Q: Kodi mungasiyanitse bwanji pakati pa nthunzi yodzaza ndi nthunzi yotentha kwambiri?

A:

Mwachidule, jenereta ya nthunzi ndi boiler ya mafakitale yomwe imatenthetsa madzi mpaka kufika pamlingo wina kuti apange nthunzi yotentha kwambiri.Ogwiritsa ntchito amatha kugwiritsa ntchito nthunzi kupanga mafakitale kapena kutenthetsa ngati pakufunika.

Majenereta a nthunzi ndi otsika mtengo komanso osavuta kugwiritsa ntchito.Makamaka, ma jenereta a nthunzi ya gasi ndi ma jenereta a nthunzi yamagetsi omwe amagwiritsa ntchito mphamvu zoyera amakhala aukhondo komanso opanda kuipitsa.

Madzi akamasanduka nthunzi pamalo otsekeka ochepa, mamolekyu amadzimadziwo amalowa mumlengalenga kudzera pamadzimadzi ndikukhala mamolekyu a nthunzi.Popeza mamolekyu a nthunzi ali mukuyenda movutikira, amawombana wina ndi mnzake, khoma la chidebe ndi madzi amadzimadzi.Pamene ziwombana ndi madzi pamwamba, mamolekyu ena amakopeka ndi mamolekyu amadzimadzi ndi kubwerera kumadzimadzi kukhala mamolekyu amadzimadzi..Pamene mpweya uyamba, chiwerengero cha mamolekyu omwe amalowa mumlengalenga chimakhala chachikulu kuposa chiwerengero cha mamolekyu omwe amabwerera kumadzimadzi.Pamene kutuluka kwa nthunzi kumapitirira, kuchulukana kwa mamolekyu a nthunzi mumlengalenga kumawonjezeka, motero chiwerengero cha mamolekyu obwerera kumadzimadzi chimawonjezekanso.Pamene chiwerengero cha mamolekyu omwe amalowa mu danga pa nthawi ya unit ndi ofanana ndi chiwerengero cha mamolekyu obwerera kumadzimadzi, evaporation ndi condensation zimakhala zofanana.Panthawiyi, ngakhale kuti nthunzi ndi condensation zikupitirirabe, kuchuluka kwa mamolekyu a nthunzi mumlengalenga sikuwonjezeka.Dziko panthawiyi limatchedwa saturation state.Zamadzimadzi zomwe zimakhala zodzaza zimatchedwa madzi odzaza, ndipo nthunzi yake imatchedwa nthunzi youma (yotchedwanso saturated steam).

Ngati wosuta akufuna kukwaniritsa metering yolondola kwambiri ndi kuwunika, tikulimbikitsidwa kuti tizichita ngati nthunzi yotentha kwambiri ndikubwezera kutentha ndi kupanikizika.Komabe, poganizira za mtengo, makasitomala amathanso kubweza kutentha kokha.Malo abwino odzaza nthunzi amatanthauza mgwirizano womwe umakhalapo pakati pa kutentha, kuthamanga ndi kuchuluka kwa nthunzi.Ngati mmodzi wa iwo adziwika, mfundo zina ziwirizo zimakhazikika.Nthunzi yokhala ndi ubalewu imakhala ndi nthunzi yodzaza, apo ayi imatha kuwonedwa ngati nthunzi yotentha kwambiri poyezera.Pochita, kutentha kwa nthunzi yotentha kwambiri kumatha kukhala kokwera kwambiri, ndipo kupanikizika nthawi zambiri kumakhala kotsika kwambiri (nthunzi yodzaza kwambiri), 0.7MPa, 200 ° C nthunzi imakhala chonchi, ndipo ndi nthunzi yotentha kwambiri.

Popeza jenereta ya nthunzi ndi chipangizo champhamvu chamafuta chomwe chimagwiritsidwa ntchito kupeza nthunzi yapamwamba kwambiri, imapereka nthunzi yopangidwa ndi njira ziwiri, zomwe ndi nthunzi yodzaza ndi nthunzi yotentha kwambiri.Wina angafunse, kodi pali kusiyana kotani pakati pa nthunzi yodzaza ndi nthunzi yotentha kwambiri mu jenereta ya nthunzi?Lero, Nobeth alankhula nanu za kusiyana kwa nthunzi yodzaza ndi nthunzi yotentha kwambiri.

1. Nthunzi yodzaza ndi nthunzi yotentha kwambiri imakhala ndi maubwenzi osiyanasiyana ndi kutentha ndi kupanikizika.
Nthunzi yothira ndi nthunzi yomwe imachokera ku kutentha kwa madzi.Kutentha, kuthamanga, ndi kuchulukana kwa nthunzi yodzaza zimayenderana ndi chimodzi.Kutentha kwa nthunzi pansi pa mphamvu yomweyo ya mumlengalenga ndi 100°C.Ngati kutentha kwakukulu kwa nthunzi kumafunika, ingowonjezerani mphamvu ya nthunzi.
Nthunzi yotentha kwambiri imatenthedwanso pamaziko a nthunzi yodzaza, ndiko kuti, nthunzi yopangidwa ndi kutentha kwachiwiri.Nthunzi yotentha kwambiri imakhala ndi mphamvu ya nthunzi yomwe imakhala yosasinthika, koma kutentha kwake kumawonjezeka ndipo kuchuluka kwake kumawonjezeka.

2. Nthunzi yodzaza ndi nthunzi yotentha kwambiri imakhala ndi ntchito zosiyanasiyana
Nthunzi yotentha kwambiri imagwiritsidwa ntchito m'mafakitale amagetsi otenthetsera kuyendetsa ma turbines kuti apange magetsi.
Nthunzi yodzaza nthawi zambiri imagwiritsidwa ntchito potenthetsera zida kapena kusinthana kutentha.

3. Kutentha kwa kutentha kwa nthunzi yodzaza ndi nthunzi yotentha kwambiri ndi yosiyana.
Mphamvu yotumiza kutentha kwa nthunzi yotentha kwambiri ndiyotsika kuposa ya nthunzi yodzaza.
Chifukwa chake, panthawi yopanga, nthunzi yotentha kwambiri iyenera kusinthidwa kukhala nthunzi yodzaza ndi mpweya kudzera pakuchepetsa kutentha ndi kuchepetsa kupanikizika kuti mugwiritsenso ntchito.
Kuyika kwa chotenthetsera chotenthetsera ndi kutsitsa kuthamanga nthawi zambiri kumakhala kumapeto kwa zida zogwiritsira ntchito nthunzi komanso kumapeto kwa silinda.Itha kupereka nthunzi yodzaza ndi zida zogwiritsa ntchito nthunzi imodzi kapena zingapo ndikuwongolera kupanga bwino.