Desulfurization wastewater wind energy synergistic evaporation device and method

Abstract

The invention relates to the field of desulfurization wastewater treatment, in particular to a wind-energy synergistic evaporation device and method for desulfurization wastewater. The device comprises an evaporation device, an outlet of the evaporation device is connected with an inlet of the evaporation pond; a first inlet of the evaporation device is connected with an outlet of the evaporation pond through a submersible pump; a second inlet of the evaporation device is connected with an outlet of the cleaning device; and the submersible pump and the cleaning device are electrically connected with the automatic control device. The invention solves the problems of low evaporation rate, dependence on a large-area evaporation pond and manual maintenance in the prior art, and has the advantages of high efficiency, energy conservation, high automation degree and low maintenance cost.

Description

Technical Field

[0001] The present invention relates to the field of desulfurized wastewater treatment, and particularly to a desulfurized wastewater wind energy enhanced evaporation device and method. Background Art

[0002] In the existing industrial wastewater treatment field, the treatment of high-salt wastewater has always been the focus and difficulty of the industry. High-salt wastewater generally refers to wastewater containing high concentrations of dissolved solids (such as inorganic salts like sodium chloride and sodium sulfate). If such wastewater is directly discharged without effective treatment, it will cause serious environmental pollution, including soil salinization, water body ecological imbalance, etc. Evaporation crystallization, as a traditional and effective method for treating high-salt wastewater, its basic principle is to evaporate the water in the wastewater by heating. As the water content decreases, the salt gradually reaches saturation and precipitates crystals, thereby achieving the separation of salt and water.

[0003] However, there are still many limitations in the technical implementation of the currently widely used high-salt wastewater evaporation crystallization process. Traditionally, in order to utilize natural conditions to accelerate the evaporation of wastewater, a natural evaporation pond is often set up, relying on the local climate characteristics where the evaporation amount is greater than the precipitation amount to achieve the natural evaporation of wastewater. However, this method is greatly restricted by geographical and climatic conditions, and the evaporation rate is slow. Especially in rainy seasons or areas with insufficient evaporation, the wastewater treatment efficiency is low and it is difficult to meet the needs of large-scale wastewater treatment.

[0004] To overcome the limitations of the natural evaporation pond, some technical solutions add a mist evaporator in the natural evaporation pond, and the wastewater is atomized into tiny water droplets by a mist nozzle and sprayed into the atmosphere, so as to increase the contact area and suspension time of the water droplets with the air. In theory, the evaporation process can be accelerated. However, in actual operation, the atomized water droplets in the air are still affected by various factors such as environmental temperature, humidity, and wind speed, resulting in a considerable part of the water droplets condensing into water and falling back into the evaporation pond without sufficient evaporation, and the actual evaporation efficiency improvement is limited.

[0005] In addition, another significant problem of the existing evaporation crystallization process is the low evaporation rate, which directly limits the wastewater treatment scale and treatment efficiency. To make up for the insufficient evaporation rate, the existing technology often needs to build a large-area evaporation pond to accommodate the high-salt wastewater that cannot be evaporated in time, and indirectly increase the evaporation rate by increasing the evaporation area. However, this approach not only occupies a large amount of land resources and increases the construction cost, but also during the treatment process, as the salt accumulates continuously, a thick salt layer will gradually form at the bottom of the evaporation pond, which needs to be cleaned regularly. Summary of the Invention

[0006] The present invention provides a desulfurized wastewater wind energy enhanced evaporation device and method, effectively solving the problems of low efficiency, scaling, and manual dependence in the evaporation treatment of desulfurized wastewater in the prior art.

[0007] To achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides a desulfurized wastewater wind energy enhanced evaporation device, including an evaporation device; the outlet of the evaporation device is connected to the inlet of the evaporation pond; the first inlet of the evaporation device is connected to the outlet of the evaporation pond through a submersible pump; the second inlet of the evaporation device is connected to the outlet of the cleaning device; both the submersible pump and the cleaning device are electrically connected to the automatic control device.

[0008] Preferably, a spray module and a drying module are arranged in the evaporation device; the spray module is used to spray the desulfurized wastewater onto the drying module.

[0009] Preferably, the drying module includes a non-metallic support frame; an evaporation carrier is arranged inside the non-metallic support frame.

[0010] Preferably, guide wheels are arranged at the bottom of the non-metallic support frame.

[0011] Preferably, the base material of the evaporation carrier includes one or more of nylon, polycarbonate, polyester, polypropylene, polyethylene, and polyvinyl chloride.

[0012] Preferably, the cleaning device includes a flushing pump, a medicine preparation water tank, a valve, and a power control box; the outlet of the medicine preparation water tank is connected to the inlet of the flushing pump; a valve is arranged at the outlet of the flushing pump; both the flushing pump and the valve are electrically connected to the power control box; the power control box is electrically connected to the automatic control device.

[0013] Preferably, multiple branch pipelines are arranged at the outlet of the flushing pump.

[0014] Preferably, a frequency converter is arranged on the submersible pump; the frequency converter is electrically connected to the automatic control device.

[0015] Preferably, a power supply incoming line circuit breaker and a relay connected thereto are arranged inside the automatic control device.

[0016] In the second aspect, the present invention provides a desulfurized wastewater wind energy enhanced evaporation method, including the following steps: The submersible pump transports the desulfurized wastewater in the evaporation pond to the evaporation device; the evaporation device evaporates the desulfurized wastewater, and the remaining solids adhere to the evaporation device; the cleaning device cleans the evaporation device regularly or as needed; the automatic control device automatically adjusts the flow rate of the submersible pump and the evaporation efficiency of the evaporation device according to the environmental temperature and humidity, wind speed, and evaporation rate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The evaporation device of the present invention utilizes wind energy to accelerate the evaporation of desulfurized wastewater, significantly improving the evaporation efficiency and reducing energy consumption; the cleaning device regularly removes solid residues on the evaporation device to prevent fouling and blockage, ensuring long-term stable operation; the automatic control device real-time monitors environmental parameters (temperature, humidity, wind speed) and evaporation rate, and dynamically adjusts the flow rate of the submersible pump and the evaporation intensity of the evaporation device; the device of the present invention has the advantages of energy conservation, environmental protection, automatic control and low maintenance cost, effectively solving the problems of low efficiency, fouling and manual dependence in the evaporation treatment of desulfurized wastewater.

[0018] Furthermore, guide wheels are provided at the bottom of the non-metallic support frame, and the inclination angle of the drying module can be adjusted through the guide wheels. The adjustment of the inclination angle enables the wastewater droplets on the evaporation carrier to form a thinner liquid film under the action of gravity, further increasing the contact area between the droplets and the air and improving the evaporation rate. In addition, by changing the relative angle between the drying module and the wind field, the distribution of the wind field on the surface of the drying module is optimized. When the drying module faces the wind at the optimal inclination angle, the wind can blow more evenly onto the surface of the evaporation carrier, accelerating the evaporation process of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a wind energy enhanced evaporation device for desulfurized wastewater of the present invention.

[0021] Wherein: 1. Evaporation device; 2. Cleaning device; 3. Submersible pump; 4. Automatic control device; 5. Evaporation pond. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0024] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0025] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, 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 thus should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0027] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings: The first object of the present invention is to provide a desulfurized wastewater wind energy enhanced evaporation device, as Figure 1As shown, it includes an evaporation device 1; the outlet of the evaporation device 1 is connected to the inlet of the evaporation pond 5; the first inlet of the evaporation device 1 is connected to the outlet of the evaporation pond 5 through a submersible pump 3; the second inlet of the evaporation device 1 is connected to the outlet of the cleaning device 2; both the submersible pump 3 and the cleaning device 2 are electrically connected to the automatic control device 4. The evaporation device 1 of the present invention utilizes wind energy to accelerate the evaporation of desulfurized wastewater, significantly improving the evaporation efficiency and reducing energy consumption; the submersible pump 3 ensures the continuous supply of wastewater and maintains a continuous evaporation process; the cleaning device 2 regularly removes the solid residues on the evaporation device 1 to prevent fouling and blockage and ensure long-term stable operation; the automatic control device 4 dynamically adjusts the flow rate of the submersible pump 3 and the evaporation intensity of the evaporation device 1 by real-time monitoring of environmental parameters (temperature, humidity, wind speed) and evaporation rate, not only adapting to environmental changes to optimize energy efficiency but also avoiding waste of resources. The evaporation pond 5 collects the waste liquid and desulfurized wastewater processed by the evaporation device 1, realizing the circular treatment of wastewater and the intensive utilization of resources. The device of the present invention has the advantages of energy conservation, environmental protection, automatic control and low maintenance cost, effectively solving the problems of low efficiency, fouling and manual dependence in the evaporation treatment of desulfurized wastewater.

[0029] A spray module and a drying module are arranged in the evaporation device 1; the spray module is used to spray desulfurized wastewater onto the drying module, and the drying module includes a non-metallic support frame; an evaporation carrier is arranged inside the non-metallic support frame. The spray module atomizes the desulfurized wastewater into tiny droplets, greatly increasing its contact area with air and accelerating water evaporation; the drying module combines a non-metallic support frame and an evaporation carrier, using natural wind or an auxiliary fan to accelerate evaporation. The drying module is both corrosion-resistant and provides a high specific surface area, enabling the atomized wastewater to be evenly distributed and quickly air-dried, while the evaporation carrier can intercept solid pollutants.

[0030] The non-metallic support frame is made of fiberglass-reinforced plastic (FRP) or polypropylene (PP), with both high strength and corrosion resistance, having excellent corrosion resistance while ensuring structural strength. And guide wheels are arranged at the bottom of the non-metallic support frame. The guide wheels are installed at the bottom of the non-metallic support frame, and the tilt angle (15° - 30°) of the drying module can be adjusted manually or electrically to optimize the wind field distribution and improve the evaporation efficiency. Specifically, the adjustment of the tilt angle enables the wastewater droplets on the evaporation carrier to form a thinner liquid film under the action of gravity, further increasing the contact area between the droplets and air and improving the evaporation rate. At the same time, when the drying module faces the wind at the optimal tilt angle, the wind can blow more evenly onto the surface of the evaporation carrier, accelerating the evaporation process of water and optimizing the distribution of the wind field on the surface of the drying module.

[0031] One or more of nylon, polycarbonate, polyester, polypropylene, polyethylene, and polyvinyl chloride are selected as the base material (3 mm to 5 mm) of the evaporation carrier, giving full play to the excellent capillary action and corrosion resistance of the above materials, enabling the desulfurized wastewater to quickly spread on the carrier surface and form a uniform water film, and greatly increasing the evaporation area.

[0032] The cleaning device 2 includes a flushing pump, a chemical dosing water tank, valves, and a power control box; the outlet of the chemical dosing water tank is connected to the inlet of the flushing pump through a corrosion-resistant pipeline (such as PVC or 316L stainless steel). A chemical dosing port (for injecting cleaning chemicals) is provided at the top of the chemical dosing water tank, and a drain valve (for regularly emptying the residual liquid) is provided at the bottom. The outlet of the flushing pump is connected to the valve group through a high-pressure pipeline, and multiple branch pipelines are provided at the outlet of the flushing pump. An electromagnetic valve / pneumatic valve (such as a DN50 ball valve) is installed on each branch pipe, corresponding to different cleaning areas (such as heat exchange tubes, spray trays, water collection tanks, etc.) of the evaporation device 1. Moreover, the flushing pump and the valves are electrically connected to the power control box. The power control box is connected to the flushing pump and the valves through cables, integrates the signal inputs of sensors (such as pressure gauges, flow meters), and has a built-in human-machine interface (HMI) or physical buttons to support manual / automatic mode switching.

[0033] The power control box is electrically connected to the automatic control device 4. The automatic control device 4 comprehensively considers the evaporation load, the data of the scaling sensor, and the historical operation records, and automatically adjusts the opening and closing sequence of the flushing pump and the sectional valves through the power control box to achieve intelligent and precise control of the cleaning process.

[0034] A frequency converter is provided on the motor of the submersible pump 3, and the frequency converter is electrically connected to the automatic control device 4, and the pumping flow can be dynamically adjusted by controlling the frequency converter according to the real-time monitoring data of the automatic control device 4.

[0035] A power supply incoming line circuit breaker and a relay connected thereto are provided in the automatic control device 4. When it is detected that the submersible pump 3 is overloaded, the pressure of the flushing pump is abnormal, or the signal of the valve group is lost, the automatic control device 4 immediately triggers shutdown protection and gives an audible and visual alarm, and the power supply incoming line circuit breaker automatically cuts off the faulty circuit to prevent equipment damage.

[0036] In summary, the evaporation device 1 of the present invention atomizes the desulfurized wastewater into micron-sized droplets through the spray module and evenly sprays them onto the surface of the evaporation carrier of the drying module. Combining natural wind power or an auxiliary fan to enhance evaporation, the water is efficiently evaporated while the solid pollutants are retained on the carrier. The drying module uses a corrosion-resistant non-metallic support frame and a substrate with capillary action (such as nylon, polypropylene), and adjusts the inclination angle of the module through a guide wheel mechanism to optimize the wind field distribution, thereby significantly improving the evaporation efficiency. The automatic control device 4 monitors the environmental parameters in real time and intelligently adjusts the flow rate of the submersible pump, the spraying frequency, and the cleaning cycle to achieve dynamic matching of the operating parameters and the environmental conditions. The cleaning device 2 adopts a high-pressure sub-region flushing mode to effectively dissolve the scale on the surface of the carrier and ensure the continuous and stable operation of the system. Through the synergistic effect of structural optimization and intelligent control, the device of the present invention realizes the high-efficiency, automation, and long-term stable operation of desulfurized wastewater treatment.

[0037] The second object of the present invention is to provide a method for enhancing the evaporation of desulfurized wastewater by wind energy, comprising the following steps: The submersible pump 3 transports the desulfurized wastewater in the evaporation tank 5 to the evaporation device 1; the evaporation device 1 evaporates the desulfurized wastewater, and the remaining solids adhere to the evaporation device 1; the cleaning device 2 cleans the evaporation device 1 regularly or as needed; the automatic control device 4 automatically adjusts the flow rate of the submersible pump 3 and the evaporation efficiency of the evaporation device 1 according to the environmental temperature and humidity, wind speed, and evaporation rate. Through the synergistic effect of the accurate wastewater transportation by the submersible pump 3, the efficient evaporation of the evaporation device 1, the regular maintenance of the cleaning device 2, and the intelligent control of the automatic control device 4, the method of the present invention not only realizes the efficient evaporation of desulfurized wastewater and the resource recovery of solid residues, but also the wind energy enhancement technology breaks through the dependence of traditional evaporation processes on natural conditions, greatly improving the evaporation rate and treatment scale. And the automatic control device 4 effectively solves the problem that the evaporation efficiency is affected by environmental fluctuations, ensuring the stable operation of the device under complex working conditions, thereby reducing energy consumption and floor area while realizing the continuity and automation of wastewater treatment, providing an innovative technical solution for the field of high-salt wastewater treatment.

[0038] Embodiment A method for enhancing the evaporation of desulfurized wastewater by wind energy, the specific steps are as follows: Step 1: System initialization and pre-inspection Device status confirmation: Check the liquid level and composition (such as pH value, solid content) of the desulfurized wastewater in the evaporation tank 5 to ensure that the wastewater meets the requirements for evaporation treatment.

[0039] View the operating status of the submersible pump (3), flushing pump, valve group, and sensors through the human-machine interface (HMI) of the automatic control device 4 to confirm that there is no fault alarm.

[0040] Verify the amount of cleaning agent in the dispensing water tank of cleaning device 2 and that the drain valve is in the closed state.

[0041] Step 2: Start the evaporation process Submersible pump operation: The automatic control device 4 adjusts the rotation speed of the submersible pump 3 through the frequency converter, and transports the desulfurization wastewater in the evaporation pool 5 to the evaporation device 1 through the first inlet.

[0042] The output power of the submersible pump 3 is set according to the wastewater flow demand, and the pipeline pressure is monitored in real time through a pressure sensor.

[0043] Spraying and drying: The spray module of the evaporation device 1 is started to atomize the desulfurization wastewater into droplets with a particle size of 50-100 μm, and evenly spray them onto the surface of the evaporation carrier of the drying module.

[0044] The drying module uses a wind energy enhancement system (such as natural wind or auxiliary fans) to accelerate the evaporation of water on the surface of the evaporation carrier, and the precipitated solid pollutants adhere to the carrier.

[0045] Step 3: Wind Energy Enhancement and Evaporation Control Drying module operation: The evaporation carrier in the non-metallic support frame diffuses the wastewater through capillary action, thereby increasing the evaporation area.

[0046] The inclination angle of the drying module is adjusted by the guide wheel to optimize the wind field distribution and improve the evaporation efficiency.

[0047] Dynamic parameter adjustment: The automatic control device 4 automatically adjusts the flow rate of the submersible pump 3 and the spraying frequency of the spray module according to the ambient temperature and humidity, wind speed and evaporation rate (achieved by controlling the flow rate of the flushing pump and the closing degree of the valve).

[0048] Step 4: Cleaning device linkage operation Timed / triggered cleaning: When the pressure difference of the evaporation device 1 exceeds a set threshold value (eg, ΔP>10 kPa) or reaches a preset cleaning cycle (eg, every 72 hours), the automatic control device 4 starts a cleaning program.

[0049] The dispensing water tank of the cleaning device 2 is injected with cleaning agent (such as 5% citric acid solution) in proportion, the flushing pump is pressurized to 0.5~1.0MPa, and the valve is opened accordingly according to on-site requirements.

[0050] Cleaning by area: The cleaning fluid is pumped through the drying module surface, spray plate, and sump, dissolving scale and flushing out residual solids. The nozzle spray angle and cleaning fluid flow rate are adjusted according to the actual degree of fouling.

[0051] Step 5: Waste liquid recovery and system reset Waste liquid treatment: After the cleaning is completed, the cleaning waste liquid is switched to the sewage pipeline through the valve group and discharged into the neutralization tank, or is recycled to the chemical dosing water tank after filtration; the waste liquid generated by the evaporation device 1 is collected in the evaporation tank 5.

[0052] Open the outlet sewage valve of the evaporation tank 5 and regularly clean the sediment (such as once a week).

[0053] System restoration: The automatic control device 4 switches to the standby mode and records the operation data of this time (such as evaporation volume, energy consumption, cleaning duration).

[0054] Check the integrity of the evaporation carrier of the drying module, and perform manual maintenance by moving the non-metallic support frame through the guide wheels if necessary.

[0055] Step 6: Fault protection and shutdown Abnormal handling: If it is detected that the submersible pump 3 is overloaded, the pressure of the flushing pump is abnormal, or the signal of the valve group is lost, the automatic control device 4 immediately triggers shutdown protection, emits an audible and visual alarm, and the power inlet circuit breaker automatically cuts off the faulty circuit to prevent equipment damage.

[0056] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A desulfurized wastewater wind energy enhanced evaporation device, characterized in that, It includes an evaporation device (1); the outlet of the evaporation device (1) is connected to the inlet of the evaporation pond (5); the first inlet of the evaporation device (1) is connected to the outlet of the evaporation pond (5) through a submersible pump (3); the second inlet of the evaporation device (1) is connected to the outlet of the cleaning device (2); both the submersible pump (3) and the cleaning device (2) are electrically connected to the automatic control device (4).

2. The desulfurized wastewater wind energy enhanced evaporation device according to claim 1, wherein, A spray module and a drying module are arranged in the evaporation device (1); the spray module is used to spray the desulfurized wastewater onto the drying module.

3. The wind energy enhanced evaporation device for desulfurized wastewater according to claim 2, wherein The drying module includes a non-metallic support frame; an evaporation carrier is arranged inside the non-metallic support frame.

4. A desulfurized wastewater wind energy enhanced evaporation device according to claim 3, characterized in that, Guide wheels are arranged at the bottom of the non-metallic support frame.

5. A desulfurized wastewater wind energy enhanced evaporation device according to claim 3, characterized in that, The base material of the evaporation carrier includes one or more of nylon, polycarbonate, polyester, polypropylene, polyethylene, and polyvinyl chloride.

6. The desulfurized wastewater wind energy enhanced evaporation device according to claim 1, characterized in that, The cleaning device (2) includes a flushing pump, a chemical dosing water tank, a valve, and a power control box; the outlet of the chemical dosing water tank is connected to the inlet of the flushing pump; a valve is arranged at the outlet of the flushing pump; both the flushing pump and the valve are electrically connected to the power control box; the power control box is electrically connected to the automatic control device (4).

7. A desulfurized wastewater wind energy enhanced evaporation device according to claim 6, characterized in that, Multiple branch pipes are arranged at the outlet of the flushing pump.

8. A desulfurized wastewater wind energy enhanced evaporation device according to claim 1, characterized in that, A frequency converter is arranged on the submersible pump (3); the frequency converter is electrically connected to the automatic control device (4).

9. The desulfurized wastewater wind energy enhanced evaporation device according to claim 1, wherein, A power inlet circuit breaker and a relay connected thereto are arranged inside the automatic control device (4).

10. A method for enhancing the evaporation of desulfurized wastewater by wind energy, characterized in that, Using the device according to any one of claims 1 to 9, it includes the following steps: The submersible pump (3) transports the desulfurized wastewater in the evaporation pond (5) to the evaporation device (1); the evaporation device (1) evaporates the desulfurized wastewater, and the remaining solids adhere to the evaporation device (1); the cleaning device (2) cleans the evaporation device (1) regularly or as needed; the automatic control device (4) automatically adjusts the flow rate of the submersible pump (3) and the evaporation efficiency of the evaporation device (1) according to the environmental temperature and humidity, wind speed, and evaporation rate.

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