New innovation wildfire suppression equipment

 Wildfires are a major global problem, causing significant damage to the environment, economy, and human communities. They are often exacerbated by weather conditions such as drought and strong winds , the difficulty of accessing water sources for firefighting, and rough terrain. A recent example is the devastating wildfires near Los Angeles, California, where wind gusts of over 100 km/h contributed to the rapid spread of the flames, leading to the evacuation of tens of thousands of people and threatening the homes of several celebrities . These fires caused the deaths of at least 10 people, destroyed or damaged over 10,000 homes and buildings, generating considerable material losses . In this context, the development of new technologies and wildfire suppression equipment is essential to effectively combat this phenomenon.   

This article analyzes a new concept of wildfire suppression equipment that uses an innovative approach based on soil milling and the creation of a dust curtain. We will explore the operating principles of this equipment, its advantages and disadvantages, as well as possible improvements and applications in various contexts.

Background: Wildfires

Wildfires are complex events, influenced by a variety of factors, including:

  • Climate: High temperatures, prolonged drought, and strong winds contribute to the drying of vegetation and increase the risk of fire . Climate change, rising temperatures, and drought risks could increase the number of forests or agricultural land affected by fires . 
  • Vegetation: The type and density of vegetation influence the intensity and speed of fire spread .  
  • Terrain: Steep slopes and rough terrain can accelerate the spread of fires.
  • Human activity: Negligence, arson, and uncontrolled human activities are common causes of wildfires . Over nine out of 10 fires in the EU are caused by human actions .  

Wildfires have a devastating impact on the environment, including:

  • Destruction of natural habitats: Loss of biodiversity and damage to ecosystems. Approximately 25% of the areas burned in Europe were within "Natura 2000" sites, natural areas protected at the European level .  
  • Soil erosion: Increased risk of landslides and soil quality degradation.
  • Air pollution: Greenhouse gas emissions and fine particles that affect human health .  

A concrete example of the impact of wildfires is the situation in Los Angeles, where, in addition to the loss of human life and material damage, residents also face smoke-polluted air and the danger of contaminated water . The fires in Los Angeles have also revealed vulnerabilities in the water supply system, which was not designed to cope with fires of this magnitude . Firefighters faced low water pressure or even lack of water in hydrants, which hampered firefighting efforts . In addition, the Emergency Inspectorate plays a crucial role in managing emergency situations caused by wildfires, given their frequency and the extent of their effects .  

In the Los Angeles area, at least five major fires occurred in 2023: Palisades, Elena, Hurst, Lidia, and Sunset . The Palisades fire, the largest in the region, burned a considerable area of land, including Pacific Palisades . The Elena fire affected the northern part of Los Angeles, and the Hurst fire spread rapidly in the San Fernando area . The speed of these fires varied, reaching 2-3 kilometers per hour in the case of the Mojave Desert fire .   

Equipment Description

The proposed equipment is a milling machine specially designed to intervene in areas affected by wildfires. Its operating principle consists of:

  1. Milling the soil and ash: The equipment mills the burnt soil and the ash resulting from the fire, turning them into a fine powder.
  2. Creating a dust curtain: The fine powder is ejected forcefully into the air, forming a dense curtain that is carried by the wind towards the fire.
  3. Suffocating the flames: The dust curtain acts as an extinguishing agent, isolating the flames from oxygen and reducing the intensity of the fire.

To facilitate understanding of the equipment's operation, we provide a detailed description of its main components:

  • Milling system: This consists of a robust milling machine with teeth made of wear-resistant and high-temperature resistant material, driven by a powerful engine. The shape and size of the teeth are optimized to maximize milling efficiency, and the rotation speed can be adjusted depending on the soil type and working conditions.
  • Ejection system: This is responsible for forcefully projecting the fine dust into the air to create a dense curtain. The system includes a powerful turbine or fan, which generates an airflow directed towards the fire. The ejection force can be adjusted to ensure optimal dust dispersion depending on wind speed and direction.
  • Travel system: The equipment is mounted on a robust chassis with tracks or wheels, allowing it to move on rough terrain. The travel system is designed to ensure the stability and maneuverability of the equipment in difficult conditions.
  • Control system: This includes a user interface that allows the operator to control the operation of the equipment. The control system can be automated, using sensors to monitor environmental conditions and adjust operating parameters in real time.
Equipment Analysis

Advantages and Disadvantages of Using the Equipment

One of the major advantages of this equipment is that it does not require water to operate, which makes it particularly useful in areas with limited access to water sources, such as those affected by the fires in Los Angeles, where firefighters faced problems with low water pressure or even lack of water in hydrants .  

AdvantageDisadvantage
Use of local resources (soil, ash)Efficiency dependent on weather conditions (wind)
Does not require waterPossible rapid dispersion of the dust curtain
Potential to create a barrier against fire spreadRisk of soil erosion in the long term
Reduced CO2 emissions compared to other methodsNeed for a power source for operation
Potential to reduce the risk of water contamination
Efficiency of Soil and Ash Milling

Milling efficiency depends on several factors, including:

  • Soil type: Clayey or sandy soils may be easier to mill than rocky ones.
  • Soil moisture: Dry soil will be easier to turn into fine dust.
  • Milling machine design: A milling machine with resistant teeth and an optimal rotation speed will ensure efficient milling.
Ability to Create a Dust Curtain

The density of the dust curtain is crucial for the efficiency of the equipment. This depends on:

  • Fineness of the dust: Finer dust will create a denser and more persistent curtain.
  • Ejection force: A powerful ejection will ensure better dust dispersion.
  • Weather conditions: Wind can help propagate the dust curtain, but strong wind can disperse it too quickly .  
Influence of Wind

Wind plays an important role in the operation of the equipment. It can:

  • Advantages:
    • Facilitate the propagation of the dust curtain towards the fire.
    • Contribute to cooling the burned area.
  • Disadvantages:
    • Disperse the dust curtain too quickly, reducing efficiency.
    • Change the direction of the fire, endangering intervention teams .  

The efficiency of the equipment can be influenced by wind speed and direction, as well as the type of vegetation fueling the fire . For example, a strong wind can quickly disperse the dust curtain, while a weak wind may not be enough to carry it to the fire. Also, dense vegetation can create turbulence that affects dust dispersion. If there is no wind, the dust column can be directed onto the fire.   

Physical Properties of Fire-Generated Plasma

Plasma is a state of matter made up of electrically charged particles. In the case of fires, plasma is formed due to high temperatures that ionize gases in the air. This influences the spread of fires through:

  • Heat transfer: Plasma transfers heat quickly to the fuel, accelerating combustion.
  • Chemical reactions: Plasma can initiate and accelerate the chemical reactions involved in combustion.

Understanding the properties of fire-generated plasma can contribute to optimizing the design and operation of extinguishing equipment, such as the dust curtain milling machine.

Simulation of the Effect of Dust on the Flame

To assess the effectiveness of the equipment, a simulation of the effect of dust on the flame is required. This can be achieved through:

  • Computer modeling: Using specialized software to simulate fire propagation and its interaction with the dust curtain. Parameters such as dust density and composition, wind speed and direction, vegetation type, etc. can be varied to assess the effectiveness of the equipment in various scenarios.
  • Controlled experiments: Conducting laboratory or field experiments under controlled conditions to observe the effect of dust on the flame. Various types of dust, with different compositions and particle sizes, can be used to determine which is most effective in extinguishing fires.

Simulations and experiments should also consider the effect of CO2 contained in the ash on the flame. CO2 is an inert gas that can contribute to reducing fire intensity by replacing oxygen in the air.

Similar Patents

A search on Google Patents revealed a few similar patents that use soil or other materials for fire suppression:

  • RU2496540C1: This patent describes a machine that throws soil towards the fire to extinguish vegetation fires and create mineralized protection strips.
  • US3211237A: This patent describes a machine for cutting and shredding vegetation, which can also be used to create a barrier against the spread of fires.

These patents demonstrate that there is an interest in developing machines that use soil or other materials for fire suppression. The equipment proposed in this article differs in that it uses a milling machine to grind soil and ash into a fine powder, which is then forcefully ejected into the air to create a dense curtain.

Possible Equipment Improvements
  • Optimizing the milling machine design:
    • Using more wear-resistant and high-temperature resistant materials, such as those used in the aerospace industry or in the construction of racing cars .  
    • Adjusting the shape and size of the teeth to maximize milling efficiency depending on the soil type.
  • Integrating sensors:
    • Sensors for monitoring temperature, humidity, and wind speed, which can provide real-time information about environmental conditions and help adjust the operating parameters of the equipment.
    • Sensors for detecting the direction and intensity of the fire, which can guide the equipment to critical areas and optimize the dispersion of the dust curtain.
  • Automatic control system:
    • Automatic adjustment of milling speed and ejection force depending on environmental conditions, to maximize equipment efficiency and reduce the risk of soil erosion.
Comparison with Other Firefighting Equipment
EquipmentAdvantagesDisadvantages
Fire trucks with waterWide availability, efficiency in extinguishing small firesNeed for a water source, limited accessibility in rough terrain
Firefighting aircraftLarge coverage capacity, efficiency in extinguishing large firesHigh costs, dependence on weather conditions
Dust curtain milling machineUse of local resources, independence from water sources, potential to reduce the risk of water contaminationEfficiency dependent on weather conditions, risk of soil erosion
Possible Applications of the Equipment
  • Extinguishing industrial fires: In areas at risk of fires in flammable material warehouses or factories, where access to water sources may be limited or where there is a risk of water contamination.
  • Extinguishing dry vegetation fires: In areas with dry vegetation, such as steppes or savannas, where water is a precious resource and where fires can spread rapidly.
Environmental Impact

The use of this equipment can have an impact on the environment, including:

  • CO2 emissions: The equipment will generate CO2 emissions due to fuel consumption. It is important to use high-efficiency engines and alternative fuels to minimize these emissions.
  • Fine particle emissions: Soil milling and dust curtain creation can generate fine particle emissions, with an impact on human health and the environment. Careful assessment of this impact and implementation of emission reduction measures, such as the use of filters or dust collection systems, are necessary.
Conclusions

The wildfire suppression equipment based on soil milling and the creation of a dust curtain presents an innovative approach with the potential to be effective in certain contexts, especially in areas with limited access to water sources, such as those affected by the fires in Los Angeles. Its main advantages are the use of local resources, independence from water sources, and the ability to create a barrier against fire spread. Also, the equipment has the potential to reduce the risk of water contamination, an important issue in fire-affected areas.

However, the efficiency of the equipment is dependent on weather conditions, especially wind, and there is a risk of long-term soil erosion. Wind speed and direction, as well as vegetation type, can significantly influence dust curtain dispersion and fire suppression efficiency.

To maximize efficiency and minimize environmental impact, improvements to the equipment design are needed, such as the use of more resistant materials and optimization of the milling machine shape. Integrating sensors to monitor environmental conditions and an automatic control system can contribute to adjusting operating parameters in real time and optimizing equipment performance.

It is also important to carefully assess environmental conditions and the type of fire before using this equipment. The production, operation, and maintenance costs of the equipment must be analyzed in comparison with other fire suppression methods to determine the economic feasibility of its use.

In addition to technical aspects, an analysis of the long-term impact on the environment is necessary, including CO2 emissions and fine particles generated by the equipment. Ethical aspects related to the use of natural resources and the potential impact on biodiversity must also be considered.

Further research is needed to assess the performance of the equipment in real fire conditions and to optimize its operation. Computer simulations and field tests can provide valuable information about the efficiency of the equipment in various fire scenarios and can contribute to the development of effective intervention strategies.

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