Electroplating wastewater spray evaporation separation device driven by ground source heat pump

Abstract

The utility model provides an electroplating wastewater spray evaporation separation device driven by a ground source heat pump, and belongs to the field of sewage treatment. Comprising a buried coil, a circulating water pump, an evaporator, a condenser, a cascade heat exchanger, a compressor, a throttle valve, a vortex fan, an evaporation separation tower, a flow calibration column, a liquid storage tank, a diaphragm pump, a safety valve, a pulse damper, a pressure nozzle, a hot air inlet pipeline, an electroplating wastewater inlet pipeline, a waste gas outlet pipeline and a bag-type dust collector. The device can operate at medium and low temperature (within 110 DEG C), does not need special equipment, is low in sealing requirement, low in material requirement, simple, convenient and low in operation cost, utilizes shallow geothermal energy as a low-temperature heat source, is convenient to obtain and low in requirement, can heat ambient air to the required temperature through the work of the ground source heat pump system, and is convenient to use. And air is used as a separation carrier for treating electroplating wastewater, and the separation carrier is convenient to obtain and is basically not limited by the environment.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, and in particular to an electroplating wastewater spray evaporation separation device driven by a soil source heat pump. Background Art

[0002] With the rapid development of the economy, the discharge of industrial wastewater, especially electroplating wastewater, continues to grow. In addition to heavy metal substances such as Cr, Cu, and Ni, electroplating wastewater also contains alkaline and acidic substances, as well as highly toxic cyanide compounds, which pose a great threat to the environment and human health. In order to effectively treat electroplating wastewater and reduce pollution to the environment, electroplating wastewater treatment technology is particularly important.

[0003] Evaporation separation technology is one of the commonly used methods for treating electroplating wastewater. This technology uses the principle of evaporation to evaporate water from the wastewater, concentrate and separate harmful substances in the wastewater, thereby realizing wastewater treatment and resource recycling. The concentration of electroplating wastewater generated in the production of enterprises or factories is approximately within 15%. Comprehensive comparison shows that among the current traditional treatment methods, only evaporation can effectively achieve "zero waste liquid discharge" of electroplating wastewater.

[0004] Traditional evaporation separation devices still have problems such as high energy consumption and cannot achieve both "zero waste liquid discharge" and high efficiency and energy saving at the same time. The root of evaporation separation devices requires water evaporation, and the latent heat required for evaporation is extremely large. Therefore, the current evaporation separation devices using traditional energy forms have the common problem of high energy consumption. How to develop an electroplating wastewater treatment device that can achieve "zero waste liquid discharge" and ensure high efficiency and energy saving operation is the main problem of wastewater treatment at present.

[0005] As a renewable low-grade energy source, geothermal energy is directly utilized without being restricted by diurnal and seasonal variations like wind and solar energy. It has the advantages of large reserves, green and pollution-free, and stable transmission, making it stand out among clean energy sources. The development and utilization of shallow geothermal energy is mainly based on soil source heat pump technology, which can convert low-grade heat sources in the strata into usable high-temperature heat sources, and can effectively solve the energy consumption problem in the evaporation and separation technology of electroplating wastewater.

[0006] Therefore, we made improvements to this problem and proposed a soil source heat pump driven electroplating wastewater spray evaporation separation device. Utility Model Content

[0007] The purpose of the utility model is to address the current problems of high energy consumption and inability to achieve both "zero waste liquid discharge" and high efficiency energy saving.

[0008] In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions:

[0009] A ground source heat pump driven electroplating wastewater spray evaporation separation device is used to improve the above problems.

[0010] The utility model is specifically as follows:

[0011] It includes an underground coil, the outside of which is connected in sequence with a circulating water pump, an evaporator, a condenser, a cascade heat exchanger, a compressor, a throttle valve, a vortex fan, an evaporation separation tower, a flow calibration column, a liquid storage tank, a diaphragm pump, a safety valve, a pulse damper, a pressure nozzle, a hot air inlet pipeline, an electroplating wastewater inlet pipeline, an exhaust gas outlet pipeline and a bag dust collector.

[0012] As the preferred technical solution of the present invention, the soil source heat pump composed of the evaporator, condenser, cascade heat exchanger, compressor and throttle valve can use the circulating water in the buried pipe as a low-temperature heat source and heat the ambient air from 20°C to 100-110°C. Compared with the device using an electric heater, it achieves high efficiency and energy saving.

[0013] As a preferred technical solution of the present invention, the cascade heat pump composed of the evaporator, condenser, cascade heat exchanger, compressor and throttle valve has a wider temperature range and lower requirements for low-temperature heat sources compared to single-stage heat pumps.

[0014] As a preferred technical solution of the present invention, the evaporator and the condenser both adopt shell and tube heat exchangers, which have high heat transfer efficiency, compact and lightweight structure, and strong adaptability to heat exchange media and working conditions.

[0015] As a preferred technical solution of the present invention, the pressure nozzle is arranged at the inner top of the evaporation separation tower, and the pressure nozzle is communicated with the pulse damper through a pipeline.

[0016] As a preferred technical solution of the present invention, the flow calibration column, the liquid storage tank and the diaphragm pump are interconnected and controlled through pipelines and valves.

[0017] As a preferred technical solution of the present invention, the bottom of the evaporation separation tower and the bag dust collector can discharge crystallized salt powder, and the buried coil is arranged inside the soil.

[0018] As a preferred technical solution of the present invention, the electroplating wastewater inlet pipeline is located at the top of the evaporation separation tower and is interconnected with the pressure nozzle, and the waste gas outlet pipeline is located at the bottom of the evaporation separation tower and is interconnected with the bag dust collector.

[0019] As a preferred technical solution of the present invention, the evaporator is interconnected with the circulating water pump, the compressor and the throttle valve respectively.

[0020] As a preferred technical solution of the present invention, the cascade heat exchanger is interconnected with the evaporator through the throttle valve and the compressor, and the cascade heat exchanger is also interconnected with the condenser through the throttle valve and the compressor.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the solution of the present utility model:

[0023] 1. The device can operate at medium and low temperatures (within 110°C) without the need for special equipment, low sealing requirements, few consumables, low material requirements, simple and convenient, and low operating costs. It uses shallow geothermal energy as a low-temperature heat source, which is easy to obtain and has low requirements. The ambient air can be heated to the required temperature through the operation of the soil source heat pump system, achieving high efficiency and energy saving. Air is used as a separation carrier to treat electroplating wastewater. The separation carrier is easy to obtain and is basically not restricted by the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the electroplating wastewater spray evaporation separation device driven by a soil source heat pump provided by the utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of the electroplating wastewater spray evaporation separation device driven by a soil source heat pump provided by the utility model;

[0026] Figure 3 This is a partial cross-sectional structural diagram of the electroplating wastewater spray evaporation separation device driven by a soil source heat pump provided by the utility model;

[0027] Figure 4 This is a schematic diagram of the overall partial structure of the electroplating wastewater spray evaporation separation device driven by a soil source heat pump provided by the utility model;

[0028] Figure 5 This is a schematic diagram of the overall local structure of the electroplating wastewater spray evaporation separation device driven by a soil source heat pump provided by the utility model.

[0029] Indicated in the figure:

[0030] 1. Underground coil; 2. Circulating water pump; 3. Evaporator; 4. Condenser; 5. Cascade heat exchanger; 6. Compressor; 7. Throttle valve; 8. Vortex fan; 9. Evaporation separation tower; 10. Flow calibration column; 11. Liquid storage tank; 12. Diaphragm pump; 13. Safety valve; 14. Pulse damper; 15. Pressure nozzle; 16. Hot air inlet pipeline; 17. Electroplating wastewater inlet pipeline; 18. Exhaust gas outlet pipeline; 19. Bag filter. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0032] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] like Figure 1 and Figure 3 As shown, this embodiment proposes a soil source heat pump driven electroplating wastewater spray evaporation separation device, including an underground coil 1, the outside of the underground coil 1 is connected in sequence with a circulating water pump 2, an evaporator 3, a condenser 4, a cascade heat exchanger 5, a compressor 6, a throttle valve 7, a vortex fan 8, an evaporation separation tower 9, a flow calibration column 10, a liquid storage tank 11, a diaphragm pump 12, a safety valve 13, a pulse damper 14, a pressure nozzle 15, a hot air inlet pipeline 16, an electroplating wastewater inlet pipeline 17, an exhaust gas outlet pipeline 18 and a bag filter. Dust collector 19, the circulating water in the buried coil 1 exchanges heat with the soil to obtain heat from shallow geothermal energy, and then enters the evaporator 3 after passing through the circulating water pump 2 to exchange heat with the working medium, thereby realizing the utilization of shallow geothermal energy. The inside of the evaporator 3 tube is R290, and the outside of the evaporator 3 tube is the buried pipe circulating water. The inside of the condenser 4 tube is R152a, and the outside of the condenser 4 tube is ambient air, wherein R290 and R152a exchange heat. The condenser 4 is located between the vortex fan 8 and the evaporation separation tower 9, and the ambient air is heated and sent to the evaporation separation tower 9 through the hot air pipeline.

[0036] like Figure 1 As shown, the soil source heat pump composed of the evaporator 3, the condenser 4, the cascade heat exchanger 5, the compressor 6 and the throttle valve 7 can use the circulating water in the buried pipe as a low-temperature heat source and heat the ambient air from 20°C to 100-110°C. Compared with the device using an electric heater, it achieves high efficiency and energy saving.

[0037] like Figure 1As shown, the cascade heat pump composed of the evaporator 3, the condenser 4, the cascade heat exchanger 5, the compressor 6 and the throttle valve 7 has a wider temperature range and lower requirements for the low-temperature heat source than a single-stage heat pump.

[0038] like Figure 1 As shown, both the evaporator 3 and the condenser 4 adopt shell and tube heat exchangers, which have high heat transfer efficiency, compact and lightweight structure, and strong adaptability to heat exchange medium and working conditions.

[0039] like Figure 3 As shown, the pressure nozzle 15 is arranged at the inner top of the evaporation separation tower 9. The pressure nozzle 15 is interconnected with the pulse damper 14 through a pipeline. The pulse damper 14 can absorb and disperse the impact energy, slow down the movement speed of the structure when it is impacted, thereby reducing the damage to the structure caused by the impact.

[0040] like Figure 1 As shown, the flow calibration column 10, the liquid storage tank 11 and the diaphragm pump 12 are interconnected and controlled by pipes and valves. By utilizing the communicating vessel principle and atmospheric pressure, the flow calibration column 10 can indirectly reflect the liquid level inside the liquid storage tank 11, which is more convenient.

[0041] like Figure 1 As shown, the bottom of the evaporation separation tower 9 and the bag dust collector 19 can discharge crystallized salt powder. The buried coil 1 is set inside the soil to discharge the internal crystallized salt. At the same time, the dust and particulate matter are intercepted on the surface of the bag through the bag dust collector 19, so that clean air can be discharged.

[0042] like Figure 3 As shown, the electroplating wastewater inlet pipe 17 is located at the top of the evaporation separation tower 9 and is interconnected with the pressure nozzle 15, and the exhaust gas outlet pipe 18 is located at the bottom of the evaporation separation tower 9 and is interconnected with the bag dust collector 19. The wastewater is discharged through the electroplating wastewater inlet pipe 17 and the generated exhaust gas is discharged through the exhaust gas outlet pipe 18.

[0043] like Figure 1 As shown, the evaporator 3 is interconnected with the circulating water pump 2, the compressor 6 and the throttle valve 7 respectively. The evaporator 3 can effectively reduce the temperature of the air or objects by absorbing heat from the surrounding environment.

[0044] like Figure 1 As shown, the cascade heat exchanger 5 is interconnected with the evaporator 3 through the throttle valve 7 and the compressor 6 , and the cascade heat exchanger 5 is also interconnected with the condenser 4 through the throttle valve 7 and the compressor 6 .

[0045] Specifically, when the electroplating wastewater spray evaporation separation device driven by the soil source heat pump is working: the wastewater in the liquid storage tank 11 enters the electroplating wastewater inlet pipe 17 through the diaphragm pump 12, and the liquid level inside the liquid storage tank 11 is observed by the flow calibration column 10. Then the wastewater enters the evaporation separation tower 9 through the electroplating wastewater inlet pipe 17. At the same time, the circulating water in the buried coil 1 exchanges heat with the soil to obtain the heat of shallow geothermal energy, and then enters the evaporator 3 after passing through the circulating water pump 2 to exchange heat with the working medium, realizing the utilization of shallow geothermal energy. The evaporator 3 tube is R29 0. The outside of the evaporator 3 tube is underground circulating water, the inside of the condenser 4 tube is R152a, and the outside of the condenser 4 tube is ambient air, wherein R290 and R152a are heat exchanged. The condenser 4 is located between the vortex fan 8 and the evaporation separation tower 9. The ambient air is heated and sent to the evaporation separation tower 9 through the hot air pipeline. Shallow geothermal energy is used as a low-temperature heat source, and the ambient air is heated from 20°C to 100-110°C to meet the hot air demand required for the evaporation and separation of electroplating wastewater. The exhaust gas generated in the evaporation separation tower 9 is treated and discharged through the bag dust collector 19.

[0046] All technical features in this embodiment can be freely combined according to actual needs.

[0047] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A ground source heat pump driven electroplating wastewater spray evaporation separation device, comprising an underground coil (1), characterized in that: The outside of the buried coil (1) is sequentially connected to a circulating water pump (2), an evaporator (3), a condenser (4), a cascade heat exchanger (5), a compressor (6), a throttle valve (7), a vortex fan (8), an evaporation separation tower (9), a flow calibration column (10), a liquid storage tank (11), a diaphragm pump (12), a safety valve (13), a pulse damper (14), a pressure nozzle (15), a hot air inlet pipeline (16), an electroplating wastewater inlet pipeline (17), an exhaust gas outlet pipeline (18), and a bag dust collector (19).

2. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1 is characterized in that: The soil source heat pump composed of the evaporator (3), condenser (4), cascade heat exchanger (5), compressor (6) and throttle valve (7) can use the circulating water in the buried pipe as a low-temperature heat source and heat the ambient air from 20°C to 100-110°C, thereby achieving high efficiency and energy saving compared to a device using an electric heater.

3. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1 is characterized in that: Compared with a single-stage heat pump, the cascade heat pump composed of the evaporator (3), condenser (4), cascade heat exchanger (5), compressor (6) and throttle valve (7) has a wider temperature range and lower requirements for low-temperature heat sources.

4. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1 is characterized in that: The evaporator (3) and the condenser (4) both adopt shell and tube heat exchangers, which have high heat transfer efficiency, compact and lightweight structure, and strong adaptability to heat exchange medium and working conditions.

5. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1 is characterized in that: The pressure nozzle (15) is arranged at the inner top of the evaporation separation tower (9), and the pressure nozzle (15) is communicated with the pulse damper (14) through a pipeline.

6. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1 is characterized in that: The flow calibration column (10), the liquid storage tank (11) and the diaphragm pump (12) are interconnected and controlled via pipelines and valves.

7. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1 is characterized in that: The bottoms of the evaporation separation tower (9) and the bag dust collector (19) can discharge crystallized salt powder, and the buried coil (1) is arranged inside the soil.

8. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1 is characterized in that: The electroplating wastewater inlet pipe (17) is located at the top of the evaporation separation tower (9) and is interconnected with the pressure nozzle (15), and the waste gas outlet pipe (18) is located at the bottom of the evaporation separation tower (9) and is interconnected with the bag dust collector (19).

9. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1, characterized in that: The evaporator (3) is interconnected with the circulating water pump (2), the compressor (6) and the throttle valve (7).

10. The electroplating wastewater spray evaporation separation device driven by a soil source heat pump according to claim 1, characterized in that: The cascade heat exchanger (5) is interconnected with the evaporator (3) through the throttle valve (7) and the compressor (6), and the cascade heat exchanger (5) is also interconnected with the condenser (4) through the throttle valve (7) and the compressor (6).

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