One is the dry furnace back, the other is the wet furnace back.

干背結(jié)構(gòu)對(duì)于制造廠來(lái)說(shuō)，具有制造工藝簡(jiǎn)便、耗材少等優(yōu)點(diǎn)。

Dry back structure has the advantages of simple manufacturing process and less consumables for manufacturers.

干背式燃?xì)忮仩t和濕背式燃?xì)忮仩t的優(yōu)缺點(diǎn)分析

Analysis on advantages and disadvantages of dry back gas fired boiler and wet back gas fired boiler

但對(duì)于使用用戶來(lái)說(shuō)，爐膽出口后的高溫?zé)煟?000℃以上）直接輻射轉(zhuǎn)煙室的耐火材料，使長(zhǎng)期在高溫中工作的耐火材料易損壞，往往需要較長(zhǎng)時(shí)間的停爐才能修復(fù)，極為不便。

However, for users, the high-temperature smoke (above 1000 ℃) directly radiates the refractory in the flue gas chamber after the furnace outlet, which makes the refractory materials working in high temperature for a long time easy to be damaged, and it is very inconvenient to repair the refractory after a long time of furnace shutdown.

干背式燃?xì)忮仩t和濕背式燃?xì)忮仩t的優(yōu)缺點(diǎn)分析

Analysis on advantages and disadvantages of dry back gas fired boiler and wet back gas fired boiler

濕背式爐體結(jié)構(gòu)，不存在燒壞的麻煩，同時(shí)大大提高了燃?xì)忮仩t的燃燒效率和熱效率，燃料在爐膽內(nèi)微正壓燃燒，高溫?zé)煔庋貭t膽向后經(jīng)回燃室轉(zhuǎn)折180°進(jìn)入煙道管束，經(jīng)壓迫式前煙箱再轉(zhuǎn)折180°進(jìn)入第二管束，經(jīng)過(guò)對(duì)流換熱后排入大氣。

The structure of wet back type furnace body has no burning out trouble, and greatly improves the combustion efficiency and thermal efficiency of the gas-fired boiler. The fuel is slightly positive pressure combustion in the furnace, and the high-temperature flue gas turns 180 ° along the furnace back through the reburning chamber to enter the first flue tube bundle, and then turns 180 ° through the compression type front smoke box to enter the second tube bundle, which is discharged into the atmosphere after convection heat exchange.

濕背式結(jié)構(gòu)的燃?xì)忮仩t優(yōu)點(diǎn)是爐膛后的回燃室是泡在水中的濕背回燃室，不存在燒壞的麻煩，正是由于濕背回燃室泡在水的包圍之中，同時(shí)也提高了鍋爐的輻射傳熱面積和傳熱效率，于是后來(lái)這種結(jié)構(gòu)的燃?xì)忮仩t在上深受歡迎。

The advantage of gas-fired boiler with wet back structure is that the reburning chamber behind the furnace is immersed in water, so there is no problem of burning out. It is precisely because the chamber is surrounded by water, and it also improves the radiation heat transfer area and heat transfer efficiency of the boiler. Therefore, the gas-fired boiler with this structure is very popular in the world.