Wastewater zero discharge spray evaporation method based on mountain top geographical advantage

Abstract

The application discloses a kind of based on mountain top geographical advantage sewage zero discharge spray evaporation method, belong to sewage advanced treatment and ultimate disposal technical field.The system will be wholely set in mountain top, ridge or other altitude significantly higher than the geographical position of pre-treatment unit and sensitive area.Spray evaporation field system includes with low-position clear water source connection high-pressure water supply system, atomizing nozzle array arranged in mountain top and intelligent control system.The method makes full use of the natural advantages of mountain top perennial wind, atmospheric diffusion condition is good, pre-treatment standard clear water is sprayed to high altitude by high-pressure atomization, realizes quick evaporation and zero liquid discharge.The core invention point is: by geographical high-position arrangement, natural ventilation evaporation efficiency is greatly strengthened, and mechanical ventilation energy consumption can be basically or completely saved;Utilize topographic relief to form natural environmental isolation zone, minimize the visual and odor impact of spray process on surrounding environment;And can realize intensive layout with the same built in mountain top biological treatment unit (such as three-dimensional natural ventilation biological membrane array tower) and potential energy sharing, build complete low-energy consumption mountainous area sewage zero discharge treatment system.

Description

Technical Field

[0001] This invention relates to the field of environmental protection and wastewater treatment, specifically to a wastewater terminal zero-liquid discharge treatment system and process that utilizes specific terrain and meteorological conditions to achieve high efficiency and low environmental impact. Background Technology

[0002] In regions or industries with stringent zero-emission requirements, spray evaporation is a viable final wastewater treatment technology. Existing technologies typically place evaporation sites on flat ground within the plant area. To overcome airflow limitations and accelerate evaporation, high-powered fans are often required for forced ventilation, resulting in high energy consumption. Furthermore, the slight visual impact of the water mist or potential odors generated by the spray can easily raise environmental concerns in densely populated areas. In addition, the energy consumption of pumping high-pressure water from flat ground sources cannot be ignored. Therefore, the current challenge for promoting spray evaporation technology is how to systematically reduce operating energy consumption, improve environmental friendliness, and expand the applicable scenarios while ensuring zero-emission effects. Summary of the Invention

[0003] (a) Purpose of the invention The purpose of this invention is to provide a wastewater zero-discharge spray evaporation system and method that can synergistically utilize the geographical advantages of mountains and the excellent meteorological conditions at the top of the mountain, significantly reduce operating energy consumption and environmental impact, and can be efficiently coupled with a pre-treatment biochemical system.

[0004] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A zero-discharge spray evaporation method for wastewater based on the geographical advantages of mountain tops includes a geographically coupled layout module, a high-pressure water supply system, a natural ventilation spray evaporation field, and an intelligent control system.

[0005] 1. Geographically Coupled Layout Module: The core innovation lies in site selection for the entire spray evaporation field on mountaintops, ridges, or other locations significantly higher than the surrounding environment (especially higher than major residential or production activity areas). This location, together with the pre-treatment wastewater unit (such as a biochemical treatment system or clear water storage tank) located at a lower elevation, forms a geographically and hydraulically coupled relationship of "low-level treatment and high-level evaporation".

[0006] 2. High-pressure water supply system: This includes a booster pump set and a high-pressure plunger pump set. The booster pump is responsible for transporting water from the low-level clear water tank to the high-level water tank at the top of the mountain or directly into the high-pressure pump inlet. The high-pressure plunger pump pressurizes the water to the working pressure required for atomization (usually 2-10 MPa). Piping must be designed with freeze protection, corrosion protection, and pressure loss control in mind.

[0007] 3. Natural Ventilation Spray Evaporation Field: This is the core reaction zone of the system, located at the mountaintop. It consists of an array of steel or concrete supports, a distributed pipe network, and numerous specialized anti-clogging atomizing nozzles (such as pressure-type rotary atomizing nozzles). The core design principle of this site is to utilize the consistently high average wind speed and strong turbulent diffusion conditions at the mountaintop as the primary driving force for evaporation, thereby eliminating or greatly simplifying mechanical ventilation systems.

[0008] 4. Intelligent Control System: Based on data from weather stations (monitoring wind speed, wind direction, temperature, and humidity) and flow meters, the system dynamically adjusts the operating pressure of the high-pressure pump and the opening and closing of solenoid valves in each zone's branch pipes via a PLC or IoT controller to achieve zoned and timed spraying. For example, the spray intensity is increased when the wind speed is high and the humidity is low; the spray intensity is reduced or shut off in areas with calm winds or when a specific wind direction may affect downwind sensitive targets.

[0009] (III) Beneficial Effects 1. Revolutionary reduction in energy consumption: Directly utilizing free and powerful natural wind from the mountaintop replaces high-energy-consuming mechanical fans, eliminating the most energy-intensive unit in spray evaporation. Although there is energy consumption for lifting water to the mountaintop, under zero-emission constraints, this energy consumption is often lower than the cost of treating water to higher reuse standards or constructing long-distance discharge pipelines, making it economically viable overall. If constructed in conjunction with a pre-treatment biological unit (such as a three-dimensional biofilm array tower system) also built on the mountaintop, the water lifting path can be shared, further optimizing energy consumption.

[0010] 2. Minimize environmental disturbance: The high-altitude location on the mountaintop itself forms a natural physical and visual barrier from public areas. Combined with the surrounding greenbelts, this effectively absorbs and blocks any trace amounts of odor and minimizes the visual impact of water mist. The superior diffusion conditions at high altitudes also prevent droplets from accumulating near the ground and forming localized high-humidity areas.

[0011] 3. Strong system integration and scalability: It can be seamlessly integrated with main treatment processes such as the "mountaintop three-dimensional natural ventilation biofilm array tower" to form a complete, compact, low-energy, zero-emission solution of "pretreatment-mountain biochemical treatment-mountain evaporation". The treatment scale can be flexibly adjusted by linearly increasing the area of ​​the mountaintop evaporation field and the number of nozzles to meet different needs from several tons to hundreds of thousands of tons per day.

[0012] 4. High reliability and easy maintenance: The main body of the system consists of mechanical pumping and spraying equipment, ensuring high reliability. Intelligent control strategies can adapt to complex weather changes, guaranteeing stable operation. Anti-clogging nozzle design reduces maintenance frequency. Attached Figure Description

[0013] Figure 1 This is a top view of the planar layout of the system of the present invention (array surrounding type, pond surface superposition type). Figure 2 Front view (array surround, pond surface overlay). Figure 3 This is a left-side side view (array-surround, pond-surface overlay). Figure 4 This is a combination diagram of array surround and pond surface superposition. Figure 5 This is a three-dimensional view of an array-surrounded outer shell. Figure 6 This is a detailed drawing of the core components of the biofilm array tower. Figure 7 Photo 1 shows the use of natural evaporation in mountain forest belts. Figure 8 Photo 2 shows the natural evaporation of mountain forest belts. Detailed Implementation

[0014] Zero-discharge system for wastewater from mountain aquaculture coupled with a three-dimensional biofilm array tower This embodiment provides a complete zero-discharge solution for wastewater from mountain aquaculture, the core of which is an integrated structure consisting of the multi-pond coupled three-dimensional natural ventilation biofilm array tower (as a biochemical treatment unit) and the spray evaporation system based on the geographical advantages of the mountaintop (as a terminal treatment unit) described in this invention.

[0015] 1. System Overall Layout and Process Flow Site selection: The entire system is built on a mountaintop platform with a relative altitude of about 50 meters. Process: Livestock farm wastewater → screen, sedimentation, solid-liquid separation, anaerobic fermentation in biogas digester (pretreatment area at the foot of the mountain) → pumped to the top of the mountain → enters the three-dimensional biofilm array tower system for efficient biochemical treatment (COD removal >94%) → biochemical effluent enters the clear water storage tank at the top of the mountain → atomized and evaporated by the high-pressure spray evaporation system of this invention → zero liquid discharge. Geographical coupling: The biochemical treatment units (biotower and oxidation pond) and the spray evaporation field are intensively arranged on the mountaintop platform, sharing the geographical advantage of high position, and the end oxidation pond can directly serve as the connection and buffer between the two.

[0016] 2. Design parameters of the spray evaporation subsystem Treatment target: Clean water that has undergone biochemical treatment and meets the standards, with COD < 150 mg / L and SS < 20 mg / L. Design capacity: 100 m³ / d (designed to reduce the volume of effluent from the biological system to 150 m³ / d by 2 / 3, with the remainder considered for reuse or other resource recovery methods).

[0017] High-pressure water supply system: Water source: Clear water storage tank on the mountaintop (effective volume 100 m³).

[0018] Booster Pump: The clear water tank supplies water to the high-pressure pump by gravity flow, requiring no additional boosting.

[0019] High-pressure pump: plunger pump, working pressure 4 MPa, flow rate 6 m³ / h.

[0020] Natural ventilation mist evaporation field: Site dimensions: 36m long × 30m wide.

[0021] Nozzle type: Stainless steel anti-clogging rotary pressure atomizing nozzle.

[0022] Number of nozzles: 200, divided into 4 independent control zones.

[0023] Installation height: 1.5-3 meters from the ground.

[0024] No mechanical fans were installed.

[0025] Intelligent control system: Automatically controls the start and stop of four spray zones based on data from the on-site weather station. Start-up conditions: wind speed > 1.5 m / s and relative humidity < 80%. Downwind zones are prioritized for activation.

[0026] 3. Operational Effectiveness and Economic Analysis Evaporation efficiency: Under the condition of an average annual wind speed of 3.5 m / s at the top of a mountain, the measured evaporation efficiency can reach 3-5 L / (m²·h). The evaporation demand of 100 m³ / d can be easily achieved within the designed 1000 m² evaporation field, with an actual daily operating time of approximately 15-20 hours (adjusted according to weather).

[0027] Energy consumption analysis: Core energy-consuming unit: high-pressure plunger pump (power approximately 10 kW).

[0028] Electricity consumption per ton of water evaporation (spraying only): (10 kW × 18 h) / 100 m³ = 1.8 kWh / m³. If we calculate the total energy consumption from the pretreatment at the foot of the mountain to the top (including biochemical treatment), the comprehensive electricity consumption per ton of water is approximately 1.2 kWh / m³.

[0029] Compared to traditional mechanical ventilation spray evaporation on flat ground: traditional solutions typically consume over 10 kWh / m³ of electricity per ton of water (with fan energy accounting for over 50%). This invention saves approximately 70-90% of energy.

[0030] Environmental friendliness: During operation, there was no noticeable visual water mist or odor in the factory area at the foot of the mountain and the surrounding villages, and there were zero environmental complaints.

[0031] Economic efficiency: The total investment (including biochemical and evaporation) is more than 80% lower than the traditional "biochemical + reverse osmosis + mechanical spray" zero-emission solution, and the operating cost is reduced by more than 90%.

[0032] in conclusion This embodiment verifies the superior performance of the system of the present invention integrated with a high-efficiency pre-treatment biochemical unit in mountainous environments. By creatively utilizing the geographical advantages of mountaintops, the present invention not only achieves the ultimate goal of zero liquid wastewater discharge, but also makes breakthroughs in two key bottlenecks: energy consumption and environmental acceptability. This system is particularly suitable for zero-discharge treatment of decentralized pollution sources with natural elevation differences in hilly and mountainous areas, as well as zero-discharge industrial wastewater projects in areas with scarce land resources and environmental sensitivity, demonstrating significant technological advancement and application value.

Claims

1. A zero-discharge spray evaporation method for wastewater based on the geographical advantages of mountaintops, characterized in that, include: The geographic coupling layout module sets up the entire spray evaporation field on a mountaintop, ridge, or high platform; A high-pressure water supply system is used to lift and pressurize treated clean water located at a lower altitude and deliver it to the spray evaporation field; The natural ventilation spray evaporation field is located at a high position determined by the geographic coupling layout module. It mainly consists of an array of anti-clogging atomizing nozzles installed on the support structure and relies on the natural wind force at the mountain top as the driving force for evaporation. The intelligent control system is used to dynamically adjust the spray operation parameters based on meteorological monitoring data and water inlet parameters.

2. The system according to claim 1, characterized in that, The natural ventilation spray evaporation field is not equipped with high-power mechanical ventilation equipment, or is only equipped with low-power ventilation equipment for use in extreme calm weather.

3. The system according to claim 1 or 2, characterized in that, The area surrounding the spray evaporation field is protected by a green isolation belt with natural vegetation or artificial planting.

4. The system according to claim 1, characterized in that, The high-pressure water supply system pressurizes clean water to 2-10 MPa and delivers it to the atomizing nozzle array at the top of the mountain through a pipeline network.

5. The system according to claim 1, characterized in that, The spray evaporation field is geographically coupled with one or more biofilm wastewater treatment units built on the mountaintop to form an intensively arranged mountaintop treatment area, and may optionally share some water lifting facilities and elevated water tanks.

6. The system according to claim 1, characterized in that, The intelligent control system controls the start and stop of the high-pressure pump and its frequency, as well as the opening and closing combinations of different zone nozzle arrays, based on wind speed, wind direction, temperature, humidity, and water inflow, in order to optimize evaporation efficiency and prevent droplets from drifting to non-target areas.

7. A method for zero-discharge wastewater treatment using the system described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Store the pre-treated clean water that meets the standards in a low-level clean water tank; S2. The clean water is lifted and pressurized to a set pressure through a high-pressure water supply system and transported to the spray evaporation field at the top of the mountain; S3. The intelligent control system adjusts the spray pressure and controls the activation of the nozzle array in specific areas based on real-time meteorological data from the mountaintop; S4. Clean water is atomized into fine droplets through atomizing nozzles and sprayed into the high air. Under the action of strong natural winds at the mountaintop, it quickly diffuses and evaporates, achieving zero liquid discharge. S5. Trace amounts of crystals produced during the evaporation process shall be collected and disposed of periodically.

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