處理2噸蒸汽鍋爐的余熱回收問題的方法
Process 2 tons steam boiler heat recovery method
2噸蒸汽鍋爐中的余熱來自于蒸氣鍋爐的排污過程，一般的回收方式是用一個排污膨脹器收集排污水，然后進(jìn)行擴(kuò)容減壓，迅速形成二次蒸汽，然后利用二次蒸汽產(chǎn)生的熱量進(jìn)行加熱水的工作。
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.
但是這個回收方式存在三個問題。第一，最終排出蒸汽鍋爐的排污水仍然攜帶有大量能量，得不到合理的利用：第二，燃?xì)庹羝仩t燃燒強(qiáng)度差，起壓差，只要冷凝水溫度稍微高一點，給水泵就會產(chǎn)生汽化，不嫩正常工作;第三，為維持正常的生產(chǎn)，需要耗費大量的自來水和燃料。
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.
為解決傳統(tǒng)蒸汽鍋爐的回收方式，可采取以下兩種方式。第一種，從空氣預(yù)熱器上下手。采用以超導(dǎo)熱管為主要傳熱元件的空氣預(yù)熱器，換熱效率可達(dá)98%以上，比普通熱交換器高出很多。這種空氣預(yù)熱器裝置設(shè)計精巧，占地面積小，只有普通熱交換器的三分之一。同時還可以有效避免流體對換熱器的酸露點腐蝕，提高該設(shè)備的使用壽命。
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.
第二種，從混合水回收設(shè)備下手。采取密封、加壓的高溫混合水回收設(shè)備，可直接將一部分熱焓極高的閃蒸和高溫凝結(jié)水，采用高溫汽水混合回收直接回收壓入鍋爐形成產(chǎn)汽——用汽——再產(chǎn)汽的閉路循環(huán)系統(tǒng)從而提高了蒸汽有效熱利用率。也降低了電能、鹽能的消耗，降低了鍋爐負(fù)荷，節(jié)約了大量軟水。
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.
