Multistage filtering device for landfill leachate treatment

Abstract

The utility model discloses a garbage leachate treatment technical field's multistage filtering device for garbage leachate treatment, including the box of filter case, the box top is equipped with the box cover of screw joint installation, the water guide pipe for introducing leachate is installed to the box one side, the bottom of box is provided with a plurality of groups of blowdown hole for blowdown, the bottom of box is embedded with a plurality of recesses for communicating blowdown pipe, the bottom center of box installs the drain pipe, the inside of box is embedded with the filter piece for carrying out multiple purification to sewage, through filter piece, multiple purification filtration is carried out to sewage, and then the dirt on the outside of filter piece is scraped and cleaned by cleaning part, avoid dirt accumulation and block the filter structure, and the dirt left after multiple filtration is discharged in time through blowdown hole and blowdown pipe, avoid dirt accumulation and block the filter structure.

Description

Technical Field

[0001] This utility model relates to the field of landfill leachate treatment, specifically a multi-stage filtration device for landfill leachate treatment. Background Technology

[0002] Landfill leachate is a high-concentration organic wastewater produced during landfill or incineration processes, resulting from rainwater infiltration, the moisture content of the waste itself, and the decomposition of organic matter. Its composition is complex, containing large amounts of suspended solids, COD (chemical oxygen demand), ammonia nitrogen, and heavy metals. If discharged directly without effective treatment, it will severely pollute soil, groundwater, and surface water, posing a significant threat to the ecological environment and human health. Multi-stage filtration, as a core component of landfill leachate pretreatment or advanced treatment, uses filtration structures with different pore sizes to progressively intercept pollutants, making it a key process for reducing the load on subsequent treatment processes and ensuring that the effluent meets standards. Currently, the multi-stage filtration equipment widely used in landfill leachate treatment mostly adopts the traditional design of stacked multiple filter structures. This structure has significant defects in actual operation and maintenance, which seriously restricts filtration efficiency and treatment stability. The front-end filter structure is prone to clogging, and it is difficult to clean the sludge. Leachate contains a large amount of suspended particulate matter (such as silt and garbage debris). During the multi-stage filtration process, these sludge will be preferentially intercepted by the front-end filter structure (such as coarse screen and primary filter membrane). Since the existing equipment does not have a convenient sludge scraping and discharge mechanism, the intercepted sludge will continue to accumulate on the surface of the filter structure, forming a dense sludge layer in a short time, which will cause the filter pores to be blocked and the leachate flow resistance to increase significantly. Cleaning requires stopping the machine and manually disassembling the equipment to remove the filter structure one by one for rinsing or scraping, which is cumbersome and time-consuming. The filter units of existing multi-stage filtration equipment are mostly connected to the inner wall of the container by bolts or welding, which makes the installation process complicated and makes it difficult to disassemble and replace the filter structure. This further increases the difficulty of maintenance and reduces the actual efficiency of the equipment. Clogging of the front-end filtration structure can cause leachate to short-circuit, meaning that unfiltered leachate bypasses the clogging area and directly enters the subsequent filtration unit. This causes the subsequent filter layer (such as a precision filter membrane) to prematurely trap a large number of large particles of dirt, accelerating the failure of the overall filtration system. Therefore, it is necessary to design a multi-stage filtration device for landfill leachate treatment to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a multi-stage filtration device for landfill leachate treatment, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage filtration device for treating landfill leachate, comprising a filter box body, a box cover screwed onto the top of the box body, a water guide pipe for introducing leachate installed on one side of the box body, multiple sets of drain holes for discharging sewage opened at the bottom of the box body, multiple grooves for connecting the drain pipe embedded at the bottom of the box body, the grooves corresponding to the drain holes, a filter element for multiple purification of sewage embedded inside the box body, and a cleaning element for cleaning the filter element installed inside the box body. The device includes four guide rings evenly arranged at the bottom of the housing. A filter screen is embedded on the outermost guide ring, and an adsorption pad is embedded on the outermost guide ring. Filter pads are embedded on the outer sides of the two guide rings in the middle position. The pore size of the two filter pads increases from the outside to the inside. The cleaning component includes a motor installed on the top of the housing cover. A rotating shaft is installed at the bottom of the motor via an output shaft. A fixing plate is fixedly installed on the outer side of the rotating shaft and near the top. Four connecting plates are evenly arranged on the bottom of the fixing plate. A cleaning brush is fixedly installed on one side of each connecting plate.

[0005] Preferably, a guide plate is installed on the outer side of the rotating shaft via multiple fixing rods.

[0006] Preferably, a snap-fit ​​plate is bolted to the top of the flow guide ring.

[0007] Preferably, a cleaning scraper is fixedly installed at the bottom of the connecting plate by bolts.

[0008] Preferably, a plurality of agitators arranged in a circular pattern are fixedly installed on the outer side of the rotating shaft and near its lower middle part.

[0009] Compared with the prior art, the beneficial effects of this utility model are: 1. The cover is screwed to the top of the tank, and the water pipe can guide the sewage into the tank. The sewage is purified and filtered through multiple filters. Then, the cleaning device scrapes and cleans the dirt on the outside of the filter to prevent dirt from accumulating and clogging the filter structure. The dirt left after multiple filtration is discharged in time through the drain hole and drain pipe to prevent dirt from accumulating and clogging the filter structure, thereby improving the filtration effect of the equipment in purifying sewage.

[0010] 2. The filter ring is ring-shaped, and the filter screen can block silt, large particles and other impurities in the sewage. The sewage is blocked and guided by the ring-shaped filter screen, so that the sewage is purified and filtered layer by layer around the outside of the filter screen. The two filter pads are filled with adsorption material, which can perform double adsorption filtration and purification of impurities in the sewage. After adsorption, the sewage enters the fourth filter ring outside the filter ring, where it is further adsorbed and purified by the high-precision adsorption pad. This increases the filtration area and prevents the sewage from being filtered inefficiently from only passing through one side, thus improving the filtration effect of multiple purification of sewage. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a left-side sectional perspective view of the overall structure of this utility model; Figure 3 The overall structure of this utility model Figure 2 Enlarged view of point A in the middle; Figure 4 The overall structure of this utility model Figure 2 Enlarged view at point B in the middle; Figure 5 This is a structural diagram of the guide ring, filter screen, and snap-on plate in the overall structure of this utility model; Figure 6 This is a schematic diagram of the cleaning component in the overall structure of this utility model.

[0012] In the diagram: 1. Box body; 2. Box cover; 3. Water guide pipe; 4. Drain hole; 5. Drain pipe; 6. Groove; 7. Drain pipe; 8. Guide ring; 9. Filter screen; 10. Adsorption pad; 11. Filter pad; 12. Motor; 13. Shaft; 14. Fixing plate; 15. Connecting plate; 16. Cleaning brush; 17. Guide plate; 18. Buckle plate; 19. Cleaning scraper; 20. Stirring plate; 131. Fixing rod. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0014] Please refer to Figure 1-6As shown, this utility model provides a multi-stage filtration device for landfill leachate treatment, including a filter box body 1, a box cover 2 screwed onto the top of the box body 1, a water guide pipe 3 for introducing leachate installed on one side of the box body 1, multiple sets of sewage discharge holes 4 for discharging sewage opened at the bottom of the box body 1, multiple grooves 6 for connecting the sewage discharge pipe 5 embedded at the bottom of the box body 1, a drain pipe 7 installed at the center of the bottom of the box body 1, the grooves 6 corresponding to the sewage discharge holes 4, filter elements for multiple purification of sewage embedded inside the box body 1, and cleaning elements for cleaning the filter elements installed inside the box body 1.

[0015] In addition, the cover 2 is screwed to the top of the body 1, and the water pipe 3 can guide the sewage into the body 1. The sewage is purified and filtered through multiple filters. Then, the cleaning device scrapes and cleans the dirt on the outside of the filter to prevent dirt from accumulating and clogging the filter structure. The dirt left after multiple filtration is discharged in time through the drain hole 4 and the drain pipe 5 to prevent dirt from accumulating and clogging the filter structure, thereby improving the filtration effect of the equipment in purifying sewage.

[0016] Specifically, the filter element includes four guide rings 8 evenly arranged at the bottom of the housing 1. A filter screen plate 9 is embedded on the outermost guide ring 8, and an adsorption pad 10 is embedded on the outermost guide ring 8. Filter pads 11 are embedded on the outer sides of the two guide rings 8 in the middle position. The filter pore size of the two filter pads 11 increases from the outside to the inside. A buckle plate 18 is installed on the top of the guide ring 8 by bolts.

[0017] Two snap-fit ​​plates 18 are installed on the top of the guide ring 8. The snap-fit ​​plates 18 have an L-shaped cross-section and are screwed to the snap-fit ​​plates 18 to lock and fix the filter screen plate 9, adsorption pad 10 and filter pad 11. The filter ring is annular. The filter screen plate 9 can block mud, sand, large particles and other dirt in the sewage. The sewage is blocked and guided by the annular filter screen plate 9 so that the sewage is purified and filtered layer by layer around the outside of the filter screen plate 9. The two filter pads 11 are filled with adsorption material. The filter pads 11 can perform double adsorption filtration and purification of impurities in the sewage. After adsorption, the sewage enters the fourth filter ring outside the filter ring and is adsorbed and purified again by the high-precision adsorption pad 10. This can increase the filtration area and prevent the sewage from being filtered from only one side with low efficiency, thus improving the filtration effect of multiple purification of sewage.

[0018] More specifically, the cleaning components include a motor 12 mounted on the top of the cover 2, a rotating shaft 13 mounted on the bottom of the motor 12 via an output shaft, a fixing plate 14 fixedly mounted on the outside of the rotating shaft 13 near the top, four evenly arranged connecting plates 15 integrally formed on the bottom of the fixing plate 14, a cleaning brush 16 fixedly mounted on one side of the connecting plate 15, a guide plate 17 mounted on the outside of the rotating shaft 13 via multiple fixing rods 131, a cleaning scraper 19 fixedly mounted on the bottom of the connecting plate 15 via bolts, and multiple circumferentially arranged agitator plates 20 fixedly mounted on the outside of the rotating shaft 13 near the lower middle part.

[0019] Furthermore, the motor 12 can drive multiple connecting plates 15 to rotate through the fixed plate 14. The cleaning brush 16 on one side of the connecting plate 15 can scrape and clean the dirt left by the filter screen plate 9, the adsorption pad 10 and the filter pad 11. The cleaning scraper 19 at the bottom of the connecting plate 15 can scrape and clean the dirt at the bottom of the box 1 so that the dirt at the bottom of the box 1 can be discharged through the drain hole 4 to avoid the accumulation of dirt.

[0020] The stirring plate 20 has a U-shaped cross section and is located outside the guide plate 17. The guide plate 17 is spiral-shaped. The rotating shaft 13 can drive the stirring plate 20 to stir the water flow, while the guide plate 17 guides the water flow downward to increase the outflow rate of the water flow.

[0021] Working principle: First, the leachate is introduced into the tank 1 through the water pipe 3. The filter screen 9 blocks the mud, sand, large particles and other dirt in the sewage. Then, the sewage is blocked and guided by the annular filter screen 9. Then, the sewage is purified and filtered layer by layer around the outside of the filter screen 9. Then, two filter pads 11 perform double adsorption filtration and purification of impurities in the sewage. After adsorption, the sewage enters the fourth filter ring through the filter ring. The high-precision adsorption pad 10 adsorbs and purifies the impurities in the water again. Then, the motor 12 is started, which drives the rotating shaft 13 to rotate. It drives multiple connecting plates 15 to rotate through the fixed plate 14. At this time, the cleaning brush 16 on one side of the connecting plate 15 scrapes and cleans the dirt left by the filter screen 9, adsorption pad 10 and filter pad 11. At the same time, the cleaning scraper 19 at the bottom of the connecting plate 15 scrapes and cleans the dirt at the bottom of the tank 1 so that the dirt at the bottom of the tank 1 can be discharged through the drain hole 4.

[0022] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage filtration device for landfill leachate treatment, comprising a filter housing (1), characterized in that: The top of the box (1) is screwed with a box cover (2). A water guide pipe (3) for introducing leachate is installed on one side of the box (1). The bottom of the box (1) is provided with multiple sets of sewage discharge holes (4) for sewage discharge. The bottom of the box (1) is embedded with multiple grooves (6) for connecting the sewage discharge pipe (5). A drain pipe (7) is installed at the center of the bottom of the box (1). The grooves (6) correspond to the sewage discharge holes (4). The inner side of the box (1) is embedded with a filter element for multiple purification of sewage. The inner side of the box (1) is installed with a cleaning element for cleaning the filter element. The filter element includes four guide rings (8) evenly arranged at the bottom of the box (1). The outermost ring is... The outer side of the guide ring (8) is fitted with a filter screen plate (9), and the outer side of the innermost guide ring (8) is fitted with an adsorption pad (10). The outer sides of the two guide rings (8) in the middle position are respectively fitted with filter pads (11). The filter pore diameter of the two filter pads (11) increases from the outside to the inside. The cleaning component includes a motor (12) installed on the top of the box cover (2). The bottom of the motor (12) is fitted with a rotating shaft (13) through the output shaft. A fixing plate (14) is fixedly installed on the outer side of the rotating shaft (13) and near the top. The bottom of the fixing plate (14) is integrally fitted with four evenly arranged connecting plates (15). A cleaning brush (16) is fixedly installed on one side of the connecting plate (15).

2. The multi-stage filtration device for landfill leachate treatment according to claim 1, characterized in that: A guide plate (17) is installed on the outside of the rotating shaft (13) via multiple fixing rods (131).

3. The multi-stage filtration device for landfill leachate treatment according to claim 1, characterized in that: The top of the guide ring (8) is fitted with a snap plate (18) by bolts.

4. The multi-stage filtration device for landfill leachate treatment according to claim 1, characterized in that: The bottom of the connecting plate (15) is fixed with a cleaning scraper (19) by bolts.

5. A multi-stage filtration device for landfill leachate treatment according to claim 2, characterized in that: Multiple agitator plates (20) arranged in a circular pattern are fixedly installed on the outer side of the rotating shaft (13) and near the middle and lower part.

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