处理2吨蒸汽锅炉的余热回收问题的方法
Process 2 tons steam boiler heat recovery method
2吨蒸汽锅炉中的余热来自于蒸气锅炉的排污过程，一般的回收方式是用一个排污膨胀器收集排污水，然后进行扩容减压，迅速形成二次蒸汽，然后利用二次蒸汽产生的热量进行加热水的工作。
In the steam boiler blowdown process of waste heat from the steam boiler, the general way of recycling is domestic sewage is collected by a drainage expander and then super-popular decompression, rapid formation of secondary steam, and then use the heat generated by the secondary steam for heating water.
但是这个回收方式存在三个问题。第一，最终排出蒸汽锅炉的排污水仍然携带有大量能量，得不到合理的利用：第二，燃气蒸汽锅炉燃烧强度差，起压差，只要冷凝水温度稍微高一点，给水泵就会产生汽化，不嫩正常工作;第三，为维持正常的生产，需要耗费大量的自来水和燃料。
But there are three problems with this recycling approach. First, eventually exhaust steam boiler sewage still carries a lot of energy, not the use of reasonable: second, gas steam boiler combustion intensity difference, differential pressure, as long as the condensate a slightly higher temperature, feed water pump will generate vaporization, not the normal work of the tender; Third, to maintain normal production, it takes a lot of running water and fuel.
为解决传统蒸汽锅炉的回收方式，可采取以下两种方式。第一种，从空气预热器上下手。采用以超导热管为主要传热元件的空气预热器，换热效率可达98%以上，比普通热交换器高出很多。这种空气预热器装置设计精巧，占地面积小，只有普通热交换器的三分之一。同时还可以有效避免流体对换热器的酸露点腐蚀，提高该设备的使用寿命。
In order to solve the traditional steam boiler recycling method, the following two ways can be adopted. The first is from the air preheater. Using superconducting heat pipe as the main heat transfer element, the heat transfer efficiency can be more than 98%, which is much higher than the ordinary heat exchanger. The air preheater is exquisitely designed, with a small footprint and only a third of the usual heat exchanger. At the same time, it can also effectively prevent the acid dew-point corrosion of the heat exchanger and improve the life of the equipment.
第二种，从混合水回收设备下手。采取密封、加压的高温混合水回收设备，可直接将一部分热焓极高的闪蒸和高温凝结水，采用高温汽水混合回收直接回收压入锅炉形成产汽——用汽——再产汽的闭路循环系统从而提高了蒸汽有效热利用率。也降低了电能、盐能的消耗，降低了锅炉负荷，节约了大量软水。
The second is from a hybrid water recovery device. To seal, pressure of high temperature mixed water recycling equipment, can be directly to the part of the flash with high enthalpy and the high temperature condensate, mixed with high-temperature soda directly recycling formation pressure into the boiler to produce steam, steam, to produce steam closed-circuit circulation system and improve the effective utilization rate of hot steam. It also reduces the consumption of electricity and salt, reduces the load of the boiler and saves a lot of soft water.
