Comprehensive station wastewater multi-stage filtration treatment device

Abstract

The embodiment of the utility model provides a multi-stage filtration treatment device for wastewater of a comprehensive station, and relates to the technical field of wastewater treatment. The comprehensive station wastewater multi-stage filtration treatment device comprises a three-stage sedimentation tank and a water storage tank. Wherein the three-stage sedimentation tank comprises three sedimentation tanks which are sequentially connected, and the sedimentation tank at the last stage is connected with the water storage tank. The bottom surface of each sedimentation tank is downwards concavely provided with a sediment tank, each sedimentation tank is provided with two water distribution ports, the two water distribution ports are respectively used as a water inlet and a water outlet of the sedimentation tank, and each sediment tank is arranged close to one end, which is used as the water distribution port of the water inlet, of the corresponding sedimentation tank. A filter fence is vertically arranged in each sedimentation tank, and the filter fence in each sedimentation tank is arranged on one side, far away from the water distribution port serving as the water inlet, of the sediment tank. The comprehensive station wastewater multi-stage filtration treatment device can improve the filtration effect and is convenient for cleaning sediments.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater filtration, and particularly to a multi-stage filtration treatment device for wastewater in a comprehensive station yard. Background Art

[0002] With the acceleration and continuous increase of the highway construction process, the wastewater treatment facilities at the construction site have become an important part of the infrastructure of the construction unit. However, in many rural areas, remote areas and water-scarce areas, due to the limitations of geographical environment, economic conditions, water resources and other factors, it is difficult to promote and use traditional large-scale wastewater treatment facilities. Therefore, the application of small-scale integrated wastewater treatment equipment is becoming more and more extensive, and it has become an important means for wastewater treatment in mountainous areas, remote areas and areas with difficult conditions.

[0003] Prefabricated comprehensive station yards are mass-produced in a standardized manner, and the bridge construction period is accelerated. The project promotes the use of mobile APP to access the fully automatic spraying maintenance system. The automatic spraying adopts an environmental protection concept from water supply to water use. The curing water is basically sprayed on the beam slab after being atomized by high pressure, resulting in less accumulated water, making full use of water resources, thus saving water and achieving the purpose of protecting the construction environment. The surplus materials generated during the production process, the surplus materials for cleaning machines and vehicles, and the scrapped concrete generated due to various abnormal situations are all separated by a sand and stone separator. The sand and stone are recycled, and the waste slurry separated and the wastewater generated by cleaning the mixing truck are sent to the production line for production use after being stirred. This not only makes full use of its effective components, but also realizes zero discharge of sewage. Through the resource recycling system, water is saved every year, the generation of solid waste is reduced, sewage discharge fees, garbage treatment fees, etc. are saved, and economic and social benefits are effectively realized.

[0004] The three-stage sedimentation tank is a technical method for treating water pollutants. However, the current three-stage sedimentation tank has technical problems of poor filtration effect and inconvenient cleaning of sediment. Summary of the Utility Model

[0005] The purpose of the utility model includes providing a multi-stage filtration treatment device for wastewater in a comprehensive station yard, which can improve the filtration effect and facilitate the cleaning of sediment.

[0006] The embodiments of the utility model can be implemented as follows:

[0007] In a first aspect, an embodiment of the utility model provides a multi-stage filtration treatment device for wastewater in a comprehensive station yard, including a three-stage sedimentation tank and a reservoir;

[0008] The three-stage sedimentation tank includes three sedimentation tanks connected in sequence, and the last sedimentation tank is connected to the reservoir;

[0009] The bottom surface of each sedimentation tank is recessed downward to form a sediment sump. Each sedimentation tank is provided with two water distribution ports, and the two water distribution ports respectively serve as the water inlet and the water outlet of the sedimentation tank. Each sediment sump is arranged at one end close to the water distribution port serving as the water inlet of the sedimentation tank where it is located.

[0010] A filter fence is vertically arranged in each sedimentation tank, and the filter fence in each sedimentation tank is arranged on the side of the sediment sump away from the water distribution port serving as the water inlet.

[0011] The multi-stage filtration treatment device for wastewater in an integrated station provided by the embodiment of the present utility model can perform primary filtration treatment and primary sedimentation in each sedimentation tank by arranging a vertical filter fence in each sedimentation tank. In this way, the three-stage sedimentation tank can perform three times of filtration treatment, improving the filtration effect. By arranging a sediment sump at one end of each sedimentation tank close to its water inlet and arranging the filter fence close to the sediment sump, it is convenient for the sediment filtered and settled to sink into the sediment sump, facilitating manual cleaning of the sediment. In addition, compared with the situation where the sediment sump is entirely arranged on the bottom surface of the sedimentation tank, the sediment sump in the embodiment of the present utility model occupies a smaller area and is more convenient for manual cleaning.

[0012] Further, in an optional implementation manner, the filter fence is an aquatic reed filter fence.

[0013] Further, in an optional implementation manner, each filter fence is arranged at 1 / 3 of the length of the corresponding sedimentation tank.

[0014] Further, in an optional implementation manner, the bottom surface of each sedimentation tank has a reverse slope structure with one end close to the sediment sump being lower and the end far from the sediment sump being higher.

[0015] Further, in an optional implementation manner, the slope of the reverse slope structure of the bottom surface of the sedimentation tank is 2% ± 1%.

[0016] Further, in an optional implementation manner, each sedimentation tank is rectangular, and the two water distribution ports on each sedimentation tank are diagonally distributed.

[0017] Further, in an optional implementation manner, it further includes a primary filtration tank and a secondary filtration tank;

[0018] In the three-stage sedimentation tank, the last sedimentation tank is connected to the primary filtration tank through a pipeline, the primary filtration tank is connected to the secondary filtration tank through a pipeline, and the secondary filtration tank is connected to the reservoir through a pipeline.

[0019] Further, in an alternative embodiment, the first - stage filtration tank is filled with fine quartz sand having a particle size of 0.1 - 0.3 mm, and the filling rate is 60% - 80%. At the lower end of the fine quartz sand in the first - stage filtration tank, 1 - 3 cm of gravel is filled.

[0020] Further, in an alternative embodiment, the second - stage filtration tank is filled with PP cotton filters.

[0021] Further, in an alternative embodiment, a lift pump is provided at each sedimentation tank near the water distribution port serving as the water outlet of each sedimentation tank. A liquid - level controller is provided in each sedimentation tank, and the liquid - level controller is electrically connected to the lift pump for detecting the liquid level in the sedimentation tank and controlling the start or stop of the lift pump according to the liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a top - view plane structure schematic diagram of the comprehensive station - yard wastewater multi - stage filtration treatment device provided by the embodiment of the present invention;

[0024] Figure 2 It is a front - view structure schematic diagram of the comprehensive station - yard wastewater multi - stage filtration treatment device provided by the embodiment of the present invention;

[0025] Figure 3 It is a process flow schematic diagram of the comprehensive station - yard wastewater multi - stage filtration treatment process applied to the comprehensive station - yard wastewater multi - stage filtration treatment device provided by the embodiment of the present invention.

[0026] ICON:

[0027] 10 - Comprehensive station - yard wastewater multi - stage filtration treatment device;

[0028] 100 - Third - stage sedimentation tank; 110 - Sedimentation tank; 111 - Bottom surface; 112 - Sludge pit; 113 - Water distribution port; 120 - Filter fence; 130 - Lift pump; 140 - Liquid - level controller;

[0029] 200 - Reservoir;

[0030] 300 - First - stage filtration tank; 310 - Fine quartz sand; 320 - Gravel;

[0031] 400 - Second - stage filtration tank; 410 - PP cotton filter. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the scope of protection of the present utility model.

[0034] 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.

[0035] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the products of the present utility model are usually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0036] In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0037] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.

[0038] Please refer to Figure 1 and Figure 2, an embodiment of the present utility model provides a multi-stage filtration treatment device 10 for wastewater in a comprehensive station, which can be used as a small wastewater treatment device and applied to the comprehensive station of a precast beam yard for treating the wastewater in the comprehensive station. The multi-stage filtration treatment device 10 for wastewater in the comprehensive station includes a three-stage sedimentation tank 100 and a reservoir 200. Among them, the three-stage sedimentation tank 100 includes three sedimentation tanks 110 connected in sequence, and the last sedimentation tank 110 is connected to the reservoir 200. The bottom surface 111 of each sedimentation tank 110 is recessed downward to form a sediment sump 112. Each sedimentation tank 110 is provided with two water distribution ports 113, and the two water distribution ports 113 serve as the water inlet and outlet of the sedimentation tank 110 respectively. Each sediment sump 112 is arranged at one end of the water distribution port 113 serving as the water inlet of the sedimentation tank 110 where it is located. A filtering fence 120 is vertically arranged in each sedimentation tank 110, and the filtering fence 120 in each sedimentation tank 110 is arranged on the side of the sediment sump 112 away from the water distribution port 113 serving as the water inlet.

[0039] In the multi-stage filtration treatment device 10 for wastewater in the comprehensive station provided by the embodiment of the present utility model, by arranging a vertical filtering fence 120 in each sedimentation tank 110, primary filtration treatment and one-time sedimentation can be carried out in each sedimentation tank 110. In this way, the three-stage sedimentation tank 100 can carry out three times of filtration treatment, improving the filtration effect. By arranging a sediment sump 112 at one end of each sedimentation tank 110 close to its water inlet, and arranging the filtering fence 120 close to the sediment sump 112, it is convenient for the sediment filtered and settled to sink into the sediment sump 112, so as to facilitate manual cleaning of the sediment. In addition, compared with the situation where the sediment sump 112 is entirely arranged on the bottom surface 111 of the sedimentation tank 110, the sediment sump 112 in the embodiment of the present utility model occupies a smaller area and is more convenient for manual cleaning.

[0040] It should be noted that the three sedimentation tanks 110 included in the tertiary sedimentation tank 100 are the first-stage sedimentation tank 110, the second-stage sedimentation tank 110, and the third-stage sedimentation tank 100 respectively. The first-stage sedimentation tank 110, the second-stage sedimentation tank 110, and the third-stage sedimentation tank 100 are connected in sequence, where the third-stage sedimentation tank 100 is the last-stage sedimentation tank 110. Each sedimentation tank 110 has two water distribution ports 113. One water distribution port 113 can be regarded as the water inlet of the sedimentation tank 110, and the other water distribution port 113 can be regarded as the water outlet of the sedimentation tank 110. In order to increase the process, the two water distribution ports 113 are respectively arranged at opposite ends of the sedimentation tank 110. As an example, the water distribution port 113 at the left end of the first-stage sedimentation tank 110 is the water inlet of the first-stage sedimentation tank 110, and the water distribution port 113 at the right end is the water outlet of the first-stage sedimentation tank 110 and also the water inlet of the second-stage sedimentation tank 110. That is to say, the water inlet of the first-stage sedimentation tank 110 and the water outlet of the second-stage sedimentation tank 110 share one water distribution port 113; similarly, the water distribution port 113 at the left end of the second-stage sedimentation tank 110 is the water inlet of the second-stage sedimentation tank 110, and the water distribution port 113 at the right end is the water outlet of the second-stage sedimentation tank 110 and also the water inlet of the third-stage sedimentation tank 100. That is to say, the water inlet of the second-stage sedimentation tank 110 and the water outlet of the second-stage sedimentation tank 110 share one water distribution port 113, and the water distribution port 113 at the right end of the third-stage sedimentation tank 100 is the water outlet of the third-stage sedimentation tank 100.

[0041] In addition, it should be noted that the filtering fence 120 can perform rough filtration on the wastewater, and its specific structure is not specifically limited. For example, a sand and gravel filtering fence can be used.

[0042] In order to improve the filtering effect and facilitate recycling, in this embodiment, the filtering fence 120 is an aquatic reed filtering fence 120. It should be understood that the aquatic reed filtering fence 120 is a filtering fence filled with aquatic reeds. The aquatic reed filtering fence 120 can be selected to be 2-5 cm thick to ensure the filtering effect. In this embodiment, the thickness of the aquatic reed filtering fence 120 is 3 cm.

[0043] Aquatic reeds have a relatively large number of stomata and can adsorb harmful small particulate matter, with an obvious on-site effect. In the embodiment of the present utility model, the tertiary sedimentation tank 100 adopts a sedimentation tank 110 that integrates various sedimentation effects such as gravity, collision adsorption force, and contact adsorption force, improving the particle sedimentation efficiency. In the embodiment of the present utility model, the sedimentation tank 110 can also be considered as an interception sedimentation tank 110. The interception sedimentation tank 110 refers to a sedimentation tank equipped with interceptors inside, which set obstacles for the freely moving particles in the water. When the particles move, they collide with the interceptors in three-dimensional space, so that the moving particles achieve collision and stillness with the fixed interceptors in three-dimensional space, that is, the particle movement speed is zero. In this embodiment, the aquatic reed filter fence 120 is used as the interceptor, improving the collision adsorption force and further improving the particle sedimentation efficiency.

[0044] As an example, the reeds can be selected as original aquatic reeds (annual), with a diameter of 0.8 - 1.2 cm, no discoloration, no mildew, and a certain elasticity.

[0045] In addition, in this embodiment, each filter fence 120 is arranged at the 1 / 3 position of the length of the corresponding sedimentation tank 110. In this way, it can not only ensure that the sludge filtered by the filter fence 120 sinks into the sediment sump 112, but also enable the wastewater filtered by the filter fence 120 to have a sufficient flow path, enhancing the sedimentation effect.

[0046] It should be understood that the filter fence 120 is arranged at the 1 / 3 position of the length of the corresponding sedimentation tank 110 to ensure that the sediment sump 112 is located between the water inlet and the filter fence 120, ensuring that the sludge filtered by the filter fence 120 sinks into the sediment sump 112. In this embodiment, the filter fence 120 is generally located at the edge of the sediment sump 112 far from the water inlet side, so as to facilitate the sludge filtered by the filter fence 120 to sink into the sediment sump 112.

[0047] Optionally, in this embodiment, the sediment sump 112 is a groove structure that is 50 cm wide and lower than the bottom surface 111 of the sedimentation tank 110, and is located below the water inlet of each sedimentation tank 110, facilitating manual cleaning. When manually cleaning, a square iron shovel can be used for cleaning.

[0048] Optionally, in this embodiment, the bottom surface 111 of each sedimentation tank 110 has a reverse slope structure with one end closer to the sediment sump 112 being lower and the end farther from the sediment sump 112 being higher. That is to say, starting from the sediment sump 112 towards the downstream of the sedimentation tank 110, the bottom surface 111 of the sedimentation tank 110 is an inclined reverse slope structure, with one end closer to the sediment sump 112 being lower and the end farther from the sediment sump 112 being higher. In this way, the sediment deposited on the bottom surface 111 of the sedimentation tank 110 can flow back into the sediment sump 112 along the bottom surface 111 of the sedimentation tank 110 under the action of gravity, facilitating the sediment sump 112 to receive the sediment in the sedimentation tank 110 for subsequent manual cleaning of the sediment sump 112.

[0049] It should be noted that the wastewater after passing through the filtering fence 120 continues to flow towards the end of the water outlet, and sedimentation of the sediment occurs during the flow. Therefore, the sediment after the filtering fence 120 can also flow back into the sediment sump 112 along the bottom surface 111 of the sedimentation tank 110 under the action of gravity, improving the collection effect of the sediment.

[0050] Optionally, the slope of the reverse slope structure of the bottom surface 111 of the sedimentation tank 110 is 2% ± 1%. In this way, the backflow effect of the sediment on the bottom surface 111 of the sedimentation tank 110 is ensured. In this embodiment, the slope of the reverse slope structure of the bottom surface 111 of the sedimentation tank 110 is 2%. Additionally, the bottom plate of each sedimentation tank 110 can be cast with C25 concrete of 25 cm.

[0051] Optionally, in this embodiment, each sedimentation tank 110 is rectangular, and the two water distribution ports 113 on each sedimentation tank 110 are both diagonally distributed. That is to say, for each sedimentation tank 110, its water inlet and water outlet are diagonally distributed. In this way, it plays a role in stabilizing the flow and sedimentation, increasing the flow path, and enhancing the sedimentation effect. Additionally, optionally, the sedimentation tank 110 can consider a brick-concrete structure or a brick structure on-site, for example, waterproof mortar can be plastered on the inner wall.

[0052] Optionally, in this embodiment, a lift pump 130 is provided at each sedimentation tank 110 near the water distribution port 113 serving as its water outlet, and a liquid level controller 140 is provided inside each sedimentation tank 110. The liquid level controller 140 is electrically connected to the lift pump 130 and is used to detect the liquid level in the sedimentation tank 110 and control the start or stop of the lift pump 130 according to the liquid level.

[0053] By setting up the lift pump 130 and the liquid level controller 140, it is possible to effectively monitor the liquid level of the wastewater in the sedimentation tank 110, and control the lift pump 130 to lift the wastewater according to the liquid level of the wastewater, so as to discharge the wastewater from the outlet of the sedimentation tank 110. Optionally, the lift height of the lift pump 130 is 1.5 - 2.0 m, and the liquid level controller 140 controls the lift pump 130 to start when the liquid level is higher than or equal to 0.5 m and stop working when it is lower than 0.5 m.

[0054] In this embodiment, in order to improve the filtration effect, the multi-stage filtration treatment device 10 for wastewater in the comprehensive station also includes a primary filtration tank 300 and a secondary filtration tank 400. Among them, in the three-stage sedimentation tank 100, the last sedimentation tank 110 is connected to the primary filtration tank 300 through a pipeline, that is to say, the third-stage sedimentation tank 100 is connected to the primary filtration tank 300 through a pipeline. The primary filtration tank 300 is connected to the secondary filtration tank 400 through a pipeline, and the secondary filtration tank 400 is connected to the reservoir 200 through a pipeline.

[0055] In this way, the wastewater that has been roughly filtered multiple times by the three-stage sedimentation tank 100 is introduced into the primary filtration tank 300 for fine filtration, and then into the secondary filtration tank 400 for microfiltration, improving the filtration effect on the wastewater. In addition, the three treatment process steps of rough filtration, fine filtration, and microfiltration are respectively placed in independent devices for operation. Especially, the rough filtration is carried out in advance in the sedimentation tank 110, reducing the cost, improving the treatment effect, being convenient for maintenance, and having high operation efficiency.

[0056] Optionally, in this embodiment, the primary filtration tank 300 is filled with fine quartz sand 310 with a particle size of 0.1 - 0.3 mm, and the filling rate is 60% - 80%. The primary filtration tank 300 is filled with 1 - 3 cm of gravel 320 at the lower end of the fine quartz sand 310. When carrying out fine filtration, the wastewater passes through the fine quartz sand 310 and the gravel 320 in sequence, improving the fine filtration effect. In addition, the primary filtration tank 300 can be made of stainless steel material, which is non-toxic and harmless, and at the same time avoids the corrosion of the wastewater to the equipment.

[0057] Optionally, in this embodiment, the secondary filtration tank 400 is filled with a PP cotton filter element 410. The wastewater after fine filtration is introduced into the secondary filtration tank 400 for microfiltration, and the microfiltration effect is improved through the filtration of the PP cotton filter element 410.

[0058] Optionally, the secondary filtration tank 400 is a precision filtration device, adopting a plastic structure. A 20-inch 3-core PP cotton filter element 410 is placed in the secondary filtration tank 400, and it can be taken out and cleaned once every 15 - 30 days to clean the tiny sediment attached to the surface of the filter element. The PP cotton filter element 410 can be replaced every six months to one year.

[0059] In addition, in an optional embodiment, the multi-stage filtration treatment device 10 for wastewater from comprehensive stations further includes a chemical agent pipeline (not shown in the figure), which is used to introduce chemical agents into the third-stage sedimentation tank to adjust the water in the third-stage sedimentation tank to neutral. The added chemical agents are selected according to actual needs. For example, according to the pH value measured on-site in the third-stage sedimentation tank, the required chemical agents can be correspondingly selected. As an example, the chemical agents can be sodium silicate hydrate, etc.

[0060] Please refer to Figure 3 , in addition, the multi-stage filtration treatment process for wastewater from comprehensive stations applied by the multi-stage filtration treatment device 10 for wastewater from comprehensive stations provided in the embodiment of the present invention includes the following steps:

[0061] Step S100: Introduce the wastewater into three sedimentation tanks 110 in the three-stage sedimentation tank 100 in sequence, so that the wastewater is roughly filtered through the vertically arranged filter fences 120 in the three sedimentation tanks 110, and the sediment filtered out in each sedimentation tank 110 sinks into the sedimentation tank 112 recessed downward on the bottom surface 111 of the sedimentation tank 110. Optionally, the hydraulic retention time of the three-stage sedimentation tank 100 is more than 5 hours to improve the filtration and sedimentation effects.

[0062] In step S100, the wastewater can be subjected to primary filtration treatment and one-time sedimentation in each sedimentation tank 110. In this way, the three-stage sedimentation tank 100 can perform three filtration treatments, improving the filtration effect. By arranging a sedimentation tank 112 at one end of each sedimentation tank 110 close to its respective water inlet, and arranging the filter fence 120 close to the sedimentation tank 112, it is convenient for the sediment filtered out to sink into the sedimentation tank 112, so as to facilitate manual cleaning of the sediment.

[0063] Step S200: Introduce the wastewater filtered by the three-stage sedimentation tank 100 into the primary filtration tank 300 for fine filtration. Among them, the primary filtration tank 300 is filled with fine quartz sand 310 with a particle size of 0.1 - 0.3 mm, and the filling rate is 60% - 80%. The primary filtration tank 300 is filled with gravel 320 with a thickness of 1 - 3 cm at the lower end of the fine quartz sand 310.

[0064] In step S200, the wastewater after rough filtration is introduced into the primary filtration tank 300 for fine filtration. When the wastewater is finely filtered, it passes through the fine quartz sand 310 and the gravel 320 in sequence, improving the fine filtration effect.

[0065] Step S300: Introduce the wastewater filtered by the primary filtration tank 300 into the secondary filtration tank 400 for microfiltration. Among them, the secondary filtration tank 400 is filled with a PP cotton filter element 410.

[0066] In step S300, the wastewater after fine filtration is introduced into the secondary filtration tank 400 for microfiltration. Through the filtration of the PP cotton filter element 410, the effect of microfiltration is improved.

[0067] This multi-stage filtration treatment process for wastewater in the comprehensive station runs the three treatment process steps of coarse filtration, fine filtration, and microfiltration in separate devices. In particular, coarse filtration is carried out in advance in the sedimentation tank 110, which reduces costs, improves the treatment effect, is convenient for maintenance, and has high operating efficiency.

[0068] In addition, in the optional steps of this multi-stage filtration treatment process for wastewater in the comprehensive station, it may also include the disposal of generated waste. As an example, in this multi-stage filtration treatment process for wastewater in the comprehensive station, waste generation mainly consists of two parts: the muddy water on the site in the sedimentation tank 112 and the fine particulate sediment in the primary filtration tank 300. The sand and soil in the sedimentation tank 112 can be manually cleaned regularly and transported to a designated waste dump site uniformly. The fine particulate sediment in the primary filtration tank 300 is used as ordinary quartz sand for sewage treatment and can generally be used for 3 to 5 years. The quartz sand waste can be directly sent to a construction site for landfill. The replacement cycle of the PP cotton filter element 410 is about 1 year. After the waste PP cotton filter is collected regularly, it can be handed over to an environmental protection company specializing in recycling the PP cotton filter element 410 for treatment. Aquatic reeds can be treated or buried on-site for recycling.

[0069] In addition, in the optional steps of this multi-stage filtration treatment process for wastewater in the comprehensive station, it may also include disinfecting the water in the reservoir 200. For example, disinfectant is added to the reservoir 200 to disinfect the microorganisms in the water in the reservoir 200.

[0070] In summary, the multi-stage filtration treatment device for wastewater in the comprehensive station provided by the embodiment of the present utility model has at least the following advantages:

[0071] (1) Using the three-stage sedimentation tank 100 (physical and chemical pretreatment) and the primary filtration tank 300 and secondary filtration tank 400 processes to treat the maintenance and construction water significantly improves the effluent water quality. It can achieve the effects of protecting the environment, saving water resources, and reducing costs.

[0072] (2) Running the three treatment process steps of coarse filtration, fine filtration, and microfiltration in separate devices. In particular, coarse filtration is carried out in advance in the sedimentation tank 110, which reduces costs, improves the treatment effect, is convenient for maintenance, and has high operating efficiency. Each treatment process is reasonably arranged, with a compact structure, small floor area, few auxiliary facilities, and convenient and simple equipment implementation, and is suitable for wastewater treatment in centralized prefabricated comprehensive stations.

[0073] (3) The amount of waste generated by the recycling process is small, and the economic, environmental and social benefits generated by the implementation of the recycling project are relatively obvious. It can fundamentally guarantee the production and living environment of residents, improve living conditions, promote the health of surrounding villagers, further improve the urban environment, and achieve the goal of low-carbon environmental protection.

[0074] (4) In arid and rainy areas, water supply is tight. Through the multi-stage filtration and treatment process of wastewater from integrated sites, necessary water-saving measures are taken to achieve wastewater recycling, energy conservation and emission reduction, and improve the utilization of water resources.

[0075] (5) The three-stage sedimentation tank 100 can be considered to adopt a horizontal flow sedimentation tank 110, which has the advantages of simple structure, convenient management, and strong resistance to impact loads. The horizontal flow sedimentation tank 110 is rectangular, with a sedimentation area at the top and a sludge area at the bottom. There is an inlet area at the front of the tank and an outlet area at the back of the tank. After the coagulated raw water flows into the sedimentation tank 110, it is evenly distributed along the entire cross-section of the inlet area, enters the sedimentation area, and then slowly flows to the outlet area. The particles in the water sink to the bottom of the tank, and the deposited sludge is regularly discharged from the tank.

[0076] (6) The water outlets 113 of the tertiary sedimentation tank 100 are diagonally distributed, which plays a role in stabilizing flow and sedimentation, increasing the flow rate, and enhancing the sedimentation effect.

[0077] (7) Using aquatic reeds for grid filtration can be done locally, is environmentally friendly, and can be easily recycled. The service life of aquatic reeds is within 5 years, which meets the construction period requirements.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A multi-stage filtration treatment device for integrated station wastewater, characterized in that, It includes a three-stage sedimentation tank (100) and a reservoir (200); The three-stage sedimentation tank (100) includes three sedimentation tanks (110) connected in sequence, and the last sedimentation tank (110) is connected to the reservoir (200); The bottom surface (111) of each sedimentation tank (110) is recessed downward to form a sediment sump (112). Each sedimentation tank (110) is provided with two water distribution openings (113). The two water distribution openings (113) serve as the inlet and outlet of the sedimentation tank (110) respectively. Each sediment sump (112) is arranged at one end close to the water distribution opening (113) serving as the inlet of the sedimentation tank (110) where it is located; A filtering fence (120) is vertically arranged in each sedimentation tank (110), and the filtering fence (120) in each sedimentation tank (110) is arranged on the side of the sediment sump (112) away from the water distribution opening (113) serving as the inlet.

2. The multi-stage filtration treatment device for wastewater in a comprehensive station according to claim 1, wherein The filtering fence (120) is an aquatic reed filtering fence (120).

3. The multi-stage filtration treatment device for the wastewater of the comprehensive station yard according to claim 1, wherein, Each filtering fence (120) is arranged at 1 / 3 of the length of the corresponding sedimentation tank (110).

4. The multi-stage filtration treatment device for integrated station wastewater according to claim 1, wherein, The bottom surface (111) of each sedimentation tank (110) has a reverse slope structure with one end close to the sediment sump (112) being lower and the end away from the sediment sump (112) being higher.

5. The multi-stage filtration treatment device for integrated station wastewater according to claim 4, characterized in that The slope of the reverse slope structure of the bottom surface (111) of the sedimentation tank (110) is 2% ± 1%.

6. The multi-stage filtration treatment device for wastewater in an integrated station according to claim 1, characterized in that, Each sedimentation tank (110) is rectangular, and the two water distribution openings (113) on each sedimentation tank (110) are diagonally distributed.

7. The multi-stage filtration treatment device for integrated station wastewater according to claim 1, characterized in that It also includes a primary filtration tank (300) and a secondary filtration tank (400); In the three-stage sedimentation tank (100), the last sedimentation tank (110) is connected to the primary filtration tank (300) through a pipeline. The primary filtration tank (300) is connected to the secondary filtration tank (400) through a pipeline, and the secondary filtration tank (400) is connected to the reservoir (200) through a pipeline.

8. The multi-stage filtration treatment device for the wastewater of the comprehensive station yard according to claim 7, characterized in that, The primary filtration tank (300) is filled with fine quartz sand (310) with a particle size of 0.1 - 0.3 mm, and the filling rate is 60% - 80%. The primary filtration tank (300) is filled with gravel (320) with a thickness of 1 - 3 cm at the lower end of the fine quartz sand (310).

9. The multi-stage filtration treatment device for the wastewater of the comprehensive station yard according to claim 7, wherein, The secondary filtration tank (400) is filled with PP cotton filter elements (410).

10. The multi-stage filtration treatment device for the wastewater of the integrated station yard according to claim 1, wherein, A lift pump (130) is arranged at each sedimentation tank (110) near the water distribution opening (113) serving as the outlet. A liquid level controller (140) is arranged in each sedimentation tank (110). The liquid level controller (140) is electrically connected to the lift pump (130) and is used to detect the liquid level in the sedimentation tank (110) and control the start or stop of the lift pump (130) according to the liquid level.

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