A municipal solid waste incineration slag treatment system and wastewater recycling equipment

Abstract

This invention relates to the field of environmental protection equipment, providing a municipal solid waste incineration slag treatment system and wastewater recycling equipment. The wastewater recycling equipment includes: a grab bucket sand removal device for removing sedimented sludge from the wastewater used for washing municipal solid waste incineration slag, yielding first filtered wastewater; a bar screen device for filtering the first filtered wastewater, yielding second filtered wastewater; a water collection device for collecting and storing the second filtered wastewater; a sedimentation device for sedimenting the second filtered wastewater, yielding reclaimed water and settled sludge; a sludge collection device connected to the sedimentation device for collecting and storing settled sludge; and a reclaimed water collection device connected to the sedimentation device for collecting and storing reclaimed water. By treating the wastewater from washing municipal solid waste incineration slag using this wastewater recycling equipment, reclaimed water and brick-making raw materials are obtained, avoiding pollution of the natural environment caused by wastewater discharge and conserving resources.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection equipment, and in particular relates to a municipal solid waste incineration slag treatment system and wastewater recycling equipment. Background Technology

[0002] As people's living standards continue to improve, the rate of household waste generation is also increasing. Currently, my country's overall requirements for household waste treatment rates are constantly rising. This is mainly due to the rapid urbanization process, leading to a continuous increase in the amount of urban household waste generated, while waste treatment capacity lags behind. Therefore, further accelerating the efficiency of household waste treatment has become a direction that my country has been encouraging and guiding. In recent years, influenced by policy guidance, scarce land resources, profit margin advantages, and the aforementioned governance efficiency, my country's waste incineration industry has experienced rapid development. The main method of household waste treatment will gradually shift from sanitary landfill to incineration, and the proportion of landfill disposal will continue to decline. Landfills will mainly be used for special waste disposal or emergency purposes, and the amount of raw household waste going to landfills will significantly decrease and tend towards zero landfill.

[0003] Incineration of municipal solid waste produces a large amount of ash, and how to further treat this ash in an environmentally friendly manner is a key aspect of waste management. However, the further processing of municipal solid waste incineration ash generates a large amount of washing wastewater, which, if not effectively treated, will cause serious secondary pollution. Summary of the Invention

[0004] The purpose of this application is to provide a wastewater recycling device for a municipal solid waste incineration slag treatment system, which aims to solve the problem of how to treat the cleaning wastewater from municipal solid waste incineration slag.

[0005] This application embodiment is implemented as follows: a wastewater recycling device includes:

[0006] The grab bucket sand removal device is used to remove sediment and sand from the wastewater from the washing of municipal solid waste incinerator slag to obtain the first filtered wastewater.

[0007] A bar screen is used to filter the first filtered wastewater to obtain the second filtered wastewater.

[0008] A water collection device is connected to the bar screen device to collect and store the second filtered wastewater;

[0009] A sedimentation device, connected to the water collection device, is used to treat the second filtered wastewater by sedimentation to obtain recycled water and settled sludge;

[0010] A sludge collection device, connected to the sedimentation device, is used to collect and store the settled sludge; and

[0011] A recycled water collection device is connected to the sedimentation device to collect and store the recycled water for reuse in production.

[0012] Another objective of this application is to provide a municipal solid waste incineration ash treatment system, comprising:

[0013] Slag pretreatment equipment is used for screening, crushing, magnetic separation, and jigging of municipal solid waste incineration slag; and

[0014] The water recycling equipment is used to recycle the wastewater from the washing of municipal solid waste incineration slag generated by the slag pretreatment equipment.

[0015] The wastewater recycling equipment provided in the above embodiments of this application effectively filters and purifies the wastewater from the washing of municipal solid waste incineration slag through multiple devices such as a grab sand dredging device, a bar screen device, a water collection device, a sedimentation device, a sludge collection device, and a recycled water collection device. Recycled water and brick-making raw materials can be obtained. On the one hand, this avoids the direct discharge of wastewater and pollution to the natural environment, and achieves zero discharge. On the other hand, it also saves natural resources. Attached Figure Description

[0016] Figure 1 A block diagram of a wastewater recycling device provided in this application embodiment;

[0017] Figure 2 A side view of the grille device provided in the embodiments of this application;

[0018] Figure 3 This is a structural diagram of the brush roller assembly provided in an embodiment of this application;

[0019] Figure 4 A cross-sectional view of the brush roller assembly structure along the AA direction is provided for embodiments of this application;

[0020] Figure 5 A simplified kinematic diagram of the brush roller assembly projected axially according to an embodiment of this application;

[0021] Figure 6 A simplified diagram of the motion of the brush roller assembly provided in the embodiments of this application, when it includes a wedge-shaped baffle, along the axial projection.

[0022] Figure 7 This is a structural diagram of the brush rod bracket provided in the embodiments of this application when it is a spoke frame structure;

[0023] Figure 8 This is a structural diagram of the brush rod bracket provided in the embodiments of this application when it is a disc-mounted structure;

[0024] Figure 9This is a structural diagram of the brush roller assembly when the brush rod bracket provided in the embodiment of the application is a disc-mounted structure;

[0025] Figure 10 A block diagram of a municipal solid waste incineration slag treatment system provided in an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0028] This application provides a wastewater recycling device that filters and treats the cleaning wastewater from municipal solid waste incineration slag through the combined use of a grab bucket slag removal device, a bar screen device, a water collection device, a sedimentation device, a sludge collection device, and a recycled water collection device. This not only avoids pollution to the natural environment but also turns waste into treasure, obtaining reusable water resources and solid materials.

[0029] The specific implementation of this application will be described in detail below with reference to specific embodiments.

[0030] In one embodiment of this application, such as Figures 1-8 As shown (see details) Figure 1 The invention provides a wastewater recycling device, comprising:

[0031] The grab bucket slag removal device 100 is used to filter the sediment and sand in the wastewater from the washing of municipal solid waste incinerator slag to obtain the first filtered wastewater.

[0032] The bar screen device 200 is used to filter the first filtered wastewater, remove suspended solids and large impurities from the wastewater, and obtain the second filtered wastewater.

[0033] The water collection device 300 is connected to the bar screen device 200 to collect and store the second filtered wastewater;

[0034] The sedimentation device 400 is connected to the water collection device 300 and is used to perform sedimentation treatment on the second filtered wastewater to obtain recycled water and sedimented sludge.

[0035] A sludge collection device 500, connected to the sedimentation device 400, is used to collect and store the settled sludge; and

[0036] The recycled water collection device 600 is connected to the sedimentation device 400 and is used to collect and store the recycled water for reuse in production.

[0037] In this embodiment, the sludge and sediment in the wastewater storage tank of municipal solid waste incineration slag washing wastewater in the wastewater pond are first removed by the grab bucket slag removal device 100 to obtain the first filtered wastewater. At this time, the first filtered wastewater contains a large amount of suspended solids and large impurities. The grab bucket slag removal device 100 can be a crane grab bucket. Then, the suspended solids and large impurities in the first filtered wastewater are filtered by the bar screen device 200 to obtain the second filtered wastewater. The second filtered wastewater generally contains a large amount of foam, which can be treated by adding a defoamer in the water collection device (i.e., the water collection tank). Smaller suspended solids, turbidity, and organic matter need to be treated by the sedimentation device through the sedimentation process; thus, recycled water and settled sludge are obtained, which are stored separately for recycling in the next stage. The sedimentation device 400 is a sedimentation tank. In this embodiment, a two-stage sedimentation tank is used. The second filtered wastewater, after defoaming treatment in the collection tank, is pumped to the sedimentation tank. Then, chemical agents such as polyaluminum chloride and polyacrylamide are added to the sedimentation tank to flocculate the suspended solids, turbidity and organic matter in the water, so as to facilitate the sedimentation and filtration of these impurities.

[0038] The recycled water collection device 600 is a recycled water tank that stores recycled water that has been treated by a sedimentation process for reuse in production. The sludge collection device 500 is a sludge tank. After static settling, thickening and compaction, the sludge tank is divided into a supernatant, a settling zone and a sludge layer. The supernatant is periodically extracted and returned to the sedimentation tank for reprocessing. The thickened sludge is discharged from the bottom sludge hopper. After being filtered by a filter press, a sludge cake with low water content is obtained, which can be recycled as a raw material for brick making.

[0039] After the wastewater from the washing of municipal solid waste incineration slag is treated by the wastewater recycling equipment provided in the above embodiments of this application, it can be used to obtain reusable water and brick-making raw materials, thus avoiding the pollution of the natural environment caused by the direct discharge of the wastewater.

[0040] In one embodiment of this application, a bar screen is used in a wastewater treatment device to continuously remove impurities from the wastewater. It is an indispensable device for solid-liquid separation of wastewater during the treatment of municipal solid waste incineration slag. When the bar screen performs solid-liquid separation, a large amount of solid waste will adhere to its mesh. If it is not cleaned in time, it will not only greatly reduce the flow rate of water through the bar screen, but also reduce the treatment rate of the slag wastewater treatment system.

[0041] As one embodiment of this application, such as Figure 2 As shown, the grille device 200 includes:

[0042] Grille body 210;

[0043] A rotary grid assembly 220 is disposed in the grid body 210, and the lower part of the rotary grid assembly 220 is inclinedly disposed in the water inlet channel;

[0044] A first driving component 230 that drives the rotary grid assembly 220 to move;

[0045] A brush roller assembly 240 disposed on the inner side of the top of the grid device is used to scrape off solid waste adhering to the rotary grid assembly 220; and

[0046] Storage bin 250 is used to collect the scraped solid waste.

[0047] In this embodiment, the bar screen 200 is inclinedly installed on the main gravity flow channel before the water collection device / collection tank to block and intercept suspended solids and large impurities in the first filtered wastewater, so as to prevent subsequent valves, pipes, water pumps and other subsequent treatment equipment from being blocked or damaged.

[0048] In this embodiment, the bar screen body 210 includes a connection mechanism connected to the ground, a housing supporting the various components of the bar screen device, and various auxiliary components. The bar screen body 210 has a receiving housing for installing the rotary bar screen assembly 220, which extends obliquely into the water channel together with the rotary bar screen assembly 220.

[0049] The rotary screen assembly 220 is equipped with rotary rollers 221 at both its upper and lower ends to drive the screen 222 to rotate. During operation, the lower side of the rotary screen assembly is positioned on the main inflow channel. By driving the screen 222 to rotate, suspended solids and large impurities in the first filtered wastewater are continuously carried upwards. These are then discharged from the upper part of the rotary screen assembly 220 and fed into the storage bin 250. In addition, the rotary screen assembly 220 also has other auxiliary mechanisms, such as guide rollers for changing the arrangement direction of the rotary screen assembly 220, and related fixing structures.

[0050] In this embodiment, the rotary grid assembly 220 is driven by a first driving component 230, which includes a motor, a gearbox, a motor control module, etc., and drives the rotary roller 221 of the rotary grid assembly, thereby causing the rotary grid assembly 220 to generate rotary motion.

[0051] In this embodiment, the grid device 200 is further provided with a brush roller assembly 240 for scraping off large pieces of solid waste attached to the grid. The brush roller assembly 240 is located on the discharge side above the rotary grid assembly 220 and is lower than the discharge position at the top of the rotary grid assembly 220.

[0052] The wastewater recycling equipment provided in this embodiment has a brush roller assembly 240 for scraping material on its bar screen device 200. Compared with the traditional bar screen device that relies solely on gravity for material feeding, the brush roller assembly 240 in this embodiment can provide an additional scraping process during material feeding. On the one hand, it can improve the feeding efficiency, and on the other hand, it can efficiently scrape off the solid waste attached to the bar screen to avoid the attached solid waste affecting the filtration effect of the bar screen.

[0053] In one embodiment of this application, such as Figures 2-5 As shown, the brush roller assembly 240 specifically includes:

[0054] The brush roller shaft 241 is rotatably mounted on the upper part of the bar screen body 210;

[0055] Two sets of brush rod supports 242 are mounted on the brush roller shaft 241. Several rotatable brush rods 243 are arranged between the two sets of brush rod supports 242. Each brush rod 243 is fixed with multiple sets of brush teeth 244 perpendicular to the brush rod 243 for scraping the mesh. The brush rods 243 are arranged parallel to the brush roller shaft 241 and are evenly distributed on a cylindrical surface with the brush roller shaft 241 as the axis and a set distance as the radius. Each brush rod 243 is fixedly connected at one end to a set of crank mechanisms 245 perpendicular to it. The other end of the crank mechanism 245 is rotatably connected to a roller 246. The rotation axis of the roller 246 is parallel to the axis of the brush rod 243.

[0056] A cam slide rail mechanism 247 is provided on the grille body 210, and the roller 246 is slidably disposed in the cam linear track of the cam slide rail mechanism 247; and

[0057] The second drive component 248 is used to drive the brush roller shaft 241 to rotate.

[0058] In this embodiment, two sets of shaft mounting seats can be provided on the grid body 210 for mounting the brush roller shaft 241. The mounting seat can be a molding structure of the grid body 210 itself, or a mounting structure fixedly installed on the grid body 210.

[0059] In addition, the brush roller shaft 241 is driven by a second drive component 248; wherein the second drive component 248 includes a motor and a motor gearbox, as well as a related control module.

[0060] In this embodiment, the brush rod bracket 242 is located at the end of the brush roller shaft 241 near the end, and the specific distance is set according to the actual working conditions; two sets of brush rod brackets 242 (relative to the middle cross section of the brush roller shaft 241) are provided at both ends of the brush roller shaft 241.

[0061] The number of scraping brush rods 243 installed between the two sets of brush rod brackets 242 is determined according to the actual working conditions, and the number can generally be set to 4 to 16 sets. The brush rods 243 are connected to the brush rod brackets 242 at both ends by rotating / rolling bearings, so that they can rotate relative to the brush rod brackets 242.

[0062] In this embodiment, the brush rods 243 are arranged parallel to the brush roller shaft 241 and are evenly distributed on a cylindrical surface with the brush roller shaft 241 as the axis and a set distance as the radius. In cross-section, each brush rod 243 is distributed on a circumference with the center of the brush roller shaft 241 as the center and a set distance as the radius. This set distance can be determined based on the actual size of the brush roller assembly and the specific working conditions of the scraping process.

[0063] In this embodiment, each brush rod 243 is fixed with a plurality of brush teeth 244 perpendicular to the brush rod 243. The brush teeth 244 are used to scrape off solid waste adhering to the grid. The number of brush teeth 244 on each brush rod 243 is determined according to the grid hole density. For example, each brush tooth can be set to correspond to one hole. Preferably, the brush teeth 244 are detachably connected to the brush rod 243, which allows the number of brush teeth 244 to be adjusted according to actual working conditions and facilitates the maintenance and replacement of the brush teeth 244.

[0064] In this embodiment, one end of each brush rod 243 is fixedly connected to a set of crank mechanisms 245 perpendicular to it, and the other end of the crank mechanism 245 is rotatably connected to a roller 246, the rotation axis of which is parallel to the axis of the brush rod 243. It is understood that all brush rods 243 are fixedly connected to the same end of the aforementioned crank mechanism 245, and the crank mechanism 245 and the brush rod 243 are preferably arranged perpendicularly to achieve the best torque transmission effect.

[0065] In this embodiment, the cam slide rail mechanism 247 is disposed on the grid body 210 at the end of the brush roller shaft 241. Each crank mechanism 245 is provided with a roller 246 at the other end. The roller 246 is disposed in the cam slide rail mechanism 247 at the corresponding end and can slide or roll freely in the track of the cam slide rail mechanism 247.

[0066] In this embodiment, when the brush roller shaft 241 rotates, the brush rod 243 is driven to perform circular motion through the brush rod bracket 242. The roller 246 slides in the cam slide rail mechanism 247 under the traction of the brush rod 243 through the crank mechanism 245. The walking state of the roller 246 along the cam slide rail mechanism 247 will be fed back to the corresponding brush rod 243 through the crank mechanism 245, causing it to rotate. As a result, the brush teeth 244 on the brush rod 243 will produce a corresponding swing posture due to the rotation of the brush rod 243.

[0067] In this embodiment, Figure 4 , 5 In the diagram, trajectory P is the trajectory line of the brush rod's circular motion, and Q is the travel trajectory line of the roller (that is, the track trajectory line of the cam slide rail mechanism).

[0068] In the above embodiments of this application, a brush roller assembly with a cam crank mechanism (i.e., crank mechanism, roller, cam slide rail mechanism) is provided, which can make the brush bar rotate around the brush roller axis while being adjusted by the crank cam mechanism to generate its own rotation, so that the brush teeth on the brush bar can generate a specific oscillating posture, thereby meeting a wider variety of scraping requirements.

[0069] In one embodiment of this application, the included angle between the crank mechanism 245 and the brush teeth 244 projected along the length of the brush handle 243 can be set to a range of 30° to 120°. For example... Figure 4 As shown, in this embodiment, 90° is selected as the optimal included angle, which can simplify the design of the cam trajectory.

[0070] In one embodiment of this application, to ensure smooth material feeding after scraping by the brush roller assembly, the track trajectory of the cam slide rail mechanism is configured to include the following sequentially connected segments: scraping segment, feeding segment, adjustment segment, and avoidance segment; these four track segments are interconnected to form a closed loop. Furthermore, when the roller is located in the scraping segment, feeding segment, adjustment segment, or avoidance segment, its corresponding brush teeth are located in the scraping area, feeding area, adjustment area, and avoidance area, respectively. The posture changes of the roller and its corresponding brush teeth in each segment of the track are as follows:

[0071] When the roller is pulled and moves in the scraping section, the corresponding brush teeth are located in the scraping area. Specifically, in the scraping area, the brush teeth gradually extend outward, approach the grid surface, and hook up the solid waste that has not been completely removed from the grid.

[0072] When the roller is pulled and moves in the feeding section, the corresponding brush teeth are located in the feeding area. Specifically, in the feeding area, the brush teeth rotate to the lower side of the brush roller assembly 240, thereby unloading the hooked solid waste by gravity.

[0073] When the roller is pulled and moves in the adjustment section, the corresponding brush teeth are located in the adjustment zone. Specifically, in the adjustment zone, the brush teeth gradually rotate from an outward-extending posture to converge in a direction tangential to the cylindrical surface of the brush roller.

[0074] When the roller is pulled and moves in the avoidance section, its corresponding brush teeth are located in the avoidance zone. Specifically, in the avoidance zone, the brush teeth are tangent to the cylindrical surface of the brush roller until they enter the scraping zone.

[0075] Based on the above requirements for cam trajectory and rack posture, specific mechanism parameters can be calculated according to actual working conditions and the design principles of cam mechanisms.

[0076] As one embodiment of this application, such as Figure 4 , 5 As shown, a design approach for a cam trajectory is proposed:

[0077] The angle between the crank mechanism and the projection of the brush teeth onto the brush rod axis is 90 degrees.

[0078] The relevant angle design can refer to the following parameter ranges: ∠MOS ranges from 100° to 135°; ∠SOB ranges from 90° to 135°; ∠BOA ranges from 30° to 50°; ∠AOM ranges from 90° to 130°; and ∠MOS + ∠SOB + ∠BOA + ∠AOM = 360°.

[0079] The relevant length parameter relationships can be referenced as follows: OC = OS = 4 / 3 * OR; OM = 2 / 3 * OR; OD = 2 / 3 * OR; ON = 3 / 5 * OR; OA = 4 / 7 * OR; OB = 3 / 2 * OR.

[0080] Regarding the relevant curves and arcs (the movement trajectory of the rollers corresponding to the brush teeth): Arc Corresponding avoidance segment; arc Corresponding scraping section; arc Corresponding feeding section; transition curve BA (to the arc) With arc (To achieve a smooth transition) Corresponding adjustment segment.

[0081] Based on the above parameters and the design principles of the cam mechanism, the actual parameters of the cam trajectory can be designed and calculated according to the required dimensions of the actual structure. The data above is for reference only, and its range and relationships can be adjusted within appropriate limits (e.g., Figure 5 , 6As shown, the proportions and relationships of the changing arc segments and curves can be adjusted appropriately (as long as the basic segmentation rules are not affected), but the adjustment range generally does not exceed 20%. The center of the circle corresponding to each arc segment of the cam trajectory can be appropriately designed based on the above parameters to obtain a more accurate motion trajectory.

[0082] In the above embodiments of this application, the purpose of setting the adjustment area and the avoidance area is to reduce the space occupied above the brush roller assembly by retracting the brush teeth, so as to reduce interference with the material falling above.

[0083] In a preferred embodiment of this application, such as Figure 2 , 6 As shown, the grid device further includes a wedge baffle 260, which is disposed on one side of the adjustment zone and the avoidance zone. When the brush teeth 244 enter the adjustment zone and the avoidance zone, the wedge baffle 260 guides the material falling from above and prevents the material from falling directly onto the brush roller assembly.

[0084] The wedge-shaped baffle 260 has a wedge-shaped cross-section, its length direction is parallel to the brush roller shaft 241, and both ends are fixed to the grid body 210.

[0085] In this embodiment, when the roller is in the avoidance section of its stroke, its brush teeth are tangent to the cylindrical surface of the brush roller, and the movement trajectory of all points on the brush teeth is very close to the cylindrical surface where the brush rod is located. This saves a lot of space relative to the outward extension of the brush teeth, thereby reducing interference with the upper material dropping area. The upper side of the wedge-shaped baffle 260 is also inclined downwards to facilitate the guiding of the scraped solid waste into the lower storage bin 250.

[0086] In one embodiment, the brush teeth 244 may be made of a rigid material, and the side of the wedge-shaped baffle 260 opposite to the brush roller assembly does not exceed the movement range of its brush teeth 244 to avoid interference with the movement of the brush teeth. In another embodiment, the portion of the brush teeth 244 near the brush rod 243 is made of a rigid material (such as metal), and its end is made of a soft material (such as rubber, silicone, etc.) or an elastic material (such as a metal spring / rod). In this case, the side of the wedge-shaped baffle 260 opposite to the brush roller assembly 240 does not exceed the movement range of the rigid portion of its brush teeth 244. This avoids movement interference and also allows for sufficient scraping of solid waste from the brush rod.

[0087] In one embodiment of this application, the brush teeth can be made of a rigid material. In one embodiment, on the side of the brush roller assembly opposite to the grid, the movement trajectory of the end of the brush tooth 244 does not exceed the surface of the grid, thus avoiding motion interference between the brush tooth and the grid. In another embodiment, position detection sensors for the brush teeth and the grid are provided. Based on the grid length, grid moving speed, and the rotational speed, rotation cycle, and structural parameters of the brush roller assembly, periodic or real-time monitoring can be performed, and the meshing relationship between the brush teeth and the grid can be calculated. This ensures that when each brush bar is facing the grid, its corresponding brush tooth can extend into the grid to scrape the material while avoiding the grid boundary, guaranteeing smooth linkage between the scraping actions of the two. In the third case, the part of the brush tooth 244 near the tooth bar is made of a rigid material (such as metal), and its end is made of a soft material (such as rubber, silicone, etc.) or an elastic material (such as a metal spring / rod). Then, on the side of the brush roller assembly opposite to the grid, the movement trajectory of the soft or elastic material part at the end of the brush tooth is set to be able to extend into the grid mesh. This can effectively cooperate with the rigid body of the brush tooth to scrape the material and also avoid rigid collision with the grid frame.

[0088] In one embodiment of this application, the brush teeth are rod-shaped, triangular, or conical, depending on the actual working conditions.

[0089] In one embodiment of this application, such as Figure 7 As shown, the brush rod support 242 is a spoke support, including a bushing 2421 rotatably connected to the brush roller shaft, and spokes 2422 uniformly fixed around the bushing 2421 and extending radially outward; the brush rod 243 is rotatably connected to the end of the spokes.

[0090] In another embodiment of this application, such as Figure 8 , 9 As shown, the brush rod support 242 has a disc-shaped structure. A bushing structure 2423, rotatably connected to the brush roller shaft, is provided in the center of the disc-shaped structure. A plurality of mounting holes 2424 are evenly distributed around the periphery of the bushing structure, allowing for the rotatable mounting of the brush rod. Furthermore, the edge of the disc-shaped structure has outwardly extending mud-blocking edges 2425. These mud-blocking edges can extend further to both sides of the support frame, preventing dirt from entering the mounting mechanisms on both sides.

[0091] The wastewater recycling equipment provided in this embodiment includes a bar screen with a scraping roller assembly. Compared to the traditional method of feeding materials solely by gravity, the brush roller assembly provides an additional scraping process during feeding, improving feeding efficiency and effectively removing solid waste adhering to the bar screen to prevent it from affecting the filtration effect. Furthermore, the brush roller assembly of this bar screen is equipped with a crank-cam mechanism to adjust the swing posture of the brush teeth, allowing the brush teeth to fully extend during scraping and retract during feeding to facilitate the removal of waste from the tooth bars.

[0092] In one embodiment of this application, such as Figure 10 As shown, a municipal solid waste incineration slag treatment system is also provided, comprising:

[0093] Slag pretreatment equipment 10 is used for screening, crushing, magnetic separation, and jigging of municipal solid waste incineration slag; and

[0094] The wastewater recycling equipment 20, as shown in the previous embodiment, is used to recycle the wastewater from the cleaning of municipal solid waste incineration slag generated by the slag pretreatment equipment 10.

[0095] In this embodiment, the slag pretreatment equipment includes a screening device, a crushing device, a magnetic separation device, a jigging device, etc. These devices sequentially screen, crush, magnetically separate, and jig the municipal solid waste incineration slag, and introduce the municipal solid waste incineration slag washing wastewater generated during the process into the wastewater recycling equipment for recyclable treatment.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater recycling device, characterized in that, include: The grab bucket sand removal device is used to remove sediment and sand from the wastewater from the washing of municipal solid waste incinerator slag to obtain the first filtered wastewater. A bar screen is used to filter the first filtered wastewater to obtain the second filtered wastewater. A water collection device is connected to the bar screen device to collect and store the second filtered wastewater; A sedimentation device, connected to the water collection device, is used to treat the second filtered wastewater by sedimentation to obtain recycled water and settled sludge; A sludge collection device, connected to the sedimentation device, is used to collect and store the settled sludge; as well as A recycled water collection device is connected to the sedimentation device to collect and store the recycled water for reuse in production. The grid device includes: Grille body; A rotary grid assembly is installed in the bar screen body, and the lower part of the rotary grid assembly is inclined in the water inlet channel; A first driving component that drives the rotation of the grid assembly; A brush roller assembly disposed on the inner top side of the grid device is used to scrape off solid waste adhering to the rotary grid assembly; and A storage bin for collecting the scraped solid waste; The brush roller assembly includes: The brush roller shaft is rotatably mounted on the upper part of the bar screen body; Two sets of brush rod supports are mounted on the brush roller shaft, and several rotatable brush rods are arranged between the two sets of brush rod supports. Each brush rod is fixed with multiple sets of brush teeth perpendicular to the brush rod for scraping the mesh. The brush rods are arranged parallel to the brush roller shaft and are evenly distributed on a cylindrical surface with the brush roller shaft as the axis and a set distance as the radius. The end of each brush rod is fixedly connected to a set of crank mechanisms, and the other end of the crank mechanisms is rotatably connected to a roller. The rotation axis of the roller is parallel to the axis of the brush rod. A cam slide rail mechanism is installed on the grille body, wherein the rollers are slidably mounted in the cam linear track of the cam slide rail mechanism; and The second driving component is used to drive the brush roller shaft to rotate; When the brush roller shaft rotates, the brush rod is driven to make a circular motion through the brush rod bracket. The roller slides in the cam slide rail mechanism under the traction of the brush rod through the crank mechanism. The walking state of the roller along the cam slide rail mechanism will be fed back to the corresponding brush rod through the crank mechanism, causing it to rotate. As a result, the brush teeth on the brush rod will produce a corresponding oscillating posture due to the rotation of the brush rod.

2. The wastewater recycling equipment according to claim 1, characterized in that, The track line of the cam slide rail mechanism is configured to include the following sequentially connected sections: scraping section, feeding section, adjustment section, and avoidance section; When the roller is pulled and moves in the scraping section, the corresponding brush teeth are located in the scraping area; when in the scraping area, the brush teeth gradually extend outward, approach the grid surface and hook up the solid waste that has not been completely removed from the grid. When the roller is pulled and moves in the feeding section, the corresponding brush teeth are located in the feeding area; when in the feeding area, the brush teeth rotate to the underside of the brush roller assembly, thereby unloading the hooked solid waste by gravity. When the roller is pulled and moves in the adjustment section, the corresponding brush teeth are located in the adjustment zone; when in the adjustment zone, the brush teeth gradually rotate from an outwardly extending posture to converge in a direction tangential to the cylindrical surface of the brush roller. When the roller is pulled and moves in the avoidance section, its corresponding brush teeth are located in the avoidance zone; in the avoidance zone, the brush teeth are tangent to the cylindrical surface of the brush roller until they enter the scraping zone.

3. The wastewater recycling equipment according to claim 2, characterized in that, The grid device further includes a wedge-shaped baffle, which is disposed on one side of the adjustment area and the avoidance area. When the brush teeth enter the adjustment area and the avoidance area, the wedge-shaped baffle guides the material falling from above and prevents the material from falling directly onto the brush roller assembly. The wedge-shaped baffle has a wedge-shaped cross-section, its length direction is parallel to the brush roller shaft, and both ends are fixed to the grid body.

4. The wastewater recycling equipment according to claim 1, characterized in that, The brush teeth are rod-shaped, triangular, or conical.

5. The wastewater recycling equipment according to claim 1, characterized in that, The brush rod support is a spoke frame structure, including a bushing rotatably connected to the brush roller shaft, and spokes evenly fixed around the bushing and extending radially outward; the brush rod is rotatably connected to the end of the spokes.

6. The wastewater recycling equipment according to claim 1, characterized in that, The brush rod support is a disc-shaped structure. A bushing structure that is rotatably connected to the brush roller shaft is provided in the middle of the disc-shaped structure. Several mounting holes are evenly distributed around the periphery of the bushing structure. The mounting holes are used to rotatably mount the brush rod.

7. The wastewater recycling equipment according to claim 6, characterized in that, The disc-shaped structure has outwardly extending mudguard edges.

8. A municipal solid waste incineration slag treatment system, characterized in that, include: Slag pretreatment equipment is used for screening, crushing, magnetic separation, and jigging of slag from municipal solid waste incineration. as well as The wastewater recycling equipment as described in claims 1 to 7 is used to recycle the wastewater from the washing of municipal solid waste incineration slag generated by the slag pretreatment equipment.

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