Integrated device for purifying and recycling waste water of concrete mixing station

Abstract

The utility model discloses an integrated device for purifying and recycling waste water of a concrete mixing station, which is arranged in an integrated system for purifying and recycling waste water of the concrete mixing station and is characterized by comprising a water inlet tank, a water outlet tank, and an oil separation tank, an adjusting tank and a sedimentation tank which are arranged between the water inlet tank and the water outlet tank and are connected in sequence, the sedimentation tank comprises a vertical flow sedimentation tank, an inclined tube sedimentation tank and a horizontal flow sedimentation tank, a water outlet of the adjusting tank is connected with the vertical flow sedimentation tank for full sedimentation of wastewater, and a water outlet of the horizontal flow sedimentation tank is connected to the water outlet tank. According to the scheme, the PH value is adjusted through organic acid, sewage of the mixing station is completely treated to reach the standard and reaches the discharge standard, and the integrated device is small in occupied area, easy and convenient to install, easy to transport, suitable for adjusting the corresponding position and suitable for the construction site environment with complex conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment for concrete mixing plants, in particular to an integrated device for purifying and recycling wastewater from concrete mixing plants. Background Art

[0002] Sewage treatment is a process of purifying sewage to meet the water quality requirements for discharging into a certain water body or reusing it. Sewage treatment is widely applied in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and is also increasingly entering the daily life of ordinary people.

[0003] The wastewater sources of concrete mixing plants mainly include the wastewater from concrete mixer trucks and site flushing, the wastewater generated by the sand and stone separation system, and the rainwater in the plant area, etc. The main characteristics are high sediment content, high suspended solids, and containing various ions such as Ca 2+ , Na + . K + , SO 4 2 - and OH - etc. The wastewater from concrete mixing plants needs to be treated before being discharged or recycled. Therefore, a wastewater purification and treatment device for concrete mixing plants is required, which not only meets the requirements of wastewater treatment in the plant area, but also needs to consider miniaturization and integration for easy on-site installation and position adjustment. Content of the Utility Model

[0004] Based on the above problems, the utility model proposes an integrated device for purifying and recycling wastewater from concrete mixing plants, which integrally treats the sewage in the reservoir. The specific technical solutions are as follows.

[0005] An integrated device for purifying and recycling wastewater from concrete mixing plants is arranged in the overall system for purifying and recycling wastewater from concrete mixing plants, and includes an inlet tank, an outlet tank, and an oil separation tank, an adjustment tank, and a sedimentation tank which are sequentially connected between the two; the sedimentation tank includes a mixing sedimentation tank, an inclined tube sedimentation tank, and a vertical flow sedimentation tank. The water outlet of the adjustment tank is connected to the mixing sedimentation tank for mixing and sedimentation of wastewater, and the water outlet of the vertical flow sedimentation tank is connected to the outlet tank.

[0006] Specifically, the inlet tank is connected to an external wastewater reservoir.

[0007] Specifically, the inlet tank is connected to the oil separation tank through an oil separation plate.

[0008] Specifically, the adjustment tank is connected to a chemical dosing barrel, and is also provided with a chemical dosing regulating pump for accurately regulating the chemical dosage.

[0009] Specifically, the chemicals in the chemical dosing barrel are replaceable chemicals, and the chemical types include PAC water-soluble inorganic polymer, organic acid, and PAM polyacrylamide.

[0010] Specifically, a chemical dosing agitator for fully stirring the chemicals is further provided in the chemical dosing tank.

[0011] Specifically, a mixing agitator for stirring the wastewater after adjusting the chemicals and enabling it to fully settle is further provided in the mixing sedimentation tank.

[0012] Specifically, a first sewage discharge valve and a second sewage discharge valve are respectively provided in the inclined tube sedimentation tank and the vertical flow sedimentation tank, and a vibration motor is further provided in the vertical flow sedimentation tank.

[0013] Advantages of the present utility model: The present utility model provides an integrated device for purifying and recycling wastewater from a concrete mixing plant, which not only meets the requirements for wastewater treatment in the station area, but also needs to consider miniaturization and integration, facilitating on-site installation and position adjustment. It is designed with multiple sedimentation tanks such as a mixing sedimentation tank, an inclined tube sedimentation tank, and a vertical flow sedimentation tank to sediment the secondary filtrate after acid-base neutralization, perform solid-liquid separation, and further obtain bottom sediments and tertiary filtrate; by adjusting the pH value with organic acids, the sewage from the mixing plant is completely treated up to standard and meets the discharge standard. The integrated device occupies a small area, is easy to install, simple to transport, can be appropriately adjusted to the corresponding position, and is suitable for complex construction site environments. Description of the Drawings

[0014] Figure 1 is the overall architecture diagram of the integrated device for purifying and recycling wastewater from a concrete mixing plant in an embodiment of the present utility model. Detailed Embodiments

[0015] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described with reference to the accompanying drawings.

[0016] The present utility model provides an integrated device for purifying and recycling wastewater from a concrete mixing plant, which is arranged in the overall system for purifying and recycling wastewater from a concrete mixing plant. As Figure 1 shown, an integrated device for purifying and recycling wastewater from a concrete mixing plant is arranged in the overall system for purifying and recycling wastewater from a concrete mixing plant, including a water inlet tank, a water outlet tank, and an oil separation tank, an adjustment tank, and a sedimentation tank that are sequentially connected between the two; the sedimentation tank includes a mixing sedimentation tank, an inclined tube sedimentation tank, and a vertical flow sedimentation tank. The water outlet of the adjustment tank is connected to the mixing sedimentation tank for mixing and sedimentation of the wastewater, and the water outlet of the vertical flow sedimentation tank is connected to the water outlet tank.

[0017] In a preferred embodiment, the water inlet tank is connected to an external wastewater storage tank.

[0018] In a preferred embodiment, the water inlet tank and the oil separation tank are connected by an oil separation plate.

[0019] In a preferred embodiment, the regulating tank is connected to a chemical dosing tank, and a chemical dosing regulating pump for accurately regulating the chemical dosage is also provided.

[0020] In a preferred embodiment, the chemical in the chemical dosing tank is a replaceable chemical, and the chemical types include PAC water-soluble inorganic polymer, organic acid, and PAM polyacrylamide.

[0021] In a preferred embodiment, the chemical dosing tank is also provided with a chemical dosing stirrer for fully stirring the chemical.

[0022] In a preferred embodiment, the mixing sedimentation tank is also provided with a mixing stirrer for stirring the wastewater after the chemical is adjusted to make it fully sediment.

[0023] In a preferred embodiment, the inclined tube sedimentation tank and the vertical flow sedimentation tank are respectively provided with a sewage discharge valve 1 and a sewage discharge valve 2, and the vertical flow sedimentation tank is also provided with a vibration motor.

[0024] In this embodiment, the concrete mixer truck of the concrete mixing plant receives water at a designated position. After flushing the truck, the water is drained into the water receiving hopper and then enters the sand and gravel separator for sand and gravel separation; the wastewater after sand and gravel separation is pumped into a filter press by a screw pump for filtration to obtain filter cake and secondary filtrate; the secondary filtrate is introduced into the integrated device proposed by the present utility model by a submersible sewage pump, and an organic acid is added to adjust the pH value of the filtrate until the pH value of the filtrate is adjusted to 6 - 9, and the reaction time is 20 - 60 min; the integrated device is designed with multi-stage sedimentation tanks such as vertical flow, inclined tube, and mixing to carry out sedimentation treatment on the secondary filtrate after acid-base neutralization, solid-liquid separation, further obtaining bottom sediments and tertiary filtrate, discharging the liquid to the clear water tank to meet the three-level standard of comprehensive sewage discharge; finally, the tertiary filtrate is used as recycled water or directly discharged.

[0025] In an embodiment, the parameters of each part component of the integrated device are as follows:

[0026] (1) Inlet tank

[0027] Function: Store and regulate the influent volume, primary sedimentation;

[0028] Parameter size: L*B*H = 700*1000*2000mm;

[0029] Others: Water distribution, sludge discharge.

[0030] (2) Oil separation tank

[0031] Function: Isolate oil and floating impurities, gravity sedimentation;

[0032] Parameter size: L*B*H = 700*1000*2000mm;

[0033] Others: water distribution, oil separation, sludge discharge.

[0034] (3) Equalization tank

[0035] Function: Add special chemicals, mix and precipitate.

[0036] Parameter dimensions: L*B*H = 600*1000*2000mm;

[0037] Others: Equipped with a chemical dosing system, water distribution, chemical dosing, sludge discharge.

[0038] (4) Mixing sedimentation tank

[0039] Function: The main reaction area for physical and chemical flocculation, generating and precipitating sludge.

[0040] Parameter dimensions: L*B*H = 2000*1000*2000mm;

[0041] Others: Equipped with a stirring system, water distribution, sludge discharge.

[0042] (5) Inclined tube sedimentation tank

[0043] Function: Utilize the large specific surface area of the inclined tube packing to separate sludge from sewage, and the sludge adheres and precipitates on the inclined tube packing and the bottom of the tank, and the clear water enters the next unit from the overflow weir;

[0044] Parameter dimensions: L*B*H = 2000*1000*2000mm;

[0045] Others: Equipped with a set of inclined tube packing, water distribution, sludge discharge.

[0046] (6) Vertical flow sedimentation tank

[0047] Function: The water coming from the inclined tube sedimentation tank is further separated from mud and water in this area through a countercurrent method;

[0048] Parameter dimensions: L*B*H = 1300*1000*2000mm;

[0049] Others: Equipped with a set of vibration motors, water distribution, sludge discharge.

[0050] (7) Effluent tank

[0051] Function: Store and regulate the effluent volume;

[0052] Parameter dimensions: L*B*H = 700*1000*2000mm;

[0053] Others: Water distribution, sludge discharge.

[0054] (8) Other equipment

[0055] 1 set of chemical dosing system;

[0056] 1 set of automatic control system

[0057] In this embodiment, a dedicated chemical dosing system is designed for this device. The special treatment chemical is first dissolved in clean water in the dosing tank (40 - 50 L of water is mixed with each kg of chemical), and is fully dissolved under the action of the dosing stirrer. Then, the metering pump is used to strictly control the dosage of the added chemical to meet the treatment requirements.

[0058] In this embodiment, the integrated device needs to discharge sludge regularly to prevent a large amount of sediment from accumulating at the bottom of the device, resulting in the device not achieving the expected treatment effect. During the long-term use of the device, sludge needs to be discharged at least once a week, and each time it should be no less than 5 minutes.

[0059] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated device for purifying and recovering wastewater from a concrete mixing station, which is arranged in an overall system for purifying and recovering wastewater from a concrete mixing station, and is characterized in that: It includes an inlet tank, an outlet tank, and a grease trap, a regulating tank and a sedimentation tank which are sequentially connected therebetween; the sedimentation tank includes a mixing sedimentation tank, an inclined tube sedimentation tank and a vertical flow sedimentation tank, the outlet of the regulating tank is connected to the mixing sedimentation tank for mixed sedimentation of wastewater, and the outlet of the vertical flow sedimentation tank is connected to the outlet tank.

2. The integrated device for purifying and recycling wastewater from a concrete mixing station according to claim 1 is characterized in that: The water inlet tank is connected to an external wastewater storage tank.

3. The integrated device for purifying and recycling wastewater from a concrete mixing station according to claim 1 is characterized in that: The water inlet tank and the grease trap are connected via an grease trap plate.

4. The integrated device for purifying and recycling wastewater from a concrete mixing station according to claim 1 is characterized in that: The regulating tank is connected to the dosing barrel and is also provided with a dosing regulating pump for accurately regulating the dosage of the medicine.

5. The integrated device for purifying and recycling wastewater from a concrete mixing station according to claim 4 is characterized in that: The medicine in the medicine adding barrel is replaceable.

6. The integrated device for purifying and recycling wastewater from a concrete mixing station according to claim 5 is characterized in that: The dosing barrel is also provided with a dosing stirrer for fully stirring the medicine.

7. The integrated device for purifying and recycling wastewater from a concrete mixing station according to claim 1 is characterized in that: The mixing sedimentation tank is also provided with a mixing agitator for agitating the wastewater conditioned with the reagent to allow it to fully settle.

8. The integrated device for purifying and recycling wastewater from a concrete mixing station according to claim 1 is characterized in that: The inclined tube sedimentation tank and the vertical flow sedimentation tank are respectively provided with a first sewage valve and a second sewage valve, and the vertical flow sedimentation tank is also provided with a vibration motor.

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