Hauv kev lag luam boilers lossis fais fab nroj tsuag boilers, roj av ua kom tsim thiab siv tshuaj lom neeg thiab cov cua sov. Fossil cov roj (cov nkev roj, cov roj tov qhuav qhuav, thee, roj hnyav, thiab lwm yam.) Feem ntau siv raws li cov roj.
Cov roj no muaj ntau dua lossis tsawg dua ib qho nyiaj ntawm cov leej faj, uas yuav tsim li ntawd2nyob rau hauv tus txheej txheem ntawm peroxide sib xyaw. Vim muaj nyob ntawm cov kev tshaj tawm ntawm cov pa oxygen rau hauv cov kev sib txuas ua ke, ib qho me me ntawm yog li2txuas ntxiv ua ke nrog oxygen los ua li ntawd3, FE2O3Thiab v2O5nyob rau hauv ib txwm muaj huab cua ntau tshaj. (Flue roj thiab rhuab hlau nto muaj feem no).
Txog 1 ~ 3% ntawm tag nrho yog li ntawd2yog hloov mus rau li ntawd3Cov. Yog li3roj nyob rau hauv high-kub flue gas tsis corrode meters, tab sis thaum tus nplaim hluav taws kub poob qis dua 400 ° C, yog li ntawd3Yuav ua ke nrog dej vapor los tsim cov sulfuric acid vapor.
Cov tshuaj tiv thaiv cov tshuaj muaj raws li hauv qab no:
SO3+ H2O --- h2SO4
At the same time, the sulfuric acid liquid condensed on the low-temperature heating surface will also adhere to the dust in the flue gas to form sticky ash that is not easy to remove. Cov nplaim hluav taws roj channel yog thaiv lossis txawm tias thaiv, thiab cov kev tawm tsam tau nce, yog li ua kom muaj kev siv cov hluav taws xob tsis zoo. Corrosion thiab cov hmoov tshauv yuav ua rau muaj kev phom sij ntawm kev ua haujlwm ntawm boiler cua sov qhov chaw. Txij li thaum lub flue roj muaj ob qho tib si3thiab dej vapor, lawv yuav tsim H2SO4Vapor, ua rau muaj kev nce ntawm cov kua qaub lwg taw tes ntawm cov roj Flue. Thaum tus nplaim flue kub yog qis dua cov acid lwg taw tes kub ntawm cov roj flue, h2SO4Chav yuav ua raws li cov nplaim taws thiab cua sov ua kom haum h2SO4daws. Ntxiv corrodes cov khoom siv, ua rau cov pa hluav taws kub tsis huv thiab ua kom muaj kev puas tsuaj nrog cua.
In the supporting devices of the heating furnace or boiler, the energy consumption of the flue and heat exchanger accounts for about 50% of the total energy consumption of the device. Qhov ntsuas kub ua rau muaj kev puas tsuaj cuam tshuam rau kev ua haujlwm ntawm cua sov ua haujlwm ntawm cov cua sov thiab rhaub. Qhov siab dua qhov tso pa tawm, qhov qis dua qhov cua sov. Rau txhua 10 ° C nce rau kev pa ncho pa taws, lub thermal efficiency yuav txo qis los ntawm kwv yees li 1%. If the exhaust gas temperature is lower than the acid dew point temperature of the flue gas, it will cause equipment corrosion and cause safety hazards to the operation of heating furnaces and boilers.
Cov kev ua kom muaj kev kub ntxhov ntawm cua sov thiab cov rhaub dej sov thiab rhaub yuav tsum yog siab me ntsis dua li cov acid lwg taw tes kub ntawm cov roj liab. Therefore, determining the acid dew point temperature of heating furnaces and boilers is the key to improving operating thermal efficiency and reducing operating safety hazards.
Lub Sijhawm Post: Jan-05-2022
