Advantages of three different energy-saving hoods

Taking a toilet paper factory as an example, after introducing a new Yankee hood and air system, remarkable energy-saving effects have been achieved. First, under any operating condition, the hood can keep a proper distance from the drying cylinder, effectively reducing the overall thermal deformation; second, ensuring the heat transfer efficiency of the banner nozzle box, reducing the operating noise of the equipment and achieving uniform operation The third is to be able to tailor the equipment according to the production demand, reduce the heat loss and improve the drying efficiency. Let's talk about three different energy-saving hoods.

1 simple energy saving hood

The simple energy-saving hood of airtight hood manufacturer is generally used in high-speed toilet paper machine with speed of 500-700m / min. compared with Yankee hood, its structure is simpler and its energy-saving effect is obvious. It has been applied in many toilet paper manufacturers in China. The basic energy-saving principle of the simple energy-saving hood is to recycle most of the hot and humid gas discharged from the dry end of the toilet paper machine and a small part of the exhaust gas discharged from the wet end. After heating, the remaining part that cannot be used at all will be discharged as exhaust gas. In order to make full use of thermal energy and reduce energy waste as much as possible, the heater will not consume fresh steam basically, but use flash steam and condensation water discharged from the drying cylinder heat pump during operation to heat. In this case, the energy consumption can be basically controlled within 2.2 tons of steam / ton of paper, and the data is that no thermal insulation facilities are set for the hood air cylinder In the case of detection, if further strengthening enterprise management and increasing thermal insulation facilities, the energy-saving effect should be further improved.

2 energy saving hood

The energy-saving Jinan airtight hood is mainly for the high-speed toilet paper machine with the speed of 800-1000m / min. its principle is similar to the simple energy-saving hood, but because more exhaust gas needs to be removed in the operation process, and there is heat energy in the exhaust gas, in order to avoid waste, the link of heat recovery is increased. Generally, the output of the toilet paper machine with this speed is large, and the hot air intake hood The temperature is also relatively high. During the operation of the heater, not only the flash and condensate are used, but also the fresh saturated steam is needed. Compared with the original Yankee hood, the energy-saving hood, whether exhaust fan or circulation fan, has relatively small power and can recycle the waste gas. Therefore, in the actual use process, it can play a very significant energy-saving effect. Basically, the energy consumption per ton of paper can be controlled at 2.2 tons of steam.

3 high efficiency and high speed hot air hood

High efficiency and high-speed hot air hood is mainly for the high-speed toilet paper machine with the speed of 1100-1500m / min. in the design of the closed hood, the proper balance between energy consumption and production capacity is emphasized. According to the production and operation characteristics of high-speed toilet paper machine, in order to meet the needs of high speed and high output, the high-efficiency high-speed hot air hood adopts the structure of double in and double out. The hood body includes the dry end and the wet end, each part includes the suction chamber and the exhalation chamber, in which the suction chamber belongs to the external hood, and the exhalation chamber is composed of the nozzle and the air supply pipe In yankee cylinder, the air supply area of the hot air hood is mainly set according to the width of toilet paper products, and the corresponding damp proof layer and heat insulation layer are set outside the hood, which can not only prevent fire, but also effectively reduce heat loss.

Aiming at the high-speed toilet paper machine in the factory (the speed is more than 500m / min), on the basis of in-depth research on the structure technology of Yankee hood in the advanced countries in Europe and America, starting from its own production situation and energy-saving characteristics, the internal structure of the machine is optimized and improved, and three kinds of different hoods are developed, all of which have good energy-saving effect.