A wastewater pretreatment device

Abstract

This utility model provides a wastewater pretreatment device, comprising a mounting box. An inlet pipe and a first outlet pipe are fixedly connected to opposite sides of the mounting box. A second outlet pipe is also fixedly connected to the bottom of the mounting box. The inlet and outlet pipes extend into the mounting box, and the second outlet pipe communicates with the interior of the mounting box. A filter pipe is also installed inside the mounting box. The filter pipe has several filter holes on its wall, and its two ends are connected to the ends of the inlet pipe and the first outlet pipe located inside the mounting box, respectively. An on / off valve is installed on the second outlet pipe. This utility model solves the problem in the prior art where wastewater with low solid impurity content requires a long time to form a filter cake, resulting in a large amount of wastewater requiring secondary filtration.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and in particular to a sewage pretreatment device. Background Technology

[0002] In wastewater treatment, especially for wastewater containing solid impurities, filtration is crucial. Plate and frame filters are commonly used to filter wastewater. The wastewater is introduced into the filter, where solid impurities are trapped and gradually form a filter cake. Subsequent filtration improves, eventually leading to stable wastewater filtration. However, in practice, some wastewater contains low levels of solid impurities, requiring a longer time for filter cake formation after introduction. During this initial period, a significant portion of the wastewater is poorly filtered, necessitating a secondary filtration process and reducing overall filtration efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a wastewater pretreatment device that solves the problem that wastewater with low solid impurity content requires a long time to form a filter cake, resulting in a large amount of wastewater needing secondary filtration.

[0004] According to an embodiment of this utility model, a wastewater pretreatment device includes an installation box. An inlet pipe and a first outlet pipe are fixedly connected to opposite sides of the installation box, and a second outlet pipe is fixedly connected to the bottom of the installation box. The inlet pipe and the outlet pipe extend into the installation box, and the second outlet pipe communicates with the inside of the installation box. A filter pipe is also installed inside the installation box. The filter pipe has several filter holes on its wall. Both ends of the filter pipe are connected to the end of the inlet pipe and the end of the first outlet pipe located inside the installation box, respectively. An on / off valve is installed on the second outlet pipe. Wastewater first enters the filter pipe through the inlet pipe. The filter pipe has filter holes, and some wastewater passes through the filter holes to the installation box and is then discharged through the second outlet pipe. Solid impurities continue to enter the first outlet pipe with the remaining wastewater. The solid impurity content of this portion of wastewater is relatively increased, so a filter cake can be formed more quickly in the subsequent filtration process. Overall, less wastewater needs to be filtered twice, and the overall efficiency is improved. Therefore, this solves the problem in the prior art where wastewater with low solid impurity content requires a long time to form a filter cake, resulting in a large amount of wastewater needing secondary filtration.

[0005] Furthermore, the filter tube has a gradually changing inner diameter, and the inner diameter of the end connected to the water inlet pipe is larger than that of the other end.

[0006] Furthermore, the first outlet pipe is located below the inlet pipe.

[0007] Furthermore, a first mounting ring and a second mounting ring are fixedly connected to both ends of the filter tube, a third mounting ring that is detachably connected to the first mounting ring is fixedly connected to the inlet pipe, and a fourth mounting ring that is detachably connected to the second mounting ring is fixedly connected to the first outlet pipe.

[0008] Furthermore, an inspection port is provided on the top surface of the mounting box, and an inspection door is provided at the inspection port for opening and closing.

[0009] Furthermore, a handle is also fixedly connected to the filter tube.

[0010] Furthermore, the second and fourth mounting rings are inclined, and their higher sides are close to the inner wall of the mounting box adjacent to them.

[0011] Furthermore, the second and fourth mounting rings are arranged vertically.

[0012] Furthermore, all filter holes are located in the upper middle part of the filter tube.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Before entering the filtration equipment, the wastewater is first introduced through the inlet pipe and then enters the filter pipe. The filter pipe is equipped with filter holes, and some wastewater will pass through the filter holes to the installation box and then be discharged through the second outlet pipe. Solid impurities continue to enter the first outlet pipe with the other part of the wastewater. The solid impurity content of this part of the wastewater is relatively higher, so the filter cake can be formed more quickly in the subsequent filtration process. Overall, less wastewater needs to be filtered twice, and the overall efficiency is improved. Therefore, it solves the problem in the existing technology that wastewater with low solid impurity content needs a long time to form a filter cake, resulting in a lot of wastewater needing to be filtered twice. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 2 ;

[0017] Figure 3 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0018] Figure 4 for Figure 2 Enlarged schematic diagram of the local structure at point B;

[0019] In the above attached figures:

[0020] Mounting box 1, inlet pipe 2, first outlet pipe 3, second outlet pipe 4, filter pipe 5, filter hole 6, on / off valve 7, first mounting ring 8, second mounting ring 9, third mounting ring 10, fourth mounting ring 11, inspection port 12, inspection door 13, handle 14. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0023] In an exemplary implementation, such as Figure 1-4 As shown, this embodiment provides a wastewater pretreatment device, which includes an installation box 1. An inlet pipe 2 and a first outlet pipe 3 are fixedly connected to one opposite side of the installation box 1. A second outlet pipe 4 is also fixedly connected to the bottom of the installation box 1. The inlet pipe 2 and the outlet pipe extend into the installation box 1, and the second outlet pipe 4 communicates with the inside of the installation box 1. A filter pipe 5 is also provided inside the installation box 1. A plurality of filter holes 6 are provided on the pipe wall of the filter pipe 5. The two ends of the filter pipe 5 are respectively connected to the end of the inlet pipe 2 and the end of the first outlet pipe 3 located in the installation box 1. An on / off valve 7 is provided on the second outlet pipe 4. Before entering the filtration equipment, the wastewater is first introduced into the filter pipe 5 inside the installation box 1 through the inlet pipe 2. The filter holes 6 on the filter pipe 5 allow some wastewater to pass through into the installation box 1 and then be discharged through the second outlet pipe 4 (at this time, the on / off valve 7 is open). Solid impurities enter the first outlet pipe 3 with another part of the wastewater and are then introduced into the filtration equipment together. The solid impurity content of this part of the wastewater is relatively increased, so the filter cake can be formed more quickly in the subsequent filtration process. Overall, less wastewater needs to be filtered twice, and the overall efficiency is improved. Therefore, it solves the problem in the prior art that wastewater with low solid impurity content needs a long time to form a filter cake, resulting in a lot of wastewater needing to be filtered twice. Furthermore, after the filter cake is formed, the on / off valve 7 on the second outlet pipe 4 can be closed, so that all the wastewater can enter the filtration equipment.

[0024] like Figure 1-4As shown, in a further embodiment, the filter pipe 5 is configured with a gradually changing inner diameter, larger at one end and smaller at the other. Specifically, the inner diameter of the end of the filter pipe 5 connected to the inlet pipe 2 is larger than that of the other end. This gradually restricts the flow of wastewater through the filter pipe 5, allowing some wastewater to pass through the filter holes 6 more quickly. Furthermore, the first outlet pipe 3 is located below the inlet pipe 2, meaning the filter pipe 5 is inclined towards the first outlet pipe 3. This allows the wastewater to flow downwards at an angle through the filter pipe 5, resulting in smoother flow. After closing the on / off valve 7 on the second outlet pipe 4, the wastewater will... First, fill the entire installation box 1, and then introduce all the wastewater into the filtration equipment through the first outlet pipe 3. At the same time, the first outlet pipe 3 can be set to have the same diameter as the smaller end of the filter pipe 5, so that the wastewater flow rate of the first outlet pipe 3 can be increased accordingly, and the treatment efficiency of the filtration equipment can also be improved accordingly. In a more detailed scheme, all the filter holes 6 are not distributed all over the entire wall of the filter pipe 5, but are set in the middle and upper part of the filter pipe 5. In this way, there are no filter holes 6 at the bottom of the filter pipe 5, which can ensure that some wastewater continuously enters the first outlet pipe 3.

[0025] like Figure 1-4 As shown, in a more specific embodiment, the two ends of the filter tube 5 are respectively fixedly connected to a first mounting ring 8 and a second mounting ring 9. The inlet pipe 2 is fixedly connected to a third mounting ring 10 that is detachably connected to the first mounting ring 8. The first outlet pipe 3 is fixedly connected to a fourth mounting ring 11 that is detachably connected to the second mounting ring 9. The detachable connections between them can all be achieved by bolts, which facilitates installation and disassembly. Furthermore, in order to facilitate subsequent inspection and maintenance, an inspection port 12 is also provided on the top surface of the installation box 1. An inspection door 13 is also provided at the inspection port 12 for opening and closing. By opening the inspection door 13, the internal filter tube 5 can be inspected or cleaned. More specifically, a handle 14 is also fixedly connected to the filter tube 5, which makes it convenient to remove the filter tube 5 from the installation box 1 for inspection and cleaning.

[0026] like Figure 1 , 3 As shown, the second mounting ring 9 and the fourth mounting ring 11 are arranged vertically, so that after disassembly, the filter tube 5 can be lifted upwards and removed through the inspection port 12. In another embodiment, such as... Figure 2 , 4 As shown, the second mounting ring 9 and the fourth mounting ring 11 are inclined, and their higher sides are close to the inner wall of the adjacent mounting box 1. With this arrangement, after the second mounting ring 9 and the fourth mounting ring 11 are removed (at the same time the first mounting ring 8 and the third mounting ring 10 are also removed), the filter tube 5 will not slide down directly, and the filter tube 5 can be lifted out more conveniently by the handle 14.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A wastewater pretreatment device, characterized in that, The system includes an installation box, on which an inlet pipe and a first outlet pipe are fixedly connected respectively. A second outlet pipe is also fixedly connected to the bottom of the installation box. The inlet pipe and the outlet pipe extend into the installation box, and the second outlet pipe communicates with the inside of the installation box. A filter pipe is also installed inside the installation box. The filter pipe has several filter holes on its wall. The two ends of the filter pipe are connected to the end of the inlet pipe and the end of the first outlet pipe located inside the installation box, respectively. An on / off valve is installed on the second outlet pipe.

2. The wastewater pretreatment device as described in claim 1, characterized in that, The filter tube has a gradually changing inner diameter, and the inner diameter of the end that connects to the water inlet pipe is larger than that of the other end.

3. The wastewater pretreatment device as described in claim 1, characterized in that, The first outlet pipe is located below the inlet pipe.

4. The wastewater pretreatment device as described in claim 1, characterized in that, The filter tube is fixedly connected to a first mounting ring and a second mounting ring at both ends, the inlet pipe is fixedly connected to a third mounting ring that is detachably connected to the first mounting ring, and the outlet pipe is fixedly connected to a fourth mounting ring that is detachably connected to the second mounting ring.

5. The wastewater pretreatment device as described in claim 4, characterized in that, An inspection port is also provided on the top surface of the mounting box, and an inspection door is provided at the inspection port for opening and closing.

6. The wastewater pretreatment device as described in claim 5, characterized in that, A handle is also fixedly connected to the filter tube.

7. The wastewater pretreatment device as described in claim 4, characterized in that, The second and fourth mounting rings are inclined, and their higher sides are close to the inner wall of the adjacent mounting box.

8. The wastewater pretreatment device as described in claim 4, characterized in that, The second and fourth mounting rings are set vertically.

9. The wastewater pretreatment device according to any one of claims 1-8, characterized in that, All filter holes are located in the upper middle part of the filter tube.

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