c-cemg mechanical blog

Crane, derrick, and hoist safety are critical in preventing accidents and injuries in the workplace. Here are some key safety considerations for these types of equipment:

1. Equipment inspections: Inspect cranes, derricks, and hoists before each use to ensure that they are in safe working condition. Check for signs of wear and damage, ensure that all safety features are working properly, and verify that the load capacity is appropriate for the task.
2. Proper training: Ensure that workers are properly trained to operate cranes, derricks, and hoists. This includes understanding the equipment’s capabilities and limitations, as well as proper load handling techniques.
3. Load handling: Proper load handling is critical for crane, derrick, and hoist safety. Ensure that loads are properly secured and balanced, and do not exceed the equipment’s load capacity.
4. Communication: Communication is critical when operating cranes, derricks, and hoists. Use hand signals or radios to communicate with the operator, and make sure that all workers in the area are aware of the equipment’s movements.
5. Environmental factors: Environmental factors such as wind, rain, and snow can impact the safety of crane, derrick, and hoist operations. Monitor weather conditions and adjust operations as necessary.
6. Lockout/tagout procedures: Proper lockout/tagout procedures are critical for crane, derrick, and hoist safety. Ensure that all workers are trained to properly lock out and tag out equipment before performing maintenance or repairs.

Overall, crane, derrick, and hoist safety require proper equipment inspections, training, load handling techniques, communication, attention to environmental factors, and lockout/tagout procedures. By following these safety considerations, workplaces can help prevent accidents and injuries associated with these types of equipment.

Alkali metals cannot be extinguished with water.

Because the action of water and alkali metals (such as metal potassium and sodium) can decompose water to generate hydrogen and release a lot of heat, it is easy to cause an explosion.

Carbonated alkali metals and hydrogenated alkali metals cannot be extinguished with water.

Potassium carbide, sodium carbide, aluminum carbide, calcium carbide, potassium hydride, magnesium hydride, etc. can react with water and release a lot of heat, which may cause fire and explosion.

Ethylene liquids that are lighter than water and insoluble in water cannot be put out with water in principle.

Molten molten iron and molten steel cannot be extinguished with water, because the temperature of molten iron and molten steel is about 1600 degrees Celsius, and water vapor can decompose hydrogen and oxygen when it is above 1000 degrees Celsius, which may cause an explosion.

Three acids (sulfuric acid, nitric acid, hydrochloric acid) cannot be extinguished with strong water flow,

If necessary, use spray water to extinguish the fire.

High voltage electrical installation fire

If there is no good grounding equipment or the current is not cut off, it is generally not possible to splash with water.

When a fire comes, don’t panic, respond quickly to the police

Once a fire breaks out, don’t panic. If the fire is not serious, you should quickly use the simple fire extinguishing equipment you have, and take effective measures to control and put out the fire. If the fire is large, call 119 immediately. When calling the police, you must state the detailed address, fire location, fire material, fire size, name and phone number of the caller, and send someone to the intersection to meet the fire truck.

It is usually necessary to design several escape routes in different directions.

To escape in dense smoke, put your body down as much as possible, and cover your mouth and nose with a wet towel.

A plate and frame filter press is a type of mechanical dewatering equipment used for solid-liquid separation. The working principle of a plate and frame filter press is as follows:

• Preparatory phase: The slurry to be filtered is pumped into the filter press and distributed evenly among the filter plates.
• Filtration phase: The filter press is closed, and a hydraulic pump is used to apply pressure to the plates. The pressure forces the slurry to flow through the filter media and into the filter chambers, while the solids are retained on the filter media.

• Wash phase: After the filtration phase, the filter cake is washed with water or other cleaning agents to remove any remaining impurities.
• Drying phase: Once the washing is complete, the filter cake is dried by blowing air or applying heat.
• Discharge phase: Finally, the filter press is opened, and the filter cake is discharged from the filter plates. The process is then repeated for the next batch of slurry.

The plate and frame filter press consists of a series of filter plates and frames arranged alternately. The filter plates are covered with filter media, such as cloth or paper, which allows the slurry to pass through while retaining the solids.

The frames hold the filter plates in place and provide support for the hydraulic pump. The filter press is designed to handle a wide range of slurry types and can be used for applications such as wastewater treatment, mining, and food processing.

Household fire extinguishers are classified based on the type of fire they are designed to extinguish. There are four classes of fires, each with a different type of fuel source:

• Class A: Fires that involve ordinary combustibles such as wood, paper, or cloth.
• Class B: Fires that involve flammable liquids such as gasoline or oil.
• Class C: Fires that involve electrical equipment such as appliances or wiring.
• Class D: Fires that involve flammable metals such as magnesium or titanium.

Here are the types of household fire extinguishers and which class of fire they can be used on:

1. Class A extinguishers: These are designed to extinguish fires that involve ordinary combustibles such as wood, paper, or cloth.
2. Class B extinguishers: These are designed to extinguish fires that involve flammable liquids such as gasoline, oil, or grease.
3. Class C extinguishers: These are designed to extinguish fires that involve electrical equipment such as appliances or wiring.
4. Class ABC extinguishers: These are designed to extinguish fires that involve ordinary combustibles, flammable liquids, and electrical equipment.

When equipping your home with fire extinguishers, it is recommended to have at least one extinguisher on each level of your home, as well as in the kitchen, garage, and near any other potential fire hazards. Make sure the extinguisher is easily accessible and in good working condition, with the pressure gauge in the green zone and no signs of damage or corrosion. It is also important to read the instructions on the extinguisher and to familiarize yourself with its proper use before a fire emergency occurs.

shortcoming

Less strong and durable than woven cloth.

Cannot be washed like other cloths.

The fibers are arranged in a certain direction, so it is easy to split from the right angle direction and so on. Therefore, the improvement of the production method is mainly focused on the improvement of preventing splitting.

maintainance

Maintenance of non-woven fabrics: The following points should be paid attention to in the maintenance and collection of non-woven fabrics:

Keep it clean and change it frequently to prevent moths from breeding.

When storing in different seasons, it must be washed, ironed, and dried, then sealed in a plastic bag and placed flat in the wardrobe. Pay attention to shading to prevent fading. It should be ventilated frequently, dedusted and dehumidified, and should not be exposed to the sun. Anti-mildew and anti-moth tablets should be placed in the closet to prevent cashmere products from being damp, moldy and infested with insects.

When worn inside, the lining of the matching outerwear should be smooth, and hard objects such as pens, key cases, mobile phones, etc. should not be placed in the pockets to avoid local friction and pilling. Minimize friction with hard objects (such as sofa backs, armrests, table tops) and hooks when worn outside. Don’t wear it for too long. Stop wearing or change it for about 5 days to restore the elasticity of the clothes to avoid fiber fatigue and damage.

If there is pilling, do not pull it forcibly. You must cut off the pompon with scissors, so as not to be irreparable due to off-line.

Find the right fit for home

To know which fire extinguishers are suitable for your home, you must first understand the classification of the fire extinguishing agents they are filled with. Some people say it’s simple, isn’t it just divided into four categories: water, dry powder, foam and carbon dioxide fire extinguishers?

Unfortunately, this taxonomy is long outdated. The current fire extinguishers are divided into dry powder, water-based (including water and foam), carbon dioxide and clean gas fire extinguishers, plus the newly launched F-type fire extinguishers, a total of 5 categories. Among them, the most suitable for household use are dry powder fire extinguishers (especially ABC dry powder fire extinguishers), water-based fire extinguishers and F-type fire extinguishers, and the other two types are suitable for unit use.

How to purchase and maintain

Fire extinguishers can be purchased at local fire equipment stores or online, but be sure to choose brand-name products that have passed 3C certification. Taking the component injection hose as an example, the difference in cost price is more than 10 times, and the difference in quality can be imagined. It is worth mentioning that fire extinguishers are pressure vessels and cannot be brought into the subway if bought in a store, but they can be brought home by road vehicles.

Fire extinguishers are equipped at home to extinguish fires in the event of a fire. Whether a fire extinguisher can successfully extinguish an initial fire depends on three conditions: whether a sufficient amount of fire extinguishers can be obtained near the fire point; whether the fire extinguishers are available;

learn to use security

The home is equipped with a fire extinguisher, just one of the conditions. We also need to regularly inspect and maintain according to the regulations, and replace them when they are due; adults in the family must know how to use fire extinguishers, and master practical skills by simulating initial fire fighting or real fire extinguishing drills.

If a fire breaks out at home, the elderly and children should be evacuated from the door first, and the adult members should use fire extinguishers to put out the fire. If the flames reach the ceiling, it means that the initial fire fighting failed, and the fire extinguishers should close the door and escape immediately. When escaping, notify the neighbors by the way, and immediately call 119 to call the police when you reach a safe place.

Fire suppression

The primary use of fire hydrants is to provide firefighters with a ready supply of water to suppress fires. Fire hydrants are connected to the municipal water supply and can deliver large volumes of water quickly to the site of a fire.

Water supply

In addition to firefighting, fire hydrants can also be used to provide water for other purposes, such as cleaning streets or filling swimming pools. Some fire hydrants are equipped with special attachments that allow them to be used for other applications, such as watering lawns or gardens.

Pressure testing

Fire hydrants can also be used to test the water pressure in a municipal water system. By attaching a pressure gauge to the hydrant, technicians can determine whether the water pressure is adequate to meet the needs of the community.

Maintenance

Fire hydrants require regular maintenance to ensure that they are in good working order. This includes flushing the system to remove sediment and debris, testing the valves and fittings, and inspecting for damage or leaks.

Fire hydrants are a critical component of any community’s infrastructure, providing a reliable source of water for firefighting and other applications. Regular maintenance and testing are essential to ensure that fire hydrants are ready to perform when needed.