The tube condenser can be effectively divided into three types: carbon steel tube condenser, stainless steel tube condenser and carbon steel and stainless steel mixed tube condenser. It can be divided into fixed tubesheet heat exchanger, floating head heat exchanger and U-tube heat exchanger. According to the structure, it can be divided into single pipe, double pipe and multi-pipe. Heat transfer area is 0.5-500 square meters. It can be customized according to users'needs. It is suitable for heat exchangers used in chemical, light industry, metallurgy, pharmacy, food, chemical fibre and other industries, especially for condensers, instead of stainless steel, enamel, graphite, glass condensers, with remarkable effect after use. 蒸呢機的特點
Characteristic of Tube Condenser
1. Corrosion resistance: Polypropylene has excellent chemical resistance. For inorganic compounds, no matter acid, alkali or salt solution, it has no destructive effect on inorganic compounds except strongly oxidizing materials, and almost all solvents are insoluble at room temperature. Generally, alkanes, alcohols, phenols, aldehydes, ketones and other mediums can make polypropylene insoluble. Use.
2. Temperature Resistance: The melting point of polypropylene plastics is 164-174 C, so the general temperature of use can reach 110-125 C.
3. Non-toxicity: non-scaling, non-polluting media, can also be used in the food industry.
4. Light weight: very convenient for installation and maintenance of equipment.
Tube condenser is one of the main heat exchangers in refrigeration, metallurgy, chemical industry and other industries. It is used in condenser. In fact, tubular condenser is a new energy-saving device, which has been applied in chemical industry.
During the operation of tube condenser, scale and dust are more easily polluted than other types of tube condenser because of its steam transpiration mechanism. Considering the protection of condenser is how to deal with the expansion of condenser. Tube condenser is operated outdoors. Because of transpiration, water outside the pipeline is easy to be corroded. In order to solve this problem, the upper and lower boxes of tubular condensers should meet the requirement of zinc thickness. Because of the continuous evaporation of water in the tube, it is easy to expand and shrink, which greatly reduces the heat transfer efficiency of the column-tube condenser. Therefore, the following methods can be used to deal with the fouling problem of the column condenser.
In the normal operation of tube condenser, it is important to keep the equipment pipeline clean when using, so as to protect the condenser. Selecting the cantilever shell-and-tube condenser, the main engine stops in the start-up process, because there is a pressure difference and the temperature difference of shell-and-tube condenser coil, the pressure difference and temperature difference will lead to the continuous elastic effect of copper, the scale of copper, mass, and different expansion coefficients are very large, so the cleaning function of cantilever shell-and-tube condenser Active. During operation, because refrigerant has a high frequency sense in the two stages of tube condenser, it is difficult to form expansion, which makes it impossible to adhere to the wall. Pre-membrane fouling should be carried out in the manufacturing process of condenser to prevent dust crystals from adhering to copper tubes.
Select a small amount of drainage equipment to control the concentration of calcium ion in circulating water within a certain range to avoid scale. It is possible to set up a pre-cooler and make the tube of shell-and-tube condenser transpire at the surface temperature of 50 C, and select a large-density water distribution device to ensure that the film is covered by water and not dry when the tube is small. When the external temperature of the heat exchange coil is less than 50 C, the scale and quality of the coil are loose and easy to clean. When the external temperature is higher than 50 C, the scale and quality of the attack are strong and difficult to eradicate. The water plate is set up to prevent the condenser from condensing.
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