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列管式冷凝器常用的加热剂和冷却剂主要是什么

人气:79 评论:0 日期:2019-01-11 09:56:17

列管式冷凝器在选用加热剂和冷却剂的时候主要考虑来源方便,有足够的温度,价格低廉,使用安全。在市场上,加热剂和冷却剂得物料种类很多,列管式冷凝器常用的加热剂有饱和和水蒸气,烟道气和热水等。常用的冷却剂有水,空气和氮等。列管式冷凝器常用的加热剂

When choosing heater and coolant, tubular condenser mainly considers convenient source, sufficient temperature, low price and safe use. In the market, there are many kinds of heaters and coolants, such as saturated water vapor, flue gas and hot water. Commonly used coolants are water, air and nitrogen. Heater commonly used in tubular condenser

1、烟道气燃料燃烧所得到的烟道气具有很高的温度,可达700~1000℃,适用于需要达到高温度的加热。用烟道气加热的缺点是他的比热低,控制困难及传热膜系数很低。除了以上两种常用的加热剂之外,还可以结合工厂的具体情况,采用热空气作为加热剂。也可应用热水来作为加热剂。

1. The flue gas obtained from the combustion of flue gas fuel has a very high temperature, which can reach 700-1000 C. It is suitable for heating at high temperature. The disadvantage of flue gas heating is its low specific heat, difficult control and low heat transfer film coefficient. In addition to the above two commonly used heating agents, hot air can also be used as heating agent according to the specific conditions of the factory. Hot water can also be used as a heating agent.

2、饱和水蒸汽饱和的水蒸汽是一种应用较广的加热剂,由于饱和水蒸汽冷凝时的传热膜系数很高,可以改变蒸汽的压强以准确地调节加热温度,而且常可利用价格低廉的蒸汽机及涡轮和排放的废气。但饱和水蒸汽温度超过一百八十摄氏度,就需采用很高的压强。一般只用于加热温度在一百八十摄氏度以下的情况。

2. Saturated water vapor is a widely used heating agent. Because of the high heat transfer film coefficient of saturated water vapor condensation, the pressure of vapor can be changed to accurately regulate the heating temperature, and the low-cost steam engine, turbine and exhaust gas can often be used. But when the temperature of saturated water vapor exceeds 180 degrees Celsius, a high pressure is required. Usually only for heating temperature below 180 degrees Celsius.

列管式冷凝器常用的冷却剂

Coolants commonly used in tubular condensers

1、水和空气是比较常用的冷却剂,他们可以直接取自大自然,不必特别加工。以水和空气比较,水的比热高,传热膜系数也很高,但空气的取得和使用比水方便,应因地制宜加以选用。水和空气作为冷却剂变到当地气温的限制,一般冷却温度为十至二十五摄氏度。如果要冷却到较低的温度,则需应用低温剂,常用的低温剂有冷冻盐水(氯化钙,氯化钠及其它溶液)。

1. Water and air are commonly used coolants. They can be taken directly from nature without special processing. Compared with water and air, the specific heat of water is higher and the coefficient of heat transfer film is also higher. However, air is more convenient to obtain and use than water, so it should be selected according to local conditions. Water and air are used as coolants to limit the local temperature, usually 10 to 25 degrees Celsius. If it is to be cooled to a lower temperature, cryogenic agents are needed. The commonly used cryogenic agents are frozen brine (calcium chloride, sodium chloride and other solutions).

2、冷却剂的使用,主要考虑产品本身的特性,冷却程度以及列管式冷凝器的使用环境,时间等;只要综合性的考量,才能选择好合适的冷却剂产品。

2. The use of coolant mainly takes into account the characteristics of the product itself, the degree of cooling and the use environment and time of the tubular condenser. Only by comprehensive consideration can we choose the appropriate coolant product.

所以对于选择列管式冷凝器常用的冷却剂和加热剂一定要结合实际情况来,进行综合考量,才能选择出适合列管式冷凝器的冷却剂和加热剂。

Therefore, for choosing the commonly used coolant and heater for tubular condenser, we must consider the actual situation comprehensively, in order to select the suitable coolant and heater for tubular condenser. 

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