Power plant sewage grille intercepting equipment

Abstract

The utility model provides a power plant sewage grille intercepting equipment relates to sewage grille field, including the grating, the grating head-to-tail connection forms the belt structure of circulating movement, there are multiple groups of rolling roller in the grating, the rolling roller is connected in the support frame surface, one group of rolling roller is connected with motor, the grating surface is installed with the unloading assembly, the unloading assembly includes the fixed bin of installation in the support frame surface, the cleaning block in the fixed bin and the electric push rod connected between the cleaning block. Rolling roller engagement transmission and rack linkage, ensure that the grating moves stably, and the inclined support saves the labor by gravity, reduces the energy consumption. In the unloading assembly, the cleaning block convexity is matched with the brush, thoroughly removes the clearance sundries, and also does not scratch the grating, and the electric push rod is adjusted frequency according to L / V, realizes the dead angle cleaning, avoids the influence of the blockage and overflows. The sewage collection tank is accurately positioned, and the sundries are collected to prevent secondary pollution, the whole equipment is continuously operated, and the artificial maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of sewage screens, and in particular to a sewage screen interception device for power plants. Background Technology

[0002] During the power generation process, power plants generate wastewater containing solid pollutants such as coal dust, metal fragments, and fibrous impurities. If this wastewater is discharged directly without pretreatment or enters the subsequent treatment system, it can easily cause pipe blockage, equipment wear, and affect the efficiency of wastewater treatment and the normal operation of the power plant. Therefore, the bar screen equipment in the wastewater pretreatment stage is a key link, and its performance is directly related to the stability and economy of the power plant's wastewater treatment system.

[0003] Currently, commonly used bar screen interception equipment in power plants mainly includes rotary bar screens and three-cable wire rope bar screens. These devices mostly use metal bars to form an interception structure, relying on motors to drive components such as rake teeth or rake buckets to clean up the wastewater and achieve solid-liquid separation, thus meeting the basic needs of power plant wastewater interception to a certain extent.

[0004] However, existing technologies have significant shortcomings: metal grid bars have poor corrosion resistance and are prone to rusting when in contact with acidic or alkaline wastewater from power plants for extended periods, thus shortening equipment lifespan; the cleaning components and grid bars are not well-matched, which can easily lead to debris getting stuck or incomplete cleaning, resulting in grid gap blockage and reduced flow capacity; moreover, most equipment requires regular manual maintenance and cleaning, with limited automation, which increases the operating costs of power plants and makes it difficult to meet the high-efficiency, low-consumption wastewater treatment needs of modern power plants. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a power plant wastewater bar screen interception device, which more accurately solves the issues of single function, lack of comprehensiveness and safety, and inability to meet diverse needs.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes a wastewater bar interception device for power plants, including a bar screen. The bar screens are connected end to end to form a recirculating and movable strip structure. There are multiple sets of rolling rollers inside the bar screen. The rolling rollers are connected to the surface of the support frame. One set of rolling rollers is connected to a motor. A wastewater discharge assembly is installed on the surface of the bar screen.

[0008] The waste removal assembly includes a fixed chamber mounted on the surface of a support frame, cleaning blocks inside the fixed chamber, and electric push rods connected between the cleaning blocks.

[0009] Furthermore, the grid plate is made of rubber grid strips, and multiple sets of grid strips are parallel and spaced apart, with a dirt-collecting plate fixed between adjacent grid strips.

[0010] Furthermore, the surface of the rolling roller is specially provided with a groove that matches the edge of the grid plate. The rolling roller meshes with the grid plate, and the rolling rollers in each group are connected by a rack and pinion. One group of rolling rollers is directly connected to the output end of the drive motor.

[0011] Furthermore, the support frame stably installs multiple sets of rolling rollers inside the sewage tank and on the outside of the tank wall, and supports the grid plate in an inclined state.

[0012] Furthermore, the fixed chamber is fixed to the surface of the support frame between the two sets of rolling rollers at the tail end.

[0013] Furthermore, multiple sets of electric push rods are evenly installed inside the fixed chamber, with the output end of the electric push rods facing the grid plate.

[0014] Furthermore, the cleaning block is connected to the output end of the electric push rod. The surface of the cleaning block is provided with multiple protrusions. The volume of the protrusions is smaller than the size of the gap in the grid plate, while the height of the protrusions is greater than the depth of the gap in the grid plate. The outside of the protrusions is also wrapped with a soft brush.

[0015] Furthermore, a sludge collection tank is provided directly below the sludge unloading assembly. The sludge collection tank is fixedly installed on the outside of the sewage tank wall by a sludge collection frame, and the opening of the sludge collection tank is located directly below the sludge unloading assembly.

[0016] The beneficial effects of this utility model are:

[0017] 1. The rubber-material grid bars of this utility model combine corrosion resistance and structural toughness, making them suitable for the complex water quality of power plant wastewater and effectively preventing grid damage caused by solid debris clogging. The vertical waste-bearing plate and grid bars work together to form a closed interception surface, significantly reducing the leakage rate of debris from the grid gaps and improving solid-liquid separation efficiency. The rolling rollers are driven by groove meshing, and in conjunction with the rack and pinion mechanism, multiple rollers achieve synchronous linkage, ensuring the stability of the grid operation. The inclined support design uses gravitational potential energy to assist in the conveying of debris, reducing energy consumption of the drive system. In the waste discharge assembly, the raised structure of the cleaning block precisely matches the grid gap size, and the outer brush achieves flexible cleaning, ensuring thorough removal of debris from the gaps while avoiding scratches on the grid bars. The electric push rod dynamically adjusts the extension and retraction frequency according to the "cleaning block length / grid plate linear speed" to achieve cleaning of the entire grid surface without dead angles, preventing grid gap blockage and subsequent decrease in flow capacity.

[0018] 2. The sludge collection tank of this utility model is precisely positioned below the sludge unloading area by a sludge collection frame, realizing centralized collection of debris and avoiding the risk of secondary pollution; the equipment operates in an automated cycle, significantly reducing manual operation and maintenance costs and improving the operational stability and economy of the power plant wastewater treatment system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a power plant wastewater bar screen interception device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the grid structure of a power plant wastewater bar interception device according to the present invention;

[0021] Figure 3 This is an exploded structural diagram of the wastewater unloading component of a power plant wastewater bar interception device according to the present invention;

[0022] Figure 4 This is a schematic diagram of point A of a power plant wastewater bar screen interception device according to the present invention.

[0023] The attached figures are labeled as follows:

[0024] 1. Grille; 2. Sludge receiving plate; 3. Motor; 4. Rolling roller; 5. Support frame; 6. Sludge discharge assembly; 601. Fixed compartment; 602. Squeezing block; 603. Electric push rod; 7. Sludge collection tank; 8. Sludge collection rack. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this utility model, a detailed description is provided below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

[0030] like Figures 1-4 As shown, the present invention provides a wastewater bar screen interception device for power plants. The device includes a screen plate, which is connected end to end to form a recyclable and movable strip structure. The screen plate contains multiple sets of rolling rollers 4, which are connected to the surface of a support frame 5. One set of rolling rollers 4 is connected to a motor 3. A wastewater discharge assembly 6 is installed on the surface of the screen plate.

[0031] The waste removal assembly 6 includes a fixed chamber 601 mounted on the surface of the support frame 5, a cleaning block 602 inside the fixed chamber 601, and an electric push rod 603 connected between the cleaning blocks 602.

[0032] The grid plate is designed with rubber grid bars 1 and vertical waste-receiving plates 2. Multiple sets of grid bars 1 are arranged in parallel and spaced intervals, and waste-receiving plates 2 are fixed between adjacent grid bars 1. Finally, they are connected end to end to form a recyclable and movable strip structure. The choice of rubber material not only has good corrosion resistance and can adapt to the acid and alkali components that may exist in the power plant wastewater, but also has a certain degree of toughness, which can prevent the grid bars 1 from breaking when solid debris gets stuck. The vertical arrangement of the waste-receiving plates 2 can accurately receive solid objects blocked by the grid bars 1, prevent them from leaking through the gaps in the grid bars 1, and ensure that no one is missed.

[0033] The surface of the rolling roller 4 is specially grooved to match the edge of the grid plate, achieving stable transmission through meshing with the grid plate. The various sets of rolling rollers 4 are connected by racks and pinions to ensure synchronous operation of all rollers 4, preventing grid plate misalignment due to uneven transmission. Simultaneously, one set of rolling rollers 4 is directly connected to the output of the drive motor 3, providing continuous power to the entire conveying system. The bracket serves a dual purpose of fixing and supporting, not only stably installing multiple sets of rolling rollers 4 inside the sewage tank and on the outside of the tank wall, but also supporting the grid plate in an inclined state, creating favorable conditions for subsequent debris conveying.

[0034] During operation, the inclined main body of the grid plate is first placed at the power plant's wastewater outlet to ensure that wastewater can flow naturally over the grid plate surface. As the wastewater flows continuously, the liquid portion and small impurities with a particle size smaller than the gaps between the grid bars 1 can smoothly pass through the gaps between the grid bars 1 and enter the subsequent wastewater treatment stage, achieving preliminary filtration. Larger solid debris, such as coal chunks from the coal conveying system, metal shavings left over from maintenance, and plastic packaging bags, will be effectively blocked by the grid bars 1. Some of these debris will fall directly onto the surface of the dirt-receiving plate 2 between the grid bars 1 due to their own gravity, while others may get stuck in the gaps between the grid bars 1. At this time, the drive motor 3 is started, and the motor 3 drives the connected rolling roller 4 to rotate. Through rack and pinion transmission, all the rolling rollers 4 move synchronously, thereby driving the grid plate meshing with them to move in a bottom-up circular motion along the inclined support. During this process, the solid debris carried on the surface of the waste plate 2 is transported upward along with the grid plate. The inclined grid plate structure can use gravity to assist the movement of the debris, which is more labor-saving than horizontal transport. At the same time, it also prevents sewage from stagnating on the surface of the grid plate, effectively improving the interception and transport efficiency and reducing the residence time of sewage in the equipment.

[0035] To thoroughly remove debris stuck in the gaps of the grid bars 1, the waste removal assembly 6 is used. This part mainly includes a fixed chamber 601, multiple sets of electric push rods 603, and a cleaning block 602. The fixed chamber 601 serves as the mounting base for the waste removal assembly 6 and is firmly fixed to the surface of the support frame 5 between the two sets of rolling rollers 4 at the tail end. Its position is precisely calibrated to ensure that the internally installed components can be precisely aligned with the moving grid. Inside the fixed chamber 601, multiple sets of electric push rods 603 are evenly installed according to the width of the grid. The output end of the electric push rod faces the grid, and the extension and retraction frequency can be flexibly adjusted. The cleaning block 602 is connected to the output end of the electric push rod 603. Its surface has multiple protrusions, the volume of which is strictly controlled to be smaller than the gaps in the grid plates to ensure it can penetrate deep into the gaps of the grid bars 1. The height of the protrusions is greater than the depth of the gaps to ensure thorough cleaning of debris within the gaps. Simultaneously, a soft brush is wrapped around the outside of the protrusions, enhancing the cleaning effect and preventing scratches from direct contact between the hard protrusions and the rubber grid bars 1, thus extending the grid plate's service life. The sludge collection tank 7, as the final collection container for debris, is fixedly installed on the outside of the sewage tank wall via a sludge collection frame 8. The length and height of the sludge collection frame 8 are calculated so that the opening of the sludge collection tank 7 is precisely located below the sludge discharge assembly 6, ensuring that debris falls accurately into it.

[0036] When the screen moves to the area of ​​the tail end of the rolling roller 4, which is higher than the wall of the sewage tank, driven by the rolling roller 4, the sludge unloading component 6 starts simultaneously. The electric push rod 603 extends and retracts cyclically according to preset parameters. Its extension and retraction frequency is strictly set according to the formula "length L of cleaning block 602 divided by the speed V of screen movement", that is, the extension time interval is L / V seconds. This design ensures that the cleaning block 602 can fully cover all areas of the screen during the movement of the screen, achieving cleaning without dead corners and effectively avoiding the problems of reduced flow area and increased sewage level caused by blockage of the gaps in the screen bars 1. Under the push of the electric push rod 603, the protrusions on the surface of the cleaning block 602 penetrate into the gaps in the screen bars 1, and the brush thoroughly sweeps out the debris stuck in them; at the same time, the solid debris on the sludge receiving plate 2 reaches the position of the tail end rolling roller 4 with the screen. Because the screen turns at this point (from upward conveying to downward return), the debris is removed from the surface of the sludge receiving plate 2 under the action of gravity and falls down together with the debris swept out by the cleaning block 602. The sludge collection tank 7, located directly below the sludge unloading component 6, effectively collects all the falling debris, preventing it from falling back into the wastewater tank and causing pollution. After unloading, the screen plate continues its downward journey with the rolling roller 4, returning to its initial position in the wastewater tank to re-enter the next round of interception and conveying cycle. The entire process requires no manual intervention, enabling continuous operation of the equipment, significantly reducing manual maintenance costs, and also improving the automation level of power plant wastewater treatment.

[0037] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0038] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A wastewater screening device for power plants, comprising a screen plate, characterized in that, The grid plates are connected end to end to form a cyclically movable strip structure. There are multiple sets of rolling rollers (4) inside the grid plates. The rolling rollers (4) are connected to the surface of the support frame (5). One set of the rolling rollers (4) is connected to the motor (3). The surface of the grid plates is equipped with a waste discharge assembly (6). The unloading assembly (6) includes a fixed chamber (601) mounted on the surface of the support frame (5), a cleaning block (602) inside the fixed chamber (601), and an electric push rod (603) connected between the cleaning blocks (602).

2. The wastewater screening device for power plants according to claim 1, characterized in that, The grid plate is made of rubber grid strips (1), and multiple sets of grid strips (1) are parallel and spaced apart, with a dirt-collecting plate (2) fixed between adjacent grid strips (1).

3. The power plant wastewater bar screen interception device according to claim 1, characterized in that, The surface of the rolling roller (4) is specially provided with a groove that matches the edge of the grid plate. The rolling roller (4) meshes with the grid plate. Each group of rolling rollers (4) is connected by a rack and pinion. One group of rolling rollers (4) is directly connected to the output end of the drive motor (3).

4. The power plant wastewater screening device according to claim 1, characterized in that, The support frame (5) stably installs multiple sets of rolling rollers (4) inside the sewage tank and on the outside of the tank wall, and supports the grid plate in an inclined state.

5. The power plant wastewater screening device according to claim 1, characterized in that, The fixed chamber (601) is fixed on the surface of the support frame (5) between the two sets of rolling rollers (4) at the tail end.

6. The wastewater screening device for power plants according to claim 5, characterized in that, Multiple sets of electric push rods (603) are evenly installed inside the fixed chamber (601), with the output end of the electric push rod facing the grid plate.

7. A power plant wastewater screening device according to claim 1, characterized in that, The cleaning block (602) is connected to the output end of the electric push rod (603). The surface of the cleaning block (602) is provided with multiple protrusions. The volume of the protrusions is smaller than the size of the gap in the grid plate, and the height of the protrusions is greater than the depth of the gap in the grid plate. The outside of the protrusions is also wrapped with a soft brush.

8. A power plant wastewater bar screen interception device according to claim 1, characterized in that, A sludge collection tank (7) is provided directly below the sludge unloading assembly (6). The sludge collection tank (7) is fixedly installed on the outside of the sewage tank wall by a sludge collection frame (8). The opening of the sludge collection tank (7) is located directly below the sludge unloading assembly (6).

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