Zero discharge sewage recycling system

Abstract

The utility model discloses a kind of sewage zero discharge circulating systems, it is related to sewage treatment technical field.Sewage zero discharge circulating system includes living area, production area, sewage collection unit, sewage treatment station and water supply pipe network, wherein, production area includes material water washing unit and unloading dust unit;Sewage collection unit is used to collect the sewage generated by living area and production area;Sewage treatment station is communicated with sewage collection unit, for processing sewage, and for output clean water;Water supply pipe network is used to send clean water to material water washing unit and unloading dust unit respectively.By the system, the sewage generated by living area and production area can be reused, and the clean water after purification can be used as production water for production area continuously, avoiding using self-purchased clean water in production area continuously, so as to alleviate the pressure of water resource shortage in water shortage area, reduce water cost, and ensure the stability of water use in production area, so as to ensure the sustainable development of production enterprise.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater zero-discharge recycling system. Background Technology

[0002] To facilitate mining and processing, some industrial silicon production plants are located in severely water-scarce areas. However, the production process of silica consumes a vast amount of water, leading to high water and environmental costs for industrial silicon producers. Currently, wastewater generated in industrial silicon production plants is difficult to effectively integrate and utilize, resulting in low water resource utilization and persistently high water costs. The combined effects of regional factors and the nature of production are detrimental to the sustainable development of these enterprises.

[0003] In view of this, the present invention proposes a zero-discharge wastewater recycling system to solve or at least alleviate the above-mentioned problems. Utility Model Content

[0004] The main purpose of this invention is to propose a zero-discharge wastewater recycling system, which aims to improve the water resource utilization rate of industrial silicon production plants and promote the sustainable development of the plants.

[0005] To achieve the above objectives, this utility model proposes a zero-discharge wastewater recycling system, which includes a living area, a production area, a wastewater collection unit, a wastewater treatment plant, and a water supply network. The production area is equipped with a material washing unit and an unloading dust suppression unit; the wastewater collection unit includes parallel domestic wastewater collection networks and production wastewater collection networks. The domestic wastewater collection network is laid in the living area to collect domestic wastewater generated in this area; the production wastewater collection network is laid in the material washing unit and the unloading dust suppression unit to collect the production wastewater generated in these two units. Domestic wastewater and production wastewater merge to form mixed wastewater. The wastewater treatment plant is connected to the wastewater collection unit, responsible for treating the mixed wastewater and outputting clean water, while the water supply network transports the clean water to the material washing unit and the unloading dust suppression unit.

[0006] In one embodiment, the zero-discharge wastewater recycling system further includes a clean water storage station equipped with a storage tank. The storage tank has an inlet side and an outlet side, with the inlet side connected to the wastewater treatment plant and the outlet side connected to the water supply network. The main function of the storage tank is to store clean water. This allows for the storage of a certain amount of clean water for continuous use in the production area.

[0007] In one embodiment, the clean water storage station further includes a level sensor installed on the side wall of the storage tank. This allows managers to monitor the amount of clean water stored in the tank, enabling dynamic adjustments to the wastewater treatment rate and preventing clean water overflow and waste.

[0008] In one embodiment, the wastewater treatment plant is composed of a booster pump, a wastewater equalization tank, a primary treatment device, a secondary treatment device, and a clear water tank connected in sequence. Specifically, the wastewater equalization tank is connected to the wastewater collection unit, and its main function is to regulate the water quality of the wastewater and control the amount of water entering the primary treatment device, while outputting the primary treated water after preliminary treatment.

[0009] The booster pump is installed between the sewage equalization tank and the primary treatment unit to transport sewage;

[0010] The primary treatment unit is responsible for receiving the pre-treated wastewater and converting it into secondary treated water.

[0011] The secondary treatment unit receives the secondary treated water and further processes it to produce clean water;

[0012] The clear water tank is used to temporarily store clean water and is connected to the liquid storage tank.

[0013] In this way, wastewater can be treated into clean water that meets standards, so that it can be used in production.

[0014] More specifically, in one embodiment, the primary treatment device consists of an aeration blower and a primary sedimentation tank, a multi-stage contact oxidation tank and a secondary sedimentation tank connected in sequence, while the secondary treatment device consists of a filtration tank and a disinfection tank connected in sequence.

[0015] The primary sedimentation tank is connected to the wastewater equalization tank and receives wastewater. Its main function, together with the secondary sedimentation tank, is to separate solids from liquids in the wastewater. The multi-stage contact oxidation tank is responsible for decomposing organic matter in the wastewater, and the aeration blower supplies oxygen to the multi-stage contact oxidation tank. The secondary sedimentation tank is connected to the filtration tank, which contains a filter layer for filtering the secondary treated water. The disinfection tank is used to kill pathogens in the secondary treated water and generate clean water; it is connected to the clear water tank. In this way, organic matter, pathogens, and solid particles in the wastewater can be effectively removed, ultimately producing clean water.

[0016] In one embodiment, a primary sedimentation tank, a multi-stage contact oxidation tank, and a secondary sedimentation tank are sequentially connected to form a primary treatment line. The primary treatment unit includes at least two parallel primary treatment lines, and a wastewater equalization tank is connected to at least two primary treatment lines. This configuration gives the wastewater treatment plant advantages such as high capacity and flexible operation.

[0017] Furthermore, the unloading dust suppression unit serves to reduce dust during truck unloading. In one embodiment, the unloading dust suppression unit comprises a main pipeline, at least one branch pipeline, and at least one dust suppression structure. The dust suppression structure includes multiple top spray pipelines, multiple top spray nozzles, multiple side spray pipelines, and multiple side spray nozzles. The top spray nozzles are arranged sequentially and installed on the top spray pipelines, and the side spray nozzles are arranged sequentially and installed on the side spray pipelines. The side spray pipelines are arranged opposite each other, and the multiple top spray pipelines and multiple side spray pipelines together form a portal structure. The branch pipelines are connected to the main pipeline, and each branch pipeline corresponds to a dust suppression structure. Both the top spray pipelines and the side spray pipelines are connected to their corresponding branch pipelines. This allows the rear of the truck to pass through the portal structure during unloading, achieving all-around dust suppression.

[0018] In one embodiment, the unloading dust suppression unit further includes secondary pipelines and a ground dust suppression structure, wherein the ground dust suppression structure is used to wash the ground. The secondary pipelines are connected to the main pipeline, and the ground dust suppression structure consists of a primary ground pipe and multiple secondary ground pipes. The primary ground pipes are connected to the secondary pipelines, while the multiple secondary ground pipes are connected to the primary ground pipes and are evenly spaced on the ground. This arrangement can prevent the accumulation of dust on the ground.

[0019] In one embodiment, the unloading dust suppression unit is also equipped with a filter installed on the branch lines and secondary lines. This filter can remove solid impurities from the cleaning water, preventing the cleaning water from clogging the water mist nozzles and secondary ground pipes.

[0020] To avoid wasting clean water due to production shutdowns, in one embodiment, the zero-discharge wastewater recycling system also includes a greening unit connected to the water supply network. Thus, when excess clean water is needed, it can be sprayed onto the greenery within the factory, further preventing water waste.

[0021] According to the technical solution of this utility model, the zero-discharge wastewater recycling system includes a living area, a production area, a wastewater collection unit, a wastewater treatment plant, and a water supply network. The production area includes a material washing unit and an unloading dust suppression unit. The wastewater collection unit includes parallel domestic wastewater collection networks and production wastewater collection networks. The domestic wastewater collection network is laid in the living area to collect domestic wastewater generated there, while the production wastewater collection network is laid in the material washing and unloading dust suppression units to collect the production wastewater generated there. Domestic wastewater and production wastewater mix to form wastewater. The wastewater treatment plant is connected to the wastewater collection unit to treat the wastewater and output clean water. The water supply network is used to deliver clean water to the material washing and unloading dust suppression units respectively. Through this system, domestic wastewater generated in the living area can be collected by the domestic wastewater collection network, and production wastewater generated in the production area can be collected by the production wastewater collection network, thus enabling both domestic and production wastewater to participate in the recycling system and improving the utilization rate of water resources in the factory. Wastewater can be purified into clean water through the wastewater treatment plant. The purified clean water can be continuously used as production water in the material washing unit and the unloading dust suppression unit, avoiding the continuous use of self-purchased clean water in the production area. This can alleviate the pressure of water shortage in water-scarce areas, reduce water costs, and ensure the stability of water use in the production area, thereby ensuring the sustainable development of production enterprises. Attached Figure Description

[0022] 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.

[0023] Figure 1 A schematic diagram of an embodiment of the zero-discharge wastewater recycling system provided by this utility model;

[0024] Figure 2 A schematic diagram of the structure of an embodiment of the wastewater treatment plant provided by this utility model;

[0025] Figure 3 A schematic diagram of the structure of an embodiment of the unloading and dust suppression unit provided by this utility model;

[0026] Figure 4 for Figure 3 A schematic diagram of one embodiment of the dust settling structure;

[0027] Figure 5A schematic diagram of the structure of an embodiment of the sewage collection unit provided by this utility model.

[0028] 1000. Zero-discharge wastewater recycling system;

[0029] 1. Living area;

[0030] 2. Production Area; 21. Material Washing Unit; 22. Unloading and Dust Suppression Unit; 221. Main Pipeline; 222. Branch Pipelines; 223. Dust Suppression Structure; 2231. Top Spray Pipeline; 2232. Top Spray Nozzle; 2233. Side Spray Pipeline; 2234. Side Spray Nozzle; 224. Secondary Pipeline; 225. Ground Dust Suppression Structure; 2251. Primary Ground Pipeline; 2252. Secondary Ground Pipeline; 226. Filter;

[0031] 3. Wastewater collection unit; 31. Domestic wastewater collection network; 32. Industrial wastewater collection network;

[0032] 4. Wastewater treatment plant; 41. Wastewater equalization tank; 42. Lift pump; 43. Primary treatment unit; 431. Aeration blower; 432. Primary sedimentation tank; 433. Multi-stage contact oxidation tank; 434. Secondary sedimentation tank; 44. Secondary treatment unit; 441. Filtration tank; 442. Disinfection tank; 45. Clear water tank;

[0033] 5. Clean water storage station;

[0034] 6. Water supply network;

[0035] 7. Green space unit.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] 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 specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] 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, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. 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.

[0040] To reduce transportation and storage costs, ore production plants are typically built in areas rich in mineral deposits. Taking industrial silicon production as an example, some industrial silicon production facilities are located in areas rich in silica resources but lacking in water resources. During the industrial silicon production process, large amounts of clean water are needed to clean the silica and reduce dust in order to meet production requirements. At the same time, the concentration of personnel within the factory, including dormitories, canteens, and office areas, also consumes significant amounts of clean water.

[0041] The applicant found that in water-scarce regions, water costs are high, and factories must strictly adhere to local environmental policies, requiring centralized wastewater treatment, transportation, and discharge at designated locations. This results in low water resource utilization and high environmental costs for the factories. Furthermore, water scarcity makes factories vulnerable to water shortages due to water allocation issues or pipeline leaks, hindering continuous production. All these factors combined are detrimental to the sustainable development of industrial silicon production plants.

[0042] Therefore, this utility model proposes a zero-discharge wastewater recycling system to solve or alleviate the above-mentioned problems.

[0043] Please see Figure 1 and Figure 5In one embodiment of this utility model, the zero-discharge wastewater recycling system 1000 includes a living area 1, a production area 2, a wastewater collection unit 3, a wastewater treatment station 4, and a water supply network 6. The production area 2 includes a material washing unit 21 and an unloading dust suppression unit 22. The wastewater collection unit 3 includes a parallel domestic wastewater collection network 31 and a production wastewater collection network 32. The domestic wastewater collection network 31 is laid in the living area 1 to collect domestic wastewater generated in the living area 1. The production wastewater collection network 32 is laid in the material washing unit 21 and the unloading dust suppression unit 22 to collect production wastewater generated in the material washing unit 21 and the unloading dust suppression unit 22. Domestic wastewater and production wastewater are mixed to form wastewater. The wastewater treatment station 4 is connected to the wastewater collection unit 3 and is used to treat wastewater and output clean water. The water supply network 6 is used to transport clean water to the material washing unit 21 and the unloading dust suppression unit 22 respectively.

[0044] Specifically, living area 1 includes dormitories, canteens, office buildings, and other areas within the factory. Wastewater generated in living area 1 flows directly into the domestic sewage collection network 31 via a pipeline laid within living area 1. Production wastewater generated in production area 2 flows directly into the production wastewater collection network 32, which is laid within the material washing unit 21 and the unloading dust suppression unit 22. In wastewater collection unit 3, the production wastewater collection network 32 and the domestic sewage collection network 31 are connected to a single main pipeline in parallel. This main pipeline connects to the wastewater treatment plant 4. Thus, when one of the domestic sewage collection network 31 or the production wastewater collection network 32 needs maintenance or replacement, the wastewater collection function of the other network does not need to be stopped, ensuring a continuous supply of clean water in production area 2. Furthermore, the parallel connection of the domestic sewage collection network 31 and the production wastewater collection network 32 allows them to share a main pipeline when transporting wastewater to the wastewater treatment plant 4, thereby reducing the investment costs of redundant construction.

[0045] Domestic sewage and industrial wastewater mix in the main pipeline to form wastewater, which is then transported to wastewater treatment plant 4 by gravity or a sewage pump. Wastewater treatment plant 4 treats and disinfects the wastewater to produce clean water. This clean water is then transported by water supply network 6 to material washing unit 21 and unloading dust suppression unit 22 for production use. The clean water quality must meet relevant discharge standards, specifically: BOD5 ≤ 10 mg / L, SS ≤ 5 mg / L, CODcr ≤ 50 mg / L, and NH3-N = 10 mg / L. Multiple pumps are installed in water supply network 6 to continuously pump clean water to material washing unit 21 and unloading dust suppression unit 22. Furthermore, flow control valves are installed between water supply network 6 and material washing unit 21, and between water supply network 6 and unloading dust suppression unit 22, to control the flow rate of clean water supplied to these two units. In this embodiment, the material washing unit 21 includes a multi-stage washing tank. Silica is washed in the tank to remove surface impurities through mechanical stirring and water rinsing. The wastewater after washing the silica flows back into the production wastewater collection network 32.

[0046] The technical solution of this embodiment collects and treats domestic sewage in living area 1 and production sewage in production area 2 in a centralized manner, so that the sewage generated in living area 1 and production area 2 can be reused. The purified clean water can be continuously used as production water for material washing unit 21 and unloading dust suppression unit 22, avoiding the continuous use of self-purchased clean water as production water in production area 2. This can alleviate the pressure of water shortage in water-scarce areas, reduce water costs, and ensure the stability of water use in production area 2, thereby ensuring the sustainable development of production enterprises.

[0047] Further, please refer to Figure 1 In one embodiment of this utility model, the wastewater zero-discharge recycling system 1000 further includes a clean water storage station 5. The clean water storage station 5 includes a storage tank with an inlet side and an outlet side. The inlet side is connected to the wastewater treatment station 4, and the outlet side is connected to the water supply network 6. The storage tank is used to store clean water. The clean water output from the wastewater treatment station 4 is first stored in the storage tank, which is then connected to the water supply network 6. This arrangement ensures a stable supply of clean water in the production area 2, avoids interruptions to the operation process in the production area 2 due to factory water outages, thereby improving the stability of production operations in the production area 2 and helping to ensure the work cycle in the production area 2.

[0048] In one embodiment of this invention, the clean water storage station 5 further includes a level sensor, which is installed on the side wall of the storage tank. The level sensor includes one of a hydrostatic level sensor, a float-type level sensor, and a capacitive level sensor. By setting up the level sensor, the water level in the storage tank can be monitored in real time, avoiding the situation where the clean water overflows due to exceeding the upper limit of the storage tank's capacity. Overflowing clean water is detrimental to the reuse of water resources. When the level sensor detects that the storage tank is about to reach its upper limit of capacity, it can slow down the flow rate of clean water supplied from the wastewater treatment station 4 to the storage tank and speed up the production cycle in the production area 2 to dynamically adjust the water level in the storage tank.

[0049] In one embodiment of this utility model, the sewage treatment plant 4 includes a booster pump 42 and a sewage equalization tank 41, a primary treatment device 43, a secondary treatment device 44, and a clear water tank 45 connected in sequence. The sewage equalization tank 41 is connected to the sewage collection unit 3 and is used to adjust the water quality of the sewage and the amount of water input to the primary treatment device 43, and to output primary treated water. The booster pump 42 is installed between the sewage equalization tank 41 and the primary treatment device 43. The primary treatment device 43 is used to receive primary treated water and generate secondary treated water. The secondary treatment device 44 is used to receive secondary treated water and generate clean water. The clear water tank 45 is used to temporarily store clean water and is connected to a storage tank.

[0050] Please refer to details. Figure 2 The wastewater equalization tank 41 includes a flow equalization tank and a quality equalization tank. The quality equalization tank is used to mix domestic sewage and industrial wastewater and control the pH value of the water, acting as a buffer for the primary treatment unit 43. The flow equalization tank is used to equalize the flow rate to continuously deliver primary treated water to the primary treatment unit 43. The booster pump 42 provides power for the flow of water in the wastewater treatment plant 4. After passing through the primary treatment unit 43 and the secondary treatment unit 44, the primary treated water is purified into clean water, which is temporarily stored in the clear water tank 45 to control the input flow rate to the storage tank. Depending on the needs, two or more primary treatment units 43 can be installed. The primary treatment unit 43 uses a biological method to treat the primary treated water and generate secondary treated water. The secondary treatment unit 44 uses a chemical method to treat the secondary treated water and generate clean water. The specific treatment units can be designed according to the water quality. Through this setup, wastewater can be treated into clean water that meets standards, allowing the clean water to be used in production.

[0051] Further, in one embodiment of this utility model, the primary treatment device 43 includes an aeration blower 431 and a primary sedimentation tank 432, a multi-stage contact oxidation tank 433, and a secondary sedimentation tank 434 connected in sequence; the secondary treatment device 44 includes a filter tank 441 and a disinfection tank 442 connected in sequence; the primary sedimentation tank 432 is connected to the wastewater equalization tank 41 to receive wastewater; the primary sedimentation tank 432 and the secondary sedimentation tank 434 are used to separate the solids and liquids in the wastewater by sedimentation; the multi-stage contact oxidation tank 433 is used to decompose the organic matter in the wastewater; the aeration blower 431 is used to supply oxygen to the multi-stage contact oxidation tank 433; the secondary sedimentation tank 434 is connected to the filter tank 441, the filter tank 441 includes a filter layer, the filter layer is used to filter the secondary treated water; the disinfection tank 442 is used to kill pathogens in the secondary treated water and produce clean water; the disinfection tank 442 is connected to the clear water tank 45.

[0052] Specifically, since the wastewater includes both domestic and industrial wastewater, a three-stage water purification process is required, consisting of a wastewater equalization tank 41, a primary treatment unit 43, and a secondary treatment unit 44. The primary sedimentation tank 432 in the primary treatment unit is used to initially separate water and solid impurities from the primary treated water. The water treated in the primary sedimentation tank 432 enters a multi-stage contact oxidation tank 433. In this embodiment, a three-stage contact oxidation tank is provided to minimize the organic matter content in the water. The contact oxidation tank is equipped with packing material containing aerobic microorganisms. Oxygen is continuously blown into the bottom of the contact oxidation tank by an aeration blower 431, ensuring the reproduction and survival of aerobic microorganisms and continuously agitating the water to ensure sufficient contact between the water and the packing material. This allows the aerobic microorganisms to continuously decompose the organic matter in the water, achieving the purpose of cleaning the water. The cleaned water then enters the secondary sedimentation tank 434 for further sedimentation, forming secondary treated water. Secondary treated water is filtered through the filter layer of filter tank 441, further separating the water and solids within it. The water separated by the filter tank then enters disinfection tank 442, where it is disinfected using at least one of chlorine disinfection, ozone disinfection, and ultraviolet disinfection, ultimately forming clean water. This setup effectively removes organic matter, pathogens, and solid particles from the wastewater, resulting in clean water.

[0053] In one embodiment of this utility model, please refer to Figure 2The primary sedimentation tank 432, the multi-stage contact oxidation tank 433, and the secondary sedimentation tank 434 are sequentially connected to form a primary treatment line. The primary treatment unit 43 includes at least two parallel primary treatment lines, and the wastewater equalization tank 41 is connected to at least two primary treatment lines. This configuration increases the wastewater treatment capacity of the wastewater treatment plant 4. Furthermore, at least two primary treatment lines can operate independently; if one line is shut down due to maintenance, cleaning, or equipment failure, the remaining lines can still maintain their wastewater treatment capacity. Additionally, it allows for flexible expansion of the wastewater treatment plant 4. During peak wastewater treatment periods, multiple primary treatment lines can operate simultaneously to increase the wastewater treatment capacity, while during off-peak periods, only one or a few primary treatment lines can be operated to save energy.

[0054] In one embodiment of this utility model, please refer to Figure 3 and Figure 4 The unloading dust suppression unit 22 includes a main pipeline 221, at least one branch pipeline 222, and at least one dust suppression structure 223. The dust suppression structure 223 includes multiple top spray pipelines 2231, multiple top spray nozzles 2232, multiple side spray pipelines 2233, and multiple side spray nozzles 2234. The multiple top spray nozzles 2232 are sequentially arranged and installed on the top spray pipelines 2231, and the multiple side spray nozzles 2234 are sequentially arranged and installed on the side spray pipelines 2233. The multiple side spray pipelines 2233 are arranged opposite to each other, and the multiple top spray pipelines 2231 and the multiple side spray pipelines 2233 enclose a gate-type structure. The branch pipeline 222 is connected to the main pipeline 221, and each branch pipeline 222 is connected to a corresponding dust suppression structure 223. The top spray pipelines 2231 and the side spray pipelines 2233 are both connected to their corresponding branch pipelines 222. Specifically, in this embodiment, the main pipeline 221 uses a DN200 pipe, the branch pipeline 222 uses a DN150 pipe, and the top spray pipeline 2231 and side spray pipeline 2233 both use DN100 pipes. This embodiment features two sets of dust removal structures, arranged side-by-side and spaced apart, capable of accommodating two trucks unloading simultaneously. During unloading, the rear of the truck is positioned within the gantry structure, allowing the gantry structure to spray water mist from the top and sides of the truck to achieve dust suppression. In this embodiment, both the top spray head 2232 and the side spray head 2234 are water mist nozzles with the following parameters: working pressure P = 0.25-0.30 MPa, flow coefficient K = 33.7, Q = 3.2-3.5 m³ / h, and spray angle 120°. Each side spray pipeline 2233 and top spray pipeline 2231 is equipped with eight water mist nozzles at intervals to achieve all-around dust suppression.

[0055] Furthermore, in one embodiment of this utility model, please continue to refer to... Figure 3The unloading dust suppression unit 22 also includes a secondary pipeline 224 and a ground dust suppression structure 225. The ground dust suppression structure 225 is used for washing the ground. The secondary pipeline 224 is connected to the main pipeline 221. The ground dust suppression structure 225 includes a primary ground pipe 2251 and multiple secondary ground pipes 2252. The primary ground pipes 2251 are connected to the secondary pipeline 224, and the secondary ground pipes 2252 are connected to the primary ground pipes 2251. The secondary ground pipes 2252 are spaced apart on the ground. In this embodiment, since the pressure required for ground cleaning is relatively low, the secondary pipeline 224, the primary ground pipes 2251, and the secondary ground pipes 2252 all use DN100 pipes. This arrangement prevents dust accumulation on the ground, avoiding interference with the unloading operation of the truck.

[0056] Furthermore, in one embodiment of this utility model, the unloading dust suppression unit 22 also includes a filter 226, which is installed in the branch pipe 222 and the secondary pipe 224. The filter 226 can filter solid impurities in the cleaning water, preventing the cleaning water from clogging the water mist nozzles and the secondary ground pipe 2252.

[0057] In one embodiment of this utility model, please refer to Figure 1 The zero-discharge wastewater recycling system 1000 also includes a greening unit 7 connected to the water supply network 6. The greening unit is used to store water for greening within the factory. The greening unit 7 is connected in parallel with the production area 2, enabling the effective use of clean water even when the production area 2 does not require a large water supply, avoiding water quality deterioration due to long-term water storage, and thus further reducing water waste.

[0058] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A zero-discharge wastewater recycling system, characterized in that, include: Residential area; The production area includes a material washing unit and an unloading and dust suppression unit; The wastewater collection unit includes a parallel domestic wastewater collection network and a production wastewater collection network. The domestic wastewater collection network is laid in the living area to collect domestic wastewater generated in the living area. The wastewater collection pipeline is laid in the material washing unit and the unloading dust suppression unit to collect the wastewater generated by the material washing unit and the unloading dust suppression unit. The domestic sewage and the industrial sewage are mixed to form sewage; A wastewater treatment plant, connected to the wastewater collection unit, is used to treat the wastewater and output clean water. A water supply network is used to deliver the clean water to the material washing unit and the unloading dust suppression unit, respectively.

2. The zero-discharge wastewater recycling system as described in claim 1, characterized in that, The zero-discharge wastewater recycling system also includes a clean water storage station, which includes a storage tank with an inlet side and an outlet side. The inlet side is connected to the wastewater treatment station, and the outlet side is connected to the water supply network. The storage tank is used to store the clean water.

3. The wastewater zero-discharge recycling system as described in claim 2, characterized in that, The clean water storage station also includes a liquid level sensor, which is installed on the side wall of the storage tank.

4. The wastewater zero-discharge recycling system as described in claim 2, characterized in that, The wastewater treatment plant includes a booster pump and a wastewater equalization tank, a primary treatment unit, a secondary treatment unit, and a clear water tank connected in sequence. The wastewater equalization tank is connected to the wastewater collection unit and is used to adjust the water quality of the wastewater and the amount of water input to the primary treatment device, and to output primary treated water. The booster pump is installed between the wastewater equalization tank and the primary treatment device; The primary treatment device is used to receive the primary treated water and generate secondary treated water; The secondary treatment device is used to receive the secondary treated water and generate the clean water; The clear water tank is used to temporarily store the clean water, and the clear water tank is connected to the liquid storage tank.

5. The zero-discharge wastewater recycling system as described in claim 4, characterized in that, The primary treatment device includes an aeration blower and a primary sedimentation tank, a multi-stage contact oxidation tank, and a secondary sedimentation tank connected in sequence; the secondary treatment device includes a filtration tank and a disinfection tank connected in sequence. The primary sedimentation tank is connected to the wastewater equalization tank to receive the wastewater. The primary sedimentation tank and the secondary sedimentation tank are used to separate the solids and liquids in the wastewater by sedimentation. The multi-stage contact oxidation tank is used to decompose the organic matter in the wastewater. The aeration blower is used to supply oxygen to the multi-stage contact oxidation tank. The secondary sedimentation tank is connected to the filtration tank, and the filtration tank includes a filter layer for filtering the secondary treated water. The disinfection tank is used to kill pathogens in the secondary treated water and produce the clean water. The disinfection tank is connected to the clear water tank.

6. The wastewater zero-discharge recycling system as described in claim 5, characterized in that, The primary sedimentation tank, the multi-stage contact oxidation tank, and the secondary sedimentation tank are connected in sequence to form a primary treatment line. The primary treatment device includes at least two primary treatment lines connected in parallel, and the wastewater equalization tank is connected to at least two of the primary treatment lines.

7. The zero-discharge wastewater recycling system as described in claim 1, characterized in that, The unloading dust suppression unit includes a main pipeline, at least one branch pipeline, and at least one dust suppression structure. The dust suppression structure includes multiple top spray pipelines, multiple top spray heads, multiple side spray pipelines, and multiple side spray heads. The multiple top spray heads are arranged sequentially on the top spray pipelines, and the multiple side spray heads are arranged sequentially on the side spray pipelines. The multiple side spray pipelines are arranged opposite to each other, and the multiple top spray pipelines and the multiple side spray pipelines enclose each other to form a gate structure. The branch pipes are connected to the main pipe, and each branch pipe is connected to a set of dust suppression structures. The top spray pipe and the side spray pipe are both connected to their corresponding branch pipes.

8. The zero-discharge wastewater recycling system as described in claim 7, characterized in that, The unloading dust suppression unit also includes a secondary pipeline and a ground dust suppression structure. The ground dust suppression structure is used to wash the ground. The secondary pipeline is connected to the main pipeline. The ground dust suppression structure includes a primary ground pipe and multiple secondary ground pipes. The primary ground pipe is connected to the secondary pipeline, and the secondary ground pipes are connected to the primary ground pipe. The secondary ground pipes are spaced apart on the ground.

9. The zero-discharge wastewater recycling system as described in claim 8, characterized in that, The unloading dust suppression unit also includes a filter, which is installed in the branch pipeline and the secondary pipeline.

10. The zero-discharge wastewater recycling system as described in claim 1, characterized in that, The zero-discharge wastewater recycling system also includes a greening unit connected to the water supply network.

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