Sewage treatment device with deodorization function

Abstract

The application discloses a sewage treatment device with a deodorization function, which is arranged between an oil separation tank and a municipal sewage pipe and comprises a base body and a water-blocking oil-passing layer arranged in the base body; a first filter core, which is an oil adsorption layer and is arranged outside the water-blocking oil-passing layer; and a second filter core, which is arranged below the first filter core, is arranged outside the water-blocking oil-passing layer and is a water adsorption layer; a flow guide channel is arranged between the oil adsorption layer and the water adsorption layer and is used for guiding oil and water to enter the oil adsorption layer and the water adsorption layer, respectively. The residual oil in the water adsorption layer can be discharged through the water-blocking oil-passing layer or enter the oil adsorption layer through the flow guide channel, and the water in the oil adsorption layer naturally falls to the water adsorption layer under the blocking of the water-blocking oil-passing layer and the action of gravity. Through the above process, the oil and water in sewage are separated, the oil returns to the oil separation tank, and the water is discharged into the municipal sewage pipe, so that the accumulation of oil stains in the municipal sewage pipe is effectively reduced, and the pipe blockage and black and smelly phenomenon are prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of municipal sewage treatment technology, in particular to a sewage treatment device with deodorization function. BACKGROUND

[0002] The "garbage" carried in municipal sewage (mainly from daily life discharge) has complex composition and mixed diversity, which can be roughly divided into two categories: solid garbage and organic pollutants. Organic pollutants usually exist in dissolved or suspended state, consume a large amount of oxygen after entering the water body, cause water body to be oxygen-deficient, and thus cause phenomena such as blackening and odor. Among them, fat, oil and grease (commonly known as FOG) are a typical kind of organic pollutants, which have a wide range of sources, including cooking oil, animal fat, butter, skin care products, etc. FOG is easy to solidify at low temperature and adhere to the inner wall of the pipeline, which not only gradually accumulates to cause pipeline blockage, but also is one of the main causes of odor in the sewer.

[0003] In order to solve this problem, it is usually required to set up a grease trap in the catering business area. The kitchen drainage must be pretreated by the grease trap first, and then the most part of oil and food residue is separated and removed before being discharged into the municipal sewage pipe network. However, the filtering effect of the grease trap is limited, and the effluent still contains a certain amount of floating oil, emulsified oil and dissolved oil. These residual oils enter the municipal drainage system and continue to ferment under anaerobic conditions, producing hydrogen sulfide and other foul-smelling gases, which are still an important reason for the blackening and odor of municipal sewage. Therefore, how to further improve the grease separation efficiency and control the FOG into the network is still a key challenge in the current municipal sewage treatment. SUMMARY

[0004] Therefore, the present application aims at the defects in the prior art, and the main purpose is to provide a sewage treatment device with deodorization function, which solves the above problems.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a sewage treatment device with deodorization function is used between the grease trap and the municipal sewage pipe, which comprises a base body and a:

[0006] water-blocking and oil-passing layer;

[0007] a first filter core, which is an oil adsorption layer and is arranged outside the water-blocking and oil-passing layer;

[0008] a second filter core, which is arranged below the first filter core and outside the water-blocking and oil-passing layer, and the second filter core is a water adsorption layer, and a flow guide channel is arranged between the oil adsorption layer and the water adsorption layer, and the flow guide channel is used to guide oil and water to enter the oil adsorption layer and the water adsorption layer respectively.

[0009] Further, the oil adsorption layer is made of polypropylene fiber or glass fiber.

[0010] Further, the water adsorption layer is a mesh film made of N-isopropyl acrylamide.

[0011] Further, the water-oil blocking layer is a mesh film made of ePTFE.

[0012] Further, the inner cavity of the base body is further provided with a central oil discharge pipe, a side wall of the central oil discharge pipe is provided with an opening communicating the first filter core and the second filter core, and the water-oil blocking layer is arranged in the opening.

[0013] Further, the central oil discharge pipe is sequentially provided, from top to bottom, with a first partition plate connected with the inner wall of the base body, a second partition plate and a third partition plate, and an oil collection cavity is formed above the first partition plate, and a water collection cavity is formed below the third partition plate.

[0014] The first filter core is arranged between the first partition plate and the second partition plate, the second filter core is arranged between the second partition plate and the third partition plate, and the flow guide channel is arranged on the second partition plate.

[0015] Further, the first partition plate and the third partition plate are respectively provided with a first channel and a second channel corresponding to the oil adsorption layer and the water adsorption layer, the first channel communicates with the oil collection cavity, and the second channel communicates with the water collection cavity.

[0016] One end of the oil adsorption layer extends into the first channel, one end of the water adsorption layer extends into the second channel, and a supporting member for supporting the corresponding adsorption layer is arranged in the first channel and the second channel.

[0017] Further, one side of the base body is communicated with a water inlet pipe, and the water inlet pipe is arranged corresponding to the second partition plate; one side of the second partition plate corresponding to the water inlet pipe is provided with a notch, a filter screen is arranged between the first partition plate and the third partition plate, and the filter screen is adapted to the contour of the notch.

[0018] Further, the shell wall of the base body is provided with a sandwich layer, and a heating member is arranged in the inner cavity of the sandwich layer.

[0019] Further, a sewage discharge pipe is arranged at the lower part of one side of the base body, and the third partition plate is inclined at the position corresponding to the inlet end of the sewage discharge pipe.

[0020] Compared with the prior art, the present application has obvious advantages and beneficial effects, specifically, the residual oil in the water adsorption layer can be discharged through the water-oil blocking layer, or enter the oil adsorption layer through the flow guide channel; the water in the oil adsorption layer naturally falls to the water adsorption layer under the blocking of the water-oil blocking layer and the action of gravity. Through the above process, the oil and water in the sewage are separated: the oil returns to the oil separation tank, and the water is discharged into the municipal sewage pipe, thereby effectively reducing the accumulation of oil stains in the municipal sewage pipe, preventing pipe blockage and black and smelly phenomenon.

[0021] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of embodiment 1 of the present application.

[0023] Figure 2 is a first perspective view of embodiment 1 of the present application.

[0024] Figure 3 is a second perspective view of embodiment 1 of the present application.

[0025] Figure 4 is a third perspective view of embodiment 1 of the present application.

[0026] Figure 5 is a cross-sectional view of the first or third partition of embodiment 1 of the present application.

[0027] Figure 6 is a cross-sectional view of the second partition of embodiment 1 of the present application. Figure 2 is an enlarged view of A of embodiment 1 of the present application.

[0028] Figure 7 is a fourth perspective view of embodiment 1 of the present application.

[0029] Brief Description of the Drawings:

[0030] base 10, water inlet pipe 101, interlayer 102, heating element 103, drain pipe 104, central oil drain pipe 11, opening 111, first partition 12, second partition 13, notch 131, third partition 14, oil collection cavity 15, water collection cavity 16, first passage 17, second passage 18, support 19;

[0031] water-blocking oil-blocking layer 20;

[0032] first filter core 30;

[0033] second filter core 40;

[0034] flow guide passage 50;

[0035] filter screen 60. DETAILED DESCRIPTION

[0036] Reference will now be made to the drawings, in which: Figures 1-2 Fig. 1 shows the specific structure of the preferred first embodiment of the present application, which is a sewage treatment device with deodorizing function, used between an oil separation tank and a municipal drain pipe, comprising a base 10 and, disposed within the base 10, a water-blocking oil-blocking layer 20, a first filter core 30, a second filter core 40, a flow guide passage 50, and a filter screen 60.

[0037] water-blocking oil-blocking layer 20;

[0038] first filter core 30, which is an oil adsorption layer, is disposed outside the water-blocking oil-blocking layer 20;

[0039] The second filter core 40 is arranged below the first filter core 30 and surrounds the water-oil blocking layer 20, and the second filter core 40 is a water adsorption layer. A flow guide channel 50 is arranged between the water adsorption layer and the oil adsorption layer, and the flow guide channel 50 is used to guide the oil and water to enter the oil adsorption layer and the water adsorption layer, respectively. The sewage discharged from the oil separation tank enters the base body 10 and contacts the water adsorption layer and the oil adsorption layer. The water adsorption layer adsorbs the water in the sewage by virtue of the hydrophilic and oleophobic properties, and the oil adsorption layer adsorbs the oil by virtue of the oleophilic and hydrophobic properties. The residual oil in the water adsorption layer can be discharged through the water-oil blocking layer 20 or enter the oil adsorption layer through the flow guide channel 50. The water in the oil adsorption layer naturally falls to the water adsorption layer under the blocking of the water-oil blocking layer 20 and the action of gravity. Through the above process, the oil and water in the sewage are separated: the oil returns to the oil separation tank, and the water is discharged into the municipal sewage pipe, thereby effectively reducing the accumulation of oil stains in the municipal sewage pipe, preventing the pipe from being blocked and preventing the black and smelly phenomenon.

[0040] As shown in Figure 2 , the oil adsorption layer is made of polypropylene fiber or glass fiber. When the oil-water mixture flows through the adsorption layer, the oleophilic properties of the fiber surface can capture and adsorb the tiny oil droplets in the sewage. As the adsorbed oil droplets gradually gather and increase in particle size, the oil droplets will be detached from the fiber surface under the action of buoyancy because their density is lower than that of water. The detached oil droplets can be discharged through the water-oil blocking layer 20 or float to the top of the oil adsorption layer and accumulate to form an oil layer under the push of the sewage flow, so as to be collected.

[0041] It should be noted that the water can flow more smoothly through the gap between the fibers and continue to flow downward because it is not wetted by the hydrophobic fiber material. Under the interception of the water-oil blocking layer 20 and the action of gravity, the water flow is guided into the water adsorption layer below, thereby realizing efficient separation and separate disposal of oil and water.

[0042] As shown in Figure 2 , the water adsorption layer is a mesh film made of N-isopropyl acrylamide. This material has a significant temperature-sensitive property, and its hydrophilic / hydrophobic behavior reversibly switches with temperature changes: at a lower temperature (usually below 32°C), the amide group (-CONH-) on the PNIPAM molecular chain can form a large number of hydrogen bonds with water molecules, causing the molecular chain to hydrate and stretch and be in a swollen state, absorbing a large amount of water and forming a dense hydration layer on the material surface. The hydration layer effectively blocks oil molecules from contacting the material body and exhibits strong hydrophilicity and excellent oil pollution resistance.

[0043] The water temperature in the municipal sewage pipe is usually between 10°C and 25°C, although it varies depending on the use but basically does not exceed 32°C, so under actual operating conditions, the water adsorption layer can continuously maintain the hydrophilic and oleophobic state, efficiently adsorb and lock water, and effectively repel oil.

[0044] When the ambient temperature is higher than 32°C, the thermal motion of the PNIPAM molecular chain is intensified, the hydrogen bond network is destroyed, and the hydrophobic group isopropyl (-CH(CH3)2) dominates, causing the molecular chain to shrink and change into a hydrophobic collapsed state. At this time, the material can expel the absorbed water and show affinity for oil. However, within the normal temperature range of municipal sewage discharge, the material can stably maintain its hydrophilic and oil-repellent properties, thereby significantly improving the water quality, effectively reducing the oil entrained in the discharged water, and enhancing the overall purification effect.

[0045] As shown in Figure 3 , the water-repellent and oil-permeable layer 20 is an ePTFE-made mesh film. This material has strong hydrophobicity, with a contact angle with water greater than 120°, which can effectively prevent viscous substances from adhering to the film surface, and has more excellent anti-pollution performance than traditional hydrophilic film materials (such as PVDF). The ePTFE film has a relatively large pore structure, allowing oil molecules to pass through the pores under the action of external driving force (such as pressure difference). Although ePTFE itself also shows certain oil-repellent properties, which hinders the spontaneous wetting of oil on its surface, but in actual operation, under the push of sewage, this resistance can be overcome, and the oil can be pushed and passed through the membrane pores, realizing the smooth discharge of oil.

[0046] It should be noted that due to the low adhesion of the ePTFE surface, oil is not easy to stick or accumulate on the membrane, thereby significantly reducing the membrane pollution problem while ensuring the oil-water separation efficiency, prolonging the service life.

[0047] As shown in Figure 3 , the inner cavity of the base body 10 is also provided with a central oil discharge pipe 11, the side wall of the central oil discharge pipe 11 is provided with an opening 111 communicating the first filter core 30 and the second filter core 40, and the water-repellent and oil-permeable layer 20 is arranged in the opening 111. This structure enables the oil separated and adsorbed by the first filter core 30 and the second filter core 40 to smoothly enter the central oil discharge pipe 11 for centralized collection through the opening 111. At the same time, the water-repellent and oil-permeable layer 20 can effectively prevent water from entering the oil discharge pipe due to its strong hydrophobicity and selective permeability, ensuring that the central oil discharge pipe 11 mainly collects oil rather than water, further enhancing the oil-water separation efficiency and improving the purity of oil recovery.

[0048] As shown in Figure 3 , the central oil discharge pipe 11 is sequentially provided with a first partition plate 12, a second partition plate 13 and a third partition plate 14 connected to the inner wall of the base body 10 from top to bottom, and an oil collection cavity 15 is formed above the first partition plate 12, and a water collection cavity 16 is formed below the third partition plate 14;

[0049] The first filter core 30 is arranged between the first partition plate 12 and the second partition plate 13, the second filter core 40 is arranged between the second partition plate 13 and the third partition plate 14, and the flow guide channel 50 is arranged on the second partition plate 13. The partition plate structure not only effectively positions and fixes the two-stage filter cores to prevent them from being deviated under the impact of sewage, but also realizes clear division of the oil-water separation area; in the actual operation process, the oil collection cavity 15 can collect the oil layer separated from the oil adsorption layer and floated, and the water collection cavity 16 receives the effluent purified by the water adsorption layer. The efficiency and stability of oil-water separation are improved, and the two types of media, oil and water, can be classified and orderly discharged, thereby enhancing the processing effect and operation reliability of the overall device.

[0050] It should be noted that the water collection cavity 16 is communicated with a drain pipe for discharging the filtered water in it into a municipal pipeline, the oil collection cavity 15 is communicated with the central oil discharge pipe 11, and the bottom end of the central oil discharge pipe 11 is communicated with an oil discharge pipe for discharging the collected oil into an oil separation tank.

[0051] As shown in Figure 3 , for example, the first partition plate 12 and the third partition plate 14 are respectively provided with a first channel 17 and a second channel 18 corresponding to the oil adsorption layer and the water adsorption layer, the first channel 17 is communicated with the oil collection cavity 15, and the second channel 18 is communicated with the water collection cavity 16.

[0052] One end of the oil adsorption layer extends into the first channel 17, and one end of the water adsorption layer extends into the second channel 18, and the first channel 17 and the second channel 18 are both provided with a support 19 for supporting the corresponding adsorption layer. The channel structure of the first channel 17 and the second channel 18 not only positions and limits the oil adsorption layer and the water adsorption layer to prevent displacement due to fluid impact, but also further optimizes the oil-water separation process by constraining the fluid path. After the oil is mainly separated through the mesh of the water adsorption layer and enters the oil collection cavity 15 through the first channel 17, the water is separated through the mesh of the oil adsorption layer and flows into the water collection cavity 16 through the second channel 18. At this time, the guide structure effectively avoids the mutual disturbance of oil and water or the flow through the unexpected path, thereby significantly improving the separation efficiency and the reliability of material use.

[0053] As shown in Figure 2As shown, the base 10 side is communicated with the water inlet pipe 101, and the water inlet pipe 101 is arranged corresponding to the second partition plate 13; the second partition plate 13 is provided with a notch 131 on the side corresponding to the water inlet pipe 101, a filter screen 60 is arranged between the first partition plate 12 and the third partition plate 14, and the filter screen 60 is adapted to the contour of the notch 131. Since the water-blocking oil-passing layer 20, the oil adsorption layer and the water adsorption layer have high manufacturing costs, and municipal sewage from the oil separation tank still contains impurities such as food residues, sediments and silt. If these impurities directly contact the adsorption layer, it is easy to cause blockage or pollution, affecting the separation performance and service life. Therefore, the device realizes preliminary filtration by adding the filter screen 60, effectively intercepts large solid particles, avoids them from entering the subsequent precision filtration unit, thereby protecting the core adsorption material and improving the filtration efficiency and durability of the overall equipment. In addition, the filter screen 60 is connected with the inner wall of the base 10 by clamping or fixing at both ends, which not only is stable in installation, but also can enhance the structural stability under the impact of sewage, further optimizing the screening effect.

[0054] As shown in the figure, Figure 6 As shown, the base 10 shell wall is provided with a sandwich layer 102, and the inner cavity of the sandwich layer 102 is provided with a heating element 103. The heating element 103 can adopt a structure such as a heating wire or a heating rod, which functions to soften the solidified oil by heating to restore the flowability. The softened oil can smoothly enter the oil adsorption layer and be discharged into the oil collection cavity 15 through the first channel 17, and finally be collected into the central oil discharge pipe 11 and discharged; in addition, it can also directly enter the central oil discharge pipe 11 through the water-blocking oil-passing layer 20.

[0055] It should be noted that when the temperature inside the base 10 is higher than 32°C, the temperature-sensitive water adsorption layer (PNIPAM material) will change from a hydrophilic state to a hydrophobic state, and actively discharge the absorbed water. This mechanism not only effectively avoids blockage or performance degradation of the water adsorption layer due to accumulated water, but also helps to maintain stable operation of the device under complex working conditions such as low temperature and high fat, further improving the overall efficiency and reliability of oil-water separation.

[0056] As shown in the figure, Figure 7 As shown, the base 10 is provided with a sewage discharge pipe 104 at the lower part of one side, and the third partition plate 14 is inclined at the position corresponding to the inlet end of the sewage discharge pipe 104. The inclined structure helps to guide the solid particles, sludge and other impurities settled at the bottom to the inlet of the sewage discharge pipe 104, avoiding their accumulation on the bottom of the cavity. The inclined surface can reduce the adhesion or retention of pollutants at the partition plate, making it easier for sludge and sediments to enter the sewage discharge pipe with water flow, reducing the risk of blockage and improving the sewage discharge efficiency.

[0057] In summary, the design of the present application focuses on;

[0058] 1.1 The water from the oil separator flows into the device through the inlet pipe 101. The filter screen 60 intercepts large solid particles such as residues and precipitates at the position of the gap 131 of the second partition 13, preventing the subsequent adsorption layer from being blocked.

[0059] 2.1 The sewage flows and contacts;

[0060] 2.2 Oil adsorption layer: The oil droplets are captured by the oleophilic fibers. After the oil droplets coalesce, the density of the oil droplets is less than that of water, and the desorbed oil can enter the central oil discharge pipe 11 through the water-blocking and oil-passing layer 20 or float to the oil collection cavity 15 and then flow into the central oil discharge pipe.

[0061] 2.3 Water adsorption layer: At a municipal sewage temperature of 10-25°C, the PNIPAM is in a hydrophilic state, adsorbs water and forms an oil-resistant hydration layer, and the oil is repelled. The water in the oil adsorption layer penetrates downward under the action of gravity and enters the water adsorption layer through the flow guide channel 50. The residual oil in the water adsorption layer floats to the oil adsorption layer through the flow guide channel 50.

[0062] 3.1 Oil flow path: oil collection cavity 15→first channel 17→central oil discharge pipe 11→oil discharge pipe→return to oil separator.

[0063] 3.2 Water flow path: water collection cavity 16→second channel 18→water discharge pipe→discharge into municipal pipe network.

[0064] Impurity discharge: The settled sludge slides along the inclined surface of the third partition 14 into the sewage discharge pipe 104 and is discharged regularly.

[0065] 4.1, Oil solidification: Start the heating element 103 such as a heating wire to soften the solidified oil and restore its fluidity for separation. If the temperature is greater than 32°C, the water adsorption layer automatically changes to a hydrophobic state, releasing the internal water, preventing blockage and discharging residual oil.

[0066] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application in any way. Any minor modification, equivalent change and modification made in accordance with the technical essence of the present application to the above embodiment are still within the scope of the technical solution of the present application.

Claims

1. A sewage treatment device with deodorizing function, used between an oil separation tank and a municipal sewage pipe, characterized in that: The base body (10) and the water-blocking and oil-blocking layer (20) arranged in the base body (10) comprise: A water-blocking and oil-blocking layer (20); A first filter core (30) is an oil adsorption layer and is arranged outside the water-blocking and oil-blocking layer (20); A second filter core (40) is arranged below the first filter core (30) and outside the water-blocking and oil-blocking layer (20), and the second filter core (40) is a water adsorption layer, a flow guide channel (50) is arranged between the oil adsorption layer and the water adsorption layer, and the flow guide channel (50) is used for guiding oil and water to enter the oil adsorption layer and the water adsorption layer, respectively. The water adsorption layer is a mesh film made of N-isopropyl acrylamide, the base body (10) further comprises a central oil discharge pipe (11) arranged in the inner cavity of the base body (10), the side wall of the central oil discharge pipe (11) is provided with an opening (111) communicating with the first filter core (30) and the second filter core (40), the water-blocking and oil-blocking layer (20) is arranged in the opening (111), the central oil discharge pipe (11) is sequentially provided with a first partition plate (12), a second partition plate (13) and a third partition plate (14) connected with the inner wall of the base body (10) from top to bottom, and an oil collecting cavity (15) is formed above the first partition plate (12), and a water collecting cavity (16) is formed below the third partition plate (14). The first filter core (30) is arranged between the first partition plate (12) and the second partition plate (13), the second filter core (40) is arranged between the second partition plate (13) and the third partition plate (14), and the flow guide channel (50) is arranged on the second partition plate (13), and the shell wall of the base body (10) is provided with a sandwich layer (102), and the inner cavity of the sandwich layer (102) is provided with a heating element (103). The first partition plate (12) and the third partition plate (14) are respectively provided with a first channel (17) and a second channel (18) corresponding to the oil adsorption layer and the water adsorption layer, the first channel (17) communicates with the oil collecting cavity (15), and the second channel (18) communicates with the water collecting cavity (16). One end of the oil adsorption layer extends into the first channel (17), one end of the water adsorption layer extends into the second channel (18), and the first channel (17) and the second channel (18) are both provided with a support element (19) for supporting the corresponding adsorption layer.

2. The sewage treatment device with deodorization function according to claim 1, characterized in that: The oil adsorption layer is made of polypropylene fiber or glass fiber.

3. The sewage treatment device with deodorization function according to claim 1, characterized in that: The water-blocking and oil-blocking layer (20) is a mesh film made of ePTFE.

4. The sewage treatment device with deodorization function according to claim 1, characterized in that: One side of the base body (10) is communicated with a water inlet pipe (101), and the water inlet pipe (101) is arranged corresponding to the second partition plate (13); one side of the second partition plate (13) corresponding to the water inlet pipe (101) is provided with a notch (131), a filter screen (60) is arranged between the first partition plate (12) and the third partition plate (14), and the filter screen (60) is adapted to the contour of the notch (131).

5. The sewage treatment device with deodorization function according to claim 4, characterized in that: One side of the base body (10) is provided with a sewage discharge pipe (104) at the lower part, and the third partition plate (14) is inclined at the position corresponding to the inlet end of the sewage discharge pipe (104).

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