Channel coupling type superfine grid based on water passing capacity improvement and operation method thereof

Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a channel coupling type superfine grid based on water passing capacity improvement and an operation method thereof.The main body frame is connected with the bottom face of a fine grid channel through a first support, a water inlet baffle is further vertically arranged on the bottom face of the fine grid channel, and the water inlet baffle is buckled to the end, close to a water inlet, of a side plate; a cover plate of the fine grid channel is provided with a second support and a spiral squeezing groove; an equipment outer cover is buckled on a side plate and the spiral squeezing groove; a filtering grid plate is horizontally and fixedly arranged between the side plates, the two ends of the filtering grid plate are connected with the water inlet baffle and the slag guide plate respectively, and the slag guide plate is further connected with the spiral squeezing groove; a driving rotating shaft, a first driven rotating shaft and a second driven rotating shaft are arranged between the side plates; the driving chain wheel, the first driven chain wheel and the second driven chain wheel are connected through a transmission chain, and a slag scraping plate is arranged on the transmission chain. The problems of insufficient water passing capacity, separation grid slag penetration, high driving energy consumption and the like of a traditional fine / superfine grid can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment, and in particular relates to a channel-coupled ultrafine grid based on water flow capacity enhancement and an operation method thereof. Background Art

[0002] The screen is an important general pretreatment equipment in urban sewage treatment plants. Its main function is to remove inert impurities in sewage such as fine particles, hair, and entanglements. It is generally divided into coarse screens, fine screens, and ultra-fine screens according to the screen pitch. It plays an important role in ensuring the stable operation of subsequent biological treatment systems and deep treatment systems, especially fine / ultra-fine screens. At present, the main types of fine / ultra-fine screens widely used in urban sewage treatment plants include drum screens, internal inlet screens, step screens, rake screens, etc. However, a large number of actual engineering surveys have found that the above-mentioned mainstream fine / ultra-fine screen equipment generally has a series of practical problems in actual engineering applications, such as low grid utilization rate (generally 20%-40%), limited water flow capacity improvement, grid rotation deformation, partial grid residue penetration, rotating shaft fracture, large operation and maintenance workload, high drive energy consumption, and large backwash water volume.

[0003] Therefore, there is an urgent need to propose a channel-coupled ultrafine screen and operation method with high screen utilization, large water flow capacity, full screen residue interception, low equipment failure rate, simplified operation and maintenance, and easy engineering implementation, so as to solve the main problems existing in the actual application of existing fine / ultrafine screen equipment, such as low screen utilization, screen rotation deformation, partial screen residue penetration, high driving energy consumption and difficulty in on-site capacity expansion and efficiency improvement. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a channel-coupled ultrafine screen based on improved water flow capacity and its operation method. The present invention innovates the equipment structure type, operation mode and installation method. Compared with traditional ultrafine screens such as rotary drum type and internal inlet type, the present invention has the advantages of simple system structure, fixed grid plate, high grid plate utilization rate, large water flow capacity, low driving power, no need for backwashing, full interception of screen residue, and simplified operation and maintenance. It can solve the problems of insufficient water flow capacity of traditional fine / ultrafine screens in urban sewage treatment plants, high equipment failure rate, penetration of separation screen residue, and high driving energy consumption.

[0005] In a first aspect, an embodiment of the present invention provides a channel-coupled ultra-fine grid based on improved water flow capacity, comprising a main frame and an equipment cover, wherein the main frame is connected to the bottom surface of the fine grid channel through a first support, and a water inlet baffle is vertically arranged on the bottom surface of the fine grid channel, wherein the water inlet baffle is buckled to one end of a side plate close to a water inlet, and the side plate is fixed to the main frame, a second support is arranged on the cover plate of the fine grid channel, a spiral pressing groove is arranged on the second support, and the equipment cover is buckled to the side plate and the spiral pressing groove; A filter grid is fixedly arranged horizontally between the side plates on both sides, one end of the filter grid is connected to the water inlet baffle, and the other end is connected to one end of the slag guide plate, and the other end of the slag guide plate is connected to the spiral pressing groove; a driving shaft, a first driven shaft and a second driven shaft are arranged horizontally between the side plates on both sides, and the driving shaft is driven by a transmission drive motor; The ends of the driving shaft, the first driven shaft and the second driven shaft are respectively provided with symmetrical driving sprockets, the first driven sprocket and the second driven sprocket, and each set of driving sprockets, the first driven sprocket and the second driven sprocket are connected by a transmission chain; A scraper plate is arranged between the transmission chains, and both ends of the scraper plate are fixedly connected to the chain plates of the transmission chain. The bottom surface of the scraper plate is in contact with the upper surface of the filter grid plate.

[0006] Furthermore, the filter grid is a perforated plate structure with an opening diameter of 1-5 mm. The upper surface of the filter grid is 5-10 cm higher than the water level of the sewage in the fine grid channel, the width is 10-20 cm smaller than the width of the fine grid channel, and the length is 2-4 m.

[0007] Furthermore, the water inlet baffle comprises a main water inlet baffle and side water inlet baffles located on both sides thereof, and the water inlet is arranged at the upper part of the main water inlet baffle; The total width of the water inlet baffle is the same as the width of the fine grid channel, the width of the side water inlet baffle is the same as the horizontal distance between the side plate and the side wall of the fine grid channel, the height of the side water inlet baffle is the same as the depth of the fine grid channel, the top of the main water inlet baffle is 1-2 cm higher than the upper surface of the filter grid plate, and the side and bottom surfaces of the water inlet baffle are respectively fitted with the side walls and bottom surfaces of the fine grid channel by setting soft rubber.

[0008] Furthermore, the first driven sprocket and the second driven sprocket are arranged at the same height, and the bottoms of the first driven sprocket and the second driven sprocket are 15-20 cm higher than the upper surface of the filter grid plate, the driving sprocket is arranged above the first driven sprocket and the second driven sprocket, and the center point connecting line of the driving sprocket and the second driven sprocket is arranged parallel to the slag guide plate; The horizontal distance between the driving sprocket, the first driven sprocket and the second driven sprocket and the side plate is 10-15 cm; The transmission chain for horizontal transmission between the first driven sprocket and the second driven sprocket is 15-20 cm higher than the upper surface of the filter grid plate.

[0009] Furthermore, the transmission chain is symmetrically arranged between the side plates, and performs a rotary motion driven by the transmission drive motor and the driving sprocket; The scraper plates are arranged at intervals along the length direction of the transmission chain, with an interval of 0.5-0.75m.

[0010] Furthermore, the slag guide plate is a non-perforated plate structure, the width of which is the same as the horizontal distance between the side plates on both sides, and the setting angle is 30-60°.

[0011] In a second aspect, an embodiment of the present invention provides an operation method of a channel-coupled ultra-fine grid based on water flow capacity improvement, which is performed on the channel-coupled ultra-fine grid described in the first aspect and includes the following operation steps: Step S1, the sewage entering the fine grid channel continuously flows horizontally from the water inlet to the horizontally fixed filter grid plate under the combined action of the water inlet baffle and the side plates on both sides and is distributed on the upper surface thereof for sewage filtration enhancement pretreatment; Step S2, inert impurities including fine particles and hair in the sewage are continuously separated and retained on the upper surface of the filter grid plate, and the sewage after the inert impurities are separated continuously passes through the filter grid plate at a high grid flow rate of 1.0-1.5 m / s and in a vertical direction instead of the horizontal direction of the traditional fine / ultra-fine grid, and directly enters the fine grid channel; Step S3, the transmission chain is driven by a variable frequency and adjustable speed transmission drive motor to make a counterclockwise continuous uniform rotation motion above the filter grid plate, and at the same time, a plurality of hard scraper plates arranged on the transmission chain are coupled to continuously scrape the inert impurities separated and retained on the upper surface of the filter grid plate along the upper surface of the filter grid plate and the slag guide plate into a spiral pressing groove arranged outside the fine grid channel, and the grid residue is discharged from the slag outlet after being squeezed by the intermittently running spiral pressing groove driven by the squeezing motor.

[0012] Furthermore, in step S3, the rotation speed of the transmission drive motor is 10-50 rpm.

[0013] The technical solution provided by the embodiment of the present invention has the following beneficial effects: 1. The utilization rate of the grid plates of traditional ultra-fine grids such as rotary drum type and internal flow type is low, and the intermittent rotational movement of the core component stainless steel filter grid plate will cause grid plate deformation and jamming, high driving energy consumption and other problems. The present invention adopts innovative designs such as horizontal fixed setting of the core component filter grid plate, vertical filtering flow direction and change of equipment installation method, and the grid plate utilization rate (up to 100%), filtration area, grid flow rate and water passing capacity are significantly improved, which can effectively solve the practical problems of low grid plate utilization rate, limited water passing capacity improvement, grid plate rotation deformation, and large rotation driving power of traditional ultra-fine grids.

[0014] 2. Conventional ultra-fine screens generally achieve the removal of fine screen residues separated and retained on the screen surface by frequently opening a high-pressure backwashing water system. The present invention utilizes a variable frequency adjustable speed motor with a small installed power to drive a transmission chain and a plurality of hard scraper plates to continuously rotate counterclockwise to achieve mechanical scraping of retained screen residues, which has the advantages of saving water, reducing flushing power consumption, and low-carbon operation.

[0015] 3. By innovating the equipment structure, operation mode and installation method, the present invention has the technical advantages of simple system structure, fixed grid plate without rotation, high grid plate utilization rate, large filtration area, large flow rate through the grid, large water flow capacity, low driving power, no need for backwashing, full interception of grid residue, no water level difference before and after the grid, in-situ increase in volume and efficiency, easy project implementation, and simplified operation and maintenance, compared with traditional fine / ultra-fine grids such as rotary drum type and internal flow type.

[0016] 4. The present invention is highly targeted, practical and operable, and can be used for in-situ improvement and efficiency-enhancing renovation projects and new expansion projects of urban sewage treatment plants and industrial wastewater treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the channel-coupled ultra-fine grid with improved water flow capacity according to the present invention.

[0018] Figure 2 It is a top view of the channel-coupled ultrafine grid based on the improved water flow capacity of the present invention.

[0019] Figure 3 It is a left view of a water inlet baffle of a channel-coupled ultra-fine grid with improved water flow capacity according to the present invention.

[0020] Explanation of the reference numerals: 1-main frame; 2-water inlet; 3-water inlet baffle; 4-filter grid plate; 5-slag guide plate; 6-transmission chain; 7-driving sprocket; 8-first driven sprocket; 9-second driven sprocket; 10-driving shaft; 11-first driven shaft; 12-second driven shaft; 13-slag scraper; 14-side plate; 15-spiral pressing groove; 16-pressing motor; 17-slag outlet; 18-transmission drive motor; 19-first support; 20-second support; 21-equipment cover; 22-bottom surface of fine grid channel; 23-cover plate of fine grid channel; 24-side wall of fine grid channel; 25-water level line; 3-1-main water inlet baffle; 3-2-side water inlet baffle. DETAILED DESCRIPTION

[0021] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Example 1 like Figure 1 and 2 As shown, a channel-coupled ultrafine grid based on water flow capacity improvement includes a main frame 1, a water inlet 2, a water inlet baffle 3, a filter grid plate 4, a slag guide plate 5, a transmission chain 6, a driving sprocket 7, a first driven sprocket 8, a second driven sprocket 9, a driving shaft 10, a first driven shaft 11, a second driven shaft 12, a slag scraper 13, a side plate 14, a spiral pressing groove 15, a pressing motor 16, a slag outlet 17, a transmission drive motor 18, a first support 19, a second support 20 and an equipment cover 21; The main frame 1 is connected to the bottom surface 22 of the fine grid channel through the first support 19. A water inlet baffle 3 is vertically arranged on the bottom surface 22 of the fine grid channel. The water inlet baffle 3 is buckled to one end of the side plate 14 close to the water inlet 2. The side plate 14 is fixed to the main frame 1. A second support 20 is arranged on the cover plate 23 of the fine grid channel. A spiral pressing groove 15 is arranged on the second support 20. The equipment cover 21 is buckled to the side plate 14 and the spiral pressing groove 15. A filter grid plate 4 is fixedly arranged horizontally between the side plates 14 on both sides, one end of the filter grid plate 4 is connected to the water inlet baffle 3, and the other end is connected to one end of the slag guide plate 5, and the other end of the slag guide plate 5 is connected to the spiral pressing groove 15; a driving shaft 10, a first driven shaft 11 and a second driven shaft 12 are arranged horizontally between the side plates 14 on both sides, and the driving shaft 10 is driven by a transmission drive motor 18; Two sets of symmetrical driving sprockets 7, first driven sprockets 8 and second driven sprockets 9 are respectively disposed at the ends of the driving rotating shaft 10, the first driven rotating shaft 11 and the second driven rotating shaft 12, and each set of driving sprockets 7, first driven sprockets 8 and second driven sprockets 9 are connected by a transmission chain 6; A scraper plate 13 is provided between the transmission chains 6 , and both ends of the scraper plate 13 are fixedly connected to the chain plates of the two transmission chains 6 . The bottom surface of the scraper plate 13 is in contact with the upper surface of the filter grid plate 4 .

[0024] The height of the side plate 14 is 40-50 cm, and the bottom of the side plate 14 does not contact the bottom surface 22 of the fine grid channel.

[0025] The filter grid plate 4 is a stainless steel perforated plate structure with an opening diameter of 1-5 mm. The upper surface of the filter grid plate 4 is 5-10 cm higher than the water level line 25 of the sewage in the fine grid channel, the width is 10-20 cm smaller than the width of the fine grid channel, and the length is 2-4 m.

[0026] like Figure 3 As shown, the water inlet baffle 3 includes a main water inlet baffle 3-1 and side water inlet baffles 3-2 located on both sides thereof, and the water inlet 2 is arranged on the upper part of the main water inlet baffle 3-1; The total width of the water inlet baffle 3 is the same as the width of the fine grid channel, the horizontal distance between the side plate 14 and the side wall 24 of the fine grid channel is the same as the width of the side water inlet baffle 3-2, the height of the side water inlet baffles 3-2 on both sides is the same as the depth of the fine grid channel, the top of the main water inlet baffle 3-1 is 1-2 cm higher than the upper surface of the filter grid plate 4, and the side and bottom surfaces of the water inlet baffle 3 are fully fitted with the side walls 24 and the bottom surface 22 of the fine grid channel respectively by arranging soft rubber.

[0027] The first driven sprocket 8 and the second driven sprocket 9 are arranged at the same height, and the bottoms of the first driven sprocket 8 and the second driven sprocket 9 are 15-20 cm higher than the upper surface of the filter grid plate 4. The driving sprocket 7 is arranged above the first driven sprocket 8 and the second driven sprocket 9, and the center point connecting line of the driving sprocket 7 and the second driven sprocket 9 is arranged parallel to the slag guide plate 5. The horizontal distance between the driving sprocket 7, the first driven sprocket 8 and the second driven sprocket 9 and the side plate 14 is 10-15 cm; The drive chain 6 that drives horizontally between the first driven sprocket 8 and the second driven sprocket 9 is 15-20 cm higher than the upper surface of the filter grid plate 4 .

[0028] The transmission chain 6 is symmetrically arranged between the side plates 14 on both sides, and performs a rotary motion driven by the transmission drive motor 18 and the driving sprocket 7; The scraper plates 13 are arranged at intervals along the length direction of the transmission chain 6, with the interval being 0.5-0.75 m.

[0029] The slag guide plate 5 is a stainless steel non-perforated plate structure, and its width is the same as the horizontal distance between the side plates 14 on both sides, and the setting angle is 30-60°.

[0030] Example 2 A method for operating a channel-coupled ultrafine grid based on improving water flow capacity comprises the following steps: Step S1, the sewage entering the fine grid channel continuously flows horizontally from the water inlet 2 to the filter grid plate 4 with a square stainless steel perforated plate structure with a pore size of 1 mm, under the combined action of the water inlet baffle 3 and the side plates 14 on both sides, and is distributed on the upper surface thereof for sewage filtration enhancement pretreatment; Step S2, inert impurities including fine particles and hair in the sewage are continuously separated and retained on the upper surface of the filter grid plate 4, and the sewage after the inert impurities are separated continuously passes through the filter grid plate 4 at a high grid flow rate of 1.0 m / s and in a vertical direction rather than a horizontal direction of a traditional fine / ultra-fine grid, and directly enters a fine grid channel whose water level is 5 cm lower than the upper surface of the filter grid plate 4; Step S3, the transmission chain 6 is driven by a variable frequency and adjustable speed transmission drive motor 18 with a rotation speed of 10 rpm to make a counterclockwise continuous uniform rotation motion above the filter grid plate 4, wherein the horizontal transmission chain section between the first driven sprocket 8 and the second driven sprocket 9 is 15 cm higher than the upper surface of the horizontally fixed stainless steel filter grid plate 4, and at the same time, a plurality of hard scraper plates 13 coupled to the transmission chain 6 are used to continuously and uniformly scrape the inert impurities separated and retained on the upper surface of the filter grid plate 4 along the upper surface of the filter grid plate 4 and the square stainless steel slag guide plate 5 with an angle of 30° into the spiral pressing groove 15 arranged outside the fine grid channel, and the screen residue is discharged from the slag outlet 17 after being squeezed by the intermittently running spiral pressing groove 15 driven by the squeezing motor 16.

[0031] Example 3 A method for operating a channel-coupled ultrafine grid based on improving water flow capacity comprises the following steps: Step S1, the sewage entering the fine grid channel continuously flows horizontally from the water inlet 2 to the horizontally fixed square stainless steel perforated plate structure with a pore size of 5 mm under the combined action of the water inlet baffle 3 and the side plates 14 on both sides, and is distributed on the upper surface thereof for sewage filtration and enhanced pretreatment; Step S2, inert impurities including fine particles and hair in the sewage are continuously separated and retained on the upper surface of the filter grid plate 4, and the sewage after the inert impurities are separated continuously passes through the filter grid plate 4 at a high grid flow rate of 1.5 m / s and in a vertical direction rather than a horizontal direction of the traditional fine / ultra-fine grid, and directly enters the fine grid channel whose water level is 10 cm lower than the upper surface of the filter grid plate 4; Step S3, the transmission chain 6 is driven by a variable frequency and adjustable speed transmission drive motor 18 with a rotation speed of 50 rpm to make a continuous uniform rotation motion in a counterclockwise direction above the filter grid plate 4. The specific rotation speed needs to be dynamically adjusted in combination with the actual slag content in the sewage. The horizontal transmission chain section between the first driven sprocket 8 and the second driven sprocket 9 is 20 cm higher than the upper surface of the filter grid plate 4. At the same time, a plurality of hard scraper plates 13 coupled to the transmission chain 6 are used to continuously and uniformly scrape the inert impurities separated and retained on the upper surface of the filter grid plate 4 along the upper surface of the filter grid plate 4 and the square stainless steel slag guide plate 5 with an angle of 60° into the spiral pressing groove 15 arranged outside the fine grid channel. After being squeezed by the intermittently running spiral pressing groove 15 driven by the squeezing motor 16, the slag is discharged from the slag outlet 17.

[0032] Example 4 A method for operating a channel-coupled ultrafine grid based on improving water flow capacity comprises the following steps: Step S1, the sewage entering the fine grid channel continuously flows horizontally from the water inlet 2 to the horizontally fixed square stainless steel perforated plate structure 4 with a pore size of 2 mm under the combined action of the water inlet baffle 3 and the side plates 14 on both sides, and is distributed on the upper surface thereof for sewage filtration and enhanced pretreatment; Step S2, inert impurities including fine particles and hair in the sewage are continuously separated and retained on the upper surface of the filter grid plate 4, and the sewage after the inert impurities are separated continuously passes through the filter grid plate 4 at a high grid flow rate of 1.2 m / s and in a vertical direction rather than a horizontal direction of a conventional fine / ultra-fine grid, and directly enters a fine grid channel whose water level is 7 cm lower than the upper surface of the filter grid plate 4; Step S3, the transmission chain 6 is driven by a variable frequency and adjustable speed transmission drive motor 18 with a rotation speed of 30 rpm to make a continuous uniform rotation motion in a counterclockwise direction above the filter grid plate 4, wherein the horizontal transmission chain section between the first driven sprocket 8 and the second driven sprocket 9 is 18 cm higher than the upper surface of the filter grid plate 4, and at the same time, a plurality of hard scraper plates 13 coupled to the transmission chain 6 are used to continuously and uniformly scrape the inert impurities separated and retained on the upper surface of the filter grid plate 4 along the upper surface of the horizontally fixed filter grid plate 4 and the square stainless steel slag guide plate 5 with an angle of 45° into the spiral pressing groove 15 arranged outside the fine grid channel, and the screen residue is discharged from the slag outlet 17 after being squeezed by the intermittently running spiral pressing groove 15 driven by the squeezing motor 16.

[0033] The comparison of water treatment effects of the traditional internal inlet ultrafine grid and the ultrafine grid of the present application is shown in Table 1.

[0034] Table 1 , It can be seen from Table 1 that under the conditions of the same aperture and effective grid area, the ultrafine grid in the embodiment of the present invention has a grid utilization rate increased by 150%, a water flow capacity increased by 65.4%, and a screen residue interception efficiency increased by 15.3% compared with the traditional internal inlet ultrafine grid, which can effectively solve the practical problems of low grid utilization, insufficient water flow capacity, and low screen residue interception efficiency of the traditional ultrafine grid. Finally, it should be explained that the above specific implementation methods are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. Channel-coupled ultra-fine grid based on improved water flow capacity, characterized in that: The device comprises a main frame (1) and an equipment cover (21), wherein the main frame (1) is connected to the bottom surface (22) of the fine grid channel via a first support (19), a water inlet baffle (3) is vertically arranged on the bottom surface (22) of the fine grid channel, the water inlet baffle (3) is buckled to one end of the side plate (14) close to the water inlet (2), the side plate (14) is fixedly connected to the main frame (1), a second support (20) is arranged on the cover plate (23) of the fine grid channel, a spiral pressing groove (15) is arranged on the second support (20), and the equipment cover (21) is buckled to the side plate (14) and the spiral pressing groove (15); A filter grid plate (4) is fixedly arranged horizontally between the side plates (14) on both sides, one end of the filter grid plate (4) is connected to the water inlet baffle (3), and the other end is connected to one end of the slag guide plate (5), and the other end of the slag guide plate (5) is connected to the spiral pressing groove (15); a driving shaft (10), a first driven shaft (11) and a second driven shaft (12) are arranged horizontally between the side plates (14) on both sides, and the driving shaft (10) is driven by a transmission drive motor (18); The ends of the driving rotating shaft (10), the first driven rotating shaft (11) and the second driven rotating shaft (12) are respectively provided with symmetrical driving sprockets (7), first driven sprockets (8) and second driven sprockets (9); each set of driving sprockets (7), first driven sprockets (8) and second driven sprockets (9) are connected via a transmission chain (6); A scraper plate (13) is provided between the transmission chains (6), the two ends of the scraper plate (13) are fixedly connected to the chain plates of the transmission chain (6), and the bottom surface of the scraper plate (13) is in contact with the upper surface of the filter grid plate (4).

2. The channel-coupled ultra-fine grid based on water flow capacity enhancement according to claim 1, characterized in that: The filter grid plate (4) is a perforated plate structure with an opening diameter of 1-5 mm. The upper surface of the filter grid plate (4) is 5-10 cm higher than the sewage water level (25) in the fine grid channel, the width is 10-20 cm smaller than the width of the fine grid channel, and the length is 2-4 m.

3. The channel-coupled ultra-fine grid based on water flow capacity enhancement according to claim 1, characterized in that: The water inlet baffle (3) comprises a main water inlet baffle (3-1) and side water inlet baffles (3-2) located on both sides thereof, and the water inlet (2) is arranged on the upper part of the main water inlet baffle (3-1); The total width of the water inlet baffle (3) is the same as the width of the fine grid channel, the width of the side water inlet baffle (3-2) is the same as the horizontal distance between the side plate (14) and the side wall (24) of the fine grid channel, the height of the side water inlet baffle (3-2) is the same as the depth of the fine grid channel, the top of the main water inlet baffle (3-1) is 1-2 cm higher than the upper surface of the filter grid plate (4), and the side surface and bottom surface of the water inlet baffle (3) are respectively fitted with the side wall (24) and bottom surface (22) of the fine grid channel by arranging a soft rubber.

4. The channel-coupled ultra-fine grid based on water flow capacity enhancement according to claim 1, characterized in that: The first driven sprocket (8) and the second driven sprocket (9) are arranged at the same height, and the bottoms of the first driven sprocket (8) and the second driven sprocket (9) are 15-20 cm higher than the upper surface of the filter grid plate (4); the driving sprocket (7) is arranged above the first driven sprocket (8) and the second driven sprocket (9); and the center point line of the driving sprocket (7) and the second driven sprocket (9) is arranged parallel to the slag guide plate (5); The horizontal distance between the driving sprocket (7), the first driven sprocket (8) and the second driven sprocket (9) and the side plate (14) is 10-15 cm; The drive chain (6) for horizontal transmission between the first driven sprocket (8) and the second driven sprocket (9) is 15-20 cm higher than the upper surface of the filter grid plate (4).

5. The channel-coupled ultra-fine grid based on water flow capacity enhancement according to claim 1, characterized in that: The transmission chain (6) is symmetrically arranged between the side plates (14), and performs a rotary motion driven by the transmission drive motor (18) and the driving sprocket (7); The scraper plates (13) are arranged at intervals along the length direction of the transmission chain (6), with the interval being 0.5-0.75 m.

6. The channel-coupled ultrafine grid based on water flow capacity enhancement according to claim 1, characterized in that: The slag guide plate (5) is a non-perforated plate structure, the width of which is the same as the horizontal distance between the side plates (14) on both sides, and the setting angle is 30-60°.

7. A method for operating a channel-coupled ultrafine grid based on improving water flow capacity, characterized in that: The method is carried out on the channel-coupled ultrafine grid according to any one of claims 1 to 6, comprising the following operating steps: Step S1, the sewage entering the fine grid channel continuously flows horizontally from the water inlet (2) to the horizontally fixed filter grid plate (4) under the combined action of the water inlet baffle plate (3) and the side plates (14) on both sides, and is distributed on the upper surface thereof for sewage filtration enhancement pretreatment; Step S2, inert impurities including fine particles and hair in the sewage are continuously separated and retained on the upper surface of the filter grid plate (4), and the sewage after the inert impurities are separated continuously passes through the filter grid plate (4) at a high grid flow rate of 1.0-1.5 m / s and in a vertical direction rather than a horizontal direction of a conventional fine / ultra-fine grid, and directly enters the fine grid channel; Step S3: The transmission chain (6) is driven by a variable frequency and adjustable speed transmission drive motor (18) to continuously rotate at a uniform speed in a counterclockwise direction above the filter grid plate (4). At the same time, a plurality of hard scraper plates (13) coupled to the transmission chain (6) are used to continuously scrape the inert impurities separated and retained on the upper surface of the filter grid plate (4) along the upper surfaces of the filter grid plate (4) and the slag guide plate (5) into a spiral pressing groove (15) arranged outside the fine grid channel. After being squeezed by the intermittently operated spiral pressing groove (15) driven by the squeezing motor (16), the slag is discharged from the slag outlet (17).

8. The method for operating the channel-coupled ultrafine grid based on water flow capacity enhancement according to claim 7, characterized in that: In step S3, the rotation speed of the transmission drive motor (18) is 10-50 rpm.

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