Sewage pretreatment device

Abstract

The utility model relates to a sewage pretreatment device which is characterized in that a partition piece is arranged in a containing cavity, the partition piece extends in the depth direction of the containing cavity and divides the containing cavity into a treatment cavity and a precipitation cavity, the treatment cavity is used for containing sewage treatment liquid containing decomposition flora, a shell is provided with a liquid inlet communicated with the treatment cavity, and the shell is further provided with a liquid outlet and a bacteria outlet; the liquid outlet and the bacteria outlet are both communicated with the precipitation cavity, and the liquid outlet is used for being communicated with a sewage treatment station; the conveying part is arranged on the partition part and is provided with an input port and an output port which are communicated, the input port is communicated with the treatment cavity, the output port is communicated with the precipitation cavity, and the liquid discharge port, the output port and the bacteria discharge port are arranged at intervals in the depth direction of the precipitation cavity. Compared with the prior art, the sewage pretreatment device can precipitate and discharge aged and dead decomposition flora in sewage, prevents the aged and dead decomposition flora from influencing the pretreatment effect of the sewage, and ensures that the sewage treated by the sewage pretreatment device reaches the standard.

Description

Wastewater pretreatment equipment Technical Field

[0001] This application relates to the technical field of wastewater treatment, and in particular to a wastewater pretreatment device. Background Technology

[0002] The tobacco production process generates wastewater such as tobacco stem washing water and some starch wastewater. If this wastewater is directly discharged into the wastewater treatment plant, it will disrupt the homeostasis of the microbial community in the wastewater treatment plant, causing the wastewater treatment plant to be unable to completely digest and metabolize the organic matter in the wastewater, resulting in foam overflow in the aerobic section.

[0003] In traditional technologies, wastewater pretreatment devices are typically used to pretreat wastewater. The wastewater treatment liquid in these devices contains decomposing bacteria that can break down organic matter in the wastewater. However, during the decomposition of organic matter, the number of these bacteria can increase significantly, leading to a large number of aging and dead bacteria within the wastewater pretreatment device. This affects the effectiveness of wastewater pretreatment and results in the wastewater discharged from the pretreatment device failing to meet standards. Summary of the Invention

[0004] Therefore, it is necessary to provide a wastewater pretreatment device to address the problem that aging and dead decomposing bacteria in traditional wastewater pretreatment devices can affect the pretreatment effect of wastewater, resulting in substandard wastewater discharged from the wastewater pretreatment device.

[0005] The technical solution is as follows:

[0006] One embodiment provides a wastewater pretreatment apparatus, comprising:

[0007] A housing having a receiving cavity;

[0008] A partition, disposed within the receiving cavity, extends along the depth direction of the receiving cavity and divides the receiving cavity into a treatment cavity and a sedimentation cavity. The treatment cavity is used to contain wastewater treatment liquid containing decomposing bacteria. The housing is provided with an inlet communicating with the treatment cavity, and the housing is also provided with a drain outlet and a bacteria discharge outlet, both of which communicate with the sedimentation cavity. The drain outlet is used to communicate with a wastewater treatment plant.

[0009] A conveying component is disposed on the partition and has a connected input port and an output port. The input port is connected to the processing chamber, and the output port is connected to the sedimentation chamber. The drain port, the output port, and the bacterial discharge port are spaced apart along the depth direction of the sedimentation chamber.

[0010] In the aforementioned wastewater pretreatment device, the front-end equipment transports untreated wastewater into the treatment chamber through the inlet. The wastewater in the treatment chamber contains decomposing bacteria, which can fully react with the large organic molecules in the wastewater to decompose them into smaller organic molecules. During this process, the number of decomposing bacteria increases significantly, resulting in a large number of aged and dead decomposing bacteria in the treated wastewater. The treated wastewater enters the conveying unit through the inlet and is then transported to the sedimentation chamber through the outlet. Since the drain outlet, outlet, and bacteria outlet are spaced along the depth of the sedimentation chamber, when the dead decomposing bacteria in the wastewater settle and form sludge in the sedimentation chamber, the bacteria outlet located below the outlet can discharge the sludge, while the drain outlet located above the outlet can discharge the supernatant obtained after wastewater sedimentation to the wastewater treatment station for further treatment. Compared with traditional technologies, the aforementioned wastewater pretreatment device can settle and discharge the aged and dead decomposing bacteria in the wastewater, preventing them from affecting the pretreatment effect and ensuring that the wastewater treated by the wastewater pretreatment device meets the standards.

[0011] In one embodiment, the conveying component includes a guide tube and a conveying pipe, the guide tube being connected to the conveying pipe, the guide tube being disposed in the sedimentation chamber and having the output port, and the conveying pipe being disposed in the partition and having the input port.

[0012] In one embodiment, the conveying member further includes a baffle plate, which is spaced apart from the output port along the axial direction of the guide tube, with one side of the baffle plate facing the output port.

[0013] In one embodiment, the wastewater pretreatment device further includes an overflow weir, which includes a connecting portion and an overflow portion. The connecting portion is disposed on the side wall of the sedimentation chamber, and the overflow portion is disposed on the connecting portion and extends in a direction away from the bottom wall of the sedimentation chamber. The overflow portion is spaced apart from the side wall of the sedimentation chamber. The overflow portion, the connecting portion, and the side wall of the sedimentation chamber form an overflow trough, which is connected to the discharge port.

[0014] In one embodiment, the connecting part includes a connecting ring, the outer ring wall of which is connected to the side wall of the sedimentation chamber, and the overflow part includes an overflow cylinder, one end of which is connected to the inner ring wall of the connecting ring, and the other end of which extends away from the bottom wall of the sedimentation chamber.

[0015] In one embodiment, the wastewater pretreatment device further includes a return pipe and a discharge pipe. One end of the return pipe is connected to the bacterial discharge port, and the other end of the return pipe is connected to the treatment chamber. One end of the discharge pipe is connected to the bacterial discharge port, and the other end of the discharge pipe is used to connect to the sludge storage mechanism.

[0016] In one embodiment, the wastewater pretreatment device further includes a main discharge pipe, one end of which is connected to the discharge port; the end of the return pipe away from the treatment chamber is connected to the end of the main discharge pipe away from the discharge port; and the end of the sewage discharge pipe away from the sludge storage mechanism is connected to the end of the main discharge pipe away from the discharge port. The wastewater pretreatment device further includes a sludge pump, a first flow control valve, and a second flow control valve. The sludge pump is located on the main discharge pipe, the first flow control valve is located on the return pipe, and the second flow control valve is located on the sewage discharge pipe.

[0017] In one embodiment, the wastewater pretreatment device further includes a sludge hopper, which is located at the bottom of the sedimentation chamber and has a sedimentation port and a sedimentation channel that are connected together. The sedimentation port is oriented toward the outlet, and the cross-sectional area of ​​the sedimentation channel gradually decreases along the depth direction of the sedimentation chamber. The bacteria discharge port is connected to the end of the sedimentation channel away from the sedimentation port.

[0018] In one embodiment, the wastewater pretreatment device further includes a stirring element movably disposed within the treatment chamber.

[0019] In one embodiment, the wastewater pretreatment device further includes an inlet pipe disposed within the treatment chamber, one end of which is connected to the inlet port, and the other end of which extends to the bottom of the treatment chamber and is connected to the treatment chamber. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the overall structure of a wastewater pretreatment device in one embodiment of this application.

[0022] Figure 2 is a magnified view of part A in Figure 1.

[0023] Attached image annotations:

[0024] 100. Shell; 110. Receiving cavity; 111. Processing cavity; 112. Sedimentation cavity; 120. Liquid inlet; 130. Liquid outlet; 140. Bacterial discharge outlet; 200. Partition; 300. Conveying component; 310. Conveying pipe; 311. Input port; 320. Flow guide tube; 321. Output port; 330. Baffle plate; 400. Overflow weir; 410. Connecting part; 420. Overflow part; 430. Overflow trough; 510. Return pipe; 511. First flow control valve; 520. Sewage pipe; 521. Second flow control valve; 530. Main bacterial discharge pipe; 531. Sludge pump; 600. Sludge hopper; 610. Sedimentation port; 620. Sedimentation channel; 700. Stirring component; 800. Liquid inlet pipe; 900. Sludge storage mechanism. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

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

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] Please refer to Figures 1 and 2. One embodiment of this application provides a wastewater pretreatment device, including a housing 100, a partition 200, and a conveying member 300. The housing 100 has a receiving cavity 110. The partition 200 is disposed within the receiving cavity 110 and extends along the depth direction of the receiving cavity 110, dividing the receiving cavity 110 into a treatment cavity 111 and a sedimentation cavity 112. The treatment cavity 111 is used to contain wastewater treatment liquid containing decomposing bacteria. The housing 100 has an inlet that communicates with the treatment cavity 111. The housing 100 is also provided with a drain port 130 and a bacteria discharge port 140. Both the drain port 130 and the bacteria discharge port 140 are connected to the sedimentation chamber 112. The drain port 130 is used to connect to the sewage treatment plant. The conveying component 300 is provided on the partition 200 and has a connected input port 311 and an output port 321. The input port 311 is connected to the treatment chamber 111, and the output port 321 is connected to the sedimentation chamber 112. The drain port 130, the output port 321 and the bacteria discharge port 140 are arranged at intervals along the depth direction of the sedimentation chamber 112.

[0032] In the aforementioned wastewater pretreatment device, the front-end equipment transports untreated wastewater through inlet 120 into treatment chamber 111. The wastewater in treatment chamber 111 contains decomposing bacteria, which can react fully with large organic molecules in the wastewater to break them down into smaller organic molecules. During this process, the number of decomposing bacteria increases significantly, resulting in a large number of aged and dead decomposing bacteria in the treated wastewater. The treated wastewater then enters conveying unit 300 through inlet 311 and is transported to sedimentation chamber 112 through outlet 321. Because outlet 130 and outlet 321... The discharge ports 140 are spaced along the depth of the sedimentation chamber 112. When the dead decomposing bacteria in the sewage settle and form sludge in the sedimentation chamber 112, the discharge ports 140 located below the outlet 321 can discharge the sludge, while the discharge ports 130 located above the outlet 321 can discharge the supernatant obtained after sewage sedimentation to the sewage treatment plant for further treatment. Compared with traditional technology, the above-mentioned sewage pretreatment device can settle and discharge the aged and dead decomposing bacteria in the sewage, preventing the aged and dead decomposing bacteria from affecting the pretreatment effect of the sewage and ensuring that the sewage treated by the sewage pretreatment device meets the standards.

[0033] For explanation, the depth direction of the receiving cavity 110 is direction B in Figure 1, that is, the direction perpendicular to the ground; understandably, the depth direction of the processing cavity 111 and the depth direction of the sedimentation cavity 112 are also direction B in Figure 1, which will not be elaborated here.

[0034] Furthermore, the drain port 130, the output port 321, and the bacteria discharge port 140 are spaced apart along the depth direction of the sedimentation chamber 112, such that the output port 321 of the conveying component 300 is located between the drain port 130 and the bacteria discharge port 140. In this way, when the treated wastewater enters the sedimentation chamber 112 from the treatment chamber 111 through the output port 321, the drain port 130, being located above the output port 321, can to some extent prevent the aging and dead decomposition bacteria from entering the downstream wastewater treatment station through the drain port 130. When the aging and dead decomposition bacteria settle in the treatment chamber 111 to form sludge, the bacteria discharge port 140, located below the output port 321, can discharge the sludge more efficiently, preventing the sludge from accumulating too much in the sedimentation chamber 112 and entering the downstream wastewater treatment station through the drain port 130.

[0035] Optionally, the discharge port 140 can be set on the side wall of the sedimentation chamber 112 and close to the bottom wall of the sedimentation chamber 112, or it can be set directly on the bottom wall of the sedimentation chamber 112. No specific limitation is made here.

[0036] Furthermore, the decomposing bacteria are facultative anaerobic bacteria, which are domesticated in the wastewater of treatment chamber 111 by controlling the pretreatment conditions.

[0037] For example, the decomposing bacteria in the treatment chamber 111 include, but are not limited to, Clostridium and methanococcus. The composition of the decomposing bacteria can refer to the facultative anaerobic bacteria used in the prior art to decompose macromolecular organic matter in sewage, which will not be elaborated here.

[0038] Referring to FIG1, in one embodiment, the partition 200 includes a partition extending along the depth direction of the receiving cavity 110 (i.e., direction B in FIG1) to divide the receiving cavity 110 into a processing cavity 111 and a sedimentation cavity 112.

[0039] Please refer to Figure 2. In one embodiment, the conveying member 300 includes a guide tube 320 and a conveying pipe 310. The conveying pipe 310 is connected to the guide tube 320. The guide tube 320 is located in the sedimentation chamber 112 and has an output port 321. The conveying pipe 310 is located in the partition member 200 and has an input port 311.

[0040] After being treated by the wastewater treatment liquid, the wastewater enters the conveying pipe 310 through the inlet 311 and is then conveyed to the sedimentation chamber 112 through the outlet 321 of the guide tube 320. The conveying process is reliable and has low implementation cost.

[0041] Furthermore, the conveying pipe 310 passes through the partition 200 and communicates with the guide tube 320 in the sedimentation chamber 112 to realize the communication between the processing chamber 111 and the sedimentation chamber 112.

[0042] Please refer to Figure 2. In one embodiment, one end of the guide tube 320 is provided with an output port 321, which is disposed towards the bottom wall of the sedimentation chamber 112. The end of the guide tube 320 away from the output port 321 is disposed on the top wall of the sedimentation chamber 112. The end of the conveying pipe 310 away from the input port 311 is connected to the side wall of the guide tube 320.

[0043] Referring to Figure 2, in one embodiment, the conveyor 300 further includes a baffle 330, which is spaced apart from the output port 321 along the axial direction of the guide tube 320, with one side of the baffle 330 facing the output port 321.

[0044] With this configuration, the sewage flowing out of the outlet 321 can be blocked by the baffle plate 330, allowing the sewage to flow out through the gap between the baffle plate 330 and the outlet 321, and then out through the outer periphery of the baffle plate 330, ensuring the uniformity of the sewage when entering the sedimentation chamber 112 and improving the sedimentation efficiency of the aged and dead decomposing bacteria in the sewage in the sedimentation chamber 112.

[0045] In one embodiment, the conveying member 300 further includes a fixing part, which is disposed on the guide tube 320 and connected to the baffle plate 330 to fix the baffle plate 330.

[0046] Optionally, the end of the fixing part away from the baffle 330 can be set at the cross-section where the outlet 321 of the guide tube 320 is located, or it can be set on the outer wall of the guide tube 320, as long as the baffle 330 can be fixed on the guide tube 320, no specific limitation is made here.

[0047] Understandably, in other embodiments, the fixing part may also be provided on the side wall or bottom wall of the sedimentation chamber 112, one side of the baffle plate 330 is provided on the fixing part, and the other side of the baffle plate 330 is provided facing the outlet 321, so that the baffle plate 330 can block the sewage to a certain extent and improve the uniformity of the sewage when entering the sedimentation chamber 112.

[0048] Referring to Figure 2, in one embodiment, the wastewater pretreatment device further includes an overflow weir 400. The overflow weir 400 includes a connecting portion 410 and an overflow portion 420. The connecting portion 410 is disposed on the side wall of the sedimentation chamber 112, and the overflow portion 420 is disposed on the connecting portion 410 and extends in a direction away from the bottom wall of the sedimentation chamber 112. The overflow portion 420 is spaced apart from the side wall of the sedimentation chamber 112. The overflow portion 420, the connecting portion 410, and the side wall of the sedimentation chamber 112 form an overflow trough 430, which is connected to the drain outlet 130.

[0049] After sedimentation, the supernatant of the sewage in the sedimentation chamber 112 can enter the overflow tank 430 through the overflow section 420. The supernatant in the overflow tank 430 is then discharged to the sewage treatment plant through the drain port 130. The overflow weir 400 not only prevents the sewage level in the sedimentation chamber 112 from being too high and overflowing from the sedimentation chamber 112, but also separates the supernatant of the sewage and discharges it to the sewage treatment plant. The implementation cost is low.

[0050] Referring to Figure 2, in one embodiment, the connecting part 410 includes a connecting ring, the outer ring wall of which is connected to the side wall of the sedimentation chamber 112, and the overflow part 420 includes an overflow cylinder, one end of which is connected to the inner ring wall of the connecting ring, and the other end of which extends in a direction away from the bottom wall of the sedimentation chamber 112.

[0051] The overflow cylinder, connecting ring, and sidewalls of sedimentation chamber 112 can form an annular overflow trough 430. The supernatant after sedimentation can overflow from the end of the overflow cylinder away from the connecting ring into the overflow trough 430. The supernatant in the overflow trough 430 is then discharged to the sewage treatment plant through the drain port 130. This arrangement can increase the volume of supernatant that the overflow trough 430 can hold and ensure that the sewage in sedimentation chamber 112 overflows from the sedimentation chamber 112 due to excessive water level.

[0052] Referring to Figure 1, in one embodiment, the wastewater pretreatment device further includes a return pipe 510 and a discharge pipe 520. One end of the return pipe 510 is connected to the discharge port 140, and the other end of the return pipe 510 is connected to the treatment chamber 111. One end of the discharge pipe 520 is connected to the discharge port 140, and the other end of the discharge pipe 520 is used to connect to the sludge storage mechanism 900.

[0053] During the sewage transport process, the conveying unit 300 not only transports the aged and dead decomposing bacteria along with the sewage to the sedimentation chamber 112, but also transports the highly active decomposing bacteria to the sedimentation chamber 112. That is, the sewage in the sedimentation chamber 112 contains both aged and dead decomposing bacteria and highly active decomposing bacteria. The sewage discharge pipe 520 transports the aged and dead decomposing bacteria to the sludge storage unit 900, while the return pipe 510 can transport the highly active decomposing bacteria back to the treatment chamber 111 for reuse, thereby reducing costs.

[0054] Furthermore, under normal circumstances, aged and dead decomposing bacteria are generally heavier, while highly active decomposing bacteria are generally lighter. Therefore, in the wastewater within the sedimentation chamber 112, aged and dead decomposing bacteria settle to the bottom wall of the sedimentation chamber 112 before highly active decomposing bacteria, causing highly active decomposing bacteria to settle above the aged and dead decomposing bacteria. Based on this phenomenon, when transporting the settled decomposing bacteria through the discharge pipe, the aged and dead decomposing bacteria are first discharged to the sludge storage mechanism 900 through the discharge pipe 520. After discharge, the highly active decomposing bacteria are then transported back to the treatment chamber 111 through the return pipe 510, thereby enabling the reuse of highly active decomposing bacteria and reducing costs.

[0055] Referring to Figure 1, in one embodiment, the wastewater pretreatment device further includes a main discharge pipe 530, one end of which is connected to a discharge port 140. The end of a return pipe 510 away from the treatment chamber 111 is connected to the end of the main discharge pipe 530 away from the discharge port 140. The end of a sewage discharge pipe 520 away from the sludge storage mechanism 900 is connected to the end of the main discharge pipe 530 away from the discharge port 140. The wastewater pretreatment device also includes a sludge pump 531, a first flow control valve 511, and a second flow control valve 521. The sludge pump 531 is located in the main discharge pipe 530, the first flow control valve 511 is located in the return pipe 510, and the second flow control valve 521 is located in the sewage discharge pipe 520.

[0056] The decomposing bacteria will settle in the sedimentation chamber 112 to form sludge. The sludge pump 531 can provide power for the flow of sludge in the main discharge pipe 530, the sewage discharge pipe 520, and the return pipe 510. When it is necessary to discharge the aged and dead decomposing bacteria to the sludge storage mechanism 900 through the sewage discharge pipe 520, the first flow control valve 511 is closed and the second flow control valve 521 is opened to realize the conduction of the sewage discharge pipe 520. When it is necessary to transport the well-active decomposing bacteria back to the treatment chamber 111 through the return pipe 510, the first flow valve is opened and the second flow valve is closed to realize the conduction of the return pipe 510. This setting has low implementation cost and reliable sludge transportation effect.

[0057] Furthermore, the first flow control valve 511 and the second flow control valve 521 can be electrically operated valves or manually operated valves, etc., without specific limitations here.

[0058] Referring to Figure 1, in one embodiment, the wastewater pretreatment device further includes a sludge hopper 600, which is located at the bottom of the sedimentation chamber 112 and has a sedimentation port 610 and a sedimentation channel 620 that are connected. The sedimentation port 610 is positioned towards the outlet 321. The cross-sectional area of ​​the sedimentation channel 620 gradually decreases along the depth direction of the sedimentation chamber 112. The bacteria discharge port 140 is connected to the end of the sedimentation channel 620 away from the sedimentation port 610.

[0059] The cross-sectional area of ​​the sedimentation channel 620 gradually decreases along the depth direction of the sedimentation chamber 112, making the approximate shape of the sedimentation channel 620 an inverted truncated cone. As a result, the decomposing bacteria in the wastewater will settle along the inner wall of the sedimentation channel 620 to the side of the sedimentation channel 620 away from the sedimentation port 610 when they fall, ensuring that the decomposing bacteria in the wastewater can gather on the side of the sedimentation channel 620 away from the sedimentation port 610 during sedimentation, thereby improving the sedimentation efficiency of the decomposing bacteria.

[0060] Furthermore, the sidewall of the sedimentation channel 620 forms an angle with the bottom wall of the sedimentation chamber 112.

[0061] Preferably, the sidewall of the sedimentation channel 620 forms an angle of 65° with the sedimentation chamber 112.

[0062] Referring to Figure 1, in one embodiment, the wastewater pretreatment device further includes a stirrer 700, which is movably disposed within the treatment chamber 111.

[0063] The agitator 700 can fully mix the sewage entering from the inlet 120 with the sewage treatment liquid containing decomposing bacteria, ensuring the decomposition effect of the decomposing bacteria on the large molecular organic matter in the sewage and preventing the formation of local dead zones in the treatment chamber 111.

[0064] In one embodiment, the agitator 700 includes a rotating part and at least two blades. The rotating part is rotatably disposed in the treatment chamber 111, and the at least two blades are spaced apart on the rotating part around the rotation axis of the rotating part. The rotating part can drive the blades to rotate, thereby fully mixing the sewage and the sewage treatment liquid containing decomposing bacteria.

[0065] Furthermore, the agitator 700 is provided with at least two.

[0066] Furthermore, an even number of agitators 700 are provided, and the even number of agitators 700 are symmetrically and spaced apart in the processing chamber 111 to ensure the mixing effect and prevent the formation of local dead corners in the processing chamber 111.

[0067] In one embodiment, the stirring component 700 is a stirring component 700 with constant power, constant speed, and constant blade diameter, that is, the power of the rotating part is constant, the speed is constant, and the diameter of the blade is constant.

[0068] Please refer to Figure 1. In one embodiment, the wastewater pretreatment device further includes an inlet pipe 800, which is disposed in the treatment chamber 111. One end of the inlet pipe 800 is connected to the inlet port 120, and the other end of the inlet pipe 800 extends to the bottom of the treatment chamber 111 and is connected to the treatment chamber 111.

[0069] The inlet pipe 800 can lead the sewage from the inlet 120 to the bottom of the treatment chamber 111 to ensure that the sewage can fully react with the sewage treatment liquid located at the bottom of the treatment chamber 111.

[0070] Furthermore, the end of the inlet pipe 800 away from the inlet port 120 is provided with an outlet. The axial direction of the outlet is parallel to the plane where the bottom wall of the treatment chamber 111 is located, so as to ensure that the sewage entering the treatment chamber 111 can flow parallel to the bottom wall of the treatment chamber 111, thereby ensuring that the sewage can fully react with the sewage treatment liquid located at the bottom of the treatment chamber 111.

[0071] In one embodiment, at least three liquid outlets are provided and spaced apart in the axial direction around the liquid inlet pipe 800.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A wastewater pretreatment device, characterized in that, include: The system comprises: a housing having a receiving cavity; a partition member disposed within the receiving cavity, extending along the depth direction of the receiving cavity and dividing the receiving cavity into a treatment cavity and a sedimentation cavity, the treatment cavity being used to contain wastewater treatment liquid containing decomposing bacteria; the housing having an inlet communicating with the treatment cavity; the housing also having an outlet and a discharge port, both communicating with the sedimentation cavity; the outlet being used to communicate with a wastewater treatment plant; and a conveying member disposed within the partition member and having a connected input port and an output port, the input port communicating with the treatment cavity; the output port communicating with the sedimentation cavity; and the outlet, output port, and discharge port being spaced apart along the depth direction of the sedimentation cavity.

2. The wastewater pretreatment device according to claim 1, characterized in that, The conveying component includes a guide tube and a conveying pipe. The guide tube is connected to the conveying pipe. The guide tube is located in the sedimentation chamber and has the output port. The conveying pipe is located in the partition and has the input port.

3. The wastewater pretreatment device according to claim 2, characterized in that, The conveying component also includes a baffle plate, which is spaced apart from the output port along the axial direction of the guide tube, with one side of the baffle plate facing the output port.

4. The wastewater pretreatment device according to claim 1, characterized in that, The wastewater pretreatment device further includes an overflow weir, which includes a connecting part and an overflow part. The connecting part is located on the side wall of the sedimentation chamber, and the overflow part is located on the connecting part and extends in a direction away from the bottom wall of the sedimentation chamber. The overflow part is spaced apart from the side wall of the sedimentation chamber. The overflow part, the connecting part, and the side wall of the sedimentation chamber form an overflow trough, which is connected to the discharge port.

5. The wastewater pretreatment device according to claim 4, characterized in that, The connecting part includes a connecting ring, the outer ring wall of which is connected to the side wall of the sedimentation chamber. The overflow part includes an overflow cylinder, one end of which is connected to the inner ring wall of the connecting ring, and the other end of which extends away from the bottom wall of the sedimentation chamber.

6. The wastewater pretreatment device according to claim 1, characterized in that, The wastewater pretreatment device further includes a return pipe and a discharge pipe. One end of the return pipe is connected to the bacteria discharge port, and the other end of the return pipe is connected to the treatment chamber. One end of the discharge pipe is connected to the bacteria discharge port, and the other end of the discharge pipe is used to connect to the sludge storage mechanism.

7. The wastewater pretreatment device according to claim 6, characterized in that, The wastewater pretreatment device further includes a main discharge pipe, one end of which is connected to the discharge port. The end of the return pipe away from the treatment chamber is connected to the end of the main discharge pipe away from the discharge port. The end of the sewage discharge pipe away from the sludge storage mechanism is connected to the end of the main discharge pipe away from the discharge port. The wastewater pretreatment device further includes a sludge pump, a first flow control valve, and a second flow control valve. The sludge pump is located on the main discharge pipe, the first flow control valve is located on the return pipe, and the second flow control valve is located on the sewage discharge pipe.

8. The wastewater pretreatment device according to claim 1, characterized in that, The wastewater pretreatment device also includes a sludge hopper, which is located at the bottom of the sedimentation chamber and has a sedimentation port and a sedimentation channel that are connected together. The sedimentation port is oriented towards the outlet. The cross-sectional area of ​​the sedimentation channel gradually decreases along the depth direction of the sedimentation chamber. The bacteria discharge port is connected to the end of the sedimentation channel away from the sedimentation port.

9. The wastewater pretreatment device according to claim 1, characterized in that, The wastewater pretreatment device also includes a stirring element, which is movably disposed within the treatment chamber.

10. The wastewater pretreatment device according to claim 1, characterized in that, The wastewater pretreatment device also includes an inlet pipe, which is located inside the treatment chamber. One end of the inlet pipe is connected to the inlet port, and the other end of the inlet pipe extends to the bottom of the treatment chamber and is connected to the treatment chamber.

Images