Three-phase separator and anaerobic treatment system

Abstract

The utility model discloses a three-phase separator which comprises an overflow weir comprising a water inlet and a water outlet which are communicated with each other; the baffle and the outer side wall of the overflow weir are arranged at intervals, so that a water inlet channel is defined between the baffle and the outer side wall of the overflow weir, and the water inlet channel is communicated with the water inlet of the overflow weir. The baffle can block sludge, and the sludge is prevented from entering the overflow weir and blocking the water outlet of the overflow weir. The utility model also provides an anaerobic treatment system.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, and particularly to a three-phase separator and an anaerobic treatment system. Background Art

[0002] UASB (Upflow Anaerobic Sludge Bed) is an efficient wastewater treatment technology that uses the anaerobic action of microorganisms to remove organic substances in sewage. UASB consists of a sludge reaction zone, a gas-liquid-solid three-phase separator (including a sedimentation zone), and a gas chamber. The overflow weir is an important part of the three-phase separator. Sewage enters the bottom sludge layer and the middle-upper sludge suspension layer in sequence through the water distribution device. The gas-liquid-solid mixture is separated by the upper three-phase separator. The sludge falls back to the sludge suspension area, the separated sewage is discharged from the system, and the generated biogas is recovered at the same time. The overflow weir plays the role of separating the effluent. Because all three phases of gas, liquid, and solid exist in the three-phase separator, the effluent often mixes with a small amount of anaerobic sludge. Serious sludge accumulation occurs at the bottom of the conventional overflow weir, and the phenomenon of sludge blocking the water outlet often occurs soon after the project operates, resulting in insufficient effluent water volume and the subsequent process cannot operate normally. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the problem that sewage carries sludge into the overflow weir, the sludge blocks the water outlet of the overflow weir, resulting in insufficient effluent water volume and the subsequent process cannot operate normally. The utility model provides a three-phase separator and an anaerobic treatment system, which can block the sludge and prevent it from entering the overflow weir and blocking the water outlet of the overflow weir.

[0004] To solve the above technical problems, an embodiment of the utility model discloses a three-phase separator, including:

[0005] An overflow weir, including a water inlet and a water outlet that are connected and communicated;

[0006] A baffle, which is arranged at an interval from the outer side wall of the overflow weir to define a water inlet channel between the baffle and the outer side wall of the overflow weir, and the water inlet channel is communicated with the water inlet of the overflow weir.

[0007] Adopting the above technical solution, when the sewage that has completed preliminary solid-liquid separation carries a small part of the sludge that has not been completely separated and flows towards the overflow weir, it passes through the baffle in front of the overflow weir. The baffle blocks the sludge, and the separated sewage flows through the water inlet channel to the water inlet of the overflow weir and is finally discharged through the water outlet of the overflow weir, thereby further realizing solid-liquid separation.

[0008] That is, on the basis that the three-phase separator itself can achieve solid-liquid separation, this solution further performs solid-liquid separation through the baffle, blocks the sludge flowing towards the overflow weir outside, and prevents it from entering the overflow weir and blocking the water outlet of the overflow weir.

[0009] According to another specific embodiment of the present utility model, the top of the baffle is used for fixedly connecting with the top wall of the inner cavity of the anaerobic tank, and two side portions of the baffle in the first direction are used for respectively fixedly connecting with the side walls of the inner cavity of the anaerobic tank.

[0010] Adopting the above technical solution, the baffle is fixedly arranged in the inner cavity of the anaerobic tank, so as to ensure the relative fixation of the position of the baffle, and avoid its shaking in the inner cavity of the anaerobic tank, which affects the blocking effect on the sludge.

[0011] According to another specific embodiment of the present utility model, in the height direction, the bottom of the baffle is higher than the lowest point of the overflow weir and lower than the highest point of the overflow weir; the height direction is perpendicular to the first direction.

[0012] Adopting the above technical solution, the bottom of the baffle is higher than the lowest point of the overflow weir and lower than the highest point of the overflow weir, so as to ensure a good sludge blocking effect while avoiding affecting the water discharge amount of the overflow weir due to the overlong extension of the baffle.

[0013] According to another specific embodiment of the present utility model, the three-phase separator includes two said baffles, the two said baffles are respectively located on both sides of the second direction of the overflow weir, and each said baffle and the outer side wall of the overflow weir adjacent thereto define the water inlet channel; the first direction is perpendicular to the second direction.

[0014] Adopting the above technical solution, baffles are arranged on both sides of the second direction of the water inlet of the overflow weir to block the sludge flowing from both sides of the second direction of the overflow weir to the water inlet of the overflow weir, so as to minimize the sludge flowing into the overflow weir as much as possible.

[0015] According to another specific embodiment of the present utility model, it further includes:

[0016] A gas-liquid separation cover, including two cover plates, the two cover plates are arranged at intervals in the second direction, and both the two cover plates are used for connecting with the cavity wall of the inner cavity of the anaerobic tank to define an accommodation space between the two cover plates, and the overflow weir and the baffle are arranged in the accommodation space;

[0017] Two connecting plates, corresponding to and connected with the bottoms of the two cover plates one by one, and each said connecting plate forms an obtuse angle with the corresponding said cover plate;

[0018] Two flow guiding plates, corresponding to the two connecting plates one by one, each said flow guiding plate is parallel and spaced from the corresponding said connecting plate to define a flow channel between the flow guiding plate and the connecting plate;

[0019] The air seal is located below the deflector plate. The air seal and the deflector plate are spaced apart to form a return gap therebetween, and the return gap communicates with the flow channel.

[0020] With the above technical solution, the three-phase mixture of mud, gas and water flows downward in the flow channel between the deflector plate and the connecting plate. Most of the sludge in the three-phase mixture of mud, gas and water settles due to its own gravity and is discharged from the return gap between the air seal and the deflector plate. The remaining small part of the sludge that is not carried away by gravity passes through the baffle in front of the overflow weir during the flow to the overflow weir. The baffle blocks the sludge, and the separated sewage flows through the water inlet channel to the water inlet of the overflow weir and is finally discharged through the water outlet of the overflow weir, thereby further completing the solid-liquid separation.

[0021] An embodiment of the present invention also discloses an anaerobic treatment system based on the above three-phase separator, including:

[0022] An anaerobic tank, including an inner cavity;

[0023] The three-phase separator in any of the above embodiments, and the three-phase separator is installed in the inner cavity of the anaerobic tank. Description of the Drawings

[0024] Figure 1 A schematic diagram showing the anaerobic treatment system of the embodiment of the present invention;

[0025] Figure 2 Showing Figure 1 A partial enlarged view of area A;

[0026] Figure 3 Showing Figure 1 The top view. Detailed Embodiments

[0027] The following specific embodiments illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0028] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the utility model.

[0030] The terms "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0032] To make the purpose, technical solutions and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the drawings.

[0033] Refer to Figures 1 to 3 , an anaerobic treatment system 1 is provided in an embodiment of the present application, including a three-phase separator 2 and an anaerobic tank 3. Among them, the anaerobic tank 3 includes an inner cavity 30, the three-phase separator 2 is installed in the inner cavity 30, the inner cavity 30 is provided with a sewage inlet 31, and the sewage inlet 31 allows the three-phase mixture of mud, gas and water to enter the inner cavity 30, where separation is carried out and finally they are discharged respectively. In this embodiment, two three-phase separators 2 are installed in the inner cavity 30 of the anaerobic tank 3.

[0034] The above-mentioned three-phase separator 2 includes a gas-liquid separation cover 20, a connecting plate 21, a guide plate 22, a gas seal 23, an overflow weir 24 and a baffle 25; among them, the gas-liquid separation cover 20 includes two cover plates 200, the two cover plates 200 are arranged at intervals along the second direction X, and both of the two cover plates 200 are fixedly connected to the cavity wall of the inner cavity 30 of the anaerobic tank 3 to define an accommodation space 210 between the two cover plates 200.

[0035] Exemplarily, as Figure 2 and Figure 3As shown, the top 201 of the cover plate 200 is fixedly connected to the top wall 300 of the inner cavity 30 of the anaerobic tank 3, and the two side walls 202 of the cover plate 200 in the first direction Y are fixedly connected to the side wall 301 of the inner cavity 30 of the anaerobic tank 3. In this embodiment, the anaerobic tank 3 is made of carbon steel, and the cover plate 200 and the inner cavity 30 of the anaerobic tank 3 are fixedly connected by steel frame welding. However, those skilled in the art can understand that in other embodiments, the cover plate 200 and the inner cavity 30 of the anaerobic tank 3 can be connected by other means. For example, the anaerobic tank 3 and the cover plate 200 made of steel concrete can be fixedly connected by concrete casting.

[0036] As Figure 2 shown, this embodiment is provided with two such connecting plates 21. The two connecting plates 21 are in one-to-one correspondence with and connected to the bottoms of the two cover plates 200, and each connecting plate 21 forms an obtuse angle with its corresponding cover plate 200. That is, the two connecting plates 21 enclose a trapezoidal area, and this area is communicated with the accommodation space 210.

[0037] Exemplarily, the included angle formed by the connecting plate 21 and the cover plate 200 is 135° - 150°. In this embodiment, the included angle formed by the connecting plate 21 and the cover plate 200 is set to 150°. However, in other embodiments, the specific degree of the included angle formed by the connecting plate 21 and the cover plate 200 can also be adjusted, such as 135°, 140°, 145°, etc.

[0038] Correspondingly, this embodiment is provided with two such flow guiding plates 22. The two flow guiding plates 22 are in one-to-one correspondence with the two connecting plates 21. Each flow guiding plate 22 is parallel and spaced from its corresponding connecting plate 21, so as to form a flow channel 203 between the flow guiding plate 22 and the connecting plate 21.

[0039] The above-mentioned air seal 23 is located below the flow guiding plate 22, and the air seal 23 is spaced from the flow guiding plate 22 to form a return seam 204 between the air seal 23 and the flow guiding plate 22. The return seam 204 is communicated with the flow channel 203 between the flow guiding plate 22 and the connecting plate 21.

[0040] The above-mentioned overflow weir 24 is located in the accommodation space 210 defined between the two cover plates 200. The overflow weir 24 includes a water inlet 241 and a water outlet 242 that are connected. The water inlet 241 of the overflow weir 24 allows the sewage that has completed preliminary solid-liquid separation in the inner cavity 30 to enter the overflow weir 24 and be discharged through the water outlet 242.

[0041] The above-mentioned baffle 25 is also located in the accommodation space 210 defined between the two cover plates 200. The baffle 25 is spaced from the outer side wall of the overflow weir 24 in the second direction X to define a water inlet channel 243 between the baffle 25 and the outer side wall of the overflow weir 24. The water inlet channel 243 is communicated with the water inlet 241 of the overflow weir 24.

[0042] Exemplarily, the spacing distance between the baffle 25 and the outer sidewall of the overflow weir 24 in the second direction X can be determined according to the required flow rate and flow velocity to ensure the water outlet effect.

[0043] Adopting the above technical solution, the three-phase mixture of mud, gas and water entering the inner cavity 30 from the sewage inlet 31 flows from top to bottom in the flow channel 203 between the flow guide plate 22 and the connecting plate 21. Most of the sludge in the three-phase mixture of mud, gas and water settles due to its own gravity and is discharged from the return slit 204 between the air seal 23 and the flow guide plate 22. A small part of the sludge that is not carried away by gravity, during the process of flowing towards the overflow weir 24, passes through the baffle 25 in front of the overflow weir 24. The baffle 25 blocks the sludge outside, thereby further completing the solid-liquid separation. The separated sewage flows through the water inlet channel 243 to the water inlet 241 of the overflow weir 24 and is finally discharged through the water outlet 242 of the overflow weir 24.

[0044] That is, on the basis that the three-phase separator 2 itself can achieve solid-liquid separation, the solid-liquid separation is further carried out through the baffle 25, and the sludge flowing towards the overflow weir 24 is blocked outside to prevent it from entering the overflow weir 24 and blocking the water outlet 242 of the overflow weir 24.

[0045] In some possible implementation manners, the top 250 of the baffle 25 is fixedly connected to the top wall 300 of the inner cavity 30 of the anaerobic tank 3, and the two side portions 252 of the baffle 25 in the first direction Y are respectively fixedly connected to the side wall 301 of the inner cavity 30 of the anaerobic tank 3. Exemplarily, the baffle 25 is arranged in parallel with the cover plate 200. The baffle 25 is fixedly arranged in the inner cavity 30 of the anaerobic tank 3, so as to ensure the relative fixation of the position of the baffle 25 and prevent it from shaking in the inner cavity 30 of the anaerobic tank 3, which affects the blocking effect on the sludge.

[0046] In some possible implementation manners, the three-phase separator 2 includes two baffles 25. The two baffles 25 are respectively located on both sides of the overflow weir 24 in the second direction X. Each baffle 25 and the outer sidewall of the corresponding overflow weir 24 define a water inlet channel 243; the first direction Y is perpendicular to the second direction X. Exemplarily, baffles 25 are arranged on both sides of the water inlet 241 of the overflow weir 24 in the second direction X to block the sludge flowing towards the water inlet 241 of the overflow weir 24 from both sides of the second direction X of the overflow weir 24, so as to minimize the sludge flowing into the overflow weir 24.

[0047] In some possible embodiments, in the height direction Z, the bottom 251 of the baffle 25 is higher than the lowest point N of the overflow weir 24 and lower than the highest point M of the overflow weir 24; the height direction Z is perpendicular to the first direction Y. In this embodiment, the bottom 251 of the baffle 25 is directly opposite to the middle position between the highest point M and the lowest point N of the overflow weir 24, so as to ensure a good sludge blocking effect while avoiding affecting the water discharge of the overflow weir 24 due to the overlong extension of the baffle 25. However, those skilled in the art can understand that in other embodiments, the extension length of the baffle 25 can be adjusted accordingly according to the actual use effect.

[0048] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A three-phase separator, characterized in that, Comprising: An overflow weir, including a water inlet and a water outlet that are connected and communicate with each other; A baffle plate, which is arranged at an interval from the outer side wall of the overflow weir to define a water inlet channel between the baffle plate and the outer side wall of the overflow weir, and the water inlet channel communicates with the water inlet of the overflow weir.

2. The three-phase separator according to claim 1, characterized in that, The top of the baffle plate is used for fixedly connecting with the top wall of the inner cavity of the anaerobic tank, and the two side parts of the baffle plate in the first direction are used for respectively fixedly connecting with the side walls of the inner cavity of the anaerobic tank.

3. The three-phase separator according to claim 2, wherein, In the height direction, the bottom of the baffle plate is higher than the lowest point of the overflow weir and lower than the highest point of the overflow weir; the height direction is perpendicular to the first direction.

4. The three-phase separator according to claim 3, characterized in that, The three-phase separator includes two such baffle plates, and the two baffle plates are respectively located on both sides of the overflow weir in the second direction, and each baffle plate and the outer side wall of the adjacent overflow weir define the water inlet channel; the first direction is perpendicular to the second direction.

5. The three-phase separator according to claim 4, wherein Further comprising: A gas-liquid separation cover, including two cover plates, the two cover plates are arranged at an interval in the second direction, and both of the two cover plates are used for connecting with the cavity wall of the inner cavity of the anaerobic tank to define a receiving space between the two cover plates, and the overflow weir and the baffle plate are arranged in the receiving space; Two connecting plates, corresponding to and connected with the bottoms of the two cover plates one by one, and each connecting plate forms an obtuse angle with the corresponding cover plate; Two flow guide plates, corresponding to the two connecting plates one by one, each flow guide plate is parallel and spaced from the corresponding connecting plate to define a flow channel between the flow guide plate and the connecting plate; A gas seal, located below the flow guide plate, and the gas seal is spaced from the flow guide plate to form a reflux seam between the gas seal and the flow guide plate, and the reflux seam communicates with the flow channel.

6. An anaerobic treatment system, characterized in that, Comprising: An anaerobic tank, including an inner cavity; The three-phase separator according to any one of claims 1 to 5, and the three-phase separator is installed in the inner cavity of the anaerobic tank.

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