Construction site sewage treatment water recycling system

Abstract

The utility model discloses a construction site sewage treatment water recycling system which comprises a sewage collection tank, a flocculation reaction tank, a sedimentation tank, a filter tank and a clean water tank which are sequentially communicated along the sewage advancing direction, and further comprises a dosing assembly and a sludge treatment assembly, the dosing assembly is used for adding a certain amount of a flocculating agent into the flocculation reaction tank, mixing and stirring the sewage and the flocculating agent by utilizing the flocculation reaction tank, and introducing the sewage and the flocculating agent into the sedimentation tank for sedimentation; a filter layer is arranged in the filter tank and is used for filtering the precipitated supernatant, and finally, recyclable clear water is obtained; through the synergistic effect of the dosing assembly, the flocculation reaction tank and the sedimentation tank, rapid flocculation and sedimentation of sewage are realized, so that the sedimentation effect of the sewage is better, the sewage treatment efficiency is improved, the working time is shortened, recyclable clear water is obtained, the economic benefit is improved, and the purposes of water saving and environmental protection are achieved.

Description

Technical Field

[0001] The utility model relates to the field of construction site sewage treatment, in particular to a sewage treatment water circulation utilization system for construction sites. Background Technique

[0002] During the construction process of construction projects, the slurry water generated, the flushing water of vehicles and construction machinery, the site flushing water, the sewage generated by rainwater falling on the construction site, etc. all contain a large amount of sediment. If it enters the surrounding drainage pipe network without being collected and effectively sedimented, it is easy to cause siltation and blockage of the pipe network, resulting in poor drainage. And if the construction wastewater is directly discharged without effective treatment, it will cause damage to the surrounding ecological environment. At present, most of the construction site sewage treatment facilities are limited to the traditional three-stage sedimentation process: the muddy sewage passes through the preset water passing ports between the pipes and the sedimentation tanks and passes through the first-stage, second-stage, and third-stage sedimentation tanks in sequence, and finally is discharged into the nearby municipal pipe network through the outlet pipe. However, the sediment content of the traditional three-stage sedimentation effluent is still relatively high, and the effluent after three-stage sedimentation still cannot meet the discharge standard.

[0003] In 2013, the Department of Housing and Urban-Rural Development of Guangdong Province issued the Guangdong Provincial Standard "Evaluation Standard for Green Construction of Construction Projects" (DBJ15-97-2013), which made clear requirements for green construction. The Guangzhou government further refined the evaluation content of green construction in combination with its own conditions, issued the implementation plan and policies for green construction, and promoted the green construction work of "four conservation and one environmental protection". In construction, water conservation and water resource recycling are the core of "four conservation and one environmental protection". Therefore, the traditional three-stage sedimentation process used on construction sites can no longer meet the requirements of green construction of "four conservation and one environmental protection". Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a sewage treatment water circulation utilization system for construction sites to solve the above problems.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a sewage treatment water circulation utilization system for construction sites, which includes a sewage collection tank, a flocculation reaction tank, a sedimentation tank, a filtration tank and a clear water tank connected in sequence along the advancing direction of the sewage, and also includes a dosing component connected to the flocculation reaction tank and a sludge treatment component connected to the bottom of the sedimentation tank; the dosing component adds a certain amount of flocculant into the flocculation reaction tank, and the flocculation reaction tank is used to mix and stir the sewage and the flocculant and then introduce them into the sedimentation tank for sedimentation; the sludge formed after sedimentation is introduced into the sludge treatment component for dehydration treatment; the supernatant after sedimentation is introduced into the filtration tank, and a filter layer is arranged in the filtration tank to filter the supernatant, and finally clear water that can be recycled is obtained.

[0006] Preferably, the chemical dosing assembly includes a mixing tank and a metering pump.

[0007] Preferably, a stirring assembly is further provided on the flocculation reaction tank.

[0008] Preferably, an activated carbon filter layer and a quartz sand filter layer are provided in the filter tank.

[0009] Preferably, the sludge treatment assembly includes a sludge thickening tank and a plate and frame filter press.

[0010] Preferably, an overflow layer and a water inlet channel are provided in the sedimentation tank. The water inlet channel enters the interior of the sedimentation tank after passing through the overflow layer. The bottom of the overflow layer is communicated with the sedimentation tank. The overflow layer is filled with filter media, and the top side of the overflow layer is communicated with the sedimentation tank.

[0011] The technical effects of the present utility model are mainly reflected in that through the synergistic effect of the chemical dosing assembly, the flocculation reaction tank and the sedimentation tank, rapid flocculation and sedimentation of sewage are realized, so that the sedimentation effect of sewage is better, the sewage treatment efficiency is improved and the working time is shortened. Further filtration of floating substances, COD, bacteria, etc. is also carried out through the filter tank, so as to obtain recycled clear water, improve economic benefits, achieve the purpose of saving water and environmental protection, and effectively collect, store and clean sludge through the sludge treatment assembly, avoiding sludge accumulation and affecting the surrounding environment. Description of the Drawings

[0012] Figure 1 It is a system connection schematic diagram of the present utility model.

[0013] The reference numerals are: 1 - sewage collection tank, 2 - flocculation reaction tank, 21 - stirring assembly, 3 - sedimentation tank, 31 - overflow layer, 32 - water inlet channel, 4 - filter tank, 41 - filter layer, 5 - clear water tank, 6 - chemical dosing assembly, 61 - mixing tank, 62 - metering pump, 7 - sludge treatment assembly, 71 - sludge thickening tank, 72 - plate and frame filter press. Detailed Description of the Preferred Embodiment

[0014] The following further details the specific embodiments of the present utility model in conjunction with the drawings, so that the technical solutions of the present utility model are easier to understand and master.

[0015] In this embodiment, it should be understood that the orientation or positional relationship indicated by terms such as "middle", "upper", "lower", "top", "right side", "left end", "above", "back", "middle part", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, 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 cannot be understood as a limitation to the present invention.

[0016] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically described, the connection or fixing method can be bolt fixing, pin fixing, or pin shaft connection, etc., which are commonly used in the prior art. Therefore, it will not be elaborated in this embodiment.

[0017] The utility model provides a sewage treatment and water recycling system for construction sites, as Figure 1 shown, which includes a sewage collection tank 1, a flocculation reaction tank 2, a sedimentation tank 3, a filtration tank 4, and a clear water tank 5 that are sequentially connected in the forward direction of the sewage. It also includes a chemical dosing component 6 connected to the flocculation reaction tank 2 and a sludge treatment component 7 connected to the bottom of the sedimentation tank 3. The chemical dosing component 6 adds a certain amount of flocculant into the flocculation reaction tank 2, and the flocculation reaction tank 2 is used to mix and stir the sewage and the flocculant and then introduce them into the sedimentation tank 3 for sedimentation. The sludge formed after sedimentation is introduced into the sludge treatment component 7 for dehydration treatment. The supernatant after sedimentation is introduced into the filtration tank 4, and a filter layer 41 is arranged in the filtration tank 4 to filter the supernatant, and finally, recyclable clear water is obtained. Through the synergistic effect of the chemical dosing component 6, the flocculation reaction tank 2, and the sedimentation tank 3, rapid flocculation and sedimentation of sewage are realized, the sedimentation effect of sewage is better, the sewage treatment efficiency is improved, and the working time is shortened. The filtration tank 4 further filters floating substances, COD, bacteria, etc., so as to obtain recyclable clear water, improve economic benefits, achieve the purpose of saving water and environmental protection, and effectively collect, store, and clean the sludge through the sludge treatment component 7, avoiding sludge accumulation and affecting the surrounding environment.

[0018] Preferably, the chemical dosing component 6 includes a mixing tank 61 and a metering pump 62. After the chemical agent and water are mixed in the mixing tank 61, they are pumped and sent to the flocculation reaction tank 2 in proportion through the metering pump 62.

[0019] Preferably, a stirring component 21 is further arranged on the flocculation reaction tank 2 for continuously stirring the sewage and the flocculant in the flocculation reaction tank 2.

[0020] Preferably, an activated carbon filter layer and a quartz sand filter layer are arranged in the filtration tank 4, so that the sediment supernatant introduced into the filtration tank 4 sequentially passes through the activated carbon filter layer and the quartz sand filter layer, thereby filtering out floating substances, COD, and bacteria in the supernatant for cleaning.

[0021] Preferably, the sludge treatment component 7 includes a sludge thickening tank 71 and a plate and frame filter press 72. The sludge thickening tank 71 is a tank structure for collecting and storing the sludge sedimented in the high-efficiency sedimentation tank 3. The plate and frame filter press 72 extrudes the sludge after wrapping the sludge with cloth, so that the sludge is dehydrated into blocks, which is convenient for transportation and removal.

[0022] Preferably, an overflow layer 31 and a water inlet channel 32 are arranged in the sedimentation tank 3. The water inlet channel 32 passes through the overflow layer 31 and then enters the interior of the sedimentation tank 3. The bottom of the overflow layer 31 is communicated with the sedimentation tank 3. The overflow layer 31 is filled with filter media for blocking impurities. The top side of the overflow layer 31 is communicated with the sedimentation tank 3.

[0023] The technical effects of the present utility model are mainly reflected as follows: Through the synergistic effect of the chemical dosing assembly, the flocculation reaction tank and the sedimentation tank, rapid flocculation and sedimentation of sewage are achieved, making the sedimentation effect of sewage better, improving the sewage treatment efficiency and shortening the working time. Further filtration of floating substances, COD, bacteria, etc. is also carried out through the filter tank, so as to obtain clear water that can be recycled, improve economic benefits, achieve the purpose of saving water and environmental protection, and effectively collect, store and clean the sludge through the sludge treatment assembly, avoiding sludge accumulation and affecting the surrounding environment.

[0024] Of course, the above are only typical examples of the present utility model. In addition, the present utility model can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present utility model.

Claims

1. A construction site sewage treatment water recycling system, characterized in that: The method comprises a sewage collection tank, a flocculation reaction tank, a sedimentation tank, a filtration tank and a clear water tank which are sequentially connected along the direction of the sewage flow, and also comprises a dosing component connected to the flocculation reaction tank and a sludge treatment component connected to the bottom of the sedimentation tank; the dosing component adds a certain amount of flocculant into the flocculation reaction tank, and uses the flocculation reaction tank to mix and stir the sewage and the flocculant and pass them into the sedimentation tank for sedimentation; the sludge formed after the sedimentation is passed into the sludge treatment component for dehydration treatment; The supernatant after precipitation is passed into a filter pool, in which a filter layer is arranged to filter the supernatant, and finally obtain clean water that can be recycled.

2. A construction site sewage treatment water recycling system as claimed in claim 1, characterized in that: The dosing assembly comprises a stirring tank and a metering pump.

3. A construction site sewage treatment water recycling system as claimed in claim 1, characterized in that: The flocculation reaction tank is also provided with a stirring component.

4. A construction site sewage treatment water recycling system as claimed in claim 1, characterized in that: An activated carbon filter layer and a quartz sand filter layer are arranged in the filter pool.

5. A construction site sewage treatment water recycling system as claimed in claim 1, characterized in that: The sludge treatment assembly includes a sludge thickening tank and a plate and frame filter press.

6. A construction site sewage treatment water recycling system as claimed in claim 1, characterized in that: An overflow layer and a water inlet channel are provided in the sedimentation tank. The water inlet channel passes through the overflow layer and enters the interior of the sedimentation tank. The bottom of the overflow layer is connected to the sedimentation tank. The overflow layer is filled with filter material, and the top side of the overflow layer is connected to the sedimentation tank.

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