Sewage treatment device and system

Abstract

The utility model relates to the field of sewage treatment, and discloses a sewage treatment device and system.The sewage treatment device comprises a first filter tank sliding into a second filter tank, the first filter tank and the second filter tank are each provided with a liquid inlet, a liquid outlet and a feeding port, the first filter tank at least has a first state, and the liquid inlet and the liquid outlet of the first filter tank are closed in the first state; the feed port of the first filter tank is opened, the liquid inlet and the liquid outlet of the second filter tank are both opened, and the feed port of the second filter tank is closed. According to the application, sodium sulfate is injected into the first filter tank by opening the feed port of the first filter tank, the sodium sulfate is reduced into required sulfur anions and ferric iron is reduced into ferrous iron through microorganisms in the first filter tank, so that the sulfur anions and the ferrous iron are recombined to form ferrous sulfide; and finally, reduction regeneration of the sulfide filter material is realized, so that the filter material does not need to be replaced in a short time, the reproducibility and reusability of the filter material are improved, the cost is reduced, sewage is treated by the second filter tank during the period, and the stability of water quality is ensured.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment, and more particularly to a wastewater treatment device and system. Background Technology

[0002] Sulfur autotrophic denitrification filters, as a highly efficient nitrogen removal technology, are widely used in wastewater treatment. Their core principle is to utilize sulfides as electron donors, achieving nitrate reduction and removal through the synergistic action of sulfur-oxidizing bacteria and denitrifying bacteria.

[0003] In existing technologies, researchers have focused on optimizing filter media structure or adjusting operating parameters to improve system efficiency. For example, they may adjust the pH of the filter media to maintain microbial activity or employ enhanced immobilization techniques to reduce filter media loss. However, these improvements fail to fundamentally address the continuous consumption of sulfide-containing filter media during sulfur autotrophic denitrification. As denitrification proceeds, inorganic sulfides (such as ferrous sulfide and elemental sulfur), which act as electron donors, are gradually converted into sulfates through oxidation, leading to a continuous decrease in the effective sulfur content of the filter media. When sulfides are consumed to a critical threshold, the system's nitrogen removal efficiency drops significantly, requiring manual replenishment or complete replacement of the filter media to restore treatment capacity. This process not only increases equipment maintenance costs and operational complexity but may also cause periodic fluctuations in the system's nitrogen removal performance due to the long rebuilding cycle of the microbial community after filter media replacement. Furthermore, the formation of a biofilm on the surface of new filter media requires an adaptation period of several weeks or even months, during which the effluent quality is difficult to consistently meet standards, posing a potential risk to continuously operating wastewater treatment systems. Utility Model Content

[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a wastewater treatment device and system.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] This application provides:

[0007] A wastewater treatment device, comprising:

[0008] First filter bed;

[0009] The second filter has an inlet, an outlet, and a feed inlet. The first filter has at least a first state in which the inlet and outlet are closed and the feed inlet is open. The second filter has both the inlet and outlet open and the feed inlet is closed.

[0010] Further, the number of the second filter tanks is N, and N≥1, when N>1, in the first state, the remaining second filter tanks are connected in series.

[0011] Further, the first filter tank has a second state, in which the liquid inlet and the liquid outlet of the first filter tank are both opened, the liquid inlet of the first filter tank is closed, the liquid inlet and the liquid outlet of the second filter tank are closed, and the feed inlet of the second filter tank is opened.

[0012] When N>1, the liquid inlet and the liquid outlet of at least one of the second filter tanks are closed, and the feed inlet of the at least one of the second filter tanks is opened, the liquid inlet and the liquid outlet of the remaining second filter tanks are both opened, the feed inlet of the remaining second filter tanks is closed, the liquid inlet and the liquid outlet of the first filter tank are opened, the feed inlet of the first filter tank is closed, and the remaining second filter tanks are connected in series with the first filter tank.

[0013] Further, the feed inlet is provided with a first feed pipe, which comprises a second feed pipe and a first valve body mounted on the second feed pipe, and the first valve body is used to control the connection and disconnection between the second feed pipe and the feed inlet.

[0014] Further, the liquid inlet of the first filter tank is provided with a first liquid inlet pipe, which is provided with a first liquid inlet valve used to control the connection and disconnection between the first liquid inlet pipe and the first filter tank, and the discharge outlet of the first liquid inlet pipe is connected and communicated with a first liquid outlet pipe, which is provided with a first liquid outlet valve used to control the connection and disconnection between the first liquid outlet pipe and the first liquid inlet pipe.

[0015] Further, the liquid inlet of the second filter tank is connected and communicated with a second liquid inlet pipe, which is connected and communicated with the first liquid outlet pipe, and the second liquid inlet pipe is provided with a second liquid inlet valve used to control the connection and disconnection between the second liquid inlet pipe and the second filter tank, and the liquid outlet of the second filter tank is connected and communicated with a second liquid outlet pipe, which is provided with a second liquid outlet valve used to control the connection and disconnection between the second liquid outlet pipe and the second filter tank.

[0016] Further, the sewage treatment device further comprises a liquid supply pipe, which is connected and communicated with a first pipe body connected and communicated with the first liquid inlet pipe and a second pipe body connected and communicated with the second liquid inlet pipe, the second pipe body is provided with a third valve body used to control the connection and disconnection between the liquid supply pipe and the second liquid inlet pipe, and the first pipe body is provided with a second valve body used to control the connection and disconnection between the liquid supply pipe and the first liquid inlet pipe.

[0017] Further, the sewage treatment device further comprises a first liquid discharge pipe, the first liquid discharge pipe is communicated with a first connecting pipe communicated with the first liquid outlet pipe and a second connecting pipe communicated with the second liquid outlet pipe, and the first connecting pipe and the second connecting pipe are provided with a fourth valve body.

[0018] Further, the second liquid outlet pipe is communicated with a first liquid return pipe, the first liquid return pipe is provided with a second liquid return pipe communicated with the first liquid inlet pipe at a direction far away from the second liquid outlet pipe, and the first liquid return pipe is provided with a fifth valve body.

[0019] The embodiment of the present application further provides a sewage treatment system, which comprises the sewage treatment device.

[0020] The present application injects sodium sulfate into the first filter tank through the feed inlet of the first filter tank, and the microorganisms in the first filter tank reduce the sodium sulfate into the required sulfur negative ions and trivalent iron into divalent iron, so that the sulfur negative ions and the divalent iron recombine to form ferrous sulfide, and finally realize the reduction and regeneration of the sulfide filter material, so that the filter material does not need to be replaced in a short time, the renewable and reusable property of the filter material is improved, the cost is reduced, and the water quality stability is ensured by treating the sewage through the second filter tank during this period.

[0021] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 The overall schematic diagram of the filter tank a and the filter tank b in series is shown;

[0024] Figure 2 The overall schematic diagram of the filter tank b and the first filter tank in series is shown;

[0025] Figure 3 The overall schematic diagram of the first filter tank and the filter tank a in series is shown.

[0026] Main element symbol explanation:

[0027] 100 - first filter tank; 110 - first liquid inlet pipe; 111 - first liquid inlet valve; 120 - first liquid outlet pipe; 121 - first liquid outlet valve; 200 - second filter tank; 210 - second liquid inlet pipe; 211 - second liquid inlet valve; 220 - second liquid outlet pipe; 221 - second liquid outlet valve; 300 - first feed pipe; 310 - second feed pipe; 320 - first valve body; 400 - liquid supply pipe; 410 - first pipe body; 411 - second valve body; 420 - second pipe body; 421 - third valve body; 510 - first liquid discharge pipe; 520 - first connecting pipe; 530 - second connecting pipe; 540 - fourth valve body; 600 - first liquid return pipe; 610 - second liquid return pipe; 611 - fifth valve body; 700 - second liquid discharge pipe; 710 - sixth valve body; 810 - flushing liquid inlet pipe; 820 - flushing liquid inlet valve; 830 - flushing liquid discharge pipe; 840 - flushing liquid discharge valve. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described below in detail with reference to examples illustrated in the accompanying drawings, in which like or similar elements or components are denoted throughout by like reference numerals, and of which the embodiments described below are illustrative only, and not restrictive of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0031] In this application, unless specifically defined otherwise, the terms "mount", "connect", "connection", "fixed", and the like, should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] In this application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] In the existing sulfur autotrophic denitrification filter, only the adjustment of the pH value of the filter material is considered, or only the effect of enhancing the fixation or backwashing of the filter material is considered to prolong the service life of the filter material, which ignores the problem that the inorganic sulfide filter material as an electron donor will be continuously consumed as the denitrification reaction proceeds. When the filter material is consumed to a certain extent, it needs to be supplemented or replaced, which not only increases the operation cost, but also the replacement process is more cumbersome, which may affect the normal operation of the filter. And the denitrification effect of the filter after replacing the filter material will be weakened, and the microorganisms need to grow again to form a biofilm to make the filter reach the best effect, which not only increases the time cost of denitrification, but also lacks stability in the denitrification efficiency for the long-term running system. The application utilizes the sulfur reduction and iron reduction of anaerobic organisms to reduce the added sodium sulfate into sulfur anions that can be used by sulfur autotrophic denitrification microorganisms, and reduce ferric ions into ferrous ions, and then the sulfur anions and ferrous ions are combined to form ferrous sulfide, so that the sulfide filter material can be regenerated in situ, thereby not needing to replace the filter material in a short time.

[0034] Please refer to Figure 1As shown, the sewage treatment device provided by the embodiment of the present application comprises a first filter tank 100 and a second filter tank 200, wherein the first filter tank 100 and the second filter tank 200 each have a liquid inlet, a liquid outlet and a feed inlet, the first filter tank 100 has at least a first state, in the first state, the liquid inlet and the liquid outlet of the first filter tank 100 are closed, the feed inlet of the first filter tank 100 is open, the liquid inlet and the liquid outlet of the second filter tank 200 are open, and the feed inlet of the second filter tank 200 is closed.

[0035] In the embodiment, the feed inlet in the above description can be understood as an inlet of the sodium sulfate solution, the liquid inlet is a sewage outlet, and the liquid outlet is an outlet of treated sewage.

[0036] Please continue to refer to Figure 1 As shown, in order to ensure that sewage can be normally filtered and treated during the regeneration of the filter material in the first filter tank 100, the sewage is treated by the second filter tank 200. Specifically, the feed inlet of the second filter tank 200 is closed, and the liquid inlet and the liquid outlet are open. At the same time, the liquid inlet and the liquid outlet of the first filter tank 100 are closed, and the feed inlet is open. The first filter tank 100 is in the first state at this time, that is, the filter material in the first filter tank 100 is in the regeneration state, and the second filter tank 200 is in the filtering working state. Thus, the sewage is prevented from entering the inside of the first filter tank 100 through the liquid inlet thereof, and the sodium sulfate solution is caused to enter the first filter tank 100 through the feed inlet so as to cause the filter material inside the first filter tank 100 to enter the regeneration procedure. At this time, the sewage enters the inside of the second filter tank 200 through the liquid inlet thereof, and the sewage is filtered by the filter material in the first filter tank 100 and then discharged through the liquid outlet, so as to realize the filtration of the sewage and ensure that the sewage can be treated during the regeneration of the filter material in the first filter tank 100.

[0037] The number of the second filter tanks 200 is N, and N satisfies N≥1. When N>1, the remaining second filter tanks 200 are connected in series in the first state.

[0038] In some embodiments, the second filter tank 200 has a plurality of, which can be understood as that, in practice, the number of the second filter tank 200 can be 1, 2, 3, 4, 5, etc. In the embodiment, N is 2, that is, the second filter tank 200 has two, and the following content is described and explained on the basis that the second filter tank 200 has two.

[0039] In one embodiment, when the first filter tank 100 is in the first state, the two second filter tanks 200 are connected in series. The two second filter tanks 200 can be denoted as filter tank a and filter tank b here. The series connection here can be understood as that the liquid outlet of the filter tank a is communicated with the liquid inlet of the filter tank b. The sewage first enters the filter tank a for filtration, the filtered water then enters the filter tank b for filtration, and the completely filtered water is discharged through the liquid outlet of the filter tank b, so as to realize double filtration treatment and make the water meet the discharge requirements.

[0040] The first filter tank 100 also has a second state, in which the liquid inlet and the liquid outlet of the first filter tank 100 are both opened, the liquid inlet of the first filter tank 100 is closed, the liquid inlet and the liquid outlet of the second filter tank 200 are closed, and the feeding inlet of the second filter tank 200 is opened.

[0041] It can be understood that when N is 1, that is, the number of the second filter tank 200 is one, when the first filter tank 100 is in the second state, the first filter tank 100 processes sewage, and the second filter tank 200 injects sodium sulfate solution to regenerate, so that the first filter tank 100 and the second filter tank 200 alternately process sewage and regenerate, thereby prolonging the service life of the filter material and improving the efficiency of sewage treatment.

[0042] When N>1, the liquid inlet and the liquid outlet of at least one second filter tank 200 are closed and the feeding inlet is opened, the liquid inlet and the liquid outlet of the remaining second filter tanks 200 are both opened, the feeding inlet of the remaining second filter tanks 200 is closed, the liquid inlet and the liquid outlet of the first filter tank 100 are opened, the feeding inlet of the first filter tank 100 is closed, and the remaining second filter tanks 200 are in series communication with the first filter tank 100.

[0043] Please refer to Figure 2 and Figure 3 In the present embodiment, the number of N is 2, that is, the number of the second filter tank 200 is two, as described above, here the second filter tank 200 is marked as filter tank a and filter tank b.

[0044] Please refer to Figure 2 As an example, the feeding inlet of the filter tank a is opened, the liquid inlet and the liquid outlet of the filter tank a are closed, the feeding inlet of the filter tank b is closed, the liquid inlet and the liquid outlet of the filter tank b are opened, the liquid outlet of the filter tank b is in communication with the liquid inlet of the first filter tank 100, sewage enters the filter tank b from the liquid inlet of the filter tank b for primary treatment, then the primary treated water enters the first filter tank 100 from the liquid inlet of the first filter tank 100 for secondary treatment, and finally is discharged from the liquid outlet of the first filter tank 100; or, the liquid outlet of the first filter tank 100 is in communication with the liquid inlet of the filter tank b, sewage enters the first filter tank 100 from the liquid inlet of the first filter tank 100 for primary treatment, and is treated again by entering the filter tank b from the liquid inlet of the filter tank b, and finally is discharged from the liquid outlet of the filter tank b. In the present embodiment, the former scheme is adopted, that is, the filter tank b liquid inlet enters sewage, and the liquid outlet of the first filter tank 100 discharges treated water.

[0045] The feeding inlet is provided with a first feeding pipe 300, and the first feeding pipe 300 comprises a second feeding pipe 310 and a first valve body 320, the first valve body 320 is installed on the second feeding pipe 310, and the first valve body 320 is used for on-off of the second feeding pipe 310 and the feeding inlet.

[0046] Please refer to Figures 1 to 3 As shown, in order to be able to inject sodium sulfate solution into the first filter tank 100, filter tank a and filter tank b, the first filter tank 100, filter tank a and filter tank b are all communicated with the second feed pipe 310, the three second feed pipes 310 are fed by a common pipeline, and the first valve body 320 is installed on each second feed pipe 310. The sodium sulfate solution enters the first filter tank 100, filter tank a or filter tank b through the first valve body 320, for example, when it is needed to inject sodium sulfate solution into the first filter tank 100, the first valve body 320 at the position of the first filter tank 100 is controlled to open the channel of the second feed pipe 310, at this time the sodium sulfate solution will be injected into the first filter tank 100 through the second feed pipe 310, and the filter tank a and the filter tank b are injected with sodium sulfate solution in the same way as the first filter tank 100, which will not be described in detail here.

[0047] The first filter tank 100 is provided with a first liquid inlet pipe 110, and the first liquid inlet pipe 110 is provided with a first liquid inlet valve 111 for controlling the opening and closing of the first liquid inlet pipe 110 and the first filter tank 100. The outlet of the first liquid inlet pipe 110 is communicated with a first liquid outlet pipe 120, and the first liquid outlet pipe 120 is provided with a first liquid outlet valve 121 for controlling the opening and closing of the first liquid outlet pipe 120 and the first liquid inlet pipe 110.

[0048] The second filter tank 200 is provided with a second liquid inlet pipe 210, which is communicated with the first liquid outlet pipe 120. The second liquid inlet pipe 210 is provided with a second liquid inlet valve 211 for controlling the opening and closing of the second liquid inlet pipe 210 and the second filter tank 200. The outlet of the second filter tank 200 is communicated with a second liquid outlet pipe 220, and the second liquid outlet pipe 220 is provided with a second liquid outlet valve 221 for controlling the opening and closing of the second liquid outlet pipe 220 and the second filter tank 200.

[0049] Please continue to refer to Figures 1 to 3 As shown, in order to control whether the sewage enters the first filter tank 100, filter tank a and filter tank b, and whether it is discharged from the first filter tank 100, filter tank a and filter tank b, a valve body is installed at each liquid inlet and liquid outlet position. Specifically, the first liquid inlet valve 111 controls whether the sewage enters the first filter tank 100, the two second liquid inlet valves 211 control whether the sewage enters the filter tank a and the filter tank b, the first liquid outlet valve 121 controls whether the filtered water is discharged from the first filter tank 100, and the two second liquid outlet valves 221 control whether the filtered water is discharged from the filter tank a and the filter tank b, achieving precise control.

[0050] The sewage treatment device further comprises a liquid supply pipe 400, which is in communication with a first pipe body 410 in communication with the first liquid inlet pipe 110 and a second pipe body 420 in communication with the second liquid inlet pipe 210. The second pipe body 420 is provided with a third valve body 421 for controlling the communication between the liquid supply pipe 400 and the second liquid inlet pipe 210. The first pipe body 410 is provided with a second valve body 411 for controlling the communication between the liquid supply pipe 400 and the first liquid inlet pipe 110.

[0051] Please refer to Figures 1 to 3 When sewage needs to be supplied to the first filter tank 100, the third valve body 421 on the second pipe body 420 is closed to prevent the sewage from entering the filter tank a and the filter tank b. When the filter tank a or the filter tank b needs to be supplied with sewage, the first pipe body 410 is closed to prevent the sewage from entering the first filter tank 100. At this time, the third valve body 421 at the position of the filter tank a or the filter tank b is opened, and the second liquid inlet valve 211 is opened, so that the sewage can enter the filter tank a or the filter tank b through the passage formed by the liquid supply pipe 400, the second pipe body 420 and the second liquid inlet pipe 210.

[0052] When the number of the second filter tank 200 is one, the sewage treatment device further comprises a first liquid discharge pipe 510, which is in communication with a first connecting pipe 520 in communication with the first liquid outlet pipe 120 and a second connecting pipe 530 in communication with the second liquid outlet pipe 220. The first connecting pipe 520 and the second connecting pipe 530 are provided with a fourth valve body 540.

[0053] In the embodiment, the passage formed by the first connecting pipe 520 and the first liquid discharge pipe 510 is used to discharge the water from the first filter tank 100. The passage formed by the second connecting pipe 530 at the position of the second filter tank 200 and the first liquid discharge pipe 510 is used to discharge the water from the second filter tank 200.

[0054] When the number of the second filter tank 200 is two, in the embodiment, the filter tank a is located on the side of the first filter tank 100 and close to the first filter tank 100, i.e. the filter tank a is located between the first filter tank 100 and the filter tank b. The second liquid outlet pipe 220 of the filter tank b is further connected with a first liquid return pipe 600 and a second liquid discharge pipe 700. The second liquid discharge pipe 700 is provided with a sixth valve body 710 for controlling the communication between the second liquid discharge pipe 700 and the filter tank b. The second liquid discharge pipe 700 is used to discharge the filtered water from the filter tank b.

[0055] When the number of the second filter tank 200 is two, the second liquid outlet pipe 220 is communicated with the first liquid return pipe 600, that is, the second liquid outlet pipe 220 of the filter tank b is communicated with the first liquid return pipe 600, and the first liquid return pipe 600 is provided with the second liquid return pipe 610 communicated with the first liquid inlet pipe 110 at the end away from the second liquid outlet pipe 220, and the fifth valve body 611 is arranged on the first liquid return pipe 600.

[0056] Please refer to Figures 1 to 3 When the first filter tank 100 is in the first state, the second valve body 411, the first liquid inlet valve 111 and the first liquid outlet valve 121 are in the closed state at this time. In order to regenerate the filler in the first filter tank 100, the first valve body 320 at the position of the first filter tank 100 is opened at this time, and the first valve body 320 at the positions of the filter tank a and the filter tank b is closed to prevent the sodium sulfate solution from entering the filter tank a and the filter tank b. The sodium sulfate from the second liquid inlet pipe 310 enters the first filter tank 100 to regenerate the filler. The route of the sodium sulfate entering the first filter tank 100 can be referred to the L2 route in Figure 1 When the first filter tank 100 is in the first state, the second valve body 411, the first liquid inlet valve 111 and the first liquid outlet valve 121 are in the closed state at this time. In order to regenerate the filler in the first filter tank 100, the first valve body 320 at the position of the first filter tank 100 is opened at this time, and the first valve body 320 at the positions of the filter tank a and the filter tank b is closed to prevent the sodium sulfate solution from entering the filter tank a and the filter tank b. The sodium sulfate from the second liquid inlet pipe 310 enters the first filter tank 100 to regenerate the filler. The route of the sodium sulfate entering the first filter tank 100 can be referred to the L2 route in Figure 1 When the first filter tank 100 is in the first state, the second valve body 411, the first liquid inlet valve 111 and the first liquid outlet valve 121 are in the closed state at this time. In order to regenerate the filler in the first filter tank 100, the first valve body 320 at the position of the first filter tank 100 is opened at this time, and the first valve body 320 at the positions of the filter tank a and the filter tank b is closed to prevent the sodium sulfate solution from entering the filter tank a and the filter tank b. The sodium sulfate from the second liquid inlet pipe 310 enters the first filter tank 100 to regenerate the filler. The route of the sodium sulfate entering the first filter tank 100 can be referred to the L2 route in

[0057] Please refer to Figure 2 and Figure 3 When the first filter tank 100 is in the second state, that is, the filler in the filter tank a or the filter tank b is regenerated, and the first filter tank 100 filters the sewage.

[0058] For example, please refer to Figure 2As shown, when the first filter 100 is in the second state, the packing material in filter a is regenerated. At this time, filter b and the first filter 100 are connected in series. The second inlet valve 211 and the second outlet valve 221 of filter a are closed, thereby cutting off the connection with the first filter 100 and filter b. The first valve body 320 at the position of filter a is opened, and the first valve body 320 at the positions of filter b and the first filter 100 is closed, allowing the sodium sulfate solution to enter filter a. This circuit can be referenced. Figure 2 In the L5 line, to connect filter b and the first filter 100, the second valve body 411, the sixth valve body 710, the fourth valve body 540 at filter a, and the third valve body 421 at filter a are closed. The third valve body 421 at filter b, the second inlet valve 211 at filter b, the second outlet valve 221 at filter b, the first inlet valve 111, and the first outlet valve 121 are open. At this time, wastewater flows through the pathway consisting of the supply pipe 400, the second pipe body 420 at filter b, the second inlet pipe 210 at filter b, the second outlet pipe 220 at filter b, the first return pipe 600, the second return pipe 610, the first inlet pipe 110, the first outlet pipe 120, the first connecting pipe 520 at filter b, and the first drain pipe 510. This path can be referenced. Figure 2 In the L4 path, sewage passes through filter tank b and the first filter tank 100 to the first drain pipe 510 for discharge, thereby achieving dual filtration of sewage and ensuring that the water meets the discharge requirements.

[0059] For example, see Figure 3 As shown, when the first filter 100 is in the second state, the packing material in filter b can be regenerated. At this time, the first filter 100 and filter a are connected in series. To enable the regeneration of filter b and allow the sodium sulfate solution to enter filter b, the first valve 320 at both the first filter 100 and filter a is closed, as are the second inlet pipe 210 and the second outlet pipe 220 at filter b. Then, the first valve 320 at filter b is opened, and the sodium sulfate solution enters filter b through the second inlet pipe 310 at filter b. The liquid level at this time can be referenced... Figure 3The path shown in L8. At this time, the first filter tank 100 is connected in series with the filter tank a. In order to realize the series connection without hindering the regeneration of the filler in the filter tank b, the second pipe body 420 at the positions of the filter tank a and the filter tank b are closed, and the fifth valve body 611 and the fourth valve body 540 at the filter tank a are also closed. The first pipe body 410, the first liquid inlet valve 111, the first liquid outlet valve 121, the second liquid inlet valve 211 at the filter tank a, the second liquid outlet valve 221 at the filter tank a, and the second connecting pipe 530 at the filter tank a are opened. At this time, the sewage is discharged through the path formed by the first pipe body 410, the first liquid inlet pipe 110, the first liquid outlet pipe 120, the second liquid inlet pipe 210, the second liquid outlet pipe 220, the second connecting pipe 530 at the filter tank a, and the first liquid outlet pipe 510. For reference, please see Figure 3 The path L7.

[0060] Please continue to see Figures 1 to 3 Further, in order to be able to clean the first filter tank 100 and the filter tank a and the filter tank b, specifically, a flushing liquid inlet pipe 810 and a flushing liquid outlet pipe 830 are installed on the first filter tank 100, the filter tank a and the filter tank b, and a flushing liquid inlet valve 820 is installed on the flushing liquid inlet pipe 810, and a flushing liquid outlet valve 840 is installed on the flushing liquid outlet pipe 830.

[0061] In one embodiment, when the filler in the first filter tank 100 needs to be regenerated, the flushing liquid inlet valve 820 and the flushing liquid outlet pipe 830 can be opened first, and the cleaning liquid enters the first filter tank 100 through the flushing liquid inlet pipe 810, and then is discharged from the flushing liquid outlet pipe 830. The path can be referred to as the path L3 in Figure 1 After cleaning is completed, the regeneration program of the first filter tank 100 is performed.

[0062] In one embodiment, when the filler in the filter tank a needs to be regenerated, the flushing liquid inlet valve 820 and the flushing liquid outlet pipe 830 at the filter tank a can be opened first, and the cleaning liquid enters the filter tank a through the flushing liquid inlet pipe 810, and then is discharged from the flushing liquid outlet pipe 830. The path can be referred to as the path L6 in Figure 2 After cleaning is completed, the regeneration program of the filter tank a is performed.

[0063] In one embodiment, when the filler in the filter tank b needs to be regenerated, the flushing liquid inlet valve 820 and the flushing liquid outlet pipe 830 at the filter tank b can be opened first, and the cleaning liquid enters the filter tank b through the flushing liquid inlet pipe 810, and then is discharged from the flushing liquid outlet pipe 830. The path can be referred to as the path L9 in Figure 3 After cleaning is completed, the regeneration program of the filter tank a is performed.

[0064] The embodiment of the present application further provides a sewage treatment system, which comprises the sewage treatment device described above, and further comprises a plurality of water pumps, which are used for conveying the sodium sulfate solution and the sewage, and realizing the flow of the sodium sulfate and the sewage.

[0065] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0066] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A sewage treatment apparatus characterised in that, The utility model relates to a filter system, comprising: a first filter tank (100); a second filter tank (200), the first filter tank (100) and the second filter tank (200) each have a liquid inlet, a liquid outlet and a feed inlet, the first filter tank (100) has at least a first state, in the first state, the liquid inlet and the liquid outlet of the first filter tank (100) are closed, the feed inlet of the first filter tank (100) is open, the liquid inlet and the liquid outlet of the second filter tank (200) are open, and the feed inlet of the second filter tank (200) is closed.

2. The sewage treatment device according to claim 1, characterized in that, The number of the second filter tank (200) is N, satisfying N>=1, when N>1, in the first state, the remaining second filter tanks (200) are connected in series.

3. The sewage treatment device according to claim 2, characterized in that The first filter tank (100) also has a second state, in the second state, the liquid inlet and the liquid outlet of the first filter tank (100) are open, the liquid inlet of the first filter tank (100) is closed, the liquid inlet and the liquid outlet of the second filter tank (200) are closed, and the feed inlet of the second filter tank (200) is open; When N>1, the liquid inlet and the liquid outlet of at least one of the second filter tanks (200) are closed and the feed inlet is open, the liquid inlet and the liquid outlet of the remaining second filter tanks (200) are open, the feed inlet of the remaining second filter tanks (200) is closed, the liquid inlet and the liquid outlet of the first filter tank (100) are open, the feed inlet of the first filter tank (100) is closed, and the remaining second filter tanks (200) are connected in series with the first filter tank (100).

4. The sewage treatment device of claim 1, wherein The feed inlet is provided with a first feed pipe (300), the first feed pipe (300) comprises a second feed pipe (310) and a first valve body (320), the first valve body (320) is installed on the second feed pipe (310), and the first valve body (320) is used for on-off connection of the second feed pipe (310) and the feed inlet.

5. The sewage treatment device of claim 1, wherein The liquid inlet of the first filter tank (100) is provided with a first liquid inlet pipe (110), the first liquid inlet pipe (110) is provided with a first liquid inlet valve (111), the first liquid inlet valve (111) is used for controlling on-off connection of the first liquid inlet pipe (110) and the first filter tank (100), and the outlet of the first liquid inlet pipe (110) is in communication with a first liquid outlet pipe (120), the first liquid outlet pipe (120) is provided with a first liquid outlet valve (121), and the first liquid outlet valve (121) is used for controlling on-off connection of the first liquid outlet pipe (120) and the first liquid inlet pipe (110).

6. The sewage treatment device of claim 5, wherein The liquid inlet of the second filter tank (200) is communicated with a second liquid inlet pipe (210) which is communicated with the first liquid outlet pipe (120), and the second liquid inlet pipe (210) is provided with a second liquid inlet valve (211) for controlling the communication between the second liquid inlet pipe (210) and the second filter tank (200), and the liquid outlet of the second filter tank (200) is communicated with a second liquid outlet pipe (220) which is provided with a second liquid outlet valve (221) for controlling the communication between the second liquid outlet pipe (220) and the second filter tank (200).

7. The sewage treatment device of claim 6, wherein The sewage treatment device further comprises a liquid supply pipe (400) which is communicated with a first pipe body (410) communicated with the first liquid inlet pipe (110) and a second pipe body (420) communicated with the second liquid inlet pipe (210), and the second pipe body (420) is provided with a third valve body (421) for controlling the communication between the liquid supply pipe (400) and the second liquid inlet pipe (210), and the first pipe body (410) is provided with a second valve body (411) for controlling the communication between the liquid supply pipe (400) and the first liquid inlet pipe (110).

8. The sewage treatment device of claim 6, wherein The sewage treatment device further comprises a first liquid discharge pipe (510) which is communicated with a first connecting pipe (520) communicated with the first liquid outlet pipe (120) and a second connecting pipe (530) communicated with the second liquid outlet pipe (220), and the first connecting pipe (520) and the second connecting pipe (530) are provided with a fourth valve body (540).

9. The sewage treatment device of claim 6, wherein, The second liquid outlet pipe (220) is communicated with a first liquid return pipe (600) which is provided with a second liquid return pipe (610) communicated with the first liquid inlet pipe (110) at a direction away from the second liquid outlet pipe (220), and the first liquid return pipe (600) is provided with a fifth valve body (611).

10. A sewage treatment system characterised in that, The sewage treatment device comprises the sewage treatment device according to any one of claims 1 to 9. The sewage treatment device comprises the sewage treatment device according to any one of claims 1 to 9.

Images