Liquid recycling system

Abstract

The invention provides a liquid recycling system. The liquid recycling system comprises a liquid treatment module and a buffer module, the liquid treatment module comprises a liquid treatment tank and a state monitoring assembly, the liquid treatment tank is connected with the to-be-purified liquid supply module and used for purifying the to-be-purified liquid, the state monitoring assembly is used for monitoring the running state of the liquid treatment tank, and the running state comprises a flushing state and a non-flushing state; the buffer module comprises a buffer container and a first liquid level monitor, and the buffer container is connected with the liquid treatment module and used for storing purified liquid output by the liquid treatment module; the first liquid level monitor is used for monitoring the liquid level of the purified liquid in the buffer container. According to the liquid recycling system, the occupied area can be reduced, the purification process is simplified, the recycling efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy projects, and particularly to a liquid recycling system. Background Art

[0002] With the global warming and severe drought, water resources are becoming increasingly scarce, and the collection and utilization of wastewater have received more and more attention. However, the existing wastewater recycling equipment has a large floor area, a complex purification process, a low recycling efficiency, and a high cost.

[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present invention, and thus it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] A main object of the present invention is to provide a liquid recycling system, which can reduce the floor area, simplify the purification process, improve the recycling efficiency, and reduce the cost.

[0005] To achieve the above object, the present invention provides a liquid recycling system, including a liquid treatment module and a buffer module. Among them, the liquid treatment module includes a liquid treatment tank and a status monitoring component. The liquid treatment tank is used for purifying the to-be-purified liquid, and the status monitoring component is used for monitoring the operating status of the liquid treatment tank. The operating status includes a flushing status and a non-flushing status; the buffer module includes a buffer container and a first liquid level monitor. The buffer container is connected to the liquid treatment module and is used for storing the purified liquid output by the liquid treatment module; the first liquid level monitor is used for monitoring the liquid level of the purified liquid in the buffer container.

[0006] In some embodiments of the present invention, the liquid recycling system further includes: a flushing module, connected to the liquid treatment tank and the buffer container, and used for flushing the liquid treatment tank with the purified liquid in the buffer container when the liquid treatment tank is in the flushing status. Among them, the flushing module includes: a liquid flushing pipeline, connected to the buffer container and the liquid treatment tank, and used for providing the purified liquid as a flushing liquid when the liquid treatment tank is in the flushing status; a gas flushing pipeline, communicating with the liquid treatment tank, and the gas flushing pipeline is connected to an air pump and is used for providing flushing gas when the liquid treatment tank is in the flushing status.

[0007] In some embodiments of the present invention, the liquid treatment tank includes: an outer treatment chamber and an inner treatment chamber. The outer treatment chamber is used for pre-purifying the to-be-purified liquid, and filter media are provided in the inner treatment chamber for filtering the to-be-purified liquid that has been pre-purified.

[0008] In some embodiments of the present invention, the liquid flushing pipeline and the gas flushing pipeline are respectively connected to the bottom of the inner treatment chamber of the liquid treatment tank for backwashing the filter media in the inner treatment chamber; the flushing module further includes a first drainage pipeline connected to the top of the inner treatment chamber for discharging the flushing liquid after flushing.

[0009] In some embodiments of the present invention, the status monitoring component includes: a first pressure monitor disposed at the top of the inner treatment chamber of the liquid treatment tank for monitoring the first pressure value of the liquid to be purified above the filter media in the inner treatment chamber, so as to indicate the operating status of the liquid treatment tank.

[0010] In some embodiments of the present invention, the status monitoring component further includes: a second pressure monitor disposed at the bottom of the inner treatment chamber of the liquid treatment tank for monitoring the second pressure value of the purified liquid that has passed through the filter media below the filter media in the inner treatment chamber, and the first pressure value and the second pressure value are used to indicate the operating status of the liquid treatment tank.

[0011] In some embodiments of the present invention, the liquid treatment module further includes: a pre-purifying agent adding device connected to the liquid treatment tank for adding a pre-purifying agent to the liquid to be purified flowing into the liquid treatment tank.

[0012] In some embodiments of the present invention, the liquid treatment module further includes: a first pollution detector disposed in the pipeline connecting the liquid treatment tank and the buffer container for monitoring the first pollution value of the purified liquid.

[0013] In some embodiments of the present invention, the liquid treatment module further includes: a second drainage pipeline connected to the liquid treatment tank for discharging the purified liquid with a first pollution value greater than a preset pollution value.

[0014] In some embodiments of the present invention, the liquid treatment module further includes: an auxiliary purifying agent adding device disposed in the pipeline connecting the liquid treatment tank and the buffer container for adding an auxiliary purifying agent to the purified liquid flowing out of the liquid treatment tank.

[0015] In some embodiments of the present invention, the liquid treatment tank further includes a liquid to be purified supply module, including: a raw liquid pool for storing the liquid to be purified, and the raw liquid pool is connected to the liquid treatment tank through a pipeline; a liquid supply pump group connected to the raw liquid pool for outputting the liquid to be purified in the raw liquid pool.

[0016] In some embodiments of the present invention, the liquid to be purified supply module further includes: a second pollution detector, disposed in the pipeline connecting the stock solution tank and the liquid treatment tank, for monitoring the second pollution value of the liquid to be purified flowing into the liquid treatment tank.

[0017] In some embodiments of the present invention, the liquid to be purified supply module further includes: a third drain pipeline, connected to the stock solution tank, for discharging the liquid to be purified with the second pollution value greater than the pollution threshold.

[0018] In some embodiments of the present invention, the liquid to be purified supply module further includes: a third electric valve, disposed in the third drain pipeline, for opening or closing the third drain pipeline; the liquid treatment module further includes: a fourth electric valve, disposed in the pipeline connecting the stock solution tank and the liquid treatment tank, for opening or closing the liquid inlet end of the liquid treatment tank.

[0019] In some embodiments of the present invention, the liquid to be purified supply module further includes: a second liquid level monitor, for monitoring the liquid level of the liquid to be purified in the stock solution tank.

[0020] In some embodiments of the present invention, the liquid to be purified supply module further includes: an evacuation pump set, connected to the stock solution tank, for discharging the liquid to be purified in the stock solution tank when the liquid level of the liquid to be purified in the stock solution tank is lower than the liquid supply level threshold.

[0021] In some embodiments of the present invention, the liquid treatment system further includes: a liquid replenishment module, connected to the buffer container, the liquid replenishment module has a reserved interface, and the reserved interface is used to connect to a purified liquid supply device for replenishing the buffer container with external purified liquid.

[0022] In some embodiments of the present invention, the liquid replenishment module includes: a second flow monitor, disposed in the pipeline connecting the liquid replenishment module and the purified liquid supply device, for monitoring the flow rate of the external purified liquid replenished into the buffer container; and / or, a third pressure monitor, disposed in the pipeline connecting the liquid replenishment module and the purified liquid supply device, for monitoring the pressure value of the external purified liquid replenished into the buffer container.

[0023] In some embodiments of the present invention, the liquid treatment system further includes: a purified liquid output module, connected to the buffer container, for outputting the purified liquid in the buffer container, and the purified liquid output module includes a booster pump set for boosting the purified liquid output module.

[0024] In some embodiments of the present invention, the liquid treatment system further includes: a controller, electrically connected to the liquid treatment module and the buffer module respectively, for controlling the liquid treatment tank to purify the liquid to be purified and controlling the opening and closing of the buffer module.

[0025] In some embodiments of the present invention, the liquid treatment system further includes: a housing, in which the liquid treatment module, the buffer module and the flushing module are all arranged; the housing is provided with a pipeline interface for connecting the pipelines inside the housing to the external pipelines.

[0026] In some embodiments of the present invention, the floor area of the liquid reuse system satisfies the following relationship: A ≤ 0.6Q / H + 0.78Q; where A represents the floor area of the liquid reuse system, in square meters 2 ; Q represents the volume flow rate of the liquid to be purified flowing in per unit time, in cubic meters per hour 3 / h; H represents the height of the liquid treatment tank, in meters.

[0027] From the above technical solutions, it can be seen that the present invention has at least one of the following advantages and positive effects:

[0028] In the embodiments of the present invention, the liquid to be purified can be purified by the treatment tank in the liquid treatment module, without separately setting different purification treatment devices for the purification treatment in different stages, reducing the complexity of the liquid recovery system, reducing the floor area of the liquid recovery system, simplifying the purification process and improving the recovery efficiency. Due to the improvement of the recovery efficiency, the purified liquid purified by the liquid treatment tank is stored in the buffer container, and the liquid level of the purified liquid in the buffer container is monitored in real time by the first liquid level monitor, so that the purification treatment of the liquid treatment tank can be started or stopped in time to realize the purification treatment of the liquid to be purified on demand, without storing all the liquid to be purified in a large storage tank after purification treatment, thereby saving energy consumption, further reducing the occupied area of the system and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By referring to the accompanying drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present invention will become more obvious.

[0030] Figure 1 A block diagram of a liquid reuse system shown according to some exemplary embodiments of the present invention;

[0031] Figure 2 A structural block diagram of a liquid reuse system shown according to some exemplary embodiments of the present invention;

[0032] Figure 3 A sectional view of a liquid treatment tank shown according to some exemplary embodiments of the present invention;

[0033] Figure 4 A block diagram of a liquid reuse system shown according to some exemplary embodiments of the present invention;

[0034] Figure 5 A three-dimensional schematic diagram of a liquid reuse system with a housing shown according to some exemplary embodiments of the present invention.

[0035] Explanation of reference numerals:

[0036] 100, liquid to be purified supply module; 101, raw liquid tank; 102, liquid supply pump group; 103, second relay; 104, second pollution detector; 105, third drain pipeline; 106, third electric valve; 107, second liquid level monitor; 108, evacuation pump group; 109, third relay; 200, liquid treatment module; 201, liquid treatment tank; 2011, first liquid inlet; 2012, second liquid inlet; 2013, first filter plate; 2014, filter media; 2015, first liquid outlet; 2016, outer peripheral wall; 2017, inner peripheral wall; 2018, top wall; 2019, bottom wall; S1, outer treatment chamber; S2, inner treatment chamber; 2020, third liquid inlet; 2021, intake pipe; 2022, second liquid outlet; 202, pre-purifying agent adding device; 203, first pollution detector; 204, auxiliary purifying agent adding device; 205, first flow monitor; 206, second drain pipeline; 207, first electric valve; 208, second electric valve; 209, first pressure monitor; 210, second pressure monitor; 211, fourth electric valve; 300, buffer module; 301, buffer container; 302, first liquid level monitor; 400, flushing module; 401, liquid flushing pipeline; 402, gas flushing pipeline; 403, fifth electric valve; 404, third flow monitor; 405, air pump; 406, first relay; 407, first drain pipeline; 408, sixth electric valve; 500, liquid supplement module; 501, second flow monitor; 502, third pressure monitor; 503, seventh electric valve; 600, purified liquid output module; 601, booster pump group; 602, infusion pipeline; 603, user end; 700, controller; 800, housing; X, horizontal direction; Y, axial direction. Specific embodiments

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.

[0038] In the following description of different exemplary embodiments of the present invention, reference is made to the accompanying drawings which form a part of the present invention and in which are shown, by way of example, different exemplary structures, systems and steps for implementing various aspects of the present invention. It should be understood that other specific arrangements of components, structures, exemplary devices, systems and steps may be used and structural and functional modifications may be made without departing from the scope of the present invention. Also, although terms such as "above", "between", "within" etc. may be used in this specification to describe different exemplary features and elements of the present invention, these terms are used herein for convenience only, e.g., according to the orientation of the examples in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure to fall within the scope of the present invention. In addition, technical terms such as "first", "second", etc. are used only as labels and are not numerical limitations on their objects.

[0039] As Figure 1 shown, an embodiment of the present invention provides a liquid reuse system, including a liquid treatment module 200 and a buffer module 300.

[0040] Among them, the liquid treatment module 200 includes a liquid treatment tank 201 and a status monitoring component. The liquid treatment tank 201 is used for purifying the liquid to be purified, and the status monitoring component is used for monitoring the operating status of the liquid treatment tank 201. The operating status includes a flushing status and a non-flushing status. The buffer module 300 includes a buffer container 301 and a first liquid level monitor 302. The buffer container 301 is connected to the liquid treatment module 200 and is used for storing the purified liquid output by the liquid treatment module 200. The first liquid level monitor 302 is used for monitoring the liquid level of the purified liquid in the buffer container 301.

[0041] As can be seen from the above, the purification of the liquid to be purified can be achieved through the liquid treatment tank 201 in the liquid treatment module 200, without separately setting different purification treatment devices for the purification treatments at different stages, reducing the complexity of the liquid recovery system, reducing the floor area of the liquid recovery system, simplifying the purification process, and improving the recovery efficiency. Due to the improvement of the recovery efficiency, the purified liquid after purification by the liquid treatment tank 201 is stored in the buffer container 301, and the liquid level of the purified liquid in the buffer container 301 is monitored in real time by the first liquid level monitor 302, so that the purification treatment of the liquid treatment tank 201 can be started or stopped in time to achieve the purification of the liquid to be purified as needed, without storing all the purified liquid in a large storage tank after purification, thereby saving energy consumption, further reducing the occupied area of the system, reducing costs, and avoiding secondary pollution of the purified liquid.

[0042] In an embodiment of the present invention, the liquid to be purified may be sewage, such as domestic sewage, industrial sewage, may also be rainwater, or may be contaminated oil substances, etc.

[0043] In some embodiments of the present invention, as Figure 3 shown, the liquid treatment tank 201 may include an outer treatment chamber S1 and an inner treatment chamber S2. The outer treatment chamber S1 is used for pre-purifying the liquid to be purified, and filter media 2014 is provided in the inner treatment chamber S2 for filtering the pre-purified liquid to be purified.

[0044] Continuing to refer to Figure 3 , the liquid treatment tank 201 includes a tank body, a first liquid inlet 2011, a second liquid inlet 2012, a first filter plate 2013, filter media 2014, and a first liquid outlet 2015. Among them, the tank body has an outer peripheral wall 2016, an inner peripheral wall 2017, a top wall 2018, and a bottom wall 2019 to form a closed tank body. An outer treatment chamber S1 is formed between the outer peripheral wall 2016 and the inner peripheral wall 2017, and the space surrounded by the inner peripheral wall 2017 forms an inner treatment chamber S2. The first liquid inlet 2011 is provided at the bottom of the outer peripheral wall 2016 and is connected to the outer treatment chamber S1 for inputting the liquid to be purified into the outer treatment chamber S1 for pre-purification treatment. The second liquid inlet 2012 is located at the top of the inner peripheral wall 2017 and is connected to the inner treatment chamber S2. As the liquid to be purified continuously enters the outer treatment chamber S1, the liquid to be purified continuously rises in the outer treatment chamber S1 during the pre-purification process until it reaches the second liquid inlet 2012, and then enters the inner treatment chamber S2 from the top of the inner peripheral wall 2017 through the second liquid inlet 2012.

[0045] The first filter plate 2013 is provided horizontally along the X direction at the bottom of the inner treatment chamber S2, and the filter media 2014 is provided in the inner treatment chamber S2 and is located on the first filter plate 2013. The first liquid outlet 2015 is provided on the bottom wall 2019 of the tank body and is connected to the inner treatment chamber S2 below the first filter plate 2013. After the pre-purified liquid to be purified enters the inner treatment chamber S2, it falls onto the filter media 2014 from top to bottom, and after being filtered by the filter media 2014, it flows downward through the first filter plate 2013 and is output through the first liquid outlet 2015.

[0046] It should be noted that in the embodiments of the present invention, the terms "upper", "lower", "inner", and "outer" are technical terms expressing directions. Taking the installation of the liquid treatment tank on the ground as an example, the direction away from the ground is upward. For example, the top wall 2018 of the liquid treatment tank is located above the bottom wall 2019, the first filter plate 2013 is located below the filter media 2014, and the liquid treatment tank has a central axis, and the direction away from the central axis is outward. For example, as Figure 3As shown, the outer peripheral wall 101 is located outside the inner peripheral wall 102, and the inner peripheral wall 102 is located inside the outer peripheral wall 101. These orientation terms are only for more clearly describing the structure and function of the liquid treatment tank and do not have a limiting meaning. In addition, in the embodiments of the present invention, "horizontal direction X" and "axial direction Y" also appear. Among them, the axial direction Y can be understood as the extension direction of the axis of the liquid treatment tank, and the horizontal direction X is the direction perpendicular to the axial direction Y.

[0047] The liquid treatment tank 201 of the embodiment of the present invention can simultaneously complete the pre-purification treatment (for example, flocculation treatment) and filtration treatment of the liquid to be purified. Compared with the related art, there is no need to separately set up a flocculation device and a sedimentation tank, so the volume of the equipment is reduced, and thus the floor area is reduced. By controlling the volume flow rate of the liquid to be purified per unit time, the residence time in the outer treatment chamber S1 can be controlled, and the required pre-purification result can be achieved, and then it is sent to the inner treatment chamber S2 for filtration treatment, without waiting for sedimentation and liquid feeding operations, simplifying the purification process, improving the recovery efficiency, and reducing the cost at the same time.

[0048] In the embodiments of the present invention, the diameter of the inner treatment chamber S2 satisfies the following relationship (1):

[0049]

[0050] where d represents the diameter of the inner treatment chamber S2, with the unit of m; Q represents the volume flow rate of the liquid to be purified flowing in per unit time, with the unit of m 3 / h; v represents the filtration rate, with the unit of m / h.

[0051] Taking the lowest filtration rate of 10 m / h, according to the above relationship (1), the diameter of the inner treatment chamber S2 of the embodiment of the present invention is:

[0052]

[0053] The filtration rate of the liquid treatment tank disclosed in the present invention is greater than or equal to 10 m / h. The value of the diameter of the inner treatment chamber S2 can be obtained according to the flow rate of the liquid to be purified per unit time and the above calculation relationship, so as to minimize the diameter of the inner treatment chamber S2 as much as possible to reduce the volume of the treatment tank, while still being able to filter a larger flow rate of the liquid to be purified and improve the purification efficiency.

[0054] In some embodiments, the diameter of the liquid treatment tank 201 satisfies the following relationship (2):

[0055]

[0056] where D represents the diameter of the liquid treatment tank 201, with the unit of m; Q represents the volume flow rate of the liquid to be purified flowing in per unit time, with the unit of m3 / h; t represents the time of pre-purification treatment, with the unit of h; d represents the diameter of the inner treatment chamber S2, with the unit of m; H represents the height of the liquid treatment tank, with the unit of m.

[0057] Among them, the difference between D and d is the radial dimension of the outer treatment chamber S1, which affects the volume of the outer treatment chamber S1. The larger the volume of the outer treatment chamber S1, the longer the residence time of the liquid to be purified with a certain volume flow rate (unit: m 3 / h) in the outer treatment chamber S1, and the longer the time for pre-purification treatment. For example, when the pre-purification treatment is flocculation treatment, the longer the residence time, the better the flocculation effect. The ratio of the volume of the outer treatment chamber S1 to the volume flow rate of the liquid to be purified is the residence time. Therefore, the residence time of the liquid to be purified in the outer treatment chamber S1 can be adjusted by adjusting the volume flow rate of the liquid to be purified or the radial dimension of the outer treatment chamber S1.

[0058] According to Using the above relationship (2), it can be obtained that:

[0059]

[0060] Through the above relationship, the diameter of the liquid treatment tank can be designed according to the flocculation time, the flow rate of the liquid to be purified, and the height of the liquid treatment tank, so as to reduce the floor area of the liquid treatment tank while improving the purification efficiency and purification effect.

[0061] The flocculation time (residence time) is set to achieve the optimal flocculation effect and filtration effect as much as possible. In some embodiments, the flocculation time can be 2 min, 3 min, 4 min, 5 min, 6 min. Taking the flocculation time of 6 min (0.1 h) as an example, according to Using the above relationship (2), it can be obtained that:

[0062]

[0063] In some embodiments, the floor area of the liquid reuse system conforms to the following calculation relationship (3):

[0064] A = 6D 2 (3)

[0065] Among them, A represents the floor area of the liquid treatment tank, with the unit of m 2 ; D represents the diameter of the liquid treatment tank, with the unit of m.

[0066] In the floor area of the liquid treatment tank, the length can be three times the diameter D of the tank body 1, and the width can be twice the diameter of the tank body 1. Since Therefore, A ≤ 0.6Q / H + 0.78Q. It can be seen therefrom that the floor area is related to the height of the tank body 1 and the flow rate of the liquid to be purified. Thus, the floor area of the tank body 1 can be designed according to the flow rate of the liquid to be purified and the height of the tank body 1, so as to minimize the floor area of the liquid treatment tank.

[0067] In some embodiments, the height H of the liquid treatment tank 201 is greater than 0.8 m. For example, the height of the liquid treatment tank is 1 m, 1.2 m, 1.5 m, 2 m, etc., and the diameter D of the liquid treatment tank is 0.2 m to 1.3 m. For example, in addition to the above two end values, the diameter D can be 0.5 m, 0.8 m, 1 m or 1.2 m. Those skilled in the art can set it according to the actual situation and no special limitation is made here.

[0068] As Figure 2 shown, the liquid treatment module 200 of the embodiment of the present invention may further include a pre-purifying agent adding device 202, which is connected to the liquid treatment tank 201 and is used for adding a pre-purifying agent to the liquid to be purified flowing into the liquid treatment tank 201.

[0069] Taking the liquid to be purified as recycled rainwater or sewage as an example, the pre-purifying agent can be a flocculant, such as aluminum sulfate. Before the liquid to be purified enters the liquid treatment tank 201, a flocculant can be added to the liquid to be purified (for example, the liquid to be purified contains 20 ppm of the flocculant). After the liquid to be purified flows in from the bottom of the outer treatment chamber S1, it forms a swirling flow and flows upward in a spiral. During the spiral flow, the flocculant and the liquid to be purified can be fully mixed and form flocs, and then enter the inner treatment chamber S2 for filtration treatment to form the purified liquid.

[0070] As Figure 2 shown, the liquid treatment module 200 of the embodiment of the present invention may further include a first pollution detector 203, which is arranged in the pipeline connecting the liquid treatment tank 201 and the buffer container 301 and is used for detecting the first pollution value of the purified liquid.

[0071] Among them, the first pollution detector 203 can be at least one of a turbidity detector, an organic pollutant detector, a bacteria detector and a heavy metal detector, so as to timely obtain the pollutant parameters of the purified liquid (for example, turbidity value, organic pollutant concentration value, bacteria concentration value, heavy metal concentration value) for evaluating the purification degree of the purified liquid. Those skilled in the art can select and set it according to the actual situation and no special limitation is made here.

[0072] As Figure 2 , the liquid treatment module 200 of the embodiment of the present invention further includes a pH detector (not shown in the figure), which is arranged in the pipeline connecting the liquid treatment tank 201 and the buffer container 301 and is used for monitoring the pH value of the purified liquid to timely obtain the pH value of the purified liquid.

[0073] As Figure 2 shown, the liquid treatment module 200 of the embodiment of the present invention may further include an auxiliary purifying agent adding device 204, which is arranged in the pipeline connecting the liquid treatment tank 201 and the buffer container 301, and is used to add an auxiliary purifying agent to the purified liquid flowing out of the liquid treatment tank 201.

[0074] Among them, the auxiliary purifying agent may be a disinfectant for disinfecting the purified liquid. Of course, the auxiliary purifying agent may also be other reagents, such as an acid-base neutralizing agent and a bactericidal agent. The acid-base neutralizing agent can be added according to the pH value of the purified liquid detected by the pH detector, and the bactericidal agent can be added according to the bacterial concentration value.

[0075] As Figure 2 shown, the liquid treatment module 200 of the embodiment of the present invention may further include a first flow monitor 205, which is connected to the liquid treatment tank 201 and is used to monitor the flow value of the liquid to be purified flowing into the liquid treatment tank 201.

[0076] The dosage of the disinfectant can be obtained according to the flow value of the liquid to be purified monitored by the first flow monitor 205 and the first pollution value of the purified liquid. The type and dosage of the acid-base neutralizing agent can also be obtained according to the flow value of the liquid to be purified and the pH value of the purified liquid, so that the auxiliary purifying agent adding device 204 adds an appropriate corresponding auxiliary purifying agent to the purified liquid.

[0077] Of course, the liquid treatment module 200 may further include another flow monitor (not shown in the figure), which can be arranged in the pipeline between the buffer container 301 and the liquid treatment tank 201 to monitor the flow of the purified liquid. Therefore, the type and dosage of the auxiliary purifying agent can be obtained according to the flow, the first pollution value, and the pH value of the purified liquid.

[0078] As Figure 2 shown, the liquid treatment module 200 of the embodiment of the present invention may further include a second drainage pipeline 206, which is communicated with the liquid treatment tank 201 and is used to discharge the purified liquid with a first pollution value greater than a preset pollution value.

[0079] Among them, the preset pollution value can be understood as a qualified pollution value, that is, when the first pollution value of the purified liquid is less than or equal to the preset pollution value, the purified liquid meets the standard for users to use. The preset pollution value can be set according to the user's use standard. When the pollution value of the purified liquid detected by the first pollution detector 203 is greater than the qualified pollution value, it means that it does not meet the user's use standard, and the purified liquid needs to be discharged from the second drainage pipeline 206.

[0080] As Figure 2As shown, the liquid processing module 200 of this embodiment of the present invention further includes a first electric valve 207 and a second electric valve 208. The first electric valve 207 is located in the pipeline connecting the liquid processing tank 201 and the buffer container 301, downstream of the first contamination detector 203, and is used to open or close the buffer container 301. The second electric valve 208 is located in the second liquid discharge pipeline 206 and is used to open or close the second liquid discharge pipeline 206.

[0081] When the first contamination value of the purified liquid detected by the first contamination detector 203 is less than or equal to the preset contamination value, the purified liquid meets the user's usage standards. The first electric valve 207 can be opened, which is equivalent to opening the buffer container 301. The purified liquid flowing out of the liquid treatment tank 201 is replenished into the buffer container 301 for user use. At this time, the second electric valve 208 is closed.

[0082] When the first contamination value is greater than the preset contamination value, the purified liquid needs to be discharged, and the second electric valve 208 is opened, which is equivalent to opening the second liquid discharge pipeline 206 to discharge the unqualified purified liquid out of the system. At this time, the first electric valve 207 is in a closed state.

[0083] As the number of purification times in the liquid treatment tank 201 increases, for example, after the flocculated liquid to be purified is filtered multiple times, flocculants may be mixed on the surface of the filter material 2014 or between the filter materials 2014, causing the filtration performance of the filter material 2014 to decrease and the filtration speed to decrease. Therefore, the filter material 2014 needs to be cleaned.

[0084] Based on this, Figure 2 As shown, the liquid recycling system of the embodiment of the present invention further includes a flushing module 400, which is connected to the liquid treatment tank 201 and the buffer container 301, and is used to flush the liquid treatment tank 201 with the purified liquid in the buffer container 301 when the liquid treatment tank 201 is in a flushing state.

[0085] That is, when the state monitoring component of the liquid processing module 200 detects that the liquid processing tank 201 meets the flushing condition, it indicates that the operating state of the liquid processing tank 201 is the flushing state, and the flushing module 400 starts to flush the liquid processing tank 201 .

[0086] like Figure 2 As shown, the state monitoring component of the embodiment of the present invention may include a first pressure monitor 209, which is arranged at the top of the inner treatment chamber S2 of the liquid treatment tank 201, and is used to monitor the first pressure value of the liquid to be purified located above the filter material 2014 in the inner treatment chamber S2, so as to indicate the operating state of the liquid treatment tank 201.

[0087] After the filter material 2014 has been filtered multiple times, the flocs coated on its surface and the flocs interspersed between the filter materials 2014 increase, resulting in a decrease in the filtration performance of the filter material 2014 and a decrease in the filtration speed. If the input rate of the liquid to be purified remains unchanged (i.e., the flow rate of the liquid to be purified input per unit time remains unchanged), the pressure of the liquid to be purified entering the inner treatment chamber S2 in the liquid treatment tank 201 will increase. The pressure of the liquid to be purified refers to the pressure of the liquid to be purified that has not yet been purified and enters the inner treatment chamber S2 in the liquid treatment tank 201. When the pressure of the liquid to be purified reaches a flushing pressure threshold, the liquid inlet speed will be too slow and the purification efficiency will be seriously reduced, indicating that the filtration performance of the filter material 2014 has seriously decreased and the filter material 2014 needs to be flushed. Among them, the flushing pressure threshold refers to the maximum allowable pressure value of the liquid to be purified in the liquid treatment tank 201. That is, if the pressure value of the liquid to be purified measured by the first pressure monitor 209 is greater than or equal to the pressure threshold, it means that the filtration efficiency of the filter material 2014 at this time is seriously reduced and is no longer suitable for filtration. The filter material 2014 needs to be flushed. Otherwise, the pressure continues to increase. In an extreme case, it may cause the liquid to be purified to be unable to be input into the liquid treatment tank 201.

[0088] In an embodiment of the present invention, by setting up a first pressure monitor 209, the pressure of the liquid to be purified in the inner processing chamber S2 can be monitored in real time. Once the pressure is detected to reach the flushing pressure threshold, it is considered that the liquid processing tank 201 is in a flushing state, and the ongoing purification process of the liquid processing tank 201 can be stopped, and the flushing module 400 can be turned on to flush the liquid processing tank 201.

[0089] like Figure 2 As shown, the state monitoring component of the embodiment of the present invention may also include a second pressure monitor 210, which is arranged at the bottom of the inner treatment chamber S2 of the liquid treatment tank 201, and is used to monitor the second pressure value of the filtered purified liquid located below the filter material 2014 in the inner treatment chamber S2. The first pressure value and the second pressure value are used to indicate the operating state of the liquid treatment tank 201.

[0090] The second pressure monitor 210 can monitor the pressure of the purified liquid below the filter material 2014 in real time. It can obtain the difference between the pressure value of the liquid to be purified monitored by the first pressure monitor 209 and the pressure value of the purified liquid monitored by the second pressure monitor 210. If the difference reaches the flushing pressure threshold, it is determined that the liquid treatment tank 201 is in a flushing state. The ongoing purification process in the liquid treatment tank 201 can be stopped, and the flushing module 400 can be activated to flush the liquid treatment tank 201. Compared with monitoring the pressure value of the liquid to be purified only through the first pressure monitor 209, using two pressure monitors to obtain the difference between the two pressures can more accurately determine whether to activate the flushing module 400 to flush the liquid treatment tank 201.

[0091] It should be noted that the liquid treatment tank 201 being in the flushing state does not strictly mean that the liquid treatment tank 201 is being flushed. It also includes the generation and transmission of information before flushing. For example, when the pressure value of the liquid to be purified is greater than or equal to the flushing pressure threshold, changing the status information can be understood as the liquid treatment tank 201 being in the flushing state, so as to be able to stop the purification treatment of the liquid treatment tank 201 in a timely manner.

[0092] In some embodiments, the first pressure monitor 209 and the second pressure monitor 210 can be any one of a pressure sensor, a liquid pressure gauge, and a liquid pressure meter, and those skilled in the art can select according to the actual situation. When the first pressure monitor 209 and the second pressure monitor 210 are both provided, the same type as described above can be selected for both of them to minimize the difference and improve the accuracy.

[0093] As Figure 2 As shown, the flushing module 400 of the embodiment of the present invention includes a liquid flushing pipeline 401, which is connected to the buffer container 301 and the liquid treatment tank 201, and is used to provide the purified liquid as the flushing liquid when the liquid treatment tank 201 is in the flushing state. Using the purified liquid in the buffer container 301 for flushing realizes the full utilization of the purified liquid.

[0094] As Figure 2 As shown, a fifth electric valve 403 and a third flow monitor 404 can also be provided in the liquid flushing pipeline 401. The fifth electric valve 403 is used to open and close the liquid flushing pipeline 401, and the third flow monitor 404 is used to monitor the flow rate of the purified liquid in the liquid flushing pipeline 401.

[0095] The first, second, and third flow monitors in the embodiment of the present invention can be any one of a flow sensor and a flow meter.

[0096] As Figure 2 As shown, the flushing module 400 of the embodiment of the present invention may further include a gas flushing pipeline 402, which is connected to the liquid treatment tank 201, and the gas flushing pipeline 402 is connected to an air pump 405 and is used to provide flushing gas when the liquid treatment tank 201 is in the flushing state.

[0097] By providing the gas flushing pipeline 402, during flushing, a flushing liquid of gas plus liquid is formed. The gas can provide a certain pressure, making the flushing liquid spread over a larger area and increasing the flushing force, cleaning the liquid treatment tank 201 more thoroughly, and at the same time saving the amount of flushing liquid used. In addition, since the gas can provide pressure, the pressure tank for providing pressure for the back flushing liquid can be omitted, further simplifying the liquid purification equipment, reducing the floor area, and simplifying the operation process.

[0098] In some embodiments, the air pump 405 may be included in the flushing module 400. In addition, the flushing module 400 may further include a first relay 406 connected to the air pump 405, and the first relay 406 is used to control the opening and closing of the air pump 405.

[0099] As Figure 2 shown, the liquid flushing pipeline 401 and the gas flushing pipeline 402 are respectively connected to the bottom of the inner processing chamber S2 of the liquid processing tank 201 for backwashing the filter material 2014 in the inner processing chamber S2.

[0100] As Figure 3 shown, the liquid processing tank 201 further includes a third liquid inlet 2020 provided on the bottom wall 2019 of the tank body and connected to the inner processing chamber S2. The liquid flushing pipeline 401 may be connected to the third liquid inlet 2020, so as to send the flushing liquid into the inner processing chamber S2 of the liquid processing tank 201 through the third liquid inlet 2020, and backwashing of the filter material 2014 can be realized to improve the cleaning effect of the filter material 2014.

[0101] As Figure 3 shown, the liquid processing tank 201 may further include an air inlet pipe 2021 provided in the inner processing chamber S2 below the first filter plate 2013 along the axial direction Y. The gas flushing pipeline 402 may be connected to the air inlet pipe 2021 for providing backwashing gas to the liquid processing tank 201. Alternatively, the liquid processing tank 201 may also have an air inlet opened on the bottom wall 2019 of the tank body, and the gas flushing pipeline 402 may be connected to the air inlet for providing backwashing gas.

[0102] Taking Figure 3 the structure of the liquid processing tank 201 as an example, when backwashing it, a gas-plus-liquid backwashing liquid is formed, so that the backwashing liquid can spread over a larger area and increase the backwashing force, blowing the filter material 2014 fluffy and making it roll, so that the filter material 2014 can be cleaned more thoroughly, and at the same time, the consumption of the liquid in the backwashing liquid is saved.

[0103] In some embodiments, the filter material 2014 in the liquid processing tank 201 may be at least one of comet fiber filter material and activated carbon. In the embodiments of the present invention, using comet fiber filter material or activated carbon filter material can not only improve the filtration speed, but also perform backwashing, which not only improves the service life of the filter material 2014, but also improves the processing efficiency of the liquid processing tank 201. The filtration speed in the embodiments of the present invention can reach 80 m / h.

[0104] Of course, the structure of the liquid processing tank 201 in the embodiments of the present invention may not be limited to Figure 3The structure shown in the figure, that is, the purification treatment of the liquid to be purified is not limited to the above-mentioned filtration treatment, and can also be oil removal treatment. In the liquid treatment tank 201, instead of setting the filter material 2014, an oil adsorbent or the like can be set. The above-mentioned backwashing can clean the oil adsorbent and the inner wall of the liquid treatment tank 201.

[0105] In addition, the liquid flushing pipeline 401 and the gas flushing pipeline 402 of the embodiment of the present invention can be alternately opened. In this way, the flushing liquid can be saved and a better backwashing effect can be achieved.

[0106] As Figure 2 shown, the flushing module 400 of the embodiment of the present invention can also include a first liquid discharge pipeline 407, which is connected to the top of the inner treatment chamber S2 and is used to discharge the flushing liquid after flushing. Connecting the first liquid discharge pipeline 407 to the top of the inner treatment chamber S2 can discharge the flushing liquid from the top of the liquid treatment tank 201, thereby avoiding the dirt in the flushing liquid from contaminating the liquid treatment tank 201 again.

[0107] As Figure 3 shown, the top wall 2018 of the tank body of the liquid treatment tank 201 can be provided with a second liquid outlet 2022, and the first liquid discharge pipeline 407 can be connected to the second liquid outlet 2022.

[0108] As Figure 2 shown, the flushing module 400 of the embodiment of the present invention can also include a sixth electric valve 408, which is arranged in the first liquid discharge pipeline 407 and is used to open or close the first liquid discharge pipeline 407.

[0109] As Figure 2 shown, the liquid treatment tank of the embodiment of the present invention further includes a liquid to be purified supply module 100, which is used to provide the liquid to be purified to the liquid treatment module 200.

[0110] As Figure 2 shown, the liquid to be purified supply module 100 can include a stock solution tank 101 and a liquid supply pump group 102. Among them, the stock solution tank 101 is used to store the liquid to be purified, and the stock solution tank 101 is connected to the liquid treatment tank 201 through a pipeline. The liquid supply pump group 102 is connected to the stock solution tank 101 and is used to output the liquid to be purified in the stock solution tank 101. Of course, the stock solution tank 101 may not be included in the system, but the pipeline inside the system is connected to the external stock solution tank 101.

[0111] When the liquid treatment tank 201 purifies the liquid to be purified, the liquid supply pump group 102 is turned on to input the liquid to be purified in the stock solution tank 101 into the liquid treatment tank 201. As Figure 2 shown, the liquid to be purified supply module 100 can also include a second relay 103, which is electrically connected to the liquid supply pump group 102, and the opening and closing of the liquid supply pump group 102 can be controlled through the second relay 103.

[0112] As Figure 2 shown, the liquid to be purified supply module 100 may further include a second pollution detector 104, which is disposed in the pipeline connecting the raw liquid tank 101 and the liquid treatment tank 201, and is used to monitor the second pollution value of the liquid to be purified flowing into the liquid treatment tank 201. The type of the second pollution detector 104 may be the same as that of the first pollution detector 203, and those skilled in the art can set it according to the actual situation, which will not be elaborated here.

[0113] Define a pollution threshold, which is the maximum pollution value that the liquid reuse system of the embodiment of the present invention can handle in order to obtain the purified liquid meeting the user's standard. If the second pollution value is greater than the pollution threshold, it means that the pollution of the liquid to be purified exceeds the system's ability to process the liquid to be purified to meet the user's standard, and the liquid to be purified needs to be discharged from the system.

[0114] As Figure 2 shown, the liquid to be purified supply module 100 further includes a third drain pipeline 105, which is communicated with the raw liquid tank 101 and is used to discharge the liquid to be purified with a second pollution value greater than the pollution threshold.

[0115] Continue to refer to Figure 2 , the liquid to be purified supply module 100 further includes: a third electric valve 106, which is disposed in the third drain pipeline 105 and is used to open or close the third drain pipeline 105. The liquid treatment module 200 further includes: a fourth electric valve 211, which is disposed in the pipeline connecting the raw liquid tank 101 and the liquid treatment tank 201 and is used to open or close the liquid inlet end of the liquid treatment tank 201.

[0116] When the second pollution value is greater than the pollution threshold, the third electric valve 106 opens, and the third drain pipeline 105 discharges the liquid to be purified in the raw liquid tank 101. At this time, the fourth electric valve 211 is in the closed state to prevent the liquid to be purified from flowing into the liquid treatment tank 201. When the second pollution value is less than or equal to the pollution threshold, the third electric valve 106 closes, and the fourth electric valve 211 opens to transport the liquid to be purified into the liquid treatment tank 201 for purification treatment.

[0117] In addition, in the embodiment of the present invention, when the second pollution value is less than or equal to the pollution threshold, the addition amount of the pre-purifying agent can also be obtained by using the second pollution value and the flow rate of the liquid to be purified monitored by the first flow monitor 205, so that the pre-purifying agent adding device 202 adds the pre-purifying agent to the liquid to be purified according to this addition amount.

[0118] The liquid reuse system of the embodiment of the present invention can discharge the liquid to be purified with a second pollution value greater than the pollution threshold, avoid providing the liquid to be purified that does not meet the user's usage standard, and at the same time avoid the liquid treatment tank 201 from treating the liquid to be purified, saving energy consumption.

[0119] As Figure 2 shown, the liquid to be purified supply module 100 of the embodiment of the present invention further includes a second liquid level monitor 107 for monitoring the liquid level of the liquid to be purified in the raw liquid tank 101.

[0120] Define a liquid supply level threshold, which is the lowest liquid level that the raw liquid tank 101 can provide for the liquid to be purified. The liquid to be purified below the liquid supply level threshold usually has too many precipitates, resulting in a high degree of contamination and does not need to be purified. The liquid to be purified needs to be discharged. Therefore, if the liquid level value of the liquid to be purified in the raw liquid tank 101 is less than or equal to the liquid supply level threshold, this part of the liquid to be purified cannot be provided to the liquid treatment tank 201 for purification and needs to be discharged.

[0121] The first and second liquid level monitors of the embodiment of the present invention can be any one of a liquid level sensor and a liquid level gauge.

[0122] As Figure 2 shown, the liquid to be purified supply module 100 of the embodiment of the present invention may further include an evacuation pump group 108 connected to the raw liquid tank 101 for discharging the liquid to be purified in the raw liquid tank 101 when the liquid level of the liquid to be purified in the raw liquid tank 101 is lower than the liquid supply level threshold.

[0123] In addition, when the liquid to be purified is rainwater, surface water, or groundwater, the opening of the evacuation pump group 108 can also be determined according to the weather forecast. For example, when heavy rain is forecast, the evacuation pump group 108 can be turned on to empty the liquid to be purified in the raw liquid tank 101 to store the new above-mentioned liquid to be purified.

[0124] As Figure 2 shown, the liquid to be purified supply module 100 may further include a third relay 109 connected to the evacuation pump group 108 for controlling the opening and closing of the evacuation pump group 108.

[0125] Define an evacuation level threshold, which is less than the liquid supply level threshold of the liquid to be purified and is the lowest liquid level value for discharging the liquid to be purified. During the process of discharging the liquid to be purified, when the liquid level value of the liquid to be purified drops to the evacuation level threshold, the evacuation pump group 108 is turned off to stop discharging the liquid to be purified.

[0126] When the liquid level value of the liquid to be purified in the raw liquid tank 101 is greater than the liquid supply level threshold, it means that the liquid to be purified in the raw liquid tank 101 can be provided to the liquid treatment tank 201 for purification, and then the liquid supply pump group 102 can be turned on to output the liquid to be purified.

[0127] As Figure 2As shown in the figure, the liquid recycling system of the embodiment of the present invention may further include a liquid replenishment module 500, which is connected to the buffer container 301. The liquid replenishment module 500 has a reserved interface for connecting to an external purified liquid supply device to replenish the buffer container 301 with external purified liquid.

[0128] When the amount of liquid used is large and the purified liquid purified by the liquid treatment module 200 is not sufficient to supply the liquid used, that is, when the liquid discharge speed in the buffer container 301 is fast (for example, the amount of liquid used by the user is large, or the flushing liquid and the liquid used by the user are carried out simultaneously), the purified liquid replenished only by the liquid treatment module 200 is not sufficient to supply the liquid. In order to ensure normal supply, external replenishment is required. Therefore, the liquid replenishment module 500 is provided to replenish the buffer container 301 with purified liquid in time to ensure normal liquid supply.

[0129] In order to clarify the opening conditions of the liquid replenishment module 500 and the liquid treatment module 200, in the embodiment of the present invention, five liquid level thresholds may be provided in the buffer container 301. From small to large, they are the lowest alarm liquid level threshold, the liquid replenishment liquid level threshold, the treatment liquid level threshold, the injection stop liquid level threshold, and the highest alarm liquid level threshold.

[0130] The first liquid level monitor 302 is used to monitor the liquid level value of the purified liquid in the buffer container 301 in real time. When it is monitored that the liquid level value of the purified liquid is less than or equal to the treatment liquid level threshold, the liquid treatment module 200 is started to purify the untreated liquid and replenish the buffer container 301 with liquid. If the above-mentioned situation of large liquid consumption occurs, causing the liquid level value of the purified liquid in the buffer container 301 to be less than or equal to the liquid replenishment liquid level threshold, the liquid replenishment module 500 is started, and the external purified liquid supply device is used to replenish the buffer container 301 with external purified liquid. When the liquid level value of the purified liquid in the buffer container 301 reaches the injection stop liquid level threshold, the liquid replenishment module 500 can be closed to stop replenishing the external purified liquid.

[0131] Of course, if the liquid treatment module 200 is also performing purification treatment at this time, when the liquid level value of the purified liquid reaches the injection stop liquid level threshold, the liquid treatment module 200 can be closed simultaneously to stop replenishing the buffer container 301 with the purified liquid. That is, as long as the purified liquid in the buffer container 301 reaches the injection stop liquid level threshold, whether the liquid treatment module 200 is replenishing the buffer container 301 with liquid or the liquid replenishment module 500 is replenishing the buffer container 301 with liquid, both are closed to stop replenishing the liquid.

[0132] As Figure 2 shown, the liquid replenishment module 500 of the embodiment of the present invention may include a second flow monitor 501, which is arranged in the pipeline connecting the liquid replenishment module 500 and the purified liquid supply device to monitor the flow rate of the external purified liquid replenished into the buffer container 301 to ensure the normal replenishment of the external purified liquid.

[0133] As Figure 2 shown, the liquid replenishing module 500 of the embodiment of the present invention may further include a third pressure monitor 502, which is arranged in the pipeline connecting the liquid replenishing module 500 and the purified liquid supply device, and is used to monitor the pressure value of the external purified liquid replenished into the buffer container 301 to ensure the normal replenishment of the external purified liquid.

[0134] As Figure 2 shown, the liquid replenishing module 500 of the embodiment of the present invention may further include a seventh electric valve 503, which is used to control the opening and closing of the liquid replenishing module 500.

[0135] Among them, the liquid provided by the external purification device may be purified liquid. For example, when the liquid to be purified is sewage, rainwater, surface water, or groundwater, the liquid provided by the external purification device may be tap water. When the liquid to be purified is an oily substance, the liquid provided by the external purification device is an oily substance liquid that meets the use standard and has the same type as the liquid to be purified.

[0136] When the first liquid level monitor 302 monitors that the liquid level value in the buffer container 301 reaches the highest alarm liquid level threshold, the system will issue an alarm. Among them, the highest alarm liquid level threshold is the highest liquid storage level of the buffer container 301. If the first liquid level value of the purified liquid is higher than this highest alarm liquid level threshold, the purified liquid is likely to overflow, so an alarm is needed to remind the user. When the first liquid level monitor 302 monitors that the liquid level value in the buffer container 301 drops to the lowest alarm liquid level threshold, the system will also issue an alarm. The lowest alarm liquid level threshold is the lowest liquid storage level of the buffer container 301. If the first liquid level value of the purified liquid is lower than this lowest alarm liquid level threshold, normal liquid supply will not be possible, so an alarm is needed to remind the user.

[0137] As Figure 2 shown, the liquid reuse system of the embodiment of the present invention may further include a purified liquid output module 600, which is connected to the buffer container 301 and is used to output the purified liquid in the buffer container 301. The purified liquid output module 600 includes a booster pump group 601, which is used to boost the purified liquid output module 600.

[0138] The purified liquid output module 600 is used to provide the purified liquid for the liquid flushing pipeline 401 and the user end 603. Among them, the user end 603 may be a connector connected to the user's use end. As Figure 2As shown, the purified liquid output module 600 includes an infusion pipeline 602, which is connected to the buffer container 301 and is used to output the purified liquid in the buffer container 301. When the infusion pipeline 602 is not opened, there is a certain pressure at its liquid outlet. When the infusion pipeline 602 is opened, the purified liquid flows outwards and the pressure decreases. In order to ensure the smooth outflow of the purified liquid, the purified liquid needs to have a certain pressure. Therefore, the pressure of the purified liquid can be increased by the booster pump group 601 to ensure the normal supply of the purified liquid.

[0139] Define a preset pressure threshold, which is the minimum pressure value of the infusion pipeline 602 for the purified liquid to flow out smoothly and be used. When the pressure value of the purified liquid is less than this preset pressure threshold, the flow rate of the purified liquid may be very small, resulting in abnormal use. Therefore, when the pressure value of the purified liquid in the infusion pipeline 602 is less than this preset pressure threshold, the booster pump group 601 is turned on to pressurize the purified liquid in the infusion pipeline 602, increase the flow rate, and ensure the smooth output of the purified liquid. The pressure and flow rate of the purified liquid can be determined according to the liquid usage requirements. At the same time, it can ensure the output of the purified liquid under constant pressure. Of course, after the infusion pipeline 602 is opened and the purified liquid can flow out smoothly and the pressure value of the purified liquid is greater than the preset pressure threshold, the booster pump group 601 can be not turned on.

[0140] When the use of the purified liquid is stopped, the liquid outlet of the purified liquid output module 600 is closed, and then the booster pump group 601 can be closed.

[0141] In some embodiments, the booster pump group 601 can achieve constant pressure control and can also achieve proportional pressure control. Combined with the high-efficiency IE5 permanent magnet motor, it can achieve energy conservation to the greatest extent and is suitable for the liquid usage amounts and pressure requirements of different liquid usage ends.

[0142] In some embodiments of the present invention, as Figure 4 shown, the liquid recycling system may further include a controller 700, which can be electrically connected to each electrical component in the liquid treatment module 200 and the buffer module 300 respectively, and is used to control the liquid treatment tank 201 to purify the to-be-purified liquid and control the opening and closing of the buffer module 300. Among them, the controller can be, for example, a PLC (programmable logic controller).

[0143] As Figure 4 shown, the controller 700 can also be electrically connected to each electrical component in the to-be-purified liquid supply module 100, the flushing module 400, the liquid replenishing module 500, and the purified liquid output module 600, so as to respectively control the to-be-purified liquid supply module 100 to provide the to-be-purified liquid to the liquid treatment tank 201, the flushing module 400 to flush the liquid treatment tank 201, control the liquid replenishing module 500 to replenish the external purified liquid into the buffer container 301, and control the purified liquid output module 600 to smoothly output the purified liquid.

[0144] In some embodiments, the controller 700 may be electrically connected to the liquid supply pump group 102, the second pollution detector 104, the third electric valve 106, the second liquid level monitor 107, and the drain pump group 108 in the liquid to be purified supply module 100.

[0145] The controller 700 may be electrically connected to the first electric valve 207, the second electric valve 208, the fourth electric valve 211, the first pollution detector 203, the first pressure monitor 209, the second pressure monitor 210, the pre-purifying agent adding device 202, the auxiliary purifying agent adding device 204, and the first flow monitor 205 in the liquid treatment module 200.

[0146] The controller 700 may be electrically connected to the first liquid level monitor 302 in the buffer module 300.

[0147] The controller 700 may be electrically connected to the fifth electric valve 403 and the third flow monitor 404 in the liquid flushing pipeline 401 of the flushing module 400, electrically connected to the electric valve in the gas flushing pipeline 402, and electrically connected to the sixth electric valve 408 in the first liquid drainage pipeline 407.

[0148] The controller 700 may be electrically connected to the second flow monitor 501, the third pressure monitor 502, and the seventh electric valve 503 in the liquid replenishing module 500.

[0149] The controller 700 may be electrically connected to the booster pump group 601 in the purified liquid output module 600.

[0150] The following describes the control relationship between the controller 700 and the electrical components in each module in a preferred embodiment to realize the operation of the entire system.

[0151] The first liquid level monitor 302 sends the monitored liquid level information of the purified liquid in the buffer container 301 to the controller 700. After receiving the liquid level information, the controller 700 obtains the liquid level value of the purified liquid and judges the liquid level value. If the liquid level value is greater than or equal to the highest alarm liquid level, the control system alarms; if the liquid level value is less than or equal to the processing liquid level threshold, the liquid treatment module 200 is controlled to process the liquid to be purified; if the liquid level value is less than or equal to the liquid replenishing liquid level threshold, the liquid replenishing module 500 is controlled to replenish the buffer container 301; if the liquid level value is less than or equal to the lowest alarm liquid level threshold, the control system alarms.

[0152] Before the liquid handling module 200 processes the liquid to be purified, the controller 700 receives the liquid level information of the liquid to be purified in the stock solution tank 101 sent by the second liquid level monitor 107 in the liquid supply module 100 for the liquid to be purified, obtains the liquid level value of the liquid to be purified based on the liquid level information, and judges the liquid level value. If the liquid level value is less than or equal to the liquid supply level threshold, it controls to open the drain pump group 108 to drain the liquid to be purified in the stock solution tank 101 until the liquid level value reaches the drain liquid level threshold. If the liquid level value is greater than the liquid supply level threshold, it controls to start the liquid supply pump group 102.

[0153] After starting the liquid supply pump group 102, it obtains the pollution information of the liquid to be purified detected by the second pollution detector 104, obtains the pollution value of the liquid to be purified based on the pollution information, and judges the pollution value. If the pollution value is greater than the pollution threshold, it controls to open the third electric valve 106 to drain the liquid to be purified out of the system. If the pollution value is less than or equal to the pollution threshold, it controls to open the fourth electric valve 211 of the liquid handling module 200 to input the liquid to be purified into the liquid treatment tank 201.

[0154] The controller 700 receives in real time the flow rate of the liquid to be purified detected by the first flow monitor 205, obtains the addition amount of the pre-purifying agent based on the pollution value of the liquid to be purified, and controls the pre-purifying agent adding device 202 to add the pre-purifying agent to the liquid to be purified that has not entered the liquid treatment tank 201.

[0155] The controller 700 receives in real time the pollution information of the purified liquid output from the liquid treatment tank 201 detected by the first pollution detector 203, obtains the pollution value of the purified liquid based on the pollution information, and judges the pollution value. If the pollution value is greater than the preset pollution threshold, it controls to open the second electric valve 208 to drain the purified liquid out of the system. If the pollution value is less than or equal to the preset pollution threshold, it controls to open the first electric valve 207 to supplement the purified liquid into the buffer container 301.

[0156] The controller 700 obtains the addition amount of the auxiliary purifying agent based on the pollution value of the purified liquid and the flow rate value of the liquid to be purified monitored by the first flow monitor 205, and controls the auxiliary purifying agent adding device 204 to add the auxiliary purifying agent to the purified liquid.

[0157] The controller 700 obtains the pressure values of the first pressure monitor 209 and the second pressure monitor 210 in real time, calculates the difference between the two pressure values, and judges the difference. If the difference in pressure is greater than or equal to the pressure threshold, it controls the liquid supply pump group 102, the fourth electric valve 211, the first flow monitor 205, the pre-purifying agent adding device 202, the first pollution detector 203, the first electric valve 207, and the auxiliary purifying agent adding device 204 to close, stops the purification treatment of the liquid treatment tank 201 for the liquid to be purified, and controls the fifth electric valve 403, the third flow monitor 404, the sixth electric valve 408, and the air pump 405 of the flushing module 400 to be opened to perform backwashing on the liquid treatment tank 201. During this process, it obtains the pressure value of the purified liquid in the liquid delivery pipeline 602 of the purified liquid output module 600. If the pressure value is less than the preset pressure threshold, it controls the booster pump group 601 to be opened to boost the pressure of the purified liquid. The controller 700 controls whether the backwashing ends according to the system setting or manual setting, and records the number of backwashing times.

[0158] The controller 700 receives in real time the liquid level value of the purified liquid in the buffer container 301 monitored by the first liquid level monitor 302. If the liquid level value is still less than the treatment liquid level threshold, it controls the liquid treatment module 200 to be opened to perform purification treatment on the liquid to be purified, and the process is the same as above. If the liquid level value is less than the liquid replenishment level threshold, it controls the liquid replenishment module 500 to be opened.

[0159] The controller 700 controls the seventh electric valve 503, the second flow monitor 501, and the third pressure monitor 502 to be opened, so that the external purified liquid is replenished into the buffer container 301 until the liquid level value of the purified liquid in the buffer container 301 reaches the stop injection liquid level threshold, controls the liquid replenishment module 500 to close, stops the external purified liquid from being replenished into the buffer container 301, and at the same time controls the liquid treatment module 200 to close, stops the purified liquid from being replenished into the buffer container 301.

[0160] When the user terminal 603 uses the purified liquid, it detects and obtains the pressure value of the purified liquid in the liquid delivery pipeline 602 of the purified liquid output module 600. If the pressure value is less than the preset pressure threshold, it controls the booster pump group 601 to be opened to boost the pressure of the purified liquid.

[0161] As a preferred embodiment, the above embodiment describes the control relationship between the controller 700 and each electrical component in each module. Of course, in other embodiments, the electrical components included in each module are different. For example, in some embodiments, the second pollution detector 104, the third electric valve 106, and the second liquid level monitor 107 are not provided in the liquid to be purified supply module 100. Then, when purification treatment is required, the liquid supply pump group 102 can be directly controlled to input the liquid to be purified into the liquid treatment tank 201. That is, when certain electrical components do not exist in other embodiments, the controller 700 does not control to execute their functions.

[0162] In the above embodiments, the controller 700 is included in the liquid recycling system and can achieve local control. In some other embodiments, the liquid recycling system can implement the above control process based on wired connections such as Ethernet, RS485, etc., or based on wireless communication systems such as 4G, 5G, WIFI, etc. For example, the controller 700 is provided in the liquid recycling system, and the controller 700 is connected to the cloud server. Taking the rainwater to be purified as an example, the cloud server can achieve rainstorm warning, water quality prediction, and summarization of historical weather data, can realize the intelligent and iterative optimization of the proportioning of flocculants, disinfection, and backwashing according to the water quality and weather conditions, and can also achieve the summarization and calculation of the treatment volume of the liquid to be purified and the usage volume of the purified liquid, and realize various reminder functions. At the same time, it can also judge whether it is necessary to empty the liquid to be purified (rainwater) in the raw liquid tank 101 according to the statistical information of the weather.

[0163] In some other embodiments, the liquid recycling system may not include the controller 700, but directly communicate with the cloud server, and the cloud server controls the operation of the system.

[0164] Users can remotely monitor and control the system through multiple terminals such as computers, mobile phones, and control boxes, which can minimize the effluent cost and operation cost, and facilitate the use and maintenance of customers.

[0165] In some embodiments of the present invention, the system can be provided with a preset flushing time to flush the liquid treatment tank 201 at the preset flushing time.

[0166] Among them, the preset flushing time can be the time for regularly flushing the liquid treatment tank 201 by default in the system or set manually. The preset flushing time can usually be set at night because the liquid usage frequency is low at night, and the liquid treatment tank 201 can be flushed in advance to ensure that the liquid treatment tank 201 is in the liquid purification state during the peak liquid usage period during the day and replenish the buffer container 301 in time. The flushing time interval can be one day, two days, or more days, that is, the backwashing can be carried out regularly every day, or every other day, two days, or more days. In different application scenarios, the liquid usage amount is different, resulting in different purification treatment amounts of the liquid treatment tank 201. Therefore, the backwashing time interval can be set according to different application scenarios, and no special limitation is made here.

[0167] In some embodiments of the present invention, the system can be provided with a preset reminder time to remind the user to replace and add the purifying agent. The preset reminder time can be one day, two days, or more days, that is, it can remind the user to replace or add the purifying agent regularly every day, or every other day, three days, five days.

[0168] In some embodiments of the present invention, the system may be provided with a preset refueling time to remind the user to replace the filter material 2014 in a timely manner.

[0169] When the liquid treatment tank 201 filters the liquid to be purified, after filtering for a period of time, the filter material 2014 needs to be replaced to ensure the filtration quality and efficiency. The interval of the preset refueling time can be half a month, one month or two months, which can be set according to the actual filtration situation and is not specifically limited here.

[0170] The above-mentioned preset flushing time, preset reminder time and preset refueling time can all be set in the cloud server or in the controller 700, and are not specifically limited here.

[0171] In the embodiments of the present invention, the system automatically triggers the purification treatment of the liquid to be purified according to the demand of the water-using end, and realizes instant water supply through the water level monitoring of the buffer module 300, which is different from the market situation of pre-treating and storing rainwater in the water purification tank, saving the excess rainwater treatment volume and water storage tank (pool).

[0172] In the embodiments of the present invention, the system can automatically judge whether the purified liquid can meet the liquid usage demand according to the pressure and water level of the buffer container 301, realize the automatic control of the purification treatment and external liquid supplement, and accurately control the liquid supply volume. In addition, when treating rainwater, the system can automatically predict the rainwater quality according to the historical rainfall situation, intelligently calculate the flocculant concentration, add the flocculant as needed, and automatically optimize and adjust the flocculant concentration according to the effluent quality, so as to maximize the water quality and reduce the cost.

[0173] When the liquid reuse system of the embodiments of the present invention is in the standby state, as Figure 2 shown, each electric valve is in the closed state, the air pump 405 is in the standby state, each pressure monitor is in dynamic monitoring, and the data can be transmitted at a preset interval, for example, transmitted once every 1 s. A pressure sensor is provided in the booster pump group 601, and it is also in dynamic monitoring, and its detection frequency can be set to 10 times per second, or other intervals. The first liquid level monitor 302 and the second liquid level monitor 107 are also in dynamic monitoring, and their detection frequency can be set to 10 times per second, or other intervals. The weather forecast information and historical weather data can be set to be updated once every 30 minutes, or updated at other time intervals. The remaining amounts of the pre-purifying agent and the auxiliary purifying agent can be updated once a day or at other time intervals, and each flow monitor is in the standby state.

[0174] As Figure 5As shown, the liquid recycling system of the embodiment of the present invention may further include a housing 800, in which the liquid treatment module 200, the buffer module 300, and the flushing module 400 are all disposed. The housing 800 is provided with a pipeline interface for connecting the internal pipeline to the external pipeline. In addition, the fluid replenishment module 500 may also be disposed in the housing 800.

[0175] That is, the liquid recycling system of the embodiment of the present invention is installed in a prefabricated box, which realizes the waterproof and sun-proof functions of the system and extends the service life of the system.

[0176] The shell 800 is provided with a pipe interface. When installing the system, just place the shell 800 at the installation site and connect the pipe interface to the pipe of the raw liquid tank 101 and the external purification liquid supply device, realizing plug-and-play and greatly simplifying the client's installation process.

[0177] like Figure 5 As shown, the length of the housing of the embodiment of the present invention can be 1.8 to 2.5 meters. For example, in addition to the two end values mentioned above, the length can also be 1.9 meters, 2 meters, 2.1 meters, 2.2 meters, and 2.3 meters. The width can be 1.2 to 2 meters. For example, in addition to the two end values mentioned above, the width can also be 1.3 meters, 1.5 meters, 1.6 meters, and 1.8 meters. The height can be 2 meters to 3 meters. For example, in addition to the two end values mentioned above, the height can also be 2.1 meters, 2.2 meters, 2.4 meters, 2.5 meters, and 2.8 meters. Those skilled in the art can design the above dimensions according to actual conditions and are not specifically limited here. The system is integrated and installed in the above housing, greatly reducing the floor space.

[0178] like Figure 5 As shown, in the embodiment of the present invention, the shape of the shell 800 can be a rectangular parallelepiped, a cube or a cylinder. The shape of the shell 800 can be selected according to the actual layout of each module of the system, and is not specifically limited here.

[0179] In some embodiments, the liquid recycling system may also include a display screen, for example, arranged on the shell 800, for human-computer interaction, and at the same time displaying status information of the liquid recycling system, such as the liquid level value of the purified liquid in the buffer container 301, the liquid level value of the liquid to be purified in the raw liquid tank 101, the operating status of the liquid treatment tank 201, etc., to facilitate user viewing and operation.

[0180] The liquid recycling system of the embodiment of the present invention can be installed indoors, outdoors, or in the basement on the ground of a commercial building, home, or factory. Depending on different application scenarios, the purified liquid provided by the system can be used for flushing toilets, irrigation, or as a coolant to cool the cooling device.

[0181] In summary, the liquid reuse system according to the embodiments of the present invention not only reduces the floor area, simplifies the purification process, but also improves the purification speed, and can be installed in a housing, thus simplifying the installation process.

[0182] It should be understood that the present invention does not limit its application to the detailed structures and arrangements of the components set forth in this specification. The present invention is capable of having other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications fall within the scope of the present invention. It should be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more separate features mentioned and / or evident in the text and / or drawings. All such different combinations constitute various alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for practicing the invention and will enable those skilled in the art to utilize the invention.

Claims

1. A liquid recycling system, characterized in that: include: A liquid processing module, comprising a liquid processing tank and a status monitoring component, wherein the liquid processing tank is used to purify the liquid to be purified, and the status monitoring component is used to monitor the operating status of the liquid processing tank, wherein the operating status includes a flushing state and a non-flushing state; The buffer module includes a buffer container and a first liquid level monitor. The buffer container is connected to the liquid processing module and is used to store the purified liquid output by the liquid processing module; the first liquid level monitor is used to monitor the liquid level of the purified liquid in the buffer container.

2. The system according to claim 1, wherein: Also includes: a flushing module connected to the liquid treatment tank and the buffer container, and configured to flush the liquid treatment tank with the purified liquid in the buffer container when the liquid treatment tank is in the flushing state; In which, the flushing module includes: a liquid flushing pipeline, connected to the buffer container and the liquid treatment tank, for providing the purified liquid as a flushing liquid when the liquid treatment tank is in the flushing state; a gas flushing pipeline, connected to the liquid treatment tank, the gas flushing pipeline is connected to the air pump, for providing flushing gas when the liquid treatment tank is in the flushing state.

3. The system according to claim 2, characterized in that The liquid treatment tank includes an outer treatment chamber and an inner treatment chamber. The outer treatment chamber is used to pre-purify the liquid to be purified. The inner treatment chamber is provided with filter material for filtering the liquid to be purified that has undergone pre-purification.

4. The system according to claim 3, characterized in that The liquid flushing pipeline and the gas flushing pipeline are respectively connected to the bottom of the inner treatment chamber of the liquid treatment tank, and are used to backwash the filter material in the inner treatment chamber; The flushing module also includes a first liquid discharge pipeline connected to the top of the inner processing chamber for discharging the flushing liquid after flushing.

5. The system according to claim 3, wherein: The condition monitoring component includes: a first pressure monitor, disposed at the top of the inner treatment chamber of the liquid treatment tank, for monitoring a first pressure value of the liquid to be purified above the filter material in the inner treatment chamber; A second pressure monitor is provided at the bottom of the inner treatment chamber of the liquid treatment tank, and is used to monitor a second pressure value of the filtered purified liquid located below the filter material in the inner treatment chamber. The first pressure value and the second pressure value are used to indicate the operating status of the liquid treatment tank.

6. The system according to claim 1, wherein: The liquid processing module also includes: The pre-purification agent adding device is connected to the liquid treatment tank and is used to add the pre-purification agent to the liquid to be purified that is to flow into the liquid treatment tank.

7. The system according to claim 1, wherein: The liquid processing module also includes: The first contamination detector is provided in a pipeline connecting the liquid processing tank and the buffer container, and is used for monitoring a first contamination value of the purified liquid.

8. The system according to claim 7, characterized in that The liquid processing module also includes: A second liquid discharge pipeline is connected to the liquid processing tank and is used to discharge the purified liquid whose first contamination value is greater than a preset contamination value.

9. The system according to claim 1, wherein: The liquid processing module also includes: The auxiliary purifying agent adding device is provided in the pipeline connecting the liquid treatment tank and the buffer container, and is used for adding the auxiliary purifying agent to the purified liquid flowing out of the liquid treatment tank.

10. The system according to claim 1, wherein: It also includes a liquid supply module to be purified, including: A raw liquid tank, used for storing the liquid to be purified, and the raw liquid tank is connected to the liquid treatment tank through a pipeline; The liquid supply pump group is connected to the raw liquid pool and is used to output the liquid to be purified in the raw liquid pool.

11. The system according to claim 10, wherein: The liquid to be purified supply module also includes: The second pollution detector is provided in a pipeline connecting the raw liquid pool and the liquid treatment tank, and is used for monitoring a second pollution value of the liquid to be purified flowing into the liquid treatment tank.

12. The system according to claim 11, wherein: The liquid to be purified supply module also includes: The third liquid discharge pipeline is connected to the raw liquid pool and is used to discharge the liquid to be purified whose second contamination value is greater than the contamination threshold.

13. The system according to claim 12, wherein: The liquid supply module to be purified further includes: a third electric valve, provided in the third liquid discharge pipeline, for opening or closing the third liquid discharge pipeline; The liquid processing module further includes: a fourth electric valve, which is provided in a pipeline connecting the raw liquid pool and the liquid processing tank, and is used to open or close the liquid inlet end of the liquid processing tank.

14. The system according to claim 10, wherein: The liquid to be purified supply module also includes: The second liquid level monitor is used to monitor the liquid level of the liquid to be purified in the raw liquid pool.

15. The system according to claim 14, wherein: The liquid to be purified supply module also includes: The emptying pump group is connected to the raw liquid pool and is used to discharge the liquid to be purified in the raw liquid pool when the liquid level of the liquid to be purified in the raw liquid pool is lower than the liquid supply level threshold.

16. The system according to claim 1, wherein: Also includes: The fluid replenishment module is connected to the buffer container and has a reserved interface. The reserved interface is used to connect to the purification liquid supply device to replenish the external purification liquid into the buffer container.

17. The system according to claim 16, wherein: The fluid infusion module comprises: a second flow rate monitor, provided in the pipeline connecting the fluid replenishment module and the purification fluid supply device, for monitoring the flow rate of the external purification fluid replenished into the buffer container; and / or The third pressure monitor is provided in the pipeline connecting the liquid replenishing module and the purification liquid supply device, and is used to monitor the pressure value of the external purification liquid replenished into the buffer container.

18. The system according to claim 1, wherein: Also includes: The purified liquid output module is connected to the buffer container and is used to output the purified liquid in the buffer container. The purified liquid output module includes a booster pump group for boosting the pressure of the purified liquid output module.

19. The system according to any one of claims 1 to 18, characterized in that Also includes: The controller is electrically connected to the liquid processing module and the buffer module respectively, and is used to control the liquid processing tank to purify the liquid to be purified and to control the opening and closing of the buffer module.

20. The system according to any one of claims 1 to 18, characterized in that Also includes: A shell, wherein the liquid processing module and the buffer module are both arranged in the shell; the shell is provided with a pipeline interface for connecting the pipeline inside the shell with the pipeline outside; The floor space of the liquid recycling system satisfies the following relationship: A≤0.6Q / H+0.78Q Where A represents the floor space of the liquid recycling system, in m 2 ; Q represents the volume flow rate of the liquid to be purified per unit time, in m 3 / h; H represents the height of the liquid treatment tank in m.

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