The significance of the recycling of waste plastics is not only a simple waste, but also a more far-reaching and positive significance, mainly in two aspects of influence:
1. The impact of waste plastics on the environment
Since plastics are widely used in the packaging of products, most of the disposable one-time use causes well-known white pollution. For example, the use of agricultural mulch has brought great development to agriculture, but the debris after use has caused film fragments to the soil stroke barrier layer, degrading the quality of cultivated land, hindering the development of plant roots and the absorption of water nutrients, and poisoning the soil.
Plastic garbage is washed away by rain for a long time, and toxic additives in plastics will enter the groundwater, causing pollution in rivers and lakes, endangering human health! Therefore, various countries are also actively promoting the recycling technology of waste plastics, and the waste plastic pelletizing granulating machine is one of them. Recycling waste plastics by recycling, washing, crushing, dehydrating and drying.
2. The relationship between waste plastic recycling and energy
Modern plastics are basically products of petroleum. With the development of science and technology, oil recovery has risen sharply, and many countries have already faced the problem of energy shortage. Therefore, energy shortage has become a major factor in preventing social development, and the recycling of waste plastics will alleviate the increasingly serious shortage of resources to some extent.
So far, the world's production of plastic products has grown at a rate of more than 10% per year, resulting in an alarming amount of waste plastics. However, the recycling status of waste plastics in the world is not optimistic. Most of the waste plastics are landfilled.
In summary, the significance of the existence of waste plastic pelletizing granulating machine has a common goal with the recycling significance of waste plastics, and the plastic granulator is a way to realize the recycling of waste plastics.
Plastic granulators are divided into single screw granulators and twin screw granulators. The single-screw granulator can recover plastic film, woven bag, waste rayon fiber, greenhouse film, etc. The twin-screw granulator can recycle PET bottles (plastic beverage bottles), etc.
Pulverized fuel boiler induced draft fan is a driven fluid machine that relies on the mechanical energy input by the motor to increase the gas pressure and exhaust the gas. Induced draft fans for large-scale power station boilers are generally fixed-blade or adjustable-blade axial flow fans. The lifting force generated by the impeller rotation is used to introduce the flue gas in the boiler into the desulfurization island or chimney in the axial direction.
The normal operation of the induced draft fan can ensure the thermal circulation in the boiler and ensure the stable production and supply of electricity. However, due to the special working environment of the induced draft fan, frequent failures occur during continuous use, which seriously affects the normal operation of the power plant.
Boiler induced draft blade wear and corrosion are a common problem, so what causes this problem to occur frequently?
1. Because the blade is hollow, some dust in the air will enter the blade when the wind enters and exits, and the solid objects in the return stroke will cause friction with the blade and cause the blade to wear.
Or because the dust removal device of the equipment is not cleaned in time, the dust enters the blade, and its function is similar to that of a file, which exacerbates the wear of the blade. In the past, the blade edge will be worn until it breaks.
2. Thermal electric boiler flue gas desulfurization technology uses the flue gas to mix the dust in the flue gas and harmful gases such as sulfur dioxide and carbon monoxide into the water through the aqueous solution or water curtain to achieve the purpose of desulfurization. The induced draft fan is generally installed at the back of the desulfurization and dust removal equipment. When the induced draft fan sends air, the sulfides and carbides in the dust will corrode the blades. In addition, the sulfur dioxide gas generated by the boiler combustion will cause different degrees of corrosion to the blades.
Faced with the problems of wear and corrosion of the boiler induced draft fan, how should we solve it?
The pulverized fuel boiler induced draft fan can be coated with an anticorrosive coating, which is a highly functional two-component thermosetting polymer coating. The coating formed after curing exhibits superior corrosion resistance. The coating molecular cross-linking is mainly based on the ether bond method (COC). The ether bond is a very strong chemical bond. Compared with epoxy resins, it does not contain hydroxyl groups. Compared with vinyl esters, it has no ester bonds, so it can withstand hydrolysis. And acid attack.
Anticorrosive coatings have significant features and benefits, including:
• Strong corrosion resistance, can withstand many corrosive chemicals, including strong acids, strong bases, gases, solvents and oxidants
• Excellent abrasion resistance
• Excellent adhesion and adhesion to metal substrates, composite materials and concrete
• Excellent flexibility
• High temperature, cold and heat resistance
• Resistant to water clearing
The excellent performance of the anticorrosive coating has made it a good application in the wear and corrosion protection of boiler induced draft fans.
Garden tools are maintenance equipment for human greening scenes, and they are closely related to our lives. In order to make the plants in the garden have a better shape and can bring us beautiful enjoyment, the daily care of garden tools is very important.
The use of common garden tools and daily maintenance methods are introduced below.
There are many types of garden tools, each with its own purpose and characteristics. Common hedge trimmers, lawn mowers, chainsaws, garden shears, garden saws, electric chain saws, multifunctional machines, earth drills, chains, blades, saw blade Wait for a variety of garden tools.
Hedge trimmer
Hand-held wood cutting machine powered by gasoline engine and saw chain as cutting part. In forestry production, it is widely used in logging, pruning, and timber production. At present, most of them are used for shaping, pruning and pruning of landscaping.
Maintenance method: fully inspect the machine before use to ensure that the machine is in good condition before use, and at the same time regularly lubricate the machine head, chain and blade. If it is not used for a long time, it is best to start it once a week for 15 minutes each time.
Carbon Steel Geared wavy blades hedge shears
Because it is small and easy to carry, when using it to trim branches, you need to distinguish which scissors to use based on the thickness of the branches.
Maintenance method: After using the product, it also needs to be rust-proofed. This can prolong the life of the product and also save us some costs.
The lawn mower
Lawn mower is a mechanical tool for mowing lawns, vegetation, etc. It consists of a cutter head, an engine, a walking wheel, a walking mechanism, a blade, an armrest and a control part. The cutter head is mounted on the traveling wheel, the cutter head is equipped with an engine, and the output shaft of the engine is equipped with a blade. The blade uses the high-speed rotation of the engine to increase the speed a lot, saving the operation time of the weeder and reducing a lot of human resources.
Maintenance method: To ensure safety, be sure to remove the spark plug cap before performing any maintenance items. Change the oil every 1 month or 20 hours of work.Every 3 months or 50 hours of work, clean or replace the air filter. Every 6 months of use or 100 hours of work, change the oil, periodically check, clean or adjust the spark plug, and adjust the valve clearance.
Garden tools can easily rust metal and drop plating in a humid environment, so the place where garden tools are placed should be dry. If you want to clean garden tools, remember not to use boiling water or running water to clean them, just wipe them with a damp cloth. If it is improperly stored and rusted, don't sand it with sandpaper immediately. If it is relatively small, you can wipe it with cotton cloth and oil.
Finally, Metal Max reminded that all garden tools should be kept away from acid and alkali items. If they are accidentally stained with acid or alkaline products, rinse the stains with water in time, and then wipe them with cotton cloth. Prolonged sun exposure will cause the surface paint of garden tools to change color and fall, and oxidize and transform the metal on the inner layer. Therefore, it cannot be exposed to direct sunlight for a long time.
Garden tools are maintenance equipment for human greening scenes, and they are closely related to our lives. In order to make the plants in the garden have a better shape and can bring us beautiful enjoyment, the daily care of garden tools is very important.
The use of common garden tools and daily maintenance methods are introduced below.
There are many types of garden tools, each with its own purpose and characteristics. Common hedge trimmers, lawn mowers, chainsaws, garden shears, garden saws, electric chain saws, multifunctional machines, earth drills, chains, blades, saw blade Wait for a variety of garden tools.
Hedge trimmer
Hand-held wood cutting machine powered by gasoline engine and saw chain as cutting part. In forestry production, it is widely used in logging, pruning, and timber production. At present, most of them are used for shaping, pruning and pruning of landscaping.
Maintenance method: fully inspect the machine before use to ensure that the machine is in good condition before use, and at the same time regularly lubricate the machine head, chain and blade. If it is not used for a long time, it is best to start it once a week for 15 minutes each time.
Carbon Steel Geared wavy blades hedge shears
Because it is small and easy to carry, when using it to trim branches, you need to distinguish which scissors to use based on the thickness of the branches.
Maintenance method: After using the product, it also needs to be rust-proofed. This can prolong the life of the product and also save us some costs.
The lawn mower
Lawn mower is a mechanical tool for mowing lawns, vegetation, etc. It consists of a cutter head, an engine, a walking wheel, a walking mechanism, a blade, an armrest and a control part. The cutter head is mounted on the traveling wheel, the cutter head is equipped with an engine, and the output shaft of the engine is equipped with a blade. The blade uses the high-speed rotation of the engine to increase the speed a lot, saving the operation time of the weeder and reducing a lot of human resources.
Maintenance method: To ensure safety, be sure to remove the spark plug cap before performing any maintenance items. Change the oil every 1 month or 20 hours of work.Every 3 months or 50 hours of work, clean or replace the air filter. Every 6 months of use or 100 hours of work, change the oil, periodically check, clean or adjust the spark plug, and adjust the valve clearance.
Garden tools can easily rust metal and drop plating in a humid environment, so the place where garden tools are placed should be dry. If you want to clean garden tools, remember not to use boiling water or running water to clean them, just wipe them with a damp cloth. If it is improperly stored and rusted, don't sand it with sandpaper immediately. If it is relatively small, you can wipe it with cotton cloth and oil.
Finally, Metal Max reminded that all garden tools should be kept away from acid and alkali items. If they are accidentally stained with acid or alkaline products, rinse the stains with water in time, and then wipe them with cotton cloth. Prolonged sun exposure will cause the surface paint of garden tools to change color and fall, and oxidize and transform the metal on the inner layer. Therefore, it cannot be exposed to direct sunlight for a long time.
Fiber laser cutting machine has become an indispensable processing equipment in the modern sheet metal industry. With the upgrading of the industry and the improvement of processing requirements, after years of design and development, the company has successfully launched 4 series and more than 30 models. The fiber laser cutting machine not only has a high improvement in efficiency, but also achieves the ultimate in operational optimization. So, how does the fiber laser cutting machine operate in actual work?
1. Determine the materials to be processed, fix the sheet metal material on the processing machine, and then determine the smoothness of the material placement, so as to avoid the jitter in the cutting process and the cutting accuracy can not meet the requirements.
2. Operate the console, enter the product cutting pattern, and cut the material thickness and other parameters, then adjust the cutting head to the appropriate focus position, and repeatedly adjust the nozzle centering.
3. Start the regulator and the chiller, set the water temperature and water pressure of the chiller.
4. Start the laser and turn on the machine.
Although the above four points are very brief, it takes a lot of time to practice in the actual operation process to familiarize yourself with the details of each operation.
It is inevitable that there will be some faults and problems when operating the fiber laser cutting machine. How can we solve the common problems?
1. Boot without any reflection
◆ Check if the power fuse is burnt out. If it burns out, replace the fuse to ensure the normal operation of the machine.
◆ Check if the power input is normal, check the power input and make it normal.
◆ Check the main power switch for damage.
2. No laser output or laser is weak
◆ Whether the optical path is offset. If the optical path is offset, the optical path should be carefully adjusted.
◆ Whether the focus of the device is changed or not, the focal length of the device should be carefully adjusted to ensure the accuracy of cutting.
◆ If the laser tube is damaged or aging, check the use of the laser tube in time and replace the aging laser tube.
◆ Whether the laser power supply is energized, check the laser power supply circuit to make it normal.
◆ Whether the laser power supply is damaged or not, it is necessary to replace the damaged laser power supply in time.
3. Processing size has errors or malfunctions
◆ Check if the signal cable is normal and replace the signal cable in time.
◆ For unstable or interference signals in the power supply, install a voltage regulator or eliminate interference signals in time.
◆ Whether the processing parameters are set correctly. If there is an error, the corresponding parameters should be changed in time.
◆ Whether the machining program is written normally, check the programmed machining program, and modify it until it is normal.