Intelligent capital construction water circulation system

Abstract

The invention relates to the technical field of geological capital construction, and discloses an intelligent capital construction water circulation system which comprises an intelligent control unit, and a purified water circulation treatment unit, a medicament supply unit and a wastewater circulation treatment unit which are electrically connected with the intelligent control unit and controlled by the intelligent control unit. By means of multi-channel water source supply, multi-gradient and multi-latitude treatment and sewage reuse, the water circulation utilization rate of a construction site is greatly increased, consumption of purified water is reduced, wastewater reuse is improved, emission of harmful substances is reduced, and pollution to the environment and soil is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of geological infrastructure, in particular to the technical field of recycling of construction site water resources in geological treatment of impervious curtain walls, and specifically relates to an intelligent infrastructure water circulation system. Background Art

[0002] The geological treatment of impervious curtain walls is usually achieved through drilling, grouting or diaphragm wall construction. The process mainly includes site investigation, trench excavation, injection of impervious materials, wall curing and other links. The wastewater generated during the construction mainly includes drilling flush wastewater, waste mud, equipment cleaning wastewater and suspended solid-containing wastewater formed by rainwater scouring. These wastewaters often contain high-concentration suspended solids (SS), alkaline substances (pH 9 - 12), trace heavy metals and organic additives. Existing technologies mostly adopt hierarchical treatment: first, large particles are removed through sedimentation tanks or hydrocyclones, and then flocculants are added for coagulation-flocculation treatment to reduce the concentration of suspended solids; sulfuric acid or carbon dioxide is used to neutralize and adjust alkaline wastewater, and ion exchange resins or sodium sulfide precipitation methods are introduced for heavy metal-containing wastewater. Finally, sludge reduction is achieved through pressure filtration and dehydration, and the treated water can be reused for construction dust suppression or equipment cleaning or discharged after disinfection. For the sewage of equipment cleaning, a sedimentation tank for storing clean water is generally built at the construction site, and the sewage after cleaning is sedimented. The supernatant after sedimentation is mostly treated by direct discharge, and the precipitated solid sand and gravel are generally used for on-site soil slope piling without special treatment. Due to the attachment of a large amount of mud in the internal pipelines of the pulping and slurry delivery equipment, the mud contains various chemical reagents. Although the sedimentation of the cleaning sewage can effectively separate the solid components in the mud, the supernatant after sedimentation also contains a large amount of chemical reagents, and direct discharge will still cause damage to the geological soil, making the soil harden. For construction sites with a long construction period, the cumulative amount of discharged sewage will be very large, and the geological environment pollution of the construction area will also increase. Summary of the Invention

[0003] In order to solve the problems of large amount of sewage generation, incomplete treatment and low recycling rate existing in the existing geological impervious wall infrastructure, the present application provides an intelligent infrastructure water circulation system, mainly by improving the utilization rate of sewage and wastewater, reducing the consumption of clean water, reducing the sewage discharge amount, and reducing the pollution and damage caused by construction to the geological environment.

[0004] In order to achieve the above object, the technical solution adopted in the present application is as follows:

[0005] An intelligent infrastructure water circulation system includes an intelligent control unit, a purified water circulation treatment unit, a chemical agent supply unit, and a wastewater circulation treatment unit that are electrically connected to the intelligent control unit and controlled by the intelligent control unit. Among them, the intelligent control unit is the processing center for the autonomous and intelligent operation of the entire system. It is used to read and process the information collected by different front-end sensors and send corresponding driving electrical signal instructions to the backend execution devices, making it the computing center for the autonomous operation of the entire system. This part of the hardware structure is prior art and can be implemented using commercially available integrated processing units, such as PLC logic controllers, PCs, etc., and is not the improvement point of the present invention. The present invention only proposes a new solution based on the structure of the sewage treatment system with automatic control. Specifically,

[0006] The purified water circulation treatment unit includes a plurality of rainwater collection mechanisms arranged on the surface of the infrastructure construction site for collecting rainwater, a rainwater sedimentation tank for storing the rainwater from the rainwater collection mechanisms, an adjustment tank and a water storage tank that are sequentially connected to the rainwater sedimentation tank. The water storage tank is also respectively connected to a purified water inlet pipe and a purified water outlet pipe; the purified water circulation treatment unit realizes the dual water sources of tap water / well water and rainwater as the sources. After the solid-liquid separation and water quality adjustment of the water sources, it is used as purified water for the construction site project. Among them, the rainwater collection mechanisms are spread throughout the entire construction site and can naturally collect a large amount of rainwater sources, greatly reducing the manual supply of purified water. It saves a large amount of energy consumption for the manual supply of purified water. Especially for the construction sites on high mountain terrains, the purified water sources often require a high lift and pipelines for water supply.

[0007] The chemical agent supply unit includes a chemical agent tank having a plurality of independent chambers for containing different chemical agents. Any one of the chambers is respectively connected to chemical agent pipe A, chemical agent pipe B, and chemical agent pipe C through metering pumps; the chemical agent supply unit is a device for providing chemical reagents required for the entire system to chemically treat sewage. According to different process nodes and the characteristics of different sewage, it quantitatively provides corresponding chemical reagents for flocculation, neutralization, pH value adjustment, etc.

[0008] The wastewater circulation treatment unit includes a slurry pond for temporarily storing construction return slurry, a filter press for solid-liquid separation of the slurry in the slurry pond, a primary filtrate pond, a centrifugal separator, a secondary filtrate pond, and an electrochemistry neutralization pond that are used to process the filtrate separated by the filter press and are sequentially connected. A controllable water outlet is provided on the electrochemistry neutralization pond;

[0009] Chemical agent pipe A is connected to the adjustment tank, chemical agent pipe B is connected to the secondary filtrate pond, and chemical agent pipe C is connected to the primary filtrate pond. It is used to adjust and treat the water in the adjustment tank, secondary filtrate pond, and primary filtrate pond respectively.

[0010] In order to collect as much rainwater as possible more comprehensively and reduce the supply of purified water, preferably, the rainwater collection mechanism includes a plurality of rainwater collection ports arranged around the construction site and / or in the intermediate staggered area. Any rainwater collection port is communicated with the rainwater sedimentation tank through a rainwater pipe, and any rainwater pipe is inclined towards one end close to the rainwater sedimentation tank.

[0011] Further preferably, a first water level sensor, a second water level sensor, and a third water level sensor for sending electric signals of water level information to the intelligent control unit are respectively arranged in the rainwater sedimentation tank, the regulating tank, and the water storage tank, and a first water pump and / or a one-way valve are arranged between the rainwater sedimentation tank and the regulating tank, and a second water pump is arranged between the regulating tank and the water storage tank.

[0012] Still further, the slurry pit is communicated with the feed inlet of the filter press through a slurry pump, and the slurry pump is electrically connected to the intelligent control unit.

[0013] In order to improve the separation efficiency of flocs and reduce the difficulty of removing flocs, preferably, the centrifugal separator includes a centrifugal cylinder that realizes solid-liquid separation through rotation. The centrifugal cylinder is composed of pairs of longitude fins arranged along the axial direction of the centrifugal cylinder and distributed in a circumferential array, and a plurality of latitude mesh rings used to fix the longitude fins and arranged at intervals along the axial direction. The gap between two adjacent longitude fins is less than 1 mm, the gap between two adjacent latitude mesh rings is less than 3 mm, and the difference between the inner diameter R1 of the latitude mesh ring and the inner diameter R2 of the longitude fin array is greater than 2 mm. The above-mentioned centrifugal separator is one of the creative points of the present invention. In particular, the structure of the centrifugal cylinder is completely different from the prior art. Most of the existing physical filter meshes are in the form of horizontal and vertical intersections or inclined intersections to form rectangular or other-shaped filter holes, but the entire mesh screen or mesh surface is almost in the same plane. The separated solids can contact both the horizontal structure and the vertical structure of the screen. Such a structure is not inappropriate at the beginning of filtration and can effectively separate flocs from water. However, as more and more flocs are filtered, the disadvantages become apparent. When there are more and more flocs, the flocs will block the surface of the entire mesh screen, resulting in a significant decrease in filtration efficiency. At the same time, since the flocs are fibrous, some flocs will pass through the mesh screen along the mesh holes, but due to the characteristics of their flocculent structure, they cannot completely pass through the mesh screen, causing the mesh holes to be blocked and requiring regular cleaning. During cleaning, although most of the flocs will be blocked on the water-facing side of the mesh screen, some flocs will pass through the mesh holes to the backwater side. During cleaning and flushing, the flocs will not be quickly washed away. Coupled with the small mesh holes, the cleaning difficulty is quite large. Even through backwashing, the soft flocs will cause the problem of hanging on the mesh due to passing through the mesh holes, which will greatly reduce the filtration efficiency and the filtration volume per unit time. The present invention changes the traditional flat mesh screen structure and adopts a three-dimensional mesh screen design. The mesh screen structure is composed of longitude fins and latitude mesh rings. Among them, the longitude fins protrude significantly towards the incoming water direction from the latitude mesh rings. This makes it so that during centrifugal filtration, the structure in contact with the flocs is mainly the longitude fins, and the latitude mesh rings only play an auxiliary role in blocking the flocs, but most of the flocs will be blocked when contacting the longitude fins. The advantage of adopting the above structure is that when the flocs adhere to the surface of the longitude fins, only by flushing along the length direction of the longitude fins, due to the absence of the action of lateral resistance, the flocs will quickly slide down along the longitude fins, achieving the purpose of efficiently cleaning the flocs.

[0014] In order to improve the sewage treatment effect, preferably, the chemical agent tank includes chemical agent chambers for separately containing a main flocculant, a coagulant aid, a pH regulator, a synergist, and a conditioner; the main flocculant is cationic polyacrylamide, the coagulant aid is polyaluminum chloride, the pH regulator is dilute sulfuric acid or lime milk, the synergist is potassium persulfate or Fenton reagent, and the conditioner is chlorine dioxide or sodium hypochlorite.

[0015] Beneficial effects:

[0016] 1. By integrating rainwater collection and purifying water input as the source of all water used at the construction site, the present invention greatly reduces the supply difficulty and resource input of using pure tap water or supplied water as the purified water source in traditional construction sites. Since most of the address treatment construction sites are located on mountains, there are generally no ready-made water sources available, and artificial lifting supply is required, such as lifting supply from nearby barrier lakes, rivers, etc. to the construction site, which will consume a large amount of equipment and energy input, resulting in a high water use cost.

[0017] 2. The present invention provides a brand-new centrifugal separator with a three-dimensional mesh sieve structure, which can quickly separate flocs from water through the three-dimensional mesh sieve structure composed of longitude fins and latitude mesh rings. At the same time, due to the use of the three-dimensional mesh sieve structure, the contact area between the flocs and the longitude fins is very small, and they hardly contact the latitude mesh rings, which can not only ensure the filtration effect but also improve the convenience of floc cleaning, greatly improving the filtration efficiency of flocs per unit time.

[0018] 3. Through multi-channel water source supply, multi-gradient and multi-latitude treatment and realizing sewage reuse, the present invention greatly improves the water circulation utilization rate of the construction site, reduces the consumption of purified water, improves the reuse of wastewater, reduces harmful substance emissions, and reduces pollution to the environment and soil. Brief description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0021] Figure 2 It is a cross-sectional view of the centrifugal cylinder.

[0022] Figure 3 It is Figure 2 The enlarged view of the structure in area A in

[0023] Figure 4 It is a block diagram of the water treatment process of the purified water circulation treatment unit.

[0024] Figure 5 It is a block diagram of the water treatment process of the wastewater circulation treatment unit.

[0025] In the figure: 10 - water purification circulation treatment unit; 11 - rainwater collection mechanism; 12 - rainwater sedimentation tank; 13 - one-way valve; 14 - first water pump; 15 - regulation tank; 16 - second water pump; 17 - water storage tank; 18 - purified water inlet pipe;

[0026] 20 - chemical agent supply unit; 21 - chemical agent tank; 22 - chemical agent pipe A; 23 - chemical agent pipe B; 24 - chemical agent pipe C;

[0027] 30 - wastewater circulation treatment unit; 31 - slurry pond; 32 - slurry pump; 33 - filter press; 34 - primary filtrate pond; 35 - centrifugal separator; 351 - centrifugal cylinder; 3511 - longitude fins; 3512 - latitude net ring; 36 - secondary filtrate pond; 37 - electrochemical neutralization pond; 38 - water outlet. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, in the description of the present application, if terms such as "first", "second", etc. are used only for differential description and cannot be understood as indicating or implying relative importance.

[0032] In addition, in the description of this application, if terms such as "horizontal" and "vertical" appear, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0033] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0034] Embodiment 1:

[0035] This embodiment provides an intelligent infrastructure water circulation system. Refer to the structural schematic diagram shown in the attached Figure 1 description. Specifically, it includes an intelligent control unit, and a purified water circulation treatment unit 10, a chemical agent supply unit 20, and a wastewater circulation treatment unit 30 that are electrically connected to the intelligent control unit and controlled by the intelligent control unit. Among them, the intelligent control unit is the processing center for the autonomous and intelligent operation of the entire system, used to read and process the information collected by different front-end sensors, and send corresponding driving electrical signal instructions to the back-end execution devices, so that the entire system can be an autonomous operation computing center. This part of the hardware structure is prior art and can be implemented by commercially available integrated processing units, such as PLC logic controllers, PCs, etc., and is not an improvement point of the present invention. The present invention only proposes a new solution based on the automated control in the sewage treatment system structure. Specifically,

[0036] the purified water circulation treatment unit 10 includes a plurality of rainwater collection mechanisms 11 arranged on the surface of the infrastructure construction site for collecting rainwater, a rainwater sedimentation tank 12 for storing the rainwater from the rainwater collection mechanisms 11, a regulating tank 15 and a water storage tank 17 that are sequentially connected to the rainwater sedimentation tank 12. The water storage tank 17 is also respectively connected to a purified water inlet pipe 18 and a purified water outlet pipe; the purified water circulation treatment unit 10 realizes the dual water sources of tap water / well water and rainwater as the source, and after solid-liquid separation and water quality adjustment of the water source, it is used as purified water for the construction site project. Among them, the rainwater collection mechanisms 11 are spread throughout the entire construction site and can naturally collect a large amount of rainwater sources, greatly reducing the manual supply of purified water. It saves a large amount of energy consumption for the manual supply of purified water. Especially for mountain construction sites with higher terrain, the purified water source often requires a higher lift and pipeline for water supply. Further refer to Figure 2 andFigure 4 As shown, when it rains, rainwater is collected and converged by the rainwater collection mechanism 11 and finally introduced into the rainwater sedimentation tank 12 for natural sedimentation. No energy consumption is required during this process. Then, after the rainwater is statically sedimented, the sedimented rainwater is guided to the regulation tank 15 by natural pressure difference or water pump for rainwater regulation, achieving the effect of water quality treatment. The water after regulation treatment basically reaches the effect of tap water, and then the water is transported to the water storage tank 17 for standby by means of water pump diversion. Among them, whether the water in the water storage tank 17 is supplied by the natural pressure difference of the water tower or the pressurization device is determined according to the actual site and application scenario, and there is no technical limitation here. Since the construction project site is relatively small, generally, the water storage tank 17 is preferably placed or built at a higher position and supplied with pressure difference, which can save more energy and reduce energy consumption for the water use of the construction site during long-term construction. By integrating rainwater collection and purified water input as all water sources for the construction site, the supply difficulty and resource input of using pure tap water or supply water as the purified water source in traditional construction sites are greatly reduced.

[0037] The chemical agent supply unit 20 includes a chemical agent tank 21 having a plurality of independent chambers for containing different chemical agents. Any one of the chambers is respectively connected to a chemical agent pipe A22, a chemical agent pipe B23, and a chemical agent pipe C24 through a metering pump; the chemical agent supply unit 20 is a device for providing chemical reagents required for the entire system to treat sewage chemically. According to different process nodes and the characteristics of different sewage, corresponding chemical reagents are quantitatively provided for flocculation, neutralization, pH value adjustment, etc.

[0038] The wastewater recycling and treatment unit 30 includes a slurry tank 31 for temporarily storing construction backflow slurry, a filter press 33 for separating the slurry in the slurry tank 31 into solid and liquid, a primary filtrate tank 34, a centrifugal separator 35, a secondary filtrate tank 36, and an electrochemically neutralizing tank 37 that are connected in sequence for treating the filtrate separated by the filter press 33. A controllable water outlet 38 is provided on the electrochemically neutralizing tank 37;

[0039] The chemical agent pipe A22 is communicated with the regulation pool 15, the chemical agent pipe B23 is communicated with the secondary filtrate pool 36, and the chemical agent pipe C24 is communicated with the primary filtrate pool 34. They are used to adjust and treat the water in the regulation pool 15, the secondary filtrate pool 36 and the primary filtrate pool 34 respectively. Since the water source in the regulation pool 15 is rainwater, the water body in the primary filtration pool 34 is mainly mud filtrate, and the water body in the secondary filtration pool 36 is the filtrate after flocculation. The types of chemical ions or pollutants contained in the above three water bodies are basically determined, only the content or concentration is different. Therefore, as long as targeted sensing devices are installed in the corresponding water bodies, and the concentration of the corresponding pollutants in the current water body is collected in real time through the sensing devices, the actual amount of purified water can be supplied quantitatively. The chemical agent supply unit 20 can provide a quantitative specific type of chemical agent into the chemical agent pipe A22, the chemical agent pipe B23 and the chemical agent pipe C24, so as to achieve targeted treatment. In this way, the treatment efficiency, effect and reagent consumption are all at a better level, and the finally obtained treated water quality is also the best. There will be no problem of reagent surplus pollution caused by mismatched types of treatment reagents, too high concentration or content, nor will there be problems of introducing new pollutants or incomplete treatment caused by non-targeted reagent types or insufficient reagents.

[0040] Embodiment 2:

[0041] In order to collect as much rainwater as possible more comprehensively and reduce the supply amount of purified water, further combined with the attached Figure 1 - Figure 5 shown in the figure, in this embodiment, the rainwater collection mechanism 11 includes a plurality of rainwater collection ports arranged around and / or in the staggered areas in the middle of the construction site. Any rainwater collection port is communicated with the rainwater sedimentation tank 12 through a rainwater pipe, and any rainwater pipe is inclined towards one end close to the rainwater sedimentation tank 12. Not shown in the figure, in order to maximize the efficiency of the solution provided in this embodiment, the ground surface in the entire rainwater collection area is set with a hard ground, and the rainwater collection ports are installed according to the lower points, so as to ensure as much and clean rainwater collection as possible. The process of rainwater collection can be generally summarized as follows: rainwater falls to the ground, then is diverted to the lower rainwater collection ports through the hard ground, and then the rainwater is converged into the rainwater sedimentation tank 12 through the pipes for sedimentation to achieve the purpose of removing sediment and solid-liquid separation.

[0042] Further, a first water level sensor, a second water level sensor, and a third water level sensor for sending water level information electrical signals to the intelligent control unit are respectively arranged in the rainwater sedimentation tank 12, the regulating tank 15, and the water storage tank 17, and a first water pump 14 and / or a check valve 13 are arranged between the rainwater sedimentation tank 12 and the regulating tank 15, and a second water pump 16 is arranged between the regulating tank 15 and the water storage tank 17. Among them, the functions of the first water level sensor, the second water level sensor, and the third water level sensor are to collect the water level information in the rainwater sedimentation tank 12, the regulating tank 15, and the water storage tank 17 in real time, make full use of their respective spaces, and avoid problems such as the regulating tank 15 being full of water, the water level in the water storage tank 17 being low, and excessive dependence on purified water input resulting in increased energy consumption; and the water level in the rainwater sedimentation tank 12 being high, the water level in the regulating tank 15 being low, and sudden heavy rain causing the rainwater sedimentation tank 12 to be unable to receive it, and the regulating tank 15 not adjusting in time, resulting in the water source not being able to make the most of the rainwater due to uneven coordination of the treatment process. Installing water level sensors in the above three tanks can achieve the greatest coordination and supply water to the water storage tank 17 with the greatest efficiency, and be ready to receive and process new rainwater at any time, thereby reducing the dependence on artificial purified water input.

[0043] Still further, the slurry tank 31 is communicated with the feed inlet of the filter press 33 through a slurry pump 32, and the slurry pump 32 is electrically connected to the intelligent control unit.

[0044] In order to improve the separation efficiency of flocs and reduce the difficulty of removing flocs, preferably, the centrifugal separator 35 includes a centrifugal cylinder 351 that realizes solid-liquid separation through rotation. The centrifugal cylinder 351 is composed of pair of sheet longitude fins 3511 arranged along the axial direction of the centrifugal cylinder 351 and distributed in a circumferential array, and a plurality of latitude mesh rings 3512 for fixing the longitude fins 3511 and arranged at intervals along the axial direction. The gap between two adjacent longitude fins 3511 is less than 1 mm, the gap between two adjacent latitude mesh rings 3512 is less than 3 mm, and the difference between the inner diameter R1 of the latitude mesh ring 3512 and the inner diameter R2 of the longitude fin 3511 array is greater than 2 mm. The above-mentioned centrifugal separator 35 is one of the creative points of the present invention. In particular, the structure of the centrifugal cylinder 351 is completely different from the prior art. Existing physical filter meshes mostly have rectangular or other-shaped filter holes formed by horizontal and vertical interweaving or inclined interweaving, but the entire mesh screen or mesh surface is almost in the same plane. The separated solids can contact both the horizontal structure and the vertical structure of the screen. Such a structure is not inappropriate at the beginning of filtration and can effectively separate flocs from water. However, as more and more flocs are filtered, the disadvantages become apparent. When there are more and more flocs, the flocs will block the surface of the entire mesh screen, resulting in a significant decrease in filtration efficiency. At the same time, since the flocs are fibrous, some flocs will pass through the mesh screen along the mesh holes, but due to the characteristics of their flocculent structure, they cannot completely pass through the mesh screen, causing the mesh holes to be blocked and requiring regular cleaning. During cleaning, although most flocs will be blocked on the water-facing side of the mesh screen, some flocs will pass through the mesh holes to the back side. During cleaning and rinsing, the flocs will not be quickly washed away. Coupled with the small mesh holes, the cleaning difficulty is quite large. Even through backwashing, the soft flocs will cause the problem of hanging on the mesh due to passing through the mesh holes, which will greatly reduce the filtration efficiency and the filtration volume per unit time. The present invention changes the traditional planar mesh screen structure and adopts a three-dimensional mesh screen design. The mesh screen structure is composed of longitude fins 3511 and latitude mesh rings 3512. Among them, the longitude fins 3511 protrude significantly towards the incoming water direction from the latitude mesh rings 3512. This makes it mainly the longitude fins 3511 that come into contact with the flocs during centrifugal filtration, and the latitude mesh rings 3512 only play an auxiliary role in blocking the flocs, but most flocs will be blocked when coming into contact with the longitude fins 3511. The advantage of adopting the above structure is that when the flocs adhere to the surface of the longitude fins 3511, only by flushing along the length direction of the longitude fins 3511, due to the absence of the action of lateral resistance, the flocs will quickly slide down along the longitude fins 3511, achieving the purpose of efficiently cleaning the flocs.

[0045] To improve the sewage treatment effect, preferably, the chemical agent tank 21 includes chemical agent chambers respectively containing a main flocculant, a coagulant aid, a pH regulator, a synergist and a conditioner; the main flocculant is cationic polyacrylamide, the coagulant aid is polyaluminum chloride, the pH regulator is dilute sulfuric acid or lime milk, the synergist is potassium persulfate or Fenton's reagent, and the conditioner is chlorine dioxide or sodium hypochlorite.

[0046] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An intelligent infrastructure water circulation system, comprising an intelligent control unit, and a purified water circulation treatment unit (10), a chemical agent supply unit (20) and a wastewater circulation treatment unit (30) that are electrically connected to the intelligent control unit and controlled by the intelligent control unit, characterized in that: The purified water circulation treatment unit (10) includes a plurality of rainwater collection mechanisms (11) arranged on the surface of the infrastructure construction site for collecting rainwater, a rainwater sedimentation tank (12) for storing rainwater from the rainwater collection mechanisms (11), a regulating tank (15) and a water storage tank (17) that are sequentially communicated with the rainwater sedimentation tank (12), and the water storage tank (17) is also respectively communicated with a purified water inlet pipe (18) and a purified water outlet pipe; The chemical agent supply unit (20) includes a chemical agent tank (21) having a plurality of independent chambers for containing different chemical agents, and any one of the chemical agent chambers is respectively communicated with a chemical agent pipe A (22), a chemical agent pipe B (23) and a chemical agent pipe C (24) through a metering pump; The wastewater circulation treatment unit (30) includes a slurry pond (31) for temporarily storing construction return slurry, a filter press (33) for separating solid and liquid in the slurry in the slurry pond (31), a primary filtrate pond (34), a centrifugal separator (35), a secondary filtrate pond (36) and an electrochemical neutralization pond (37) that are used for treating the filtrate separated by the filter press (33) and are sequentially communicated, and a controllable water outlet (38) is arranged on the electrochemical neutralization pond (37); The chemical agent pipe A (22) is communicated with the regulating tank (15), the chemical agent pipe B (23) is communicated with the secondary filtrate pond (36), and the chemical agent pipe C (24) is communicated with the primary filtrate pond (34).

2. The intelligent infrastructure water circulation system according to claim 1, wherein: The rainwater collection mechanism (11) includes a plurality of rainwater collection ports arranged around and / or in the staggered area in the middle of the construction site, and any one of the rainwater collection ports is communicated with the rainwater sedimentation tank (12) through a rainwater pipe, and any one of the rainwater pipes is inclined towards the end close to the rainwater sedimentation tank (12).

3. The intelligent infrastructure water circulation system according to claim 2, characterized in that: A first water level sensor, a second water level sensor and a third water level sensor for sending an electric signal of water level information to the intelligent control unit are respectively arranged in the rainwater sedimentation tank (12), the regulating tank (15) and the water storage tank (17), and a first water pump (14) and / or a one-way valve (13) are arranged between the rainwater sedimentation tank (12) and the regulating tank (15), and a second water pump (16) is arranged between the regulating tank (15) and the water storage tank (17).

4. An intelligent infrastructure water circulation system according to claim 1, characterized in that: The slurry pond (31) is communicated with the feed inlet of the filter press (33) through a slurry pump (32), and the slurry pump (32) is electrically connected to the intelligent control unit.

5. An intelligent infrastructure water circulation system according to claim 1, characterized in that: The centrifugal separator (35) includes a centrifugal cylinder (351) that realizes solid-liquid separation by rotation. The centrifugal cylinder (351) is composed of pair of sheet longitude fins (3511) arranged along the axial direction of the centrifugal cylinder (351) and distributed in a circumferential array, and a plurality of latitude mesh rings (3512) for fixing the longitude fins (3511) and arranged at intervals along the axial direction. The gap between adjacent two longitude fins (3511) is less than 1 mm, the gap between adjacent two latitude mesh rings (3512) is less than 3 mm, and the difference between the inner diameter R1 of the latitude mesh ring (3512) and the inner diameter R2 of the longitude fin (3511) array is greater than 2 mm.

6. An intelligent infrastructure water circulation system according to claim 1, characterized in that: The chemical agent tank (21) includes chemical agent chambers for containing a main flocculant, a coagulant aid, a pH regulator, a synergist, and a conditioner respectively; the main flocculant is cationic polyacrylamide, the coagulant aid is polyaluminum chloride, the pH regulator is dilute sulfuric acid or lime milk, the synergist is potassium persulfate or Fenton reagent, and the conditioner is chlorine dioxide or sodium hypochlorite.

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