A concrete wastewater treatment system based on solar evaporation

Abstract

The utility model relates to a kind of concrete wastewater treatment system based on solar evaporation, including sedimentation tank, pH adjusting pool, evaporator, solar panel, condenser, condensate tank and PLC controller, sedimentation tank is connected wastewater inlet pipe by electromagnetic valve, pH adjusting pool is connected sedimentation tank by first water pump, evaporator is connected pH adjusting pool by second water pump, evaporator is equipped with electric heating device, solar panel is powered for electric heating device, evaporator is connected with condenser by steam pipe, condensate tank one side is connected with the condenser by water pipe, the other side is equipped with water outlet;Water inlet electromagnetic valve, first water pump and second water pump are electrically connected with PLC controller.The utility model makes full use of solar energy, reduces wastewater treatment cost;Wastewater is evaporated in evaporator to realize brine separation, and the water vapor of evaporation is condensed to form standard pure water, and the concentrated liquid not evaporated is formed into crystallization in crystallization pool, and it is convenient to carry out harmless treatment.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and relates to the treatment of concrete wastewater generated in building construction, specifically to a concrete wastewater treatment system based on solar evaporation. Background Technology

[0002] Concrete wastewater mainly originates from construction and cleaning processes at concrete mixing plants. Its composition is complex, containing a large amount of cement particles, sand and gravel debris, calcium ions, calcium hydroxide, and other substances. Direct discharge of such wastewater not only wastes water resources but also pollutes soil and water bodies, disrupting the ecological balance.

[0003] Traditional methods for treating concrete wastewater include sedimentation in sedimentation tanks, filtration, and chemical neutralization. However, these methods generally suffer from problems such as low treatment efficiency, high energy consumption, and the potential for secondary pollution. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the existing technology by proposing a concrete wastewater treatment system based on solar evaporation.

[0005] The technical solution of this utility model is as follows:

[0006] A concrete wastewater treatment system based on solar evaporation, characterized in that it includes a sedimentation tank, a pH adjustment tank, an evaporator, a solar panel, a condenser, a condensate tank, and a PLC controller; the sedimentation tank is connected to a wastewater inlet pipe via an inlet solenoid valve, the pH adjustment tank is connected to the sedimentation tank via a first water pump, the evaporator is connected to the pH adjustment tank via a second water pump, the evaporator is equipped with an electric heating device, the solar panel is connected to the electric heating device of the evaporator to supply power to the electric heating device, the evaporator and the condenser are connected via a steam pipe, one side of the condensate tank is connected to the condenser via a water pipe, and the other side of the condensate tank has a water outlet; the inlet solenoid valve, the first water pump, and the second water pump are all electrically connected to the PLC controller.

[0007] Furthermore, this utility model provides an acid-base dosing device above the pH adjustment tank. The acid-base dosing device is connected to the pH adjustment tank via a solenoid valve. The pH adjustment tank is equipped with a stirring device and a pH sensor. The acid-base dosing device, stirring device, and pH sensor are all electrically connected to a PLC controller.

[0008] Furthermore, a crystallization tank is provided below the condenser, and the crystallization tank is connected to the condenser through a crystallization valve.

[0009] Furthermore, multiple light sensors are evenly distributed around the solar panel, and each light sensor is electrically connected to the PLC controller.

[0010] This invention fully utilizes solar energy, a clean energy source, to significantly reduce energy consumption costs in wastewater treatment, aligning with the concept of green and environmentally friendly development. After evaporation in the evaporator, the wastewater undergoes brine separation. The evaporated water vapor is condensed in the condenser to generate compliant pure water, which can be directly discharged or reused in the concrete production process. The unevaporated concentrate enters the crystallization tank through the crystallization valve for centralized and harmless treatment. The PLC controller can adjust the angle of the solar panels to maximize sunlight reception and improve solar power generation efficiency. Attached Figure Description

[0011] Figure 1 This is a system structure diagram of this utility model.

[0012] Attached reference numerals: 1. Sedimentation tank; 2. pH adjustment tank; 3. Evaporator; 4. Solar panel; 5. Condenser; 6. Condensate tank; 7. PLC controller; 8. Inlet solenoid valve; 9. Wastewater inlet pipe; 10. First water pump; 11. Second water pump; 12. Steam pipe; 13. Outlet pipe; 14. Acid-base dosing device; 15. Stirring device; 16. Crystallization tank; 17. Crystallization valve. Detailed Implementation

[0013] like Figure 1 As shown, this utility model includes a sedimentation tank 1, a pH adjustment tank 2, an evaporator 3, a solar panel 4, a condenser 5, a condensate tank 6, and a PLC controller 7. The sedimentation tank 1 is connected to a wastewater inlet pipe 9 via an inlet solenoid valve 8. The pH adjustment tank 2 is connected to the sedimentation tank 1 via a first water pump 10. The evaporator 3 is connected to the pH adjustment tank 2 via a second water pump 11. The evaporator 3 is equipped with an electric heating device. The solar panel 4 is connected to the electric heating device of the evaporator 3 to supply power to the electric heating device. The evaporator 3 and the condenser 5 are connected via a steam pipe 12. One side of the condensate tank 6 is connected to the condenser 5 via a water pipe, and the other side of the condensate tank 6 is equipped with an outlet pipe 13. The inlet solenoid valve 8, the first water pump 10, and the second water pump 11 are all electrically connected to the PLC controller 7.

[0014] In a specific implementation of this utility model, an acid-base dosing device 14 can be installed above the pH adjustment tank 2. The acid-base dosing device 14 is connected to the pH adjustment tank through a solenoid valve, and a stirring device 15 and a pH sensor are installed in the pH adjustment tank 2. The acid-base dosing device 14, the stirring device 15 and the pH sensor are all electrically connected to the PLC controller.

[0015] In a specific implementation of this utility model, a crystallization tank 16 can be placed below the condenser 5, and the crystallization tank 16 is connected to the condenser 5 through a crystallization valve 17.

[0016] In a specific implementation of this utility model, multiple light sensors can be evenly arranged around the solar panel 4, and each light sensor is electrically connected to the PLC controller.

[0017] The working principle of this utility model is as follows:

[0018] Concrete wastewater enters sedimentation tank 1 through wastewater inlet pipe 9. Large suspended solids, gravel, silt and other particles in the wastewater settle naturally, and solid-liquid separation is initially achieved in the sedimentation tank. The solenoid valve 8 on the wastewater inlet pipe can be switched on and off by a PLC controller according to the water volume in the sedimentation tank.

[0019] The first water pump 10 pumps the settled water from the sedimentation tank 1 into the pH adjustment tank 2. Since the concrete wastewater is highly alkaline, a pH sensor can detect the pH value of the water in the pH adjustment tank and transmit the information to the PLC controller. When the pH value exceeds the set threshold, the PLC controller activates the acid-base dosing device 14 to add chemicals to the pH adjustment tank 5. The chemicals are then stirred evenly by the agitator 11 to adjust the pH value of the wastewater to between 7 and 9.

[0020] The second water pump 11 draws water from the pH adjustment tank 2 into the evaporator 3. The electric heating device in the evaporator heats and evaporates the water, and the generated water vapor enters the condenser 5 through the steam pipe 12. After being cooled by the condenser, it becomes pure water, enters the condensate tank 6, and is discharged or recycled through the outlet pipe 13.

[0021] Unevaporated concentrate in evaporator 3 can enter crystallization tank 16 through crystallization valve 17, where crystals are formed. The crystallization tank is cleaned regularly, and the crystals are transported to a professional treatment plant for centralized harmless treatment.

[0022] The solar panel 4 powers the electric heating device inside the evaporator. To improve solar power generation efficiency, light sensors are evenly arranged around the solar panel, and an electric rotating mechanism is installed below the solar panel. The light sensors monitor the light intensity at various locations on the solar panel. The PLC controller receives and analyzes the light sensor signals. When the difference in light intensity between any two light sensors is greater than 10%, the PLC controller controls the rotating mechanism to adjust the angle of the solar panel, so that the solar panel can receive sunlight to the maximum extent.

Claims

1. A concrete wastewater treatment system based on solar evaporation, characterized in that: The system includes a sedimentation tank, a pH adjustment tank, an evaporator, a solar panel, a condenser, a condensate tank, and a PLC controller. The sedimentation tank is connected to a wastewater inlet pipe via an inlet solenoid valve. The pH adjustment tank is connected to the sedimentation tank via a first water pump. The evaporator is connected to the pH adjustment tank via a second water pump. The evaporator is equipped with an electric heating device. The solar panel is connected to the electric heating device of the evaporator to supply power to the electric heating device. The evaporator and the condenser are connected via a steam pipe. One side of the condensate tank is connected to the condenser via a water pipe, and the other side of the condensate tank has an outlet. The inlet solenoid valve, the first water pump, and the second water pump are all electrically connected to the PLC controller.

2. The concrete wastewater treatment system based on solar evaporation according to claim 1, characterized in that: An acid-base dosing device is installed above the pH adjustment tank. The acid-base dosing device is connected to the pH adjustment tank through a solenoid valve. The pH adjustment tank is equipped with a stirring device and a pH sensor. The acid-base dosing device, stirring device, and pH sensor are all electrically connected to a PLC controller.

3. The concrete wastewater treatment system based on solar evaporation according to claim 1, characterized in that: A crystallization tank is located below the condenser, and the crystallization tank is connected to the condenser via a crystallization valve.

4. The concrete wastewater treatment system based on solar evaporation according to claim 1, characterized in that: Multiple light sensors are evenly distributed around the solar panel, and each light sensor is electrically connected to the PLC controller.

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