Heat pump drying technology principles

A heat pump dryer principle Heat pump dryer is the use of anti-Carnot principle, the absorption of air heat and transferred to the room, to achieve the temperature rise of the drying room, with the appropriate equipment to achieve the material drying. Heat pump dryer from the compressor - heat exchanger (internal) - throttle - heat sink (external) - compressor and other devices form a circulation system. The refrigerant circulates through the system under the action of the compressor. It is in the compressor to complete the gaseous heating process (temperature up to 100 ℃), it enters the machine to release high-temperature heat heating and drying room air, while being cooled and transformed into a liquid state, when it runs to the machine After the liquid rapidly absorbs heat and evaporates again into the gas, while the temperature dropped to minus 20 ℃ - 30 ℃, then the heat around the air will be an endless stream of heat transfer to the refrigerant. Refrigerant constantly circulating to achieve the heat in the air to the drying room to heat the room air temperature.
Two heat pump drying oven performance characteristics:
1. Easy to install: easy to install, demolition, covers an area of ​​less, can be installed indoors and outdoors;
2. Energy-efficient: just consume a small amount of electricity, you can absorb a lot of heat in the air, the power consumption is only 1 / 3-1 / 4 of the heater; with coal, oil and gas drying equipment compared , Can save about 75% of operating costs. 1 kWh equals 4 kWh.
3. Environmental pollution: no any combustion and emissions, is a sustainable development of environmentally friendly products.
4. Safe and reliable operation: the whole system is running without the danger of combustibility, explosion, poisoning and short circuit which may exist in the traditional dryer (fuel, gas or electric heating). It is an absolutely safe and reliable closed drying system.
5. Long service life and low maintenance cost: It is developed on the basis of the traditional air-conditioning technology. The technology is mature, the performance is stable, reliable and the service life is long. The operation is safe and reliable, and it is free from manual operation and intelligent control.
6. Comfort and convenience, automation, high degree of intelligence: the use of automatic temperature control device, 24-hour continuous drying operation.
7. Wide range of applications, free from the impact of climate: It can be widely applied to the heating and drying operations of food, chemical, pharmaceutical, paper, leather, wood, agricultural and sideline products processing industries.
Third, the application of heat pump drying and drying technology With the continuous expansion of the scale of industrial production, the traditional drying efficiency and high cost of drying methods are increasingly unable to meet existing needs.
Heat pump as a new, energy-saving new technology. To a large extent, the problems of slow drying efficiency and high drying cost are solved. Under the background of slow drying efficiency and high drying cost, if the drying temperature is below 100 degrees, the choice of heat pump drying will be a preferred direction for the enterprise.
At present, heat pump drying has gradually been applied in many industries. For example: Tobacco drying tobacco industry, the food industry starch, rice dry, paint the surface of the material drying, drying temperature of 100 degrees below the material drying.
Heat pump drying is moving to improve the drying temperature, the development of new heat pump drying system, and automatic control of heat pump technology and other aspects of development, heat pump drying will reduce energy consumption and improve product quality will be a perfect unification of both technologies will bring significant drying industry Technological revolution.

Cold Drawn Steel Bar

Cold drawn steel bar is produced by hot rolled steel bar or wire rod to get smooth surface, more precision size, higher mechanical properties, which improves machining characteristics. It can also get various sections and sizes. So cold drawn steel bar is a better choice for machining users.

According to different steel grade, the production line is usually different. The Basic production line is as below:

Cold Drawn Steel Bar

For high carbon steel or alloy steel bars, to avoid the cracks in inner or surface, the bars are usually required to be annealed before cold drawing.

To get different mechanical properties or hardness depending on final usage, the cold drawn bars will also be heat treated such as annealed, normalized or quenched and tempered(Q&T).

For CNC machines usage, to get much more precision sizes or much more better surface roughness for chrome plating, the cold drawn steel bars can also be centerless ground or polished.

We have more advantages on producing cold drawn steel bars:

1) Big stocks of hot rolled round bars or wire rods as raw materials

2) Wide range of cold drawn steel bar sizes: from 10mm to 150mm

3) Different cold drawing medias powder or oil to get different surface

4) Straightening machines to get better straightness up to 0.5mm/m

5) Grinding and polishing machines to get better roughness upto 0.4um

6) Heat treating furnaces to adjust the mechanical properties

7) Full sets of testing equipment to test the sizes, mechanical properties and microstructure.

8) Multiple packages to avoid broken packages and anti-rusty

Cold Drawn Bar,Round Steel Bar,Cold Drawn Steel Bar,Aisi 1018 Steel Square Bar

SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdcolddrawnsteelbar.com

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