Multilayer filtration sewage purification device

Abstract

The utility model relates to the technical field of sewage purification, in particular to a multi-layer filtering sewage purification device, which comprises a tank body, and a filtering layer group for purifying sewage is arranged in the tank body, and is characterized in that a water distribution pipe for introducing sewage to be filtered into the tank body is arranged in the tank body and is positioned above the filtering layer group; a water collecting pipe for discharging purified sewage out of the tank body is arranged in the tank body and positioned below the filter layer group, the water distributing pipe comprises a water distributing main pipe, one end, positioned in the tank body, of the water distributing main pipe is communicated with a plurality of water distributing branch pipes, and a plurality of drainage holes are formed in the lower surfaces of the water distributing branch pipes. Compared with the prior art, the water distribution pipe is arranged, so that the technical problem that the sewage filtering effect is influenced due to single water inlet mode in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model discloses a sewage purification technical field, specifically a kind of multilayer filtration sewage purification device. BACKGROUND

[0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering and other fields, and is an important part of environmental protection. The existing sewage filtration device is shown in the prior art such as patent No. CN202010788534.0 "multi-level circulation type sewage treatment device with filter assembly convenient to replace", patent No. CN202122033059.9 "sustained multi-layer medical sewage treatment equipment", and patent No. CN202220909043.1 "sewage purification system", which mainly filters sewage layer by layer through multi-layer filter cartridges or filter materials to achieve water purification. These sewage purification devices mainly improve the arrangement of filter cartridges and filter materials to improve water purification effect. However, the water inlet method is single, and the sewage is only introduced into the centralized filtration tank through the drain pipe, and the sewage is filtered through the filter material by siphon or gravity. When the sewage is always concentrated in a certain place of the filter material, the effective filtration area of the filter material will be quickly clogged, affecting the filtration effect of the sewage, and the other filtration areas cannot be effectively utilized, resulting in poor filtration effect of the entire filtration device. CONTENT OF THE UTILITY MODEL

[0003] The utility model intends to provide a kind of multilayer filtration sewage purification device, mainly for solving the technical problems of prior art, such as single water inlet method, only through drain pipe to introduce sewage into centralized filtration tank, and let sewage pass through filter material by siphon or gravity, when sewage is always concentrated in a certain place of filter material, effective filtration area of filter material will be quickly clogged, affecting filtration effect of sewage, and other filtration areas cannot be effectively utilized, resulting in poor filtration effect of entire filtration device.

[0004] To solve the above technical problems, the utility model provides the following technical scheme:

[0005] A kind of multilayer filtration sewage purification device, including tank body, filter layer group for purifying sewage is arranged in tank body, water distribution pipe for introducing sewage to be filtered into tank body is arranged in tank body above filter layer group, water collection pipe for discharging purified sewage out of tank body is arranged in tank body below filter layer group, water distribution pipe includes water distribution main pipe, and multiple water distribution branch pipes are communicated at one end of water distribution main pipe in tank body, and a plurality of drainage holes are formed in the lower surface of water distribution branch pipe.

[0006] The utility model discloses beneficial effect has:

[0007] Sewage is filtered after entering to the groove body through the water distribution pipe and is discharged from the water collecting pipe, wherein the water distribution pipe is connected through the arrangement of the water distribution main pipe and the water distribution branch pipe, the drainage holes are evenly distributed above the filter layer group, and the sewage into the groove body is divided into multiple branches and flows out from the drainage holes of the water distribution branch pipe, so that the sewage is evenly distributed above the filter layer group, avoiding the sewage from being concentrated in a certain place of the filter layer group for filtering, resulting in low filtering efficiency, solving the single water inlet mode of the prior art, only the sewage is concentrated and introduced into the centralized filter tank through the drain pipe, the sewage passes through the filter material through siphon or gravity, when the sewage is always concentrated in a certain place of the filter material for filtering, the effective filtering area of the filter material will be quickly blocked, affecting the filtering effect of the sewage, and other filtering areas cannot be effectively utilized, resulting in the technical problem of poor filtering effect of the whole filtering device.

[0008] Preferably, the filter layer group comprises a gravel layer, a water-permeable geotextile and a biological purification layer from bottom to top, the gravel layer is composed of a plurality of gravel blocks, the biological purification layer comprises soil rich in microbial bodies for treating sewage, and the water collecting pipe is located in the gravel layer. In the scheme, the sewage is purified through the biological purification layer, the impurities in the sewage are intercepted by the fine soil, and the intercepted sludge is digested and decomposed by the microbial bodies to achieve the purpose of water purification. The water filtered by the soil enters the gravel layer through the water-permeable geotextile, the water-permeable geotextile can filter the water again and prevent the soil from entering the gravel layer; the filtered water enters the water collecting pipe from the gravel layer, and the gravel layer has large pores, mainly to provide support for the water distribution pipe and the water-permeable geotextile, so that the biological essence layer and the water distribution pipe maintain a certain water permeable gap, and the filtering effect is improved.

[0009] Preferably, all the water distribution branch pipes are communicated at the ends away from the water distribution main pipe. In the scheme, the water distribution branch pipes are communicated to form a water flow network, increasing the flowability of the water in the water distribution pipe and avoiding the pipe from being unable to work due to local blockage.

[0010] Preferably, the middle parts of all the water distribution branch pipes are commonly communicated with a through pipe, and the ends of the water distribution branch pipes away from the water distribution main pipe are provided with scraping devices for scraping sludge on the inner walls of the water distribution branch pipes from the drainage holes. In the scheme, the through pipe can make all the water distribution branch pipes form a water flow network, increasing the flowability of the water in the water distribution pipe; the scraping devices can be used for periodically cleaning the inner walls of the water distribution branch pipes, preventing the drainage holes of the water distribution branch pipes from being blocked by sludge for a long time and affecting normal work.

[0011] Preferably, the scraping device comprises a plug cover detachably and rotatably connected to the water distribution branch pipe, the plug cover is provided with a scraping strip close to one side of the water distribution branch pipe, the scraping strip is in contact with the inner wall of the water distribution branch pipe, and a supporting ring is fixed to the end of the scraping strip away from the water distribution branch pipe. In the scheme, the plug cover is used to plug the water distribution branch pipe to prevent a large amount of sewage from flowing out of the pipe opening, the scraping strip is scraped over the inner wall of the water distribution branch pipe by rotating the plug cover, and the sludge blocking the drain hole is scraped away to enable the drain hole to normally drain water; and the supporting ring is used to make the scraping strip to prevent the scraping strip from being deformed after long-term use and from not being in close contact with the inner wall of the water distribution branch pipe.

[0012] Preferably, the water collecting pipe comprises a water collecting main pipe and a plurality of water collecting branch pipes, and a plurality of water collecting holes are formed in the upper surfaces of the water collecting branch pipes. The purified water is discharged out of the water tank through the water collecting holes.

[0013] Preferably, the other end of the water collecting pipe is located outside the tank body and is provided with a drain valve, a backwashing device is further arranged on the water collecting pipe and between the drain valve and the tank body, the backwashing device comprises a backwashing pipe in communication with the water collecting pipe, the upper end of the backwashing pipe is higher than the water tank, a one-way valve is arranged at the upper end of the backwashing pipe, and a gas charging pump capable of charging gas into the backwashing pipe is arranged at the end of the one-way valve away from the backwashing pipe. In the scheme, when the liquid level in the water tank rises, it indicates that the filtering efficiency of the filter layer is reduced, mainly due to that the geotextile is accumulated with too much sludge and the air permeability is reduced. At this time, the drain valve is closed and the water supply to the tank body is stopped, then the gas charging pump is turned on to charge gas into the backwashing pipe, the gas is introduced into the tank body through the backwashing pipe and the water collecting pipe, and the gas is uniformly distributed into a plurality of small bubbles through the water collecting holes on the water collecting branch pipes and the gaps between the gravel to impact the geotextile, thereby backwashing the sludge on the geotextile and improving the water permeability of the geotextile. When the gas pressure in the backwashing pipe is unbalanced to generate negative pressure, the one-way valve can prevent the water from flowing back into the gas charging pump to damage the gas charging pump. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an embodiment 1 of the multi-layer filtering sewage purification device of the utility model patent;

[0015] Figure 2 It is an embodiment 1 of the multi-layer filtering sewage purification device of the utility model patent; Figure One ;

[0016] Figure 3 It is an embodiment 1 of the multi-layer filtering sewage purification device of the utility model patent; Figure Two ;

[0017] Figure 4 It is an embodiment 1 of the multi-layer filtering sewage purification device of the utility model patent; Figure Three (Provided with a filter layer group);

[0018] Figure 5 This is a three-dimensional structural diagram of Example 2 of a multi-layer filtering sewage purification device of the utility model patent;

[0019] Figure 6 This is a water distribution pipe structure diagram of Example 2 of a multi-layer filtering sewage purification device of the utility model patent.

[0020] The figure marks in the drawings of the specification include: trough body 1, filter layer group 2, gravel layer 21, permeable geotextile 22, biological purification layer 23, water distribution main pipe 311, water distribution branch pipe 312, conducting pipe 33, plugging cover 34, scraper 35, support ring 36, water collection main pipe 41, water collection branch pipe 42, drain valve 43, backwash pipe 5, one-way valve 51, and air pump 52. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1:

[0023] like Figures 1-4 As shown, a multi-layer filtering sewage purification device includes a tank body 1, which is made of fiberglass. The top of the tank body 1 is opened for aeration. A filter layer group 2 for purifying sewage is arranged inside the tank body 1. A water distribution pipe for introducing the sewage to be filtered into the tank body 1 is arranged inside the tank body 1 and above the filter layer group 2. A water collection pipe for discharging the purified sewage out of the tank body 1 is arranged inside the tank body 1 and below the filter layer group 2.

[0024] like Figure 4 As shown, the filter layer group 2 comprises, from bottom to top, a gravel layer 21, a permeable geotextile 22, and a biological purification layer 23. The biological purification layer 23 comprises soil rich in microorganisms that treat sewage. Sewage is purified through the biological purification layer 23, with impurities in the sewage trapped by the fine soil. The trapped sludge is digested and decomposed by the microorganisms in the soil, achieving the purpose of water purification. Water filtered by the soil enters the gravel layer 21 through the permeable geotextile 22. The permeable geotextile 22 filters the water again while preventing soil from entering the gravel layer 21. The gravel layer 21 is composed of several crushed stones, and the water collection pipe is located within the gravel layer 21. The crushed stones provide support for the water distribution pipe and the permeable geotextile 22, maintaining a certain permeable gap between the biological essence layer and the water distribution pipe, improving the filtration effect.

[0025] The water distribution pipe comprises a water distribution main pipe 311, a plurality of water distribution branch pipes 312 are communicated at one end of the water distribution main pipe 311 in the tank body 1, the lower surfaces of the water distribution branch pipes 312 are each provided with a plurality of water drainage holes, and the ends, away from the water distribution main pipe 311, of all the water distribution branch pipes 312 are communicated, the water distribution branch pipes 312 are communicated with each other to form a water flow network, so that the flowability of water in the water distribution pipe is increased, and the water distribution pipe can work normally without being blocked locally.

[0026] The water collection pipe comprises a water collection main pipe 41 and a plurality of water collection branch pipes 42, the upper surfaces of the water collection branch pipes 42 are provided with a plurality of water collection holes, and the water collection branch pipes 42 are similar to the water distribution branch pipes 312 in principle, so that the water collection holes are uniformly distributed on the bottom of the tank body 1 by arranging the water collection branch pipes 42, and the water drainage efficiency is improved.

[0027] The other end of the water collection pipe is located outside the tank body 1 and is provided with a water drainage valve 43, a backwashing device is further arranged on the water collection pipe and between the water drainage valve 43 and the tank body 1, the backwashing device comprises a backwashing pipe 5 which is communicated with the water collection pipe, the upper end of the backwashing pipe 5 is higher than the water tank, so that the purified water cannot be discharged from the backwashing pipe 5, and a one-way valve 51 is arranged at the upper end of the backwashing pipe 5, and the end, away from the backwashing pipe 5, of the one-way valve 51 is provided with an air charging pump.

[0028] When the liquid level in the water tank rises, it is proved that the filtering efficiency of the filtering layer is reduced, mainly because the air permeability of the water permeable geotextile 22 is reduced due to too much sludge accumulated on the water permeable geotextile 22, at this time, the water drainage valve 43 is closed and the water supply to the tank body 1 is stopped, then the air charging pump 52 is opened to charge air into the backwashing pipe 5, the air is introduced into the tank body 1 through the backwashing pipe 5 and the water collection pipe, and is uniformly distributed into a plurality of small air bubbles by the water collection holes on the water collection branch pipes 42 and the gaps between the gravels, so that the air bubbles impact the water permeable geotextile 22, the sludge on the water permeable geotextile 22 is backwashed, and the water permeability of the water permeable geotextile 22 is improved.

[0029] From the above, the technical principle of the utility model is as follows:

[0030] After the sewage is filtered by the filter screen to remove large impurities, the sewage is introduced into the water distribution pipe, and is uniformly distributed on the upper side of the filtering layer group 2 by the water distribution branch pipes 312, the sewage is filtered by the soil of the biological purification layer 23, and then is filtered by the water permeable geotextile 22 to be stored in the gravel layer 21, and then is introduced into the water collection main pipe 41 through the water collection holes on the water collection branch pipes 42 to be discharged.

[0031] When the liquid level in the tank body 1 rises, it is proved that the filtering efficiency of the filtering layer group 2 is reduced, mainly because the air permeability of the water permeable geotextile 22 is reduced due to too much sludge accumulated on the water permeable geotextile 22, at this time, the water drainage valve 43 is closed and the water supply to the tank body 1 is stopped, then the air charging pump 52 is opened to charge air into the backwashing pipe 5, the air bubbles impact the water permeable geotextile 22, the sludge on the water permeable geotextile 22 is washed away, the water permeability of the water permeable geotextile 22 is restored, and the whole multilayer filtering ecological sewage purification device is restored to normal work.

[0032] Embodiment 2:

[0033] As Figure 5 , Figure 6 shown, unlike embodiment 1, the middle parts of all the water distribution branch pipes 312 are communicated with a through pipe 33, the through pipe 33 can make all the water distribution branch pipes 312 form a water flow network, and increase the flowability of water in the water distribution pipe; the end of the water distribution branch pipe 312 away from the water distribution main pipe 311 is provided with a scraping device for scraping the sludge on the inner wall of the water distribution branch pipe 312 from the drainage hole, the scraping device comprises a plug cover 34 screwed on the water distribution branch pipe 312, the plug cover 34 is provided with a scraping strip 35 on the side close to the water distribution branch pipe 312, the scraping strip 35 is in contact with the inner wall of the water distribution branch pipe 312, and the end of the scraping strip 35 away from the water distribution branch pipe 312 is fixed with a supporting ring 36; the plug cover 34 is used for preventing a large amount of sewage from flowing out of the pipe opening of the water distribution branch pipe 312, and rotating the plug cover 34 can make the scraping strip 35 scrape the inner wall of the water distribution branch pipe 312, scrape the sludge blocking the drainage hole, and make the drainage hole normally drain water; when a large amount of sludge is accumulated in the water distribution branch pipe 312 and cannot be quickly drained, the plug cover 34 is unscrewed and separated from the water distribution branch pipe 312, and the sludge can be flushed out of the end of the water distribution branch pipe 312 by water; the supporting ring 36 is used for manufacturing the scraping strip 35, and prevents the scraping strip 35 from being deformed after long-term use and not being attached to the inner wall of the water distribution branch pipe 312.

[0034] The above-mentioned is only the embodiment of the present application, and the specific structure and characteristics of the scheme and the like are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection range of the present application, and these will not affect the effect and practicality of the present application. The protection range claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A multi-layer sewage purification device for filtering sewage, comprising a tank body, a filter layer group for purifying sewage is arranged in the tank body, characterized in that: The water distribution pipe is arranged in the groove and above the filter layer group, and the water collecting pipe is arranged in the groove and below the filter layer group.

2. A multi-layered filtration and purification device for sewage water according to claim 1, characterized in that: The filter layer group comprises a gravel layer, a water permeable geotextile and a biological purification layer from bottom to top.

3. A multi-layered filtration and purification device for sewage water according to claim 2, characterized in that: The ends of all the water distribution branch pipes are communicated.

4. A multi-layered filtration and purification device for sewage water according to claim 2, characterized in that: The middle parts of all the water distribution branch pipes are jointly communicated with a guide pipe.

5. A multi-layered sewage filtering and purifying device according to claim 4, characterized in that: The scraping device comprises a plug cover which is detachably and rotationally connected to the water distribution branch pipe.

6. A multi-layered filtration and purification device for sewage water according to claim 1, characterized in that: The water collecting pipe comprises a water collecting main pipe and a plurality of water collecting branch pipes.

7. A multi-layered filtration and purification device for sewage water according to claim 1, characterized in that: The other end of the water collecting pipe is located outside the groove and is provided with a drain valve. The backwashing device is arranged on the water collecting pipe between the drain valve and the groove. The backwashing device comprises a backwashing pipe which is communicated with the water collecting pipe. The upper end of the backwashing pipe is higher than the water tank. The upper end of the backwashing pipe is provided with a one-way valve. The one-way valve is provided with an air pump which can inflate the backwashing pipe.

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