Sewage pretreatment device

Abstract

The invention discloses a sewage pretreatment device which is at least used for filtering large particles and suspended solids in sewage. The sewage pretreatment device comprises a main body, a filtering assembly, a switching assembly and a cleaning assembly. The main body comprises a plurality of filter tanks; the filter assemblies are arranged in the filter tanks, the filter assemblies and the filter tanks are arranged in a one-to-one correspondence mode, and each filter assembly is provided with a working position and a cleaning position; the switching assembly is arranged between the two adjacent filter tanks, the two adjacent filter assemblies are connected with the switching assembly, and the switching assembly is used for enabling one of the two adjacent filter assemblies to be settled to a working position and enabling the other one of the two adjacent filter assemblies to be lifted to a cleaning position; the cleaning assembly is arranged above the filtering assembly, and the cleaning assembly is used for cleaning the filtering assembly in the cleaning position. The sewage pretreatment device disclosed by the invention at least can solve the problem of low efficiency of removing large particulate matters and suspended matters in sewage.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water treatment, and in particular to a sewage pretreatment device. Background Art

[0002] At present, conventional domestic sewage treatment technology is becoming more and more mature, mainly through pretreatment, primary sedimentation, aeration, secondary sedimentation, disinfection to achieve the discharge standard, in the pretreatment stage mainly through physical methods, the use of screens to remove large particles and suspended matter, and then after subsequent treatment to meet the standards before discharge. Among them, whether the pretreatment stage can effectively remove large particles and suspended matter in sewage has an important impact on the efficiency and quality of the subsequent process treatment.

[0003] Chinese patent document CN221155606U discloses a water inlet grid pool for sewage treatment, comprising: a box body, and two partitions arranged inside the box body, and the two partitions divide the inside of the box body into a water inlet chamber in the middle and drainage chambers on both sides; also comprising a grid frame mechanism arranged in the middle of the two partitions; the grid frame mechanism comprises two frames, and the two frames are respectively arranged in the middle of the two partitions, and a transmission roller assembly arranged at the ends of the two frames, and a rotatable grid net is sleeved on the transmission roller assembly; and also comprising a cleaning mechanism arranged on the top of the two frames. The patent document has the following advantages and effects: through the rotation characteristics of the grid net, in conjunction with the action of the cleaning mechanism, the grid net can complete the sewage filtration while realizing the flushing and cleaning process of the grid net's own filter holes, thereby effectively reducing the adverse effects caused by blockage of the device and greatly improving the filtration efficiency of sewage. Although the above structure can realize the pretreatment of sewage and the cleaning effect of the grid. However, the design of the device is relatively complicated and increases the operating cost. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is to provide a grid pool with a simple design and capable of self-cleaning to solve the problem of low efficiency in removing large particles and suspended matter in sewage.

[0005] In order to solve the above technical problems, the embodiment of the present disclosure provides a sewage pretreatment device, which is used at least to filter large particles and suspended matter in sewage. The sewage pretreatment device includes:

[0006] The main body includes multiple filter tanks;

[0007] The filter assembly is arranged in the filter pool, and the filter assembly includes a plurality of filter assemblies, and the plurality of filter assemblies are arranged one by one corresponding to the plurality of filter pools, and the filter assembly has a working position and a cleaning position;

[0008] The switching assembly is disposed between two adjacent filter tanks, and the two adjacent filter assemblies are both connected to the switching assembly, and the switching assembly is used to make one of the two adjacent filter assemblies settle to the working position and the other one rise to the cleaning position; and,

[0009] The cleaning component is arranged above the filter component, and the cleaning component is used for cleaning the filter component in the cleaning position.

[0010] In some embodiments, a filter groove is disposed in each filter tank, and the filter assembly is covered at the notch of the filter groove to be in a working position.

[0011] In some embodiments, a water inlet main pipe is disposed outside the main body, the water inlet main pipe includes a water inlet branch pipe, the water inlet branch pipe is connected to the filter groove one by one and is located below the filter assembly, and a water inlet valve is disposed on the water inlet branch pipe.

[0012] In some embodiments, the sewage pretreatment device includes an outlet pipe, the outlet pipe is connected to the filter tank and is located outside the filter groove, the outlet pipe is arranged one-to-one with the filter tank, the outlet pipe is provided with an outlet valve, and,

[0013] The sewage pretreatment device also includes a sewage discharge pipe, which is connected to the filter grooves in a one-to-one correspondence, and a sewage discharge valve is arranged on the sewage discharge pipe.

[0014] In some embodiments, the filter assembly includes a first filter screen and a second filter screen arranged in a stacked manner, the mesh size of the first filter screen is larger than the mesh size of the second filter screen, the first filter screen and the second filter screen are arranged at a predetermined distance in the height direction, and the first filter screen is closer to the bottom of the filter pool than the second filter screen.

[0015] In some embodiments, the sewage pretreatment device also includes a support portion, which is arranged between two adjacent filter tanks, the switching component is arranged on the support portion, a slide groove is arranged on the support portion, and a slide rail used in conjunction with the slide groove is arranged on the filter component.

[0016] In some embodiments, the switching assembly includes a motor, a transmission mechanism, and a connecting piece. The motor drives the transmission mechanism and drives the connecting piece to control one of two adjacent filter assemblies to rise to a cleaning position and the other to sink to a working position.

[0017] In some embodiments, the transmission mechanism includes a sprocket, and the connecting member includes a chain, and the chain is engaged with the sprocket; wherein,

[0018] One end of the chain is connected to one of the two adjacent filter assemblies, and the other end of the chain is connected to the other of the two adjacent filter assemblies;

[0019] When the motor drives the sprocket to rotate, the rotation of the sprocket drives the chain to lift one of the two adjacent filter components to the cleaning position, and the other one sinks to the working position.

[0020] In some embodiments, the sewage pretreatment device also includes a pressure detector and a controller. The pressure detector is electrically connected to the controller. The pressure detector is arranged below the filter assembly. The controller is electrically connected to the motor. When the pressure detector detects that the pressure of the deposit in the pool reaches a preset value, the controller controls the motor to start and drives the transmission mechanism to drive the connecting part to switch the filter assembly from the working position to the cleaning position.

[0021] In some embodiments, the cleaning assembly includes a guide rail and a cleaning pipe, the guide rail is arranged on the main body, and the cleaning pipe slides back and forth on the guide rail to clean the filter assembly in the cleaning position.

[0022] Through the above technical scheme, the sewage pretreatment device provided by the present application has a plurality of filter tanks arranged in the main body, and a filter assembly is arranged in each filter tank to filter the sewage. The switching assembly is arranged between two adjacent filter tanks, and the switching assembly is connected to the filter assembly. During operation, the switching assembly can switch the filter assembly between the working position and the cleaning position. The cleaning assembly is arranged above the filter assembly. With such an arrangement, while filtering the sewage, the filter assembly in the cleaning position can also be inspected and self-cleaned, thereby improving the sewage pretreatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a schematic diagram of the overall structure of the sewage pretreatment device disclosed in the embodiment of the present application at a first viewing angle;

[0025] Figure 2 is a schematic diagram of the overall structure of the sewage pretreatment device disclosed in the embodiment of the present application at a first viewing angle;

[0026] Figure 3 is a top view of a sewage pretreatment device disclosed in an embodiment of the present application;

[0027] Figure 4 is a cross-sectional view of a sewage pretreatment device disclosed in an embodiment of the present application;

[0028] Figure 5It is a schematic diagram of the structure of the filter assembly disclosed in the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. Main body; 11. Filter tank; 111. Filter groove; 1111. Notch; 2. Filter assembly; 21. First filter screen; 22. Second filter screen; 23. Working position; 24. Cleaning position; 25. Support plate; 3. Switching assembly; 31. Motor; 32. Sprocket; 33. Chain; 34. Gear; 35. Rotating shaft; 4. Cleaning assembly; 41. Guide rail; 42. Cleaning pipe; 5. Water inlet main pipe; 51. Water inlet branch pipe; 6. Water outlet pipe; 7. Drain pipe; 8. Water inlet valve; 9. Water outlet valve; 10. Drain valve; 100. Support part; 101. Slide groove; 102. Slide rail. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0032] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0033] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0035] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0036] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0038] In order to solve the problem of low efficiency in removing large particles and suspended solids from sewage, according to an embodiment of the present application, a sewage pretreatment device is provided. The sewage pretreatment device of the present application will be described in detail below in conjunction with the accompanying drawings.

[0039] See also Figures 1 to 5 As shown, according to an embodiment of the present application, a sewage pretreatment device is provided, which is at least used to filter large particles and suspended matter in sewage, and the sewage pretreatment device includes a main body 1, a filtering component 2, a switching component 3 and a cleaning component 4.

[0040] Among them, the main body 1 includes multiple filter pools 11; the filter component 2 is arranged in the filter pool 11, the filter component 2 includes multiple, the multiple filter components 2 are arranged one-to-one with the multiple filter pools 11, and the filter component 2 has a working position 23 and a cleaning position 24; the switching component 3 is arranged between two adjacent filter pools 11, and the two adjacent filter components 2 are connected to the switching component 3, and the switching component 3 is used to make one of the two adjacent filter components 2 sink to the working position 23, and the other one of the two adjacent filter components 2 is lifted to the cleaning position 24; the cleaning component 4 is arranged above the filter component 2, and the cleaning component 4 is used to clean the filter component 2 in the cleaning position 24.

[0041] In the present application, a plurality of filter tanks 11 are provided in the main body 1, and a filter assembly 2 is provided in each filter tank 11 to filter sewage. A switching assembly 3 is provided between two adjacent filter tanks 11, and the switching assembly 3 is connected to the filter assembly 2. During operation, the switching assembly 3 can switch the filter assembly 2 between the working position 23 and the cleaning position 24. The cleaning assembly 4 is provided above the filter assembly 2. With such a configuration, while filtering sewage, the filter assembly 2 in the cleaning position 24 can also be inspected and self-cleaned, thereby improving the efficiency of sewage pretreatment.

[0042] Specifically, when it is detected that the pressure of the filtered deposits in the filter tank 11 that is performing filtering reaches a preset value, the switching component 3 is started to work, and the filter component 2 in the working position 23 of the two adjacent filter components 2 is lifted to the cleaning position 24, and the filter component 2 in the cleaning position 24 is settled to the working position 23. At this time, the sewage will enter the filter tank 11 where the filter component 2 is in the working position 23, and continue to filter the sewage. In this way, the pretreatment of the sewage continues, and the removal efficiency of suspended matter in the sewage is improved. In addition, a cleaning component 4 is provided above each filter component 2, and the cleaning component 4 is used to clean the filter component 2 switched from the working position 23 to the cleaning position 24, to avoid clogging of the filter component 2, and to ensure the filtering effect of the filter component 2 on the sewage when it is used next time.

[0043] That is to say, by using the above-mentioned sewage pretreatment device, the sewage pretreatment line can be switched under special circumstances, the sewage pretreatment work can be continued, and the filter component 2 can be self-cleaned, thereby improving the efficiency of removing large particles and suspended matter in sewage.

[0044] In some embodiments, the number of filter tanks 11 can be 2, 3, 4, 5, etc. The specific number is not limited in this application and is determined during actual design based on the actual situation of the sewage to be pretreated. Figures 1 to 4 The figure shows a case where the number of filter pools 11 is 2. By setting up 2 filter pools 11, the filter assembly 2 can be in a state of one in use and one in standby. The working state switching can be achieved by the switching assembly 3 to meet the actual production needs and reduce the production cost. Specifically, the number of filter assemblies 2 can be 2, 3, 4, 5, etc. One filter assembly 2 is set in one filter pool 11 to meet the function of filtering large particles and suspended matter. Therefore, the actual number of filter assemblies 2 is determined according to the number of filter pools 11.

[0045] In some embodiments, each filter tank 11 is provided with a filter groove 111, and the filter assembly 2 covers the notch 1111 of the filter groove 111 to be in the working position 23, such as Figures 1 to 4As shown. In the present application, the filter assembly 2 is covered and arranged at the notch 1111 of the filter groove 111, which can prevent larger particles and suspended matter from floating directly on the water surface without being treated from the gap between the filter assembly 2 and the filter groove 111, resulting in poor sewage pretreatment effect. In addition, when the filter assembly 2 needs to be repaired and maintained, the switching assembly 3 can realize the lifting of the filter assembly 2 in the working position 23 to the cleaning position 24, and the filter assemblies 2 on both sides can be easily repaired, thereby improving the repair efficiency.

[0046] In some embodiments, see again Figures 1 to 4 As shown, a water inlet pipe 5 is provided on the outside of the main body 1, and a water inlet branch pipe 51 is provided on the water inlet pipe 5, and the water inlet branch pipe 51 is connected to the filter groove 111 in a one-to-one correspondence and is located below the filter assembly 2. Such a configuration can improve the effect of sewage pretreatment and reduce the impact of large particles and suspended matter on subsequent sewage treatment processes. In addition, a water inlet valve 8 is provided on the water inlet branch pipe 51, and the water inlet valve 8 can control the water inflow of sewage; prevent backflow; and achieve rapid response in emergency situations. In the present application, the water inlet valve 8 can be controlled manually or automatically, and no specific restrictions are made in the present application.

[0047] In some embodiments, the sewage pretreatment device includes an outlet pipe 6, which is connected to the filter tank 11 and is located outside the filter groove 111. When large particles and suspended matter in the sewage passing through the filter component 2 are intercepted by the filter component 2, the pretreated sewage is discharged to the next sewage treatment unit through the outlet pipe 6 located outside the filter groove 111. The outlet pipe 6 is arranged outside the filter groove 111, so that the sewage can reduce the impact of suspended matter on subsequent sewage treatment units under the action of further precipitation. In addition, the outlet pipe 6 is arranged in a one-to-one correspondence with the filter tank 11, so that the production cost can be reduced. The outlet pipe 6 is provided with an outlet valve 9 for controlling the state and flow rate of the outlet water, and realizing rapid response in the event of an emergency. In the present application, the outlet valve 9 can be manually controlled or automatically controlled, without specific restrictions.

[0048] In some embodiments, the sewage pretreatment device further includes a drain pipe 7. The drain pipe 7 is connected to the filter groove 111 in a one-to-one correspondence. The deposits in the filter groove 111 need to be discharged through the drain pipe 7 for subsequent treatment. A drain valve 10 is provided on the drain pipe 7. Specifically, when it is detected that the pressure value of the accumulated large particles and suspended matter in the filter groove 111 reaches a preset value, it is necessary to start the cleaning component 4 to clean the filter component 2, open the drain valve 10, and discharge the sewage containing a large amount of particles and suspended matter from the filter groove 111 for treatment. The setting of the drain pipe 7 and the drain valve 10 ensures that the sewage pretreatment work is carried out in an orderly manner.

[0049] like Figure 5 As shown, the filter assembly 2 includes a first filter screen 21 and a second filter screen 22 which are stacked, and the mesh of the first filter screen 21 is larger than the mesh of the second filter screen 22. In this way, the first filter screen 21 and the second filter screen 22 are used together to form a multi-level interception system, thereby comprehensively intercepting various impurities and ensuring the water quality entering the subsequent treatment unit; and can improve the treatment efficiency of the sewage treatment system and reduce the failure and maintenance costs caused by impurities. The first filter screen 21 and the second filter screen 22 are arranged at a predetermined distance in the height direction, and the first filter screen 21 is closer to the bottom of the filter pool 11 than the second filter screen 22. That is to say, the sewage first passes through the first filter screen 21 to remove larger debris, which reduces the burden of subsequent treatment and protects subsequent equipment; and then passes through the second filter screen 22 to further remove small particles, improve water quality, and reduce the amount of sludge generated, thereby reducing the cost of sludge treatment.

[0050] In some embodiments, the sewage pretreatment device further includes a support portion 100, which is disposed between two adjacent filter tanks 11, and the switching component 3 is disposed on the support portion 100. In this way, one switching component 3 can be used to simultaneously connect two filter components 2. A slide groove 101 is disposed on the support portion 100, and a slide rail 102 used in conjunction with the slide groove 101 is disposed on the filter component 2. Figure 5 As shown, the first filter screen 21 and the second filter screen 22 are integrally arranged on the fixed frame to form the filter assembly 2, and the specific fixing method can be clamping, screw fixing, etc. A slide groove 101 is arranged on the support part 100, and a slide rail 102 is arranged on the filter assembly 2. When the filter assembly 2 needs to be cleaned or repaired, the switching assembly 3 is started to smoothly switch the filter assembly 2 between the working position 23 and the cleaning position 24. The use of the slide groove 101 and the slide rail 102 can reduce the wear between the switching assembly 3 and the filter assembly 2 and extend the service life of the equipment.

[0051] In some embodiments, Figures 1 to 4 As shown, the switching component 3 includes a motor 31, a transmission mechanism and a connecting piece. Specifically, when it is detected that the filter component 2 is in the working position 23, when the pressure of the deposits in the filter groove 111 reaches a predetermined value, the signal is transmitted to the switching component 3, the motor 31 drives the transmission mechanism to drive and drive the connecting piece to control one of the two adjacent filter components 2 to rise to the cleaning position 24, and the other of the two sinks to the working position 23. In this way, the continuous operation of the sewage pretreatment device can be achieved, the treatment efficiency of large particles and suspended matter in the sewage can be improved, and the operation efficiency of the sewage treatment equipment can be improved.

[0052] Specifically, the transmission mechanism includes a sprocket 32, and the connecting member includes a chain 33, and the chain 33 is meshed with the sprocket 32. Among them, one end of the chain 33 is connected to one of the two adjacent filter assemblies 2, and the other end of the chain 33 is connected to the other of the two adjacent filter assemblies 2, so that the two adjacent filter assemblies 2 can be interchanged in position during actual work. The actual work is that when the motor 31 receives a start signal, the motor 31 drives the gear 34 connected to the sprocket 32 ​​to engage, thereby driving the sprocket 32 ​​to rotate. Since the chain 33 is arranged on the sprocket 32, the sprocket 32 ​​is meshed with the chain 33, and one of the two adjacent filter assemblies 2 is lifted to the cleaning position 24, and the other of the two sinks to the working position 23. With such a design, in an emergency, sewage pretreatment can be carried out sustainably, thereby improving the efficiency of sewage pretreatment.

[0053] Specifically, in the present application, the filter assembly 2 includes two support plates 25, one of which is higher than the other support plate 25, and the first filter screen 21 and the second filter screen 22 of the filter assembly 2 can be fixed between the two support plates 25 by means of clamping, screw connection, etc. to form a whole. The support plate 25 with a higher height is arranged on the side close to the support portion 100, and one end of the chain 33 on the switching assembly 3 is connected to the support plate 25 with a higher height in the two adjacent filter assemblies 2 through a fixed structure. And the support plate 25 is provided with a slide rail 102 corresponding to the slide groove 101 on the support portion 100. When the switching assembly 3 is working, the entire filter assembly 2 can be driven to be lifted upward to the cleaning position 24 by lifting the support plate 25. The height of the support plate 25 is higher, and the length of the slide rail 102 that can be set is longer, so it is easier to switch between the working position 23 and the cleaning position 24. In addition, the support plate 25 is provided to reduce the direct contact friction between the filter screen and the support portion 100, which can extend the service life of the filter assembly 2.

[0054] In some embodiments, the sprockets 32 and the chains 33 can be arranged in 1 group, 2 groups, 3 groups, etc. In the present application, the sprockets 32 and the chains 33 are arranged in 2 groups, and the two sprockets 32 are arranged at intervals along the axial direction of the rotating shaft 35. A rotating shaft 35 is arranged between the two groups of sprockets 32, and the motor 31 drives the gear 34 to rotate, thereby driving the sprockets 32, the chains 33 and the rotating shaft 35 to rotate, thereby driving the two adjacent groups of filter assemblies 2 to switch from the working position 23 to the cleaning position 24 or from the cleaning position 24 to the working position 23. The two groups of sprockets 32 and the chains 33 are arranged to ensure the stability of the filter assembly 2 during the lifting or settling process, and also reduce the production cost.

[0055] In some embodiments, the sewage pretreatment device further includes a pressure detector (not shown in the figure) and a controller (not shown in the figure). The pressure detector is electrically connected to the controller. The pressure detector is arranged below the filter assembly 2, and the controller is electrically connected to the motor 31; when the pressure detector detects that the pressure of the deposit at the bottom of the filter groove 111 reaches a preset value, the detector transmits a signal to the controller, and the controller controls the motor 31 to start and drive the transmission mechanism to drive the connecting member to switch the filter assembly 2 from the working position 23 to the cleaning position 24. With such a setting, the situation of the deposit accumulated at the bottom of the filter groove 111 in the sewage pretreatment device can be grasped in time, and corresponding measures can be taken to switch the filter assembly 2 to work, thereby improving the pretreatment efficiency of the sewage pretreatment device for sewage.

[0056] In some embodiments, the sewage pretreatment device also includes a cleaning component 4. The cleaning component 4 includes a guide rail 41 and a cleaning pipe 42. The guide rail 41 is set on the main body 1, and the cleaning pipe 42 slides back and forth on the guide rail 41 to clean the filter component 2 in the cleaning position 24. After the above-mentioned pressure detection process, the control switching component 3 starts to work and lifts the filter component 2 that needs to be cleaned to the cleaning position 24. And start the cleaning component 4, as the cleaning pipe 42 slides back and forth on the guide rail 41, the blocked part of the filter component 2 is flushed and cleaned. The sewage pretreatment device can not only filter the sewage, but also realize the automatic cleaning process of the filter component 2. The water used by the cleaning component 4 in the cleaning process can be the water from the subsequent sewage treatment unit for reuse, or tap water can be used.

[0057] Specifically, a plurality of high-pressure cleaning nozzles (not shown in the figure) are arranged at intervals on the cleaning pipe 42, which can prevent a large amount of impurities from adhering to the surface of the filter assembly 2 after long-term use, so as to ensure the decontamination efficiency of the filter assembly 2 in sewage pretreatment. The bottom of the filter pool 11 is arranged near the sewage discharge pipe 7 to have a predetermined inclination angle. After the cleaning pipe 42 cleans the filter assembly 2, the deposits in the filter pool 11 are smoothly discharged out of the pool. In addition, when the high-pressure cleaning nozzle slides back and forth on the guide rail 41 to spray water, the deposits at the bottom of the pool can also be dispersed, which is more conducive to the discharge of the deposits out of the pool.

[0058] Specifically, the pretreatment method of the sewage pretreatment device in the present application is: first, the water inlet valve 8 on the water inlet branch pipe 51 on the filter pool 11 with the filter assembly 2 in the working position is controlled, and the sewage enters the filter groove 111. After being filtered by the filter assembly 2, the sewage overflows upward into the filter pool 11, and the larger particles and suspended matter in the sewage are trapped below the filter assembly 2. A pressure detector is installed at the bottom of the filter groove 111. When the pressure detector detects that the pressure value at the bottom of the pool reaches a preset value, the pressure detector transmits a signal to the controller electrically connected to the pressure sensor, closes the corresponding water inlet valve 8 and water outlet valve 9, and opens the water inlet valve 8 and water outlet valve 9 on the water inlet branch pipe 51 of another filter pool 11. The controller controls the motor 31 to start, and the motor 31 drives the gear 34 to rotate, so that the sprocket 32 ​​and the rotating shaft 35 rotate, thereby driving the chain 33 to lift the filter assembly 2 upward until it stops at the cleaning position 24. The drain valve 10 is opened, the cleaning component 4 is started, and the impurities on the filter component 2 are washed with high pressure. The sewage containing impurities is discharged through the drain valve 10 and then subjected to subsequent treatment, which is not described in detail in this application.

[0059] In summary, in the present application, filter assemblies 2 are correspondingly arranged in a plurality of filter tanks 11, and a switching assembly 3 is used to connect two adjacent groups of filter assemblies 2, so that one of the adjacent filter assemblies 2 can be lifted to the cleaning position 24, and the other of the two can be settled to the working position 23. In the process of sewage pretreatment, the sewage can be filtered and the filter assembly 2 can be self-cleaned at the same time, which improves the sewage pretreatment efficiency and is conducive to the inspection and maintenance of the filter assembly 2. In addition, in the present application, after forming an interception system by forming a first filter net 21 and a second filter net 22 with larger meshes, the suspended matter in the sewage can be filtered at one time, the filtering efficiency is improved, and the influence of larger particles and suspended matter on the subsequent sewage treatment unit is reduced. A pressure detector is arranged in the filter groove 111, and is electrically connected to the controller and the switching assembly 3, so as to realize automatic control, reduce the cost of manual operation and improve work efficiency.

[0060] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0061] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A sewage pretreatment device, which is used at least to filter large particles and suspended matter in sewage, characterized in that: The sewage pretreatment device comprises: A main body (1), wherein the main body (1) comprises a plurality of filter tanks (11); A filter assembly (2), the filter assembly (2) being arranged in the filter pool (11), the filter assembly (2) comprising a plurality of filter assemblies (2), the plurality of filter assemblies (2) being arranged in a one-to-one correspondence with the plurality of filter pools (11), the filter assembly (2) having a working position (23) and a cleaning position (24); a switching component (3), the switching component (3) being arranged between two adjacent filter pools (11), the two adjacent filter components (2) being connected to the switching component (3), the switching component (3) being used to make one of the two adjacent filter components (2) sink to the working position (23), and the other one of the two adjacent filter components (2) be lifted to the cleaning position (24); and, A cleaning component (4), the cleaning component (4) being arranged above the filter component (2), the cleaning component (4) being used to clean the filter component (2) in the cleaning position (24).

2. The sewage pretreatment device according to claim 1, characterized in that: A filtering groove (111) is provided in each filtering pool (11), and the filtering assembly (2) covers a notch (1111) provided in the filtering groove (111) to be in the working position (23).

3. The sewage pretreatment device according to claim 2, characterized in that: A water inlet main pipe (5) is arranged outside the main body (1), the water inlet main pipe (5) comprises a water inlet branch pipe (51), the water inlet branch pipe (51) is connected to the filter groove (111) in a one-to-one correspondence and is located below the filter assembly (2), and a water inlet valve (8) is arranged on the water inlet branch pipe (51).

4. The sewage pretreatment device according to claim 2, characterized in that: The sewage pretreatment device comprises a water outlet pipe (6), the water outlet pipe (6) is connected to the filter tank (11) in a one-to-one correspondence and is located outside the filter groove (111), the water outlet pipe (6) is provided with a water outlet valve (9), and, The sewage pretreatment device further comprises a sewage discharge pipe (7), the sewage discharge pipe (7) being connected to the filtering grooves (111) in a one-to-one correspondence, and a sewage discharge valve (10) being arranged on the sewage discharge pipe (7).

5. The sewage pretreatment device according to claim 1, characterized in that: The filter assembly (2) comprises a first filter screen (21) and a second filter screen (22) which are stacked, the mesh size of the first filter screen (21) being larger than the mesh size of the second filter screen (22), the first filter screen (21) and the second filter screen (22) being arranged at a predetermined distance in a height direction, and the first filter screen (21) being closer to the bottom of the filter pool (11) than the second filter screen (22).

6. The sewage pretreatment device according to claim 1, characterized in that: The sewage pretreatment device further comprises a support portion (100), wherein the support portion (100) is arranged between two adjacent filter tanks (11), the switching component (3) is arranged on the support portion (100), a slide groove (101) is arranged on the support portion (100), and a slide rail (102) used in conjunction with the slide groove (101) is arranged on the filter component (2).

7. The sewage pretreatment device according to claim 1, characterized in that: The switching assembly (3) comprises a motor (31), a transmission mechanism and a connecting piece, wherein the motor (31) drives the transmission mechanism to transmit and drives the connecting piece to control one of the two adjacent filter assemblies (2) to rise to the cleaning position (24) and the other to sink to the working position (23).

8. The sewage pretreatment device according to claim 7, characterized in that: The transmission mechanism comprises a sprocket (32), the connecting member comprises a chain (33), and the chain (33) is meshed with the sprocket (32); wherein: One end of the chain (33) is connected to one of the two adjacent filter assemblies (2), and the other end of the chain (33) is connected to the other of the two adjacent filter assemblies (2); When the motor (31) drives the sprocket (32) to rotate, the rotation of the sprocket (32) drives the chain (33) to lift one of the two adjacent filter assemblies (2) to the cleaning position (24) and to lower the other one to the working position (23).

9. The sewage pretreatment device according to claim 7, characterized in that: The sewage pretreatment device further comprises a pressure detector and a controller, wherein the pressure detector is electrically connected to the controller, the pressure detector is arranged below the filter assembly (2), and the controller is electrically connected to the motor (31). When the pressure detector detects that the pressure of the deposits in the pool reaches a preset value, the controller controls the motor (31) to start and drive the transmission mechanism to drive the connecting member so that the filter assembly (2) switches from the working position (23) to the cleaning position (24).

10. The sewage pretreatment device according to any one of claims 1 to 9, characterized in that: The cleaning assembly (4) comprises a guide rail (41) and a cleaning pipe (42); the guide rail (41) is arranged on the main body (1); and the cleaning pipe (42) slides back and forth on the guide rail (41) to clean the filter assembly (2) in the cleaning position (24).

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