 243 exhibits a quick-return characteristic. Through the lever 247, the baffle 23 rotates slowly in the mainstream area and quickly in the edge area to adapt to the flow equalization requirements of flue gas with different flow rates. During the rotation of the baffle 23, the protrusion 232 is inserted into the uniform distribution hole 22 under the action of the spring to clean the accumulated dust and prevent blockage. The spray pipe 31 rotates with the baffle 23 at a variable speed through the support rod 34. The spray time in the mainstream area is longer and the time in the edge area is shorter to avoid wasting the spray medium. Multiple staggered spray pipes 31 combine with centrifugal force to expand the coverage area and improve the purification effect.

[0038] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An environmentally friendly dust collection and ash co-firing device, comprising a wet electrostatic precipitator (1), an ash conveying device, a feeding device, and a combustion device connected in sequence, wherein the wet electrostatic precipitator (1) is provided with a uniform distribution component (2), characterized in that, The uniformly distributed component (2) includes: A uniform distribution plate (21) is fixedly installed above the air inlet (11) of the wet electrostatic precipitator (1); The uniform distribution hole (22) is provided through the uniform distribution plate (21) and is used to uniformly distribute the flue gas entering from the air inlet (11).

2. The environmentally friendly dust removal and ash co-firing device according to claim 1, characterized in that: The uniformly distributed holes (22) include a first uniformly distributed hole (221) and a second uniformly distributed hole (222), and the diameter of the first uniformly distributed hole (221) is smaller than the diameter of the second uniformly distributed hole (222); the first uniformly distributed hole (221) is located in the mainstream area of ​​the flue gas flow path, and the second uniformly distributed hole (222) is located in the edge area of ​​the flue gas flow path.

3. The environmentally friendly dust removal and ash co-firing device according to claim 1, characterized in that: The uniform distribution plate (21) is provided with a partition (23) for shielding the uniform distribution holes (22). The partition (23) is a fan-shaped partition (23) and is coaxially rotatably connected to the uniform distribution plate (21). The partition (23) is connected to a drive source (24) for driving its rotation.

4. The environmentally friendly dust removal and ash co-firing device according to claim 3, characterized in that: The drive source (24) includes a motor (241), a drive rod (242), and a guide rod (243). The output end of the motor (241) is connected to a drive shaft (244). The free end of the drive shaft (244) passes through the uniformly distributed plate (21) and the partition (23) and is coaxially fixedly connected to the drive rod (242). The free end of the drive rod (242) is hinged to a sliding sleeve (245). One end of the guide rod (243) is hinged to the bracket, and the free end passes through the sliding sleeve (245). The rotation center of the guide rod (243) is offset from the rotation center of the drive rod (242). The guide rod (243) is connected to a lever (247) for driving the partition (23) to rotate, and the free end of the lever (247) abuts against the edge of the partition (23).

5. The environmentally friendly dust removal and ash co-firing device according to claim 3, characterized in that: The partition (23) has a groove (231), and a protrusion (232) for cleaning the uniformly distributed hole (22) is slidably provided in the groove (231). The end of the protrusion (232) near the uniformly distributed hole (22) is conical. A spring (233) is connected to the protrusion (232), and the free end of the spring (233) is fixedly connected to the groove (231).

6. The environmentally friendly dust removal and ash co-firing device according to claim 4, characterized in that: The edge of the partition (23) is provided with a protrusion (234), and the lever (247) abuts against the protrusion (234).

7. The environmentally friendly dust removal and ash co-firing device according to claim 4, characterized in that: It also includes a spray assembly (3) installed in the wet electrostatic precipitator (1), and the spray assembly (3) is located above the uniform distribution plate (21). The spray assembly (3) includes a spray pipe (31) and a rotary joint (32). The spray pipe (31) is rotatably connected to the water outlet end of the rotary joint (32). The water inlet end of the rotary joint (32) is rotatably connected to a water inlet pipe (33). The free end of the water inlet pipe (33) passes through the wet electrostatic precipitator (1) and is connected to a water pump. The end of the spray pipe (31) is connected to a support rod (34). The free end of the support rod (34) is fixedly connected to the edge of the uniform distribution plate (21).

8. The environmentally friendly dust removal and ash co-firing device according to claim 7, characterized in that: The number of spray pipes (31) is multiple, and the multiple spray pipes (31) are arranged in an overlapping and staggered manner along the central axis of the rotary joint.

9. The environmentally friendly dust removal and ash co-firing device according to claim 7, characterized in that: The top surface of the partition (23) is an inclined slope.

10. The environmentally friendly dust removal and ash co-firing device according to claim 8, characterized in that: The partition (23) has a through hole (235) through which the drive shaft (244) passes; the radius of curvature of the edge of the partition (23) is the same as the radius of curvature of the uniformly distributed plate (21); the outer circumference of the partition (23) is provided with a sealing flange (236); the edge of the partition (23) is provided with a boss (237), and the free end of the support rod (34) is fixedly connected to the boss (237).

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