Water treatment device based on mid-water depth reuse

Abstract

The utility model relates to the technical field of reclaimed water treatment, specifically relates to a water treatment device based on reclaimed water advanced reuse, the composite processing unit includes the advanced activated carbon adsorption chamber that surrounds the circumference is arranged, reverse osmosis system chamber, ion exchange reactor chamber and two groups of ultrafiltration membrane component chamber, the inlet of advanced activated carbon adsorption chamber is connected with the outlet of water pump, the outlet of advanced activated carbon adsorption chamber is connected with pipeline two through pipeline one, three -way valve one, three -way valve two, three -way valve three and three -way valve four are sequentially arranged on pipeline two, one export of three -way valve one is connected with the import of reverse osmosis system chamber, one export of three -way valve two is connected with the import of ion exchange reactor chamber, one export of three -way valve three is connected with the import of an ultrafiltration membrane component chamber, in the composite processing unit of the utility model, the whole treatment process has continuity, and there is no waiting process, compared with traditional processing mode, the processing efficiency is improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of greywater treatment technology, specifically to a water treatment device based on deep reuse of greywater. Background Technology

[0002] Reclaimed water refers to treated water that meets specific water quality standards and can be reused in non-potable water applications (such as industrial cooling and greening irrigation). In water-intensive industries such as petrochemical plants, the massive consumption of water resources not only brings cost pressures but also imposes a burden on the environment. Achieving water conservation and emission reduction is urgent, and reclaimed water reuse has become a key way to achieve this goal.

[0003] Currently, wastewater reuse mainly employs biological treatment, physical methods (such as membrane filtration), and physicochemical methods (such as chemical oxidation and adsorption), but each has its limitations. Biological treatment decomposes organic matter in water using microorganisms, but it requires a large land area. Furthermore, wastewater has a higher salt content than fresh water: when used as makeup water for industrial circulating systems, the salt content continuously increases as water in the circulation system is concentrated and evaporated; moreover, due to the diverse sources of wastewater, including domestic sewage and industrial wastewater, the water quality varies significantly. Therefore, facing these complex situations, traditional physicochemical treatment devices such as activated carbon filtration, sand filtration, and precision filters are insufficient.

[0004] The combined use of biological, physical, and physicochemical treatment methods is a more ideal approach, leveraging the advantages of each method to address complex water quality issues. However, traditional combined wastewater treatment systems mostly employ decentralized treatment units, with each treatment stage independently set up. This results in a large footprint and insufficient space utilization. Furthermore, these systems lack a control system, making it difficult to dynamically adjust the treatment process based on real-time changes in wastewater quality. When water quality suddenly deteriorates or the water volume fluctuates significantly, the treatment process cannot be optimized in a timely manner, leading to unstable treatment efficiency and sometimes failing to meet the expected wastewater reuse standards.

[0005] To address the aforementioned issues, our factory adopted equipment similar to that disclosed in the patent "A Water Treatment Device for Deep Reuse of Greywater" (application number CN201621449328.2). However, in actual use, it was found that this treatment technology still has shortcomings, most notably low treatment efficiency, primarily due to limitations imposed by the composite treatment unit. Taking the process of greywater sequentially passing through a sand filter, activated carbon adsorption chamber, and reverse osmosis system chamber as an example, the greywater, after being filtered in the sand filter, enters the activated carbon adsorption chamber and, after treatment, flows into the collection tank. Only after all the greywater has completed treatment in the activated carbon adsorption chamber will the booster pump be activated to lift the greywater back to the sand filter, then into the reverse osmosis system chamber for further treatment, and finally into the disinfection equipment. (If the booster pump is activated before all the greywater has completed treatment in the activated carbon adsorption chamber, the treated greywater from different parts will mix, significantly affecting the treatment effect and resulting in substandard greywater quality.) This process shows that there is a long waiting period before the reclaimed water enters the reverse osmosis system chamber; and the more treatment chambers are called up, the longer this waiting period becomes, which seriously restricts the overall treatment efficiency of the reclaimed water. Utility Model Content

[0006] This invention provides a water treatment device based on deep reuse of greywater, which aims to solve the problem of low treatment efficiency of existing integrated greywater treatment equipment.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] This utility model provides a water treatment device based on deep reuse of greywater, including a tank. An inlet valve is located at the top of the tank, and an outlet valve is located at the lowest point. From top to bottom, the tank contains a filtration chamber, a composite treatment unit, and a disinfection chamber. The bottom outlet of the filtration chamber is connected to the inlet of a water pump via a gate valve. From top to bottom, the filtration chamber contains an activated carbon filter layer, a filter media layer, a microporous aeration plate, and a sand filter layer. An air inlet valve is located on the side wall of the tank, communicating with the microporous aeration plate, and connected to an external fan via a pipe.

[0009] The composite treatment unit includes a deep activated carbon adsorption chamber, a reverse osmosis system chamber, an ion exchange reactor chamber, and two sets of ultrafiltration membrane module chambers arranged in a circular pattern. The inlet of the deep activated carbon adsorption chamber is connected to the outlet of the water pump, and the outlet of the deep activated carbon adsorption chamber is connected to pipe two via pipe one. Pipe two is sequentially equipped with three-way valves one, two, three, and four. One outlet of three-way valve one is connected to the inlet of the reverse osmosis system chamber, one outlet of three-way valve two is connected to the inlet of the ion exchange reactor chamber, and one outlet of three-way valve three is connected to a... The inlet of the ultrafiltration membrane module chamber is connected, and one outlet of the three-way valve four is connected to the inlet of another ultrafiltration membrane module chamber; the outlet of the reverse osmosis system chamber is connected to one end of pipe three, the other end of pipe three is connected to the inlet of gate valve two, and the outlet of gate valve two is connected to pipe two; the outlet of the ion exchange reactor chamber is connected to one end of pipe four, the other end of pipe four is connected to the inlet of gate valve three, and the outlet of gate valve three is connected to pipe two; the outlets of both sets of ultrafiltration membrane module chambers and the other outlet of the three-way valve four are all connected to the ultraviolet disinfection unit described below through valves;

[0010] The disinfection chamber is equipped with an ultraviolet disinfection unit.

[0011] A water quality analyzer is installed in the filtration chamber, and the water quality analyzer is positioned above the activated carbon filter layer; a water quality analyzer is installed at the outlet of the composite treatment unit.

[0012] Furthermore, the bottom of the filter chamber has a funnel-shaped structure.

[0013] Furthermore, the inner wall of the tank is provided with parallel upper and lower plates on both the left and right sides, and a limiting post is provided between the upper and lower plates. The activated carbon filter layer is provided between the upper and lower plates on both the left and right sides, and through holes are provided on the left and right sides of the activated carbon filter layer. The limiting post is inserted into the through hole. Two springs are sleeved on each limiting post, and the two springs clamp the activated carbon filter layer in the middle.

[0014] Furthermore, a herringbone-shaped flow divider is provided inside the tank, which is positioned above the activated carbon filter layer and directly below the water inlet valve.

[0015] Furthermore, the ultraviolet disinfection unit includes an ultraviolet light source and a transparent glass tube spirally wound around the outer periphery of the ultraviolet light source. Several filters are spaced apart inside the transparent glass tube, and anatase titanium dioxide catalytic membranes are provided on the inner wall of the transparent glass tube and on the filters.

[0016] Furthermore, a drain valve is provided on the top of the tank.

[0017] Furthermore, the water treatment device also includes a backwashing mechanism, which includes a lift pump, a three-way valve five, a three-way valve six, a gate valve four, and a purified water connection valve. The inlet of the three-way valve six is ​​connected to the outlets of the two ultrafiltration membrane module chambers, one outlet of the three-way valve six is ​​connected to the inlet of the transparent glass tube, the other outlet of the three-way valve six is ​​connected to one inlet of the three-way valve five, the outlet of the purified water connection valve is connected to the other inlet of the three-way valve five, the outlet of the three-way valve five is connected to the inlet of the lift pump, the outlet of the lift pump is connected to the inlet of the gate valve four through a pipe, and the outlet of the gate valve four is connected to the bottom of the filter chamber.

[0018] The beneficial effects achieved by this utility model are as follows:

[0019] This invention vertically integrates microporous aerated biological activated carbon filtration, sand filtration, composite treatment (activated carbon adsorption, reverse osmosis, ion exchange, ultrafiltration), and ultraviolet disinfection units into a single unit, significantly reducing the floor space required, making it particularly suitable for space-constrained petrochemical plant areas. Simultaneously, the modular design reduces the complexity of equipment installation and maintenance, resulting in a significant optimization of overall costs.

[0020] The activated carbon filter layer of this invention can move horizontally up and down through elastic components, promoting full contact between activated carbon particles and water, avoiding the clogging problem of traditional fixed filter layers, extending the service life of activated carbon, and improving adsorption efficiency. The online water quality detection component, in conjunction with the solenoid valve and booster pump control module, can dynamically select one or more of the composite treatment units based on real-time water quality data, flexibly responding to different water quality fluctuations and ensuring stable treatment results.

[0021] The ultraviolet disinfection unit of this invention combines a short-wave ultraviolet lamp with anatase titanium dioxide catalytic membrane. It degrades residual organic matter and pathogens through photocatalytic oxidation, improving disinfection efficiency by more than 30% compared to single ultraviolet treatment, while reducing the use of chemical agents.

[0022] In this composite treatment unit, the filtration devices are connected end-to-end, and the water flow direction is precisely controlled by several three-way valves and gate valves, with the water flow power provided by a water pump. The entire treatment process is continuous, with no waiting time, significantly improving treatment efficiency compared to traditional methods. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the internal structure of this utility model; in the figure, the X-axis is defined as the left-right direction (horizontal), and its arrow is defined as pointing to the right; the Z-axis is defined as the up-down direction (vertical), and its arrow is defined as pointing to the up.

[0025] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the diagram.

[0026] Figure 3 This is a top view of the composite processing unit of this utility model.

[0027] Figure 4 This is a schematic diagram showing the unfolded connection of each device in the composite processing unit of this utility model.

[0028] In the diagram, 10 is the water treatment device; 110 is the tank; 111 is the inlet valve; 112 is the outlet valve; 113 is the diversion plate; 114 is the filter chamber; 115 is the disinfection chamber; 116 is the drain valve; 120 is the activated carbon filter layer; 121 is the upper plate; 122 is the lower plate; 123 is the limiting column; 124 is the spring; 131 is the filter media layer; 132 is the sand filter layer; 140 is the microporous aeration plate; 141 is the air inlet valve; 150 is the water pump; 151 is the gate valve; 160 is the composite treatment unit; 161 is the deep activated carbon adsorption chamber; 162 is the reverse osmosis system chamber; 163 is the ion exchange reactor chamber; 164 is the ultrafiltration unit; Filter membrane module chamber; 165, Pipeline 1; 166, Pipeline 2; 166A, Three-way valve 1; 166B, Three-way valve 2; 166C, Three-way valve 3; 166D, Three-way valve 4; 167, Pipeline 3; 167A, Gate valve 2; 168, Pipeline 4; 168A, Gate valve 3; 170, Ultraviolet disinfection unit; 171, Transparent glass tube; 172, Ultraviolet light source; 173, Filter screen; 180, Backwashing mechanism; 181, Booster pump; 182, Three-way valve 5; 183, Three-way valve 6; 184, Gate valve 4; 185, Water purification connection valve; 191, Water quality analyzer 1; 192, Water quality analyzer 2. Detailed Implementation

[0029] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] like Figures 1-4 As shown, this utility model provides a water treatment device 10 based on deep reuse of greywater, including a tank 110. The top of the tank 110 is provided with an inlet valve 111, which is connected to the greywater pipeline to be treated in the plant area through a pipe. The top of the tank 110 is provided with a drain valve 116, which is connected to the sewage discharge pipeline in the plant area through a pipe. The lowest point of the tank 110 is provided with an outlet valve 112, which is connected to the greywater circulation pipeline in the plant area to introduce the filtered greywater into the circulation pipeline.

[0033] The tank 110 is provided with a filtration chamber 114, a composite treatment unit 160 and a disinfection chamber 115 arranged from top to bottom.

[0034] The bottom of the filter chamber 114 has a funnel-shaped structure, and the bottom outlet of the filter chamber 114 is connected to the inlet of the water pump 150 through a gate valve 151. The filter chamber 114 is provided with an activated carbon filter layer 120, a filter media layer 131, a microporous aeration plate 140 and a sand filter layer 132 from top to bottom.

[0035] The activated carbon filter layer 120 is horizontally movable within the cavity via an elastic component (such as a spring 124) to enhance the dynamic contact between the activated carbon particles and water. Specifically, the inner walls of the tank 110 are provided with parallel upper plates 121 and lower plates 122 on both the left and right sides (i.e., there are two upper plates 121 and two lower plates 122 in total). Limiting posts 123 are provided between the upper plates 121 and the lower plates 122, with a total of two limiting posts 123. The activated carbon filter layer 120 is positioned between the upper plates 121 and the lower plates 122 on both the left and right sides. Each filter layer 120 is provided with through holes, and the limiting post 123 is inserted into the through holes, allowing the activated carbon filter layer 120 to move up and down along the limiting post 123. Each limiting post 123 is fitted with two springs 124, which sandwich the activated carbon filter layer 120 in the middle. When the activated carbon filter layer 120 is impacted by water flow, it moves downward, compressing the lower spring 124. After being compressed to a certain extent, it moves upward again. This causes the activated carbon filter layer 120 to vibrate up and down, enhancing the dynamic contact between the activated carbon particles and water, improving adsorption efficiency, and preventing the gaps between the activated carbon particles from being blocked.

[0036] The activated carbon filter layer 120 includes a frame, with filter screens on both the upper and lower sides of the frame, and activated carbon particles between the two filter screens. The filter screens are used to prevent the filter material from being washed away by the water flow.

[0037] In one embodiment, a herringbone-shaped diversion plate 113 is provided inside the tank 110. The diversion plate 113 is located above the activated carbon filter layer 120 and directly below the water inlet valve 111. The function of the diversion plate 113 is to divert the water to be treated, preventing the water flow from having excessive impact force, which would cause the activated carbon filter layer 120 to be pressed down and unable to vibrate up and down, thus failing to function.

[0038] The filter media layer 131 includes a frame, and filter screens are provided on both the upper and lower sides of the frame. A mixture of quartz sand and anthracite particles is provided between the two layers of filter screens. The mass ratio of the quartz sand to the anthracite particles is 3:1, and the particle size is 0.5-1.5 mm. The filter screens are used to prevent the filter media from being washed away by the water flow.

[0039] An air inlet valve 141 is provided on the side wall of the tank 110. The air inlet valve 141 is connected to the microporous aeration plate 140 and is connected to an external fan through a pipe. The external fan is used to provide aeration and oxygenation to promote the degradation of organic matter by microorganisms. The microporous aeration plate 140 is existing technology, and its specific technical details and principles will not be described in detail.

[0040] The sand filter layer 132 includes a frame, with filter screens on both the upper and lower sides of the frame. Multiple layers of quartz sand filter media are arranged between the two layers of filter screens to intercept suspended particles and colloidal substances. The filter screens are used to prevent the filter media from being washed away by the water flow.

[0041] like Figure 3 , 4 As shown, the composite treatment unit 160 includes a deep activated carbon adsorption chamber 161, a reverse osmosis system chamber 162, an ion exchange reactor chamber 163, and two sets of ultrafiltration membrane module chambers 164 arranged around the circumference. The inlet of the deep activated carbon adsorption chamber 161 is connected to the outlet of the water pump 150, and the outlet of the deep activated carbon adsorption chamber 161 is connected to a second pipe 166 via a first pipe 165. A three-way valve 166A, a three-way valve 166B, a three-way valve 166C, and a four-way valve 166D are sequentially arranged on the second pipe 166. One outlet of the three-way valve 166A is connected to the inlet of the reverse osmosis system chamber 162, one outlet of the three-way valve 166B is connected to the inlet of the ion exchange reactor chamber 163, and one outlet of the three-way valve 166C is connected to the inlet of the third pipe 166D. The outlet of the three-way valve 166D is connected to the inlet of one ultrafiltration membrane module chamber 164, and one outlet of the three-way valve 166D is connected to the inlet of another ultrafiltration membrane module chamber 164. The outlet of the reverse osmosis system chamber 162 is connected to one end of pipe 167, and the other end of pipe 167 is connected to the inlet of gate valve 167A. The outlet of gate valve 167A is connected to pipe 166. The outlet of the ion exchange reactor chamber 163 is connected to one end of pipe 168, and the other end of pipe 168 is connected to the inlet of gate valve 168A. The outlet of gate valve 168A is connected to pipe 166. The outlets of the two sets of ultrafiltration membrane module chambers 164 and the other outlet of the three-way valve 166D are all connected to the ultraviolet disinfection unit 170 through valves.

[0042] The deep activated carbon adsorption chamber 161 is used to adsorb residual organic matter; the reverse osmosis system chamber 162 is equipped with a high-pressure pump and a reverse osmosis membrane module (membrane pore size ≤ 0.1 nm) for removing dissolved salts; the ion exchange reactor chamber 163 is filled with anion / cation exchange resin combination packing to adsorb heavy metal ions; and the ultrafiltration membrane module chamber 164 houses a hollow fiber ultrafiltration membrane module (pore size 0.01-0.1 μm) to retain microorganisms and macromolecular pollutants. Furthermore, the deep activated carbon adsorption chamber 161, reverse osmosis system chamber 162, ion exchange reactor chamber 163, and ultrafiltration membrane module chamber 164 all utilize existing technology and are purchased components; their specific principles and structures will not be elaborated further.

[0043] The disinfection chamber 115 is equipped with an ultraviolet disinfection unit 170, which includes an ultraviolet light source 172 and a transparent glass tube 171 spirally wound around the outer periphery of the ultraviolet light source 172. Several filters 173 are spaced apart inside the transparent glass tube 171. An anatase titanium dioxide catalytic membrane (0.5-2 mm thick, with nano-sized titanium dioxide particles loaded on its surface) is provided on the inner wall of the transparent glass tube 171 and on the filters 173. The inlet of the transparent glass tube 171 is connected to the outlet of the composite treatment unit 160, and the outlet of the transparent glass tube 171 is connected to the outlet valve 112. The short-wave ultraviolet lamp emits 254 nm ultraviolet light, which synergistically generates hydroxyl radicals (•OH) with the anatase titanium dioxide catalytic membrane 53, efficiently degrading organic pollutants and inactivating microorganisms. The final effluent is discharged into the recycled water pipeline through the outlet valve 112.

[0044] A water quality analyzer 191 is installed inside the filtration chamber 114, positioned above the activated carbon filter layer 120. A water quality analyzer 192 is installed at the outlet of the composite treatment unit 160 (i.e., the outlet of the ultrafiltration membrane module chamber 164, which is also the inlet of the ultraviolet disinfection unit 170). Both water quality analyzers 191 and 192 are used to detect water quality indicators such as turbidity, pH value, dissolved oxygen content, organic matter concentration, and specific pollutants. Both water quality analyzers 191 and 192 are purchased components; their specific principles and structures will not be detailed here.

[0045] In addition, the water treatment device 10 also includes a backwashing mechanism 180, which includes a booster pump 181, a three-way valve 182, a three-way valve 183, a gate valve 184, and a purified water connection valve 185. The inlet of the three-way valve 183 is connected to the outlet of the composite treatment unit 160, one outlet of the three-way valve 183 is connected to the inlet of the transparent glass tube 171, the other outlet of the three-way valve 183 is connected to one inlet of the three-way valve 182, the outlet of the purified water connection valve 185 is connected to the other inlet of the three-way valve 182, the inlet of the purified water connection valve 185 is connected to the purified water pipeline in the plant area, the outlet of the three-way valve 182 is connected to the inlet of the booster pump 181, the outlet of the booster pump 181 is connected to the inlet of the gate valve 184 through a pipeline, and the outlet of the gate valve 184 is connected to the bottom of the filter chamber 114.

[0046] The backwashing process is as follows: First, the passage from the purified water connection valve 185 in the three-way valve 182 to the lift pump 181 is opened; then, the gate valve 151 is closed, and the purified water connection valve 185, the gate valve 184, and the drain valve 116 are opened; under the action of the lift pump 181, purified water enters the bottom of the filter chamber 114 along the path of purified water connection valve 185-three-way valve 182-lift pump 181-gate valve 184, and gradually spreads upwards, sequentially backwashing the sand filter layer 132, the microporous aeration plate 140, the filter media layer 131, and the activated carbon filter layer 120. The backwashed wastewater enters the sewage pipe from the drain valve 116, and the backwashing work is completed after a period of time. The backwashing action can significantly extend the maintenance cycle of the water treatment device 10.

[0047] In addition, the backwashing mechanism 180 can also assist the water treatment device 10 in filtration. When the water quality analyzer 192 detects that a certain water quality data of the water filtered by the composite treatment unit 160 is unqualified, it can cooperate with the backwashing mechanism 180 for secondary filtration. The specific process is as follows: First, the passage from the composite treatment unit 160 to the three-way valve 182 in the three-way valve 183 is opened, and the passage from the three-way valve 183 to the lift pump 181 in the three-way valve 182 is opened. Then, the lift pump 181 is started, and the gate valve 151 and the gate valve 184 are opened simultaneously. Then, according to the detection data, more filtration devices in the composite treatment unit 160 are used for filtration. When the water quality analyzer 192 detects that the water quality of the water filtered by the composite treatment unit 160 is qualified, the passage from the composite treatment unit 160 to the transparent glass tube 171 in the three-way valve 183 is opened, and the gate valve 184 is closed.

[0048] In addition, all of the above valves are solenoid valves, and those skilled in the art can select the appropriate model according to the actual situation.

[0049] The water treatment device 10 also includes a control module, which serves as the control center of the water treatment device 10. The control module includes a PLC controller, which is connected to the first water quality analyzer 191 and the second water quality analyzer 192. The PLC controller controls the opening and closing of the valves and water pump 150 via relays. Based on the detection data from the first and second water quality analyzers 191 and 192, the control module automatically controls the opening and closing of the solenoid valves, thereby enabling the selection of one or more combinations of composite treatment units 160 to perform advanced treatment of the incoming greywater for different water quality conditions, and then reuse it. For those skilled in the art, the software implementation of the control module is relatively easy based on the description herein; therefore, specific details will not be elaborated further.

[0050] The specific workflow of this utility model is as follows:

[0051] Startup and Preprocessing:

[0052] The treated wastewater enters the filter chamber 114 through the inlet valve 111. The water quality analyzer 191 monitors the turbidity, pH value, and organic matter concentration of the influent in real time and feeds the data back to the control module.

[0053] If a high level of suspended solids is detected, the control module starts the blower to enhance the oxidative degradation capacity of the biological activated carbon through the microporous aeration plate 140.

[0054] The activated carbon filter layer 120 vibrates periodically up and down under the action of the elastic component to prevent the filter layer from caking and improve the adsorption efficiency.

[0055] The pre-treated wastewater flows into the sand filter layer 132 by gravity to further remove fine particles. Subsequently, the water pump 150 delivers the water to the composite treatment unit 160.

[0056] Deep processing:

[0057] Based on the detection data from the water quality analyzer-191, the control module selects to activate one or more combinations of the reverse osmosis system, ion exchange reactor, or ultrafiltration membrane module: if high salinity is detected (e.g., conductivity > 2000 μS / cm), the reverse osmosis system is activated first; if heavy metal ions exceed the standard (e.g., iron and manganese content > 0.3 mg / L), the ion exchange reactor is activated; if microbial indicators are abnormal (e.g., total colony count > 100 CFU / mL), the ultrafiltration membrane module is activated.

[0058] Water is collected and deeply disinfected. Water quality analyzer 2192 detects the turbidity, dissolved oxygen, and concentration of specific pollutants in the water. If the water quality meets the standards, it flows into water quality analyzer 2192; if it does not meet the standards, it is returned to the upstream unit for reprocessing.

[0059] The following two examples illustrate the workflow of the composite processing unit 160; the rest are similar:

[0060] Example 1: Suppose the water quality analyzer 191 shows abnormal salinity and microbial indicators in the pretreated water, then the composite treatment unit 160 needs to activate the deep activated carbon adsorption chamber 161, the reverse osmosis system chamber 162, and a certain ultrafiltration membrane module chamber 164. Specifically, the passage from pipe 166 in three-way valve 166A to reverse osmosis system chamber 162 is opened, gate valve 167A is opened, the passage from pipe 166 in three-way valve 166B to pipe 166 is opened, gate valve 168A is closed, and the passage from pipe 166 in three-way valve 166C to ultrafiltration membrane module chamber 164 or the passage from pipe 166 in three-way valve 166D is closed. The passage from 166 to the ultrafiltration membrane module chamber 164 is opened; thus, the pretreated wastewater will undergo further treatment along the path of deep activated carbon adsorption chamber 161 -- pipe one 165 -- pipe two 166 -- three-way valve one 166A -- reverse osmosis system chamber 162 -- pipe three 167 -- gate valve two 167A -- pipe two 166 -- three-way valve two 166B -- three-way valve three 166C / three-way valve four 166D -- ultrafiltration membrane module chamber 164. The further treated wastewater then enters the ultraviolet disinfection unit 170. It can be seen that the composite treatment unit 160 of this application provides continuous deep treatment of wastewater without waiting time, resulting in higher efficiency.

[0061] Example 2:

[0062] Assuming the water quality analyzer 191 indicates that the pretreated reclaimed water exceeds the heavy metal ion standard, then the composite treatment unit 160 needs to activate the deep activated carbon adsorption chamber 161 and the ion exchange reactor chamber 163. Specifically, the passage from pipe 166 in three-way valve 166A to pipe 166A is opened, gate valve 167A is closed, the passage from pipe 166 in three-way valve 166B to ion exchange reactor chamber 163 is opened, gate valve 168A is opened, and three-way valve 166C and... All three-way valves 166D open the passage from pipe 166 to pipe 166; thus, the pretreated wastewater will undergo further treatment along the path of deep activated carbon adsorption chamber 161 -- pipe 165 -- pipe 2 166 -- three-way valve 166A -- three-way valve 2 166B -- ion exchange reactor chamber 163 -- pipe 168 -- gate valve 3 168A -- three-way valve 3 166C -- three-way valve 4 166D, and the further treated wastewater enters the ultraviolet disinfection unit 170.

[0063] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A water treatment apparatus (10) based on reuse of intermediate water depths, characterized by: The system includes a tank (110), with an inlet valve (111) at the top and an outlet valve (112) at the lowest point. Inside the tank (110), from top to bottom, are arranged a filter chamber (114), a composite treatment unit (160), and a disinfection chamber (115). The bottom outlet of the filter chamber (114) is connected to the inlet of a water pump (150) via a gate valve (151). Inside the filter chamber (114), from top to bottom, are arranged an activated carbon filter layer (120), a filter media layer (131), a microporous aeration plate (140), and a sand filter layer (132). An air inlet valve (141) is provided on the side wall of the tank (110), which is connected to the microporous aeration plate (140) and to an external fan via a pipe. The composite treatment unit (160) includes a deep activated carbon adsorption chamber (161), a reverse osmosis system chamber (162), an ion exchange reactor chamber (163), and two sets of ultrafiltration membrane module chambers (164) arranged in a circular pattern. The inlet of the deep activated carbon adsorption chamber (161) is connected to the outlet of the water pump (150), and the outlet of the deep activated carbon adsorption chamber (161) is connected to the second pipe (166) via a first pipe (165). A three-way valve (166A), a three-way valve (166B), a three-way valve (166C), and a three-way valve (166D) are sequentially arranged on the second pipe (166). One outlet of the three-way valve (166A) is connected to the inlet of the reverse osmosis system chamber (162), one outlet of the three-way valve (166B) is connected to the inlet of the ion exchange reactor chamber (163), and one outlet of the three-way valve (166C) is connected to the inlet of the third pipe (166D). One outlet of the three-way valve four (166D) is connected to the inlet of one ultrafiltration membrane module chamber (164), and one outlet of the three-way valve four (166D) is connected to the inlet of another ultrafiltration membrane module chamber (164); the outlet of the reverse osmosis system chamber (162) is connected to one end of pipe three (167), the other end of pipe three (167) is connected to the inlet of gate valve two (167A), the outlet of gate valve two (167A) is connected to pipe two (166), the outlet of the ion exchange reactor chamber (163) is connected to one end of pipe four (168), the other end of pipe four (168) is connected to the inlet of gate valve three (168A), the outlet of gate valve three (168A) is connected to pipe two (166), and the outlets of the two sets of ultrafiltration membrane module chambers (164) and the other outlet of the three-way valve four (166D) are all connected to the ultraviolet disinfection unit (170) described below through valves; The disinfection chamber (115) is equipped with an ultraviolet disinfection unit (170). A water quality detector (191) is installed in the filter chamber (114), and the water quality detector (191) is located above the activated carbon filter layer (120); a water quality detector (192) is installed at the outlet of the composite treatment unit (160).

2. The water treatment apparatus (10) based on reclaimed water depth reuse according to claim 1, characterized in that: The bottom of the filter chamber (114) has a funnel-shaped structure.

3. A water treatment device (10) based on reclaimed water depth reuse according to claim 1, characterized in that: The inner wall of the tank (110) is provided with an upper plate (121) and a lower plate (122) that are parallel to each other on both the left and right sides. A limiting post (123) is provided between the upper plate (121) and the lower plate (122). The activated carbon filter layer (120) is provided between the upper plate (121) and the lower plate (122) on both the left and right sides. The activated carbon filter layer (120) is provided with through holes on both the left and right sides. The limiting post (123) is inserted into the through hole. Two springs (124) are sleeved on each limiting post (123). The two springs (124) sandwich the activated carbon filter layer (120) in the middle.

4. The water treatment apparatus (10) based on reclaimed water depth reuse according to claim 1, characterized in that: The tank (110) is provided with a herringbone-shaped diversion plate (113), which is located above the activated carbon filter layer (120) and directly below the water inlet valve (111).

5. The water treatment device (10) based on reclaimed water depth reuse according to claim 1, characterized in that: The ultraviolet disinfection unit (170) includes an ultraviolet light source (172) and a transparent glass tube (171) spirally wound around the outer periphery of the ultraviolet light source (172). A number of filters (173) are arranged at intervals inside the transparent glass tube (171). Anatase titanium dioxide catalytic membranes are provided on the inner wall of the transparent glass tube (171) and on the filters (173).

6. The water treatment device (10) based on reclaimed water depth reuse according to claim 1, characterized in that: A drain valve (116) is provided on the top of the tank (110).

7. A water treatment apparatus (10) based on reclaimed water depth reuse according to claim 5, characterized in that: The water treatment device (10) further includes a backwashing mechanism (180), which includes a booster pump (181), a three-way valve five (182), a three-way valve six (183), a gate valve four (184), and a purified water connection valve (185). The inlet of the three-way valve six (183) is connected to the outlet of the two ultrafiltration membrane module chambers (164), and one outlet of the three-way valve six (183) is connected to the inlet of the transparent glass tube (171). The other outlet of valve six (183) is connected to one inlet of the three-way valve five (182), the outlet of the water purification connection valve (185) is connected to the other inlet of the three-way valve five (182), the outlet of the three-way valve five (182) is connected to the inlet of the booster pump (181), the outlet of the booster pump (181) is connected to the inlet of the gate valve four (184) through a pipe, and the outlet of the gate valve four (184) is connected to the bottom of the filter chamber (114).

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