Multi-stage sewage treatment equipment and treatment process

Abstract

The invention relates to the technical field of sewage treatment, in particular to multi-stage sewage treatment equipment and a treatment technology.The multi-stage sewage treatment equipment comprises a multi-stage filtering mechanism which comprises an outer protection barrel, a water inlet barrel coaxially arranged at one end of the outer protection barrel and a water filtering barrel coaxially arranged in the outer protection barrel; a plurality of filtering covers are arranged between the outer protection cylinder and the water filtering cylinder in the axial direction of the water filtering cylinder in an array sleeving mode, and the large-diameter ends of the filtering covers are arranged on the side away from the water inlet cylinder; the dosing treatment mechanism is arranged at one end, far away from the water inlet cylinder, of the outer protective cylinder and comprises a treatment box, a dosing box fixedly arranged on the top surface of the treatment box and a water outlet cylinder arranged in the treatment box; filtering grooves are formed in the side walls of the filtering covers in the circumferential direction in an array mode, the sizes of the filtering grooves in the filtering covers are gradually reduced from one end of the water inlet cylinder to one end of the treatment box, the sewage treatment equipment can achieve efficient treatment of solid waste in sewage, meanwhile, the chemical adding amount of chemical treatment can be adjusted according to water flow, and practicability is good.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a multi-stage wastewater treatment equipment and process. Background Technology

[0002] Wastewater refers to wastewater generated from various domestic, industrial, agricultural, and urban activities, containing various wastes, organic matter, chemical substances, microorganisms, and suspended solids. The composition of wastewater is very complex, including organic matter, suspended solids, chemical substances, and microorganisms. These components may pose potential threats to the environment and human health. If wastewater is discharged directly into the environment, it will pollute water bodies, soil, and air. Therefore, existing wastewater needs to be treated through multiple stages of treatment, such as filtration, flocculation, sedimentation, chemical treatment, and biological treatment, before it can be recycled and reused. Thus, multiple types of equipment need to be used in combination during wastewater treatment. For example, existing published documents CN117326659A - A wastewater treatment reaction tank and wastewater treatment process and existing published documents CN119406113A - A multi-stage wastewater treatment equipment and its treatment process both disclose a device for wastewater treatment. Although existing wastewater treatment equipment and combinations can achieve effective wastewater treatment, existing wastewater treatment equipment still has the following shortcomings in actual use: 1. In the primary treatment of wastewater, solid waste needs to be intercepted and filtered by filtration equipment. However, because the solid waste in wastewater is of different sizes, the existing filtration equipment has to be designed with small filter holes to achieve sufficient filtration of solid waste. Although this design can achieve sufficient filtration, it will indirectly reduce the efficiency of water flow. Moreover, because the filter holes are small, solid waste will easily clog the filter device, which will require the staff to handle the waste frequently and increase the labor intensity of the staff. 2. Before chemical treatment, workers need to add appropriate chemical powder to the wastewater. However, due to the different flow rates of the wastewater, the amount of powder to be added will also vary. The existing addition method makes it difficult to achieve effective and precise addition, resulting in insufficient wastewater treatment. Therefore, it is necessary to improve the existing technology to solve the above-mentioned technical problems. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problem of low water flow rate in the existing sewage treatment equipment, a multi-stage sewage treatment device is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-stage sewage treatment device, comprising a multi-stage filtration mechanism, including an outer casing, an inlet cylinder coaxially disposed at one end of the outer casing, and a filter cylinder coaxially disposed inside the outer casing; a plurality of filter covers are arranged in an array along the axial direction of the filter cylinder between the outer casing and the filter cylinder, and the larger diameter end of the filter cover is disposed away from the inlet cylinder; and a dosing mechanism disposed at the end of the outer casing away from the inlet cylinder, including a treatment tank, a dosing box fixed on the top surface of the treatment tank, and an outlet cylinder disposed inside the treatment tank; filter grooves are arranged in an array along the circumference on the sidewalls of the filter covers, and the size of the filter grooves on each filter cover increases from the inlet cylinder end to the outlet cylinder end. The treatment tank is gradually reduced in size at one end. A retrieval box communicating with the inside of the outer protective cylinder is fixedly installed at the upper end of the side wall of the outer protective cylinder, and a box cover is slidably fitted on the top surface of the retrieval box. Filter holes are arranged in a circumferential array on the side wall of the filter cylinder, and the maximum filtration size of the filter holes is smaller than the minimum filtration size of the filter tank. The end of the filter cylinder near the inlet cylinder is closed. A connecting flange is fixedly installed on the outer side wall of the open end of the filter cylinder, and the connecting flange is fixedly connected to the inner wall of the outer protective cylinder by bolts. A first connecting cylinder communicating with the inside of the filter cylinder is fixedly installed on the end face of the outer protective cylinder near the treatment tank. A fourth connecting cylinder is fixedly installed at the upper end of one side wall of the treatment tank, and the first connecting cylinder and the fourth connecting cylinder are fixed together by bolts.

[0006] The beneficial effects of this invention are as follows: When this sewage treatment equipment is in use, the sewage to be treated enters the outer casing through the inlet cylinder and is filtered through multiple arrays of filter covers. The size of the filter tanks on each filter cover gradually decreases from one end of the inlet cylinder to the other end of the treatment tank. This allows for the graded interception and collection of solid waste of different sizes. The filtered sewage then enters the filter cylinder through the filter holes. This design can grade and intercept waste of different sizes, avoiding the impact of small filter tank size on water flow speed. At the same time, the horizontal design of the filter cylinder can also prevent blockage and reduced water flow speed due to the accumulation of solid waste, effectively reducing the labor intensity of the workers.

[0007] As a preferred embodiment of the multi-stage sewage treatment equipment of the present invention, the inlet cylinder has one open end fixedly connected to the outer protective cylinder by bolts, and a second connecting cylinder communicating with the inside of the inlet cylinder is fixedly provided at the upper end of the side wall of the inlet cylinder.

[0008] As a preferred embodiment of the multi-stage sewage treatment equipment of the present invention, a support plate is fixedly provided on the inner wall of the inlet cylinder, and a rectangular groove is provided in the middle of the support plate, and a rectangular block is fixedly provided in the middle of the end plate of the filter cylinder for clearance matching with the rectangular groove.

[0009] As a preferred embodiment of the multi-stage sewage treatment equipment of the present invention, wherein: a first fixing ring is fixedly provided circumferentially at one end of the filter cover with the larger diameter and fits against the inner wall of the outer protective cylinder, and a second fixing ring is fixedly provided circumferentially at one end of the filter cover with the smaller diameter and fits against the outer wall of the filter cylinder.

[0010] As a preferred embodiment of the multi-stage wastewater treatment equipment of the present invention, it further includes a material transfer assembly, which includes a rotating rod and a rotating ring. The rotating rod slides through multiple filter covers. The rotating ring is slidably sleeved on the outer side of the second fixed ring. The outer wall of the rotating ring near the water inlet cylinder is provided with ring teeth. A gear disk is meshed on one side of the ring teeth, and multiple gear disks are fixedly sleeved on the same rotating rod. A baffle is fixed on the horizontal side of the outer wall of the filter cover, and a dirt-collecting plate that fits against the outer wall of the filter cover is fixed on the rotating ring.

[0011] As a preferred embodiment of the multi-stage sewage treatment equipment of the present invention, the inner side wall of the filter cover is fixedly connected to a limiting sleeve, and the limiting sleeve is slidably sleeved on the outside of the rotating rod. A limiting ring is fixedly sleeved on the rotating rod at the free end of the limiting sleeve. A positioning sleeve is slidably sleeved on the outside of the limiting sleeve, and the positioning sleeve is fixedly connected to the outer side wall of the filter cylinder. One end of the rotating rod slides through the support plate and the inlet cylinder in sequence and is fitted into the output end of the motor. The motor is fixedly connected to the outer side wall of the inlet cylinder.

[0012] Given that existing wastewater chemical treatment equipment cannot effectively adjust the amount of chemical powder added according to the water flow rate, the present invention provides a further optimized and improved multi-stage wastewater treatment equipment, wherein: an outlet cylinder coaxial with the fourth connecting cylinder is fixed on the inner wall of the treatment tank, a piston head is slidably sleeved on the outlet cylinder, and a telescopic rod fixed on one end face of the piston head slides through the free end of the outlet cylinder; multiple outlet grooves are arranged in a circumferential array on the side wall of the outlet cylinder; a sliding groove is formed on the inner top surface of the treatment tank along the axial direction of the outlet cylinder, and the sliding groove is connected to the discharge end of the dosing tank; a baffle plate is fitted in the sliding groove located directly below the discharge end, and the end of the baffle plate away from the fourth connecting cylinder is fixedly connected to one end of the telescopic rod through a linkage frame; a guide rod is fixed on the side wall of the linkage frame away from the fourth connecting cylinder, and the free end of the guide rod is slidably sleeved on the outer wall of the treatment tank; a spring is slidably sleeved on the guide rod.

[0013] Another beneficial effect of the present invention is that when the wastewater treatment equipment is in use, the filtered wastewater flows into the outlet cylinder through the fourth connecting cylinder and is discharged from the outlet trough on the outlet cylinder. During the discharge process, the water flow will squeeze the piston head, causing the piston head to slide in the outlet cylinder. The greater the water flow velocity, the greater the pressure provided. Thus, the distance the piston head moves in the outlet cylinder will be adjusted accordingly. During the movement of the piston head, the baffle plate can be moved accordingly through the linkage of the linkage frame to adjust the dispensing speed at the discharge end. In this way, the dispensing speed can be automatically adjusted according to the water flow speed to achieve effective and precise mixing of the powder with the wastewater, thereby improving the treatment efficiency.

[0014] In a preferred embodiment of the multi-stage wastewater treatment equipment of the present invention, a stirring assembly is fixedly provided in the dosing tank; a third connecting cylinder is fixedly provided at the lower end of the other side of the treatment tank where the fourth connecting cylinder is provided.

[0015] In a preferred embodiment of the multi-stage wastewater treatment equipment of the present invention, the length of the effluent trough is equal to the length of the discharge end of the dosing tank.

[0016] In addition, the present invention also provides the following technical solution: a multi-stage wastewater treatment process, wherein the above-mentioned multi-stage wastewater treatment equipment is applied to the treatment process according to the following steps; S1: The sewage is fed into the inlet cylinder through the second connecting cylinder, and then the sewage is guided into the outer protective cylinder; S2: Through the design of gradually decreasing filter tank size on the filter cover, solid waste of various sizes is intercepted and filtered in multiple stages. S3: After the solid waste filtration is completed, the water to be treated enters the water filter tube through the filter holes, and then enters the water outlet tube through the first connecting tube and the fourth connecting tube in sequence; S4: The water to be treated that enters the outlet cylinder is eventually discharged through the outlet tank and temporarily stored in the treatment tank; S5: The water to be treated enters the outlet cylinder and squeezes the piston head to move. Under the linkage of the linkage frame, the baffle plate moves synchronously to add the powder in the dosing box into the treatment box. S6: The water to be treated, mixed with the chemical powder, is fed into the treatment tank through the third connecting cylinder for further advanced treatment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of a multi-stage wastewater treatment device according to the present invention.

[0018] Figure 2 For the present invention Figure 1 Left rear view of the structure.

[0019] Figure 3 For the present invention Figure 1 A vertical sectional view of the structure along the axis of the outer casing.

[0020] Figure 4 For the present invention Figure 1 A horizontal sectional view of the structure along the axis of the outer casing.

[0021] Figure 5 This is a schematic diagram of the overall structure of the multi-stage filtration mechanism in this invention.

[0022] Figure 6 For the present invention Figure 5 Exploded view of the structure.

[0023] Figure 7 For the present invention Figure 6 Left rear view of the structure.

[0024] Figure 8 This is a diagram showing the filter cover, rotating rod, and rotating ring to be fitted together in this invention.

[0025] Figure 9 This is a diagram showing the filter cover and rotating ring to be fitted together in this invention.

[0026] Figure 10 This is a schematic diagram of the inner top surface structure of the processing box in this invention.

[0027] Figure 11 For the present invention Figure 10 Vertical sectional view of the structure along the diameter of the outlet cylinder. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth. Example 1

[0032] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the first embodiment of the present invention. This embodiment provides a multi-stage sewage treatment device. When the multi-stage sewage treatment device is in use, the multi-stage filtration mechanism 100 is used to remove solid waste from the sewage, and the dosing mechanism 200 is used to add chemical powder to the sewage. After mixing, it is convenient for subsequent chemical treatment.

[0033] Specifically, it includes a multi-stage filtration mechanism 100, comprising an outer casing 101, an inlet cylinder 102 coaxially disposed at one end of the outer casing 101, and a filter cylinder 103 coaxially disposed inside the outer casing 101. Multiple filter covers 104 are arrayed between the outer casing 101 and the filter cylinder 103 along the axial direction of the filter cylinder 103, with the larger diameter end of the filter cover 104 disposed on the side away from the inlet cylinder 102, thereby maximizing the accumulation of intercepted solid waste on the side away from the filter cylinder 103. It also includes a chemical dosing mechanism 200 disposed at the end of the outer casing 101 away from the inlet cylinder 102, comprising a treatment box 201, a chemical dosing box 202 fixed on the top surface of the treatment box 201, and an outlet cylinder 203 disposed inside the treatment box 201.

[0034] See details Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, filter hoods 104b are arranged in a circumferential array on the sidewall of filter hood 104, and the size of the filter hoods 104b on each filter hood 104 gradually decreases from the water inlet cylinder 102 end to the processing tank 201 end, so as to achieve step-by-step interception according to the size of solid waste. A retrieval box 101a communicating with the inside of the outer protective cylinder 101 is fixed at the upper end of the sidewall of the outer protective cylinder 101, and a box cover 101a-1 is slidably sleeved on the top surface of the retrieval box 101a, so that the staff can retrieve the solid waste through the retrieval box 101a; filter holes 103a are arranged in a circumferential array on the sidewall of filter cylinder 103, and the maximum filtration size of the filter hole 103a is smaller than the minimum filtration size of the filter hood 104b, thereby preventing solid waste from entering the filter cylinder 103. The end of the water cylinder 103 near the inlet cylinder 102 is closed. A connecting flange 103d is fixed on the outer wall of the open end of the filter cylinder 103, and the connecting flange 103d is fixed to the inner wall of the outer protective cylinder 101 by bolts. A first connecting cylinder 101b communicating with the inside of the filter cylinder 103 is fixed on the end face of the outer protective cylinder 101 near the treatment box 201. A fourth connecting cylinder 201b is fixed at the upper end of one side wall of the treatment box 201, and the first connecting cylinder 101b and the fourth connecting cylinder 201b are fixed together by bolts. The open end of the inlet cylinder 102 is fixedly connected to the outer protective cylinder 101 by bolts. A second connecting cylinder 102a communicating with the inside of the inlet cylinder 102 is fixed at the upper end of the side wall of the inlet cylinder 102, and the second connecting cylinder 102a is connected to the sewage conveying pipe. In use, the wastewater to be treated enters the inlet cylinder 102 through the second connecting cylinder 102a and is then guided to the outer protective cylinder 101. The multiple filter covers 104 enable multi-level classification and interception of solid waste. The filtered wastewater enters the filter cylinder 103 through the filter holes 103a to separate solid waste from the wastewater. The filtered wastewater is then discharged through the first connecting cylinder 101b. After the solid waste is filtered, the staff can periodically open the box cover 101a-1 and retrieve the solid waste intercepted by the filter covers 104 from the retrieval box 101a for subsequent processing.

[0035] Furthermore, a support plate 102b is fixed on the inner wall of the water inlet cylinder 102, and a rectangular groove 102b-1 is opened in the middle of the support plate 102b. A rectangular block 103c for clearance fit with the rectangular groove 102b-1 is fixed in the middle of the end plate of the filter cylinder 103, which can improve the stability of the filter cylinder 103.

[0036] Furthermore, a first fixing ring 104a that fits against the inner wall of the outer protective cylinder 101 is fixed circumferentially at one end of the filter cover 104 with a larger diameter, and a second fixing ring 104c that fits against the outer wall of the water filter cylinder 103 is fixed circumferentially at one end of the filter cover 104 with a smaller diameter, so as to improve the filtration effect. Example 2

[0037] Reference Figure 6 , Figure 8 and Figure 9 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The difference is that, in order to avoid the accumulation of garbage around the filter cover 104 and the inconvenience of cleaning by the staff, a moving component 105 is proposed to solve the above problem.

[0038] Specifically, the material transfer assembly 105 includes a rotating rod 105a and a rotating ring 105b. The rotating rod 105a slides through multiple filter covers 104. The rotating ring 105b is slidably sleeved on the outer side of the second fixed ring 104c. A ring tooth 105b-1 is provided on the outer wall of the rotating ring 105b near the water inlet cylinder 102. A gear disk 105a-2 is meshed on one side of the ring tooth 105b-1. Multiple gear disks 105a-2 are fixedly sleeved on the same rotating rod 105a. A baffle 104d is fixed on the horizontal side of the outer wall of the filter cover 104. A dirt-collecting plate 105b-2 that fits against the outer wall of the filter cover 104 is fixed on the rotating ring 105b. In use, the above-mentioned setup allows multiple gear disks 105a-2 to rotate synchronously by rotating the rotating rod 105a. Due to the meshing between the gear disks 105a-2 and the ring gears 105b-1, the rotation of the gear disks 105a-2 causes the rotating ring 105b to drive the dirt-collecting plate 105b-2 to rotate around the filter cover 104. With the baffle 104d, the accumulated garbage can be collected at the upper end of the filter cover 104, which on the one hand prevents the water flow rate from being reduced due to garbage obstruction, and on the other hand makes it convenient for staff to retrieve the garbage through the retrieval box 101a. Example 3

[0039] Reference Figure 6 , Figure 7 , Figure 8 and Figure 9 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that in order to avoid the accumulation of certain garbage on the outer wall of the water filter cylinder 103 during long-term use, which would be inconvenient to clean, affect filtration, and cause corrosion of the equipment, this embodiment is proposed.

[0040] Specifically, a limiting sleeve 104e is fixedly connected to the inner wall of the filter cover 104, and the limiting sleeve 104e is slidably sleeved on the outside of the rotating rod 105a. A limiting ring 105a-3 is fixedly sleeved on the rotating rod 105a at the free end of the limiting sleeve 104e. A positioning sleeve 103b is slidably sleeved on the outside of the limiting sleeve 104e to limit and fix the filter cover 104. The positioning sleeve 103b is fixedly connected to the outer wall of the water filter cylinder 103. One end of the rotating rod 105a slides through the support plate 102b and the water inlet cylinder 102 in sequence and is fitted into the output end of the motor 105a-1. The motor 105a-1 is fixedly connected to the outer wall of the water inlet cylinder 102. The motor 105a-1 is electrically connected to the controller through a transmission line. The controller is set in a position convenient for the operator to operate. When the above-mentioned setup is in use, after the sewage has been treated for a certain period of time, the staff can remove the inlet cylinder 102 from the outer protective cylinder 101. This allows the rotating rod 105a to be dragged outwards. With the limit ring 105a-3 limiting the limit sleeve 104e, when the rotating rod 105a is dragged, multiple filter covers 104 will also move synchronously along the axis of the filter cylinder 103. The filter covers 104 can scrape and collect the debris on the outer wall of the filter cylinder 103, so that the staff can collect the debris attached to the outer wall of the filter cylinder 103 in a timely manner. Example 4

[0041] Reference Figure 3 , Figure 4 , Figure 10 and Figure 11 This is the fourth embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that the addition of drugs before chemical treatment can be more precise and efficient. Therefore, this embodiment is proposed.

[0042] Specifically, a water outlet cylinder 203 coaxial with the fourth connecting cylinder 201b is fixed on the inner wall of the treatment box 201. A piston head 203a is slidably sleeved on the water outlet cylinder 203, and a telescopic rod 203a-1 fixed on one end face of the piston head 203a slides through the free end of the water outlet cylinder 203. Multiple water outlet grooves 203c are arranged in a circumferential array on the side wall of the water outlet cylinder 203. The length of the water outlet grooves 203c is equal to the length of the discharge end of the dosing box 202. A sliding groove 201c is opened on the inner top surface of the treatment box 201 along the axial direction of the water outlet cylinder 203. The sliding groove 201c is connected to the discharge end of the dosing box 202. A baffle plate 202b is fitted in the sliding groove 201c located directly below the discharge end. The end of the baffle plate 202b away from the fourth connecting cylinder 201b is fixedly connected to one end of the telescopic rod 203a-1 through the linkage frame 203b. A guide rod 203b-1 is fixed on the side wall of the linkage frame 203b away from the fourth connecting cylinder 201b, and the free end of the guide rod 203b-1 is slidably sleeved on the outer wall of the processing box 201. A spring 203b-2 is slidably sleeved on the guide rod 203b-1. The spring 203b-2 can realize the reset of the linkage frame 203b, and the guide rod 203b-1 can realize the limiting guidance of the movement of the linkage frame 203b. In use, the wastewater treated by the multi-stage filtration mechanism 100 is input into the outlet cylinder 203 through the fourth connecting cylinder 201b, and finally falls into the treatment tank 201 from the outlet trough 203c on the outlet cylinder 203. When the wastewater passes through the outlet cylinder 203, the water pressure will squeeze the piston head 203a, causing the piston head 203a to move along the axis of the outlet cylinder 203. Through the linkage of the linkage frame 203b, the baffle plate 202b is finally moved along the axis of the outlet cylinder 203, so as to adjust the amount of powder discharged at the outlet end according to the size of the water flow.

[0043] Furthermore, a stirring component 202a is fixedly installed in the dosing tank 202 to stir the drugs stored in the dosing tank 202; a third connecting cylinder 201a is fixedly installed at the lower end of the other side of the treatment tank 201 which is provided with the fourth connecting cylinder 201b, and the third connecting cylinder 201a is connected to an external conveying pipe to facilitate the input of the wastewater after dosing into the sedimentation tank, which is more convenient for subsequent wastewater post-treatment. Example 5

[0044] This embodiment is the fifth embodiment of the present invention, which provides a multi-stage wastewater treatment process. Specifically, wastewater treatment is carried out according to the following steps; Wastewater is fed into the inlet cylinder 102 through the second connecting cylinder 102a, and then the wastewater is guided into the outer protective cylinder 101; By using the design of gradually decreasing size of the filter groove 104b on the filter cover 104, multi-stage interception and filtration of solid waste of various sizes is achieved. After the solid waste is filtered, the water to be treated enters the water filter tube 103 through the filter hole 103a, and then enters the water outlet tube 203 through the first connecting tube 101b and the fourth connecting tube 201b in sequence. The water to be treated that enters the outlet cylinder 203 is eventually discharged through the outlet tank 203c and temporarily stored in the treatment tank 201; When the water to be treated enters the outlet cylinder 203, it will squeeze the piston head 203a to move. Under the linkage of the linkage frame 203b, it will drive the baffle plate 202b to move synchronously, so as to add the powder in the dosing box 202 into the treatment box 201. The water to be treated, mixed with the chemical powder, is fed into the treatment tank through the third connecting cylinder 201a for further advanced treatment.

[0045] Additionally, it should be noted that components not described in detail in this article are existing technologies.

[0046] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the invention is not limited to the particular embodiments but extends to a variety of modifications that still fall within the scope of the appended claims.

[0047] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0048] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multi-stage wastewater treatment device, characterized in that: include, A multi-stage filtration mechanism (100) includes an outer casing (101), an inlet cylinder (102) coaxially disposed at one end of the outer casing (101), and a filter cylinder (103) coaxially disposed inside the outer casing (101). Multiple filter covers (104) are arranged in an array between the outer casing (101) and the filter cylinder (103) along the axial direction of the filter cylinder (103), with the larger diameter end of each filter cover (104) positioned away from the inlet cylinder (102). The dosing treatment mechanism (200) located at the end of the outer casing (101) away from the inlet cylinder (102) includes a treatment box (201), a dosing box (202) fixed on the top surface of the treatment box (201), and an outlet cylinder (203) located inside the treatment box (201). The filter cover (104) has filter grooves (104b) arranged in a circumferential array on its side wall. The size of the filter grooves (104b) on each filter cover (104) gradually decreases from one end of the water inlet cylinder (102) to one end of the treatment tank (201). A retrieval box (101a) communicating with the inside of the outer protective cylinder (101) is fixedly provided at the upper end of the side wall of the outer protective cylinder (101). A box cover (101a-1) is slidably sleeved on the top surface of the retrieval box (101a). The filter cylinder (103) has filter holes (103a) arranged in a circumferential array on its side wall. The maximum filter size of the filter hole (103a) is smaller than the minimum filter size of the filter tank (104b). The end of the filter cylinder (103) near the inlet cylinder (102) is closed. A connecting flange (103d) is fixed on the outer side wall of the open end of the filter cylinder (103). The connecting flange (103d) is fixed to the inner wall of the outer protective cylinder (101) by bolts. A first connecting cylinder (101b) communicating with the inside of the filter cylinder (103) is fixed on the end face of the outer protective cylinder (101) near the treatment box (201). A fourth connecting cylinder (201b) is fixed at the upper end of one side wall of the treatment box (201). The first connecting cylinder (101b) and the fourth connecting cylinder (201b) are fixed together by bolts.

2. The multi-stage wastewater treatment equipment as described in claim 1, characterized in that: The opening end of the water inlet cylinder (102) is fixedly connected to the outer protective cylinder (101) by bolts, and a second connecting cylinder (102a) that communicates with the inside of the water inlet cylinder (102) is fixedly provided at the upper end of the side wall of the water inlet cylinder (102).

3. The multi-stage wastewater treatment equipment as described in claim 2, characterized in that: A support plate (102b) is fixed on the inner wall of the water inlet cylinder (102), and a rectangular groove (102b-1) is opened in the middle of the support plate (102b). A rectangular block (103c) for clearance fitting with the rectangular groove (102b-1) is fixed in the middle of the end plate of the filter cylinder (103).

4. A multi-stage wastewater treatment device as described in claim 1 or 3, characterized in that: The filter cover (104) has a first fixing ring (104a) fixed along the circumferential direction at one end of the larger diameter, which fits against the inner wall of the outer protective cylinder (101), and a second fixing ring (104c) fixed along the circumferential direction at one end of the smaller diameter, which fits against the outer wall of the water filter cylinder (103).

5. A multi-stage wastewater treatment device as described in claim 4, characterized in that: It also includes a material transfer assembly (105), which includes a rotating rod (105a) and a rotating ring (105b). The rotating rod (105a) slides through multiple filter covers (104). The rotating ring (105b) is slidably sleeved on the outer side of the second fixed ring (104c). A ring tooth (105b-1) is provided on the outer wall of the end of the rotating ring (105b) near the water inlet cylinder (102). A gear disk (105a-2) is meshed on one side of the ring tooth (105b-1), and multiple gear disks (105a-2) are fixedly sleeved on the same rotating rod (105a). A baffle (104d) is fixed on the horizontal side of the outer wall of the filter cover (104), and a dirt-collecting plate (105b-2) that fits against the outer wall of the filter cover (104) is fixed on the rotating ring (105b).

6. A multi-stage wastewater treatment device as described in claim 5, characterized in that: The inner wall of the filter cover (104) is fixedly connected to a limiting sleeve (104e), and the limiting sleeve (104e) is slidably sleeved on the outside of the rotating rod (105a). A limiting ring (105a-3) is fixedly sleeved on the rotating rod (105a) at the free end of the limiting sleeve (104e). A positioning sleeve (103b) is slidably sleeved on the outside of the limiting sleeve (104e), and the positioning sleeve (103b) is fixedly connected to the outer wall of the water filter cylinder (103). One end of the rotating rod (105a) slides through the support plate (102b) and the water inlet cylinder (102) in sequence and is embedded in the output end of the motor (105a-1), and the motor (105a-1) is fixedly connected to the outer wall of the water inlet cylinder (102).

7. A multi-stage wastewater treatment device as described in claim 6, characterized in that: The inner wall of the processing tank (201) is fixed with a water outlet cylinder (203) coaxial with the fourth connecting cylinder (201b). The water outlet cylinder (203) is slidably sleeved with a piston head (203a), and a telescopic rod (203a-1) fixed on one end face of the piston head (203a) slides through the free end of the water outlet cylinder (203). Multiple water outlet grooves (203c) are arranged in a circumferential array on the side wall of the water outlet cylinder (203). A sliding groove (201c) is provided on the inner top surface of the treatment box (201) along the axial direction of the water outlet cylinder (203), and the sliding groove (201c) is connected to the discharge end of the dosing box (202). A baffle plate (202b) is fitted in the sliding groove (201c) located directly below the discharge end, and the end of the baffle plate (202b) away from the fourth connecting cylinder (201b) is fixedly connected to one end of the telescopic rod (203a-1) through the linkage frame (203b). A guide rod (203b-1) is fixed on the side wall of the linkage frame (203b) away from the fourth connecting cylinder (201b), and the free end of the guide rod (203b-1) is slidably sleeved on the outer wall of the processing box (201). A spring (203b-2) is slidably sleeved on the guide rod (203b-1).

8. A multi-stage wastewater treatment device as described in claim 7, characterized in that: The dosing box (202) is equipped with a stirring assembly (202a); a third connecting cylinder (201a) is fixed at the lower end of the other side of the treatment box (201) which is equipped with a fourth connecting cylinder (201b).

9. A multi-stage wastewater treatment device as described in claim 7, characterized in that: The length of the water outlet trough (203c) is equal to the length of the discharge end of the dosing box (202).

10. A multi-stage wastewater treatment process, characterized in that: The multi-stage wastewater treatment equipment according to any one of claims 1 to 9 is applied to the treatment process according to the following steps; S1: The sewage is fed into the inlet cylinder (102) through the second connecting cylinder (102a), and then the sewage is guided into the outer protective cylinder (101); S2: Through the design of the gradually decreasing size of the filter groove (104b) on the filter cover (104), solid waste of various sizes is intercepted and filtered in multiple stages; S3: After the solid waste filtration is completed, the water to be treated enters the water filter tube (103) through the filter hole (103a), and then enters the water outlet tube (203) through the first connecting tube (101b) and the fourth connecting tube (201b) in sequence; S4: The water to be treated that enters the outlet cylinder (203) is eventually discharged through the outlet tank (203c) and temporarily stored in the treatment tank (201); S5: The water to be treated enters the outlet cylinder (203) and squeezes the piston head (203a) to move. Under the linkage of the linkage frame (203b), the baffle plate (202b) moves synchronously so as to add the powder in the dosing box (202) into the treatment box (201). S6: The water to be treated, mixed with the chemical powder, is fed into the treatment tank through the third connecting cylinder (201a) for further advanced treatment.

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