With the continuous development of science and technology, power-saving technologies emerge one after another, and electromagnetic heating technology is one of many energy-saving technologies. Due to the late development of energy-saving technology for electromagnetic heaters, it is still in its infancy, and many people don't know much about it. I have studied the application of electromagnetic heating technology on plastic machinery, and I will briefly introduce it to you.
In our life and production activities, heating is often used. Electric heating is the most common way. In the electric heating method, heating by a resistance wire is more common. However, the resistance wire is heated, its thermal efficiency is very low, and there are many other disadvantages. At present, electric heating is widely used in the production of plastics industry, and more than 90% use the heating method of resistance wire. This heating method mainly relies on contact conduction to transfer heat energy, and each of them is made of resistance wire. Only one surface of the heating plate and the ring contacts the part that needs to be heated, which in turn causes a large part of the heat energy to be dispersed in the air.
Energy conservation, first of all we must emphasize the savings, it can not create new energy. Through the above introduction, we can understand that the potential savings in the plastics industry is the part of the energy that is dissipated in the air. In theory, the traditional heating coil transmits half of the heat inside and outside, then we say that it is dissipated in the air. That's 50%, so the highest power saving rate in the ideal state is 50%, but we all know that nothing can be a perfect state, so it is impossible to have 50%, so we said The power saving rate under normal conditions should be about 40%.
Everything has rules and rules, but there are also special places. Although we say that the power saving rate under normal conditions is about 40%, we will encounter a special situation in the current plastic machinery. We all know that in the current presses, screw rotation is generally used to push the material forward. The material is between the screw and the barrel and has a large friction force. This force is related to the rotation speed of the screw, that is, the faster the rotation speed, the friction force. The larger the friction, the more often it will be converted into heat. That is to say, as long as the speed of the screw is fast enough, it can generate enough heat. This relationship is usually considered in the design of the press, but due to the current mechanical design and manufacturing capabilities, many devices are difficult to achieve an ideal state, and uneven. Under this premise, some equipments have just been modified to achieve an ideal heating state, that is, the heat generated by the screw rotation is slightly larger than the heat required for production and processing, and the external heating amount is completely unnecessary. The power saving rate will greatly exceed the theoretical value of 50%, up to 80%. In summary, we say that the normal power saving rate of electromagnetic heating energy-saving technology on plastic machinery is about 40%, and in special cases up to 80%. At present, some manufacturers have made special mentions for their own interests, claiming that the power saving rate is generally more than 60% is a kind of deception, reminding users to pay attention to screening.
Electromagnetic heating energy saving working principle:
At present, the heating method used in plastic machinery on the market is generally heating the electric heating ring, and the heat is transmitted to the cylinder through the contact conduction method, and only the heat immediately inside the surface of the cylinder can be transmitted to the cylinder, so that the heat outside Most of it is lost to the air, there is heat conduction loss, and the ambient temperature rises. Another disadvantage of the heating of the resistance wire is that the power density is low, and it cannot be adapted in some heating situations where a higher temperature is required. Electromagnetic heating technology is to make the metal barrel itself heat through the principle of electromagnetic induction, and it can wrap a certain thickness of thermal insulation material outside the barrel according to the specific situation, which greatly reduces the heat loss and improves the thermal efficiency, so the power saving effect Very significant, up to 30% to 75%. Because the electromagnetic heating ring itself does not generate heat, and is made of insulating material and high temperature cable, there is no problem that the resistance wire of the original electric heating ring is oxidized at a high temperature to shorten the service life, and has a long service life and a fast heating rate. No need for maintenance, etc., reducing maintenance time and reducing costs. It has been used by a large number of plastic products companies, greatly reducing the production costs of enterprises. More news can be viewed:
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High chlorinated Polyethylene Super - HCPE
Molecular Formula: [CH2-CHCl-CH2-CH2] n
EINECS No.: 208-407-7
CAS NO. : 63231-66-3
HCPE is a type of Chlorinated Polymer which contains chlorine at 65-69%. It is transparent, hard and brittle thermoplastic resins. It has high chemical stability, good salt water resistance and good ultraviolet resistance. It is readily soluble in organic solvents such as toluene, xylene and esters, forming a colorless to pale yellow, transparent solution. When this solution is applied to the surface of metal, concrete, paper etc., the solvent readily vaporizes at room temperature to leave a transparent, hard and lustrous glass-like film. This film resists the permeation of moisture and oxygen gas, and shows high resistance to various chemicals such as acids and alkalis. It protects the substrates from corrosion, and also serves as a top coating for decorative purposes.
HCPE can be used as gravure printing ink, the binder of heavy-duty anticorrosion paint, waterproof paint and the component of adhesives. Particularly, due to its high corrosive resistance to Cl-, it is especially suitable for being used on vessels, docks, containers coating. The paint made of HCPE can be used in chemical equipment, oil field pipelines, offshore facilities, ship coatings, metallurgy and mine, salt industry, fishing ground, wastes treatment, transportation facilities, container and electrical equipment. High molecular weight HCPE grades such as NVH -60 and NVH -120 are our unique products which are developed for all kinds adhesive for PVC pipe, pipe fittings, plates, sheets etc.
NV series are produced by our newly invented hydrochloric acid phase technology, in which no organic solvent such as carbon tetrachloride is involved, resulting no destruction to ozone layer and no harm to the operators health.
High Chlorinated Polyethylene HCPE, High Chlorinated Polyethylene, High Concentration Chlorinated Polyethylene
Shandong Novista Chemicals Co.,Ltd (Novista Group) , http://www.novistachem.com